Worktable support structure for quick-change welding robot production line and operation method thereof

Abstract

The workbench bearing structure of the quick-change welding robot production line and the operation method thereof belong to the technical field of welding and comprise a bottom frame, a workbench, a speed chain assembly, a start button, a protection grating, a left mold locking cylinder, a right mold locking cylinder, a positioning cylinder, a jacking cylinder assembly, a bearing assembly, a workbench support frame and a bottom sliding structure. The workbench support frame comprises a frame main body, an upper support plate and a lower support plate. The bottom sliding structure is arranged between the left jacking cylinder and the right jacking cylinder in the middle of the bottom frame in the left-right direction above and at the rear side of the bottom frame. The sliding cylinder is arranged above the bottom frame in the left-right direction, and the cylinder rod of the sliding cylinder extends to the left. The workbench bearing structure has the advantages of stable support, low abrasion and quick replacement.

Description

Technical Field

[0001] This invention relates to a workbench support structure for welding equipment and its operating method, particularly to a workbench support structure and its operating method for a quick-change welding robot production line, belonging to the field of welding technology. Background Technology

[0002] In the application of automated welding production lines, when encountering situations such as large products, a large number of welding points, and large welding loads, the traditional method of using aluminum profiles on both sides to support the worktable via a double-speed chain has significant drawbacks: (1) Unstable product condition: When the product is large, the size of the workbench increases accordingly. The middle part has no effective support, and the welding pressure causes the bottom plate of the workbench to collapse and deform, resulting in changes in the product position. (2) Welding equipment is prone to wear: There are many welding points, the welding pressure is high, and the aluminum profile support strength is insufficient. As the usage time goes by, the aluminum profile and the double speed chain are prone to wear, resulting in high maintenance costs for the equipment in the later stage. (3) When the product is large, the process of changing the workbench is complicated. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing workbench support structures for welding equipment, such as unstable product condition, easy wear and tear of welding equipment, and complex workbench replacement process, by providing a quick-change workbench support structure for welding robot production lines, which can achieve stable support, resistance to wear, and rapid replacement.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is: a workbench for a quick-change welding robot production line. The supporting structure includes a base frame, a worktable, a speed chain assembly, a start button, a protective light curtain, a left mold-locking cylinder, a right mold-locking cylinder, a positioning cylinder, a lifting cylinder assembly, and a supporting assembly. The upper left side of the base frame has a left speed chain mounting slot, and the upper right side of the base frame has a right speed chain mounting slot. Both the left and right speed chain mounting slots are arranged in a front-to-back direction. The speed chain assembly includes a left speed chain and a right speed chain. The left speed chain is installed in the left speed chain mounting slot, and the right speed chain is installed in the right speed chain mounting slot. The worktable is positioned above the base frame, with its left side supported on the left speed chain and its right side supported on the right speed chain. The lifting cylinder assembly includes a left lifting cylinder located in the middle of the left side of the base frame and a right lifting cylinder located in the middle of the right side of the base frame; the support assembly includes four auxiliary spring connecting seats located at the four corners of the base frame; the start button is located on the control panel on one side of the welding equipment; the protective light grid is located around the workbench; and the left and right mold-locking cylinders are located on the left and right sides behind the workbench, respectively. It also includes a workbench support frame and a bottom sliding structure. The workbench support frame includes a frame body, upper support plates disposed on the left and right sides of the frame body, and lower support plates disposed on the left and right sides of the frame body. The workbench support frame is located below the workbench and above the lifting cylinder assembly and the support assembly. The positioning cylinder is located on the rear side of the workbench support frame and next to the auxiliary spring connecting seat. The bottom sliding structure is arranged in a left-right direction between the support connecting seat above and behind the bottom frame and the left and right lifting cylinders in the middle of the bottom frame; the bottom sliding structure includes a left sliding support block, a right sliding support block, several slider rail assemblies, a sliding cylinder, a left cylinder connecting block, a right cylinder connecting block and a pin. The left sliding support block is located on the left side of the bottom frame and the right side of the left double speed chain, and the right sliding support block is located on the right side of the bottom frame and the left side of the right double speed chain; several slider and slide rail assemblies are evenly divided into 2 groups, and the 2 groups are located on the left and right sides of the bottom frame. Each slider and slide rail assembly includes 1 slide rail and 1 slider. The slide rail is fixedly set on the bottom frame in the left and right direction, and the slider is set on the slide rail and is slidably connected to each other. The lower part of the left sliding support block protrudes to the right and is provided with several left support block connecting parts, which are respectively set on several sliders on the left side of the bottom frame and fixedly connected; the lower part of the right sliding support block protrudes to the left and is provided with several right support block connecting parts, which are respectively set on several sliders on the right side of the bottom frame and fixedly connected. The sliding cylinder is positioned above the base frame in a left-right direction, with the cylinder rod extending to the left. The left end of the left cylinder connecting block is fixedly connected to a left support block connecting part located on the left side of the base frame, and the right end of the left cylinder connecting block is fixedly connected to the left end of the cylinder rod. The left end of the right cylinder connecting block is connected to the right end of the sliding cylinder by a pin, and the right end of the right cylinder connecting block is fixedly connected to a right support block connecting part on the right side of the base frame. Initial state: The cylinder rod extends to the left, the left cylinder connecting block connects to the left support block via the left support block connecting part, so that the left support block is on the left side of the workbench support frame, and the right cylinder connecting block connects to the right support block via the right support block connecting part, so that the right support block is on the right side of the workbench support frame; the workbench support frame rests on the auxiliary spring connecting seat, and the workbench is mounted on the left and right double speed chains; Working state: The cylinder rod retracts to the right, and the left cylinder connecting block, through the left support block connecting part, positions the left support block below the lower support plate on the left side of the frame body. The right cylinder connecting block, through the right support block connecting part, positions the right support block below the lower support plate on the right side of the frame body. At this time, the left and right lifting cylinders start to lift upward, pushing the worktable support frame upward. The worktable support frame, in turn, pushes the worktable upward from the left and right double-speed chains through the upper support plate. A gap is formed between the worktable and the left and right double-speed chains. The left and right support blocks, through the worktable support frame, provide complete support for the worktable, ensuring the supporting function of the welding equipment on the production line in the working state.

[0005] The left and right speed chain mounting slots are symmetrically arranged, and the tops of the left and right speed chains are higher than the upper surface of the bottom frame.

[0006] The left lifting cylinder includes a lifting cylinder body, a connecting insert, and a connecting fixing block. A lifting rod is fixedly installed at the center of the lifting cylinder body, the connecting insert is sleeved on the lifting rod, and the connecting fixing block is sleeved on the outside of the connecting insert. The right lifting cylinder has the same structure as the left lifting cylinder and is symmetrically arranged on the left and right.

[0007] The auxiliary spring connecting seat includes a fixed seat, a bearing seat, an optical shaft, and an auxiliary spring. The bearing seat is disposed inside the fixed seat, the optical shaft is disposed inside the bearing seat, and the auxiliary spring is sleeved on the optical shaft.

[0008] The workbench support frame also includes two lifting fixing blocks and two workbench positioning pins. The two lifting fixing blocks are respectively located on the upper left and right ends of the workbench support frame, and the two positioning pins are fixed on the workbench support frame. When the left lifting cylinder and the right lifting cylinder lift the workbench support frame upward, the lifting fixing blocks are inserted and connected to the workbench, and play a positioning role for the workbench.

[0009] The bottom sliding structure includes eight slider rail assemblies, which are divided into two groups of four, located on the left and right sides of the bottom frame. The lower part of the left sliding support block protrudes to the right and has four left support block connecting parts, which are respectively mounted on the four sliders on the left side of the bottom frame and fixedly connected. The lower part of the right sliding support block protrudes to the left and has four right support block connecting parts, which are respectively mounted on the four sliders on the right side of the bottom frame and fixedly connected. The left and right sliding support blocks are symmetrically arranged.

[0010] The operation method of the workbench support structure of the quick-change welding robot production line includes the following working process: (1) The double speed chain rotates in a cycle. The employee puts the product in place, clicks the start button, the protective light curtain is activated, the mold locking cylinder is opened, and the workbench moves to the welding station with the double speed chain. The workbench support frame is supported by four auxiliary spring connecting seats located at the four corners of the bottom frame. (2) The positioning cylinder opens, the lifting cylinder lifts the worktable through the worktable support frame, and then the sliding cylinder pulls the left and right support blocks to the bottom of the worktable support frame. At this time, the worktable disengages from the speed doubler chain and moves above the left and right sliding support blocks. Then, the lifting cylinder falls back slightly, so that the worktable is supported on the left and right sliding support blocks. The optical shafts of the four auxiliary spring connecting seats push the worktable support frame under the action of the auxiliary springs and play an auxiliary support role. The welding equipment starts welding until it ends. (3) The sliding cylinder returns, the lifting cylinder returns, the worktable falls onto the double speed chain, the worktable support frame falls completely on the four auxiliary spring connecting seats, the optical axis retracts downward, the positioning cylinder returns, and the worktable moves to the next station with the double speed chain.

[0011] Compared with the prior art, the beneficial effects of the present invention are: (1) Stable product condition: When the product is large, the worktable receives effective support from the left and right sliding support blocks. The support ensures that the workbench will not collapse or deform during welding, the product position can be maintained correctly, and the welding quality is guaranteed. (2) Long service life of welding equipment: During welding, the worktable is transferred from the double-speed chain support on both sides to the sliding support in the middle of the bottom frame. The equipment is supported by a moving support block and a workbench support frame, and is further supported by an auxiliary spring connecting seat aluminum profile. The overall support is sturdy and not prone to wear, resulting in low maintenance costs in the later stages of the equipment. (3) Changing the workbench is simple and quick. Attached Figure Description

[0012] Figure 1 Yes: The initial state main view of this structure; Figure 2 yes: Figure 1 Enlarged view of part A; Figure 3 Yes: Main view of the working state of this structure; Figure 4 yes: Figure 3 Enlarged view of part B; Figure 5 Yes: Exploded view of the bottom structure of the workbench (including the bottom sliding structure); Figure 6 Yes: 3D view of the workbench support frame; Figure 7 Yes: Exploded view of the bottom sliding structure; Figure 8yes: Figure 5 Enlarged view of part C; Figure 9 Yes: Exploded view of the left lifting cylinder; Figure 10 Yes: Exploded view of the auxiliary spring connector.

[0013] Explanation of reference numerals in the attached drawings: 1. Base frame; 2. Worktable; 3. Positioning cylinder; 4. Left double-speed chain mounting slot; 5. Right double-speed chain mounting slot; 6. Left double-speed chain; 7. Right double-speed chain; 8. Left lifting cylinder; 801. Lifting cylinder body; 802. Connecting insert; 803. Connecting fixing block; 804. Lifting rod; 9. Right lifting cylinder; 10. Auxiliary spring connecting seat; 10. Fixing seat; 1001. Bearing seat; 1002. Optical shaft; 1003. Auxiliary spring; 1004. Worktable support frame; 11. Frame body; 1101. Upper support plate 1102, lower support plate 1103, lifting fixing block 1104, positioning pin 1105, bottom sliding structure 12, left sliding support block 1201, right sliding support block 1202, slider and slide rail assembly 1203, slide rail 120301, slider 120302, sliding cylinder 1204, left cylinder connecting block 1205, right cylinder connecting block 1206, pin 1207, left sliding support block connecting part 1208, right sliding support block connecting part 1209. Detailed Implementation

[0014] The technical solutions of the embodiments of the present invention will be clearly and completely explained below with reference to the accompanying drawings. The embodiments described herein are clearly only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0015] like Figures 1 to 10 As shown, the workbench support structure of the quick-change welding robot production line, such as Figures 1 to 5 As shown, the system includes a base frame 1, a worktable 2, a speed chain assembly, a start button (not shown), a protective light curtain, a left mold-locking cylinder (not shown), a right mold-locking cylinder (not shown), a positioning cylinder 3, a lifting cylinder assembly, and a support assembly. The upper left side of the base frame 1 has a left speed chain mounting groove 4, and the upper right side of the base frame 1 has a right speed chain mounting groove 5. Both the left and right speed chain mounting grooves 4 and 5 are arranged in a front-to-back direction. The speed chain assembly includes a left speed chain 6 and a right speed chain 7. The left speed chain 6 is installed in the left speed chain mounting groove 4, and the right speed chain 7 is installed in the right speed chain mounting groove 5. The worktable 2 is positioned above the base frame 1, with its left side supported on the left speed chain 6 and its right side supported on the right speed chain 7. like Figure 5 As shown, the lifting cylinder assembly includes a left lifting cylinder 8 located in the middle of the left side of the base frame 1 and a right lifting cylinder 9 located in the middle of the right side of the base frame 1; the support assembly includes four auxiliary spring connecting seats 10 located at the twelve corners of the base frame 1; the start button (not shown in the figure) is located on the control panel (not shown in the figure) on one side of the welding equipment; the protective light grid (not shown in the figure) is located around the workbench 2; and the left mold-locking cylinder (not shown in the figure) and the right mold-locking cylinder (not shown in the figure) are respectively located on the left and right sides (not shown in the figure) behind the workbench 2. like Figures 5 to 7 As shown, it also includes a workbench support frame 11 and a bottom sliding structure 12. The workbench support frame 11 includes a frame body 1101, upper support plates 1102 disposed on the left and right sides of the frame body 1101, and lower support plates 1103 disposed on the left and right sides of the frame body 1101. The workbench support frame 11 is located below the workbench 2 and above the lifting cylinder assembly and the support assembly. The positioning cylinder 3 is located on the rear side of the workbench support frame 11 and next to the auxiliary spring connecting seat 10. like Figure 5 and Figure 7 As shown, the bottom sliding structure 12 is arranged in a left-right direction above the bottom frame 1, between the support connecting seat on the rear side and the left lifting cylinder 8 and right lifting cylinder 9 in the middle of the bottom frame 1; the bottom sliding structure 12 includes a left sliding support block 1201, a right sliding support block 1202, eight slider rail assemblies 1203, a sliding cylinder 1204, a left cylinder connecting block 1205, a right cylinder connecting block 1206, and a pin 1207; like Figure 2 , Figure 4 and Figure 5 As shown, the left sliding support block 1201 is located on the left side of the bottom frame 1 and the right side of the left double-speed chain 6, and the right sliding support block 1202 is located on the right side of the bottom frame 1 and the left side of the right double-speed chain 7; the eight slider rail assemblies 1203 are evenly divided into two groups, which are located on the left and right sides of the bottom frame 1. Each slider rail assembly 1203 includes one rail 120301 and one slider 120302. The rail 120301 is fixedly mounted on the bottom frame 1 in the left and right direction, and the slider 120302 is mounted on the rail 120301 and is slidably connected to each other. like Figure 7 and Figure 8As shown, the lower part of the left sliding support block 1201 protrudes to the right and is provided with four left support block connecting parts 1208. The four left support block connecting parts 1208 are respectively set on the four sliders 120302 on the left side of the bottom frame 1 and are fixedly connected. The lower part of the right sliding support block 1202 protrudes to the left and is provided with four right support block connecting parts 1209. The four right support block connecting parts 1209 are respectively set on the four sliders 120302 on the right side of the bottom frame 1 and are fixedly connected. like Figure 7 and Figure 8 As shown, the sliding cylinder 1204 is positioned above the base frame 1 in a left-right direction, with the cylinder rod of the sliding cylinder 1204 extending to the left; the left end of the left cylinder connecting block 1205 is fixedly connected to a left support block connecting part 1208 located on the left side of the base frame 1, and the right end of the left cylinder connecting block 1205 is fixedly connected to the left end of the cylinder rod; the left end of the right cylinder connecting block 1206 is connected to the right end of the sliding cylinder 1204 by a pin 1207, and the right end of the right cylinder connecting block 1206 is fixedly connected to a right support block connecting part 1209 on the right side of the base frame 1; Initial state: such as Figure 1 and Figure 2 As shown, the cylinder rod extends to the left, and the left cylinder connecting block 1205, through the left support block connecting part 1208, positions the left support block on the left side of the workbench support frame 11. The right cylinder connecting block 1206, through the right support block connecting part 1209, positions the right support block on the right side of the workbench support frame 11. The workbench support frame 11 rests on the auxiliary spring connecting seat 10, and the workbench 2 is mounted on the left double speed chain 6 and the right double speed chain 7. Working status: such as Figure 3 and Figure 4 As shown, the cylinder rod retracts to the right, and the left cylinder connecting block 1205, through the left support block connecting part 1208, positions the left support block below the left lower support plate 1103 of the frame body 1101. The right cylinder connecting block 1206, through the right support block connecting part 1209, positions the right support block below the right lower support plate 1103 of the frame body 1101. At this time, the left lifting cylinder 8 and the right lifting cylinder 9 start to lift upward, pushing the workbench support frame 11 upward. The workbench support frame 11, in turn, pushes the workbench 2 upward from the left double-speed chain 6 and the right double-speed chain 7 through the upper support plate 1102. A gap is formed between the workbench 2 and the left double-speed chain 6 and the right double-speed chain 7. The left and right support blocks, through the workbench support frame 11, provide complete support for the workbench 2, ensuring the supporting function of the welding equipment on the production line for the workbench 2 in the working state.

[0016] like Figure 1 , Figure 3 and Figure 5As shown, the left double speed chain mounting slot 4 and the right double speed chain mounting slot 5 are symmetrically arranged on the left and right sides, and the tops of the left double speed chain 6 and the right double speed chain 7 are higher than the upper surface of the bottom frame 1.

[0017] like Figure 5 and Figure 9 As shown, the left lifting cylinder 8 includes a lifting cylinder body 801, a connecting insert 802, and a connecting fixing block 803. A lifting rod 804 is fixedly installed at the center of the lifting cylinder body 801, the connecting insert 802 is sleeved on the lifting rod 804, and the connecting fixing block 803 is sleeved on the outside of the connecting insert 802. The right lifting cylinder 9 has the same structure as the left lifting cylinder 8 and is symmetrically arranged on the left and right.

[0018] like Figure 5 and Figure 10 As shown, the auxiliary spring connecting seat 10 includes a fixed seat 1001, a bearing seat 1002, an optical axis 1003 and an auxiliary spring 1004. The bearing seat 1002 is disposed in the fixed seat 1001, the optical axis 1003 is disposed in the bearing seat 1002, and the auxiliary spring 1004 is sleeved on the optical axis 1003.

[0019] like Figure 6 As shown, the workbench support frame 11 also includes two lifting fixing blocks 1104 and two workbench 2 positioning pins 1105. The two lifting fixing blocks 1104 are respectively located above the left and right ends of the workbench support frame 11, and the two positioning pins 1105 are fixed on the workbench support frame. When the left lifting cylinder 8 and the right lifting cylinder 9 lift the workbench support frame upward, the lifting fixing blocks 1104 are inserted and connected to the workbench 2 and play a positioning role for the workbench 2.

[0020] like Figure 7 As shown, the bottom sliding structure 12 includes eight slider rail assemblies 1203. The eight slider rail assemblies 1203 are divided into two groups of four, each group being disposed on the left and right sides of the bottom frame 1. The lower part of the left sliding support block 1201 protrudes to the right and is provided with four left support block connecting parts 1208. The four left support block connecting parts 1208 are respectively disposed on the four sliders 120302 on the left side of the bottom frame 1 and are fixedly connected. The lower part of the right sliding support block 1202 protrudes to the left and is provided with four right support block connecting parts 1209. The four right support block connecting parts 1209 are respectively disposed on the four sliders 120302 on the right side of the bottom frame 1 and are fixedly connected. The left sliding support block 1201 and the right sliding support block 1202 are arranged symmetrically on the left and right sides.

[0021] The operation method of the workbench support structure of the quick-change welding robot production line includes the following working process: (1) The double speed chain assembly rotates in a cycle. The employee puts the product in place and clicks the start button (not shown in the figure). The protective light grid is activated, the mold locking cylinder is opened, and the workbench 2 moves to the welding station with the double speed chain assembly. The workbench support frame 11 is supported by 4 auxiliary spring connecting seats 10 located at the corners of the bottom frame 12. (2) Positioning cylinder 3 is opened, lifting cylinder lifts worktable 2 through worktable support frame 11, then sliding cylinder 1204 pulls left support block and right support block to the bottom of worktable support frame 11. At this time, worktable 2 is disengaged from the speed doubler chain and moves above left sliding support block 1201 and right sliding support block 1202. Then, lifting cylinder slightly falls back, so that worktable 2 is supported on left sliding support block 1201 and right sliding support block 1202. The optical shaft 1003 of the four auxiliary spring connecting seats 10 is pushed up to worktable support frame 11 under the action of auxiliary spring 1004, playing an auxiliary support role. Welding equipment starts welding until the end. (3) The sliding cylinder 1204 returns, the lifting cylinder returns, the worktable 2 falls onto the double speed chain, the worktable support frame 11 falls completely on the four auxiliary spring connecting seats 10, the optical axis 1003 retracts downward, the positioning cylinder 3 returns, and the worktable 2 moves to the next station with the double speed chain.

[0022] The embodiments described above are merely preferred embodiments of the present invention. Ordinary variations and substitutions made by those skilled in the art within the scope of the technical solutions of the present invention should be included within the protection scope of the present invention.

Claims

1. A workbench support structure for a quick-change welding robot production line, comprising a base frame, a workbench, a speed-multiplying chain assembly, a start button, a protective light curtain, a left mold-locking cylinder, a right mold-locking cylinder, a positioning cylinder, a lifting cylinder assembly, and a support assembly; the upper left side of the base frame is provided with a left speed-multiplying chain mounting groove, and the upper right side of the base frame is provided with a right speed-multiplying chain mounting groove, both the left and right speed-multiplying chain mounting grooves being arranged in a front-back direction; the speed-multiplying chain assembly includes a left speed-multiplying chain and a right speed-multiplying chain, the left speed-multiplying chain being installed in the left speed-multiplying chain mounting groove, and the right speed-multiplying chain being installed in the right speed-multiplying chain mounting groove; the workbench is positioned above the base frame, with the left side of the workbench supported on the left speed-multiplying chain and the right side of the workbench supported on the right speed-multiplying chain; The lifting cylinder assembly includes a left lifting cylinder located in the middle of the left side of the base frame and a right lifting cylinder located in the middle of the right side of the base frame; the support assembly includes four auxiliary spring connecting seats located at the four corners of the base frame; the start button is located on the control panel on one side of the welding equipment; the protective light grid is located around the workbench; the left and right mold-locking cylinders are respectively located on the left and right sides behind the workbench, characterized in that: It also includes a workbench support frame and a bottom sliding structure. The workbench support frame includes a frame body, upper support plates disposed on the left and right sides of the frame body, and lower support plates disposed on the left and right sides of the frame body. The workbench support frame is located below the workbench and above the lifting cylinder assembly and the support assembly. The positioning cylinder is located on the rear side of the workbench support frame and next to the auxiliary spring connecting seat. The bottom sliding structure is arranged in a left-right direction between the support connecting seat above and behind the bottom frame and the left and right lifting cylinders in the middle of the bottom frame; the bottom sliding structure includes a left sliding support block, a right sliding support block, several slider rail assemblies, a sliding cylinder, a left cylinder connecting block, a right cylinder connecting block and a pin. The left sliding support block is located on the left side of the bottom frame and the right side of the left double speed chain, and the right sliding support block is located on the right side of the bottom frame and the left side of the right double speed chain; several slider and slide rail assemblies are evenly divided into 2 groups, and the 2 groups are located on the left and right sides of the bottom frame. Each slider and slide rail assembly includes 1 slide rail and 1 slider. The slide rail is fixedly set on the bottom frame in the left and right direction, and the slider is set on the slide rail and is slidably connected to each other. The lower part of the left sliding support block protrudes to the right and has several left sliding support block connecting parts, which are respectively set on several sliders on the left side of the bottom frame and fixedly connected; the lower part of the right sliding support block protrudes to the left and has several right sliding support block connecting parts, which are respectively set on several sliders on the right side of the bottom frame and fixedly connected. The sliding cylinder is positioned horizontally above the base frame, with its cylinder rod extending to the left. The left end of the left cylinder connecting block is fixedly connected to a left sliding support block connecting part located on the left side of the base frame, and the right end of the left cylinder connecting block is fixedly connected to the left end of the cylinder rod of the sliding cylinder. The left end of the right cylinder connecting block is connected to the right end of the sliding cylinder by a pin, and the right end of the right cylinder connecting block is fixedly connected to a right sliding support block connecting part on the right side of the base frame. Initial state: The cylinder rod of the sliding cylinder extends to the left, the left cylinder connecting block is connected to the left sliding support block to the left side of the workbench support frame, and the right cylinder connecting block is connected to the right sliding support block to the right side of the workbench support frame; the workbench support frame rests on the auxiliary spring connecting seat, and the workbench is mounted on the left and right double speed chains; Working state: The cylinder rod of the sliding cylinder retracts to the right. The left cylinder connecting block, through the left sliding support block connecting part, positions the left sliding support block below the lower support plate on the left side of the frame body. The right cylinder connecting block, through the right sliding support block connecting part, positions the right sliding support block below the lower support plate on the right side of the frame body. At this time, the left and right lifting cylinders start to lift upward, pushing the worktable support frame upward. The worktable support frame, in turn, pushes the worktable upward from the left and right double-speed chains through the upper support plate. A gap is formed between the worktable and the left and right double-speed chains. The left and right sliding support blocks provide complete support for the worktable through the worktable support frame. The bottom sliding structure includes eight slider rail assemblies, which are divided into two groups of four, located on the left and right sides of the bottom frame. The lower part of the left sliding support block protrudes to the right and has four left sliding support block connecting parts, which are respectively mounted on the four sliders on the left side of the bottom frame and fixedly connected. The lower part of the right sliding support block protrudes to the left and has four right sliding support block connecting parts, which are respectively mounted on the four sliders on the right side of the bottom frame and fixedly connected. The left and right sliding support blocks are symmetrically arranged.

2. The workbench support structure of the quick-change welding robot production line according to claim 1, characterized in that: The left and right speed chain mounting slots are symmetrically arranged, and the tops of the left and right speed chains are higher than the upper surface of the bottom frame.

3. The workbench support structure of the quick-change welding robot production line according to claim 1, characterized in that: The left lifting cylinder includes a lifting cylinder body, a connecting insert, and a connecting fixing block. A lifting rod is fixedly installed at the center of the lifting cylinder body, the connecting insert is sleeved on the lifting rod, and the connecting fixing block is sleeved on the outside of the connecting insert. The right lifting cylinder has the same structure as the left lifting cylinder and is symmetrically arranged on the left and right.

4. The workbench support structure of the quick-change welding robot production line according to claim 1, characterized in that: The auxiliary spring connecting seat includes a fixed seat, a bearing seat, an optical shaft, and an auxiliary spring. The bearing seat is disposed inside the fixed seat, the optical shaft is disposed inside the bearing seat, and the auxiliary spring is sleeved on the optical shaft.

5. The workbench support structure of the quick-change welding robot production line according to claim 1, characterized in that: The workbench support frame also includes two lifting fixing blocks and two workbench positioning pins. The two lifting fixing blocks are respectively located on the upper left and right ends of the workbench support frame, and the two positioning pins are fixed on the workbench support frame. When the left lifting cylinder and the right lifting cylinder lift the workbench support frame upward, the lifting fixing blocks are inserted and connected to the workbench.

6. The operating method of the workbench support structure of the quick-change welding robot production line according to claim 1, characterized in that: The operation method of the workbench support structure of the quick-change welding robot production line includes the following working process: (1) The double speed chain assembly rotates in a cycle. The employee puts the product in place, clicks the start button, the protective light curtain is activated, the mold locking cylinder is opened, and the workbench moves to the welding station with the double speed chain assembly. The workbench support frame is supported by four auxiliary spring connecting seats located at the four corners of the bottom frame. (2) The positioning cylinder opens, the lifting cylinder lifts the worktable through the worktable support frame, and then the sliding cylinder pulls the left and right sliding support blocks to the bottom of the worktable support frame. At this time, the worktable disengages from the speed doubler chain and moves above the left and right sliding support blocks. Then, the lifting cylinder falls back slightly, so that the worktable is supported on the left and right sliding support blocks. The optical shafts of the four auxiliary spring connecting seats push the worktable support frame under the action of the auxiliary springs and play an auxiliary support role. The welding equipment starts welding until it ends. (3) The sliding cylinder returns, the lifting cylinder returns, the worktable falls onto the double speed chain, the worktable support frame falls completely on the four auxiliary spring connecting seats, the optical axis retracts downward, the positioning cylinder returns, and the worktable moves to the next station with the double speed chain.

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