A vacuum laser welding machine

Abstract

A vacuum laser welding machine relates to the field of mechanical manufacturing and processing technology, including a welding platform assembly, a workpiece loading and unloading and vacuuming mechanism and a laser welding mechanism, wherein the workpiece loading and unloading and vacuuming mechanism includes at least one loading and unloading device for clamping the workpiece and at least one vacuuming device for providing a vacuum environment for vacuum welding, wherein the bottom of the loading and unloading device is installed on the welding platform assembly, the loading and unloading device is used to clamp and position the workpiece, and the vacuuming device is provided with an openable and closable welding working cavity, when the loading and unloading device enters the welding working cavity and reaches the workpiece welding position, the welding working cavity is sealed, and the vacuuming device vacuumizes the welding working cavity. The present invention can provide a vacuum laser welding machine for vacuum welding of larger mechanical parts, which has a compact structure, continuity, high speed, low equipment loss, strong versatility, reliable operation, and low manufacturing cost.

Description

Technical Field

[0001] The present application relates to the technical field of mechanical manufacturing and processing, and in particular to a vacuum laser welding machine. Background Art

[0002] In the field of mechanical manufacturing and processing, with the further development of welding technology, laser welding and electron beam welding have been developed, and welding robots have been widely used in industrial production. In particular, laser welding has high power density, fast energy release, and its own smaller focal point, which makes the adhesion between the welded materials after melting better, and will not cause damage and deformation of the materials, thereby better improving work efficiency. However, for some parts with extremely high precision requirements in the electronics, shipbuilding, and automobile industries, especially the aerospace industry, the conventional laser welding process is completed in the air, which not only loses some energy, but also requires the use of shielding gas, which affects the quality and performance of the weld and cannot meet the requirements. The vacuum electron beam welding gun body is large in size and heavy in weight, which is not convenient for flexible processing. No shielding gas is required for vacuum laser welding, there is no spatter during welding, and it has a deeper welding depth and a more uniform weld. The existing vacuum laser welding equipment at home and abroad is small in size, suitable only for laboratory use, and expensive, limiting its scope of application. When welding larger mechanical parts, the mechanical parts need to be clamped and positioned, and the entire welding environment needs to be evacuated. The existing devices will cause the positioned workpiece to shift during the vacuuming process, directly affecting the welding quality.

[0003] The above-mentioned related prior art has the following defects: the existing vacuum welding equipment is small in size, only suitable for laboratory use, and expensive, and its application scope is limited, which does not meet the process requirements of vacuum welding processing. Summary of the invention

[0004] In order to improve the existing vacuum welding equipment in the prior art, which is small in size, only suitable for laboratory use, and expensive, and has a limited application range and does not meet the process requirements of vacuum welding processing, the present application provides a vacuum laser welding machine. The following technical solutions are adopted:

[0005] A vacuum laser welding machine comprises a welding platform assembly, a workpiece loading and unloading and vacuum pumping mechanism and a laser welding mechanism, wherein the workpiece loading and unloading and vacuum pumping mechanism comprises at least one loading and unloading device for clamping the workpiece and at least one vacuum pumping device for providing a vacuum environment for vacuum welding, wherein the bottom of the loading and unloading device is installed on the welding platform assembly, the loading and unloading device is used to clamp and position the workpiece, the vacuum pumping device is provided with an openable and closable welding working cavity, and the top of the welding working cavity is provided with a laser protection device for laser beam transmission, when the loading and unloading device enters the welding working cavity and reaches the workpiece welding position, the welding working cavity is sealed, and the vacuum pumping device vacuum pumps the welding working cavity, and the laser welding mechanism comprises at least one laser welding machine, and the laser beam emitted by the laser head of the laser welding machine penetrates the laser protection device on the top of the welding working cavity to complete the laser welding of the workpiece under the vacuum environment.

[0006] By adopting the above technical solution, the workpiece is placed on the loading and unloading device for clamping and positioning. The loading and unloading device carries the workpiece into the welding working chamber of the vacuum pumping device to reach the welding position of the workpiece. The welding working chamber is sealed, and the vacuum pumping device vacuumizes the welding working chamber. The laser beam emitted by the laser head of the laser welding machine penetrates the laser protection lens on the top of the welding working chamber to complete the laser welding of the workpiece in a vacuum environment.

[0007] Optionally, the workpiece loading and unloading and vacuum pumping mechanism includes a loading and unloading device and a vacuum pumping device, the loading and unloading device includes a power slide and a workpiece clamping device, the track of the power slide is fixedly mounted on the upper surface of the welding platform assembly, the workpiece clamping device is mounted on the slider of the power slide and moves with the slider, the vacuum pumping device is fixedly mounted on the upper surface of the welding platform assembly, the vacuum pumping device and the loading and unloading device form a closed welding working chamber, when the loading and unloading device transports the workpiece into the welding working chamber and arrives at the welding station, it is fixed, the vacuum pumping device pumps the welding working chamber into a vacuum environment, and during the vacuum pumping process, the position of the workpiece on the loading and unloading device remains fixed.

[0008] By adopting the above technical solution, the workpiece is placed on the workpiece clamping device and clamped in position, the power slide is started, and the slider of the power slide drives the workpiece clamping device and the workpiece to be transported to the vacuum device. The vacuum device and the loading and unloading device form a closed welding operation chamber. At this time, the workpiece arrives at the welding position, the position of the loading and unloading device is fixed, and the vacuum device draws the welding operation chamber into a vacuum environment. During the vacuum process, the position of the workpiece on the loading and unloading device remains fixed.

[0009] Optionally, the loading and unloading device includes a tank cover assembly, a screw lifting slide, a limiting slide, a support seat, a workpiece support seat, a positioning spring, a fixture for clamping the workpiece and a workpiece adapter plate. The tank cover assembly is provided with a tank cover plate, the bottom of the tank cover assembly is installed on the slider of the power slide, the track of the screw lifting slide is fixedly installed on the tank cover plate, the upper surface of the support seat is provided with at least one spring stopper, the spring stopper is provided with a through hole, one side of the support seat is installed on the slider of the screw lifting slide and moves up and down with the slider, the track of the limiting slide is installed on the upper surface of the support seat, one side of the workpiece support seat is provided with a collision block for positioning the workpiece support seat in a horizontal position, and the other side is provided with at least one spring guide column for maintaining the horizontal position of the workpiece support seat, the bottom of the workpiece support seat is installed on the slider of the limiting slide, the spring guide column is sleeved with a positioning spring, and passes through the spring guide column The through hole on the spring stop block and moves horizontally under the guidance of the through hole, the bottom of the clamp is installed on the upper surface of the workpiece support seat and moves with the workpiece support seat, the workpiece adapter plate is used to position and clamp the workpiece to be welded, and the workpiece adapter plate can be detachably installed on the positioning element of the clamp, the vacuum device includes a tank assembly, a limit block, a sealing ring, a vacuum pump and a pneumatic high vacuum ball valve, one side of the tank assembly is provided with an open end face for matching the tank cover plate, the open end face is provided with a groove for assembling the sealing ring, the tank assembly is provided with at least one lens mounting port and a vacuum port for assembling a laser protection lens, the limit block is adjustably installed on the inner wall of the tank assembly and faces the open end face, the sealing ring is assembled in the groove on the open end face of one side of the tank assembly, and the vacuum pump is sealed and connected to the vacuum port of the tank assembly through a pipeline and a pneumatic high vacuum ball valve.

[0010] By adopting the above technical solution, a contoured portion for matching the workpiece to be welded is provided on the workpiece adapter plate, and the workpiece adapter plate can be flexibly replaced according to different workpieces. The workpiece to be welded is placed on the contoured portion of the workpiece adapter plate, and the workpiece and the contoured portion fit tightly to ensure more reliable clamping. The fixture is started, and the clamping portion of the fixture is started to clamp the workpiece on the workpiece adapter plate to complete the clamping of the workpiece. The screw lifting slide can be hand-cranked or electric. The screw lifting slide is started, and the slider drives the support seat and the workpiece clamped thereon to move up and down and adjust to the process setting position and then stop. The screw lifting slide has a self-locking function, and the position of the support seat is fixed;

[0011] The power slide starts, and the slider of the power slide drives the loading and unloading device and the workpiece to move toward the vacuum device. When the tank cover plate contacts the sealing ring installed on the open end face of one side of the tank body assembly, the tank cover plate and the inside of the tank body assembly form a welding operation cavity isolated from the outside world. At this time, the collision block on one side of the workpiece support seat abuts against the limit block in the tank body assembly to ensure that the relative distance between the workpiece and the tank body assembly is fixed. At the same time, the spring guide column on the other side of the workpiece support seat is inserted into the through hole of the spring stopper, and the spring is compressed. The vacuum pump starts and the pneumatic high vacuum is operated. The ball valve is opened, and the vacuum pump evacuates the welding operation chamber. Due to the effect of atmospheric pressure, the tank cover is pressed against the open end face of the tank assembly. In order to ensure the sealing, a flexible sealing ring is used for the sealing ring. At this time, the sealing ring is compressed. Since the collision block and the limit block are in hard contact, when the sealing ring is deformed, the other side of the workpiece support seat will further compress the spring. The deformation of the spring compensates for the deformation of the sealing ring. During the entire vacuuming process of the packaging, the position of the workpiece support seat on the support seat remains fixed, thereby ensuring that the position of the workpiece clamped on the fixture remains unchanged.

[0012] Optionally, when the collision block on the workpiece support seat is in hard contact with the limit block, the side surface of the tank cover plate contacts the sealing surface of the sealing ring, and the positioning spring is in a compressed state.

[0013] By adopting the above technical solution, it is ensured that the deformation of the spring can compensate for the deformation of the sealing ring during vacuuming, thereby ensuring that the tank cover is pressed against the open end surface of one side of the tank body assembly during vacuuming.

[0014] Optionally, the laser welding mechanism includes at least one set of laser welding devices and laser protection devices, the laser welding device includes a power cross slide and a laser welding machine, the track of the power cross slide is fixedly mounted on the welding platform assembly through a frame, and is located on one side of the workpiece loading and unloading and vacuum pumping mechanism, the base of the laser welding machine is mounted on the slider of the power cross slide, the laser protection device includes a laser protection lens mounting plate, a laser protection lens and an accordion cover, the laser protection lens mounting plate is provided with a lens mounting position, the laser protection lens mounting plate is fixedly mounted at the lens mounting port on the tank assembly, the laser protection lens is fixedly mounted at the lens mounting position of the laser protection lens mounting plate, one end of the accordion cover is connected to the lens mounting port of the tank assembly, and the other end is connected to the laser head housing of the laser welding machine; preferably, the laser welding device and laser protection device are two sets, and the two sets of laser welding devices and laser protection devices are respectively arranged on the top and one side of the welding operation chamber.

[0015] By adopting the above technical solution, the powered cross slide is started, and the slider drives the laser welding machine installed thereon to complete the lateral and longitudinal movement and position adjustment, so that the laser head of the laser welding machine is aligned with the laser protection lens. After the laser protection lens mounting plate and the laser protection lens are installed, the welding operation chamber is sealed. The laser protection lens ensures that during the welding process, the laser emitted by the laser head of the laser welding machine can be projected into the welding operation chamber to weld the workpiece.

[0016] Optionally, at least one water inlet and a water outlet are provided on the side of the laser protection lens, and a lens transmission part for laser focusing transmission, a lens mounting part for installation and a water cooling channel for cooling the lens transmission part are provided inside. The lens transmission part and the lens mounting part are combined into a laser protection lens, and the lens transmission part is located on one side of the center of the laser protection lens, and a group of mounting holes are respectively provided on the outer side of the lens mounting part and on one side surrounding the lens transmission part, and the two ends of the water cooling channel are respectively connected to the water inlet and the water outlet.

[0017] By adopting the above technical scheme, during the vacuum laser welding process, the water cooling channel of the laser protection lens is connected to the external water cooling circulation device through the water inlet and the water outlet, so as to cool and dissipate the heat of the lens transmission part of the laser protection lens, thereby greatly increasing the service life of the laser protection lens; and the lens transmission part is eccentric with respect to the lens mounting part of the laser protection lens. When different workpieces need to be welded, the entire laser protection lens is flipped and installed to meet the welding process requirements of different workpieces.

[0018] Optionally, the workpiece loading and unloading and vacuum pumping mechanism also has at least one set of tank cover clamping assembly, the tank cover clamping assembly includes a rotary clamping cylinder and a cylinder mounting seat, the cylinder mounting seat is fixedly mounted on the top of the tank cover plate, and the cylinder body of the rotary clamping cylinder is mounted on the cylinder mounting seat, when the tank cover plate and the tank body assembly are closed, the rotary pressing gripper of the rotary clamping cylinder presses the tank cover plate and the tank body assembly.

[0019] By adopting the above technical scheme, when the tank cover plate is pressed against the sealing ring at the side open end face of the tank body assembly, the rotary pressing cylinder is started, and the rotary pressing head of the rotary pressing cylinder rotates downward by degrees, and then the piston rod is retracted. The rotary pressing head presses the side open end face of the tank body assembly and the tank cover plate, and then the vacuum pump is turned on to draw the vacuum. Such an arrangement can greatly shorten the vacuum pumping time, reduce energy consumption and improve efficiency.

[0020] Optionally, the workpiece loading and unloading and vacuum pumping mechanism also has a tank cover detection device, which is composed of at least two sets of photoelectric switch components. The photoelectric switch components are adjustably mounted on the welding platform assembly through a mounting plate and are located on one side of the loading and unloading device for detecting the position of the tank cover plate.

[0021] By adopting the above technical solution, when the photoelectric switch assembly passes toward the detection tank cover plate, the detection tank cover plate blocks the photoelectric switch assembly, thereby detecting the position of the tank cover plate.

[0022] Optionally, the screw lifting slide of the workpiece clamping device is a screw lifting slide with a self-locking mechanism.

[0023] By adopting the above technical solution, the screw lifting slide is provided with a self-locking mechanism. When the screw of the screw lifting slide stops rotating, the position of the slider is automatically locked due to the self-locking mechanism, ensuring that the position of the support seat installed thereon is fixed.

[0024] Optionally, the workpiece clamping device also has a workpiece position locking assembly, which includes at least one locking plate and a locking bolt. The locking plate is provided with at least one row of locking holes for matching and inserting the locking bolts. The locking plate is fixedly mounted on the tank cover plate and is located on one side of the screw lifting slide track. When the workpiece arrives at the set welding station, the locking bolt is inserted into the locking hole of the locking plate to complete the mechanical positioning and locking of the workpiece clamping device.

[0025] By adopting the above technical solution, when the screw of the screw lifting slide stops rotating and the workpiece reaches the set welding station height, the locking bolt is inserted into the locking hole of the locking plate to complete the mechanical positioning and locking of the workpiece clamping device, and a mechanical locking is added to the self-locking mechanism of the screw lifting slide to ensure that the position of the workpiece remains unchanged during the welding process, thereby ensuring that the entire welding is completed with high quality.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. The present invention can provide a vacuum laser welding machine for vacuum welding of larger mechanical parts, which has a compact structure, low manufacturing cost, continuity, high speed, low equipment loss, strong versatility, and stable and reliable operation.

[0028] 2. Set up the workpiece adapter plate. For processing workpieces of different specifications, use corresponding adapter plates. When changing the type of workpiece, you only need to replace the corresponding adapter plate, which greatly improves the versatility of the entire vacuum laser welding machine.

[0029] 3. A spring structure is provided on the tank assembly of the present invention, and the displacement of the spring automatically compensates for the compression deformation of the sealing ring during vacuuming, so that the workpiece is always kept in a fixed position.

[0030] 4. The laser protection lens mounting plate is provided with water cooling and eccentric structure. The laser protection lens mounting plate is used to pass cooling water to cool the laser protection lens to extend the life of the laser protection lens. The setting of the eccentric structure can adapt to the doubling of the number of workpiece types when the laser protection lens mounting plate is turned 180 degrees for installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the structure of the present invention;

[0032] Figure 2 It is a schematic diagram of the top view of the structure of the present invention;

[0033] Figure 3 This is a schematic diagram of the structure of the welding operation chamber of the present invention in an open state;

[0034] Figure 4 This is a schematic diagram of the structure of the welding operation chamber in a closed state of the present invention;

[0035] Figure 5 It is a structural schematic diagram of the loading and unloading device of the present invention;

[0036] Figure 6 It is a schematic diagram of the structure of the combined state of the clamp and the workpiece adapter plate of the present invention;

[0037] Figure 7 It is a schematic diagram of the structure of the laser protection lens of the present invention;

[0038] Figure 8 The present invention Figure 3 A local enlarged structural diagram of region A;

[0039] Fig. 9 The present invention Figure 3 A schematic diagram of a local enlarged structure of region B;

[0040] Fig.10 The present invention Figure 5 Schematic diagram of the local enlarged structure of the C area.

[0041] Description of the accompanying drawings: 1. welding platform assembly; 2. loading and unloading device; 3. vacuum device; 3-1. welding operation chamber; 4. laser welding machine; 5. power slide; 6. tank cover assembly; 6-1. tank cover plate; 7. screw lifting slide; 8. limit slide; 9. support seat; 9-1. spring stopper; 9-1-1. through hole; 10. workpiece support seat; 10-1. collision block; 10-2. spring guide column; 11. positioning spring; 12. fixture; 13. workpiece adapter plate; 1 4. Tank assembly; 15. Limit block; 16. Sealing ring; 17. Vacuum pump; 18. Pneumatic high vacuum ball valve; 19. Power cross slide; 20. Laser protection lens mounting plate; 21. Laser protection lens; 21-1. Lens transmission part; 21-2. Lens mounting part; 21-3. Water cooling channel; 21-4. Mounting hole; 22. Organ cover; 23. Rotary clamping cylinder; 24. Cylinder mounting seat; 25. Photoelectric switch assembly; 26. Locking plate; 27. Locking bolt. DETAILED DESCRIPTION

[0042] The following is combined with Figures 1 to 10 This application is described in further detail.

[0043] The embodiment of the present application discloses a vacuum laser welding machine.

[0044] Reference Figures 1 to 10 A vacuum laser welding machine comprises a welding platform assembly 1, a workpiece loading and unloading and vacuum pumping mechanism and a laser welding mechanism. The workpiece loading and unloading and vacuum pumping mechanism comprises at least one loading and unloading device 2 for clamping the workpiece and at least one vacuum pumping device 3 for providing a vacuum environment for vacuum welding. The bottom of the loading and unloading device 2 is installed on the welding platform assembly 1. The loading and unloading device 2 is used to clamp and position the workpiece. The vacuum pumping device 3 is provided with an openable and closable welding working chamber 3-1. The top of the welding working chamber 3-1 is provided with a laser protection device for laser beam transmission. When the loading and unloading device 2 enters the welding working chamber 3-1 and reaches the workpiece welding position, the welding working chamber 3-1 is sealed, and the vacuum pumping device 3 vacuumizes the welding working chamber 3-1. The laser welding mechanism comprises at least one laser welding machine 4. The laser beam emitted by the laser head of the laser welding machine 4 penetrates the laser protection device on the top of the welding working chamber 3-1 to complete the laser welding of the workpiece under the vacuum environment.

[0045] By adopting the above technical solution, the workpiece is placed on the loading and unloading device 2 for clamping and positioning. The loading and unloading device 2 carries the workpiece into the welding working chamber 3-1 of the vacuum pumping device 3 to reach the workpiece welding position. The welding working chamber 3-1 is sealed, and the vacuum pumping device 3 vacuumizes the welding working chamber 3-1. The laser beam emitted by the laser head of the laser welding machine 4 penetrates the laser protection lens on the top of the welding working chamber 3-1 to complete the laser welding of the workpiece in a vacuum environment.

[0046] The workpiece loading and unloading and vacuuming mechanism includes a loading and unloading device 2 and a vacuuming device 3. The loading and unloading device 2 includes a power slide 5 and a workpiece clamping device. The track of the power slide 5 is fixedly installed on the upper surface of the welding platform assembly 1. The workpiece clamping device is installed on the slider of the power slide 5 and moves with the slider. The vacuuming device 3 is fixedly installed on the upper surface of the welding platform assembly 1. The vacuuming device 3 and the loading and unloading device 2 form a closed welding working chamber 3-1. When the loading and unloading device 2 transports the workpiece into the welding working chamber 3-1 and arrives at the welding station, it is fixed. The vacuuming device 3 pumps the welding working chamber 3-1 into a vacuum environment, and during the vacuuming process, the position of the workpiece on the loading and unloading device 2 remains fixed.

[0047] The workpiece is placed on the workpiece clamping device and clamped in position. The power slide 5 is started. The slider of the power slide 5 drives the workpiece clamping device and the workpiece to be transported to the vacuum pumping device 3. The vacuum pumping device 3 and the loading and unloading device 2 form a closed welding operation chamber 3-1. At this time, the workpiece arrives at the welding position, the position of the loading and unloading device 2 is fixed, and the vacuum pumping device 3 pumps the welding operation chamber 3-1 into a vacuum environment. During the vacuum pumping process, the position of the workpiece on the loading and unloading device 2 remains fixed.

[0048] The loading and unloading device 2 includes a tank cover assembly 6, a screw lifting slide 7, a limit slide 8, a support seat 9, a workpiece support seat 10, a positioning spring 11, a fixture 12 for clamping the workpiece and a workpiece adapter plate 13. The tank cover assembly 6 is provided with a tank cover plate 6-1, the bottom of the tank cover assembly 6 is mounted on the slider of the power slide 5, the track of the screw lifting slide 7 is fixedly mounted on the tank cover plate 6-1, and the upper surface of the support seat 9 is provided with at least one spring stopper 9-1, and the spring stopper 9-1 is provided with a through hole 9-1- 1, one side of the support seat 9 is installed on the slider of the screw lifting slide 7, and moves up and down with the slider, the track of the limit slide 8 is installed on the upper surface of the support seat 9, one side of the workpiece support seat 10 is provided with a collision block 10-1 for locating the horizontal position of the workpiece support seat 10, and the other side is provided with at least one spring guide column 10-2 for maintaining the horizontal position of the workpiece support seat 10, the bottom of the workpiece support seat 10 is installed on the slider of the limit slide 8, the spring guide column 10-2 is covered with a positioning spring 11, and passes through the spring The through hole 9-1-1 on the stopper 9-1 moves horizontally under the guidance of the through hole 9-1-1. The bottom of the fixture 12 is installed on the upper surface of the workpiece support seat 10 and moves with the workpiece support seat 10. The workpiece adapter plate 13 is used to position and clamp the workpiece to be welded. The workpiece adapter plate 13 is detachably installed on the positioning element of the fixture 12. The vacuum device 3 includes a tank assembly 14, a limit block 15, a sealing ring 16, a vacuum pump 17 and a pneumatic high vacuum ball valve 18. One side of the tank assembly 14 is provided with There is an open end face for matching the tank cover plate 6-1, and a groove for assembling a sealing ring is provided on the open end face. At least one lens mounting port and a vacuum port for assembling a laser protection lens are provided on the tank assembly 14. The limit block 15 is adjustably mounted on the inner wall of the tank assembly 14 and faces the open end face. The sealing ring 16 is mounted in the groove on the open end face of one side of the tank assembly 14. The vacuum pump 17 is sealed and connected to the vacuum port of the tank assembly 14 through a pipeline and a pneumatic high vacuum ball valve 18.

[0049] The workpiece adapter plate 13 is provided with a profiling portion for matching the workpiece to be welded, and the workpiece adapter plate 13 can be flexibly replaced according to different workpieces. The workpiece to be welded is placed on the profiling portion of the workpiece adapter plate 13, and the workpiece and the profiling portion fit tightly to ensure that the clamping is more reliable. The clamp 12 is started, and the clamping portion of the clamp 12 is started to clamp the workpiece on the workpiece adapter plate 13 to complete the clamping of the workpiece. The screw lifting slide 7 can be hand-cranked or electric screw. The screw lifting slide 7 is started, and the slider drives the support seat 9 and the workpiece clamped thereon to move up and down and adjust to the process setting position and then stop. The screw lifting slide 7 has a self-locking function, and the position of the support seat 9 is fixed;

[0050] The power slide 5 is started, and the slider of the power slide 5 drives the loading and unloading device 2 and the workpiece to move toward the vacuum device 3. When the tank cover plate 6-1 contacts the sealing ring 16 installed on the open end surface of the tank body assembly 14, the tank cover plate 6-1 and the inside of the tank body assembly 14 form a welding operation chamber 3-1 isolated from the outside world. At this time, the collision block 10-1 on one side of the workpiece support seat 10 abuts against the limit block 15 in the tank body assembly 14 to ensure that the relative distance between the workpiece and the tank body assembly 14 is fixed. At the same time, the spring guide column 10-2 on the other side of the workpiece support seat 10 is inserted into the through hole 9-1-1 of the spring stopper 9-1 and compresses the spring 11. The vacuum pump 17 is started and the operator The pneumatic high vacuum ball valve 18 is opened, and the vacuum pump 17 evacuates the welding operation chamber 3-1. Due to the effect of atmospheric pressure, the tank cover plate 6-1 is pressed against the open end face of the tank assembly 14. In order to ensure the sealing, the sealing ring 16 adopts a flexible sealing ring. At this time, the sealing ring 16 is compressed. Since the collision block 10-1 and the limit block 15 are in hard contact, when the sealing ring 16 is deformed, the other side of the workpiece support seat 10 will further compress the spring 11. The deformation of the spring 11 compensates for the deformation of the sealing ring 16. During the entire vacuuming process of the packaging, the position of the workpiece support seat 10 located on the support seat 9 remains fixed, thereby ensuring that the position of the workpiece clamped on the fixture 12 remains unchanged.

[0051] When the collision block 10 - 1 on the workpiece support seat 10 is in hard contact with the limiting block 15 , the side surface of the tank cover plate 6 - 1 contacts the sealing surface of the sealing ring 16 , and the positioning spring 11 is in a compressed state.

[0052] It is ensured that the deformation of the spring 11 can compensate for the deformation of the sealing ring 16 during vacuuming, thereby ensuring that the tank cover plate 6-1 is pressed tightly against the open end surface of one side of the tank body assembly 14 during vacuuming.

[0053] The laser welding mechanism includes at least one set of laser welding devices and laser protection devices. The laser welding device includes a power cross slide 19 and a laser welding machine 4. The track of the power cross slide 19 is fixedly installed on the welding platform assembly 1 through a frame and is located on one side of the workpiece loading and unloading and vacuuming mechanism. The base of the laser welding machine 4 is installed on the slider of the power cross slide 19. The laser protection device includes a laser protection lens mounting plate 20, a laser protection lens 21 and an accordion cover 22. The laser protection lens mounting plate 20 is provided with a lens mounting position. The laser protection lens mounting plate 20 is fixedly installed at the lens mounting port on the tank assembly 14. The laser protection lens 21 is fixedly installed at the lens mounting position of the laser protection lens mounting plate 20. One end of the accordion cover 22 is connected to the lens mounting port of the tank assembly 14, and the other end is connected to the laser head housing of the laser welding machine 4. Preferably, the laser welding device and the laser protection device are two sets, and the two sets of laser welding devices and laser protection devices are respectively arranged on the top and one side of the welding operation chamber 3-1.

[0054] The powered cross slide 19 is started, and the slider drives the laser welding machine 4 installed thereon to complete the lateral and longitudinal movement and position adjustment, so that the laser head of the laser welding machine 4 is aligned with the laser protection lens 21. After the laser protection lens mounting plate 20 and the laser protection lens 21 are installed, the welding operation chamber 3-1 is sealed. The laser protection lens 21 ensures that during the welding process, the laser emitted by the laser head of the laser welding machine 4 can be projected into the welding operation chamber 3-1 to weld the workpiece.

[0055] At least one water inlet and a water outlet are provided on the side of the laser protection lens 21, and a lens transmission part 21-1 for laser focusing transmission, a lens mounting part 21-2 for installation, and a water cooling channel 21-3 for cooling the lens transmission part 21-1 are provided inside. The lens transmission part 21-1 and the lens mounting part 21-2 are combined into the laser protection lens 21, and the lens transmission part 21-1 is located on one side of the center of the laser protection lens 21, and a group of mounting holes 21-4 are respectively provided on the outer side of the lens mounting part 21-2 and on one side surrounding the lens transmission part 21-1, and the two ends of the water cooling channel 21-3 are respectively connected to the water inlet and the water outlet.

[0056] During the vacuum laser welding process, the water cooling channel 21-3 of the laser protection lens 21 is connected to the external water cooling circulation device through the water inlet and the water outlet, so as to cool and dissipate the heat of the lens transmission part 21-1 of the laser protection lens 21, thereby greatly increasing the service life of the laser protection lens 21; and the lens transmission part 21-1 is an eccentric structure relative to the lens mounting part 21-2 of the laser protection lens 21. When different workpieces need to be welded, the entire laser protection lens 21 is flipped 180 degrees and installed to meet the welding process requirements of different workpieces.

[0057] The workpiece loading and unloading and vacuum pumping mechanism also has at least one set of tank cover clamping assembly, which includes a rotary clamping cylinder 23 and a cylinder mounting seat 24. The cylinder mounting seat 24 is fixedly mounted on the top of the tank cover plate 6-1, and the cylinder body of the rotary clamping cylinder 23 is mounted on the cylinder mounting seat 24. When the tank cover plate 6-1 and the tank body assembly 14 are closed, the rotary pressing grip of the rotary clamping cylinder 23 presses the tank cover plate 6-1 and the tank body assembly 14.

[0058] When the tank cover plate 6-1 is pressed against the sealing ring 16 at the side open end face of the tank body assembly 14, the rotary pressing cylinder 23 is started, and the rotary pressing head of the rotary pressing cylinder 23 rotates downward 90°, and then the piston rod is retracted. The rotary pressing head presses the side open end face of the tank body assembly 14 and the tank cover plate 6-1, and then the vacuum pump 17 is turned on to draw a vacuum. Such an arrangement can greatly shorten the vacuum drawing time of the vacuum pump 17, reduce energy consumption, and improve efficiency.

[0059] The workpiece loading and unloading and vacuuming mechanism also has a can cover detection device, which is composed of at least two sets of photoelectric switch components 25. The photoelectric switch component 25 is adjustably mounted on the welding platform component 1 through a mounting plate and is located on one side of the loading and unloading device 2 for detecting the position of the can cover plate 6-1.

[0060] When the photoelectric switch assembly 25 passes toward the detection tank cover plate 6 - 1 , the detection tank cover plate 6 - 1 blocks the photoelectric switch assembly 25 , thereby detecting the position of the tank cover plate 6 - 1 .

[0061] The screw lifting slide 7 of the workpiece clamping device is a screw lifting slide with a self-locking mechanism.

[0062] The screw lifting slide 7 is provided with a self-locking mechanism. When the screw of the screw lifting slide 7 stops rotating, the position of the slide block is automatically locked due to the self-locking mechanism, thereby ensuring that the position of the support seat 9 mounted thereon is fixed.

[0063] The workpiece clamping device also has a workpiece position locking assembly, which includes at least one locking plate 26 and a locking bolt 27. The locking plate 26 is provided with at least one row of locking holes for matching and inserting the locking bolts 27. The locking plate 26 is fixedly mounted on the tank cover plate 6-1 and is located on one side of the track of the screw lifting slide 7. When the workpiece arrives at the set welding station, the locking bolt 27 is inserted into the locking hole of the locking plate 26 to complete the mechanical positioning and locking of the workpiece clamping device.

[0064] When the screw of the screw lifting slide 7 stops rotating and the workpiece reaches the set welding position height, the locking bolt 27 is inserted into the locking hole of the locking plate 26 to complete the mechanical positioning and locking of the workpiece clamping device, thereby adding a mechanical locking to the self-locking mechanism of the screw lifting slide 7 to ensure that the position of the workpiece remains unchanged during the welding process, thereby ensuring that the entire welding is completed with high quality.

[0065] The implementation principle of a vacuum laser welding machine in the embodiment of the present application is:

[0066] When a person or a robot places the workpiece on the workpiece adapter plate 13, the fixture 12 starts to drive the chuck to clamp the workpiece, and then manually adjusts the special screw to lock the workpiece, and then manually adjusts the support seat 9 through the screw lifting slide 7 to make the workpiece reach the specified height position, and inserts the locking bolt 27 into the locking hole of the locking plate 26 to complete the mechanical positioning and locking of the workpiece clamping device.

[0067] The power slide 5 is started. The power of the power slide 5 can be an oil cylinder, an air cylinder or a reduction motor. The slider of the power slide 5 drives the loading and unloading device 2 and the workpiece to move toward the open end face of the tank assembly 14 of the vacuum device 3. When the tank cover plate 6-1 contacts the sealing ring 16 installed on the open end face of one side of the tank assembly 14, the tank cover plate 6-1 and the inside of the tank assembly 14 form a welding operation chamber 3-1 isolated from the outside world. At this time, the collision block 10-1 on one side of the workpiece support seat 10 abuts against the limit block 15 in the tank assembly 14 to ensure that the relative distance between the workpiece and the tank assembly 14 is fixed. At the same time, the spring guide column 10-2 on the other side of the workpiece support seat 10 is inserted into the through hole 9-1-1 of the spring stop block 9-1 and compresses the spring 11.

[0068] When the tank cover plate 6-1 is pressed against the sealing ring 16 at the side open end face of the tank body assembly 14, the rotary pressing cylinder 23 is started, and the rotary pressing head of the rotary pressing cylinder 23 rotates downward 90°, and then the piston rod is retracted. The rotary pressing head presses the side open end face of the tank body assembly 14 and the tank cover plate 6-1, and then the vacuum pump 17 is turned on to draw a vacuum. Such an arrangement can greatly shorten the vacuum drawing time of the vacuum pump 17, reduce energy consumption, and improve efficiency.

[0069] The vacuum pump 17 is started, and the pneumatic high vacuum ball valve 18 is operated to open. The vacuum pump 17 evacuates the welding operation chamber 3-1. Due to the effect of atmospheric pressure, the tank cover plate 6-1 is pressed against the open end face of the tank assembly 14. In order to ensure the sealing, the sealing ring 16 adopts a flexible sealing ring. At this time, the sealing ring 16 is compressed. Since the collision block 10-1 and the limit block 15 are in hard contact, when the sealing ring 16 is deformed, the other side of the workpiece support seat 10 will further compress the spring 11. The deformation of the spring 11 compensates for the deformation of the sealing ring 16. During the entire vacuuming process of the packaging, the position of the workpiece support seat 10 located on the support seat 9 remains fixed, thereby ensuring that the position of the workpiece clamped on the fixture 12 remains unchanged.

[0070] Two sets of laser welding devices and corresponding laser protection devices can be set up. The two sets of laser welding devices are used to weld the top surface and side surfaces of the workpiece in the welding operation chamber 3-1. The adjustment of the workstation and the welding operation principles are the same.

[0071] When the vacuum degree in the welding operation chamber 3-1 reaches the set process value, the powered cross slide 19 is started, and the slide drives the laser welding machine 4 installed thereon to complete the lateral and longitudinal movement and position adjustment. At the same time, the laser head of the laser welding machine 4 can be rotated and swung left and right at a certain angle under the drive of the servo motor on the laser welding machine 4 to adapt to workpieces of different sizes and weld widths. After the adjustment is completed, the laser head of the laser welding machine 4 is aligned with the laser protection lens 21. After the laser protection lens mounting plate 20 and the laser protection lens 21 are installed, the welding operation chamber 3-1 is sealed. The laser protection lens 21 ensures that during the welding process, the laser emitted by the laser head of the laser welding machine 4 can be projected into the welding operation chamber 3-1 to weld the workpiece.

[0072] When the welding process time is over, the pneumatic high vacuum ball valve 18 automatically opens to replenish air into the welding operation chamber 3-1. When the air pressure in the welding operation chamber 3-1 is balanced with the outside, the rotary pressing cylinder 23 is started again to reset, the power slide 5 is started, the tank cover 6-1 is separated from the tank assembly 14, and when the photoelectric switch assembly 25 detects that the tank cover 6-1 is reset, the clamp 12 is released to take out the workpiece. When the workpieces are of the same type, only manual or robot loading and unloading is required to automatically complete the top and side welding of the workpiece. The position of the workpiece and the laser head will only be adjusted when the type is changed.

[0073] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A vacuum laser welding machine, characterized in that: The invention comprises a welding platform assembly (1), a workpiece loading and unloading and vacuum pumping mechanism, and a workpiece loading and unloading laser welding mechanism. The workpiece loading and unloading and vacuum pumping mechanism comprises at least one loading and unloading device (2) for clamping the workpiece and at least one vacuum pumping device (3) for providing a vacuum environment for vacuum welding. The bottom of the loading and unloading device (2) is mounted on the welding platform assembly (1). The loading and unloading device (2) is used to clamp and position the workpiece. The vacuum pumping device (3) is provided with an openable and closable welding operation cavity (3-1). The top of the welding operation cavity (3-1) is provided with a laser protection device for laser beam transmission. When the loading and unloading device (2) enters the welding operation cavity (3-1) and reaches the workpiece welding position, the welding operation cavity (3-1) is sealed, and the vacuum pumping device (3) vacuumizes the welding operation cavity (3-1). The laser welding mechanism comprises at least one laser welding machine (4). The laser beam emitted by the laser head of the laser welding machine (4) penetrates the laser protection device on the top of the welding operation cavity (3-1) to complete the laser welding of the workpiece under the vacuum environment. The workpiece loading and unloading and vacuuming mechanism comprises a loading and unloading device (2) and a vacuuming device (3), wherein the loading and unloading device (2) comprises a power slide (5) and a workpiece clamping device, wherein the track of the power slide (5) is fixedly mounted on the upper surface of the welding platform assembly (1), the workpiece clamping device is mounted on the slider of the power slide (5) and moves with the slider, the vacuuming device (3) is fixedly mounted on the upper surface of the welding platform assembly (1), the vacuuming device (3) and the loading and unloading device (2) form a closed welding operation chamber (3-1), when the loading and unloading device (2) transports the workpiece into the welding operation chamber (3-1) and fixes it at the welding station, the vacuuming device (3) draws the welding operation chamber (3-1) into a vacuum environment, and during the vacuuming process, the position of the workpiece on the loading and unloading device (2) remains fixed; The loading and unloading device (2) comprises a tank cover assembly (6), a screw rod lifting slide (7), a limit slide (8), a support seat (9), a workpiece support seat (10), a positioning spring (11), a fixture (12) for clamping the workpiece, and a workpiece adapter plate (13); the tank cover assembly (6) is provided with a tank cover plate (6-1); the bottom of the tank cover assembly (6) is mounted on a slider of a power slide (5); the track of the screw rod lifting slide (7) is fixedly mounted on the tank cover plate (6-1); the upper surface of the support seat (9) is provided with at least one spring stopper (9-1); the spring stopper (9-1) is provided with a spring stopper (9-2); the spring stopper (9-2) is provided with a spring stopper (9-3) and a spring stopper (9-4) is provided on the upper surface of the support seat (9); the spring stopper (9-1) is provided with a spring stopper (9-5) and a spring stopper (9-6) is provided on the upper surface of the support seat (9); the spring stopper (9-1) is provided with a spring stopper (9-6) and a spring stopper (9-5) is provided on the upper surface of the support seat (9); the spring stopper (9-1) is provided with a spring stopper (9-5) and a spring stopper (9-6 ... 1) is provided with a through hole (9-1-1), one side of the support seat (9) is installed on the slider of the screw lifting slide (7) and moves up and down with the slider, the track of the limit slide (8) is installed on the upper surface of the support seat (9), one side of the workpiece support seat (10) is provided with a collision block (10-1) for locating the horizontal position of the workpiece support seat (10), and the other side is provided with at least one spring guide column (10-2) for maintaining the horizontal position of the workpiece support seat (10), the bottom of the workpiece support seat (10) is installed on the slider of the limit slide (8), and the spring guide column (10-2) is sleeved with a positioning spring (10-1) 1), and passes through the through hole (9-1-1) on the spring stopper (9-1), and moves horizontally under the guidance of the through hole (9-1-1), the bottom of the clamp (12) is installed on the upper surface of the workpiece support seat (10), and moves with the workpiece support seat (10), the workpiece adapter plate (13) is used to position and clamp the workpiece to be welded, and the workpiece adapter plate (13) is detachably installed on the positioning element of the clamp (12), the vacuum device (3) includes a tank assembly (14), a limit block (15), a sealing ring (16), a vacuum pump (17) and a pneumatic high vacuum ball valve (18), the tank An open end surface for matching the tank cover plate (6-1) is provided on one side of the assembly (14), and a groove for assembling a sealing ring is provided on the open end surface. At least one lens installation port for assembling a laser protection lens and a vacuum port are provided on the tank assembly (14). The limit block (15) is adjustably mounted on the inner wall of the tank assembly (14) and faces the open end surface. The sealing ring (16) is mounted on the groove on the open end surface of one side of the tank assembly (14). The vacuum pump (17) is sealed and connected to the vacuum port of the tank assembly (14) through a pipeline and a pneumatic high vacuum ball valve (18). The laser welding mechanism comprises at least one set of laser welding devices and a laser protection device, wherein the laser welding device comprises a power cross slide (19) and a laser welding machine (4), wherein the track of the power cross slide (19) is fixedly mounted on the welding platform assembly (1) through a frame and is located on one side of a workpiece loading and unloading and vacuum pumping mechanism, wherein the base of the laser welding machine (4) is mounted on a slider of the power cross slide (19), wherein the laser protection device comprises a laser protection lens mounting plate (20), a laser protection lens (21) and an accordion cover (22), wherein the laser protection lens mounting plate ( 20) is provided with a lens mounting position, the laser protection lens mounting plate (20) is fixedly mounted at the lens mounting port on the tank assembly (14), the laser protection lens (21) is fixedly mounted at the lens mounting position of the laser protection lens mounting plate (20), one end of the accordion cover (22) is connected to the lens mounting port of the tank assembly (14), and the other end is connected to the laser head housing of the laser welding machine (4); the laser welding device and the laser protection device are two sets, and the two sets of laser welding devices and laser protection devices are respectively arranged on the top and one side of the welding operation chamber (3-1).

2. A vacuum laser welding machine according to claim 1, characterized in that: When the collision block (10-1) on the workpiece support seat (10) is in hard contact with the limit block (15), the side surface of the tank cover plate (6-1) contacts the sealing surface of the sealing ring (16), and the positioning spring (11) is in a compressed state.

3. A vacuum laser welding machine according to claim 1, characterized in that: The laser protection lens (21) is provided with at least one water inlet and a water outlet on its side, and is provided with a lens transmission part (21-1) for laser focusing transmission, a lens mounting part (21-2) for mounting, and a water cooling channel (21-3) for cooling the lens transmission part (21-1) inside; the lens transmission part (21-1) and the lens mounting part (21-2) are combined to form the laser protection lens (21), and the lens transmission part (21-1) is located on one side of the center of the laser protection lens (21); a group of mounting holes (21-4) are respectively provided on the outer side of the lens mounting part (21-2) and on one side surrounding the lens transmission part (21-1); and both ends of the water cooling channel (21-3) are respectively connected to the water inlet and the water outlet.

4. A vacuum laser welding machine according to claim 1, characterized in that: The workpiece loading and unloading and vacuum pumping mechanism also has at least one set of tank cover pressing components, the tank cover pressing components comprising a rotary pressing cylinder (23) and a cylinder mounting seat (24), the cylinder mounting seat (24) being fixedly mounted on the top of the tank cover plate (6-1), the cylinder body of the rotary pressing cylinder (23) being mounted on the cylinder mounting seat (24), and when the tank cover plate (6-1) and the tank body assembly (14) are closed, the rotary pressing grip of the rotary pressing cylinder (23) presses the tank cover plate (6-1) and the tank body assembly (14) together.

5. The vacuum laser welding machine according to claim 1, characterized in that: The workpiece loading and unloading and vacuum pumping mechanism also has a can cover detection device, which is composed of at least two sets of photoelectric switch components (25). The photoelectric switch components (25) are adjustably mounted on the welding platform component (1) through a mounting plate and are located on one side of the loading and unloading device (2) for detecting the position of the can cover plate (6-1).

6. A vacuum laser welding machine according to claim 1, characterized in that: The screw lifting slide (7) of the workpiece clamping device is a screw lifting slide with a self-locking mechanism.

7. The vacuum laser welding machine according to claim 1, characterized in that: The workpiece clamping device also has a workpiece position locking assembly, which includes at least one locking plate (26) and a locking bolt (27). The locking plate (26) is provided with at least one row of locking holes for matching and inserting the locking bolts (27). The locking plate (26) is fixedly mounted on the tank cover plate (6-1) and is located on one side of the track of the screw lifting slide (7). When the workpiece reaches a set welding station height, the locking bolt (27) is inserted into the locking hole of the locking plate (26) to complete the mechanical positioning and locking of the workpiece clamping device.

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