Welding device for vehicle engine bay panel assembly production

Abstract

The utility model discloses a kind of welding devices for vehicle cabin apron assembly production, including first clamping device for clamping first apron in the first end of first apron, second clamping device and third clamping device for simultaneously clamping the second end of second apron and first apron, fourth clamping device for clamping and positioning second small support, first positioning device for positioning first apron, second positioning device for positioning second apron and third positioning device for positioning first small support, third positioning device includes positioning block and positioning pin, positioning groove for embedding first small support is provided on positioning block, positioning pin is inserted into positioning groove.The utility model discloses a kind of welding devices for vehicle cabin apron assembly production, by setting clamping device and positioning device at multiple preset positions cooperate to clamp each component of vehicle cabin apron assembly, avoid component misplacement, ensure that each component positioning is accurate, improve clamping efficiency, improve the product quality of vehicle cabin apron assembly after welding.

Description

Technical Field

[0001] This utility model belongs to the technical field of automotive parts production equipment. Specifically, this utility model relates to a welding device for the production of vehicle engine compartment protective panel components. Background Technology

[0002] The vehicle engine compartment skid plate assembly is welded together from a first vertical plate, a second vertical plate, a first small bracket, and a second small bracket. During welding, welding fixtures are required to clamp each component to ensure accurate positioning and fixation before welding can proceed.

[0003] In the existing technology, there is a lack of welding fixtures or devices that can accurately position and fix the various components of the vehicle engine compartment shroud assembly.

[0004] Chinese Patent Application No. 202411751468.4 discloses an engine compartment shroud assembly and positioning device, including an installation frame; the installation frame is respectively provided with a vertical plate gripper support and fixing structure, a vertical plate gripper positioning structure, and a vertical plate gripper sensing structure; the vertical plate gripper support and fixing structure, the vertical plate gripper positioning structure, and the vertical plate gripper sensing structure are all connected to the vertical plate gripper. The technical solution disclosed in this patent document also fails to solve the aforementioned technical problem.

[0005] A welding apparatus for producing vehicle engine compartment panel assemblies is provided, particularly concerning how to accurately position and fix the various components of the vehicle engine compartment panel assembly during welding, thereby improving the product quality of the welded vehicle engine compartment panel assembly. Utility Model Content

[0006] This utility model provides a welding device for the production of vehicle engine compartment panel assemblies, the purpose of which is to achieve accurate positioning and fixation of each component of the vehicle engine compartment panel assembly during welding, thereby improving the product quality of the welded vehicle engine compartment panel assembly.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a welding device for producing vehicle engine compartment shroud components, comprising a first clamping device for clamping the first end of the first shroud, a second clamping device and a third clamping device for simultaneously clamping the second end of the second shroud and the first shroud, a fourth clamping device for clamping and positioning the second small bracket, a first positioning device for positioning the first shroud, a second positioning device for positioning the second shroud, and a third positioning device for positioning the first small bracket. The third positioning device includes a positioning block and a positioning pin. The positioning block is provided with a positioning groove for embedding the first small bracket, and the positioning pin is inserted into the positioning groove.

[0008] The first clamping device includes a first clamping bracket, a first clamping arm rotatably disposed on the first clamping bracket, a first upper clamping block disposed on the first clamping arm, and a first lower clamping block disposed on the first clamping bracket and cooperating with the first upper clamping block.

[0009] The first positioning device includes a first left bracket, a first right bracket, a first left positioning pin disposed on the first left bracket, and a first right positioning pin disposed on the first right bracket.

[0010] The second clamping device includes a second clamping bracket, a first auxiliary bracket, a second clamping arm rotatably mounted on the second clamping bracket, a second upper clamping block mounted on the second clamping arm, a second lower clamping block mounted on the second clamping bracket and cooperating with the second upper clamping block, and a first auxiliary lower clamping block mounted on the first auxiliary bracket and cooperating with the second upper clamping block. Multiple second upper clamping blocks are provided.

[0011] The third clamping device includes a third clamping bracket, a second auxiliary bracket, a third auxiliary bracket, a third clamping arm rotatably mounted on the third clamping bracket, a third upper clamping block mounted on the third clamping arm, a third lower clamping block mounted on the third clamping bracket and cooperating with the third upper clamping block, a second auxiliary lower clamping block mounted on the second auxiliary bracket and cooperating with the third upper clamping block, and a third auxiliary lower clamping block mounted on the third auxiliary bracket and cooperating with the third upper clamping block. Multiple third upper clamping blocks are provided.

[0012] The second positioning device includes a second positioning cylinder mounted on the second auxiliary bracket. The second positioning cylinder is connected to a second positioning seat, and a second positioning pin is mounted on the second positioning seat. The second positioning cylinder is vertically positioned.

[0013] The third positioning device further includes a third positioning bracket and a third positioning cylinder disposed on the third positioning bracket. The third positioning cylinder is connected to a third positioning seat. The positioning block and the positioning pin are disposed on the third positioning seat. The third positioning cylinder is horizontally positioned.

[0014] The fourth clamping device includes a fourth clamping bracket, a fourth clamping arm rotatably mounted on the fourth clamping bracket, a first side clamping block mounted on the fourth clamping arm, a fifth clamping arm rotatably mounted on the fifth clamping arm, and a second side clamping block mounted on the fifth clamping arm. A fourth positioning cylinder is mounted on the fourth clamping bracket and connected to a fourth positioning seat. A fourth positioning pin is mounted on the fourth positioning seat. The fourth positioning seat and the second side clamping block are arranged opposite to each other, and the fourth positioning cylinder is horizontally mounted.

[0015] The welding device for producing vehicle engine compartment panel assemblies of this utility model uses clamping devices and positioning devices set at multiple preset positions to clamp the various components of the vehicle engine compartment panel assembly together, avoiding component misalignment, ensuring accurate positioning of each component, improving clamping efficiency, and improving the product quality of the welded vehicle engine compartment panel assembly. Attached Figure Description

[0016] This manual includes the following figures, which illustrate the following: Figure 1 This is a schematic diagram of the structure of the welding device for the vehicle engine compartment protective panel assembly of this utility model; Figure 2 This is a top view of the welding device for the vehicle engine compartment shroud assembly of this utility model; Figure 3 This is a structural schematic diagram of the vehicle engine compartment shroud assembly; Figure 4 This is a structural schematic diagram of the first clamping device and the first positioning device; Figure 5 This is a schematic diagram of the third positioning device; Figure 6 This is a schematic diagram of the second clamping device; Figure 7 This is a schematic diagram of the third clamping device and the second positioning device; Figure 8 This is a schematic diagram of the fourth clamping device; The markings in the diagram are as follows: 1. First protective plate; 2. Second protective plate; 3. Third positioning bracket; 4. First small bracket; 5. Second small bracket; 6. First clamping bracket; 7. First clamping arm; 8. First upper clamping block; 9. First lower clamping block; 10. First driver; 11. First left bracket; 12. First right bracket; 13. First left positioning pin; 14. First right positioning pin; 15. Base; 16. Second clamping bracket; 17. Second clamping arm; 18. Second upper clamping block; 19. Second driver; 20. First auxiliary bracket; 21. Third lower clamping block; 22. Second positioning cylinder; 23. Second positioning seat; 24. Second positioning pin; 25. First 26. Auxiliary lower clamping block; 27. Third clamping bracket; 28. Third clamping arm; 29. ​​Third upper clamping block; 30. Third actuator; 31. Second auxiliary bracket; 32. Third auxiliary bracket; 33. Second auxiliary lower clamping block; 34. Third positioning cylinder; 35. Third positioning seat; 36. Third positioning pin; 37. Positioning block; 38. Fourth clamping bracket; 39. Fourth clamping arm; 40. First side clamping block; 41. Second side clamping block; 42. Fourth positioning seat; 43. Fourth positioning pin; 44. Fourth actuator; 45. Fifth actuator; 46. Fifth clamping arm; 47. Fourth positioning cylinder; 48. Second lower clamping block. Detailed Implementation

[0017] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solution of this utility model, and to facilitate its implementation.

[0018] like Figures 1 to 7 As shown, this utility model provides a welding device for producing vehicle engine compartment panel components, including a base 15, a first clamping device for clamping the first end of the first panel 1, a second clamping device and a third clamping device for simultaneously clamping the second end of the second panel 2 and the first panel 1, a fourth clamping device for clamping and positioning the second small bracket 5, a first positioning device for positioning the first panel 1, a second positioning device for positioning the second panel 2, and a third positioning device for positioning the first small bracket 4. The third positioning device includes a positioning block 37 and a third positioning pin 36. The positioning block 37 is provided with a positioning groove for embedding the first small bracket 4, and the third positioning pin 36 is inserted into the positioning groove. The first clamping device, the second clamping device, the third clamping device, and the fourth clamping device are disposed on the base 15. The first clamping device and the second clamping device are on the same straight line parallel to the first direction. The second clamping device, the third clamping device, and the fourth clamping device are on the same straight line parallel to the second direction. The third clamping device is located between the second clamping device and the fourth clamping device. The first direction and the second direction are both horizontal and perpendicular to each other.

[0019] Specifically, such as Figure 3 As shown, the vehicle engine compartment skid plate assembly consists of a first skid plate 1, a second skid plate 2, a first small bracket 4, and a second small bracket 5. The second skid plate 2 needs to be welded to the first skid plate 1, the first small bracket 4 needs to be welded to the first skid plate 1, and the second small bracket 5 needs to be welded to the second skid plate 2. During welding, a welding device must be used to clamp the first skid plate 1 and the second skid plate 2 to ensure that the first skid plate 1 and the second skid plate 2 are accurately positioned and fixed before welding can proceed.

[0020] like Figures 1 to 4As shown, the first clamping device includes a first clamping bracket 6, a first clamping arm 7 rotatably mounted on the first clamping bracket 6, a first upper clamping block 8 mounted on the first clamping arm 7, a first lower clamping block 9 mounted on the first clamping bracket 6 and cooperating with the first upper clamping block 8, and a first driver 10 mounted on the first clamping bracket 6 for providing a driving force to rotate the first clamping arm 7. The first clamping bracket 6 is vertically mounted on the base 15, and the rotation center line of the first clamping arm 7 is parallel to a first direction, which is a horizontal direction. Multiple first upper clamping blocks 8 and first lower clamping blocks 9 are provided, and the number of first upper clamping blocks 8 and first lower clamping blocks 9 is the same. The first lower clamping block 9 cooperates with the first upper clamping block 8 to clamp the first guard plate 1 at its first end. In the clamping state, the first lower clamping block 9 is below the first guard plate 1 and in contact with the bottom surface of the first guard plate 1, while the first upper clamping block 8 is above the first guard plate 1 and in contact with the top surface of the first guard plate 1. One end of the first clamping arm 7 is rotatably connected to the first driver 10, and the first upper clamping block 8 is fixedly disposed at the other end of the first clamping arm 7. The first clamping arm 7 is rotatably connected to the first clamping bracket 6 at the position between the two ends. When the first driver 10 is working, it can drive the first clamping arm 7 to rotate up and down, thereby realizing the clamping and release of the first guard plate 1. The first driver 10 is a hydraulic cylinder. The piston rod of the first driver 10 is rotatably connected to the first clamping arm 7, and the cylinder body of the first driver 10 is rotatably connected to the first clamping bracket 6.

[0021] like Figure 4 As shown, in this embodiment, two first upper clamping blocks 8 are provided, and the two first upper clamping blocks 8 are on the same straight line parallel to the second direction. The second direction is horizontal and perpendicular to the first direction. Two first lower clamping blocks 9 are also provided, and the two first lower clamping blocks 9 are on the same straight line parallel to the width direction of the first guard plate 1. In the clamping state, the two first lower clamping blocks 9 cooperate with the two first upper clamping blocks 8 to clamp the first guard plate 1 at both ends in the width direction of the first guard plate 1, respectively. The width direction of the first guard plate 1 is parallel to the second direction.

[0022] like Figure 4As shown, the first positioning device includes a first left bracket 11, a first right bracket 12, a first left positioning pin 13 disposed on the first left bracket 11, and a first right positioning pin 14 disposed on the first right bracket 12. The first left bracket 11 and the first right bracket 12 are vertically disposed on the base 15, and the first clamping bracket 6, the first left bracket 11, and the first right bracket 12 are on the same straight line parallel to the first direction. The first left positioning pin 13 is vertically disposed on the top of the first left bracket 11, and the first right positioning pin 14 is vertically disposed on the top of the first right bracket 12. The first left positioning pin 13 and the first right positioning pin 14 cooperate to position the first guard plate 1. The first guard plate 1 is provided with two positioning holes for the first left positioning pin 13 and the first right positioning pin 14 to be inserted respectively.

[0023] like Figures 1 to 3 and Figure 6 As shown, the second clamping device includes a second clamping bracket 16, a first auxiliary bracket 20, a second clamping arm 17 rotatably mounted on the second clamping bracket 16, a second driver 19 for providing a driving force to rotate the second clamping arm 17, a second upper clamping block 18 mounted on the second clamping arm 17, a second lower clamping block 48 mounted on the second clamping bracket 16 and cooperating with the second upper clamping block 18, and a first auxiliary lower clamping block 25 mounted on the first auxiliary bracket 20 and cooperating with the second upper clamping block 18. Multiple second upper clamping blocks 18 are provided. The second clamping bracket 16 and the first auxiliary bracket 20 are vertically mounted on the base 15, and the rotation center line of the second clamping arm 17 is parallel to the second direction. The second lower clamping block 48 cooperates with one of the second upper clamping blocks 18 to clamp the second guard plate 2 at one end. The first auxiliary lower clamping block 25 cooperates with another second upper clamping block 18 to clamp the ends of the second guard plate 2 and the first guard plate 1 at the other end of the second guard plate 2. The ends of the first guard plate 1 and the second guard plate 2 are stacked together. One end of the second clamping arm 17 is rotatably connected to the second driver 19. The second upper clamping block 18 is fixedly mounted on the second clamping arm 17. The second clamping arm 17 is rotatably connected to the second clamping bracket 16 at the position between its two ends. When the second driver 19 is working, it can drive the second clamping arm 17 to rotate up and down, thereby realizing the clamping and release of the first guard plate 1 and the second guard plate 2. The second driver 19 is a hydraulic cylinder. The piston rod of the second driver 19 is rotatably connected to the second clamping arm 17, and the cylinder body of the second driver 19 is rotatably connected to the second clamping bracket 16.

[0024] like Figures 1 to 3 and Figure 7As shown, the third clamping device includes a third clamping bracket 26, a second auxiliary bracket 30, a third auxiliary bracket 31, a third clamping arm 27 rotatably mounted on the third clamping bracket 26, a third driver 29 for providing a driving force to rotate the third clamping arm 27, a third upper clamping block 28 mounted on the third clamping arm 27, a third lower clamping block 21 mounted on the third clamping bracket 26 and cooperating with the third upper clamping block 28, a second auxiliary lower clamping block 32 mounted on the second auxiliary bracket 30 and cooperating with the third upper clamping block 28, and a third auxiliary lower clamping block 33 mounted on the third auxiliary bracket 31 and cooperating with the third upper clamping block 28. Multiple third upper clamping blocks 28 are provided. The third clamping bracket 26, the second auxiliary bracket 30, and the third auxiliary bracket 31 are vertically mounted on the base 15, and the rotation center line of the third clamping arm 27 is parallel to the second direction. The third lower clamping block 21 cooperates with one of the third upper clamping blocks 28 to clamp the second guard plate 2 at one end. The third auxiliary lower clamping block 33 cooperates with another third upper clamping block 28 to clamp the ends of the second guard plate 2 and the first guard plate 1 at the other end of the second guard plate 2, with the ends of the first guard plate 1 and the second guard plate 2 stacked together. The second auxiliary lower clamping block 32 cooperates with the third upper clamping block 28 to clamp the second guard plate 2 at a position between the two ends of the second guard plate 2. One end of the third clamping arm 27 is rotatably connected to the third driver 29. The third upper clamping block 28 is fixedly mounted on the third clamping arm 27. The third clamping arm 27 is rotatably connected to the third clamping bracket 26 at a position between its two ends. When the third driver 29 is working, it can drive the third clamping arm 27 to rotate up and down, thereby achieving the clamping and release of the first guard plate 1 and the second guard plate 2. The third driver 29 is a hydraulic cylinder. The piston rod of the third driver 29 is rotatably connected to the third clamping arm 27, and the cylinder body of the third driver 29 is rotatably connected to the third clamping bracket 26.

[0025] like Figures 1 to 3 and Figure 7 As shown, the second positioning device includes a second positioning cylinder 22 mounted on the second auxiliary support 30. The second positioning cylinder 22 is connected to the second positioning seat 23, and a second positioning pin 24 is mounted on the second positioning seat 23. The second positioning cylinder 22 is vertically positioned. The second positioning seat 23 is fixedly connected to the piston rod of the second positioning cylinder 22. The second positioning cylinder 22 controls the second positioning seat 23 to move vertically. The second positioning pin 24 is vertically positioned, and the second guard plate 2 has a positioning hole for the second positioning pin 24 to be inserted. The second positioning device is integrated into the third clamping device, which effectively positions the second guard plate 2 while reducing the space occupied.

[0026] like Figures 1 to 3 and Figure 5As shown, the third positioning device also includes a third positioning bracket 3 and a third positioning cylinder 34 mounted on the third positioning bracket 3. The third positioning cylinder 34 is connected to a third positioning seat 35. A positioning block 37 and a third positioning pin 36 are mounted on the third positioning seat 35. The third positioning cylinder 34 is horizontally positioned. The third positioning bracket 3 is vertically mounted on the base 15, and the third positioning cylinder 34 is horizontally positioned on the third positioning bracket 3. The third positioning seat 35 is fixedly connected to the piston rod of the third positioning cylinder 34. The third positioning cylinder 34 controls the third positioning seat 35 to move horizontally. The third positioning pin 36 is horizontally positioned. The first small bracket 4 is located below the first guard plate 1. The first small bracket 4 and the first guard plate 1 have been pre-welded together. The first small bracket 4 has a positioning hole for inserting the third positioning pin 36. One third positioning pin 36 is provided. The positioning block 37 is fixedly mounted on the third positioning seat 35. The shape of the positioning groove matches the shape of the first small bracket 4. The positioning groove contains a first positioning surface, a second positioning surface, and a third positioning surface that contact the first small bracket 4. The first positioning surface is located below the first positioning pin, and the second and third positioning surfaces are located on the left and right sides of the first positioning pin, respectively. The first positioning surface contacts the bottom of the first small bracket 4, and the second and third positioning surfaces contact the opposite side surfaces of the first small bracket 4, respectively. Together with the third positioning pin 36, the positioning of the first small bracket 4 is more accurate.

[0027] like Figures 1 to 3 and Figure 8As shown, the fourth clamping device includes a fourth clamping bracket 38, a fourth clamping arm 39 rotatably mounted on the fourth clamping bracket 38, a first side clamping block 40 mounted on the fourth clamping arm 39, a fifth clamping arm 46 rotatably mounted, a second side clamping block 41 mounted on the fifth clamping arm 46, a fourth driver 44 mounted on the fourth clamping bracket 38 for providing a driving force to rotate the fourth clamping arm 39, and a fifth driver 45 mounted on the fourth clamping bracket 38 for providing a driving force to rotate the fifth clamping arm 46. A fourth positioning cylinder 47 is mounted on the fourth clamping bracket 38 and connected to a fourth positioning seat 42. A fourth positioning pin 43 is mounted on the fourth positioning seat 42. The fourth positioning seat 42 and the second side clamping block 41 are arranged opposite to each other, and the fourth positioning cylinder 47 is horizontally positioned. The fourth clamping bracket 38 is vertically mounted on the base 15, and the rotation center lines of the fourth clamping arm 39 and the fifth clamping arm 46 are parallel to the horizontal direction. One first side clamping block 40 and one second side clamping block 41 are provided. A fourth positioning cylinder 47 is provided on the fourth clamping bracket 38. The fourth positioning cylinder 47 is horizontally positioned and connected to the fourth positioning seat 42. A fourth positioning pin 43 is provided on the fourth positioning seat 42. The fourth positioning seat 42 and the second side clamping block 41 are arranged opposite to each other. The fourth positioning seat 42 cooperates with the second side clamping block 41 to clamp one side wall of the second small bracket 5. At the same time, the fourth positioning seat 42 cooperates with the first side clamping block 40 to clamp the other side wall of the second small bracket 5. The fourth positioning seat 42 is fixedly connected to the piston rod of the fourth positioning cylinder 47. The fourth positioning cylinder 47 controls the fourth positioning seat 42 to move horizontally. The fourth positioning pin 43 is horizontally positioned. The second small bracket 5 is located below the second guard plate 2. The second small bracket 5 and the second guard plate 2 have been pre-welded. The second small bracket 5 is provided with a positioning hole for the fourth positioning pin 43 to be inserted. One fourth positioning pin 43 is provided. The fourth positioning cylinder 47 extends, pushing the fourth positioning seat 42 to move until the two outer surfaces of the fourth positioning seat 42 contact the two side walls of the second small bracket 5. Simultaneously, the fourth positioning pin 43 inserts into the positioning hole on the second small bracket 5. The fourth positioning seat 42 cooperates with the fourth upper clamping block and the fourth lower clamping block to clamp the second small bracket 5. One end of the fourth clamping arm 39 is rotatably connected to the fourth driver 44. The first side clamping block 40 is fixedly mounted on the other end of the fourth clamping arm 39. The fourth clamping arm 39 is rotatably connected to the fourth clamping bracket 38 at the position between the two ends. When the fourth driver 44 is working, it can drive the fourth clamping arm 39 to rotate up and down. The fourth clamping arm 39 drives the first side clamping block 40 to rotate, thereby achieving clamping and releasing of the side walls of the second small bracket 5. The fourth driver 44 is a hydraulic cylinder. The piston rod of the fourth driver 44 is rotatably connected to the fourth clamping arm 39, and the cylinder body of the fourth driver 44 is rotatably connected to the fourth clamping bracket 38.One end of the fifth clamping arm 46 is rotatably connected to the fifth actuator 45. The first side clamping block 40 is fixedly disposed at the other end of the fifth clamping arm 46. The fifth clamping arm 46 is rotatably connected to the fifth clamping bracket at the position between the two ends. When the fifth actuator 45 is working, it can drive the fifth clamping arm 46 to rotate up and down. The fifth clamping arm 46 drives the first side clamping block 40 to rotate, thereby realizing the clamping and release of the other side wall of the second small bracket 5. The fifth actuator 45 is a hydraulic cylinder. The piston rod of the fifth actuator 45 is rotatably connected to the fifth clamping arm 46, and the cylinder body of the fifth actuator 45 is rotatably connected to the fifth clamping bracket.

[0028] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A welding apparatus for producing vehicle engine compartment shroud assemblies, characterized in that: The device includes a first clamping device for clamping the first guard plate at its first end, a second clamping device and a third clamping device for simultaneously clamping the second end of the second guard plate and the first guard plate, a fourth clamping device for clamping and positioning the second small bracket, a first positioning device for positioning the first guard plate, a second positioning device for positioning the second guard plate, and a third positioning device for positioning the first small bracket. The third positioning device includes a positioning block and a positioning pin. The positioning block is provided with a positioning groove for embedding the first small bracket, and the positioning pin is inserted into the positioning groove.

2. The welding apparatus for producing vehicle engine compartment shroud assemblies according to claim 1, characterized in that: The first clamping device includes a first clamping bracket, a first clamping arm rotatably disposed on the first clamping bracket, a first upper clamping block disposed on the first clamping arm, and a first lower clamping block disposed on the first clamping bracket and cooperating with the first upper clamping block.

3. The welding apparatus for producing vehicle engine compartment shroud assemblies according to claim 1, characterized in that: The first positioning device includes a first left bracket, a first right bracket, a first left positioning pin disposed on the first left bracket, and a first right positioning pin disposed on the first right bracket.

4. The welding apparatus for producing vehicle engine compartment shroud assemblies according to any one of claims 1 to 3, characterized in that: The second clamping device includes a second clamping bracket, a first auxiliary bracket, a second clamping arm rotatably mounted on the second clamping bracket, a second upper clamping block mounted on the second clamping arm, a second lower clamping block mounted on the second clamping bracket and cooperating with the second upper clamping block, and a first auxiliary lower clamping block mounted on the first auxiliary bracket and cooperating with the second upper clamping block. Multiple second upper clamping blocks are provided.

5. The welding apparatus for producing vehicle engine compartment shroud assemblies according to claim 4, characterized in that: The third clamping device includes a third clamping bracket, a second auxiliary bracket, a third auxiliary bracket, a third clamping arm rotatably mounted on the third clamping bracket, a third upper clamping block mounted on the third clamping arm, a third lower clamping block mounted on the third clamping bracket and cooperating with the third upper clamping block, a second auxiliary lower clamping block mounted on the second auxiliary bracket and cooperating with the third upper clamping block, and a third auxiliary lower clamping block mounted on the third auxiliary bracket and cooperating with the third upper clamping block. Multiple third upper clamping blocks are provided.

6. The welding apparatus for producing vehicle engine compartment shroud assemblies according to claim 5, characterized in that: The second positioning device includes a second positioning cylinder mounted on the second auxiliary bracket. The second positioning cylinder is connected to a second positioning seat, and a second positioning pin is mounted on the second positioning seat. The second positioning cylinder is vertically positioned.

7. The welding apparatus for producing vehicle engine compartment shroud assemblies according to any one of claims 1 to 3, characterized in that: The third positioning device further includes a third positioning bracket and a third positioning cylinder disposed on the third positioning bracket. The third positioning cylinder is connected to a third positioning seat. The positioning block and the positioning pin are disposed on the third positioning seat. The third positioning cylinder is horizontally positioned.

8. The welding apparatus for producing vehicle engine compartment shroud assemblies according to any one of claims 1 to 3, characterized in that: The fourth clamping device includes a fourth clamping bracket, a fourth clamping arm rotatably mounted on the fourth clamping bracket, a first side clamping block mounted on the fourth clamping arm, a fifth clamping arm rotatably mounted on the fifth clamping arm, and a second side clamping block mounted on the fifth clamping arm. A fourth positioning cylinder is mounted on the fourth clamping bracket and connected to a fourth positioning seat. A fourth positioning pin is mounted on the fourth positioning seat. The fourth positioning seat and the second side clamping block are arranged opposite to each other, and the fourth positioning cylinder is horizontally mounted.

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