Tractor cover welding device

Abstract

The utility model discloses a tractor cover welding device, and relates to the technical field of welding equipment. Two machine cover clamping mechanisms, a welding gun moving mechanism and an electric welding mechanism are installed on the machine frame. The two machine cover clamping mechanisms are oppositely arranged in the X direction. The welding gun moving mechanism is arranged on the outer side of the machine cover clamping mechanism in the Y direction and comprises an X-direction welding gun moving mechanism and a vertical welding gun moving mechanism; the X-direction welding gun moving mechanism is installed on the rack, and the vertical welding gun moving mechanism is installed at the driving end of the X-direction welding gun moving mechanism. The electric welding mechanism comprises a welding gun, and the welding gun is installed at the driving end of the vertical welding gun moving mechanism. The welding device can replace a traditional manual welding mode, the consistency of welding seam forming is guaranteed, the welding quality is improved, and the welding efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to welding equipment technical field especially relates to a tractor bonnet welding device. BACKGROUND

[0002] The tractor bonnet is assembled on the outer surface of the engine of the tractor, belongs to the appearance parts of the tractor, and appearance quality requirements are relatively strict. In order to better facilitate engine heat dissipation, the plate material of the tractor bonnet is designed to be relatively thin, and belongs to the thin plate welding part. The skill requirement of the welder is very high in actual welding.

[0003] The rear end of the tractor bonnet has a flange, and a plurality of openings are formed in the flange. The openings are arranged to release the stress generated when the tractor bonnet is shaped, to prevent tearing. After shaping, a small bracket is welded at the opening of the flange of the tractor bonnet. The first purpose is to enhance the mechanical strength of the flange, and the second purpose is to facilitate the installation of a sealing strip on the flange.

[0004] When welding the opening and the small bracket, the traditional method is manual welding. Due to the uneven skill levels of welders, quality problems often occur due to welding defects, especially welding defects such as welding through and welding bumps, which not only affect the strength of the tractor bonnet but also affect the overall appearance quality of the tractor bonnet. At the same time, due to the large difference in the consistency of the weld formation during manual welding, the welding quality of the tractor bonnet can only be ensured by grinding and repair welding after welding. SUMMARY

[0005] Therefore, the technical problem to be solved by the utility model is to provide a tractor bonnet welding device that can replace the traditional manual welding method, ensure the consistency of weld formation, improve welding quality, and improve welding efficiency.

[0006] To solve the above technical problems, the technical scheme of the utility model is as follows:

[0007] A tractor bonnet welding device includes a rack. Two bonnet clamping mechanisms, a welding gun moving mechanism, and an electric welding mechanism are installed on the rack.

[0008] The two bonnet clamping mechanisms are arranged opposite to each other along the X direction, and are used to clamp and fix the tractor bonnet together.

[0009] The welding gun moving mechanism is arranged outside the bonnet clamping mechanism along the Y direction. The welding gun moving mechanism includes an X-direction welding gun moving mechanism and a vertical welding gun moving mechanism. The X-direction welding gun moving mechanism is installed on the rack, and the vertical welding gun moving mechanism is installed on the driving end of the X-direction welding gun moving mechanism.

[0010] The electric welding mechanism comprises a welding gun mounted on the driving end of the vertical welding gun moving mechanism for driving the welding gun to move vertically reciprocally, and the X-direction welding gun moving mechanism for driving the vertical welding gun moving mechanism to move the welding gun reciprocally along the X-direction.

[0011] Preferably, the machine cover clamping mechanism comprises a clamping mounting base, a clamping power member, a clamping arm, and a symbol-shaped base;

[0012] The clamping mounting base is fixedly arranged on the machine frame;

[0013] The clamping power member is arranged on the outside of the clamping mounting base along the X-direction, and is used to drive the clamping arm to rotate towards or away from the side of the machine frame;

[0014] The clamping arm is rotatably arranged on the clamping mounting base, one end of the clamping arm is hingedly connected to the driving end of the clamping power member, and the other end of the clamping arm is provided with a symbol-shaped clamping block;

[0015] The symbol-shaped base is arranged on the inside of the clamping mounting base along the X-direction, and is matched with the symbol-shaped clamping block.

[0016] Preferably, the clamping arm is provided with a pressing positioning block arranged close to and on the inside of the symbol-shaped clamping block, and matched with the symbol-shaped base;

[0017] The symbol-shaped base is provided with a pressing surface matched with the pressing positioning block and a clamping surface matched with the symbol-shaped clamping block.

[0018] Preferably, a clamping limiting mechanism is arranged between the clamping arm and the clamping mounting base, and the clamping limiting mechanism comprises an upper clamping limiting block and a lower clamping limiting block matched with the upper clamping limiting block;

[0019] The upper clamping limiting block is in a convex structure, and the lower clamping limiting block is in a concave structure.

[0020] Preferably, a pressing detection assembly is arranged between the clamping arm and the clamping mounting base, and the pressing detection assembly comprises an upper pressing sensor and a lower pressing sensor matched with the upper pressing sensor;

[0021] The upper pressing sensor is arranged on the upper clamping limiting block, and the lower pressing sensor is arranged on the lower clamping limiting block;

[0022] A positioning sensor is arranged on the machine frame, and the positioning sensor is arranged between the two machine cover clamping mechanisms and is used to detect whether the tractor cover is placed.

[0023] Preferably, the X-direction welding gun moving mechanism comprises an X-direction power element, a screw-nut assembly, an X-direction moving mounting plate and an X-direction slider rail assembly.

[0024] The X-direction power element is mounted on the rack.

[0025] The screw-nut assembly is mounted on the rack along the X-direction, the screw of the screw-nut assembly is drivingly connected with the X-direction power element, and the nut of the screw-nut assembly is fixedly connected with the X-direction moving mounting plate.

[0026] The X-direction slider rail assembly is mounted between the rack and the X-direction moving mounting plate.

[0027] Preferably, the vertical welding gun moving mechanism comprises a vertical power element, a vertical moving mounting plate and a vertical slider rail assembly.

[0028] The vertical power element is mounted on the X-direction moving mounting plate.

[0029] The vertical moving mounting plate is arranged outside the X-direction moving mounting plate along the Y-direction, and the position-adjustable welding gun is mounted on the vertical moving mounting plate.

[0030] The vertical slider rail assembly is mounted between the X-direction moving mounting plate and the vertical moving mounting plate.

[0031] Preferably, an X-direction position detection assembly is arranged between the X-direction moving mounting plate and the rack, and the X-direction position detection assembly comprises a position distance sensor and two position degree detection blocks matched with the position distance sensor.

[0032] The position distance sensor is mounted on the X-direction moving mounting plate.

[0033] The two position degree detection blocks are mounted on the rack and are arranged on the two sides of the position distance sensor along the X-direction.

[0034] Preferably, the electric welding mechanism comprises an electric welding machine body and a wire feeder assembly matched with the electric welding machine body, and the welding wire output by the wire feeder assembly is connected with the welding gun.

[0035] Preferably, two positioning pins are mounted on the rack, the two positioning pins are arranged along the X-direction, and the two positioning pins are arranged between the two cover clamping mechanisms.

[0036] Two symbol-shaped damping blocks are mounted on the rack, the two symbol-shaped damping blocks are arranged opposite to each other along the X-direction, and the symbol-shaped damping blocks are arranged on the other side of the cover clamping mechanism relative to the welding gun moving mechanism along the Y-direction.

[0037] The utility model discloses the beneficial effect is:

[0038] Because the application includes frame;Two machine cover clamping mechanisms, welding torch moving mechanism, electric welding mechanism are installed on the frame;Among them, two machine cover clamping mechanisms are oppositely arranged along the X direction, and the two machine cover clamping mechanisms are used for clamping and fixing the tractor cover together;The welding torch moving mechanism is arranged on the outside of the machine cover clamping mechanism along the Y direction, and the welding torch moving mechanism includes an X-direction welding torch moving mechanism and a vertical welding torch moving mechanism;The X-direction welding torch moving mechanism is installed on the frame, and the vertical welding torch moving mechanism is installed on the driving end of the X-direction welding torch moving mechanism;The electric welding mechanism includes a welding torch, and the welding torch is installed on the driving end of the vertical welding torch moving mechanism, and the vertical welding torch moving mechanism is used for driving the welding torch to reciprocate along the vertical direction, and the X-direction welding torch moving mechanism is used for driving the vertical welding torch moving mechanism to drive the welding torch to reciprocate along the X direction.When the tractor cover is placed on the frame, the two machine cover clamping mechanisms are used for clamping and fixing the tractor cover together, and the tractor cover is fixed, and after the fixing is completed, the welding torch is driven by the X-direction welding torch moving mechanism and the vertical welding torch moving mechanism in the same vertical plane, and the welding torch is moved along the X direction and the vertical direction, and the flanging of the tractor cover is welded, so that the opening on the flanging and the small support are welded together, which replaces the traditional manual welding mode, thereby improving the strength of the tractor cover and the overall appearance quality of the tractor cover;Moreover, the consistency of the weld formation is also ensured, the welding quality is improved, and the welding efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0039] The utility model is further illustrated below in connection with the drawings and examples.

[0040] Figure 1 It is the structure schematic diagram of tractor cover welding device of the utility model embodiment;

[0041] Figure 2 It is Figure 1 The A part enlarged view of;

[0042] Figure 3 It is Figure 1 The B part enlarged view of;

[0043] Figure 4 It is Figure 1 The structure schematic diagram when machine cover clamping mechanism clamps in;

[0044] Figure 5 It is Figure 1 The structure schematic diagram when placing tractor cover in;

[0045] Figure 6 It is Figure 1 The structure schematic diagram when machine cover clamping mechanism clamps tractor cover in;

[0046] Figure 7 is Figure 6 a C part enlarged view of

[0047] in the figure:

[0048] 1, frame; 11, positioning pin; 12, symbol type shock absorbing block;

[0049] 2, cover clamping mechanism; 21, clamping mounting seat; 22, clamping power piece; 23, clamping arm; 24, symbol type seat; 241, pressing surface; 242, clamping surface; 25, symbol type clamping block; 26, pressing positioning block; 27, clamping limiting mechanism; 271, upper clamping limiting block; 272, lower clamping limiting block; 28, pressing detection assembly; 281, upper pressing sensor; 282, lower pressing sensor; 29, positioning sensor;

[0050] 3, welding gun moving mechanism;

[0051] 4, electric welding mechanism; 41, welding gun; 42, electric welding machine body; 43, wire feeder assembly;

[0052] 5, X direction welding gun moving mechanism; 51, X direction power piece; 52, screw nut assembly; 53, X direction moving mounting plate; 54, X direction sliding block sliding rail assembly; 55, X direction position detection assembly; 551, position distance sensor; 552, position degree detection block;

[0053] 6, vertical welding gun moving mechanism; 61, vertical power piece; 62, vertical moving mounting plate; 63, vertical sliding block sliding rail assembly;

[0054] 7, tractor cover;

[0055] In the figure, the X direction is the width direction of the frame, and the Y direction is the length direction of the frame. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the utility model is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model.

[0057] As Figures 1 to 7 shown in the drawings, the utility model includes frame 1; two cover clamping mechanisms 2, welding gun moving mechanisms 3 and electric welding mechanisms 4 are installed on the frame 1.

[0058] The two cover clamping mechanisms 2 are oppositely arranged along the X direction, and are used for jointly clamping and fixing the tractor cover 7 in cooperation. The welding gun moving mechanism 3 is arranged outside the cover clamping mechanism 2 along the Y direction, and comprises an X-direction welding gun moving mechanism 5 and a vertical welding gun moving mechanism 6. The X-direction welding gun moving mechanism 5 is installed on the rack 1, and the vertical welding gun moving mechanism 6 is installed at the driving end of the X-direction welding gun moving mechanism 5. The electric welding mechanism 4 comprises a welding gun 41, which is installed at the driving end of the vertical welding gun moving mechanism 6. The vertical welding gun moving mechanism 6 is used for driving the welding gun 41 to reciprocate along the vertical direction, and the X-direction welding gun moving mechanism 5 is used for driving the vertical welding gun moving mechanism 6 to drive the welding gun 41 to reciprocate along the X direction.

[0059] When the tractor cover 7 is placed on the rack 1, the two cover clamping mechanisms 2 are used for jointly clamping and fixing the tractor cover 7 in cooperation. After the fixation is completed, the welding gun 41 is driven by the X-direction welding gun moving mechanism 5 and the vertical welding gun moving mechanism 6 to move along the X direction and the vertical direction in the same vertical plane, so as to weld the flanging of the tractor cover 7, and the opening on the flanging and the small support are welded together, thereby replacing the traditional manual welding mode. Thus, the strength of the tractor cover 7 and the overall appearance quality of the tractor cover 7 are improved. Moreover, the consistency of the weld formation is ensured, the welding quality is improved, and the welding efficiency is improved.

[0060] In the application, the cover clamping mechanism 2 comprises a clamping mounting seat 21, a clamping power member 22, a clamping arm 23, and a symbol type seat 24. The clamping mounting seat 21 is fixedly arranged on the rack 1. The clamping power member 22 is arranged outside the clamping mounting seat 21 along the X direction, and is used for driving the clamping arm 23 to rotate towards or away from the rack 1. The clamping arm 23 is rotatably arranged on the clamping mounting seat 21, one end of the clamping arm 23 is hingedly connected to the driving end of the clamping power member 22, and the other end of the clamping arm 23 is provided with a symbol type clamping block 25. The symbol type seat 24 is arranged inside the clamping mounting seat 21 along the X direction, and is matched with the symbol type clamping block 25.

[0061] Preferably, the clamping power member 22 is a pneumatic cylinder, and is arranged vertically. When the telescopic rod of the clamping power member 22 moves upwards, the other end of the clamping arm 23 is driven to rotate towards the rack 1, so that the symbol type clamping block 25 moves towards the side close to the symbol type seat 24. The two are matched with each other, and are used for clamping and fixing the tractor cover 7 between the two.

[0062] Preferably, the clamping arm 23 is provided with a pressing positioning block 26, which is arranged close to and inside the symbol clamping block 25 and is matched with the symbol seat 24; wherein the symbol seat 24 is provided with a pressing surface 241 matched with the pressing positioning block 26 and a clamping surface 242 matched with the symbol clamping block 25.

[0063] During the movement of the symbol clamping block 25 driven by the clamping arm 23 towards the symbol seat 24, the pressing positioning block 26 is also moved, and finally the pressing positioning block 26 is pressed against the pressing surface 241 to press the tractor cover 7.

[0064] The clamping arm 23 and the clamping mounting seat 21 are provided with a clamping limiting mechanism 27; the clamping limiting mechanism 27 includes an upper clamping limiting block 271 and a lower clamping limiting block 272 matched therewith; wherein the upper clamping limiting block 271 is a convex structure, and the lower clamping limiting block 272 is a concave structure. When the tractor cover 7 is fixed, the upper clamping limiting block 271 can extend into the lower clamping limiting block 272, preventing the clamping arm 23 from deviating, thereby limiting the symbol clamping block 25 on the clamping arm 23 from clamping the tractor cover 7 against the clamping surface 242 and limiting the pressing positioning block 26 from pressing the tractor cover 7 against the pressing surface 241, preventing the pressing from being deviated or not clamped in place, and ensuring the pressing and clamping effect on the tractor cover 7.

[0065] The clamping arm 23 and the clamping mounting seat 21 are provided with a pressing detection assembly 28; the pressing detection assembly 28 is used to detect whether the tractor cover 7 is pressed in place; the pressing detection assembly 28 includes an upper pressing sensor 281 and a lower pressing sensor 282 matched therewith; wherein the upper pressing sensor 281 is installed on the upper clamping limiting block 271, and the lower pressing sensor 282 is installed on the lower clamping limiting block 272; the frame 1 is provided with a positioning sensor 29 arranged between the two cover clamping mechanisms 2, which is used to detect whether the tractor cover 7 is placed.

[0066] In the present application, the X-direction welding gun moving mechanism 5 includes an X-direction power member 51, a lead screw nut assembly 52, an X-direction moving mounting plate 53, and an X-direction sliding block sliding rail assembly 54; wherein the X-direction power member 51 is installed on the frame 1; the lead screw nut assembly 52 is installed on the frame 1 along the X-direction, the lead screw of the lead screw nut assembly 52 is drivingly connected with the X-direction power member 51, and the nut of the lead screw nut assembly 52 is fixedly connected with the X-direction moving mounting plate 53; the X-direction sliding block sliding rail assembly 54 is installed between the frame 1 and the X-direction moving mounting plate 53.

[0067] Preferably, the X-direction power element 51 is a servo motor, under the drive of the X-direction power element 51, the lead screw of the lead screw nut assembly 52 can be driven to rotate, so that the nut of the lead screw nut assembly 52 drives the X-direction moving mounting plate 53 to move along the X-direction, realizing the movement of the vertical welding gun moving mechanism 6 mounted on the X-direction moving mounting plate 53.

[0068] The vertical welding gun moving mechanism 6 comprises a vertical power element 61, a vertical moving mounting plate 62, and a vertical sliding block sliding rail assembly 63; the vertical power element 61 is mounted on the X-direction moving mounting plate 53; the vertical moving mounting plate 62 is arranged outside the X-direction moving mounting plate 53 along the Y-direction, and the position-adjustable welding gun 41 is mounted on the vertical moving mounting plate 62; the vertical sliding block sliding rail assembly 63 is mounted between the X-direction moving mounting plate 53 and the vertical moving mounting plate 62. It is worth noting that the position-adjustable welding gun 41 means that the welding gun 41 is rotationally connected with the vertical moving mounting plate 62, and the welding end of the welding gun 41 can rotate towards the side close to or away from the tractor hood 7 in the vertical plane.

[0069] Preferably, the vertical power element 61 is an electric cylinder, and the vertical power element 61 drives the vertical moving mounting plate 62 to move reciprocally along the vertical direction, realizing the movement of the welding gun 41.

[0070] The X-direction moving mounting plate 53 and the rack 1 are provided with an X-direction position detection assembly 55; the X-direction position detection assembly 55 comprises a position distance sensor 551 and two position degree detection blocks 552 matched with the position distance sensor 551; the position distance sensor 551 is mounted on the X-direction moving mounting plate 53; the two position degree detection blocks 552 are mounted on the rack 1 and are arranged on the two sides of the position distance sensor 551 along the X-direction.

[0071] The X-direction position detection assembly 55 is used for detecting the X-direction moving distance of the X-direction moving mounting plate 53; when the X-direction moving mounting plate 53 moves, the position distance sensor 551 is driven to move, and the position distance sensor 551 and the two position degree detection blocks 552 are matched, so as to determine the current position of the X-direction moving mounting plate 53, i.e., the X-direction position of the welding gun 41.

[0072] In the present application, the electric welding mechanism 4 comprises an electric welding machine body 42 and a wire feeder assembly 43 matched with the electric welding machine body 42, and the welding wire output by the wire feeder assembly 43 is connected with the welding gun 41.

[0073] The rack 1 is provided with two positioning pins 11 arranged along the X direction and located between the two cover clamping mechanisms 2, which are used to position the tractor cover 7 after the tractor cover 7 is placed on the rack 1 to prevent the tractor cover 7 from moving on the rack 1. The rack 1 is provided with two symbol-shaped damping blocks 12 arranged oppositely along the X direction and located on the other side of the cover clamping mechanism 2 along the Y direction relative to the welding gun moving mechanism 3, which are used to support the other end of the tractor cover 7 and reduce vibration to prevent the vibration from affecting the welding effect and improve the welding quality.

[0074] In use, the tractor cover 7 is placed on the rack 1, the two symbol-shaped damping blocks 12 and the two symbol-shaped seats 24 are used to position the tractor cover 7, and the two positioning pins 11 are inserted into the positioning holes of the tractor cover 7 for accurate positioning.

[0075] The clamping power member 22 drives the symbol-shaped clamping blocks 25 and the pressing positioning blocks 26 mounted on the clamping arms 23 to move towards the symbol-shaped seats 24 until the tractor cover 7 is clamped and pressed, at which time the upper clamping limiting blocks 271 are inserted into the lower clamping limiting blocks 272, and the upper pressing sensor 281 cooperates with the lower pressing sensor 282 to detect that the tractor cover 7 is clamped in place.

[0076] The X-direction power member 51 drives the X-direction moving mounting plate 53 to move in the X direction, in the process, the vertical power member 61 drives the vertical moving mounting plate 62 to move vertically, driving the welding gun 41 to move in the X direction and the vertical direction to weld the tractor cover 7, in the process of welding, the welding method adopted is intermittent welding, after welding a section of open weld, the welding gun 41 automatically cuts off the electric arc and automatically moves to the next open section to continue welding, after the intermittent welding of the entire rear end of the tractor cover 7 is completed, the welding gun 41 is automatically returned to the original initial position by the X-direction power member 51 and the vertical power member 61, preparing for the welding of the next tractor cover 7.

[0077] The above only describes the preferred embodiments of the present application and is not used to limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A tractor hood welding apparatus comprising a frame; characterised in that, Two cover clamping mechanisms, a welding gun moving mechanism and a welding mechanism are installed on the rack; The two cover clamping mechanisms are oppositely arranged along the X direction and are used for clamping and fixing the tractor cover together. The welding gun moving mechanism is arranged outside the cover clamping mechanism along the Y direction, and comprises an X direction welding gun moving mechanism and a vertical welding gun moving mechanism. The X direction welding gun moving mechanism is installed on the rack, and the vertical welding gun moving mechanism is installed on the driving end of the X direction welding gun moving mechanism.

2. The tractor hood welding apparatus of claim 1, wherein, The welding mechanism comprises a welding gun, which is installed on the driving end of the vertical welding gun moving mechanism. The cover clamping mechanism comprises a clamping mounting seat, a clamping power member, a clamping arm and a symbol type seat. The clamping mounting seat is fixedly arranged on the rack. The clamping power member is installed outside the clamping mounting seat along the X direction, and is used for driving the clamping arm to rotate towards or away from one side of the rack. The clamping arm is rotatably installed on the clamping mounting seat, one end of the clamping arm is hingedly connected with the driving end of the clamping power member, and the other end of the clamping arm is provided with a symbol type clamping block.

3. The tractor hood welding apparatus of claim 2, wherein, The symbol type seat is installed inside the clamping mounting seat along the X direction, and is matched with the symbol type clamping block. A pressing positioning block is installed on the clamping arm, and the pressing positioning block is arranged close to and inside the symbol type clamping block and is matched with the symbol type seat.

4. The tractor hood welding apparatus of claim 2 wherein, The symbol type seat is provided with a pressing surface matched with the pressing positioning block and a clamping surface matched with the symbol type clamping block. A clamping limiting mechanism is arranged between the clamping arm and the clamping mounting seat, and comprises an upper clamping limiting block and a lower clamping limiting block matched with the upper clamping limiting block.

5. The tractor hood welding apparatus of claim 4 wherein, The upper clamping limiting block is in a convex structure, and the lower clamping limiting block is in a concave structure. A pressing detection assembly is arranged between the clamping arm and the clamping mounting seat, and comprises an upper pressing sensor and a lower pressing sensor matched with the upper pressing sensor. The upper pressing sensor is installed on the upper clamping limiting block, and the lower pressing sensor is installed on the lower clamping limiting block.

6. The tractor hood welding apparatus of claim 1 wherein, A positioning sensor is installed on the rack, and is arranged between the two cover clamping mechanisms. The X direction welding gun moving mechanism comprises an X direction power member, a screw nut assembly, an X direction moving mounting plate and an X direction sliding block sliding rail assembly. The X direction power member is installed on the rack. The screw nut assembly is installed on the rack along the X direction, a screw rod of the screw nut assembly is drivingly connected with the X direction power member, and a nut of the screw nut assembly is fixedly connected with the X direction moving mounting plate. The X direction sliding block sliding rail assembly is installed between the rack and the X direction moving mounting plate.

7. The tractor hood welding apparatus of claim 6 wherein, The vertical welding gun moving mechanism comprises a vertical power element, a vertical moving mounting plate and a vertical sliding block sliding rail assembly; The vertical power element is mounted on the X-direction moving mounting plate; The vertical moving mounting plate is arranged outside the X-direction moving mounting plate along the Y-direction, and the position-adjustable welding gun is mounted on the vertical moving mounting plate; The vertical sliding block sliding rail assembly is mounted between the X-direction moving mounting plate and the vertical moving mounting plate.

8. The tractor hood welding apparatus of claim 6, wherein, An X-direction position detection assembly is arranged between the X-direction moving mounting plate and the rack; the X-direction position detection assembly comprises a position distance sensor and two position degree detection blocks matched with the position distance sensor; The position distance sensor is mounted on the X-direction moving mounting plate; The two position degree detection blocks are mounted on the rack and are arranged on the two sides of the position distance sensor along the X-direction.

9. The tractor hood welding apparatus of claim 1 wherein, The electric welding mechanism comprises an electric welding machine body and a wire feeder assembly matched with the electric welding machine body, and the welding wire output by the wire feeder assembly is connected with the welding gun.

10. The tractor hood welding apparatus of claim 1 wherein, Two positioning pins are mounted on the rack and are arranged along the X-direction, and the two positioning pins are arranged between the two cover clamping mechanisms; Two symbol-shaped damping blocks are mounted on the rack and are arranged opposite to each other along the X-direction, and the symbol-shaped damping blocks are arranged on the other side of the cover clamping mechanism relative to the welding gun moving mechanism along the Y-direction.

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