A workpiece loading and unloading and vacuum pumping mechanism for vacuum laser welding machine

Abstract

A workpiece loading and unloading and vacuum pumping mechanism for a vacuum laser welding machine relates to the field of mechanical manufacturing and processing technology, including a loading and unloading device and a vacuum pumping device, wherein the loading and unloading device includes a power slide, a vacuum tank assembly and a workpiece clamping device, wherein the track of the power slide is fixedly mounted on the upper surface of the welding platform of the vacuum laser welding machine, wherein the vacuum tank assembly includes a tank cover assembly, a sealing ring and a tank body assembly, wherein the tank cover assembly is mounted on the slider of the power slide and moves with the slider, wherein the tank body assembly is mounted on the upper surface of the welding platform of the vacuum laser welding machine. The present invention can provide mechanized loading, welding station positioning and a stable and reliable vacuum welding environment for vacuum welding of larger mechanical parts, has a compact structure, low manufacturing cost, continuity, high speed, low equipment loss, strong versatility, and stable and reliable operation.

Description

Technical Field

[0001] The present application relates to the technical field of mechanical manufacturing and processing, and in particular to a workpiece loading and unloading and vacuum pumping mechanism for 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. In order to realize batch welding of mechanical workpieces, vacuum laser welding requires mechanized loading and unloading, and the ability to provide a stable vacuum environment for the workpieces to be welded. Existing vacuum laser welding equipment at home and abroad simply places the workpiece in a box, then closes the box and evacuates it, which makes it difficult to achieve batch vacuum welding. In addition, the price is high, and its application range is limited, which does not meet the process requirements of vacuum welding processing.

[0003] The above-mentioned related prior arts have the following defects: the loading and unloading and vacuum pumping devices of the existing vacuum welding equipment are small in size, suitable for a single workpiece, and difficult to position the workpiece, which affects the subsequent welding quality and cannot meet the process requirements. Summary of the invention

[0004] In order to improve the problems in the prior art that the loading and unloading and vacuuming devices of the existing vacuum welding equipment are small in size, suitable for a single workpiece, and difficult to position, which affects the subsequent welding quality and cannot meet the process requirements, the present application provides a workpiece loading and unloading and vacuuming mechanism for a vacuum laser welding machine. The following technical solutions are adopted:

[0005] A workpiece loading and unloading and vacuum pumping mechanism for a vacuum laser welding machine comprises a loading and unloading device and a vacuum pumping device, wherein the loading and unloading device comprises a power slide, a vacuum tank assembly and a workpiece clamping device, wherein the track of the power slide is fixedly mounted on the upper surface of the welding platform of the vacuum laser welding machine, wherein the vacuum tank assembly comprises a tank cover assembly, a sealing ring and a tank body assembly, wherein the tank cover assembly is mounted on a slider of the power slide and moves with the slider, wherein the tank body assembly is mounted on the upper surface of the welding platform of the vacuum laser welding machine, wherein one side of the tank body assembly is open and an open end face is provided on the open side, wherein the tank body assembly is provided with a sealing ring and a tank body assembly. The open end face is provided with a sealing groove, and the top and side of the tank body assembly are provided with at least one laser protection lens for laser transmission of the laser welding machine. The sealing ring is assembled at the sealing groove, and the workpiece clamping device is installed on the tank cover assembly. When the tank cover assembly follows the slider of the power slide table and moves toward the tank body assembly to be close to the sealing ring, the tank cover assembly and the tank body assembly form a welding working cavity, and the workpiece clamped on the workpiece clamping device is located in the welding working cavity. The vacuum pumping device is used to vacuum the welding working cavity, and when the vacuum pumping device is vacuumed, the position of the workpiece clamped on the workpiece clamping device remains unchanged.

[0006] By adopting the above technical scheme, the workpiece is placed on the workpiece clamping device for clamping and positioning, the power slide is started, and the slider of the power slide drives the tank cover assembly and the workpiece clamped on the workpiece clamping device, and transports them through the open end surface to the tank body assembly. The tank cover assembly and the tank body assembly 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 vacuuming process, the position of the loading and unloading device and the clamped workpiece remains fixed. The setting of the laser protection lens facilitates the laser transmission of the laser welding machine.

[0007] Optionally, the workpiece clamping device includes 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 track of the screw lifting slide is fixedly mounted 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 through hole on the spring stopper, and moves horizontally under the guidance of the through hole, the bottom of the fixture 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 is detachably mounted on the positioning element of the fixture.

[0008] 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;

[0009] The power slide starts, and the slider of the power slide drives the tank cover assembly and the workpiece clamped on the workpiece clamping device, and transports them through the open end surface to the tank body assembly. When the tank cover plate contacts the sealing ring assembled on the open end surface 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 stop block to compress the spring.

[0010] Optionally, the vacuum tank assembly also has a limit block, which is detachably mounted on the inner wall of the tank body assembly, facing the opening. When the tank cover assembly follows the slider of the power slide and moves toward the tank body assembly until it is close to the sealing ring, the tank cover assembly and the tank body assembly form a welding operation cavity. At this time, the collision block on the workpiece support seat is in hard contact with the limit block, and the positioning spring is in a compressed state.

[0011] By adopting the above technical solution, the collision block on one side of the workpiece support seat abuts against the limit block in the tank assembly to ensure that the relative distance between the workpiece and the tank 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 stop block, and the spring is compressed, and the positioning spring is in a compressed state.

[0012] Optionally, the vacuum pumping device includes a pipeline, a vacuum pump and a pneumatic high vacuum ball valve, a vacuum hole is provided on the tank assembly, and the vacuum pump is connected to the vacuum hole through the pneumatic high vacuum ball valve and the pipeline.

[0013] By adopting the above technical solution, the vacuum pump is started, the pneumatic high vacuum ball valve is operated to open, and the vacuum pump evacuates the welding operation chamber. Due to the effect of atmospheric pressure, the tank cover plate 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.

[0014] 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.

[0015] 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.

[0016] Optionally, the loading and unloading device also has at least one set of tank cover clamping assembly, and 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, and when the tank cover plate and the tank body assembly are closed, the rotary pressing grip of the rotary clamping cylinder presses the tank cover plate and the tank body assembly.

[0017] 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.

[0018] Optionally, the loading and unloading device also has a tank cover detection device, which is composed of at least two groups of photoelectric switch components. The photoelectric switch components are adjustably mounted on the welding platform 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.

[0019] By adopting the above technical solution, when the photoelectric switch assembly passes toward the detection tank cover, the detection tank cover blocks the photoelectric switch assembly, thereby detecting the position of the tank cover

[0020] Optionally, the screw lifting slide of the workpiece clamping device is a screw lifting slide with a self-locking mechanism.

[0021] 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.

[0022] 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 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.

[0023] 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.

[0024] 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.

[0025] 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.

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

[0027] 1. The present invention can provide a workpiece loading and unloading and vacuum pumping mechanism for a vacuum laser welding machine, which can provide mechanized loading, welding station positioning and a stable and reliable vacuum welding environment for vacuum welding of larger mechanical parts. It 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 This is a schematic diagram of the structure of the welding operation chamber of the present invention in an open state;

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

[0034] Figure 4 It is a structural schematic diagram of the loading and unloading device of the present invention;

[0035] Figure 5 It is a schematic diagram of the structure of the combined state of the clamp and the workpiece adapter plate of the present invention;

[0036] Figure 6 It is a schematic diagram of the structure of the laser protection lens of the present invention;

[0037] Figure 7 The present invention Figure 2 A local enlarged structural diagram of region A;

[0038] Figure 8 The present invention Figure 4 Schematic diagram of the local enlarged structure of area B.

[0039] Explanation of the accompanying drawings: 1. welding platform; 3-1. welding operation chamber; 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. impact block; 10-2. spring guide column; 11. positioning spring; 12. fixture; 13. workpiece adapter plate; 14. tank assembly; 15. limit block; 16. sealing ring; 17. vacuum pump; 18. pneumatic high vacuum ball valve; 21. laser protection lens; 23. rotary clamping cylinder; 24. cylinder mounting seat; 25. photoelectric switch assembly; 26. locking plate; 27. locking bolt. DETAILED DESCRIPTION

[0040] The following is combined with Figures 1 to 8 This application is described in further detail.

[0041] The embodiment of the present application discloses a workpiece loading and unloading and vacuum pumping mechanism for a vacuum laser welding machine.

[0042] Reference Figures 1 to 8 A workpiece loading and unloading and vacuum pumping mechanism for a vacuum laser welding machine includes a loading and unloading device and a vacuum pumping device. The loading and unloading device includes a power slide 5, a vacuum tank assembly and a workpiece clamping device. The track of the power slide 5 is fixedly installed on the upper surface of the welding platform 1 of the vacuum laser welding machine. The vacuum tank assembly includes a tank cover assembly 6, a sealing ring 16 and a tank body assembly 14. The tank cover assembly 6 is installed on the slider of the power slide 5 and moves with the slider. The tank body assembly 14 is installed on the upper surface of the welding platform of the vacuum laser welding machine. One side of the tank body assembly 14 is open, and an open end surface is provided at the open side. The open end surface is provided with a The sealing groove and the top and side of the tank body assembly 14 are provided with at least one laser protection lens 21 for laser transmission of the laser welding machine. The sealing ring 16 is assembled at the sealing groove. The workpiece clamping device is installed on the tank cover assembly 6. When the tank cover assembly 6 follows the slider of the power slide 5 and moves toward the tank body assembly 14 to be close to the sealing ring 16, the tank cover assembly 6 and the tank body assembly 14 form a welding working chamber 3-1, and the workpiece clamped on the workpiece clamping device is located in the welding working chamber 3-1. The vacuum pumping device is used to vacuum the welding working chamber 3-1, and when the vacuum pumping device is vacuumed, the position of the workpiece clamped on the workpiece clamping device remains unchanged.

[0043] The workpiece is placed on the workpiece clamping device for clamping and positioning, the power slide 5 is started, and the slider of the power slide 5 drives the tank cover assembly 6 and the workpiece clamped on the workpiece clamping device to pass through the open end surface and be transported to the tank body assembly 14. The tank cover assembly 6 and the tank body assembly 14 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 is fixed, and the vacuum device pumps the welding operation chamber 3-1 into a vacuum environment. During the vacuum pumping process, the position of the loading and unloading device and the clamped workpiece remains fixed. The setting of the laser protection lens 21 facilitates the laser transmission of the laser welding machine.

[0044] The workpiece clamping device includes 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, and the track of the screw lifting slide 7 is fixedly installed 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, 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 spring stopper for positioning the workpiece support. The support seat 10 has a collision block 10-1 in the horizontal position, 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 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 mounted on the positioning element of the clamp 12.

[0045] 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;

[0046] The power slide 5 is started, and the slider of the power slide 5 drives the tank cover assembly 6 and the workpiece clamped on the workpiece clamping device to pass through the open end surface and be transported into the tank body assembly 14. When the tank cover plate 6-1 contacts the sealing ring 16 installed on the open end surface of one side 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 stop block 9-1 and compresses the spring 11.

[0047] The vacuum tank assembly also has a limit block 15, which is detachably mounted on the inner wall of the tank body assembly 14, facing the opening. When the tank cover assembly 6 follows the slider of the power slide 5 and moves toward the tank body assembly 14 to be close to the sealing ring 16, the tank cover assembly 6 and the tank body assembly 14 form a welding operation cavity 3-1. At this time, the collision block 10-1 on the workpiece support seat 10 is in hard contact with the limit block 15, and the positioning spring 11 is in a compressed state.

[0048] 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, while positioning the spring 11 in a compressed state.

[0049] The vacuum pumping device includes a pipeline 28 , a vacuum pump 17 and a pneumatic high vacuum ball valve 18 . A vacuum hole is provided on the tank assembly 14 , and the vacuum pump 17 is connected to the vacuum hole through the pneumatic high vacuum ball valve 18 and the pipeline 28 .

[0050] 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.

[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 loading and unloading device 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 clamping grip of the rotary clamping cylinder 23 presses the tank cover plate 6-1 and the tank body assembly 14.

[0054] 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.

[0055] The loading and unloading device also has a tank cover detection device, which is composed of at least two groups of photoelectric switch components 25. The photoelectric switch components 25 are adjustably mounted on the welding platform 1 through a mounting plate and are located on one side of the loading and unloading device 2 for detecting the position of the tank cover plate 6-1.

[0056] 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.

[0057] The screw lifting slide 7 of the workpiece clamping device is a screw lifting slide with a self-locking mechanism.

[0058] 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.

[0059] 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 the 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] The implementation principle of a workpiece loading and unloading and vacuum pumping mechanism for a vacuum laser welding machine in the present application embodiment is as follows:

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] After the laser protection lens mounting plate 20 is installed, the welding operation chamber 3-1 is sealed, and 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.

[0069] 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 external air pressure, the rotary pressing cylinder 23 is started and reset again, the power slide 5 is started, and the tank cover plate 6-1 is separated from the tank body assembly 14. When the photoelectric switch component 25 detects that the tank cover plate 6-1 is reset, the clamp 12 is released to take out the workpiece.

[0070] 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 workpiece loading and unloading and vacuum pumping mechanism for a vacuum laser welding machine, characterized in that: The invention comprises a loading and unloading device and a vacuum pumping device, wherein the loading and unloading device comprises a power slide (5), a vacuum tank assembly and a workpiece clamping device, wherein the track of the power slide (5) is fixedly mounted on the upper surface of a welding platform (1) of a vacuum laser welding machine, wherein the vacuum tank assembly comprises a tank cover assembly (6), a sealing ring (16) and a tank body assembly (14), wherein the tank cover assembly (6) is mounted on a slider of the power slide (5) and moves with the slider, wherein the tank body assembly (14) is mounted on the upper surface of the welding platform of the vacuum laser welding machine, wherein one side of the tank body assembly (14) is open and an open end face is provided on the open side, wherein the open end face is provided with a sealing groove, wherein the tank body assembly (14) is provided with a sealing groove. 4) is provided with at least one laser protection lens (21) for transmitting laser light from a laser welding machine on its top and side, the sealing ring (16) is mounted at the sealing groove, the workpiece clamping device is mounted on the tank cover assembly (6), when the tank cover assembly (6) follows the slider of the power slide table (5) and moves toward the tank body assembly (14) to be close to the sealing ring (16), the tank cover assembly (6) and the tank body assembly (14) form a welding operation cavity (3-1), and the workpiece clamped on the workpiece clamping device is located in the welding operation cavity (3-1), the vacuum pumping device is used to vacuumize the welding operation cavity (3-1), and when the vacuum pumping device is vacuumized, the position of the workpiece clamped on the workpiece clamping device remains unchanged; The workpiece clamping device comprises 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 track of the screw 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 through hole (9-1-1); one side of the support seat (9) is mounted 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 mounted 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) is used to locate the horizontal position of the workpiece support seat (10), and at least one spring guide column (10-2) is provided on the other side 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 sleeved with a positioning spring (11) and passes through a 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 locate 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 pumping device comprises a pipeline (28), a vacuum pump (17) and a pneumatic high vacuum ball valve (18); a vacuum pumping hole is provided on the tank assembly (14); and the vacuum pump (17) is connected to the vacuum pumping hole through the pneumatic high vacuum ball valve (18) and the pipeline (28).

2. The workpiece loading and unloading and vacuum pumping mechanism for a vacuum laser welding machine according to claim 1, characterized in that: The vacuum tank assembly also has a limit block (15), which is detachably mounted on the inner wall of the tank body assembly (14) and faces the opening. When the tank cover assembly (6) follows the slider of the power slide (5) and moves toward the tank body assembly (14) to be close to the sealing ring (16), the tank cover assembly (6) and the tank body assembly (14) form a welding operation cavity (3-1). At this time, the collision block (10-1) on the workpiece support seat (10) is in hard contact with the limit block (15), and the positioning spring (11) is in a compressed state.

3. The workpiece loading and unloading and vacuum pumping mechanism for a vacuum laser welding machine according to claim 2 is 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.

4. The workpiece loading and unloading and vacuum pumping mechanism for a vacuum laser welding machine according to claim 1, characterized in that: The loading and unloading device also has at least one set of tank cover pressing components, which includes a rotary pressing 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 pressing 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 pressing cylinder (23) presses the tank cover plate (6-1) and the tank body assembly (14) together.

5. The workpiece loading and unloading and vacuum pumping mechanism for a vacuum laser welding machine according to claim 1, characterized in that: The loading and unloading device also has a can cover detection device, which is composed of at least two groups of photoelectric switch components (25). The photoelectric switch components (25) are adjustably mounted on the welding platform (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. The workpiece loading and unloading and vacuum pumping mechanism for 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 workpiece loading and unloading and vacuum pumping mechanism for a 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.

8. The workpiece loading and unloading and vacuum pumping mechanism for 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.

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