Clamp tool and automobile rear subframe welding workstation

Abstract

The present application relates to a kind of fixture tooling and automobile rear subframe welding workstation.The fixture tooling includes workbench and multiple clamping mechanisms mounted on workbench;The clamping mechanism includes first clamping mechanism for clamping front cross beam and rear cross beam, second clamping mechanism for clamping front cross beam, third clamping mechanism and fourth clamping mechanism for clamping left side rail, right side rail, fifth clamping mechanism for clamping middle cross beam and sixth clamping mechanism for clamping rear suspension mounting bracket.By setting twelve clamping points on the workpiece to be welded, then each clamping point is applied to a clamping mechanism, so that the workpiece to be clamped is better fixed, and the automobile front subframe welding workstation using the fixture tooling proposed by the present application can make the welding robot weld the workpiece more smoothly and improve the welding efficiency of the welding robot.

Description

Technical Field

[0001] This invention relates to the field of welding technology, and in particular to a fixture and a welding workstation for automotive rear subframes. Background Technology

[0002] The existing automotive rear subframe consists of a front crossbeam, a right longitudinal beam, a rear crossbeam, a left longitudinal beam, and a middle crossbeam, wherein both ends of the front crossbeam and the rear crossbeam are provided with a rear subframe mounting bushing.

[0003] The front crossbeam, right longitudinal beam, rear crossbeam, left longitudinal beam, and middle crossbeam are placed sequentially into a welding workstation and fixed with fixtures. Then, a welding robot in the welding workstation welds them together. The finished workpiece is the front subframe of the car.

[0004] The fixture consists of a worktable and multiple clamping mechanisms fixed on the worktable. The multiple clamping mechanisms are used to fix the corresponding workpieces to be clamped. However, the arrangement of the multiple clamping mechanisms on the existing fixture is messy, which can sometimes even affect the welding robot's welding of the workpieces. Summary of the Invention

[0005] In view of this, the present invention provides a fixture that can rationally arrange multiple clamping mechanisms to better fix the workpiece to be clamped. The present invention also provides a welding workstation for automotive rear subframes, which enables welding robots to weld workpieces more smoothly and improves the welding efficiency of the welding robot.

[0006] To achieve one or more of the above objectives or other objectives, the present invention provides a fixture tooling, including a worktable and a plurality of clamping mechanisms mounted on the worktable.

[0007] The clamping mechanism includes a first clamping mechanism, a second clamping mechanism, a third clamping mechanism, a fourth clamping mechanism, a fifth clamping mechanism, and a sixth clamping mechanism;

[0008] The first and second clamping mechanisms are both used to clamp the front crossbeam; the first clamping mechanism can also be used to clamp the rear crossbeam; the third and fourth clamping mechanisms are both used to clamp the left and right longitudinal beams; the fifth clamping mechanism is used to clamp the middle crossbeam; and the sixth clamping mechanism is used to clamp the rear suspension mounting bracket.

[0009] Furthermore, the first clamping mechanism, the second clamping mechanism, the third clamping mechanism, the fourth clamping mechanism, the fifth clamping mechanism, and the sixth clamping mechanism are all detachably connected to the worktable.

[0010] Furthermore, there are four first clamping mechanisms, each of which includes a first telescopic drive device, an expansion pin, a first clamping drive device, and a first pressure arm; wherein the bottom wall of the first telescopic drive device and the bottom wall of the first clamping drive device are both connected to the top wall of the worktable;

[0011] The output end of each of the first telescopic drive devices is connected to the bottom of the corresponding expansion pin, and the first telescopic drive device can control the expansion pin to move vertically telescopically.

[0012] The output end of each of the first clamping drive devices is connected to one end of the corresponding first pressure arm, and the other end of the first pressure arm is provided with a first pressure block; each of the first clamping drive devices can control the first pressure block to move toward the corresponding expansion pin.

[0013] Furthermore, there is one second clamping mechanism, which includes a second clamping drive device, a second pressure arm, and a support seat; the bottom wall of the second clamping drive device and the bottom wall of the support seat are both connected to the top wall of the worktable;

[0014] The output end of the second clamping drive device is connected to one end of the second pressure arm, and the other end of the second pressure arm is provided with a second pressure block; the second clamping drive device can control the second pressure block to move toward the support seat.

[0015] Furthermore, there are two third clamping mechanisms, each of which includes a third clamping drive device, a third pressure arm, a third telescopic drive device, a third positioning pin, and a third limiting seat; the bottom wall of the third clamping drive device and the bottom wall of the third telescopic drive device are both connected to the top wall of the worktable.

[0016] The output end of the third telescopic drive device is connected to the bottom wall of the third positioning pin, and the output end of the third telescopic drive device is also connected to the bottom of the third limiting seat. The third telescopic drive device can control the expansion pin and the third limiting seat to move vertically.

[0017] The output end of the third clamping drive device is connected to one end of the third pressure arm, and the other end of the third pressure arm is provided with a third pressure block; each of the third clamping drive devices can control the third pressure block to move toward the corresponding third positioning pin.

[0018] Furthermore, there are two fourth clamping mechanisms, each of which includes a fourth clamping drive device, a fourth pressure arm, a fourth fixed seat, a fourth positioning pin, a fourth limiting seat, and a sensor; the bottom wall of the fourth clamping drive device and the bottom wall of the fourth fixed seat are both connected to the top wall of the worktable;

[0019] The output end of the fourth fixed seat is connected to the bottom wall of the fourth positioning pin. The fourth fixed seat is also connected to one side of the fourth fixed seat. A sensor is provided on the side of the fourth positioning pin away from the fourth positioning pin.

[0020] The output end of the fourth clamping drive device is connected to one end of the fourth pressure arm, and the other end of the fourth pressure arm is provided with a fourth pressure block; each of the fourth clamping drive devices can control the fourth pressure block to move toward the corresponding fourth positioning pin.

[0021] Furthermore, there are two fifth clamping mechanisms, each of which includes a fifth fixed base, a fifth pressure arm A, a fifth positioning pin A, a fifth telescopic drive device, a fifth pressure arm B, and a fifth positioning pin B; the bottom wall of the fifth telescopic drive device and the bottom wall of the fifth fixed base are both connected to the top wall of the worktable;

[0022] The top wall of the fifth fixed seat is connected to one end of the fifth pressure arm A, and the other end of the fifth pressure arm A is provided with a fifth positioning pin A;

[0023] The output end of the fifth telescopic drive device is connected to one end of the fifth pressure arm B, and the other end of the fifth pressure arm B is provided with a fifth positioning pin B; each of the fifth telescopic drive devices can control the fifth positioning pin B to move toward the corresponding fifth positioning pin A.

[0024] Furthermore, there is one sixth clamping mechanism, which includes a sixth clamping drive device, a sixth pressure arm, and a sixth limiting seat; the bottom wall of the sixth clamping drive device and the bottom wall of the sixth limiting seat are both connected to the top wall of the worktable;

[0025] The output end of the sixth clamping drive device is connected to one end of the sixth pressure arm, and the other end of the sixth pressure arm is provided with a sixth pressure block.

[0026] The sixth clamping drive device can control the sixth pressure block to move toward the sixth limiting seat.

[0027] A welding workstation for a rear subframe of an automobile includes the fixtures and tooling described above, as well as a workstation body, a three-axis positioner and a welding robot.

[0028] The three-axis positioner is installed on the bottom wall of the workstation body, and two welding robots are arranged side by side on one side of the three-axis positioner;

[0029] The three-axis positioner includes a horizontal central axis and two working axes parallel to the central axis. The side of the three-axis positioner facing the welding robot is the welding side, and the other side of the three-axis positioner away from the welding robot is the preparation side. The two working axes are symmetrically arranged on both sides of the central axis and rotate around the axis of the central axis, so that the working axes can rotate from the preparation side to the welding side, or from the welding side to the preparation side.

[0030] Both the preparation side and the welding side are rotatably mounted with a fixture, which rotates around the corresponding working shaft.

[0031] Each of the welding robots is equipped with a welding torch for welding workpieces held in the worktable on the welding side.

[0032] Implementing the embodiments of the present invention will have the following beneficial effects:

[0033] The present invention proposes a fixture that can better fix the workpiece to be clamped by setting twelve clamping points on the workpiece to be welded, and then clamping each clamping point with a clamping mechanism. The automotive front subframe welding workstation proposed in this invention can make the welding robot weld the workpiece more smoothly and improve the welding efficiency of the welding robot. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] in:

[0036] Figure 1 This is a schematic diagram of the fixture in this application;

[0037] Figure 2 This is a structural schematic diagram of the rear subframe of the automobile in this application;

[0038] Figure 3 This is a schematic diagram showing the distribution of clamping points on the rear subframe of the vehicle in this application;

[0039] Figure 4 The diagram shows the structure of the clamping mechanism in this application, where a is the structure of the first clamping mechanism, b is the structure of the second clamping mechanism, c is the structure of the third clamping mechanism, d is the structure of the fourth clamping mechanism, e is the structure of the fifth clamping mechanism, and f is the structure of the sixth clamping mechanism.

[0040] Figure 5 This is a top view of the automotive rear subframe welding workstation described in this application;

[0041] Figure 6 This is a schematic diagram of the structure of the three-axis positioner in this application;

[0042] Figure 7 This is a schematic diagram of the connection structure between the locking plate and the mounting base in this application.

[0043] Reference numerals: 1. Fixture; 10. Worktable; 11. Locking plate; 111. Locking port; 20. Clamping mechanism; 21. First clamping mechanism; 22. Second clamping mechanism; 23. Third clamping mechanism; 24. Fourth clamping mechanism; 25. Fifth clamping mechanism; 26. Sixth clamping mechanism; A. Clamping point;

[0044] 2. Rear subframe of automobile; 2-26. Front crossbeam; 27. Right longitudinal beam; 28. Rear crossbeam; 29. ​​Left longitudinal beam; 30. Middle crossbeam; 31. Rear suspension mounting bracket; 32. Rear subframe mounting bushing; 33. Third through hole; 34. Fifth through hole;

[0045] 3. Automobile rear subframe welding workstation; 4. Workstation body; 5. Three-axis positioner; 51. Central shaft; 52. Working shaft; 53. Mounting base; 531. Receiving boss; 532. Locking column; 533. Pressure plate; 6. Welding robot; 7. Main control panel; 8. Welding control box;

[0046] 211. First telescopic drive device; 212. Expansion pin; 213. First clamping drive device; 214. First pressure arm; 215. First pressure block;

[0047] 221. Second clamping drive device; 222. Second pressure arm; 223. Support seat; 224. Second pressure block;

[0048] 231. Third clamping drive device; 232. Third pressure arm; 233. Third telescopic drive device; 234. Third positioning pin; 235. Third limit seat; 236. Third pressure block;

[0049] 241. Fourth clamping drive device; 242. Fourth pressure arm; 243. Fourth fixed base; 244. Fourth positioning pin; 245. Fourth limit seat; 246. Fourth pressure block; 247. Sensor;

[0050] 251. Fifth fixed seat; 252. Fifth pressure arm A; 253. Fifth positioning pin A; 254. Fifth telescopic drive device; 255. Fifth pressure arm B; 256. Fifth positioning pin B;

[0051] 261. Sixth clamping drive device; 262. Sixth pressure arm; 263. Sixth limit seat; 264. Sixth pressure block. Detailed Implementation

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the specification is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings are used to distinguish different objects and not to describe a particular order.

[0053] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0054] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0055] As one embodiment, refer to the appendix Figure 1-4 A fixture 1 includes a workbench 10 and a plurality of clamping mechanisms 20 mounted on the workbench 10; the clamping mechanisms 20 include a first clamping mechanism 21, a second clamping mechanism 22, a third clamping mechanism 23, a fourth clamping mechanism 24, a fifth clamping mechanism 25 and a sixth clamping mechanism 26.

[0056] The first clamping mechanism 21 and the second clamping mechanism 22 are both used to clamp the front crossbeam 2-26; the first clamping mechanism 21 can also be used to clamp the rear crossbeam 28; the third clamping mechanism 23 and the fourth clamping mechanism 24 are both used to clamp the left longitudinal beam 29 and the right longitudinal beam 27; the fifth clamping mechanism 25 is used to clamp the middle crossbeam 30; and the sixth clamping mechanism 26 is used to clamp the rear suspension mounting bracket 31.

[0057] In this embodiment, the rear subframe 2 of the automobile and the top wall or above of the component workpiece refer to the side of the rear subframe 2 of the automobile facing away from the worktable 10; the bottom wall or below of the rear subframe 2 of the automobile and the component workpiece refer to the side of the rear subframe 2 of the automobile facing the worktable 10.

[0058] See attached document Figure 2 The front crossbeam 2-26, right longitudinal beam 27, rear crossbeam 28, left longitudinal beam 29, and middle crossbeam 30 are sequentially welded to form the rear subframe 2 of the vehicle. The front crossbeam 2-26, right longitudinal beam 27, rear crossbeam 28, and left longitudinal beam 29 are welded to form a closed trapezoid. The middle part of the rear crossbeam 28 is welded to one end of the rear suspension mounting bracket 31, and the other end of the rear suspension mounting bracket 31 is welded to the middle part of the middle crossbeam 30. The two ends of the middle crossbeam 30 are respectively welded to the corresponding left longitudinal beam 29 and right longitudinal beam 27. A rear subframe mounting bushing 32 is provided at both ends of the rear crossbeam 28 and the front crossbeam 2-26. A third through hole 33 is provided at the end of the left longitudinal beam 29 and the right longitudinal beam 27 near the rear crossbeam 28. A fifth through hole 34 is provided at both ends of the middle crossbeam 30. There are four rear subframe mounting bushings 32, all of which are hollow cylindrical.

[0059] See attached document Figure 1-3 Each of the four rear subframe mounting bushings 32 has a clamping point A; the middle section of the front crossbeams 2-26 each has a clamping point A; each of the two third through holes 33 has a clamping point A; each of the two fifth through holes 34 has a clamping point A; the right longitudinal beam 27 and the left longitudinal beam 29, at the end away from the third through hole 33, each have a clamping point A; and the middle section of the rear suspension mounting bracket 31 has a clamping point A. There are a total of twelve clamping points A, each corresponding to a clamping mechanism. When the workpiece constituting the rear subframe 2 is correctly placed on the worktable 10, the clamping mechanism will clamp the corresponding workpiece at the corresponding clamping point A. This allows for better fixation of the workpiece with fewer clamping mechanisms, reducing investment costs.

[0060] As one embodiment, refer to the appendix Figure 4 There are four first clamping mechanisms 21. Each first clamping mechanism 21 includes a first telescopic drive device 211, a cylindrical expansion pin 212, a first clamping drive device 213, and a first pressure arm 214. The bottom wall of the first telescopic drive device 211 and the bottom wall of the first clamping drive device 213 are connected to the top wall of the worktable 10.

[0061] The output end of each of the first telescopic drive devices 211 is connected to the bottom of the corresponding expansion pin 212. The first telescopic drive device 211 can control the expansion pin 212 to move vertically, that is, the first telescopic drive device 211 can control the expansion pin 212 to extend from below the rear subframe 2 into the corresponding rear subframe mounting bushing 32 and then expand, thereby fixing the rear crossbeam 28 and the front crossbeam 2-26 with the rear subframe mounting bushing 32.

[0062] The output end of each of the first clamping drive devices 213 is connected to one end of the corresponding first pressure arm 214, and the other end of the first pressure arm 214 is provided with a first pressure block 215; each of the first clamping drive devices 213 can control the first pressure block 215 to move toward the corresponding expansion pin 212, thereby causing the first pressure block 215 to cooperate with the corresponding expansion pin 212 to clamp the two ends of the front crossbeam 2-26 and the rear crossbeam 28.

[0063] There is one second clamping mechanism 22, which includes a second clamping drive device 221, a second pressure arm 222 and a support seat 223; the bottom wall of the second clamping drive device 221 and the bottom wall of the support seat 223 are both connected to the top wall of the worktable 10, wherein the top wall of the support seat 223 can abut against the bottom wall of the middle part of the front crossbeam 2-26.

[0064] The output end of the second clamping drive device 221 is connected to one end of the second pressure arm 222, and the other end of the second pressure arm 222 is provided with a second pressure block 224; the second clamping drive device 221 can control the second pressure block 224 to move toward the support seat 223, that is, the second clamping drive device 221 controls the second pressure block 224 to cooperate with the support seat 223 to clamp the middle part of the front crossbeam 2-26.

[0065] There are two third clamping mechanisms 23. Each third clamping mechanism 23 includes a third clamping drive device 231, a third pressure arm 232, a third telescopic drive device 233, a third positioning pin 234, and a third limiting seat 235. The bottom wall of the third clamping drive device 231 and the bottom wall of the third telescopic drive device 233 are both connected to the top wall of the worktable 10.

[0066] The output end of the third telescopic drive device 233 is connected to the bottom wall of the third positioning pin 234, and the output end of the third telescopic drive device 233 is also connected to the bottom of the third limiting seat 235. The third telescopic drive device 233 can control the third positioning pin 234 and the third limiting seat 235 to move vertically. The third positioning pin 234 can extend into the third through hole 33.

[0067] The output end of the third clamping drive device 231 is connected to one end of the third pressure arm 232, and the other end of the third pressure arm 232 is provided with a third pressure block 236; each of the third clamping drive devices 231 can control the third pressure block 236 to move toward the corresponding third positioning pin 234, that is, each of the third clamping drive devices 231 can control the third pressure block 236 to cooperate with the corresponding third limiting seat 235 to clamp the left longitudinal beam 29 and the right longitudinal beam 27.

[0068] There are two fourth clamping mechanisms 24. Each fourth clamping mechanism 24 includes a fourth clamping drive device 241, a fourth pressure arm 242, a fourth fixed seat 243, a fourth positioning pin 244, and a fourth limiting seat 245. The bottom wall of the fourth clamping drive device 241 and the bottom wall of the fourth fixed seat 243 are both connected to the top wall of the worktable 10.

[0069] The output end of the fourth fixing seat 243 is connected to the bottom wall of the fourth positioning pin 244; the fourth fixing seat 243 is also connected to the fourth limiting seat 245 on one side, and a sensor 247 is provided on the side of the fourth positioning pin 244 away from the fourth limiting seat 245; wherein the sensor 247 is a photoelectric sensor, and the fourth positioning pin 244 can abut against the bottom wall of the corresponding longitudinal beam.

[0070] The output end of the fourth clamping drive device 241 is connected to one end of the fourth pressure arm 242, and the other end of the fourth pressure arm 242 is provided with a fourth pressure block 246; each of the fourth clamping drive devices 241 can control the fourth pressure block 246 to move toward the corresponding fourth positioning pin 244, that is, the fourth clamping drive device 241 controls the fourth pressure block 246 to cooperate with the corresponding fourth limiting seat 245 to clamp the left longitudinal beam 29 and the right longitudinal beam 27.

[0071] There are two fifth clamping mechanisms 25. Each fifth clamping mechanism 25 includes a fifth fixed base 251, a fifth pressure arm A252, a fifth positioning pin A253, a fifth telescopic drive device 254, a fifth pressure arm B255, and a fifth positioning pin B256. The bottom wall of the fifth telescopic drive device 254 and the bottom wall of the fifth fixed base 251 are both connected to the top wall of the worktable 10.

[0072] The top wall of the fifth fixed seat 251 is connected to one end of the fifth pressure arm A252, and the other end of the fifth pressure arm A252 is provided with a fifth positioning pin A253; wherein the fifth positioning pin A253 can extend into the interior of the corresponding fifth through hole 34 from one side.

[0073] The output end of the fifth telescopic drive device 254 is connected to one end of the fifth pressure arm B255, and the other end of the fifth pressure arm B255 is provided with a fifth positioning pin B256; each of the fifth telescopic drive devices 254 can control the fifth positioning pin B256 to move toward the corresponding fifth pressure arm A252; that is, the fifth telescopic drive device 254 can control the fifth positioning pin B256 to extend into the interior of the fifth through hole 34 from the other side, thereby causing the fifth pressure arm B255 to cooperate with the corresponding fifth pressure arm A252 to clamp the middle crossbeam 30.

[0074] There is one sixth clamping mechanism 26, which includes a sixth clamping drive device 261, a sixth pressure arm 262 and a sixth limiting seat 263; the bottom wall of the sixth clamping drive device 261 and the bottom wall of the sixth limiting seat 263 are both connected to the top wall of the worktable 10.

[0075] The output end of the sixth clamping drive device 261 is connected to one end of the sixth pressure arm 262, and the other end of the sixth pressure arm 262 is provided with a sixth pressure block 264; the sixth clamping drive device 261 can control the sixth pressure arm 262 to move toward the sixth limiting seat 263; wherein the top of the sixth limiting seat 263 can abut against the bottom wall of the rear suspension mounting bracket 31, and the sixth clamping drive device 261 can control the sixth pressure block 264 to cooperate with the sixth limiting seat 263 to clamp the rear suspension mounting bracket 31.

[0076] In this embodiment, the first telescopic drive device 211, the third telescopic drive device 233 and the fifth telescopic drive device 254 are all telescopic cylinders. The telescopic cylinder can control its output end and the expansion pin 212 and positioning pin connected to the output end to move toward or away from the corresponding rear subframe 2 of the vehicle.

[0077] The first clamping drive device 213, the second clamping drive device 221, the third clamping drive device 231, the fourth clamping drive device 241, and the sixth clamping drive device 261 are all clamping cylinders. Each clamping cylinder can control its output end to open and close toward the rear subframe 2 of the vehicle, thereby causing the pressure arm connected to the output end to open and close toward the rear subframe 2 of the vehicle, and consequently causing the pressure block connected to the corresponding pressure arm to open and close toward the rear subframe 2 of the vehicle, enabling the pressure block to clamp or release the rear subframe 2 of the vehicle.

[0078] As one embodiment, refer to the appendix Figure 5 The present invention also provides a welding workstation 3 for automotive rear subframe using the above-mentioned fixture 1, and further includes a workstation body 4, a three-axis positioner 5 and a welding robot 6.

[0079] The three-axis positioner 5 is installed on the bottom wall of the workstation body 4. Two welding robots 6 are arranged side by side on one side of the three-axis positioner 5. The three-axis positioner 5 includes a horizontal central axis 51 and two working axes 52 parallel to the central axis 51. The side of the three-axis positioner 5 facing the welding robots 6 is the welding side, and the other side of the three-axis positioner 5 away from the welding robots 6 is the preparation side. The two working axes 52 are symmetrically arranged on both sides of the central axis 51 and rotate around the axial direction of the central axis 51, so that the working axes 52 can rotate from the preparation side to the welding side, or from the welding side to the preparation side. Both the preparation side and the welding side are rotatably mounted with a fixture, which rotates around the corresponding working axis 52. Each welding robot 6 is equipped with a welding torch, which is used to weld the workpiece held by the worktable 10 on the welding side.

[0080] In this embodiment, the automotive rear subframe welding workstation 3 is rectangular in shape. The automotive rear subframe welding workstation 3 also includes a main control panel 7 and a welding control box 8. The main control panel 7 is located on one outer wall of the workstation body 4, which is away from the welding robot 6. The welding control box 8 is located on another outer wall of the workstation body 4, which is away from the main control panel 7.

[0081] The welding control box 8 is used to control the welding action, welding path, welding sequence, etc. of the welding robot 6. The main control panel 7 can control the rotation of the three-axis positioner 5 and the opening and closing of multiple clamping mechanisms 20 on the fixture 1. The main control panel 7 can also be electrically connected to the welding control box 8. By operating the main control panel 7, instructions are sent to the welding control box 8 to make the welding control box 8 control the welding robot 6 to work.

[0082] When loading parts on the preparation side (industry terminology), it refers to correctly placing the workpieces that make up the rear subframe 2 of the automobile onto the worktable 10. Expansion pins 212, the third positioning pin 234, the fourth positioning pin 244, and the fifth positioning pin A253 are all engaged or abutted against the corresponding workpieces. Then, the clamping block of the clamping mechanism is connected to the clamping point A of the corresponding workpiece, firmly clamping it. Afterwards, the three-axis positioner 5 rotates, moving the worktable 10 from the preparation side to the welding side, allowing the welding robot 6 to weld the workpiece. During the welding process, the worktable 10 also rotates, better exposing the weld seam for the welding robot 6 to weld, enabling smoother welding and improving its efficiency. Meanwhile, the other worktable 10, originally on the welding side, rotates to the preparation side, where the worker loads parts. This separates the loading and welding cycles of the automobile rear subframe welding workstation 3, preventing interference and improving its production efficiency.

[0083] There are two welding robots 6, located at opposite ends of the welding workbench 10. The two welding robots 6 improve welding efficiency within the automotive rear subframe welding workstation 3, reducing the time required to weld one automotive rear subframe 2.

[0084] In this embodiment, refer to the appendix. Figure 6-7 The three-axis positioner 5 and the worktable 10 are detachable at both ends. Each end of the worktable 10 is provided with a locking plate 11. Each end of the two sides of the three-axis positioner 5 is provided with a mounting seat 53, which can be matched and connected with the corresponding locking plate 11.

[0085] Both ends of the locking plate 11 are provided with locking holes 111, and both locking holes 111 extend toward the center of the locking plate 11. The mounting base 53 is provided with a receiving boss 531 perpendicular to the mounting base 53. Both ends of the receiving boss 531 are rotatably provided with locking pins 532. The rotation plane of the locking pins 532 is parallel to the mounting base 53. A pressure plate 533 penetrates the locking pins 532. The locking pins 532 are also provided with threads and are threaded to a nut.

[0086] When the worktable 10 is installed on the three-axis positioner 5, the locking pin 532 is located below the receiving boss 531. After the bottom surface of the locking plate 11 abuts against the receiving boss 531, the locking pin 52 can be swung to enter the locking port 111. Then, the nut is rotated to move the nut down and press the pressure plate 533 down. Finally, the pressure plate 533 presses against the top surface of the locking plate 11, realizing the fixing operation between the mounting base 53 and the locking plate 11.

[0087] In this embodiment, the first clamping mechanism 21, the second clamping mechanism 22, the third clamping mechanism 23, the fourth clamping mechanism 24, the fifth clamping mechanism 25 and the sixth clamping mechanism 26 are all detachably connected to the worktable 10. When using fixture 1 to fix other models of automotive rear subframes, since different models of automotive rear subframes have structural differences, as long as the different models of automotive rear subframes can be divided into front crossbeams, right longitudinal beams, rear crossbeams, left longitudinal beams, and center crossbeams, and both ends of the front and rear crossbeams are provided with a rear subframe mounting bushing, it is only necessary to find the corresponding clamping points on the automotive rear subframe of that model, and then set up corresponding clamping mechanisms on the worktable for each clamping point to form a new fixture. Then, this new fixture is installed on the three-axis positioner 5 of the automotive rear subframe welding workstation 3, and a new control program is entered into the main control panel 7, thereby controlling the new fixture to fix the corresponding automotive rear subframe; then, a new welding program is entered into the welding control box 8, thereby controlling the welding robot 6 to weld the corresponding automotive rear subframe. In this way, the automotive rear subframe welding workstation 3 can be applied to the welding of various types of automotive rear subframes, improving the flexibility of the automotive rear subframe welding workstation 3.

[0088] The usage process of the automotive rear subframe welding workstation 3 of the present invention:

[0089] See attached document Figure 5 First, the workpiece is loaded from the pre-installed side. Then, on the main control panel 7, the expansion pin 212 of the first clamping mechanism 21 is inserted into the corresponding rear subframe mounting bushing 32. The third clamping mechanism 23, the fourth clamping mechanism 24, and the fifth clamping mechanism 25 control the corresponding positioning pins to abut against the corresponding workpieces. Then, the sensor 247 of the fourth clamping mechanism 24 detects the current workpiece loading and transmits the detection signal to the main control panel 7. If the detection is successful (if the detection fails, a warning is issued on the main control panel 7 to remind the operator to pay attention and reposition the workpiece), the clamping mechanisms control the pressure arms to move the corresponding... The workpiece is clamped, and then the main control panel 7 controls the three-axis positioner 5 to rotate, causing the worktable 10 on the preparation side to rotate to the welding side. The main control panel 7 then controls the welding robot 6 to weld the workpiece. During the welding process, another workpiece is loaded onto the other worktable 10 located on the preparation side, and the corresponding clamping mechanism clamps the corresponding workpiece. After welding is completed, the main control panel 7 controls the three-axis positioner 5 to rotate, causing the worktable 10 located on the welding side to rotate to the preparation side. Finally, the workpiece is manually unloaded, and then reloaded. During the reloading process, the welding robot 6 welds the workpiece on the other worktable 10. This allows the workpiece loading cycle and the welding cycle to be independent and do not affect each other, improving the welding efficiency of the automotive rear subframe welding workstation 3.

[0090] Obviously, the embodiments described above are merely some embodiments of the present invention, not all embodiments. The accompanying drawings show preferred embodiments of the present invention, but do not limit the patent scope of the present invention. The present invention can be implemented in many different forms; rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this invention.

Claims

1. A clamp tool characterized by, Includes a worktable (10) and multiple clamping mechanisms (20) mounted on the worktable (10); The clamping mechanism (20) includes a first clamping mechanism (21), a second clamping mechanism (22), a third clamping mechanism (23), a fourth clamping mechanism (24), a fifth clamping mechanism (25), and a sixth clamping mechanism (26). The first clamping mechanism (21) and the second clamping mechanism (22) are both used to clamp the front crossbeam (2-26); the first clamping mechanism (21) can also be used to clamp the rear crossbeam (28); the third clamping mechanism (23) and the fourth clamping mechanism (24) are both used to clamp the left longitudinal beam (29) and the right longitudinal beam (27); the fifth clamping mechanism (25) is used to clamp the middle crossbeam (30); and the sixth clamping mechanism (26) is used to clamp the rear suspension mounting bracket (31). The left longitudinal beam (29) and the right longitudinal beam (27) are provided with a third through hole (33) at one end near the rear cross beam (28), and the middle cross beam (30) is provided with a fifth through hole (34) at both ends. There are four first clamping mechanisms (21), each of which includes a first telescopic drive device (211), an expansion pin (212), a first clamping drive device (213), and a first pressure arm (214); wherein the bottom wall of the first telescopic drive device (211) and the bottom wall of the first clamping drive device (213) are connected to the top wall of the worktable (10); The output end of each of the first telescopic drive devices (211) is connected to the bottom of the corresponding expansion pin (212), and the first telescopic drive device (211) can control the expansion pin (212) to move vertically. The output end of each of the first clamping drive devices (213) is connected to one end of the corresponding first pressure arm (214), and the other end of the first pressure arm (214) is provided with a first pressure block (215); each of the first clamping drive devices (213) can control the first pressure block (215) to move toward the corresponding expansion pin (212); There is one second clamping mechanism (22), which includes a second clamping drive device (221), a second pressure arm (222), and a support (223); the bottom wall of the second clamping drive device (221) and the bottom wall of the support (223) are both connected to the top wall of the worktable (10); The output end of the second clamping drive device (221) is connected to one end of the second pressure arm (222), and the other end of the second pressure arm (222) is provided with a second pressure block (224); the second clamping drive device (221) can control the second pressure block (224) to move toward the support seat (223) so that it cooperates with the support seat (223) to clamp the middle part of the front crossbeam (2-26); There are two third clamping mechanisms (23), each of which includes a third clamping drive device (231), a third pressure arm (232), a third telescopic drive device (233), a third positioning pin (234), and a third limiting seat (235); the bottom wall of the third clamping drive device (231) and the bottom wall of the third telescopic drive device (233) are both connected to the top wall of the worktable (10); The output end of the third telescopic drive device (233) is connected to the bottom wall of the third positioning pin (234), and the output end of the third telescopic drive device (233) is also connected to the bottom of the third limiting seat (235). The third telescopic drive device (233) can control the third positioning pin (234) and the third limiting seat (235) to move vertically, so that the third positioning pin (234) extends into the third through hole (33). The output end of the third clamping drive device (231) is connected to one end of the third pressure arm (232), and the other end of the third pressure arm (232) is provided with a third pressure block (236); each of the third clamping drive devices (231) can control the third pressure block (236) to move toward the corresponding third positioning pin (234), so that the third pressure block (236) cooperates with the corresponding third limiting seat (235) to clamp the left longitudinal beam (29) and the right longitudinal beam (27). There are two fourth clamping mechanisms (24), each of which includes a fourth clamping drive device (241), a fourth pressure arm (242), a fourth fixed seat (243), a fourth positioning pin (244), a fourth limiting seat (245), and a sensor (247); the bottom wall of the fourth clamping drive device (241) and the bottom wall of the fourth fixed seat (243) are both connected to the top wall of the worktable (10); The output end of the fourth fixing seat (243) is connected to the bottom wall of the fourth positioning pin (244); the fourth fixing seat (245) is also connected to one side of the fourth fixing seat (243); a sensor (247) is provided on the side of the fourth positioning pin (244) away from the fourth positioning pin (245); the fourth positioning pin (244) can abut against the bottom wall of the corresponding longitudinal beam. The output end of the fourth clamping drive device (241) is connected to one end of the fourth pressure arm (242), and the other end of the fourth pressure arm (242) is provided with a fourth pressure block (246); each of the fourth clamping drive devices (241) can control the fourth pressure block (246) to move toward the corresponding fourth positioning pin (244), so that the fourth pressure block (246) cooperates with the corresponding fourth limiting seat (245) to clamp the left longitudinal beam (29) and the right longitudinal beam (27). There are two fifth clamping mechanisms (25), each of which includes a fifth fixed seat (251), a fifth pressure arm A (252), a fifth positioning pin A (253), a fifth telescopic drive device (254), a fifth pressure arm B (255), and a fifth positioning pin B (256); the bottom wall of the fifth telescopic drive device (254) and the bottom wall of the fifth fixed seat (251) are both connected to the top wall of the worktable (10); The top wall of the fifth fixed seat (251) is connected to one end of the fifth pressure arm A (252), and the other end of the fifth pressure arm A (252) is provided with a fifth positioning pin A (253). The fifth positioning pin A (253) can extend into the interior of the corresponding fifth through hole (34) from one side. The output end of the fifth telescopic drive device (254) is connected to one end of the fifth pressure arm B (255), and the other end of the fifth pressure arm B (255) is provided with a fifth positioning pin B (256); each of the fifth telescopic drive devices (254) can control the fifth positioning pin B (256) to move toward the corresponding fifth pressure arm A (252), and extend into the interior of the fifth through hole (34) from the other side, so that the fifth pressure arm B (255) cooperates with the corresponding fifth pressure arm A (252) to clamp the middle crossbeam (30). There is one sixth clamping mechanism (26), which includes a sixth clamping drive device (261), a sixth pressure arm (262) and a sixth limiting seat (263); the bottom wall of the sixth clamping drive device (261) and the bottom wall of the sixth limiting seat (263) are both connected to the top wall of the worktable (10); The output end of the sixth clamping drive device (261) is connected to one end of the sixth pressure arm (262), and the other end of the sixth pressure arm (262) is provided with a sixth pressure block (264); the sixth clamping drive device (261) can control the sixth pressure block (264) to move toward the sixth limit seat (263).

2. The fixture according to claim 1, characterized in that, The first clamping mechanism (21), the second clamping mechanism (22), the third clamping mechanism (23), the fourth clamping mechanism (24), the fifth clamping mechanism (25) and the sixth clamping mechanism (26) are all detachably connected to the worktable (10).

3. A welding workstation for a rear subframe of an automobile, comprising the fixture as described in any one of claims 1-2, and further comprising a workstation body (4), a three-axis positioner (5), and a welding robot (6). The three-axis positioner (5) is installed on the bottom wall of the workstation body (4), and two welding robots (6) are arranged side by side on one side of the three-axis positioner (5). The three-axis positioner (5) includes a horizontal central axis (51) and two working axes (52) parallel to the central axis (51). The side of the three-axis positioner (5) facing the welding robot (6) is the welding side, and the other side of the three-axis positioner (5) away from the welding robot (6) is the preparation side. The two working axes (52) are symmetrically arranged on both sides of the central axis (51) and rotate around the axis of the central axis (51), so that the working axes (52) can rotate from the preparation side to the welding side, or from the welding side to the preparation side. Both the preparation side and the welding side are rotatably mounted with a fixture, which rotates around the corresponding working shaft (52). Each of the welding robots (6) is equipped with a welding torch for welding workpieces held by the welding side worktable (10).

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