Laser welding device for engine support and welding process of laser welding device

Abstract

The invention discloses a laser welding device for an engine support and a welding process of the laser welding device, and belongs to the field of laser welding. Comprising a workbench, a movable welding mechanism is arranged above the outer side of the workbench, clamping moving mechanisms are arranged on the two sides of the upper surface of the workbench, and rotating clamping mechanisms are arranged on the opposite sides of the two clamping moving mechanisms; the movable welding mechanism comprises a U-shaped frame, the inner side of the U-shaped frame is fixedly connected with the upper portion of the outer side of the workbench, a penetrating type movable groove is formed in the upper surface of the U-shaped frame, a motor is fixedly installed on the front surface of the U-shaped frame, and the rear end, located on the inner side of the movable groove, of an output shaft of the motor is fixedly connected with a reciprocating lead screw. When the device is used, the laser welding gun is started for welding, the reciprocating lead screw is controlled to rotate by starting the motor, and the lead screw sleeve is controlled to drive the laser welding gun to move forwards or backwards, so that welding is carried out.

Description

Technical Field

[0001] The invention relates to the field of laser welding, and in particular to a laser welding device for an engine bracket and a welding process thereof. Background Art

[0002] The engine bracket is a component used to fix the engine. One end of the engine bracket is fixedly connected to the engine, and the other end is connected to the engine mount fixed on the vehicle body, so as to fix the engine to the vehicle body. The engine bracket is usually made of metal materials. When the current engine bracket is damaged or broken during production or daily use, it is usually necessary to use a welding device to weld and fix its connection;

[0003] Patent: CN114799626B belongs to the technical field of engine bracket processing. In order to solve the problem that the engine bracket is prone to produce unpleasant odors during welding, which is easy to have a negative impact on the health of the workers and reduce the workers' experience during welding, the invention includes a mounting base and a welding main machine fixedly mounted in the inner cavity at the lower end of the mounting base, and a welding gun is mounted on the outer wall of one end of the mounting base, and clamping and fixing components are slidably arranged on the top surfaces of both ends of the mounting base, and a water storage tank is fixedly mounted on the outer wall of one side of the mounting base, a deodorizing component is installed in the middle of the upper end of the inner cavity of the mounting base, and water pressure components are respectively arranged at both ends of the upper end of the inner cavity of the mounting base, and a transmission component is arranged at one end of the upper end of the inner cavity of the mounting base. The device realizes the removal of unpleasant odors during welding, improves welding efficiency, saves manpower, and is convenient to use;

[0004] The above technology is not convenient for double-sided welding of the engine bracket, and is not convenient for controlling the splicing of broken brackets according to the size of the brackets. In order to achieve double-sided welding of the bracket in the prior art, it is necessary to either control the clamping bracket part to rotate and flip it through a control mechanism alone, or control the welding part to move to the bottom of the bracket for welding. When double-sided welding is achieved in this way, flipping and welding are controlled separately, the control method is complicated, and it is not conducive to use, and needs to be improved. For this reason, we propose a laser welding device for an engine bracket and a welding process thereof. Summary of the invention

[0005] Purpose of the invention: The purpose of the present invention is to provide a method for facilitating double-sided welding of an engine bracket; another purpose of the present invention is to provide a bracket that can be spliced ​​by controlling the breakage according to the size of the bracket.

[0006] Technical solution: A laser welding device for an engine bracket comprises a workbench, a movable welding mechanism is arranged above the outer side of the workbench, clamping movable mechanisms are arranged on both sides of the upper surface of the workbench, and rotating clamping mechanisms are arranged on opposite sides of the two clamping movable mechanisms;

[0007] The mobile welding mechanism comprises a U-shaped frame, the inner side of the U-shaped frame is fixedly connected to the upper outer side of the workbench, a through-type moving groove is provided on the upper surface of the U-shaped frame, a motor is fixedly installed on the front surface of the U-shaped frame, a reciprocating screw is fixedly connected to the rear end of the output shaft of the motor located on the inner side of the moving groove, a screw sleeve is slidably installed on the outer side wall of the reciprocating screw, and a laser welding gun is fixedly connected to the bottom of the screw sleeve;

[0008] The rotating clamping mechanism includes a movable plate, a side of the movable plate close to the movable welding mechanism is rotatably connected to an axial column via a rotating shaft, an end of the axial column away from the movable plate is fixedly connected to an L-shaped clamping plate, a through vertical groove is provided on the right side of the L-shaped clamping plate, an adjusting bolt is rotatably connected to the inner side of the vertical groove via a rotating shaft, a lifting block is threadedly connected to the outer side of the adjusting bolt, and an active clamping plate is fixedly connected to the end of the lifting block away from the movable plate.

[0009] Furthermore, the rear surface of the U-shaped frame is fixedly connected to an air box 1, the interior of the air box 1 is slidably connected to a piston plate 1, a plurality of springs 1 are fixedly connected between the piston plate 1 and the air box 1, the front surface of the piston plate 1 is fixedly connected to a push rod, the front end of the push rod passes through the inner side of the U-shaped frame and is fixedly connected to a pressure plate.

[0010] Furthermore, guide columns are provided in front and rear of the upper surface of the U-shaped frame, the bottom ends of the guide columns penetrate into the inner side of the U-shaped frame and are fixedly connected with anti-slip blocks, the outer side wall of the guide column is fixedly connected with a second spring, the two ends of the second spring are respectively fixedly connected to the anti-slip block and the opposite side of the U-shaped frame, a connecting rod is fixedly connected between the two anti-slip blocks facing each other front and back, the opposite sides of the two anti-slip blocks located at the inner rear of the U-shaped frame are jointly fixedly connected with a U-shaped stop block, and the front surface of the U-shaped stop block is integrally formed with two inclined surfaces.

[0011] Furthermore, a wedge-shaped stop block is fixedly connected to the outer side wall of the laser welding gun.

[0012] Furthermore, the clamping moving mechanism includes a side plate, the bottom of the side plate is fixedly connected to the upper surface of the workbench, and two through-type longitudinal grooves are provided on the left side of the side plate, the interior of the longitudinal groove is rotatably connected with a bidirectional screw via a rotating shaft, the outer side wall of the bidirectional screw is threadedly connected with two threaded sleeves, the outer side wall of the threaded sleeve is fixedly connected with a rotating connecting piece 1, the outer side wall of the rotating connecting piece 1 is rotatably connected with a traction rod via a rotating shaft, the end of the traction rod away from the rotating connecting piece 1 is rotatably connected with a rotating connecting piece 2 via a rotating shaft, and the end of the rotating connecting piece 2 away from the traction rod is fixedly connected to the outer side wall of the movable plate.

[0013] Furthermore, a knob is fixedly connected to the front end of the bidirectional screw located on the upper inner side of the side plate.

[0014] Furthermore, the rear end of the bidirectional screw is fixedly connected to gear one, the rear surface of the side plate is located between the two gear ones facing each other up and down and is rotatably connected to gear two via a rotating shaft, and gear one is meshed with gear two.

[0015] Furthermore, the opposite sides of the two movable plates are fixedly connected with air box 2, the interior of the air box 2 is slidably connected with piston plate 2, the front surface of the piston plate 2 is fixedly connected with a rack, and the two air boxes 2 are fixedly connected with the air box 1 with a ventilation pipe.

[0016] Furthermore, a gear three is fixedly connected to the outer side wall of the shaft column, and the rack is meshingly connected to the gear three.

[0017] According to another aspect of the present invention, a laser welding process for an engine bracket is provided, comprising the following steps: S1, placing the engine bracket broken into two parts between the L-shaped clamping plate and the movable clamping plate on both sides respectively; by rotating the adjusting bolt, controlling the movable clamping plate to move, cooperating with the L-shaped clamping plate to clamp the column bracket, and completing the bracket fixing;

[0018] S2. Hold the two knobs and turn them. Under the meshing transmission of gear 1 and gear 2, control the rotation of multiple bidirectional screws, thereby controlling the front and rear relative threaded sleeves to move in opposite directions, driving the traction rod to move, and then pushing the moving plate to move relative to each other, so that the two sections of the bracket are spliced ​​together, completing the preliminary splicing before welding;

[0019] S3, start the motor to drive the reciprocating screw to rotate, so that the screw sleeve drives the laser welding gun to move back and forth repeatedly to weld the joint;

[0020] S4. During welding, the laser welding gun moves from front to back and welds one side of the bracket first. After one side is welded, the laser welding gun continues to move backward. At this time, it will squeeze the pressure plate, so that the air box one is inflated toward the inside of the air box two, and the control rack drives the gear three to rotate, so that the bracket is turned over. At the same time, the pressure plate will squeeze the inclined surface of the U-shaped block, so that the U-shaped block rises. When the laser welding gun moves to the end, under the push of spring two, the U-shaped block drops and stops in front of the pressure plate to ensure the stability of the bracket after it is turned over. Then, as the motor rotates, the laser welding gun moves forward to weld the splicing after the bracket is turned over to achieve double-sided welding. After the laser welding gun moves to the front, the wedge-shaped block will press against the bottom of the two anti-slip blocks in front, squeeze and rise, so that the U-shaped block rises. At this time, the pressure plate moves forward again under the push of spring one, and at this time, air box one draws out the internal gas of air box two, so that the bracket is turned over in place, which is convenient for subsequent disassembly of the bracket and welding of the other bracket to be spliced.

[0021] Beneficial effects: When the device is used, welding is performed by starting the laser welding gun, and the reciprocating screw rod can be controlled to rotate by starting the motor, and the screw rod sleeve can be controlled to drive the laser welding gun to move forward or backward, thereby performing welding;

[0022] By turning the two knobs, multiple bidirectional screws can be controlled to rotate together under the meshing transmission of gear one and gear two, so as to facilitate the control of the relative or opposite movement of the two rotating clamping mechanisms, and facilitate the splicing of brackets of different sizes by controlling the moving distance, which is convenient for subsequent welding work;

[0023] Under normal conditions, the movable splint is at the bottom. At this time, the movable splint is controlled to rise by rotating the adjusting bolt, and the bracket can be stably clamped in cooperation with the L-shaped clamping plate, which is convenient for bracket welding. When the gas box is exhausted, the gas will be filled into the inside of the gas box through the ventilation pipe. At this time, the rack drives the gear three to rotate, so that the L-shaped clamping plate and the movable splint drive the bracket to flip over and change sides, which is convenient for double-sided welding. This flipping method can realize automatic flipping during mobile welding, and there is no need to use other mechanisms to control the flipping of the bracket separately. The bracket can be positioned after flipping, and the operation method is simpler. You only need to control the laser welding gun to move back and forth repeatedly to complete the back and forth flipping and achieve the effect of double-sided welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a rear view structural schematic diagram of the present invention;

[0026] Figure 3 It is a schematic diagram of a partial cross-sectional structure of a mobile welding mechanism of the present invention in a side view;

[0027] Figure 4 It is a schematic diagram of the side view connection structure of the reciprocating screw rod, guide rod, connecting rod and laser welding gun of the present invention;

[0028] Figure 5 It is a side view structural schematic diagram of the clamping and moving mechanism of the present invention;

[0029] Figure 6 It is a schematic diagram of the partial cross-sectional side view of the connection structure of the movable plate and the second air box of the present invention;

[0030] Figure 7 It is a schematic diagram of the connection structure of the L-shaped clamping plate and the movable clamping plate of the present invention.

[0031] In the figure: 1, workbench; 2, mobile welding mechanism; 3, clamping and moving mechanism; 4, rotating clamping mechanism; 201, U-shaped frame; 202, moving slot; 203, motor; 204, reciprocating screw; 205, screw sleeve; 206, laser welding gun; 207, air box 1; 208, piston plate 1; 209, spring 1; 210, push rod; 211, pressure plate; 212, guide column; 213, anti-slip block; 214, spring 2; 215, connecting rod; 216, U-shaped block; 217, inclined surface; 218, wedge block; 301, side plate; 302, longitudinal groove; 303, bidirectional screw; 304, threaded sleeve; 305, rotating connection part 1; 306, traction rod; 307, rotating connection part 2; 308, knob; 309, gear 1; 310, gear 2; 401, moving plate; 402, shaft column; 403, L-shaped clamping plate; 404, vertical groove; 405, adjusting bolt; 406, lifting block; 407, movable splint; 408, air box 2; 409, piston plate 2; 410, rack; 411, ventilation pipe; 412, gear 3. DETAILED DESCRIPTION

[0032] In order to make the technical solution of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Example

[0034] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a laser welding device for an engine bracket is provided, comprising a workbench 1, and a movable welding mechanism 2 is arranged above the outer side of the workbench 1;

[0035] The mobile welding mechanism 2 includes a U-shaped frame 201, the inner side of the U-shaped frame 201 is fixedly connected to the outer upper side of the workbench 1, a through-type moving groove 202 is opened on the upper surface of the U-shaped frame 201, a motor 203 is fixedly installed on the front surface of the U-shaped frame 201, the rear end of the output shaft of the motor 203 is located on the inner side of the moving groove 202 and is fixedly connected to a reciprocating screw rod 204, a screw rod sleeve 205 is slidably installed on the outer side wall of the reciprocating screw rod 204, and a laser welding gun 206 is fixedly connected to the bottom of the screw rod sleeve 205;

[0036] The rear surface of the U-shaped frame 201 is fixedly connected with an air box 207, the interior of the air box 207 is slidably connected with a piston plate 208, a plurality of springs 209 are fixedly connected between the piston plate 208 and the air box 207, a push rod 210 is fixedly connected with the front surface of the piston plate 208, the front end of the push rod 210 penetrates the inner side of the U-shaped frame 201, and is fixedly connected with a pressure plate 211;

[0037] A guide column 212 is provided at the front and rear of the upper surface of the U-shaped frame 201. The bottom end of the guide column 212 penetrates the inner side of the U-shaped frame 201 and is fixedly connected with an anti-slip block 213. The outer wall of the guide column 212 is fixedly connected with a spring 214. The two ends of the spring 214 are respectively fixedly connected to the anti-slip block 213 and the opposite side of the U-shaped frame 201. A connecting rod 215 is fixedly connected between the two anti-slip blocks 213 opposite to each other. A U-shaped stop block 216 is fixedly connected to the opposite sides of the two anti-slip blocks 213 located at the inner and rear sides of the U-shaped frame 201. The front surface of the U-shaped stop block 216 has two inclined surfaces 217 integrally formed.

[0038] A wedge-shaped stop block 218 is fixedly connected to the outer side wall of the laser welding gun 206;

[0039] When the device is used, welding is performed by starting the laser welding gun 206, and the reciprocating screw 204 can be controlled to rotate by starting the motor 203, and the screw sleeve 205 can be controlled to drive the laser welding gun 206 to move forward or backward, so as to perform welding. When the laser welding gun 206 moves to the rearmost, it will squeeze the pressure plate 211, drive the gas box 207 to discharge gas, and first squeeze the inclined surface 217 to make the U-shaped block 216 rise, and under the push of the spring 209, the U-shaped block 216 is blocked on the pressure plate 211, so as to limit the moved pressure plate 211;

[0040] When the laser welding gun 206 moves forward, it will approach the two anti-slip blocks 213 in front, and can control the U-shaped block 216 to rise by squeezing the two anti-slip blocks 213, so that the pressure plate 211 is pushed back by the spring 209, and the air box 207 will draw in gas at this time.

[0041] like Figure 1 , Figure 2 and Figure 5 As shown, a clamping and moving mechanism 3 is provided on both sides of the upper surface of the workbench 1;

[0042] The clamping and moving mechanism 3 includes a side plate 301, the bottom of the side plate 301 is fixedly connected to the upper surface of the workbench 1, and two through-type longitudinal grooves 302 are provided on the left side of the side plate 301. The interior of the longitudinal groove 302 is rotatably connected with a bidirectional screw 303 through a rotating shaft, and the outer wall of the bidirectional screw 303 is threadedly connected with two threaded sleeves 304, and the outer wall of the threaded sleeve 304 is fixedly connected with a rotating connection piece 1 305, and the outer wall of the rotating connection piece 1 305 is rotatably connected with a traction rod 306 through a rotating shaft, and the end of the traction rod 306 away from the rotating connection piece 1 305 is rotatably connected with a rotating connection piece 2 307 through a rotating shaft, and the end of the rotating connection piece 2 307 away from the traction rod 306 is fixedly connected to the outer wall of the moving plate 401;

[0043] A knob 308 is fixedly connected to the front end of the bidirectional screw 303 located on the upper inner side of the side plate 301;

[0044] The rear end of the bidirectional screw 303 is fixedly connected with a gear 1 309, and the rear surface of the side plate 301 is located between two gear 1s 309 facing each other up and down and is rotatably connected with a gear 2 310 through a rotating shaft, and the gear 1 309 is meshed and connected with the gear 2 310;

[0045] By turning the two knobs 308 by hand, the multiple bidirectional screws 303 can be controlled to rotate together under the meshing transmission of gear 1 309 and gear 2 310, so as to facilitate the control of the relative or opposite movement of the two rotating clamping mechanisms 4, facilitate the control of the moving distance according to different sizes of brackets for splicing, and facilitate subsequent welding work.

[0046] like Figure 1 , Figure 2 , Figure 6 and Figure 7 As shown, a rotating clamping mechanism 4 is provided on opposite sides of the two clamping and moving mechanisms 3;

[0047] The rotating clamping mechanism 4 includes a moving plate 401, a side of the moving plate 401 close to the moving welding mechanism 2 is rotatably connected to a shaft column 402 through a rotating shaft, an end of the shaft column 402 away from the moving plate 401 is fixedly connected to an L-shaped clamping plate 403, a through vertical groove 404 is provided on the right side of the L-shaped clamping plate 403, an adjusting bolt 405 is rotatably connected to the inner side of the vertical groove 404 through a rotating shaft, a lifting block 406 is threadedly connected to the outer side of the adjusting bolt 405, and an end of the lifting block 406 away from the moving plate 401 is fixedly connected to a movable clamping plate 407;

[0048] The opposite sides of the two moving plates 401 are fixedly connected with air boxes 408, the interior of the air boxes 408 is slidably connected with piston plates 409, the front surface of the piston plates 409 is fixedly connected with racks 410, and the two air boxes 408 and the air box 1 207 are fixedly connected with ventilation pipes 411;

[0049] The outer wall of the shaft column 402 is fixedly connected with a gear 3 412, and the rack 410 is meshedly connected with the gear 3 412;

[0050] Under normal conditions, the movable clamping plate 407 is at the bottom. At this time, the movable clamping plate 407 is controlled to rise by rotating the adjusting bolt 405. The bracket can be stably clamped in cooperation with the L-shaped clamping plate 403 to facilitate bracket welding. When the gas box 207 is exhausted, the gas will be filled into the inside of the gas box 2 408 through the ventilation pipe 411. At this time, the rack 410 drives the gear 3 412 to rotate, so that the L-shaped clamping plate 403 and the movable clamping plate 407 drive the bracket to flip over, which is convenient for double-sided welding.

[0051] According to another aspect of the present invention, a laser welding process for an engine bracket is provided, comprising the following steps: S1, placing the engine bracket broken into two parts between the L-shaped clamping plate 403 and the movable clamping plate 407 on both sides respectively; by rotating the adjusting bolt 405, the movable clamping plate 407 is controlled to move, and the L-shaped clamping plate 403 clamps the column bracket to complete the bracket fixing;

[0052] S2, hold the two knobs 308 and rotate them, and under the meshing transmission of gear 1 309 and gear 2 310, control the rotation of multiple bidirectional screws 303, thereby controlling the front and rear relative threaded sleeves 304 to move back to back, drive the traction rod 306 to move, and then push the moving plate 401 to move relative to each other, so that the two sections of the bracket are spliced ​​together, completing the preliminary splicing before welding;

[0053] S3, start the motor 203 to drive the reciprocating screw 204 to rotate, so that the screw sleeve 205 drives the laser welding gun 206 to move back and forth repeatedly to weld the joint;

[0054] S4. During welding, the laser welding gun 206 moves from front to back, and welds one side of the bracket first. After one side is welded, the laser welding gun 206 continues to move backward, and at this time, it squeezes the pressure plate 211, so that the air box 1 207 is inflated toward the inside of the air box 2 408, and the control rack 410 drives the gear 3 412 to rotate, so that the bracket turns over. At the same time, the pressure plate 211 squeezes the inclined surface 217 of the U-shaped block 216, so that the U-shaped block 216 rises. When the laser welding gun 206 moves to the last position, the U-shaped block 216 descends under the push of the spring 214 and abuts against the pressure plate 211. 1 The front limit is ensured to ensure the stability of the bracket after it is turned over. Then, as the motor 203 rotates, the laser welding gun 206 moves forward to weld the joint after the bracket is turned over to achieve double-sided welding. After the laser welding gun 206 moves to the front, the wedge-shaped stop block 218 will press against the bottom of the two anti-detachment blocks 213 in front, squeeze and rise, so that the U-shaped stop block 216 rises. At this time, the pressure plate 211 moves forward again under the push of the spring 1 209, and at this time, the air box 1 207 draws out the internal gas of the air box 2 408, so that the bracket is turned over in place, which is convenient for the subsequent disassembly of the bracket and the welding of another bracket to be spliced.

[0055] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A laser welding device for an engine bracket, comprising a workbench (1), characterized in that: A movable welding mechanism (2) is arranged above the outer side of the workbench (1), clamping movable mechanisms (3) are arranged on both sides of the upper surface of the workbench (1), and rotating clamping mechanisms (4) are arranged on opposite sides of the two clamping movable mechanisms (3); The mobile welding mechanism (2) comprises a U-shaped frame (201), the inner side of the U-shaped frame (201) is fixedly connected to the upper outer side of the workbench (1), the upper surface of the U-shaped frame (201) is provided with a through-type moving groove (202), a motor (203) is fixedly mounted on the front surface of the U-shaped frame (201), the rear end of the output shaft of the motor (203) is located on the inner side of the moving groove (202) and is fixedly connected to a reciprocating screw (204), a screw sleeve (205) is slidably mounted on the outer side wall of the reciprocating screw (204), and a laser welding gun (206) is fixedly connected to the bottom of the screw sleeve (205); The rotating clamping mechanism (4) comprises a movable plate (401), wherein a side of the movable plate (401) close to the movable welding mechanism (2) is rotatably connected to a shaft column (402) via a rotating shaft, an end of the shaft column (402) away from the movable plate (401) is fixedly connected to an L-shaped clamping plate (403), a through vertical groove (404) is provided on the right side of the L-shaped clamping plate (403), an adjusting bolt (405) is rotatably connected to the inner side of the vertical groove (404) via a rotating shaft, a lifting block (406) is threadedly connected to the outer side of the adjusting bolt (405), and an end of the lifting block (406) away from the movable plate (401) is fixedly connected to a movable clamping plate (407).

2. The laser welding device for an engine bracket according to claim 1, characterized in that: The rear surface of the U-shaped frame (201) is fixedly connected to an air box (207), the interior of the air box (207) is slidably connected to a piston plate (208), a plurality of springs (209) are fixedly connected between the piston plate (208) and the air box (207), the front surface of the piston plate (208) is fixedly connected to a push rod (210), the front end of the push rod (210) passes through the inner side of the U-shaped frame (201) and is fixedly connected to a pressure plate (211).

3. The laser welding device for an engine bracket according to claim 1, characterized in that: A guide column (212) is provided at the front and rear of the upper surface of the U-shaped frame (201); the bottom end of the guide column (212) penetrates the inner side of the U-shaped frame (201) and is fixedly connected to an anti-slip block (213); a second spring (214) is fixedly connected to the outer wall of the guide column (212); the two ends of the second spring (214) are respectively fixedly connected to the anti-slip block (213) and the opposite side of the U-shaped frame (201); a connecting rod (215) is fixedly connected between the two anti-slip blocks (213) opposite to each other at the front and rear; a U-shaped stop block (216) is fixedly connected to the opposite sides of the two anti-slip blocks (213) located at the inner rear of the U-shaped frame (201); and the front surface of the U-shaped stop block (216) is integrally formed with two inclined surfaces (217).

4. The laser welding device for an engine bracket according to claim 1, characterized in that: A wedge-shaped stop block (218) is fixedly connected to the outer side wall of the laser welding gun (206).

5. The laser welding device for an engine bracket according to claim 1, characterized in that: The clamping and moving mechanism (3) comprises a side plate (301), the bottom of which is fixedly connected to the upper surface of the workbench (1), and two through-type longitudinal grooves (302) are provided on the left side of the side plate (301), the interior of the longitudinal groove (302) is rotatably connected to a bidirectional screw (303) via a rotating shaft, the outer wall of the bidirectional screw (303) is threadedly connected to two threaded sleeves (304), the outer wall of the threaded sleeve (304) is fixedly connected to a rotating connection piece 1 (305), the outer wall of the rotating connection piece 1 (305) is rotatably connected to a traction rod (306) via a rotating shaft, the end of the traction rod (306) away from the rotating connection piece 1 (305) is rotatably connected to a rotating connection piece 2 (307) via a rotating shaft, and the end of the rotating connection piece 2 (307) away from the traction rod (306) is fixedly connected to the outer wall of the moving plate (401).

6. The laser welding device for an engine bracket according to claim 5, characterized in that: A knob (308) is fixedly connected to the front end of the bidirectional screw rod (303) located on the upper inner side of the side plate (301).

7. The laser welding device for an engine bracket according to claim 5, characterized in that: The rear end of the bidirectional screw (303) is fixedly connected to a gear 1 (309), and the rear surface of the side plate (301) is located between two gear 1s (309) facing each other vertically and is rotatably connected to a gear 2 (310) via a rotating shaft, and the gear 1 (309) is meshedly connected to the gear 2 (310).

8. The laser welding device for an engine bracket according to claim 2, characterized in that: The opposite sides of the two movable plates (401) are fixedly connected to air box two (408), the interior of the air box two (408) is slidably connected to piston plate two (409), the front surface of the piston plate two (409) is fixedly connected to a rack (410), and a ventilation pipe (411) is fixedly connected between the two air boxes two (408) and the air box one (207).

9. The laser welding device for an engine bracket according to claim 8, characterized in that: The outer wall of the shaft column (402) is fixedly connected with a gear three (412), and the rack (410) is meshingly connected with the gear three (412).

10. A laser welding process for an engine bracket, comprising a laser welding device for an engine bracket according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, placing the engine bracket broken into two parts between the L-shaped clamping plates (403) and the movable clamping plates (407) on both sides respectively; by rotating the adjusting bolts (405), controlling the movable clamping plates (407) to move, cooperating with the L-shaped clamping plates (403) to clamp the column bracket, and completing the bracket fixing; S2, holding two knobs (308) and rotating them, under the meshing transmission of gear 1 (309) and gear 2 (310), controlling the rotation of multiple bidirectional screws (303), thereby controlling the front and rear relative threaded sleeves (304) to move in opposite directions, driving the traction rod (306) to move, and then pushing the moving plate (401) to move relative to each other, so that the two sections of the bracket are spliced ​​together, completing the preliminary splicing before welding; S3, starting the motor (203) to drive the reciprocating screw (204) to rotate, thereby using the screw sleeve (205) to drive the laser welding gun (206) to move back and forth repeatedly to weld the joint; S4. During welding, the laser welding gun (206) moves from front to back, and first welds one side of the bracket. After one side is welded, the laser welding gun (206) continues to move backward, and at this time, it squeezes the pressure plate (211), so that the air box one (207) is inflated toward the inside of the air box two (408), and the control rack (410) drives the gear three (412) to rotate, so that the bracket turns over. At the same time, the pressure plate (211) squeezes the inclined surface (217) of the U-shaped block (216), so that the U-shaped block (216) rises. When the laser welding gun (206) moves to the end, under the push of the spring two (214), the U-shaped block (216) descends and presses against the pressure plate. The plate (211) is limited in front to ensure the stability of the bracket after it is turned over. Then, as the motor (203) rotates, the laser welding gun (206) moves forward to weld the joint after the bracket is turned over to achieve double-sided welding. After the laser welding gun (206) moves to the front, the wedge-shaped stop block (218) will press against the bottom of the two anti-detachment blocks (213) in the front, squeeze and rise, so that the U-shaped stop block (216) rises. At this time, the pressure plate (211) moves forward again under the push of spring 1 (209), and at this time, the air box 1 (207) draws out the internal gas of air box 2 (408), so that the bracket is turned over in place, which is convenient for subsequent disassembly of the bracket and welding of another bracket to be spliced.

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