The shot blasting and painting line successfully accepted at the customer site

Qinggong Machinery production a set of shot blasting and painting line for our customer. Last week the machine is successfully accepted at the customer site. The cleaning effect and the coating effect are well received by the customer.

The structure and the principle of shot blasting and painting line

  1. The structure of the shot blasting and painting line

The shot blasting and painting line including a shot blasting system, painting system, drying system, and paint mist treatment system. The machine combines all system with a whole, to form a continuous automatic shot blasting and coating production line.

The shot blasting and painting line successfully accepted at the customer site 1

  1. The principle of shot blasting and painting line

The shot blasting and painting line uses the roller type continuous feeding shot blasting machine. During the shot blasting process, the adjustable speed roller conveyor controlled by the electric panel the steel structure or steel into the ejection zone of the blasting chamber. The strong and dense projectiles in the coordinate position hit and rubbed, causing the oxide scale, rust layer and dirt on it to quickly fall off, and the steel surface will obtain a certain roughness and smooth surface, and the workpiece is loaded and unloaded on the inlet and outlet rollers on both sides of the cleaning room. The projectiles and rust dust falling on the steel are blown by the blowing system, and the dropped abrasive dust mixture is conveyed by the recovery screw to the hopper, and the longitudinal and crosswise screw conveyors are collected in the lower part of the bucket elevator, and then lifted to the upper part of the machine for separation, the separated pure projectiles fall into the separator hopper for blasting recycling. Dust generated in shot blasting is sent to the dust removal system by the exhaust pipe, and the purified gas is discharged into the atmosphere, and the particulate dust is captured and collected.

After shot blasting, the workpiece enters the painting room, and the spray gun is evenly sprayed on the surface of the workpiece, and the workpiece is pushed to the drying room by the rotation of the roller table.

The workpiece enters the drying room, and the hot air is used to dry the paint layer attached to the workpiece using the principle of thermal circulation. The roller conveyor in the drying room is conveyed by a plated chain to reduce the contact surface of the workpiece to avoid damage to the coating.

As a procedure, the surface treatment is completed on the shot blasting and painting line. The shot blasting and painting line is a process that combines the processes of shot blasting, primer coating, and drying. After this process, the steel plate and profile are thoroughly shot blasted, and at the same time, an anti-corrosion coating can be sprayed. Compared with the traditional pickling spraying system, the shot blasting and painting system has many advantages. First, it is environmentally friendly and pollution-free. The use of steel shot will not cause waste pollution. Second, it will not cause hydrogen embrittlement. Third, shot blasting can complete texturing and avoid secondary texturing. Fourth, shot blasting can achieve stress strengthening and extend the life of the workpiece.

The shot blasting and painting line successfully accept in customers site 2

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Cylinder diabolo shot blasting machine

Cylinder shot blasting machine is mainly used to clean the surface of the surface of steel cylinders of various diameters. It can apply strong shot blasting to the surface of the steel in the original state to remove the rust and rust layer and its oxide scale on it to obtain a certain degree smooth finish, uniform metallic luster surface, in order to remove stress, improve the surface coating quality and corrosion resistance of steel.

The cylinder shot blasting machine is a  conveyor through shot blasting equipment, which consists of a loading feeding mechanism, a feeding roller conveyor, the blast turbine, a feeding roller conveyor, a unloading feeding mechanism, an air control system, an electric control system and a dust removal system. The shot blasting machine is composed of shot blasting chamber, shot blasting turbines assembly, blasting pipe and grid, blasting slag separator, bucket elevator, platform ladder railing, abrasive supply system and other components. Most of the weldments of this machine are shot and shot blasted to improve the anti-rust performance and paint film adhesion.

Cylinder diabolo shot blasting machine 1

  1. Into (out) roller conveyor

The into and out feeding roller conveyor is responsible for sending the workpiece into and out of the blasting chamber for cleaning. The into and out feeding roller conveyor is arranged at an inclination, and the workpiece rolls into the cleaning station by its own acceleration based on the initial acceleration.

  1. Workpiece turning mechanism

The workpiece turning mechanism turns the workpiece from the rotation state to the rolling state. The power for turning the workpiece comes from the cylinder.

  1. Workpiece rotation mechanism

When the workpiece rolls from the slide into the cleaning station, it enters the cleaning state. At this time, the workpiece is supported by two rollers and is rotated by the rollers (by friction).

This machine is a high-function continuous operation cleaning with continuous feeding. During the cleaning process, the electromagnetic speed-regulated conveying roller is controlled by the electricity to send the steel cylinder into the ejection zone of the cleaning machine room. All sides of its body are affected by four different coordinate positions. The impact and friction of the powerful and dense projectiles caused the oxidized rust layer and its dirt to fall off quickly, and the surface of the steel cylinder obtained a bright surface with a certain roughness. The falling projectiles and rust dust are transported to the abrasive recycle system by the recovery screw. Load and unload workpieces on both sides of the roller conveyor outside the blasting chamber. During the cleaning process, the sprinkled pellet dust mixture is collected in the lower part of the elevator through the chamber funnel and the longitudinal and crosswise screw conveyor, and then lifted to the separator on the upper part of the machine. The separated pure steel shots fall into the separator hopper. Dust generated in shot blasting is sent to the dust removal system by the exhaust pipe, and the purified gas is discharged into the atmosphere. The granular dust is sent to the dust removal system by the exhaust pipe, and the purified gas is discharged into the atmosphere. The granular dust is captured and collected.

Cylinder diabolo shot blasting machine 2

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What is the feature of wire rod coil shot blasting machine

The wire rod coil shot blasting machine is suitable for shot blasting and strengthening round link coil. The wire rod coil shot blasting machine have 3-6 sets blast turbines. It not only can stasfied with different working capacity, but also can adjustment according to different workpieces.  The  highest speed can up to 120m/min. The wire rod coil shot blasting machine is the most suitable machine for clean the oxide scale on the wire rod coil surface. It can increase the tensile strength and stress corrosion cracking resistance of the wire surface and obtain a permanent service life.

Most customer wondered if What is the feature of wire rod coil shot blasting machine. Now let QGMA machinery introduce some details to you:

High working efficiency of wire rod coil shot blasting machine

  1. The wire rod coil shot blasting machine adopt to the newest type of high efficiency direct coupled blast turbine without the guard plate motor, which have large shot blasting volume and high projectile speed under the same power. The projectile speed can up to 80m/s. The layout of the blast turbines adopt computer simulation design, multi angle and 360 degree projectile the workpiece to make the coverage of the projectile uniform. The  wire rod coil shot blasting machine is used double disk impeller and the blade groove is closed, which increase the impact density of the projectile ray material. Great blows to improve the cleaning effect, at the same time it has the advantages of convenient blade replacement and simple maintenance. It only takes 3 to 6 minutes to replace the blades. The separation device adopts overflow induction, full curtain flow curtain type pellet separator and the separation efficiency is up to 99.9%.
  2. The wire rod coil shot blasting machine adopts the BE type slag separator, which greatly improves the separation amount and separation efficiency, reduces the impurity quality in the circulating projectile, improves the shot blasting quality of the shot blasting machine and reduces the wear on the blades.
  3. The box-type external blast turbine blasting chamber of the wire rod coil shot blasting machine is changed to a built-in blast turbine blasting chamebr and the projectiles are hit on the wire workpiece at close range, which greatly increases the efficiency and effect of cleaning and rust removal. Four sets of blast turbines layout 180 degree two by two interval arrangement enhances the uniformity and full envelopment of the wire for projectile cleaning .
  4. The bucket elevator of the wire rod coil shot blasting machine adopts double safety design: one is that the transmission head wheel adopts a ratchet and pawl mechanism to prevent reversal; the other is that the transmission motor adopts a brake motor to prevent reversal. At the same time, there is a lost rotation detection alarm device at the passive wheel.
  5. The workpiece detection device of the wire rod coil shot blasting machine can effectively control the on and off time of the blast turbine, avoid the ineffective and empty shot of the blast turbine, save energy and increase the life of the vulnerable parts such as the chamber body guard and the blast turbines.
  6. The wire rod coil shot blasting machine is equipped with functions such as automatic fault detection and delayed automatic stop after alarm.
  7. Using high-efficiency filter cartridge dust collector, the dust emission is less than 50mg/m3, which improves the working environment of workers

The roller conveyor adopts color-changing speed regulation and the cleaning speed can be adjusted at any time from 0.5-2m/min to achieve the ideal shot blasting and rust removal effect (Sa2.5 level).

What is the feature of wire rod coil shot blasting machine 1

Good sealing effect of wire rod coil shot blasting machine

The wire rod coil shot blasting machine is equipped with a multi-layer resin rubber curtain and a sealed box with a sealing brush at the inlet and outlet of the shot blasting chamber. That is, when the workpiece runs to the cleaning station before cleaning, the resin rubber sheet and the brush seal and cover the splashing projectiles inside the chamber and completely prevent the projectiles from escaping from the inside of the chamber.

The safe and reliable performance of wire rod coil shot blasting machine

  1. The electrical control of the wire rod coil shot blasting machine is interlocked with various functional parts and the blast turbines cannot be opened when the inspection door of the blasting chamber is opened to prevent the projectile from hurting people.
  2. The dust collector, bucket elevator, bottom screw conveyor, inspection door, etc of the wire rod coil shot blasting machine are all interlocked with the opening of the blast turbine. When the blast turbine is turned on in sequence, the operation is stable and reliable and the shot gate can be opened. The projectiles in the separator enter the shot blasting device continuously and are thrown by the high-speed rotating blades, hit on the surface of the wire, clean up the grease and rust on the surface of the wire and the wire presents a bright metallic luster. Realize the rapid conveying and continuous feeding of the wire workpiece The wire shot blasting machine has the advantages of no pickling, environmental protection, energy saving, high efficiency and convenient use. Its main function is to remove the oxide scale, grease and rust on the surface of the wire without pickling. Make the wire surface get a good cleaning effect. At the same time, it also has the characteristics of eliminating the internal stress of the wire, improving the fatigue strength of the wire surface and prolonging the service life. It eliminates the environmental pollution caused by the wire pickling and rust removal and the harm to the human body.

What is the feature of wire rod coil shot blasting machine 2

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How to install shot blasting machine

Shot blasting machine is used to remove sticky sand and oxide scale in casting and forging parts. It mainly uses the high-speed rotating impeller to throw the shot sand out and hit the surface of the part at high speed to meet the requirements of surface treatment. Shot blasting machine is the non-standard machine, it can according to the customers requirements to do some special design.

Roller conveyor shot blasting machine for Malaysian customers 2

Many customers worry that our engineers can not install the machine in site because of the COVID-19. How to installation the roller conveyor shot blasting machine has become a difficult problem for customer whether to purchase the machine.

Today let QGMA Machinery tell you some installation step of install roller conveyor shot blasting machine.

Space Requirements

Sufficient space must be provided for the installer to assemble and move the transported parts, the elevator belt shaft and the shot blasting wheel, and have unobstructed passages. Also consider that there is enough space on the loading and unloading device to load and unload the workpiece.

Environmental Impact

The temperature around the control cabinet must not be higher than 40°C. The operator’s work area should have adequate lighting.

The surrounding area of the machine must be kept clean, and oil spills and pellet debris must be removed immediately.

Fixation of shot blasting machine on foundation

Drill holes in the foundation, paying attention to the diameter and depth of the holes. Thoroughly clean the foundation holes.Blow at least twice, wash twice and blow twice. Uncleaned foundation holes will reduce load-bearing capacity.

Pour cement slurry into the foundation hole and ensure that there is no air bubbles (the depth of the cement slurry is about 2/3 of the hole depth). Push the anchor bolt while gently rotating it into the bottom of the foundation hole. When the anchor bolt reaches the bottom, the cement slurry should be flush with the surface of the foundation.

If the cement slurry is not level with the surface of the foundation after the anchor bolts are in place, immediately pull out the anchor bolts and pour the cement slurry into the foundation holes. The shot blasting machine can be fixed only when the cement slurry is completely hardened.

How to installation the shot blasting machine 1

Installation of Dust Collector

There must be enough space to remove dust after installing the dust collector. Usually only one flange is welded to each pipe. The second flange must be welded to the assembly.

The ignition of fine dust can cause fire and explosion hazards. In order to avoid static charges, all contacts on the duct system must be equipotentially connected and grounded. Dust deposits in the ducts can cause fires and dust explosions. It is strictly forbidden to smoke, light or ignite near the dust collector and the machine.

Installation of shot blasting machine

  1. Measure the foundation.
  2. Mark the foundation of the shot blasting machine, bucket elevator and screw conveyor and the position marks of the bracket and dust collector according to the installation and static load plan. Check the levelness of the machine parts.
  3. Assemble shot blasting chamber.
  4. Install all blast wheels and motors.
  5. Install the platform, screw conveyor, abrasive storage hopper feed valve and abrasive feed valve.
  6. Install pneumatic components.
  7. Install the separator.
  8. Arrange all the machine parts.
  9. Install the dust removal pipe to the dust collector.
  10. Install the exhaust pipe and other pipelines.
  11. Install and connect the bucket elevator belt.

How to installation the shot blasting machine 2

Electrical Installation

Electrical installation includes all wiring and wiring installation of the shot blasting machine. Electrical assembly can only be completed by qualified electrical technicians.

Do not install the control room directly on any transportation or passageway. Must be easily accessible.

The electrical components of the control room and the machine (motors, limit switches, proximity switches, valves, sensors, control boxes, emergency stop buttons, etc.) should be connected according to the circuit diagram. The size of the cable has been explained in the electrical diagram. All devices and cables must be installed according to the label on the circuit icon.

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Comparison and analysis between different types of shot blasting machine

Shot blasting machine is a kind of machine which can projected the abrasive with high-speed to the clean and strength the casting metal surface. The machine also can clean the sand or the remove the core of the casting. So the shot blasting machine is mainly used in casting industry. Now QGMA Machinery will make a comparision and analysis between the hanger type shot blasting machine, tumble belt shot blasting and roller conveyor shot blasting machine.

What is the same point of various type of shot blasting machine?

Which type of shot blasting machine to be used is up to the workpiece need to be cleaned. But the same point is that all kind of shot blasting machine have the same cleaning effect, because all shot blasting machine use the blast turbines projected the abrasive to remove rust and strength the workpiece surface. We need to according to the workpiece to choose the abrasive with different size and adjustment the blast turbines blasting angle.

Comparison and analysis between different types of shot blasting machine 2

How to choose the suitable shot blasting machine according to the workpiece?

  • Small workpieces that are not afraid of collisions almost use the tumble belt shot blasting machine. The working principle of tumble belt shot blasting machine is that after the workpieces put into the blasting chamber, close the door and turn on the machine. The workpieces are driven by the belt and start to turn over and the blast turbine projected abrasive with high-speed hit the workpieces surface average to achieve the purpose of cleaning. Used abrasive, dust and sand mixture flown into the bottom screw conveyor through the hole on the tumble belt. Via the screw conveyor to the bucket elevator, then transport to the separator. In separator the air with dust will sucked by the fan and through the dust collector to be filtered to become the clean air into the atmosphere. The dust through the pulse by the air and fall down into the dust collect box at the bottom of the dust collector and user need to clean it regularly. The waste sand flow out from the waste pipe and can be reused by users. The dust and sand mixture will be separate by the separator. The cleaned abrasive can be recycle into the blast turbines.
  • The workpiece can be easy to hang or avoid collision should be used the hanger type shot blasting machine. Because of the machine have high working efficiency and flexibility. So this type of shot blasting machine is widely used in all kind of industry, which is the ideal shot blasting machine. The operation is very simple, just hang the workpieces on the hook and turn on the machine. After a 5-7 minutes the whole cleaning process are completed, all rust and dust will be removed. The hanger type shot blasting machine is suitable for surface cleaning or strengthening treatment of small and medium-sized castings and forgings in the casting, construction, chemical, electrical, machine tool and other industries. It is especially suitable for surface cleaning and shot blasting of castings, forgings and steel structural parts of many varieties and small batches to remove a small amount of sticky sand, sand core and oxide scale on the surface of the workpiece; it is also suitable for surface cleaning and strengthening of heat-treated parts. Especially suitable for the cleaning of slender and thin-walled parts that are not suitable for collision.

Comparison and analysis between different types of shot blasting machine 3

  • The workpiece with relatively large and long size the roller conveyor shot blasting machine can be used. During the cleaning process, the electrically controlled adjustable-speed roller conveyor send the steel structure or steel into the shot blasting area of the shot blasting chamber. Every surface of the workpiece are hit and rubbed by powerful and dense abrasive from different coordinate directions, so that the oxide scale, rust layer and dirt on it will quickly fall off and the surface of the steel will get a smooth surface with a certain roughness. The workpiece will loading and unloading on the inlet and outlet rollers. The abrasive and rust dust falling on the steel are blown by the blowing device and the scattered abrasive dust mixture is conveyed by the crosswise and longitudinal screw conveyors and then collected in the lower part of the bucket elevator. Then lifted to the separator. After separated the cleaned abrasive will fall into the separator hopper for blasting recycling. Dust generated in shot blasting is sent to the dust removal system by the exhaust pipe, and the purified air is discharged into the atmosphere and the particulate dust is captured and collected.

All the shot blasting angle and position are designed by computer. To make sure all workpieces can be blast, the layout of the blast turbines are simulated by the 3D dynamically. That design not only can reduce the empty throw and increase the abrasive using rate. But also can reduce the wear of the plate guard in the blasting chamber.

Comparison and analysis between different types of shot blasting machine 1

Is the shot blasting machine to take explosion-proof measures?

Whether the shot blasting machine should take some explosion-proof measures depends on the use environment of the equipment, the type of the work piece and the application requirements and so on. If the work piece are the aluminum alloy, magnesium alloy, titanium alloy will produce explosive dust in the process of shot blasting, or if there is explosion danger in some environmental conditions like in a certain concentration, high temperature, static electricity, friction and other conditions.It is necessary to take some explosion-proof measures to avoid or prevent explosion. If the shot blasting machine takes the explosion-proof measures, the concrete measures are as follows:

(1) .The inner surface of the shot blasting machine dust collector is not painted, the body has the outlet, and the conductive filter bag containing metal wire should be selected on the dust-removing cloth bag. In addition, on the dust pipe, the flange is earthed, and one-way reverse check valve is installed at the inlet side of the duct.

(2) .Grounding treatment of shot blasting machine, dust collector, electrical cabinet, selection of explosion-proof type for fan motor and installation of leakage protector for circuit breakers in various parts.

(3).The edge angle of the bottom of dust collector is greater than 60 degree; dust collector adopts dust discharge valve type no dust accumulation.

How to make the shot blasting machine have a high cleaning effect?

In addition, pulse filter cartridge dust collector is suitable for shot blasting machine? In order to have good cleaning effect of shot blasting machine, we need to do: first, the quality of the equipment should be good, at least the quality should be qualified, second, the shot blasting parameters should be reasonable and appropriate, and the third is the use of the appropriate projectile. To achieve these three points, in order to make the blasting machine has a good cleaning effect. Pulse filter cartridge dust collector, which is suitable for shot blasting machine, and can be matched with various types of shot blasting machine.

How does the shot blasting machine meet environmental protection requirements?

Shot blasting cleaning process produces dust, dust distributed to the workshop air, serious pollution of the surrounding environment. In order to meet the environmental protection requirements, the shot blasting machine is mainly on the part of the dust collector. Specifically, it is necessary to filter material of good quality and not cause environmental pollution, QGMA Machinery filter cartridge adopt the Donaldson technology. The cleaning efficiency can up to 99.9% and the dust removal system can operate normally and stably. In addition, the dust collector should be matched with the shot blasting machine, so that the dust can be recovered well, and then the purpose and requirement of environmental protection can be achieved.

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What cause the blade of the shot blasting machine damage and what is the measures?

QGMA Machinery is a professional shot blasting machine manufacturer of serving customers from 50+ different countries. The blast wheel is the core of the shot blasting machine and the core of blast wheel is the blade. QGMA Machinery made the blades are precision-cast and heat-treated, which greatly extends the service life. The material of the blades is high chrome wear resistant cast iron. It not only can increase the abrasive projectile speed, but also can increase the cleaning efficiency. What will cause the blade of shot blasting machine damage and what is the measure to solve this. Let QGMA Machinery introduce.

What cause the blade of the shot blasting machine damage?

As we all known, the shot blasting machine uses a motor-driven the impeller of the blast wheel to generate centrifugal force and wind during high-speed rotation. The shot blasting volume reaches 200Kg/min when the abrasive entered into the high-speed rotating distributor. Under the action of centrifugal force, the projectile is thrown from the distributor into the control cage.  And then thrown through the control cage (controlled the direction of the abrasive), picked up by the high-speed rotating blade, and continuously accelerated along the length of the blade, throwing out the projectiles to form a certain fan-shaped stream. With 120m/s speed thrown onto the road surface and the surface of the steel plate, and its depth can reach 1-5mm according to the type of abrasive. The convexity and concave are uniform and the impact working plane plays a cleaning and strengthening role.

What cause the blade of the shot blasting machine damage and what is the measures2

When replace the damage blade of shot blasting machine?

The blade of the shot blasting machine is constantly impacted by most of the abrasive thrown out, so the blade is the most vulnerable part of the shot blasting machine. Blade wear or cracking will cause the impeller to vibrate during high-speed rotation. It is found that the blade has deep grooves or more than half of the blade wear should be replaced in time. In addition, the casting defects of the blades will inevitably accelerate the wear of the blades. Because the blades with casting defects will cause the projectiles to bounce during the movement, the bounced projectiles will in turn wash the blades and increase the wear of the blades. In order to ensure the stability of the shot blasting machine, the blades must be replaced in pairs to stop, that is, the blades opposite to the unsuitable blades must be replaced at the same time to achieve a good dynamic balance. If the blade problem of the shot blasting machine causes the blasting head to work abnormally, all blades should be replaced. The blades with casting defects must not be used. When installing the blades, the weight difference of 8 blades in a group shall not exceed 5 grams.

What cause the blade of the shot blasting machine damage and what is the measures1

What the measures to replace the blade of the shot blasting machine?

Open the top guard plate of the blast wheel, take out the fixed guard plate, and take out the blades one by one.

Note:

After using the shot blasting machine, the blade has been fastened to the impeller, and the end of the blade can be tapped lightly, and the blade can be quickly removed by one vibration.

The blades of the shot blasting machine are generally cast with high chromium materials. Do you want to process the blades from plates? If you have to do it, it is recommended to use high manganese steel.

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Steel crawler belt shot blasting machine for pakistani customer

Recently, QGMA Machinery has a set of steel crawler belt shot blasting machine delivery to Pakistan. Customer used the machine to clean some small castings, which after heat treatment with high temperature. The steel crawler belt shot blasting machine can not only remove the rust, oxide scale, sand after casting on the surface of the workpiece, but also reduce the internal stress of the workpiece and improve the fatigue strength of the workpiece. This machine can be used as a stand-alone machine or wired. The crawler-type shot blasting machine has a larger shot blasting volume and better sealing performance than previous cleaning equipment. The cleaning effect, production efficiency and dust removal effect are greatly improved, and the maintenance cost is reduced about 60%.

Steel crawler belt shot blasting machine for pakistani customer 2

The brief introduction of steel crawler belt shot blasting machine.

The steel crawler belt shot blasting machine used to remove the sand, rust, oxide scale, burr on casting, forging, stamping surface. The machine suitable to clean the workpiece surface, which easy to rolling, not afraid to collision and the core not to deep. Some of tools plants, automobile plants, textile plants, heat treatment plants, casting plants and stamping plants are the mainly users of the machine. This kind of machine have the good protective measures, good shot blasting performance, the reasonable abrasive recycle system. It also have the good effective for the workpiece which are difficult to clean.

The steel crawler belt shot blasting machine has automatic fault detection device and adopts advanced Swiss GF technology, so that this machine has the characteristics of advanced structure, reasonable design, reliable operation and high production efficiency. The welding structure of the chamber system is composed of the chamber shell, the roof and the indoor protection. There is a screw conveyor at the bottom of the chamber shell, the inner part is equipped with a crawler belt and its transmission mechanism, the end is equipped with an end disc, the inner part is protected by a wear-resistant protective plate, and the top of the chamber is fixed with a shot blasting device.

In order to further develop the shot blasting device of the crawler shot blasting machine, it is necessary to analyze the shot blasting flow from the beginning of entering the feed system to the exit of the directional sleeve and then thrown by the impeller blades. As a leader in shot blasting technology, DISA has optimized the shot flow through the shot blasting machine and opened the way for a new next-generation shot blasting machine. It is the first company in the world to use high-speed photography technology to achieve such results. On the one hand, this uniform distribution significantly improves the energy utilization during the acceleration of the pellets. On the other hand, it also significantly improves the effectiveness of the abrasive flow on the surface of the workpiece. In the expanded area, density and coverage have also increased considerably.

The shot blasting device of the crawler shot blasting machine has a four-pole motor, a pulley, a belt, and a belt tensioning mechanism. The transmission belt adopts a conventional V-belt, which is convenient for maintenance and replacement. The blade of the shot blasting machine is fixed to the shot blasting machine through the shoulder on the blade. The shot blasting speed on the impeller disk can reach 83 m/min, and the speed of the impeller disk can reach 3000 rpm, which is 15-20% higher than that of ordinary linear blades.

Steel crawler belt shot blasting machine for pakistani customer 1

The feature of the steel crawler belt shot blasting machine:

  1. Torsion-resistant, high-rigidity body shell.
  2. Reasonable chain drive system and geometric movement principle, which ensure that the sturdy, overlapping track shoes always maintain a smooth connection.
  3. High-quality cast chain links have undergone precise machining and partial carburization.
  4. The hardened and ground chain pins still have the smallest tolerance gap after long-term load operation.
  5. Advanced man-machine environment, easy to maintain:
  6. All bearings are installed outside the shot blasting chamber.
  7. All protective plates are installed in a modular manner, which is easy to disassemble and replace and ensures that the shell is not worn by the pill stream.
  8. The upper and lower positions of the material door are controlled by limit switches, and safety limit switches are monitored.
  9. The material door adopts an electric opening and closing door with a compact structure. It is lifted and lowered by the steel wire rope hoisted by the reducer, which is convenient to use, safe and reliable.

Steel crawler belt shot blasting machine for pakistani customer 3

The strength factors of shot blasting machine and whether the blade is easily damaged

The strength factors of shot blasting machine and whether the blade is easily damaged

What are the specific definitions of strength and shot blasting in shot blasting machines?

The concrete definition of strength and shot blasting in shot blasting machine is: strength: in mechanics, the ability of material to resist damage under external force, such as resistance to deformation or fracture, is called strength. Moreover, this performance is one of the basic requirements which must be achieved and satisfied by mechanical parts. Shot blasting: shot blasting treatment is a kind of surface strengthening technology widely used in shot blasting machine. Its advantages are simple equipment, convenient operation and no restrictions on the shape and position of workpiece. The purpose of its application is to improve the mechanical strength, wear resistance, corrosion resistance and fatigue resistance of the parts, and to eliminate the residual stress in the parts.

The strength factors of shot blasting machine and whether the blade is easily damaged 2

What factors will affect the shot blasting strength?

There are some factors affecting the mechanical strength of shot blasting: the size of shot blasting: generally, the larger the shot blasting, the greater the impact kinetic energy and the greater the shot blasting intensity, but the coverage rate of shot blasting will decrease. Therefore, while the shot blasting strength can be guaranteed, the smaller shot blasting can be chosen as far as possible.

However, it is necessary to see whether the shape of the parts is restricted or not. Shot peening hardness: if the shot blasting hardness is higher than the part hardness, the hardness value will not affect the shot blasting strength, on the contrary, the shot blasting hardness is lower than the part hardness, and the shot blasting hardness will reduce the shot blasting strength. Shot blasting speed: increasing shot blasting speed will increase shot blasting strength, but at the same time, it is possible to increase the amount of shot blasting damage. Therefore, we should find a balance between the two to have the appropriate shot blasting speed and good shot blasting effect.

The strength factors of shot blasting machine and whether the blade is easily damaged 3

In shot blasting machine, is the blade easily damaged?

In shot blasting machine, blades are easy to be damaged and also an important part. Therefore, it is necessary to pay attention to and take seriously the vane maintenance work to ensure the normal use of shot blasting machine and have a good use effect. In the specific maintenance, is to use correctly and standardized, and in the blade materials, should use high wear resistant materials, so as to ensure the service life of the blade.

When the shot blasting machine is used as a key component of the shot blasting machine, the quality and service life of the shot blasting machine blade directly depend on the blade. Because the blade is in a high-speed rotating impeller when it is working, it must withstand the wear of steel shot abrasives and the erosion of high-speed shot peening flow. In this wear situation, whether the blade works well depends on the material of the blade. After high chromium wear-resistant cast iron is applied to the blade of the shot blasting machine, the average service life of the blade can reach more than 600 hours. Cooling the surface of the blade with cold iron not only realizes the sequential solidification of the casting, but also produces a dense or even fine grain structure on the surface of the blade. In addition, a reasonable heat treatment process can obviously play the total function of the blade, so that the blade can withstand the repeated impact of steel grit for a long time, show good wear resistance and long service life, and have broad application prospects.

The strength factors of shot blasting machine and whether the blade is easily damaged 1

Application field of shot blasting machine

Application field of shot blasting machine

Nowadays, many industries use the shot blasting machine. The shot blasting machine is not only use in some metal industries, but also can use in construction industries, petroleum industries, natural stone industries, shipyard and ship building, etc. Now let QGMA Machinery introduce the application field of shot blasting machine to you.

what is shot blasting machine

Shot blasting machine is the machine that use the blast wheels projectile the high-speed steel shots to clean or strength the surface of workpieces. Shot blasting machine can remove burring, rusting and oxide scales and increase the adhesion effect between workpiece and coating, so that to achieve the purpose of strengthening the workpiece.

Shot blasting machine is different from the sandblasting machine. The shot blasting machine is used to reduce the fatigue life of workpieces and increase the strengthen of the workpiece or prevent fretting.

Application field of shot blasting machine 1

Scope application of shot blasting machine

  1. Surface cleaning

Shot blasting machine is first used in the foundry industry to remove the sand and oxide scale on the surface of casting steel or casting iron workpieces. Almost of the steel casting, gray casting, malleable iron parts, ductile iron parts need to be blasted. That no only to remove the oxide scale and sand on the surface of casting, but also a necessary process before the quality check of the casting. For example, the large size of the gas turbine engine

must be blasted strictly before the non-destructive inspection, to make sure the inspection result reliability.

In the production of casting, shot blasting is the essential process to find the casting surface defects, as subcutaneous pores, slag holes, sand sticking, cold insulation and peeling.

For non-ferrous metal castings, as the surface cleaning of aluminum alloys, copper alloys etc. Except to cleaning the oxide scale and find the defects of the casting surface. The mainly purpose is adopt to the shot blasting to clean the burrs on the casting surface and obtain decorative surface quality.

In the production of metallurgical, shot blasting or pickling is a method to guarantee high productivity in the mass production of steel to remove the dephosphorization by mechanical and chemical.

In the production of silicon steel plates, stainless steel plates and other alloy steel plates and strips, in the process of cold rolling must be annealed and then shot blasted or pickled to ensure the surface roughness and thickness accuracy of the cold rolled steel plates.

Application field of shot blasting machine 3

  1. Surface strengthening

According to modern metal strength theory, increasing metal inside  dislocation density is the main direction to improve the strength of the metal. Practice has proved that shot blasting is an effective process to increase the metal dislocation structure. This is of great significance to some metals that cannot be hardened by phase transformation (such as martensitic quenching etc) or require further strengthening on the basis of transformation hardening. Aviation, aerospace industry, automobiles, tractors and other parts require lighter weight, but the reliability requirements are getting higher and higher. The important process is to use shot blasting to improve workpiece strength and fatigue strength.

Application field of shot blasting machine 2

 

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What is the difference between sand and shot blasting?

Many customers inquire about QGMA Machinery for the difference between shot blasting machine and sandblasting machine. Here, QGMA Machinery engineer will briefly explain the principle and difference between them. Hope to help all customers.

Principle of shot blasting machine and sand blasting machine

Shot blasting machine

Shot blasting machine is use the high-speed rotating impeller to throw the steel of iron shot to hit the workpiece surface with high-speed and remove the oxide scale on the surface of workpiece. The steel or iron shot hit on the surface at high-speed causing the lattice distortion and deformation of the surface of the workpiece, which increase the surface hardness. It is the method of cleaning the surface of the workpiece. Shot blasting machine is often used to clean the surface of casting or strengthen the surface of the workpiece.

Shot blasting machine is used for clean some regular shaped workpieces. Put several blast wheels around the workpieces. It not only with high efficiency but also with low pollution.

Shot blasting and sand blasting, what is the difference 3

 Sand blasting machine

Sandblasting machine adopt to compressed air as the power to form a high-speed injection beam to spray the workpiece surface, which need to clean. To make the mechanical properties of the outer surface of the workpiece surface are changed. Although there are many type of sandblasting machine, but the ultimate goal is to improve the fatigue resistance of the workpiece, increase the adhesion between it and the coating, prolong the durability of the coating film, and also benefit the leveling and decoration of the coating. To remove the impurities, variegated color and oxide layer on the surface, and also make the surface of the medium rough, eliminate the residual stress of the workpiece and improve the surface hardness of the substrate.

Shot blasting and sand blasting, what is the difference 1

Process is different

Shot blasting and sand blasting can both clean and decontaminate the workpiece. The purpose is to prepare for the next process, that is to ensure the roughness requirements of the next process and some are to achieve surface consistency. The shot blasting have strengthening effect, sandblasting is not obvious. Generally, shot blasting use steel shot and sand blasting use quartz sand.

  1. Shot blasting and sand blasting are both surface treatments, but it does not mean that only castings can use the shot blasting process
  2. The main function of sandblasting is to remove rust and oxide scale on the surface, such as parts after heat treatment and shot blasting has more functions : not only removes rust and oxide scale, but also improves surface roughness and removes parts machining burrs to eliminate internal stress of parts, reduce deformation of parts after heat treatment and improve surface wear resistance and pressure capacity of parts
  3. There are many processes used for sand blasting, such as: castings, forgings, surface treatment of parts after machining, parts after heat treatment etc.
  4. Sand blasting is mainly manual operation, while shot blasting is mostly automated and semi-automated.
  5. The steel shots and iron shots used in shot blasting are not actually shots in the true sense. They are  steel wires or steel rods. After use a period of time it will like the shots. The sandblasting sand  it is just river sand, which is no different from that used for construction, except that the sand blasting is screened, contains less mud, and has a particle size specification. Of course, some industries are also different. For example, the shipbuilding industry uses real steel shots for shot blasting, while sandblasting uses metal ore (not river sand-quartz sand).

Shot blasting and sand blasting media

Shot blasting used the abrasive are generally spherical particles with no edges and corners. Such as steel shots, steel grits, steel wire cut, etc.

Sand refers to sand grains with edges and corners, such as brown corundum, white corundum, river sand, etc.

Shot blasting and sand blasting, what is the difference 2

Shot blasting  is a method of centrifugal force generated when the shot material is rotated at a high speed to impact the surface of the material to achieve removal and a certain roughness.

Sand blasting  uses compressed air as the power to spray sand or steel shots onto the surface of the material to achieve removal and certain roughness.

The main application scope of shot blasting machine is: applicable product industry: automobile, aerospace, computer, communication, home appliances and other 3C industries.

The main scope of application of the sandblasting machine is: applicable product materials: all kinds of rubber (including silica gel), injection molded parts, magnesium alloy, aluminum alloy, zinc alloy and other materials.

Through the above comparison, you can know their differences, so you will have a choice when choosing, mainly based on your actual situation.