Laser welding fixture for frame production

Abstract

The present invention relates to a laser welding fixture for facilitating the production of a vehicle frame, comprising a support base, which is in a rectangular structure, and a rectangular groove is arranged on the right side of the upper end of the support base; and a stand pipe positioning assembly, which is installed in the rectangular groove on the right side of the upper end of the support base, and the stand pipe positioning assembly is configured to drive the stand pipe to translate and position; a fork frame feeding assembly, which is installed on the left side of the upper end of the support base, and the fork frame feeding assembly is configured to press the rear fork frame after feeding and drive the rear fork frame to move to fit with the side of the stand pipe; the present invention uses the stand pipe positioning assembly and the fork frame feeding assembly to cooperate with each other, so that the stand pipe and the rear fork frame can be automatically and accurately docked after the loading is completed, and the positioning effect is good and the positioning is accurate, which can not only ensure the accuracy of the docking between the rear fork frame and the stand pipe, but also ensure that the angle between the two rear fork frames and the stand pipe is consistent, which is convenient for the subsequent laser welding of the vehicle frame.

Description

Technical Field

[0001] The present application relates to the technical field of bicycle processing, and in particular to a laser welding fixture that facilitates the production of bicycle frames. Background Art

[0002] As the most critical structure of a bicycle, the bicycle frame connects and supports various components and plays an important role in the entire bicycle. Traditional bicycle frames are manufactured using welding processes and have multiple welds. After multiple welding processes and the welded joints are heat-affected zones, their fatigue resistance is reduced, which has a great impact on the overall mechanical properties of the frame.

[0003] The Chinese patent with publication number CN104759816A and titled "Specialized tooling for bicycle frame welding" specifically provides a support basis for bicycle frame welding processing through the first clamping device, the second clamping device, the third clamping device for fixing the five-way bracket of the frame, the fourth clamping device, and the fifth clamping device provided by the patent. The position of each clamping device on the bottom beam can be adjusted as needed, so it can adapt to the positioning and clamping requirements during the welding processing of bicycle frames of different lengths.

[0004] The above-mentioned prior art can also realize the function of welding a bicycle frame when in use. However, the above-mentioned prior art cannot accurately load the rear fork frame and the seat tube when welding the frame. The positioning effect of the rear fork frame and the seat tube is poor, and the rear fork frame and the seat tube need to be accurately connected manually. Moreover, the rear fork frame cannot be pressed and fixed after the connection, so that there may be a gap between the rear fork frame and the seat tube, which affects the overall stability of the frame after welding. Based on this, there is still room for improvement on the basis of the existing frame welding fixture. Summary of the invention

[0005] In order to accurately achieve the function of accurately docking the seat tube and the rear fork frame on the bicycle frame and facilitate accurate welding of the bicycle frame, the present application provides a laser welding fixture that is convenient for frame production.

[0006] The laser welding fixture provided in this application for facilitating the production of vehicle frames adopts the following technical solutions:

[0007] A laser welding fixture for frame production includes a support base having a rectangular structure and a rectangular groove on the right upper end of the support base; a seat tube positioning assembly installed in the rectangular groove on the right upper end of the support base, and the seat tube positioning assembly is configured to drive the seat tube to translate and position; a fork frame loading assembly installed on the left upper end of the support base, and the fork frame loading assembly is configured to press the rear fork frame after loading and drive the rear fork frame to move to fit with the side of the seat tube.

[0008] The riser positioning assembly includes a moving unit, a mounting plate, a first positioning unit, a fork frame positioning frame, a second positioning unit and an adsorption unit. The moving unit is installed in the rectangular groove, the mounting plate is installed on the upper end of the moving unit, the first positioning unit is installed on the left side of the mounting plate, the first positioning unit is used to insert and position the lower end of the riser, a fork frame positioning frame is installed on the right side of the mounting plate, the fork frame positioning frame is an isosceles trapezoidal structure, two groups of second positioning units are arranged on the inclined side of the fork frame positioning frame, the second positioning unit is used to press and position the rear fork frame, an adsorption unit is installed on the left side of the fork frame positioning frame, the adsorption unit is used to adsorb the riser and drive the riser to be tightly positioned with the middle of the fork frame feeding assembly.

[0009] Furthermore, the mobile unit includes a guide rail, a sliding frame, a gear shaft and a rack plate. The guide rail is symmetrically installed in the rectangular groove through bearings, a sliding frame is arranged in the rectangular groove, and a guide groove matching the guide rail is arranged on the sliding frame. A gear shaft is installed in the middle of the sliding frame through a bearing, and the upper end of the gear shaft is connected to the mounting plate. A rack plate is installed on the right side of the rectangular groove, and the rack plate is meshed with the gear shaft.

[0010] Furthermore, the sliding frame is evenly provided with plug holes, in which a retractable plug rod is arranged through a spring, the upper end of the plug rod is a smooth surface, and the lower end of the mounting plate is provided with a positioning hole that matches the plug rod.

[0011] Furthermore, the first positioning unit includes a positioning slot, a driving cylinder and a plug-in frame. The left side of the mounting plate is provided with a positioning slot, the front and rear sides of the positioning slot are respectively provided with driving cylinders, the top of the driving cylinder is provided with a plug-in frame, and the plug-in frame is plugged into and matched with the lower end of the vertical pipe.

[0012] Furthermore, the second positioning unit includes a clamping cylinder and a clamping frame. The clamping cylinder is installed on the side of the fork frame positioning frame. The top of the clamping cylinder is connected to the clamping frame through a flange. The inner side of the clamping frame is an arc-shaped structure. The clamping frame is used to clamp and fix the rear fork frame.

[0013] Furthermore, the adsorption unit includes a connecting rod and an adsorption frame, the connecting rods are evenly arranged on the left side of the fork frame positioning frame, the adsorption frame is installed between the left sides of the connecting rods, the cross-section of the adsorption frame is an arc-shaped structure, and the adsorption magnets are evenly arranged on the inner concave surface of the adsorption frame.

[0014] Furthermore, the fork frame feeding assembly includes a fixed frame, a pillar, a vertical pipe positioning frame, a turning unit, a fork frame template and a pressing unit. A fixed frame is installed on the left side of the upper end of the support base, pillars are evenly installed on the right side of the fixed frame, a vertical pipe positioning frame is installed between the right sides of the pillars, an arc groove that cooperates with the outer wall of the vertical pipe is provided in the middle of the vertical pipe positioning frame, a turning unit is installed between the outer side of the vertical pipe positioning frame and the fixed frame, the number of the turning units is two, a fork frame template is installed on the right side of the turning unit, and a pressing unit is installed on the outer side of the fork frame template.

[0015] Furthermore, the material turning unit includes a sliding groove, a sliding block, a connecting frame and a flipping cylinder. The sliding grooves are evenly arranged on the outside of the vertical pipe positioning frame, and a sliding block is slidably arranged in the sliding groove. A connecting frame is installed between the outer sides of the sliding blocks. A fork frame template is installed on the right side of the connecting frame by screws, and a flipping cylinder is evenly installed between the fixed frame and the connecting frame by a pin shaft.

[0016] Furthermore, the pressing unit includes a fixed sleeve, a slider, a guide rod, a pressure block and a limit frame. The fixed sleeve is installed on the outer side of the fork frame template. The middle part of the fixed sleeve is a hollow structure. A slider is slidably arranged in the middle part of the fixed sleeve. A through hole is arranged in the middle of the slider. A guide rod is slidably arranged inside the fixed sleeve. The guide rod is an inverted L-shaped structure. A pressure block is installed on the outside of the guide rod. A limit frame is installed at the lower end of the fixed sleeve. The limit frame is a cylindrical hollow structure. A limit groove is arranged on the inner concave surface of the limit frame. A limit column matching the limit groove is arranged on the upper end of the guide rod.

[0017] Furthermore, the limit groove includes vertical groove one, vertical groove two and two groups of inclined grooves. Vertical groove one and vertical groove two are symmetrically arranged on the inner wall of the limit frame. The length of vertical groove one is greater than the length of vertical groove two. The lower end of the vertical groove and the upper end of the vertical groove two, as well as the upper end of the vertical groove one and the lower end of the vertical groove two are connected by the inclined groove.

[0018] In the above technical scheme, the laser welding fixture provided by the present invention is convenient for the production of the frame. The present invention adopts the mutual cooperation between the seat tube positioning component and the fork frame feeding component, so that the seat tube and the rear fork frame can be automatically and accurately docked after the loading is completed, and the positioning effect is good and accurate. At the same time, when the seat tube and the rear fork frame are docked, the second positioning unit can further press the rear fork frame, and the rear fork frame can be accurately fitted with the fork frame template to prevent the rear fork frame from deforming and causing gaps in the welding. Moreover, the fork frame template is replaceable and can realize the function of loading and positioning rear fork frames of different sizes by changing the shape of the fork frame template. At the same time, after the fork frame template is flipped, it can be tightly attached to the surface of the fork frame positioning frame, so that the angles of the two rear fork frames can be accurately positioned, which can not only ensure the accuracy of the docking between the rear fork frame and the seat tube, but also ensure that the angles between the two rear fork frames and the seat tube are consistent, which is convenient for the subsequent laser welding of the frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is a three-dimensional structural schematic diagram of this application.

[0021] Figure 2 It is a schematic diagram of the cutaway structure of this application.

[0022] Figure 3 It is a schematic diagram of the three-dimensional structure between the support base and the riser positioning assembly of the present application.

[0023] Figure 4 It is a schematic diagram of the cross-section structure between the support base and the riser positioning assembly of the present application.

[0024] Figure 5 It is a top view between the support base and the riser positioning assembly of the present application.

[0025] Figure 6 It is a schematic diagram of the three-dimensional structure between the support base and the fork frame loading assembly of the present application.

[0026] Figure 7 It is a top view cross-sectional structural schematic diagram of the fork loading assembly of the present application.

[0027] Figure 8 It is a schematic diagram of the cross-sectional structure of the material pressing unit of the present application.

[0028] Fig. 9 It is a schematic diagram of the cross-sectional structure of the limiting frame of the present application.

[0029] Description of reference numerals: 1. support base; 2. riser positioning assembly; 21. moving unit; 211. guide rail; 212. sliding frame; 213. gear shaft; 214. rack plate; 22. mounting plate; 23. first positioning unit; 231. positioning groove; 232. driving cylinder; 233. plug-in frame; 24. fork frame positioning frame; 25. second positioning unit; 251. pressing cylinder; 252. pressing frame; 26. adsorption unit; 261. connecting rod; 262 , adsorption rack; 3, fork frame loading assembly; 31, fixed frame; 32, pillar; 33, vertical pipe positioning frame; 34, turning unit; 341, sliding groove; 342, sliding block; 343, connecting frame; 344, turning cylinder; 35, fork frame template; 36, pressing unit; 361, fixed sleeve; 362, slider; 363, guide rod; 364, pressing block; 365, limiting frame; 3651, vertical groove one; 3652, vertical groove two; 3653, inclined groove. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0031] See also Figure 1-9 The laser welding fixture provided in the embodiment of the present invention for facilitating the production of a vehicle frame includes a support base 1, which is in a rectangular structure, and a rectangular groove is provided on the upper right side of the support base 1; and a seat tube positioning assembly 2, which is installed in the rectangular groove on the upper right side of the support base 1, and the seat tube positioning assembly 2 is configured to drive the seat tube to translate and position; a fork frame loading assembly 3, which is installed on the upper left side of the support base 1, and the fork frame loading assembly 3 is configured to press the rear fork frame after loading and drive the rear fork frame to move to fit with the side of the seat tube.

[0032] In the above technical solution, before welding the seat tube and the rear fork frame, the seat tube is first placed inside the seat tube positioning assembly 2, and then the seat tube positioning assembly 2 drives the seat tube to move to the left, so that the seat tube can be tightly positioned with the middle of the fork frame loading assembly 3, and then the fork frame loading assembly 3 drives the rear fork frame to flip inward, so that the two rear fork frames can be accurately tightly attached to the seat tube. At the same time, the seat tube positioning assembly 2 can also limit the flipping angle of the fork frame loading assembly 3, so that the rear fork frame can accurately move to the position in contact with the seat tube, which is convenient for accurate welding between the rear fork frame and the seat tube.

[0033] See also Figure 2-Figure 5 As shown, the riser positioning assembly 2 includes a moving unit 21, a mounting plate 22, a first positioning unit 23, a fork frame positioning frame 24, a second positioning unit 25 and an adsorption unit 26. The moving unit 21 is installed in the rectangular groove, the mounting plate 22 is installed on the upper end of the moving unit 21, the first positioning unit 23 is installed on the left side of the mounting plate 22, the first positioning unit 23 is used to insert and position the lower end of the riser, a fork frame positioning frame 24 is installed on the right side of the mounting plate 22, the fork frame positioning frame 24 is an isosceles trapezoidal structure, two groups of second positioning units 25 are arranged on the inclined side of the fork frame positioning frame 24, the second positioning unit 25 is used to press and position the rear fork frame, and an adsorption unit 26 is installed on the left side of the fork frame positioning frame 24, the adsorption unit 26 is used to adsorb the riser and drive the riser to be tightly positioned with the middle of the fork frame feeding assembly 3.

[0034] When the moving unit 21 drives the mounting plate 22 to move to the rightmost end of the rectangular slot, the adsorption unit 26 is at the loading station. When the moving unit 21 drives the mounting plate 22 to move to the leftmost end of the rectangular slot, the adsorption unit 26 is at the welding station.

[0035] In the above technical solution, when the adsorption unit 26 moves to the loading station, the vertical pipe is first placed in the middle of the adsorption unit 26, and the adsorption unit 26 can adsorb and fix the vertical pipe. At the same time, the first positioning unit 23 will insert and position the two sides of the lower end of the vertical pipe. After that, the moving unit 21 drives the vertical pipe to move to the left. When the adsorption unit 26 moves to the welding station, the adsorption unit 26 drives the vertical pipe and the fork frame loading assembly 3 to be tightly positioned, so that the vertical pipe can be accurately in the welding position. When the fork frame loading assembly 3 drives the rear fork frame to flip inward, the rear fork frame can be tightly attached to the surface of the fork frame positioning frame 24, and the second positioning unit 25 moves inward to press and position the rear fork frame, so that the rear fork frame can be accurately attached to the vertical pipe, which is conducive to accurate welding between the rear fork frame and the vertical pipe.

[0036] See also Figure 2-Figure 4 As shown, as the preferred technical solution of this embodiment, the mobile unit 21 includes a guide rail 211, a sliding frame 212, a gear shaft 213 and a rack plate 214. The guide rail 211 is symmetrically installed in the rectangular groove through bearings, the sliding frame 212 is arranged in the rectangular groove, and the sliding frame 212 is provided with a guide groove that cooperates with the guide rail 211. A gear shaft 213 is installed in the middle of the sliding frame 212 through a bearing, and the upper end of the gear shaft 213 is connected to the mounting plate 22. A rack plate 214 is installed on the right side of the rectangular groove, and the rack plate 214 is meshed with the gear shaft 213.

[0037] In the above technical solution, the guide rail 211 can drive the sliding frame 212 to move horizontally back and forth. When the gear shaft 213 contacts the rack plate 214, the rack plate 214 will drive the gear shaft 213 to rotate by gear meshing. The gear shaft 213 can drive the mounting plate 22 to rotate synchronously. Then, when the mounting plate 22 moves to the loading station, the adsorption unit 26 can rotate outward under the drive of the mounting plate 22, which is convenient for loading the riser and removing the riser after low welding; when the mounting plate 22 moves to the welding station, the mounting plate 22 drives the adsorption unit 26 to reset, so that the riser can be accurately positioned, which is convenient for welding between the riser and the rear fork frame.

[0038] As a preferred technical solution of this embodiment, the sliding frame 212 is evenly provided with plug-in holes, and a retractable plug-in rod is arranged in the plug-in hole through a spring. The plug-in hole and the plug-in rod are not shown in the figure. The upper end of the plug-in rod is a smooth surface, and the lower end of the mounting plate 22 is provided with a positioning hole that cooperates with the plug-in rod.

[0039] In the above technical solution, when the gear shaft 213 and the rack plate 214 are meshed, the mounting plate 22 will rotate, the insertion rod will be forced to shrink inward, and the insertion rod will be separated from the positioning hole, so that the mounting plate 22 can rotate accurately. When the mounting plate 22 is restored, the insertion rod moves outward and is accurately plugged into the positioning hole, so that the mounting plate 22 can be accurately reset, thereby ensuring the accuracy of the riser positioning.

[0040] See also Figure 5 As shown, as a preferred technical solution of this embodiment, the first positioning unit 23 includes a positioning slot 231, a driving cylinder 232 and a plug-in frame 233. The mounting plate 22 is provided with a positioning slot 231 on the left side, and driving cylinders 232 are respectively installed on the front and rear sides of the positioning slot 231. A plug-in frame 233 is installed on the top of the driving cylinder 232, and the plug-in frame 233 is plugged into and matched with the lower end of the vertical pipe.

[0041] In the above technical solution, when the riser is loaded, the lower end of the riser is first placed on the upper end of the positioning groove 231, and then the driving cylinder 232 drives the plug-in frame 233 to move inward, so that the plug-in frame 233 can be accurately plugged and matched with the lower end of the riser, thereby realizing the function of accurately positioning the riser, and then ensuring the consistency of the welding position between the riser and the rear fork frame.

[0042] See also Figure 3 As shown, as the preferred technical solution of this embodiment, the second positioning unit 25 includes a clamping cylinder 251 and a clamping frame 252. The clamping cylinder 251 is installed on the side of the fork frame positioning frame 24. The top of the clamping cylinder 251 is connected to the clamping frame 252 through a flange. The inner side surface of the clamping frame 252 is an arc structure. The clamping frame 252 is used to clamp and fix the rear fork frame.

[0043] In the above technical solution, when the fork frame loading assembly 3 drives the rear fork frame to move to the position where it fits with the surface of the fork frame positioning frame 24, the clamping cylinder 251 drives the clamping frame 252 to move inward, so that the clamping frame 252 can clamp the rear fork frame, so that the rear fork frame can accurately fit with the vertical pipe, avoiding the gap between the rear fork frame and the vertical pipe during welding.

[0044] See also Figure 3 As shown, as a preferred technical solution of this embodiment, the adsorption unit 26 includes a connecting rod 261 and an adsorption frame 262, the connecting rods 261 are evenly arranged on the left side of the fork frame positioning frame 24, and the adsorption frame 262 is installed between the left sides of the connecting rods 261. The cross-section of the adsorption frame 262 is an arc-shaped structure, and adsorption magnets are evenly arranged on the inner concave surface of the adsorption frame 262.

[0045] In the above technical solution, after the vertical tube is loaded, the arc structure on the inner side of the vertical tube and the adsorption frame 262 is on the same axis, so that there is no gap between the vertical tube and the adsorption frame 262. At the same time, the adsorption magnet can adsorb and fix the vertical tube, which is convenient for loading and unloading the vertical tube.

[0046] See also Figure 6-Figure 9As shown, as the preferred technical solution of this embodiment, the fork frame feeding assembly 3 includes a fixed frame 31, a pillar 32, a vertical pipe positioning frame 33, a turning unit 34, a fork frame template 35 and a pressing unit 36. The fixed frame 31 is installed on the left side of the upper end of the support base 1, and the pillars 32 are evenly installed on the right side of the fixed frame 31. The vertical pipe positioning frame 33 is installed between the right sides of the pillars 32. The middle part of the vertical pipe positioning frame 33 is provided with an arc groove that cooperates with the outer wall of the vertical pipe. The turning unit 34 is installed between the outer side of the vertical pipe positioning frame 33 and the fixed frame 31. The number of the turning units 34 is two. The fork frame template 35 is installed on the right side of the turning unit 34, and the pressing unit 36 ​​is installed on the outer side of the fork frame template 35.

[0047] In the above technical solution, when the rear fork frame needs to be loaded, the turning unit 34 drives the fork frame template 35 to open, so that the two fork frame templates 35 are in a vertically open state, and the rear fork frame is fixed on the outside of the fork frame template 35. The pressing unit 36 ​​presses and fixes the rear fork frame to prevent the rear fork frame from shaking. Afterwards, the turning unit 34 drives the fork frame template 35 to turn over, so that the two fork frame templates 35 are turned over to the surface of the fork frame positioning frame 24, and then the two rear fork frames can be accurately positioned to ensure that the two rear fork frames can be accurately and tightly attached to the seat tube, which is conducive to accurate welding between the rear fork frame and the seat tube.

[0048] It should be noted that the fork frame template 35 is detachable. When welding different types of rear fork frames, the function of welding different types of rear fork frames can be achieved by changing the shape of the fork frame template 35. During welding, the inner side of the rear fork frame can be tightly attached to the fork frame template 35, so that the rear fork frame will not be deformed, thereby ensuring the accuracy of welding.

[0049] At the same time, a plurality of detection sensors are arranged on the outer periphery of the fork frame template 35. The rear fork frame may have certain deformation before welding. If there is a gap between the rear fork frame and the outer side of the fork frame template 35, the detection sensor will sound an alarm. At this time, the second positioning unit 25 will further press the rear fork frame. If the detection sensor still sounds an alarm, manual inspection of the rear fork frame is required.

[0050] See also Figure 7 As shown, as the preferred technical solution of this embodiment, the material turning unit 34 includes a sliding groove 341, a sliding block 342, a connecting frame 343 and a flipping cylinder 344, the sliding groove 341 is evenly arranged on the outside of the vertical pipe positioning frame 33, the sliding block 342 is slidably arranged in the sliding groove 341, the connecting frame 343 is installed between the outer sides of the sliding block 342, the fork frame template 35 is installed on the right side of the connecting frame 343 by screws, and the flipping cylinder 344 is evenly installed between the fixed frame 31 and the connecting frame 343 by a pin shaft.

[0051] In the above technical solution, the sliding block 342 slides inside the sliding groove 341. When the flip cylinder 344 contracts, the flip cylinder 344 is driven to move to the left along the sliding groove 341 through the connecting frame 343, so that the connecting frame 343 can drive the fork frame template 35 to open, which is convenient for accurate loading of the rear fork frame. When the flip cylinder 344 is pushed out, the flip cylinder 344 is driven to move to the right along the sliding groove 341 through the connecting frame 343. The two fork frame templates 35 move synchronously and are tightly attached to the surface of the fork frame positioning frame 24, which is convenient for accurate positioning of the rear fork frame.

[0052] See also Figure 7-Figure 8 As shown, as the preferred technical solution of this embodiment, the pressing unit 36 ​​includes a fixed sleeve 361, a slider 362, a guide rod 363, a pressure block 364 and a limit frame 365. The fixed sleeve 361 is installed on the outer surface of the fork frame template 35. The middle part of the fixed sleeve 361 is a hollow structure. A slider 362 is slidably arranged in the middle part of the fixed sleeve 361. A through hole is arranged in the middle of the slider 362. A guide rod 363 is slidably arranged in the fixed sleeve 361. The guide rod 363 is an inverted L-shaped structure. A pressure block 364 is installed on the outside of the guide rod 363. A limit frame 365 is installed at the lower end of the fixed sleeve 361. The limit frame 365 is a cylindrical hollow structure. A limit groove is arranged on the inner concave surface of the limit frame 365, and a limit column matching the limit groove is arranged on the upper end of the guide rod 363.

[0053] Continue reading Fig. 9 As shown, as a preferred technical solution of this embodiment, the limit groove includes a vertical groove 1 3651, a vertical groove 2 3652 and two groups of inclined grooves 3653, and the vertical groove 1 3651 and the vertical groove 2 3652 are symmetrically arranged on the inner wall of the limit frame 365, the length of the vertical groove 1 3651 is greater than the length of the vertical groove 2 3652, the lower end of the vertical groove 1 3651 and the upper end of the vertical groove 2 3652 as well as the upper end of the vertical groove 1 3651 and the lower end of the vertical groove 2 3652 are connected by the inclined groove 3653, and the inclined groove 3653 is arranged on the inner wall of the limit frame 365.

[0054] In the above technical solution, the slider 362 can drive the guide rod 363 to reciprocate inside the fixed sleeve 361, and the inner side of the guide rod 363 slides inside the limit groove through the limit column. When the pressure block 364 presses the rear fork frame, the limit column slides downward inside the vertical groove 3652, and the guide rod 363 can drive the pressure block 364 to press the rear fork frame, so that the rear fork frame can be fixed on the fork frame template 35; when the rear fork frame is welded, the limit column is in the vertical groove 365 2 moves upward inside. At this time, the limiting column moves from the bottom of the second vertical slot 3652 to the upper end of the first vertical slot 3651 through the inclined slot 3653. The limiting column drives the pressing block 364 to flip 180 degrees through the guide rod 363. When the limiting column moves downward along the vertical slot, the pressing block 364 can just shrink to the inside of the fork frame template 35 to prevent the guide rod 363 from protruding from the outer periphery of the fork frame template 35, ensuring that the guide rod 363 will not interfere in the subsequent material taking process of the fork frame template 35.

[0055] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. Laser welding fixture for frame production, characterized by: include: The support base (1) has a rectangular structure, and a rectangular groove is provided on the right side of the upper end of the support base (1); as well as A standpipe positioning assembly (2), which is installed in a rectangular groove on the right side of the upper end of the support base (1), and the standpipe positioning assembly (2) is configured to drive the standpipe to translate and position; A fork frame loading assembly (3) is mounted on the left side of the upper end of the support base (1), and the fork frame loading assembly (3) is configured to press the fork frame after loading and drive the fork frame to move to fit with the side of the stand pipe; The stand pipe positioning assembly (2) comprises a moving unit (21), a mounting plate (22), a first positioning unit (23), a fork frame positioning frame (24), a second positioning unit (25) and an adsorption unit (26). The moving unit (21) is installed in the rectangular groove. The mounting plate (22) is installed on the upper end of the moving unit (21). The first positioning unit (23) is installed on the left side of the mounting plate (22). The first positioning unit (23) is used to insert and position the lower end of the stand pipe. The fork frame positioning frame (24) is installed on the right side of the mounting plate (22). The fork frame positioning frame (24) is an isosceles trapezoidal structure. Two groups of second positioning units (25) are arranged on the inclined side of the fork frame positioning frame (24). The second positioning unit (25) is used to press and position the rear fork frame. The adsorption unit (26) is installed on the left side of the fork frame positioning frame (24). The adsorption unit (26) is used to adsorb the stand pipe and drive the stand pipe to be tightly positioned with the middle part of the fork frame feeding assembly (3). The fork frame feeding assembly (3) comprises a fixed frame (31), a support column (32), a vertical pipe positioning frame (33), a material turning unit (34), a fork frame template (35) and a material pressing unit (36); the fixed frame (31) is installed on the left side of the upper end of the support base (1); the support columns (32) are evenly installed on the right side of the fixed frame (31); the vertical pipe positioning frame (33) is installed between the right sides of the support columns (32); the middle part of the vertical pipe positioning frame (33) is provided with an arc groove matched with the outer wall of the vertical pipe; the material turning unit (34) is installed between the outer side of the vertical pipe positioning frame (33) and the fixed frame (31); the number of the material turning units (34) is two; the fork frame template (35) is installed on the right side of the material turning unit (34); and the material pressing unit (36) is installed on the outer side of the fork frame template (35); The material pressing unit (36) comprises a fixed sleeve (361), a slider (362), a guide rod (363), a pressure block (364) and a limiting frame (365). The fixed sleeve (361) is installed on the outer side of the fork frame template (35). The middle part of the fixed sleeve (361) is a hollow structure. A slider (362) is slidably arranged in the middle part of the fixed sleeve (361). A through hole is arranged in the middle part of the slider (362). A guide rod (363) is slidably arranged in the fixed sleeve (361). The guide rod (363) is an inverted L-shaped structure. A pressure block (364) is installed on the outer side of the guide rod (363). A limiting frame (365) is installed at the lower end of the fixed sleeve (361). The limiting frame (365) is a cylindrical hollow structure. A limiting groove is arranged on the inner concave surface of the limiting frame (365). A limiting column matching the limiting groove is arranged on the upper end of the guide rod (363). The limiting grooves include a vertical groove 1, a vertical groove 2 and two groups of inclined grooves. The vertical groove 1 and the vertical groove 2 are symmetrically arranged on the inner wall of the limiting frame (365). The length of the vertical groove 1 is greater than the length of the vertical groove 2. The lower end of the vertical groove and the upper end of the vertical groove 2 and the upper end of the vertical groove 1 and the lower end of the vertical groove 2 are connected by the inclined grooves. The inclined grooves are arranged on the inner wall of the limiting frame (365).

2. The laser welding fixture for facilitating frame production according to claim 1 is characterized in that: The mobile unit (21) comprises a guide rail (211), a sliding frame (212), a gear shaft (213) and a rack plate (214); the guide rail (211) is symmetrically mounted in the rectangular groove via a bearing; the sliding frame (212) is arranged in the rectangular groove; a guide groove matched with the guide rail (211) is arranged on the sliding frame (212); a gear shaft (213) is mounted in the middle of the sliding frame (212) via a bearing; the upper end of the gear shaft (213) is connected to the mounting plate (22); a rack plate (214) is mounted on the right side of the rectangular groove; the rack plate (214) is meshed with the gear shaft (213).

3. The laser welding fixture for facilitating frame production according to claim 2 is characterized in that: The sliding frame (212) is evenly provided with plug holes, in which a retractable plug rod is arranged via a spring, the upper end of the plug rod is a smooth surface, and the lower end of the mounting plate (22) is provided with a positioning hole matched with the plug rod.

4. The laser welding fixture for facilitating frame production according to claim 1 is characterized in that: The first positioning unit (23) comprises a positioning slot (231), a driving cylinder (232) and a plug-in frame (233); the mounting plate (22) is provided with a positioning slot (231) on the left side; driving cylinders (232) are respectively installed on the front and rear sides of the positioning slot (231); a plug-in frame (233) is installed on the top end of the driving cylinder (232); and the plug-in frame (233) is plugged into and matched with the lower end of the vertical pipe.

5. The laser welding fixture for facilitating frame production according to claim 1 is characterized in that: The second positioning unit (25) comprises a clamping cylinder (251) and a clamping frame (252); the clamping cylinder (251) is installed on the side of the fork frame positioning frame (24); the top end of the clamping cylinder (251) is connected to the clamping frame (252) via a flange; the inner side surface of the clamping frame (252) is an arc-shaped structure; the clamping frame (252) is used to clamp and fix the rear fork frame.

6. The laser welding fixture for facilitating frame production according to claim 1 is characterized in that: The adsorption unit (26) comprises a connecting rod (261) and an adsorption frame (262); the connecting rod (261) is evenly arranged on the left side surface of the fork frame positioning frame (24); the adsorption frame (262) is installed between the left sides of the connecting rod (261); the cross section of the adsorption frame (262) is an arc-shaped structure; and adsorption magnets are evenly arranged on the inner concave surface of the adsorption frame (262).

7. The laser welding fixture for facilitating frame production according to claim 1 is characterized in that: The material turning unit (34) comprises a sliding groove (341), a sliding block (342), a connecting frame (343) and a turning cylinder (344); the sliding groove (341) is evenly arranged on the outside of the vertical pipe positioning frame (33); a sliding block (342) is slidably arranged in the sliding groove (341); a connecting frame (343) is installed between the outsides of the sliding block (342); a fork frame template (35) is installed on the right side of the connecting frame (343) by screws; and a turning cylinder (344) is evenly installed between the fixing frame (31) and the connecting frame (343) by a pin shaft.

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