Clamp tool and automobile front subframe welding workstation

Abstract

The present application relates to a kind of fixture tooling and automobile front subframe welding workstation.The fixture tooling includes workbench and multiple clamping mechanisms mounted on workbench;The clamping mechanism includes first clamping mechanism, second clamping mechanism, third clamping mechanism, fourth clamping mechanism and fifth clamping mechanism;Wherein the first clamping mechanism and the second clamping mechanism are used for clamping left side rail and right side rail;The third clamping mechanism is used for clamping front cross beam;The fourth clamping mechanism is used for clamping stabilizer bar mounting bracket;The fifth clamping mechanism is used for clamping rear cross beam.By setting twelve clamping points on the workpiece to be welded, then each clamping point is applied to be clamped with 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 in 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 front subframes. Background Technology

[0002] The existing automotive front subframe consists of a rear crossbeam, a left longitudinal beam, a right longitudinal beam, and a front crossbeam. Both ends of the left and right longitudinal beams are equipped with steering gear sleeves, and both ends of the rear crossbeam on the side away from the front crossbeam are equipped with stabilizer bar mounting brackets.

[0003] The rear crossbeam, left longitudinal beam, right longitudinal beam, and front 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 an automotive front subframe, 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, and a fifth clamping mechanism;

[0008] The first and second clamping mechanisms are used to clamp the left and right longitudinal beams, respectively; the third clamping mechanism is used to clamp the front crossbeam; the fourth clamping mechanism is used to clamp the stabilizer bar mounting bracket; and the fifth clamping mechanism is used to clamp the rear crossbeam.

[0009] Furthermore, the first clamping mechanism 21, the second clamping mechanism 22, the third clamping mechanism 23, the fourth clamping mechanism 24 and the fifth clamping mechanism 25 are all detachably connected to the worktable 10.

[0010] Furthermore, there are four first clamping mechanisms, each of which includes a first telescopic drive device, a first positioning 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 wall of the corresponding first positioning pin, and the first telescopic drive device can control the first positioning 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; the first clamping drive device can control the first pressure block to move toward the corresponding first positioning pin.

[0013] Furthermore, there are two second clamping mechanisms, each of which includes a second clamping drive device, a second pressure arm, a second base, a second support block, and a sensor; the bottom wall of the second clamping drive device and the bottom wall of the second base are both connected to the top wall of the worktable;

[0014] Each of the second bases has a second support block on its top wall, and each of the second support blocks has a corresponding sensor on one side.

[0015] The output end of each of the second clamping drive devices is connected to one end of the second pressure arm, and the other end of each of the second pressure arms is provided with a second pressure block; each of the second clamping drive devices can control the second pressure block to move toward the corresponding second support block.

[0016] 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, and a third positioning pin; 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.

[0017] The output end of the third telescopic drive device is connected to the bottom wall of the third positioning pin, and the third telescopic drive device can control the third positioning pin to move vertically.

[0018] 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.

[0019] Furthermore, there are two fourth clamping mechanisms, each of which includes a fourth clamping drive device, a fourth pressure arm, a fourth base, and a fourth support block; the bottom wall of the fourth clamping drive device and the bottom wall of the fourth base are both connected to the top wall of the worktable;

[0020] The top wall of the fourth base is connected to the bottom wall of the fourth support block;

[0021] 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 support block.

[0022] Furthermore, there are two fifth clamping mechanisms, each of which includes a fifth clamping drive device, a fifth pressure arm, a fifth telescopic drive device, and a fifth positioning pin; the bottom wall of the fifth clamping drive device and the bottom wall of the fifth telescopic drive device are both connected to the top wall of the worktable;

[0023] The output end of the fifth telescopic drive device is connected to the bottom wall of the fifth positioning pin, and the fifth telescopic drive device can control the fifth positioning pin to move vertically.

[0024] The output end of the fifth clamping drive device is connected to one end of the fifth pressure arm, and the other end of the fifth pressure arm is provided with a fifth pressure block; the fifth clamping drive device can control the fifth pressure block to move toward the corresponding fifth positioning pin.

[0025] A welding workstation for a front 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.

[0026] 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;

[0027] 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.

[0028] Both the preparation side and the welding side are rotatably mounted with a fixture, which rotates around the corresponding working shaft.

[0029] The welding robot is equipped with a welding torch, which is used to weld the workpiece held in the worktable on the welding side.

[0030] Implementing the embodiments of the present invention will have the following beneficial effects:

[0031] 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

[0032] 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.

[0033] in:

[0034] Figure 1 This is a structural schematic diagram of the working state of the fixture in this application;

[0035] Figure 2 This is a schematic diagram of the fixture in the released state of this application.

[0036] Figure 3 This is a structural schematic diagram of the front subframe of the automobile in this application;

[0037] Figure 4 This is a schematic diagram showing the distribution of clamping points on the front subframe of the automobile in this application;

[0038] Figure 5 This is a top view of the automotive front subframe welding workstation described in this application;

[0039] Figure 6 This is a schematic diagram of the structure of the first clamping mechanism in this application;

[0040] Figure 7 This is a schematic diagram of the structure of the second clamping mechanism in this application;

[0041] Figure 8 This is a schematic diagram of the third clamping mechanism in this application;

[0042] Figure 9 This is a schematic diagram of the fourth clamping mechanism in this application;

[0043] Figure 10 This is a schematic diagram of the fifth clamping mechanism in this application;

[0044] Figure 11 This is a schematic diagram of the structure of the three-axis positioner in this application;

[0045] Figure 12 This is a schematic diagram of the connection structure between the locking plate and the mounting base in this application.

[0046] Figure label:

[0047] 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; A. Clamping point;

[0048] 2. Front subframe of automobile; 26. Left longitudinal beam; 27. Right longitudinal beam; 28. Front crossbeam; 29. ​​Rear crossbeam; 30. Stabilizer bar mounting bracket; 31. Steering gear sleeve;

[0049] 3. Automotive front 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;

[0050] 211. First telescopic drive device; 212. First positioning pin; 213. First clamping drive device; 214. First pressure arm; 215. First pressure block; 216. First support block;

[0051] 221. Second clamping drive device; 222. Second pressure arm; 223. Second base; 224. Second support block; 225. Sensor; 226. Second pressure block;

[0052] 231. Third clamping drive device; 232. Third pressure arm; 233. Third telescopic drive device; 234. Third positioning pin; 235. Third pressure block;

[0053] 241. Fourth clamping drive device; 242. Fourth pressure arm; 243. Fourth base; 244. Fourth support block; 245. Fourth pressure block;

[0054] 251. Fifth clamping drive device; 252. Fifth pressure arm; 253. Fifth telescopic drive device; 254. Fifth positioning pin; 255. Fifth pressure block. Detailed Implementation

[0055] 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.

[0056] 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.

[0057] 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.

[0058] See attached document Figure 1-12 As one embodiment, a fixture 1 includes a worktable 10 and a plurality of clamping mechanisms 20 mounted on the worktable 10.

[0059] 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, and a fifth clamping mechanism 25.

[0060] The first clamping mechanism 21 and the second clamping mechanism 22 are both used to clamp the left longitudinal beam 26 and the right longitudinal beam 27; the third clamping mechanism 23 is used to clamp the front crossbeam 28; the fourth clamping mechanism 24 is used to clamp the stabilizer rod mounting bracket 30; and the fifth clamping mechanism 25 is used to clamp the rear crossbeam 29.

[0061] In this embodiment, the front subframe 2 of the automobile and the top wall or above of the constituent workpiece refer to the side of the front subframe 2 of the automobile facing away from the worktable 10; the bottom wall or below of the front subframe 2 of the automobile and the constituent workpiece refer to the side of the front subframe 2 of the automobile facing the worktable 10.

[0062] See attached document Figure 3The left longitudinal beam 26, the rear cross beam 29, the right longitudinal beam 27, and the front cross beam 28 are sequentially welded to form the front subframe 2 of the vehicle. A steering gear sleeve 31 is provided at both ends of the left longitudinal beam 26 and the right longitudinal beam 27, and the steering gear sleeve 31 passes through the corresponding left longitudinal beam 26 and right longitudinal beam 27. The stabilizer bar mounting brackets 30 are respectively located at both ends of the rear cross beam 29 on the side away from the front cross beam 28. The steering gear sleeve 31 is a hollow cylinder.

[0063] See attached document Figure 4 Each of the four steering gear sleeves 31 has a clamping point A; the middle of the left longitudinal beam 26 and the middle of the right longitudinal beam 27 each have a clamping point A; each of the two ends near the front crossbeam 28 has a clamping point A; each of the two ends of the rear crossbeam 29 away from the front crossbeam 28 has a clamping point A; and each stabilizer bar mounting bracket 30 has a clamping point A in the middle. There are a total of twelve clamping points A, each corresponding to a clamping mechanism. When the workpiece constituting the front subframe 2 of the automobile 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.

[0064] As one embodiment, refer to the appendix Figure 1 and attached Figure 6 There are four first clamping mechanisms 21. Each first clamping mechanism 21 includes a first telescopic drive device 211, a first positioning 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.

[0065] The output end of each of the first telescopic drive devices 211 is connected to the bottom wall of the corresponding first positioning pin 212. The first telescopic drive device 211 can control the first positioning pin 212 to move vertically, that is, the first telescopic drive device 211 can control the first positioning pin 212 to extend from below the front subframe 2 of the vehicle into the corresponding steering gear sleeve 31.

[0066] Each of the first clamping drive devices 213 has its output end 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. The first clamping drive device 213 can control the first pressure block 215 to move toward the corresponding first positioning pin 212. The first positioning pin 212 is cylindrical in shape, and the bottom wall of the first pressure block 215 is circular. A first support block 216 is also provided between the first positioning pin 212 and the output end of the first clamping drive device 213. When the first positioning pin 212 extends into the corresponding steering gear sleeve 31, the top wall of the first support block 216 corresponds to the steering gear sleeve 31 and is connected to the bottom walls at both ends of the left longitudinal beam 26 and the bottom walls at both ends of the right longitudinal beam 27. Then, the first clamping drive device 213 controls the first pressure block 215 to cooperate with the first support block 216 to clamp the left longitudinal beam 26 and the right longitudinal beam 27 with the steering gear sleeve 31.

[0067] See attached document Figure 1 and attached Figure 7 There are two second clamping mechanisms 22. Each second clamping mechanism 22 includes a second clamping drive device 221, a second pressure arm 222, a second base 223, a second support block 224, and a sensor 225. The bottom wall of the second clamping drive device 221 and the bottom wall of the second base 223 are both connected to the top wall of the worktable 10.

[0068] Each of the second bases 223 has a second support block 224 on its top wall, and each of the second support blocks 224 has a sensor 225 on one side. The sensor 225 is a photoelectric sensor. The top wall of each second support block 224 can be connected to the bottom wall of the middle part of the corresponding left longitudinal beam 26 and the bottom wall of the middle part of the right longitudinal beam 27.

[0069] The output end of each of the second clamping drive devices 221 is connected to one end of the second pressure arm 222, and the other end of each of the second pressure arms 222 is provided with a second pressure block 224; each of the second clamping drive devices 221 can control the second pressure block 224 to move toward the corresponding second support block 224, that is, the second clamping drive device 221 can control the second pressure block 224 to cooperate with the corresponding second support block 224 to clamp the middle part of the left longitudinal beam 26 and the middle part of the right longitudinal beam 27.

[0070] See attached document Figure 1 and attached Figure 8 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, and a third positioning pin 234. 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.

[0071] The output end of the third telescopic drive device 233 is connected to the bottom wall of the third positioning pin 234, and the third telescopic drive device 233 can control the third positioning pin 234 to move vertically; wherein the top wall of the third positioning pin 234 can abut against the bottom wall of the front crossbeam 28.

[0072] 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 235; each of the third clamping drive devices 231 can control the third pressure block 235 to move toward the corresponding third positioning pin 234, that is, the third clamping drive device 231 can control the third pressure block 235 to cooperate with the corresponding third positioning pin 234 to clamp the front crossbeam 28.

[0073] See attached document Figure 1 and attached Figure 9 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 base 243, and a fourth support block 244. The bottom wall of the fourth clamping drive device 241 and the bottom wall of the fourth base 243 are both connected to the top wall of the worktable 10.

[0074] The top wall of the fourth base 243 is connected to the bottom wall of the fourth support block 244; wherein the top wall of the fourth support block 244 can abut against the bottom wall of the stabilizer mounting bracket 30.

[0075] 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 245; each of the fourth clamping drive devices 241 can control the fourth pressure arm 242 to move toward the corresponding fourth support block 244, that is, the fourth clamping drive device 241 can control the fourth pressure block 245 to cooperate with the corresponding fourth support block 244 to clamp the stabilizer rod mounting bracket 30.

[0076] See attached document Figure 1 and attached Figure 10 There are two fifth clamping mechanisms 25. Each fifth clamping mechanism 25 includes a fifth clamping drive device 251, a fifth pressure arm 252, a fifth telescopic drive device 253, and a fifth positioning pin 254. The bottom wall of the fifth clamping drive device 251 and the bottom wall of the fifth telescopic drive device 253 are both connected to the top wall of the worktable 10.

[0077] The output end of the fifth telescopic drive device 253 is connected to the bottom wall of the fifth positioning pin 254. The fifth telescopic drive device 253 can control the fifth positioning pin 254 to move vertically. The top wall of the fifth positioning pin 254 can abut against the bottom wall of the stabilizer mounting bracket 30.

[0078] The output end of the fifth clamping drive device 251 is connected to one end of the fifth pressure arm 252, and the other end of the fifth pressure arm 252 is provided with a fifth pressure block 255. The fifth clamping drive device 251 can control the fifth pressure block 255 to move toward the corresponding fifth positioning pin 254, that is, the fifth clamping drive device 251 can control the fifth pressure block 255 to cooperate with the corresponding fifth positioning pin 254 to clamp the rear crossbeam 29.

[0079] In this embodiment, the first telescopic drive device 211, the third telescopic drive device 233 and the fifth telescopic drive device 253 are all telescopic cylinders. The telescopic cylinder can control its output end to make vertical movements, and the vertical direction is perpendicular to the ground.

[0080] 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 fifth clamping drive device 251 are all clamping cylinders. These clamping cylinders can control their output end to open and close toward the front subframe 2 of the vehicle, thereby causing the pressure arm connected to the output end to open and close toward the front subframe 2 of the vehicle, and consequently causing the pressure block connected to the corresponding pressure arm to open and close toward the front subframe 2 of the vehicle, enabling the pressure block to clamp or release the front subframe 2 of the vehicle.

[0081] See attached document Figure 4 Because the shapes of the workpieces that make up the front subframe are irregular, some clamping points A are located on the inclined surface of the workpiece, and some clamping points A are located on the horizontal surface of the workpiece. Therefore, the side of the first pressure block 215, the fourth pressure block 245 and the fifth pressure block 255 that abuts against the clamping point A of the workpiece are all horizontal surfaces; the side of the second pressure block 224 and the third pressure block 235 that abuts against the clamping point A of the workpiece are all inclined surfaces.

[0082] As one embodiment, refer to the appendix Figure 1 and attached Figure 5 The present invention also provides a welding workstation 3 for a front subframe of an automobile using the above-mentioned fixture 1, and further includes a workstation body 4, a three-axis positioner 5 and a welding robot 6.

[0083] 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 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 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. A fixture 1 is rotatably installed on both the preparation side and the welding side. The fixture 1 is rotated around the corresponding working axis 52.

[0084] The welding robot 6 is equipped with a welding torch, which is used to weld the workpiece held in the welding side workbench 10.

[0085] In this embodiment, the automotive front subframe welding workstation 3 is rectangular in shape. The automotive front 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 an outer side wall of the workstation body 4, which is away from the welding robot 6. The welding control box 8 is located on another outer side wall of the workstation body 4, which is away from the main control panel 7.

[0086] 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.

[0087] When loading the workpiece on the preparation side (industry terminology), it refers to correctly placing the workpiece that makes up the front subframe 2 of the automobile onto the worktable 10. The first locating pin 212, the third locating pin 234, and the fifth locating pin 254 are all engaged or abutted against the corresponding workpiece. 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 of the workpiece for the welding robot 6 to weld, enabling the welding robot 6 to weld the workpiece more smoothly and improving its welding efficiency. Meanwhile, the other worktable 10, originally located on the welding side, is moved to the preparation side, where the worker loads the workpiece. This separates the loading cycle and the welding cycle of the front subframe welding workstation 3, preventing interference and improving the production efficiency of the front subframe welding workstation 3.

[0088] 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 front subframe welding workstation 3, reducing the time required to complete the welding of one automotive front subframe 2.

[0089] In this embodiment, refer to the appendix. Figure 11-12 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.

[0090] 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.

[0091] 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.

[0092] In this embodiment, the first clamping mechanism 21, the second clamping mechanism 22, the third clamping mechanism 23, the fourth clamping mechanism 24, and the fifth clamping mechanism 25 are all detachably connected to the worktable 10. When it is necessary to use the fixture 1 to fix other models of car front subframes (the front subframe of this model of car is also composed of a rear crossbeam, a left longitudinal beam, a right longitudinal beam, and a front crossbeam, and a steering gear steel sleeve is also provided through both ends of the left and right longitudinal beams), it is only necessary to find the corresponding clamping point A on the front subframe of this model of car, and each clamping point A is matched with a clamping mechanism.

[0093] Because different car models have structural differences in their front subframes, as long as the front subframe of different models can be divided into a rear crossbeam, left longitudinal beam, right longitudinal beam, and front crossbeam, and both ends of the left and right longitudinal beams are respectively connected by a steering gear steel sleeve, it is only necessary to find the clamping points on the corresponding front subframe, and then set up corresponding clamping mechanisms on another workbench for each clamping point to form a new fixture. This new fixture is then installed on the three-axis positioner 5 of the automotive front subframe welding workstation 3. A new control program is entered into the main control panel 7, thereby controlling the new fixture to fix the corresponding automotive front subframe. A new welding program is then entered into the welding control box 8, thereby controlling the welding robot 6 to weld the corresponding automotive front subframe assembly. This allows the automotive front subframe welding workstation 3 to be applicable to the welding of various types of automotive front subframes, improving the flexibility of the automotive front subframe welding workstation 3.

[0094] The usage process of the automotive front subframe welding workstation 3 of the present invention:

[0095] See attached document Figure 5First, the workpiece is loaded from the preparatory side. Then, on the main control panel 7, the first positioning pin 212 of the first clamping mechanism 21 is inserted into the corresponding steering gear steel sleeve 31. Next, the sensor 225 of the second clamping mechanism 22 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 clamp the corresponding workpiece. Then, the third clamping mechanism 23 and the fifth clamping mechanism 25 control the corresponding positioning pin to abut against the corresponding workpiece. Then, the main control panel 7 controls the three-axis positioner 5 to rotate, so that the worktable 10 on the preparation side is rotated 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 placed on the other worktable 10 on the preparation side, and the corresponding clamping mechanism clamps the corresponding workpiece. After the welding is completed, the main control panel 7 controls the three-axis positioner 5 to rotate, so that the worktable 10 on the welding side is rotated to the preparation side. Finally, it is manually unloaded. After unloading, it is reloaded. During the reloading process, the welding robot 6 welds the workpiece on the other worktable 10.

[0096] 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 fixture, characterized in that, 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), and a fifth clamping mechanism (25). The first clamping mechanism (21) and the second clamping mechanism (22) are both used to clamp the left longitudinal beam (26) and the right longitudinal beam (27); the third clamping mechanism (23) is used to clamp the front crossbeam (28); the fourth clamping mechanism (24) is used to clamp the stabilizer bar mounting bracket (30); and the fifth clamping mechanism (25) is used to clamp the rear crossbeam (29). Both ends of the left longitudinal beam (26) and the right longitudinal beam (27) are provided with a steering gear sleeve (31), which passes through the corresponding left longitudinal beam (26) and right longitudinal beam (27). There are four first clamping mechanisms (21), each of which includes a first telescopic drive device (211), a first positioning 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 wall of the corresponding first positioning pin (212). The first telescopic drive device (211) can control the first positioning pin (212) to make vertical telescopic movement so that it can be inserted into the corresponding steering gear sleeve (31). 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); the first clamping drive device (213) can control the first pressure block (215) to move toward the corresponding first positioning pin (212); the first positioning pin (212) is cylindrical in shape, and the bottom wall of the first pressure block (215) is circular; and the first positioning pin (212) and the first clamping drive device (213) A first support block (216) is also provided between the output ends. When the first positioning pin (212) is inserted into the corresponding steering gear sleeve (31), the top wall of the first support block (216) corresponds to the steering gear sleeve (31) and is connected to the bottom walls at both ends of the left longitudinal beam (26) and the bottom walls at both ends of the right longitudinal beam (27). Then the first clamping drive device (213) controls the first pressure block (215) to cooperate with the first support block (216) to clamp the left longitudinal beam (26) and the right longitudinal beam (27) with the steering gear sleeve (31). There are two second clamping mechanisms (22), each of which includes a second clamping drive device (221), a second pressure arm (222), a second base (223), a second support block (224), and a sensor (225); the bottom wall of the second clamping drive device (221) and the bottom wall of the second base (223) are both connected to the top wall of the worktable (10); Each of the second bases (223) has a second support block (224) on its top wall, and each of the second support blocks (224) has a sensor (225) on one side. The top wall of each second support block (224) can be connected to the bottom wall of the middle part of the corresponding left longitudinal beam (26) and the bottom wall of the middle part of the right longitudinal beam (27). The output end of each of the second clamping drive devices (221) is connected to one end of the second pressure arm (222), and the other end of each of the second pressure arms (222) is provided with a second pressure block (226); each of the second clamping drive devices (221) can control the second pressure block (226) to move toward the corresponding second support block (224), so that it cooperates with the corresponding second support block (224) to clamp the middle part of the left longitudinal beam (26) and the middle part of the right longitudinal beam (27); 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), and a third positioning pin (234); 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 third telescopic drive device (233) can control the third positioning pin (234) to make vertical telescopic movement; 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 (235); each of the third clamping drive devices (231) can control the third pressure block (235) to move toward the corresponding third positioning pin (234); There are two fourth clamping mechanisms (24), each of which includes a fourth clamping drive device (241), a fourth pressure arm (242), a fourth base (243), and a fourth support block (244); the bottom wall of the fourth clamping drive device (241) and the bottom wall of the fourth base (243) are both connected to the top wall of the worktable (10); The top wall of the fourth base (243) is connected to the bottom wall of the fourth support block (244); 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 (245); each of the fourth clamping drive devices (241) can control the fourth pressure block (245) to move toward the corresponding fourth support block (244); There are two fifth clamping mechanisms (25), each of which includes a fifth clamping drive device (251), a fifth pressure arm (252), a fifth telescopic drive device (253), and a fifth positioning pin (254); the bottom wall of the fifth clamping drive device (251) and the bottom wall of the fifth telescopic drive device (253) are both connected to the top wall of the worktable (10); The output end of the fifth telescopic drive device (253) is connected to the bottom wall of the fifth positioning pin (254), and the fifth telescopic drive device (253) can control the fifth positioning pin (254) to move vertically. The output end of the fifth clamping drive device (251) is connected to one end of the fifth pressure arm (252), and the other end of the fifth pressure arm (252) is provided with a fifth pressure block (255); the fifth clamping drive device (251) can control the fifth pressure block (255) to move toward the corresponding fifth positioning pin (254).

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) and the fifth clamping mechanism (25) are all detachably connected to the worktable (10).

3. A welding workstation for a front subframe of an automobile, characterized in that, The fixture as described in claim 1 or 2 also includes 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). The welding robot (6) is equipped with a welding torch, which is used to weld the workpiece held by the welding side worktable (10).

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