Laser welding device for engine support

Abstract

The invention discloses an engine support laser welding device, and belongs to the field of welding devices.The device comprises a welding frame, a first clamping assembly used for fixing an engine support body is installed on the welding frame, and a plurality of second clamping assemblies used for fixing engine support accessories are installed on the side, opposite to the first clamping assembly, of the welding frame; adjusting frames are installed on the multiple second clamping assemblies, adjusting rods are slidably connected to the ends, making contact with the first clamping assemblies, of the adjusting frames, and the angles of the adjusting frames can be changed when the adjusting rods slide, so that the second clamping assemblies incline to apply reversible deformation to the engine support accessory; when the first clamping assembly rotates reversely, the second clamping assembly can be driven to rotate reversely synchronously, and after the second clamping assembly is turned over, the adjusting rod slides so as to remove reverse deformation applied to the engine support accessory. The device can apply a reversible deformation angle to a workpiece during welding, and during double-side welding, the reversible deformation amount during second-side welding is relieved.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, specifically to a laser welding device for engine brackets. Background Technology

[0002] As a core load-bearing component of a vehicle's powertrain, the engine mount is fixedly connected to the engine on one end and to the engine mount on the vehicle body on the other. Its welding quality directly determines the engine's installation stability, operational safety, and the overall vehicle's ride comfort. Therefore, extremely high requirements are placed on welding precision, weld strength, and workpiece forming consistency. Currently, laser welding technology, due to its advantages of concentrated energy density, small heat-affected zone, aesthetically pleasing weld formation, and high strength, has been widely used in the welding production of engine mounts, gradually replacing traditional welding processes and becoming the mainstream technology.

[0003] Existing engine mounts are mostly assembled and welded from a main body and multiple components (such as mounting lugs and reinforcing plates). During welding, the main body and each component must be precisely positioned and clamped before welding is completed at each joint. However, in terms of welding deformation control, localized high-temperature heating during laser welding can lead to uneven thermal expansion and contraction of the material, creating thermal stress differences. This can cause problems such as angular deformation and warping of the engine mount components, which is one of the key bottlenecks restricting welding quality. In existing technologies, some devices lack effective anti-deformation control structures, relying solely on post-weld heat treatment to compensate for deformation defects. This not only requires high worker skill levels and has a long correction cycle but also easily results in excessive flatness, increasing production costs and rework rates. Other devices, while capable of applying anti-deformation, suffer from low precision and poor flexibility in adjusting the amount of anti-deformation. They cannot accurately adjust the anti-deformation parameters according to the structural characteristics of different types of components and are difficult to adapt to the welding requirements of different specifications of components. Furthermore, residual anti-deformation results in uneven weld surfaces, affecting subsequent assembly accuracy. Summary of the Invention

[0004] The purpose of this invention is to provide a laser welding device for engine brackets, which solves the problem of poor control of welding thermal deformation in existing welding devices.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an engine bracket laser welding device, comprising a welding frame, wherein the welding frame is equipped with a first clamping component for fixing the main body of the engine bracket, and a plurality of second clamping components for fixing engine bracket accessories are installed on the opposite side of the first clamping component on the welding frame. The second clamping assembly includes a cylindrical cam, and a plurality of the second clamping assemblies revolve around the cylindrical cam in a circular array. When the plurality of the second clamping assemblies revolve, the accessories of the plurality of engine mounts can be sequentially aligned with the engine mount body. Each of the second clamping assemblies is equipped with an adjustment frame, and an adjustment rod is slidably connected to one end of the adjustment frame that contacts the first clamping assembly. When the adjustment rod slides, it can change the angle of the adjustment frame, thereby tilting the second clamping assembly to apply a counter-deformation to the engine mount accessory. When the first clamping component reverses, it can drive the second clamping component to reverse synchronously, and after the second clamping component flips, the adjusting rod slides to remove the anti-deformation applied to the engine mount accessory.

[0006] Preferably, the first clamping assembly includes a first rotating shaft, a first clamping seat is fixedly connected to the end of the first rotating shaft, two first clamping arms are symmetrically slidably connected to the first clamping seat, a first electric rotating block is rotatably connected to each of the two first clamping arms, and a mold groove for cooperating with the engine bracket is opened on each of the two first electric rotating blocks.

[0007] Preferably, the second clamping assembly further includes a rotating ring, on which a plurality of sliding arms are inserted. Each of the plurality of sliding arms is provided with a protrusion. The outer wall of the cylindrical cam is provided with a sliding groove, and the protrusion is slidably connected in the sliding groove. Thus, when the rotating ring rotates, the sliding arms can revolve around the cylindrical cam and slide axially.

[0008] Preferably, the end of the sliding arm is rotatably connected to a second clamping seat, and two second clamping arms are symmetrically slidably connected to the second clamping seat. Each of the two second clamping arms is fixedly connected to a clamping block, and the clamping block is provided with a mold groove that mates with the engine bracket accessories.

[0009] Preferably, a passive cylinder is fixedly connected to the adjusting frame, and a mounting plate is fixedly connected to the output end of the passive cylinder. Multiple adjusting rods are fixedly connected to the mounting plate, and the extension and retraction of the passive cylinder can adjust the length of the multiple adjusting rods extending out of the adjusting frame.

[0010] Preferably, a rotating rod is fixedly connected to the second clamp, the rotating rod is rotatably connected to the sliding arm, a limiting plate is fixedly connected to the middle part of the rotating rod, a rotating plate is rotatably connected to the end of the rotating rod, and a torsion spring is connected between the limiting plate and the rotating plate; An arc-shaped active cylinder is fixedly connected inside the sliding arm. The cylinder rod of the arc-shaped active cylinder is fixedly connected to the rotating plate. An air pipe connects the arc-shaped active cylinder and the passive cylinder. When the rotating rod rotates, it can be transmitted to the rotating plate through a torsion spring, thereby shortening the arc-shaped active cylinder and extending the passive cylinder so that the adjusting rod retracts into the adjusting bracket, thereby removing the counter-deformation applied to the engine mount accessories.

[0011] Preferably, a toothed gear is rotatably connected to the welding frame, and the rotating ring is provided with meshing teeth that engage with the toothed gear. When the toothed gear disengages from the rotating ring, the engine bracket accessory on the second clamping assembly is aligned with the welding position of the engine bracket body.

[0012] Preferably, the cylindrical cam is axially slidably connected to the welding frame. After the engine bracket accessory is welded to the engine bracket body, the two second clamping arms move away from each other, and the cylindrical cam slides linearly, thereby moving the clamping block away from the welded engine bracket accessory.

[0013] Preferably, the end face of the toothed gear is provided with multiple protrusions corresponding to multiple tooth missing positions, an active hydraulic rod is fixedly connected to the welding frame, a circular plate is fixedly connected to the end of the cylindrical cam, a passive hydraulic rod is connected between the circular plate and the welding frame, and an oil pipe is connected between the passive hydraulic rod and the active hydraulic rod. When the toothed gear rotates and the protrusion contacts and pushes the active hydraulic rod to shorten, the rotating ring does not rotate. At the same time, the passive hydraulic rod extends and pushes the second clamping assembly away from the engine bracket accessory. When the protrusion is no longer in contact with the active hydraulic rod, the active hydraulic rod extends and resets.

[0014] Preferably, the number of passive hydraulic rods is three, and the three passive hydraulic rods are arranged in a circular array on the circular plate.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: In the welding process, this invention pre-adjusts the anti-deformation amount according to the type of accessory. Specifically, by adjusting the extension of the adjusting rod on the adjusting frame of the corresponding second clamping assembly, when the accessory on the second clamping assembly is aligned with the main body on the first clamping assembly, the end of the adjusting frame that contacts the first clamping assembly is blocked and swings a slight angle around the second clamping assembly. The formation of this angle applies anti-deformation to the subsequent welding, ensuring the stability of the workpiece during the welding process and avoiding welding quality problems caused by thermal deformation. In addition, by precisely controlling the displacement of the adjusting rod, it can adapt to engine bracket accessories of different specifications and shapes, improving the versatility and flexibility of the equipment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the clamping component of the present invention; Figure 3 This is a schematic diagram of the structure of the first clamping component of the present invention; Figure 4This is a schematic diagram of the structure of the second clamping component of the present invention; Figure 5 This is a schematic diagram of the structure of the adjustment frame of the present invention; Figure 6 This is a schematic diagram of the structure at the rotating part of the present invention; Figure 7 This is a schematic diagram of the cylindrical cam structure of the present invention; Figure 8 This is a schematic diagram of the structure of the protrusion in this invention.

[0017] In the diagram: 100, welding frame; 110, first rotating shaft; 120, first clamping seat; 130, first clamping arm; 140, first electric rotating block; 200, cylindrical cam; 201, slide groove; 210, rotating ring; 220, sliding arm; 221, protrusion; 230, second clamping seat; 240, second clamping arm; 250, clamping block; 300, adjusting frame; 310, mounting plate; 320, passive cylinder; 330, adjusting rod; 340, rotating rod; 350, limiting plate; 360, torsion spring; 370, rotating plate; 380, arc-shaped active cylinder; 390, air pipe; 400, toothed gear; 410, protrusion; 420, active hydraulic rod; 430, circular plate; 440, passive hydraulic rod; 450, oil pipe. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Reference Figures 1-8This embodiment provides a technical solution: an engine mount laser welding device, including a welding frame 100, on which a first clamping component for fixing the engine mount body is mounted, and on the opposite side of the first clamping component on the welding frame 100, a plurality of second clamping components for fixing engine mount accessories are mounted; the second clamping components include a cylindrical cam 200, and the plurality of second clamping components revolve in a circular array around the cylindrical cam 200, so that the accessories of the plurality of engine mounts can be sequentially aligned with the engine mount body when the plurality of second clamping components revolve; each of the plurality of second clamping components is mounted with an adjusting frame 300, and an adjusting rod 330 is slidably connected to one end of the adjusting frame 300 that contacts the first clamping component, so that the adjusting rod 330 can change the angle of the adjusting frame 300 when it slides, thereby tilting the second clamping component to apply a reverse deformation to the engine mount accessory; when the first clamping component reverses, it can drive the second clamping component to reverse synchronously, and after the second clamping component is flipped, the adjusting rod 330 slides to remove the reverse deformation applied to the engine mount accessory.

[0020] During the welding of the engine bracket, a robotic arm grasps the main body of the engine bracket to be welded, as well as engine bracket accessories (such as mounting ears, reinforcing plates, etc.). The robotic arm delivers the main body and accessories to the first clamping assembly and the second clamping assembly, respectively. The two clamping assemblies firmly clamp the main body and accessories. Then, multiple second clamping assemblies revolve around the cylindrical cam 200, so that multiple accessories come into contact with the main body in sequence and are spliced ​​together. Then, the laser welding head on the welding frame 100 (not shown in the figure) welds the main body and accessories together. After the first side is welded, the first clamping assembly drives the second clamping assembly to rotate synchronously to perform welding on the next side. During the welding process, the anti-deformation amount is pre-adjusted according to the type of accessory. Specifically, by adjusting the extension amount of the adjusting rod 330 on the adjusting frame 300 of the corresponding second clamping assembly, when the accessory on the second clamping assembly is aligned with the main body on the first clamping assembly, the end of the adjusting frame 300 that contacts the first clamping assembly is blocked and swings a small angle around the second clamping assembly as the center. The formation of this angle applies anti-deformation amount to the subsequent welding, ensuring the stability of the workpiece during the welding process and avoiding welding quality problems caused by thermal deformation. In addition, by precisely controlling the displacement of the adjusting rod 330, it can adapt to engine bracket accessories of different specifications and shapes, improving the versatility and flexibility of the equipment. After one side is welded, the other side no longer needs to be subjected to anti-deformation. After the first clamping component drives the second clamping component to rotate 180 degrees, multiple adjusting rods 330 retract, removing the tilting force applied to the second clamping component. This setting ensures the uniformity of the force on the workpiece during the welding process, and also avoids the problem of uneven welding surface caused by residual anti-deformation.

[0021] The first clamping assembly includes a first rotating shaft 110, with a first clamping seat 120 fixedly connected to the end of the first rotating shaft 110. Two first clamping arms 130 are symmetrically slidably connected to the first clamping seat 120. A first electric rotating block 140 is rotatably connected to each of the two first clamping arms 130. Each of the two first electric rotating blocks 140 has a groove for cooperating with the engine bracket.

[0022] The two first clamping arms 130 are adjusted in position by sliding to accommodate engine bracket bodies of different sizes. The rotation of the first electric rotating block 140 further enhances the clamping flexibility, allowing the engine bracket body to be rotated, thereby enabling the welding of accessories at each edge. The design of the mold groove matches the shape of the engine bracket, ensuring that the workpiece surface is not damaged during clamping, and also preventing the workpiece from shifting during welding. The rotation of the first rotating shaft 110 drives the entire first clamping assembly to flip, so that the other side of the body can also be welded.

[0023] The second clamping assembly also includes a rotating ring 210, on which multiple sliding arms 220 are inserted. Each sliding arm 220 has a protrusion 221. The outer wall of the cylindrical cam 200 has a groove 201. The protrusion 221 is slidably connected to the groove 201. Thus, when the rotating ring 210 rotates, the sliding arms 220 can revolve and slide axially on the cylindrical cam 200.

[0024] When the rotating ring 210 rotates, it can drive multiple sliding arms 220 to revolve around the cylindrical cam 200. The sliding arms 220 are linearly slidingly connected to the rotating ring 210, so that when the rotating ring 210 rotates, it can drive the protrusions 221 on the multiple sliding arms 220 to slide within the grooves 201 on the outer wall of the cylindrical cam 200. The grooves 201 are inclined on the radial projection of the cylindrical cam 200. When the protrusions 221 slide within the cylindrical cam 200, the sliding arms 220 can slide linearly relative to the cylindrical cam 200, and the cylindrical cam 200 will not rotate. When the protrusions 221 slide in the grooves 201, so that the sliding stroke of the sliding arm 220 is the largest and furthest from the inner wall of the welding frame 100, the corresponding accessory at the end of the sliding arm 220 contacts the engine bracket body. Subsequently, if the protrusions 221 slide relative to the grooves 201 again, the sliding arm 220 begins to move away from the first clamping assembly. Through the above settings, multiple accessories can sequentially contact and weld onto the engine bracket body.

[0025] The end of the sliding arm 220 is rotatably connected to a second clamping seat 230. Two second clamping arms 240 are symmetrically slidably connected to the second clamping seat 230. Each of the two second clamping arms 240 is fixedly connected to a clamping block 250. The clamping block 250 is provided with a mold groove that mates with the engine bracket accessories.

[0026] The two second clamping arms 240 are adjusted in position by sliding to accommodate engine bracket parts of different sizes. The mold groove on the clamping block 250 matches the shape of the part to ensure that the surface of the part is not damaged during clamping and to prevent the part from shifting during welding. The rotating connection design of the second clamping seat 230 allows the clamping assembly to be flexibly adjusted in angle for easy double-sided welding.

[0027] A passive cylinder 320 is fixedly connected to the adjusting frame 300. The output end of the passive cylinder 320 is fixedly connected to the mounting plate 310. Multiple adjusting rods 330 are fixedly connected to the mounting plate 310. The extension and retraction of the passive cylinder 320 can adjust the length of the multiple adjusting rods 330 extending out of the adjusting frame 300.

[0028] When the passive cylinder 320 extends, it can drive the mounting plate 310 to move upward, thereby shortening the length of the adjusting rod 330 protruding from the adjusting bracket 300. At this time, the amount of anti-deformation applied during welding is reduced. The extension and retraction of the passive cylinder 320 is adjusted in advance by a separate interface and driving force, so that the protrusion of the adjusting rod 330 can match the amount of anti-deformation required for the accessory held by the second clamping assembly.

[0029] A rotating rod 340 is fixedly connected to the second clamp 230. The rotating rod 340 is rotatably connected to the sliding arm 220. A limiting plate 350 is fixedly connected to the middle of the rotating rod 340, and a rotating plate 370 is rotatably connected to the end. A torsion spring 360 is connected between the limiting plate 350 and the rotating plate 370. An arc-shaped active cylinder 380 is fixedly connected inside the sliding arm 220. The cylinder rod of the arc-shaped active cylinder 380 is fixedly connected to the rotating plate 370. An air pipe 390 connects the arc-shaped active cylinder 380 and the passive cylinder 320. When the rotating rod 340 rotates, it can be transmitted to the rotating plate 370 through the torsion spring 360, thereby shortening the arc-shaped active cylinder 380 and extending the passive cylinder 320 so that the adjusting rod 330 retracts into the adjusting bracket 300, thereby removing the anti-deformation applied to the engine mount accessories.

[0030] After the first side welding is completed, the first clamping seat 120 of the first clamping assembly drives the second clamping seat 230 to rotate synchronously through contact with the adjusting frame 300. At this time, the engine bracket body and accessories can be flipped synchronously to perform welding on the reverse side. During the flipping process of the second clamping seat 230, the limiting plate 350 drives the rotating plate 370 to rotate through the torsion spring 360. At this time, the rotating plate 370 drives the arc-shaped active cylinder 380 to shorten. Then, the gas in the arc-shaped active cylinder 380 is transferred to the passive cylinder 320, causing the passive cylinder 320 to extend. At this time, the adjusting rod 330 retracts the adjusting frame 300, thereby removing the application of the anti-deformation amount. If the arc-shaped active cylinder 380 is not fully shortened when the passive cylinder 320 is fully extended, then the arc-shaped active cylinder 380 will no longer shorten, the limit plate 350 will rotate relative to the rotating plate 370, and the torsion spring 360 will be subjected to torque, thereby preventing the flipping of the two clamping components from being interfered with. In addition, in order to improve the contact force between the first clamp 120 and the adjusting frame 300 and ensure that the first clamping component can better drive the second clamping component to rotate, the adjusting frame 300 and the first clamp 120 can be set to magnetic attraction to ensure the stability of the transmission force.

[0031] A toothed gear 400 is rotatably connected to the welding frame 100. The rotating ring 210 is provided with meshing teeth that engage with the toothed gear 400. When the toothed gear 400 disengages from the rotating ring 210, the engine bracket accessory on the second clamping assembly is aligned with the welding position of the engine bracket body.

[0032] When the toothed gear 400 rotates, it can drive the rotating ring 210 to rotate intermittently. When the rotating ring 210 is not meshed with the toothed gear 400, the toothed gear 400 drives the cylindrical cam 200 to slide axially, so that the second clamping assembly releases the welded parts, thereby ensuring that the subsequent rotation of the rotating ring 210 is not interfered with.

[0033] The cylindrical cam 200 is axially slidably connected to the welding frame 100. After the engine bracket accessories are welded to the engine bracket body, the two second clamping arms 240 move away from each other, and the cylindrical cam 200 slides in a straight line, so that the clamping block 250 moves away from the welded engine bracket accessories.

[0034] After the main body and the accessory are welded on both sides by the system settings, the two second clamping arms 240 move away from each other and release the clamping of the accessory. It should be noted that the first clamping arm 130 and the second clamping arm 240 are both electrically controlled. After the clamping of the part is released, the cylindrical cam 200 slides linearly, causing the clamping block 250 to move away from the part. The toothed gear 400 continues to rotate and can continue to mesh with the rotating ring 210, thereby driving the sliding arm 220 and the second clamping seat 230 away from the first clamping assembly. At this time, the adjusting bracket 300 moves away from the first clamping seat 120 from the lower part, so as not to cause interference in movement. Furthermore, when the adjusting bracket 300 moves away from the first clamping seat 120, the torsion spring 360 returns, so that the lengths of the arc-shaped active cylinder 380 and the passive cylinder 320 are restored, and the rotation angle of the rotating rod 340 is also restored, thus preparing for the welding of the next engine part.

[0035] The end face of the toothed gear 400 is provided with multiple protrusions 410 corresponding to multiple tooth missing positions. An active hydraulic rod 420 is fixedly connected to the welding frame 100. A circular plate 430 is fixedly connected to the end of the cylindrical cam 200. A passive hydraulic rod 440 is connected between the circular plate 430 and the welding frame 100. An oil pipe 450 is connected between the passive hydraulic rod 440 and the active hydraulic rod 420. When the toothed gear 400 rotates and the protrusions 410 contact and push the active hydraulic rod 420 to shorten, the rotating ring 210 does not rotate. At the same time, the passive hydraulic rod 440 extends and pushes the second clamping assembly away from the engine bracket accessory. When the protrusions 410 do not contact the active hydraulic rod 420, the active hydraulic rod 420 extends and resets.

[0036] The drive structure between the missing tooth gear 400 and the rotating ring 210 can also be replaced with the structure of the Geneva drive, while the rest can remain unchanged; When the toothed gear 400 is not driving the rotating ring 210 to rotate, the protrusion 410 is in the state of just contacting the active hydraulic rod 420. The toothed gear 400 is driven by an external servo motor. After both sides of the part are welded to the main body, the external servo motor continues to drive the toothed gear 400 to rotate. At this time, the protrusion 410 squeezes the active hydraulic rod 420 to shorten it, so that the hydraulic oil in the active hydraulic rod 420 is transferred to the passive hydraulic rod 440. At this time, the passive hydraulic rod 440 extends and drives the cylindrical cam 200 to move away from the first clamping assembly, thereby releasing the clamping of the part. Then the toothed gear 400 continues to rotate. At this time, the toothed gear 400 can mesh with the rotating ring 210 again, so that the rotating ring 210 is driven to rotate, so that the second clamping arm 240 can move away from the welded engine bracket. A spring can be installed inside or outside the active hydraulic rod 420 to assist its extension and return, so that when the protrusion 410 is not in contact with the active hydraulic rod 420, the active hydraulic rod 420 resets, and at the same time the cylindrical cam 200 resets, ensuring that subsequent parts can continue to be transported close to the engine bracket body. After the second clamping arm 240 moves away from the welded engine bracket, the robotic arm feeds the part to it again, and the second clamping assembly clamps the part again for further welding.

[0037] There are three passive hydraulic rods 440, and the three passive hydraulic rods 440 are arranged in a ring array on the circular plate 430.

[0038] By setting three passive hydraulic rods 440, the driving force on the cylindrical cam 200 can be balanced when it slides. In addition, a flow divider valve is set at the connection line between the active hydraulic rod 420 and the three passive hydraulic rods 440 to ensure that the three passive hydraulic rods 440 extend and retract at equal distances.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A laser welding device for engine brackets, characterized in that: The assembly includes a welding frame (100) on which a first clamping assembly for fixing an engine mount body is mounted, and a plurality of second clamping assemblies for fixing engine mount accessories are mounted on the opposite side of the first clamping assembly on the welding frame (100). The second clamping assembly includes a cylindrical cam (200), and a plurality of the second clamping assemblies revolve in a circular array around the cylindrical cam (200). When the plurality of the second clamping assemblies revolve, the accessories of the plurality of engine mounts can be sequentially aligned with the engine mount body. Each of the second clamping assemblies is equipped with an adjustment bracket (300), and an adjustment rod (330) is slidably connected to one end of the adjustment bracket (300) that contacts the first clamping assembly. When the adjustment rod (330) slides, it can change the angle of the adjustment bracket (300), thereby tilting the second clamping assembly to apply a counter-deformation to the engine mount accessory. When the first clamping component reverses, it can drive the second clamping component to reverse synchronously, and after the second clamping component flips, the adjusting rod (330) slides to remove the anti-deformation applied to the engine mount accessory.

2. The engine bracket laser welding device according to claim 1, characterized in that: The first clamping assembly includes a first rotating shaft (110), and a first clamping seat (120) is fixedly connected to the end of the first rotating shaft (110). Two first clamping arms (130) are symmetrically slidably connected to the first clamping seat (120). A first electric rotating block (140) is rotatably connected to each of the two first clamping arms (130). Each of the two first electric rotating blocks (140) is provided with a mold groove that cooperates with the engine bracket.

3. The engine bracket laser welding device according to claim 1, characterized in that: The second clamping assembly also includes a rotating ring (210), on which a plurality of sliding arms (220) are inserted. Each of the sliding arms (220) is provided with a protrusion (221). The outer wall of the cylindrical cam (200) is provided with a groove (201). The protrusion (221) is slidably connected in the groove (201). Thus, when the rotating ring (210) rotates, the sliding arm (220) can revolve and slide axially on the cylindrical cam (200).

4. The engine bracket laser welding device according to claim 3, characterized in that: The end of the sliding arm (220) is rotatably connected to a second clamping seat (230), and two second clamping arms (240) are symmetrically slidably connected on the second clamping seat (230). Each of the two second clamping arms (240) is fixedly connected to a clamping block (250), and the clamping block (250) is provided with a mold groove that cooperates with the engine bracket accessories.

5. The engine bracket laser welding device according to claim 4, characterized in that: A passive cylinder (320) is fixedly connected to the adjustment frame (300). The output end of the passive cylinder (320) is fixedly connected to the mounting plate (310). Multiple adjustment rods (330) are fixedly connected to the mounting plate (310). The extension and retraction of the passive cylinder (320) can adjust the length of the multiple adjustment rods (330) extending out of the adjustment frame (300).

6. The engine bracket laser welding apparatus according to claim 5, characterized in that: A rotating rod (340) is fixedly connected to the second clamp (230). The rotating rod (340) is rotatably connected to the sliding arm (220). A limiting plate (350) is fixedly connected to the middle part of the rotating rod (340), and a rotating plate (370) is rotatably connected to the end. A torsion spring (360) is connected between the limiting plate (350) and the rotating plate (370). An arc-shaped active cylinder (380) is fixedly connected inside the sliding arm (220). The cylinder rod of the arc-shaped active cylinder (380) is fixedly connected to the rotating plate (370). An air pipe (390) connects the arc-shaped active cylinder (380) and the passive cylinder (320). When the rotating rod (340) rotates, it can be transmitted to the rotating plate (370) through the torsion spring (360), thereby shortening the arc-shaped active cylinder (380) and extending the passive cylinder (320) so that the adjusting rod (330) retracts into the adjusting bracket (300), thereby removing the anti-deformation applied to the engine mount accessories.

7. The engine bracket laser welding apparatus according to claim 4, characterized in that: A toothed gear (400) is rotatably connected to the welding frame (100), and the rotating ring (210) is provided with meshing teeth with the toothed gear (400). When the toothed gear (400) disengages from the rotating ring (210), the engine bracket accessory on the second clamping assembly is aligned with the welding position of the engine bracket body.

8. The engine bracket laser welding apparatus according to claim 7, characterized in that: The cylindrical cam (200) is axially slidably connected to the welding frame (100). After the engine bracket accessory is welded to the engine bracket body, the two second clamping arms (240) move away from each other, and the cylindrical cam (200) slides in a straight line, so that the clamping block (250) moves away from the welded engine bracket accessory.

9. The engine bracket laser welding apparatus according to claim 8, characterized in that: The end face of the toothed gear (400) is provided with a plurality of protrusions (410) corresponding to a plurality of toothed positions. An active hydraulic rod (420) is fixedly connected to the welding frame (100). A circular plate (430) is fixedly connected to the end of the cylindrical cam (200). A passive hydraulic rod (440) is connected between the circular plate (430) and the welding frame (100). An oil pipe (450) is connected between the passive hydraulic rod (440) and the active hydraulic rod (420). When the missing tooth gear (400) rotates and the protrusion (410) contacts and pushes the active hydraulic rod (420) to shorten, the swivel (210) does not rotate. At the same time, the passive hydraulic rod (440) extends and pushes the second clamping assembly away from the engine bracket accessory. When the protrusion (410) is not in contact with the active hydraulic rod (420), the active hydraulic rod (420) extends and resets.

10. The engine bracket laser welding apparatus according to claim 9, characterized in that: The number of passive hydraulic rods (440) is three, and the three passive hydraulic rods (440) are arranged in a ring array on the circular plate (430).

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