CN108705190A - Vacuum high-frequency sensing heating set composite - Google Patents

Abstract

The present invention relates to a kind of vacuum high-frequency sensing heating set composites compound for bimetallic, belong to welding jig field.High-frequency induction heating combination process has simple for process, the series of advantages such as combined efficiency height.The high-frequency induction heating set composite of the present invention includes load coil, sealing container, rollgang, hermatic door and vacuum extractor, sealing container is connected with vacuum extractor, rollgang is disposed in sealing container, it is connected by chain sprocket between the adjacent conveyor roller of rollgang, the load coil is U-shaped structure, it is arranged in the left and right centre position of the sealing container up and down, and it is inserted between the rollgang roller, conveying roll upper level is between U-shaped coil, it is both provided with hermatic door in the sealing container left and right ends.The present invention can efficiently solve the problems such as high-frequency induction heating combination process easy tos produce oxide inclusion and thin built-up welding layer thickness.

Description

Vacuum high frequency induction heating compound device

technical field

The invention relates to a vacuum high-frequency induction heating compound device for bimetal compounding, which belongs to the field of welding equipment.

Background technique

The high-frequency induction heating compounding process is used to compound a layer of wear-resistant materials such as high-chromium cast iron on the tough steel plate. It has a series of advantages such as simple process and high compounding efficiency, so it has been widely used in actual production. However, this process is based on stacking metal powder on the steel plate and compounding it under the condition of high-frequency induction heating. In order to prevent the oxidation of the metal powder particles and increase the electrical conductivity between the powder particles during the compounding process, a large amount of metal powder must be added to the metal powder. The addition of solvents can not completely avoid a large amount of metal powder burning loss, but also increases the possibility of non-metallic inclusions in the surfacing layer during the composite process, reducing the structure and performance of the composite layer. In addition, due to the specific gravity of the solvent compared to Because the metal powder is much smaller, the overall specific gravity of the composite powder is reduced. When compounding narrow and small workpieces, the thickness of the composite powder pre-stacked on the surface of the workpiece is low, resulting in the thickness of the composite wear-resistant layer after compounding. Lower, reducing the overall wear resistance of the composite workpiece.

In the process of high-frequency compounding, manual operation is mainly used at present. Manual operation is inefficient, labor-intensive, unstable, and prone to quality defects during the compounding process.

The above-mentioned problems in the high-frequency composite process have seriously affected the application of this process in actual production, so a more effective process must be found to solve it.

Contents of the invention

The object of the present invention is to provide such a vacuum high-frequency induction heating composite device, which can effectively solve the aforementioned problems in the high-frequency composite process.

The purpose of the present invention is achieved in this way: a vacuum high-frequency induction heating composite device for producing bimetallic composite workpieces, including induction heating coils, sealed containers, conveying rollers, sealed doors and vacuuming devices, the vacuuming The device is connected to a sealed container through a pipeline, and a conveying roller table is arranged in the sealed container. It is connected with the coupling and the rotary drive device, the transmission shaft passes through the wall of the sealed container, and a sealing ring is arranged at the contact part with the wall, and the induction heating coil is a U-shaped structure, arranged up and down on the sealing The left and right middle positions of the container are inserted between the conveying rollers, the upper surface of the conveying roller is located between the U-shaped coils, the induction heating coil passes through the wall of the sealed container, and is connected to the outside of the sealed container The cooling water system is connected to the induction heating power supply, the induction heating coil and the wall of the sealed container are sealed with sealant, and the left and right ends of the sealed container are opposite to the conveying roller. A transparent sealed observation window is arranged on the wall of the container.

The conveying rollers of the conveying roller table are arranged symmetrically at the left and right ends of the induction heating coil.

The sealed door is composed of a sealed door panel, a lateral pressurizing device, a door guide groove, a seal and an inlet and outlet. The door panel is pressed against the seal, closing the entrance and exit.

There is a wedge-shaped block on the sealed door plate, and the upper part is connected with the driving cylinder, and the driving cylinder is fixed on the sealed container. The lateral pressure device includes a guide post frame with a guide post hole, a spring and a guide post. The guide post frame is connected to the side of the airtight container, the spring is placed in the guide post hole, one end of the guide post is in contact with the spring, and the other end extends out of the guide post hole and is opposite to the sealed door panel.

The sealing member is a structure with a protrusion, and the protrusion is snapped into a sealing groove provided on the wall of the sealed container.

On both sides of the sealing door of the sealed container, conveying rollers are arranged, and the conveying rollers of the conveying rollers are connected by a sprocket chain mechanism, and their height and specifications are consistent with the height and specifications of the conveying rollers in the sealed container.

The induction heating coil is mounted on a sealing plate, the sealing plate is made of non-magnetic material, and is pressed onto the sealed container by bolts, and a gasket is arranged between the sealing plate and the side wall of the sealed container.

Rollers are installed at one end of the guide post protruding from the guide post hole.

The installation height of the guide column frame ensures that when the sealed door panel rises to the highest position, the rollers are completely separated from the wedge-shaped block on the sealed door panel; Make sure to compress the seal by at least 2~4mm.

An air filter device is arranged on the connecting pipeline between the vacuum device and the sealed container, and the air filter device uses a filter cloth for filtering, and the size of the filter cloth filter holes is smaller than the particle size of the high-frequency composite metal powder.

Since high-frequency induction heating compounding is carried out in a sealed container, during the compounding process, a vacuum device is used to evacuate the sealed container, so that the entire compounding process is carried out in a state close to vacuum, and the oxygen content in the compounding environment is greatly reduced, effectively Reduce the degree of metal powder particles being oxidized by oxygen in the air during the composite process, which can greatly reduce the solvent content in the composite powder, and solve the problem of a large number of non-metallic inclusions in the metal composite layer and the thickness of the composite layer is small during the composite process , has very obvious advantages.

Since the entire compounding process is carried out in a sealed container, manual direct operation is very troublesome. For this reason, a conveying roller table is set in the sealed container, and the workpieces to be compounded and compounded are placed on the roller table roller, and the roller adopts a rotary drive device. Carry out driving rotation, drive the workpiece to move steadily and uniformly, not only solve the problems of low manual compounding efficiency, high labor intensity, and unstable compounding quality, but also solve the problem of workpiece transmission in the sealed container. The slewing drive device is placed outside the sealed container to facilitate its maintenance. It is connected to the rollers of the roller table through a coupling and a connecting shaft. In order to ensure the sealing performance of the sealed container, the connecting shaft is provided with a Gasket. In order to reduce the number of slewing drive devices, sprockets of the same specification are set on the rollers of the roller table, and the sprockets on adjacent rollers are connected by chains, which can ensure that the rollers rotate in the same direction at the same speed, and the workpiece can be transported smoothly. Stability has very obvious advantages.

The induction heating coil has a U-shaped structure, arranged up and down in the left and right middle positions of the sealed container, and inserted between the conveying rollers. The upper surface height of the conveying roller is located between the U-shaped coils, which can ensure the composite workpiece It is sent into the U-shaped induction heating coil coil by the conveying roller for heating. The induction heating coil passes through the wall of the sealed container, and is connected with the cooling water system and the induction heating power supply outside the sealed container, so as to facilitate the arrangement and maintenance of the induction heating power supply and the cooling water system. In order to ensure the sealing performance of the airtight container, a sealant is used for sealing between the induction heating coil and the wall of the airtight container.

The roller table rollers are symmetrically arranged at the left and right ends of the induction heating coil, and the number of composite workpieces pre-placed on the conveying end and the output end that has been composited can be balanced left and right, reducing the number of opening and closing of the entrance and exit of the sealed container, and improving the efficiency of the composite process. Advantages obvious.

In order to ensure that the composite workpiece enters and exits the airtight container smoothly, an inlet and outlet are provided on the left and right sides of the airtight container. On the wall of the sealed container around the inlet and outlet, seals are set, and the position corresponding to the inlet and outlet is set with a sealing pressure plate. The sealing pressure plate can cover and compress the sealing material, so that the left and right movement of the sealing pressure plate during the compounding process will The inlet and outlet are closed, sealed and opened, so that the composite process is carried out in a sealed state. After the composite operation is completed, the inlet and outlet are opened to release the seal, so that the workpiece can enter and exit the sealed container smoothly. Through the setting of the sealing pressure plate, the problem of the workpiece sealing compound and the smooth entry and exit of the sealed container under the non-vacuum state is successfully solved, and the structure is simple and the performance is reliable.

Set the guide post frame on the side of the inlet and outlet, set the guide hole on the guide post frame, place the spring in the bottom of the guide hole, set the guide post in front of the spring, set the roller at the end of the guide post, and set the wedge block at the position corresponding to the sealing plate and the roller , the sealing platen is connected with the oil cylinder and can move up and down. When sealing is required for compounding, the oil cylinder pushes down the sealing pressure plate. During this process, the wedge-shaped block on the sealing pressure plate first contacts the roller, and pushes the guide column connected with the roller to the direction where the spring is placed, and the spring moves toward the wedge-shaped block and The sealing pressing plate exerts a certain pressure, and the sealing pressing plate is pressed against the sealing member on the wall of the sealed container to seal the inlet and outlet. Since the sealing pressure plate is subjected to the suction force inside the sealed container during the vacuum generation process, the pressure generated by the wedge-shaped block does not need to be too large to ensure the smooth sealing of the inlet and outlet during the vacuuming process. During the moving process, the distance to compress the seal is set between 2~4mm. This compression distance can not only ensure the original sealing condition requirements during vacuuming, but also avoid excessive compression of the seal and reduce the service life of the seal. After the workpieces are compounded under the vacuum state, the vacuum state of the sealed container is released, the sealing platen is lifted up by the oil cylinder, and the inlet and outlet are opened, and the workpieces can be sent in and out. Due to the structure of rollers and spring pressure, it can greatly reduce the sliding friction force on the sealing platen when it moves up and down, which facilitates the opening and closing of the inlet and outlet, and is beneficial to the sealing of the sealing platen and the release of the seal.

Due to the large frictional force between the sealing platen and the sealing member when the sealing plate moves up and down, if the sealing member is not installed firmly on the wall of the sealed container, the position of the sealing member may change under the action of the frictional force. May cause seal failure. For this reason, a protrusion is provided on the seal, and the protrusion is installed in the groove provided on the wall of the sealed container, which can effectively prevent the change of the position of the seal caused by friction during the movement of the sealed door plate up and down, and ensure The reliability of the sealing of the whole device.

For workpieces of different sizes and shapes, induction heating coils of different sizes and shapes are required, so the induction heating coils need to be replaced frequently. To this end, a sealing plate is made of non-magnetic material, the induction heating coil is fixed on the sealing plate, and the induction heating coil and the sealing plate are bonded and sealed with a sealant. The sealing plate is connected to the airtight container by bolts, and a gasket is used to seal the space between the sealing plate and the airtight container. This structure facilitates the replacement of the induction heating coil, and can avoid the problem of needing to replace the sealed container as a whole when replacing the induction heating coil. Since a certain induction current needs to be generated between the induction heating coils, the sealing plate is made of non-magnetic material, which can prevent the eddy current in the sealing plate from causing its temperature to rise and damage the sealing plate and gasket during the compounding process of the workpieces, which has obvious advantages.

In the process of picking and placing the workpiece, if the composite workpiece is manually put into and taken out of the sealed container, due to the limitation of the space position, this operation is very inconvenient and will seriously reduce the efficiency of the composite production process. For this reason, on both sides of the sealing door of the sealed container, conveying rollers are also arranged, and the rollers of the conveying rollers are also connected by a sprocket chain mechanism. The specifications are consistent, so that in the compound production process, the workpiece to be compounded can be placed on the conveying roller table in advance, and the compounded workpiece can also be directly conveyed to the other side by the conveying roller table in the sealed container after the compounding is completed. On the conveying roller table, it is convenient to pick and place the workpiece, which has obvious advantages.

According to needs, the conveying roller table on the side where the uncompounded workpieces are placed can be set longer, which can increase the number of uncomposited workpieces and reduce the troublesome degree of operation. The length of the conveying roller table at one end of the conveying composite workpiece can be shorter, and a storage box can be set at the end of the roller table, and the composite workpiece can be directly sent into the storage box, and then collected and cleaned regularly.

Due to the small particle size of the metal powder used in high-frequency induction compounding, generally less than 200 mesh, small particles of metal powder are easy to enter the vacuum device during the vacuuming process and damage the vacuum device. For this reason, an air filter device is installed between the vacuum device and the pipeline of the sealed container. The air filter device uses a filter cloth to filter the air. The size of the filter cloth filter hole is smaller than the particle size of the composite powder, which can effectively prevent the composite process. The medium composite powder enters the vacuum device, which protects the vacuum device.

Description of drawings

Fig. 1 and Fig. 2 show the structural diagram of the specific embodiment of the present invention.

specific embodiment

Fig. 1 and Fig. 2 show the specific embodiment of the present invention, and Fig. 1 shows the sectional view of BB position among Fig. 2, and Fig. 2 shows the sectional view of A-A position among Fig. 1.

The meanings of the serial numbers of the parts in Figure 1 and Figure 2 are as follows: 1. Conveying roller; 2. Spring; 3. Guide column frame; 4. Roller; 5. Oil cylinder; 6. Oil cylinder bracket; block; 9. seal; 10. vacuum gauge; 11. induction heating coil; 12. vacuum device; 13. sealed container; 14. guide post; 15. compounded workpiece; 16. pending compounded workpiece; ;18, sprocket; 19, motor; 20, coupling; 21, connecting shaft; 22, sealing ring; 23, chain; 24, sealant; 25, cover plate; 26, bolt; 27, cooling water system; 28. Induction heating power supply; 29. Roller seat; 30. Transparent observation window; 31. Import and export; 32. Filter cloth; 33. Air filter device.

A vacuum device is installed on the sealed container to generate a vacuum in the sealed container, and the vacuum gauge can display the vacuum degree in the sealed container to ensure that the composite process is carried out under a certain vacuum degree. A conveying roller table is installed in the sealed container, and one of the conveying roller table rollers is driven to rotate by a motor through a coupling and a connecting shaft. The connecting shaft passes through the wall of the sealed container, and a sealing ring is used for sealing between the two. The rollers of the conveying roller table in the container are arranged symmetrically at both ends of the induction heating coil, and the adjacent rollers are connected by a sprocket chain structure. The structural dimensions of all the sprocket chains are the same to ensure that all rollers are Synchronously rotate in the same direction.

The induction heating coil has a U-shaped structure, arranged up and down in the left and right middle positions of the sealed container, and inserted between the conveying rollers. The upper surface height of the conveying roller is located between the U-shaped coils, which can ensure the composite workpiece It is sent into the U-shaped induction heating coil coil by the conveying roller for heating.

The induction heating coil is worn on the sealing plate, and the sealant is used for sealing between the two. The sealant is a high-temperature-resistant sealant to ensure that it can bear the temperature generated during the working process of the induction heating coil. The sealing plate is installed on the wall of the airtight container with bolts, which can be easily disassembled. A gasket is arranged between the sealing plate and the wall to ensure the airtight performance of the airtight container. The induction heating coil is respectively connected to the induction heating power supply and the cooling water system outside the sealed container, wherein the cooling water circulates through the holes inside the induction heating coil to ensure that the temperature of the induction heating coil is kept at a low level.

On the left and right sides of the sealed container, there are inlets and outlets, corresponding to the positions of the inlets and outlets, there are sealed door panels, and the sealed door panels are installed in the guide door grooves to ensure that the swing distance of the sealed door panels is within a certain range. The top of the sealing door plate is connected with an oil cylinder, the oil cylinder is installed on the oil cylinder support, the support is installed on the airtight container, and the oil cylinder can move the sealing door plate up and down. A wedge-shaped block is connected to the sealing door panel, and a sealing door panel pressing device is installed on the outer layer of the sealing door panel. The sealing door panel pressing device is composed of a spring, a guide post frame, and a guide post. The spring is installed in the guide post hole set on the guide post frame. Inside, the guide post is also inserted into the guide post hole, one end is connected with the spring, the other end extends out of the guide post hole, the end is equipped with rollers, and the whole guide post frame is connected to the airtight container. The installation height of the guide column frame ensures that when the sealing door panel rises to the highest position, the rollers are completely separated from the wedge-shaped block on the sealing door panel; On the block, and ensure that the seal is compressed by about 3mm, the amount of compression can ensure the initial sealing requirements when the sealed container is evacuated.

On the left and right sides outside the sealed container, there are conveyor rollers. The left and right conveyor rollers are equipped with a rotary drive system separately, and each uses a sprocket chain to connect the rollers of the adjacent rollers to ensure that the workpieces to be compounded and compounded are inside and outside the sealed container. The smooth transshipment improves compound efficiency.

On the wall of the sealed container, there is an observation window made of transparent glass fiber reinforced plastic, through which the process of compounding can be watched and monitored, and accidents in the process of compounding can be found in time.

When carrying out composite work, first place the workpiece to be composited on the conveying roller table on the right, then start the motor, and the conveying roller table will rotate, and the workpiece to be composited will be sent into a sealed container, close to the position of the induction heating coil. Make the oil cylinder move and push down the sealing door panel. During this process, the wedge-shaped block on the sealing door panel contacts the roller at the end of the guide column and is pressed to the sealing element, compressing the sealing element by 3mm at the lowest position to ensure the entrance and exit. Position sealing performance. Then vacuumize. When the vacuum degree displayed by the vacuum gauge meets the requirements, turn on the cooling water and the induction power supply, start the rotation of the conveying roller again, and send the workpiece to be compounded into the induction heating coil at a uniform speed for heating. The wear-resistant composite powder deposited on the steel plate of the workpiece is melted and compounded on the steel plate. Adjust the conveying speed of the conveying roller according to the speed of workpiece heating and compounding. After the compound operation is completed, stop the conveying roller table, remove the vacuum in the sealed container, then lift the oil cylinder up, open the left and right inlets and outlets, and start the conveying roller table again, and the compounded workpiece can be sent out of the sealed container to complete the workpiece compound production operations.

In order to reduce the number of opening and closing of the entrance and exit and the sealing door, the length of each conveying roller table can be lengthened, and several workpieces can be placed on it at a time, so that several workpieces can be produced continuously. At the same time, when starting continuous production, the feeding and Sending out the workpiece once can also reduce the opening times of the inlet and outlet and the sealing door.

An air filter device is arranged on the pipeline between the vacuum device and the sealed container, and the air filter device uses a filter cloth for filtering, and the size of the filter hole of the filter cloth is smaller than the particle size of the composite powder. The particle size of the alloy particles of the composite powder in the embodiment of the present invention is 200 mesh, and the filter cloth used has a filter hole size of 320 mesh, which can ensure the filtration of composite powder dust generated during the composite process and protect the vacuum pump from damage.

Claims (10)

1. A vacuum high-frequency induction heating composite device for producing bimetallic composite workpieces, comprising induction heating coils, sealed containers, conveying rollers, sealed doors and vacuum pumping devices, characterized in that: the vacuum pumping devices pass through tubes The road is connected to the sealed container, and a conveying roller table is arranged in the sealed container. The adjacent conveying rollers of the conveying roller table are connected by chain sprockets of the same specification, and the conveying rollers pass through the transmission shaft and coupling The device is connected with the rotary drive device, the transmission shaft passes through the wall of the sealed container, and a sealing ring is provided at the contact part with the wall, and the induction heating coil is a U-shaped structure, arranged up and down on the left and right sides of the sealed container middle position, and inserted between the conveyor rollers, the upper surface height of the conveyor rollers is located between the U-shaped coils, the induction heating coil passes through the wall of the sealed container, and is connected with the cooling water system outside the sealed container It is connected with the induction heating power supply, and the sealant is used to seal between the induction heating coil and the wall of the sealed container. There are sealed doors at the left and right ends of the sealed container opposite to the conveying rollers. A transparent sealed observation window is provided on the wall. 2. The vacuum high-frequency induction heating composite device according to claim 1, characterized in that: the conveying rollers of the conveying roller table are arranged symmetrically at the left and right ends of the induction heating coil. 3. The vacuum high-frequency induction heating compound device according to claim 1, characterized in that: the sealed door is composed of a sealed door panel, a lateral pressurizing device, a guide door groove, a seal and an inlet and outlet, and the sealed door panel Inserted in the guide door groove, the lateral pressurizing device can pressurize the sealing door panel, press the sealing door panel on the sealing member, and close the inlet and outlet. 4. The vacuum high-frequency induction heating compound device according to claim 3, characterized in that: there is a wedge-shaped block on the sealed door panel, the upper part is connected with the driving cylinder, and the driving cylinder is fixed on the sealed container, and the side The pressurizing device includes a guide post frame with a guide post hole, a spring and a guide post, the guide post frame is connected to the side of the sealed container, the spring is placed in the guide post hole, and one end of the guide post is connected to the spring contact, the other end protrudes from the hole of the guide post and is opposite to the sealed door panel. 5. The vacuum high-frequency induction heating composite device according to claim 3, characterized in that: the sealing member is a structure with a bump, and the bump is snapped into the sealing groove provided on the wall of the sealed container Inside. 6. The vacuum high-frequency induction heating compound device according to claim 2, characterized in that: on both sides of the sealed container sealing door, there are conveying rollers, and a sprocket chain mechanism is used between the conveying rollers on the conveying rollers Connection, its height and specifications are consistent with the height and specifications of the conveying roller table in the sealed container. 7. The vacuum high-frequency induction heating compound device according to claim 1, characterized in that: the induction heating coil is mounted on a sealing plate, and the sealing plate is made of non-magnetic material, and is pressed into the sealing plate by bolts. On the container, a sealing member is arranged between the sealing plate and the side wall of the sealed container. 8. The composite device for vacuum high-frequency induction heating according to claim 4 or 5, characterized in that a roller is installed at the end of the guide post protruding from the guide post hole. 9. The vacuum high-frequency induction heating compound device according to claim 8, characterized in that: the installation height of the guide column frame ensures that when the sealed door panel rises to the highest position, the rollers are completely separated from the wedge-shaped block on the sealed door panel , and when the sealing door panel is lowered to the lowest position, the roller can also press on the wedge block and ensure that the sealing element is compressed by at least 2~4mm. 10. The vacuum high-frequency induction heating compound device according to claim 1, characterized in that: an air filter device is provided on the connecting pipeline between the vacuum device and the sealed container, and the air filter device uses a filter cloth to filter, The size of the filter holes of the filter cloth is smaller than the particle size of the high-frequency composite metal powder.