Auxiliary positioning welding device for magnesium alloy skylight framework

Abstract

The invention relates to the technical field of magnesium alloy skylight framework machining, in particular to a magnesium alloy skylight framework auxiliary positioning welding device which comprises a welding platform, a welding structure is slidably arranged at the top of the welding platform, and skylight cross beam fixing seats are connected to the front side and the rear side of the top of the welding platform in a bolted mode. Skylight longitudinal beam fixing seats are connected to the two sides between the two skylight cross beam fixing seats in a bolted mode, and auxiliary positioning structures are arranged in the skylight cross beam fixing seats and the skylight longitudinal beam fixing seats. The auxiliary positioning structure comprises a top end fixing assembly, the top end fixing assembly is connected to the top of the skylight cross beam fixing base and the top of the skylight longitudinal beam fixing base in a bolted mode, and a plurality of bottom end supporting assemblies are arranged in the skylight cross beam fixing base and the skylight longitudinal beam fixing base in the length direction in a sliding mode. The auxiliary positioning and welding device for the magnesium alloy skylight framework has the beneficial effects that precise positioning and stable clamping functions are achieved, and the welding quality of the magnesium alloy skylight framework is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of magnesium alloy sunroof frame processing technology, specifically to an auxiliary positioning and welding device for magnesium alloy sunroof frames. Background Technology

[0002] As we all know, the manufacturing precision of the car sunroof frame, as an important structural and functional component of the car body, directly affects the sunroof's sealing performance, noise control, and overall appearance quality. With the increasing urgency of the demand for lightweight vehicles, magnesium alloys, due to their advantages such as low density, high specific strength, and good damping and shock absorption performance, have gradually become the ideal material for sunroof frames.

[0003] In the automotive manufacturing industry, magnesium alloy sunroof frames are mostly welded from crossbeams and longitudinal beams. However, existing magnesium alloy sunroof frame welding devices suffer from insufficient positioning accuracy. Traditional positioning devices often use a single clamping point or simple fixtures for fixing, which is difficult to adapt to the complex splicing structure of crossbeams and longitudinal beams. This can easily lead to positioning offset, resulting in misalignment of the welded joints and affecting the welding strength and appearance quality. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an auxiliary positioning and welding device for magnesium alloy sunroof frames, which has the advantages of precise positioning and stable clamping functions, ensuring the welding quality of magnesium alloy sunroof frames.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution: an auxiliary positioning welding device for a magnesium alloy sunroof frame, comprising a welding platform, a welding structure slidably disposed on the top of the welding platform, sunroof crossbeam fixing seats bolted to the front and rear sides of the top of the welding platform, sunroof longitudinal beam fixing seats bolted to both sides between the two sunroof crossbeam fixing seats, and an auxiliary positioning structure disposed inside the sunroof crossbeam fixing seats and the sunroof longitudinal beam fixing seats. The auxiliary positioning structure includes a top fixing component, which is bolted to the top of the sunroof crossbeam fixing seat and the sunroof longitudinal beam fixing seat respectively. Several bottom support components are slidably arranged inside the sunroof crossbeam fixing seat and the sunroof longitudinal beam fixing seat along the length direction. A rigid fixing component is snapped onto the surface of the bottom support component, and the other end of the rigid fixing component is located on the outside of the sunroof crossbeam fixing seat and the sunroof longitudinal beam fixing seat respectively and is slidably arranged with a pressure post. A follower plate is welded to the top of the pressure post, and the other end of the follower plate is fixedly connected to the top fixing component.

[0006] By adopting the above technical solution and setting up an auxiliary positioning structure, during the operation, the array-distributed bottom support components first adaptively conform to the outline of the frame with extremely low pressure, precisely conforming to the three-dimensional shape of the sunroof frame's horizontal and vertical beams, achieving stress-free initial positioning. Then, the top fixing components provide flexible clamping force from above, forming flexible constraints on the sunroof frame's horizontal and vertical beams in the vertical direction. When the top fixing components are in close contact with the frame, they will drive the pressure column to move through the follower plate, causing the pressure column to drive the rigid fixing component to move, so that the rigid fixing component rigidly locks the position of the bottom support components. This can transform all adaptive bottom support units into rigid pillars, providing a stable foundation for welding, thereby improving the splicing and welding accuracy of the frame, effectively avoiding joint misalignment caused by positioning offset, and ensuring the welding strength of the sunroof frame.

[0007] The present invention is further configured such that: the top fixing assembly includes an upper mounting plate, a fixing plate is bolted to the bottom of the upper mounting plate, and a rubber plate is provided at the bottom of the fixing plate; a corrugated plate surrounds the rubber plate and the fixing plate; the corrugated plate, the fixing plate and the rubber plate surround an expansion cavity; a plurality of telescopic rods are fixedly connected to the top of the rubber plate along the length direction, and the top of the telescopic rods is fixedly connected to the fixing plate; a return spring is sleeved on the surface of the telescopic rod, and the two ends of the return spring are respectively connected to the fixing plate and the rubber plate.

[0008] By adopting the above technical solution, after the frame is placed, gas (such as compressed air) is introduced into the expansion cavity through the top fixing component. This causes the corrugated plate to extend and push the rubber plate downward to generate uniform pressure. At the same time, the telescopic rod and the return spring are stretched, and the pressure is applied to the sunroof frame through the rubber plate. This, together with the bottom support component, forms a flexible constraint on the vertical direction of the sunroof frame's crossbeams and longitudinal beams. Furthermore, the flexible pressure surface formed by the rubber plate and the corrugated plate can uniformly adapt to the slight undulations of the frame surface, avoiding excessive local pressure that could cause workpiece deformation. It also adapts to the shape of the frame surface and provides good positioning pressure.

[0009] The present invention is further configured such that: the top of the sunroof horizontal beam fixing seat and the sunroof vertical beam fixing seat are slidably connected to a connecting plate, and the connection between the connecting plate and the sunroof horizontal beam fixing seat and the sunroof vertical beam fixing seat is fixed by bolts, and the top of the connecting plate is bolted to the upper mounting plate.

[0010] By adopting the above technical solution and through the sliding installation design of the connecting plate, the top fixing component can be flexibly disassembled and assembled with the skylight crossbeam fixing seat and the skylight longitudinal beam fixing seat, further improving the versatility of the device.

[0011] The present invention is further configured such that: the bottom support assembly includes a pin, the pin being slidably disposed inside the sunroof crossbeam fixing seat and the sunroof longitudinal beam fixing seat respectively; a magnetic plate is bolted to the bottom of the pin; a positioning plate is disposed at the bottom of the magnetic plate; an electromagnet is bolted to the top of the positioning plate, and the electromagnet works in conjunction with the magnetic plate; a guide post is slidably passed through the interior of the magnetic plate, and the bottom of the guide post is bolted to the positioning plate; a first return spring is sleeved on the surface of the guide post, and the two ends of the first return spring are respectively connected to the magnetic plate and the positioning plate.

[0012] By adopting the above technical solution, by setting a bottom support component, when the frame is placed on the support surface formed by several pins, the pins move downward under the weight of the frame, pushing the magnetic plate to slide along the guide post surface and compress the first return spring. This allows the pins to adaptively conform to the frame contour and precisely conform to the three-dimensional shape of the sunroof frame's crossbeams and longitudinal beams. Furthermore, by utilizing the elastic force of the first return spring and the magnetic field generated by the electromagnet, a repulsive force opposite to that of the magnetic plate can be generated, thereby making the pins in close contact with the frame surface and achieving the effect of supporting and positioning the bottom of the frame.

[0013] The present invention is further configured such that: the ejector pins are respectively arranged along the length direction of the skylight crossbeam fixing seat and the skylight longitudinal beam fixing seat, and the skylight crossbeam fixing seat and the skylight longitudinal beam fixing seat are both provided with guide holes for use with the ejector pins.

[0014] By adopting the above technical solution, multiple ejector pins are arranged along the length of the fixed base. Their sliding stroke is limited by the accuracy and length of the guide hole. During the operation, each ejector pin makes a strict vertical movement under the constraint of the guide hole, ensuring the accuracy of the support direction and preventing deviation.

[0015] The invention is further configured such that: the rigid fixing assembly includes a fixing base located in the middle of two adjacent ejector pins, and the top of the fixing base is bolted to the inner wall of the sunroof crossbeam fixing base and the sunroof longitudinal beam fixing base respectively; the inner side of the sunroof crossbeam fixing base and the sunroof longitudinal beam fixing base are slidably provided with movable seats; the movable seats and the side of the fixing base near the ejector pins are in close contact with them; a movable plate is welded to the side of the movable seat away from the fixing base; and a driven wedge block is welded to the other end of the movable plate; the other end of the driven wedge block contacts an active wedge block; a push rod is welded to the bottom of the active wedge block; and a hollow tube is slidably sleeved on the bottom end of the push rod; the other end of the hollow tube is used in conjunction with a pressure column.

[0016] By adopting the above technical solution, a rigid fixing component is set up. When the top fixing component is in close contact with the skeleton, the follower plate drives the pressure column to move, causing the pressure column to squeeze the compressed air inside the hollow tube. As the volume of the hollow tube is compressed, the compressed air can push the push rod upward and simultaneously drive the active wedge block to move. Due to the interaction between the inclined surfaces of the active wedge block and the driven wedge block, the vertical movement of the active wedge block is converted into the horizontal movement of the driven wedge block. The driven wedge block drives the moving seat to move horizontally towards the fixed base through the moving plate, so that the moving seat and the fixing slot on the fixed base clamp all the ejector pins located therebetween from both sides, realizing the rigid fixing of the ejector pins, providing a stable foundation for welding, thereby improving the splicing and welding accuracy of the skeleton.

[0017] The present invention is further configured such that: the connection between the active wedge block and the driven wedge block is provided with a suitable inclined surface, and the active wedge block and the driven wedge block are used in cooperation through the inclined surface.

[0018] By adopting the above technical solution, the smooth transmission between the active wedge block and the driven wedge block is ensured by the setting of the adaptive inclined surface, which can generate a large lateral clamping force under a small axial thrust, thus ensuring the clamping effect.

[0019] The invention is further configured such that: a support plate is welded inside the hollow tube, a push rod is slidably disposed inside the support plate, and a piston plate is welded to the bottom of the push rod; the surface of the piston plate is in sliding contact with the inner wall of the hollow tube; the top of the push rod is welded to a push rod; a second return spring is sleeved on the surface of the push rod; and the two ends of the second return spring abut against the support plate and the piston plate, respectively.

[0020] Using the above technical solution, the compressed air inside the hollow tube is compressed by the pressure column. As the volume of the hollow tube is compressed, the compressed air can push the piston plate and the push rod to move. At the same time, it overcomes the elastic force of the second return spring, allowing the push rod to push the push rod to move, realizing the cooperation between the active wedge block and the driven wedge block, thereby fixing the ejector pin to the moving seat. When the top fixing component resets and releases the fixation on the top of the sunroof frame, the follower plate and the pressure column release the compression of the compressed air inside the hollow tube. Using the elastic force of the second return spring, the piston plate and the push rod can be reset, thereby separating the moving seat from the fixed seat, releasing the rigid fixation on the ejector pin, and realizing the automatic reset of the rigid fixing component.

[0021] The present invention is further configured such that: the movable seat and the fixed base are provided with a plurality of fixed slots for use with the ejector pin at the connection point; a plurality of guide rods are welded along the length direction on the side of the movable seat near the fixed base; the guide rods slide in contact with the inner wall of the fixed base; and the guide rods contact the push plate between the inner wall of the fixed base and the push plate; and an elastic sheet is provided between the push plate and the inner wall of the fixed base.

[0022] Using the above technical solution, when the movable seat moves towards the fixed base, the guide rod slides along the inner wall of the fixed base, and the push plate is pressed against the elastic sheet. When the driven wedge block loses the pressure of the active wedge block, the elastic sheet pushes the push plate and guide rod to move, thereby releasing the movable seat from fixing the ejector pin.

[0023] The present invention is further configured such that: an air pipe runs through the interior of the upper mounting plate, and the air pipe is fixedly connected to the fixing plate, and two adjacent air pipes are connected by a quick connector.

[0024] Using the above technical solution, an external air source is connected through an air pipe to provide compressed air to the expansion cavity. The quick-connect fitting facilitates the rapid connection of the air paths of each top fixing component into a unified air supply network, which is controlled by a main valve. By controlling the pressure and on / off state of a single air source, the actions of all top fixing components can be controlled synchronously.

[0025] Compared with the prior art, the present invention provides an auxiliary positioning and welding device for magnesium alloy sunroof frames, which has the following advantages: This magnesium alloy sunroof frame auxiliary positioning and welding device, through the setting of an auxiliary positioning structure, allows the arrayed bottom support components to adaptively conform to the frame contour with extremely low pressure during operation, precisely fitting the three-dimensional shape of the sunroof frame's horizontal and vertical beams, achieving stress-free initial positioning. Then, the top fixing component provides flexible clamping force from above, forming flexible constraints on the sunroof frame's horizontal and vertical beams in the vertical direction. When the top fixing component is in close contact with the frame, it drives the pressure column to move through the follower plate, causing the pressure column to drive the rigid fixing component to move, thus rigidly locking the position of the bottom support component. This transforms all adaptive bottom support units into rigid pillars, providing a stable foundation for welding, thereby improving the splicing and welding accuracy of the frame, effectively avoiding joint misalignment caused by positioning deviation, and ensuring the welding strength of the sunroof frame. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram showing the connection between the auxiliary positioning structure and the skylight crossbeam fixing seat and the skylight longitudinal beam fixing seat in this invention; Figure 3 This is a schematic diagram showing the connection between the auxiliary positioning structure and the skylight beam fixing seat in this invention; Figure 4 This is a schematic diagram of the top fixing component in this invention; Figure 5 This is a schematic diagram showing the connection between the bottom support component and the skylight beam fixing seat in this invention; Figure 6This is a schematic diagram of the rigid fixing component in this invention; Figure 7 This is a schematic diagram showing the connection between the hollow tube, the pressure column, and the push rod in this invention.

[0027] In the diagram: 1. Welding platform; 2. Welding structure; 3. Sunroof crossbeam fixing seat; 4. Sunroof longitudinal beam fixing seat; 5. Auxiliary positioning structure; 51. Top fixing assembly; 511. Upper mounting plate; 512. Fixing plate; 513. Rubber plate; 514. Corrugated plate; 515. Telescopic rod; 516. Return spring; 52. Bottom support assembly; 521. Ejector pin; 522. Magnetic plate; 523. Positioning plate; 524. Electromagnet; 525. Guide column; 526. First return spring; 53. Rigid fixing assembly; 531. Fixed base; 532. Moving seat; 533. Moving plate; 534. Driven wedge block; 535. Active wedge block; 536. Push rod; 537. Hollow tube; 54. Pressing column; 55. Follower plate; 6. Connecting plate; 7. Support plate; 8. Push rod; 9. Piston plate; 10. Second return spring; 11. Guide rod; 12. Push plate; 13. Elastic sheet; 14. Air tube. Detailed Implementation

[0028] 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.

[0029] Please see Figure 1-7 A magnesium alloy sunroof frame auxiliary positioning welding device includes a welding platform 1, a welding structure 2 slidably disposed on the top of the welding platform 1, a sunroof crossbeam fixing seat 3 bolted to the front and rear sides of the top of the welding platform 1, a sunroof longitudinal beam fixing seat 4 bolted to both sides between the two sunroof crossbeam fixing seats 3, and an auxiliary positioning structure 5 disposed inside the sunroof crossbeam fixing seat 3 and the sunroof longitudinal beam fixing seat 4. The auxiliary positioning structure 5 includes a top fixing component 51, which is bolted to the top of the sunroof crossbeam fixing seat 3 and the sunroof longitudinal beam fixing seat 4. Several bottom support components 52 are slidably arranged along the length of the interior of both the sunroof crossbeam fixing seat 3 and the sunroof longitudinal beam fixing seat 4. Rigid fixing components 53 are snapped onto the surface of each bottom support component 52, and the other end of each rigid fixing component 53 is located on the outside of both the sunroof crossbeam fixing seat 3 and the sunroof longitudinal beam fixing seat 4, with a sliding pressure post 54. A follower plate 55 is welded to the top of each pressure post 54, and the other end of the follower plate 55 is fixedly connected to the top fixing component 51. By setting the auxiliary positioning structure 5, during operation, the array-distributed bottom support components 52 initially operate with extremely low pressure. The force adaptively conforms to the outline of the frame, precisely fitting the three-dimensional shape of the sunroof frame's horizontal and vertical beams, achieving stress-free initial positioning. Then, the top fixing component 51 provides flexible clamping force from above, forming flexible constraints on the sunroof frame's horizontal and vertical beams in the vertical direction. When the top fixing component 51 is in close contact with the frame, it drives the pressure column 54 to move through the follower plate 55, causing the pressure column 54 to drive the rigid fixing component 53 to move. This rigid fixing component 53 rigidly locks the position of the bottom support component 52, transforming all adaptive bottom support units into rigid pillars, providing a stable foundation for welding. This improves the splicing and welding accuracy of the frame, effectively avoiding joint misalignment caused by positioning offset, and ensuring the welding strength of the sunroof frame.

[0030] The top fixing component 51 includes an upper mounting plate 511, with a fixing plate 512 bolted to the bottom of the upper mounting plate 511. A rubber plate 513 is provided at the bottom of the fixing plate 512, and a corrugated plate 514 surrounds the rubber plate 513 and the fixing plate 512. The corrugated plate 514, the fixing plate 512, and the rubber plate 513 form an expansion cavity. Several telescopic rods 515 are fixedly connected to the top of the rubber plate 513 along its length, and the top of each telescopic rod 515 is fixedly connected to the fixing plate 512. A return spring 516 is sleeved on the surface of each telescopic rod 515, and both ends of the return spring 516 are connected to the fixing plate 512 and the rubber plate 513, respectively. By setting the top fixing component 51, after the frame is placed, gas (such as compressed air) is introduced into the expansion cavity, which can extend the corrugated plate 514 and push the rubber plate 513 downward to generate uniform pressure. At the same time, the telescopic rod 515 and the return spring 516 are stretched, and the pressure can be applied to the sunroof frame through the rubber plate 513. In conjunction with the bottom support component 52, it forms a flexible constraint on the horizontal and vertical beams of the sunroof frame. Furthermore, the flexible pressure surface formed by the rubber plate 513 and the corrugated plate 514 can uniformly adapt to the small undulations of the frame surface, avoid excessive local pressure that may cause workpiece deformation, and adapt to the shape of the frame surface to provide good positioning pressure.

[0031] Among them, the top of the sunroof crossbeam fixing seat 3 and the sunroof longitudinal beam fixing seat 4 are slidably connected to the connecting plate 6. The connection between the connecting plate 6 and the sunroof crossbeam fixing seat 3 and the sunroof longitudinal beam fixing seat 4 is fixed by bolts. The top of the connecting plate 6 is bolted to the upper mounting plate 511. Through the sliding installation design of the connecting plate 6, the top fixing component 51 can be flexibly disassembled and assembled with the sunroof crossbeam fixing seat 3 and the sunroof longitudinal beam fixing seat 4, further improving the versatility of the device.

[0032] The bottom support assembly 52 includes a push pin 521, which is slidably disposed inside the sunroof crossbeam fixing seat 3 and the sunroof longitudinal beam fixing seat 4. A magnetic plate 522 is bolted to the bottom of the push pin 521. A positioning plate 523 is disposed at the bottom of the magnetic plate 522. An electromagnet 524 is bolted to the top of the positioning plate 523, and the electromagnet 524 works in conjunction with the magnetic plate 522. A guide post 525 slides through the interior of the magnetic plate 522, and the bottom of the guide post 525 is bolted to the positioning plate 523. A first return spring 526 is sleeved on the surface of the guide post 525, and the two ends of the first return spring 526 are respectively connected to the magnetic plate 522 and the positioning plate 523. 23 Connection: By setting the bottom support component 52, when the frame is placed on the support surface formed by several pins 521, the pins 521 move downward under the weight of the frame, pushing the magnetic plate 522 to slide along the surface of the guide post 525 and compress the first return spring 526. This allows the pins 521 to adaptively conform to the frame contour and precisely conform to the three-dimensional shape of the sunroof frame's crossbeams and longitudinal beams. Furthermore, by utilizing the elasticity of the first return spring 526 and the magnetic field generated by the energized electromagnet 524, a repulsive force opposite to that of the magnetic plate 522 can be generated, thereby making the pins 521 in close contact with the frame surface and achieving the effect of supporting and positioning the bottom of the frame.

[0033] Among them, the ejector pins 521 are respectively arranged along the length direction of the sunroof crossbeam fixing seat 3 and the sunroof longitudinal beam fixing seat 4. The interior of the sunroof crossbeam fixing seat 3 and the sunroof longitudinal beam fixing seat 4 are provided with guide holes for use with the ejector pins 521. With multiple ejector pins 521 arranged along the length direction of the fixing seat, their sliding stroke is limited by the accuracy and length of the guide holes. During the operation, each ejector pin 521 makes a strict vertical movement under the constraint of the guide holes to ensure the accuracy of the support direction and prevent deviation.

[0034] The rigid fixing component 53 includes a fixing base 531 located between two adjacent ejector pins 521. The top of the fixing base 531 is bolted to the inner wall of the sunroof crossbeam fixing seat 3 and the sunroof longitudinal beam fixing seat 4, respectively. Movable seats 532 are slidably arranged on the inner sides of both the sunroof crossbeam fixing seat 3 and the sunroof longitudinal beam fixing seat 4. The movable seats 532 and the fixed base 531 are in close contact with the ejector pins 521. A movable plate 533 is welded to the side of the movable seat 532 away from the fixed seat. A driven wedge block 534 is welded to the other end of the movable plate 533. The other end of the driven wedge block 534 contacts an active wedge block 535. A push rod 536 is welded to the bottom of the active wedge block 535. A hollow tube 537 is slidably sleeved on the bottom end of the push rod 536. The other end of the hollow tube 537 is used in conjunction with a pressing column 54. This rigid fixing component 53 provides the necessary functionality. When the top fixing component 51 is in close contact with the skeleton, the follower plate 55 drives the pressure column 54 to move, causing the pressure column 54 to squeeze the compressed air inside the hollow tube 537. As the volume of the hollow tube 537 is compressed, the compressed air can push the push rod 536 upward and simultaneously drive the active wedge block 535 to move. Due to the interaction between the inclined surfaces of the active wedge block 535 and the driven wedge block 534, the vertical movement of the active wedge block 535 is converted into the horizontal movement of the driven wedge block 534. The driven wedge block 534 drives the moving seat 532 to move horizontally towards the fixed base 531 through the moving plate 533, so that the moving seat 532 and the fixed slot on the fixed base 531 simultaneously clamp all the ejector pins 521 located therebetween from both sides, achieving rigid fixation of the ejector pins 521, providing a stable foundation for welding, thereby improving the splicing and welding accuracy of the skeleton.

[0035] The active wedge block 535 and the driven wedge block 534 are both provided with matching inclined surfaces at their connection points. The active wedge block 535 and the driven wedge block 534 are used in cooperation through the inclined surfaces. The setting of the matching inclined surfaces ensures smooth transmission between the active wedge block 535 and the driven wedge block 534, and can generate a large lateral clamping force under a small axial thrust, thus ensuring the clamping effect.

[0036] The hollow tube 537 has a support plate 7 welded inside, and a push rod 8 is slidably mounted inside the support plate 7. A piston plate 9 is welded to the bottom of the push rod 8, and the surface of the piston plate 9 slides in contact with the inner wall of the hollow tube 537. The top of the push rod 8 is welded to the push rod 536, and a second return spring 10 is sleeved on the surface of the push rod 8. The two ends of the second return spring 10 abut against the support plate 7 and the piston plate 9, respectively. When the pressure column 54 compresses the compressed air inside the hollow tube 537, the compressed air can push the piston plate 9 and the push rod 8 to move, while overcoming the second return spring 9. The spring force of the second return spring 10 enables the push rod 8 to push the push rod 536 to move, realizing the cooperation between the active wedge block 535 and the driven wedge block 534, thereby fixing the moving seat 532 to the ejector pin 521; when the top fixing component 51 resets and releases the fixation of the top of the sunroof frame, the follower plate 55 and the pressure column 54 release the compression of the compressed air in the hollow tube 537. Using the spring force of the second return spring 10, the piston plate 9 and the push rod 8 can be reset, thereby separating the moving seat 532 from the fixed seat, releasing the rigid fixation of the ejector pin 521, and realizing the automatic reset of the rigid fixing component 53.

[0037] The movable seat 532 and the fixed base 531 are connected by several fixed slots that cooperate with the ejector pin 521. Several guide rods 11 are welded along the length of the movable seat 532 near the fixed base 531. The guide rods 11 slide in contact with the inner wall of the fixed base 531, and the guide rods 11 contact the push plate 12 between the inner wall of the fixed base 531 and the push plate 12. An elastic sheet 13 is provided between the push plate 12 and the inner wall of the fixed base 531. When the movable seat 532 moves toward the fixed base 531, the guide rods 11 slide along the inner wall of the fixed base, and the push plate 12 is pressed against the elastic sheet 13. When the driven wedge block 534 loses the pressure of the active wedge block 535, the elasticity of the elastic sheet 13 pushes the push plate 12 and the guide rods 11 to move, thereby releasing the movable seat 532 from fixing the ejector pin 521.

[0038] The upper mounting plate 511 has an air pipe 14 running through it, and the air pipe 14 is fixedly connected to the fixing plate 512. Adjacent air pipes 14 are connected by quick connectors. The air pipes 14 are connected to an external air source to provide compressed air to the expansion cavity. The quick connectors facilitate the quick connection of the air paths of each top fixing component 51 into a unified air supply network, which is controlled by a main valve. By controlling the pressure and on / off of a single air source, the operation of all top fixing components 51 can be synchronously controlled.

[0039] The working principle of this embodiment is as follows: Loosen the bolts of the connecting plate 6, slide and adjust the position of the top fixing component 51, place the sunroof frame to be processed inside the sunroof crossbeam fixing seat 3 and the sunroof longitudinal beam fixing seat 4, reset the top fixing component 51 and tighten the bolts, then connect the air pipes 14 through quick connectors and connect an external air source to form a unified air supply network; after the frame is placed in the corresponding fixing seat, its own weight causes several pins 521 to move downward, the magnetic plate 522 slides along the guide post 525 and compresses the first reset spring 526, the pins 521 adaptively conform to the frame contour, and the repulsive force generated by the electromagnet 524, combined with the elastic force of the first reset spring 526, makes the pins 521 make tight contact with the bottom of the frame, completing the stress-free initial positioning; then compressed air is introduced into the expansion cavity through the air pipe 14, the corrugated plate 514 extends and pushes the rubber plate 513 downward, the telescopic rod 515 and the reset spring 516 are stretched, the rubber plate 513 evenly conforms to the top of the frame and applies a soft The pressure, together with the bottom support component 52, forms a flexible constraint in the vertical direction. At the same time, the rubber plate 513 is pressed, causing the follower plate 55 to move downward, driving the pressure column 54 to squeeze the compressed air in the hollow tube 537. The air pressure in the hollow tube 537 increases, pushing the piston plate 9 upward. Overcoming the elastic force of the second return spring 10, it drives the push rod 536 and the active wedge block 535 to rise. Through the adaptive inclined surface, the driven wedge block 534 moves laterally. The moving seat 532 moves closer to the fixed base 531 along the guide rod 11. The fixed slot clamps the ejector pin 521 from both sides, turning the adaptive support unit into a rigid support column. Finally, the welding structure 2 is started to precisely weld the frame crossbeam and longitudinal beam. After welding, the air source and electromagnet 524 are turned off. The return spring 516, the first return spring 526 and the second return spring 10 drive each component to reset. The elastic plate 13 pushes the moving seat 532 to release the ejector pin 521 from locking. The ejector pin 521 moves downward, and the welded sunroof frame can be taken out.

[0040] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. Those skilled in the art can make modifications to this embodiment without contributing any inventive step after reading this specification. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An auxiliary positioning and welding device for a magnesium alloy sunroof frame, comprising a welding platform (1), characterized in that: The welding platform (1) is slidably provided with a welding structure (2). The front and rear sides of the top of the welding platform (1) are bolted with skylight beam fixing seats (3). The two sides between the two skylight beam fixing seats (3) are bolted with skylight longitudinal beam fixing seats (4). The interior of the skylight beam fixing seats (3) and the skylight longitudinal beam fixing seats (4) are provided with auxiliary positioning structures (5). The auxiliary positioning structure (5) includes a top fixing component (51), which is bolted to the top of the sunroof crossbeam fixing seat (3) and the sunroof longitudinal beam fixing seat (4). Several bottom support components (52) are slidably arranged inside the sunroof crossbeam fixing seat (3) and the sunroof longitudinal beam fixing seat (4) along the length direction. A rigid fixing component (53) is snapped onto the surface of the bottom support component (52). The other end of the rigid fixing component (53) is located on the outside of the sunroof crossbeam fixing seat (3) and the sunroof longitudinal beam fixing seat (4) and is slidably arranged with a pressure column (54). A follower plate (55) is welded to the top of the pressure column (54), and the other end of the follower plate (55) is fixedly connected to the top fixing component (51).

2. The auxiliary positioning and welding device for a magnesium alloy sunroof frame according to claim 1, characterized in that: The top fixing assembly (51) includes an upper mounting plate (511), a fixing plate (512) is bolted to the bottom of the upper mounting plate (511), and a rubber plate (513) is provided at the bottom of the fixing plate (512). A corrugated plate (514) is enclosed between the rubber plate (513) and the fixing plate (512). An expansion cavity is formed between the corrugated plate (514), the fixing plate (512) and the rubber plate (513). Several telescopic rods (515) are fixedly connected to the top of the rubber plate (513) along the length direction, and the top of the telescopic rods (515) is fixedly connected to the fixing plate (512). A return spring (516) is sleeved on the surface of the telescopic rods (515), and the two ends of the return spring (516) are respectively connected to the fixing plate (512) and the rubber plate (513).

3. The auxiliary positioning and welding device for a magnesium alloy sunroof frame according to claim 2, characterized in that: The top of the skylight crossbeam fixing seat (3) and the skylight longitudinal beam fixing seat (4) are slidably connected to a connecting plate (6). The connection between the connecting plate (6) and the skylight crossbeam fixing seat (3) and the skylight longitudinal beam fixing seat (4) is fixed by bolts, and the top of the connecting plate (6) is bolted to the upper mounting plate (511).

4. The auxiliary positioning and welding device for a magnesium alloy sunroof frame according to claim 1, characterized in that: The bottom support assembly (52) includes a pin (521), which is slidably disposed inside the sunroof crossbeam fixing seat (3) and the sunroof longitudinal beam fixing seat (4). A magnetic plate (522) is bolted to the bottom of the pin (521), and a positioning plate (523) is provided at the bottom of the magnetic plate (522). An electromagnet (524) is bolted to the top of the positioning plate (523), and the electromagnet (524) works in conjunction with the magnetic plate (522). A guide post (525) slides through the inside of the magnetic plate (522), and the bottom of the guide post (525) is bolted to the positioning plate (523). A first return spring (526) is sleeved on the surface of the guide post (525), and the two ends of the first return spring (526) are respectively connected to the magnetic plate (522) and the positioning plate (523).

5. The auxiliary positioning and welding device for a magnesium alloy sunroof frame according to claim 4, characterized in that: The ejector pin (521) is arranged along the length of the skylight crossbeam fixing seat (3) and the skylight longitudinal beam fixing seat (4), respectively. The skylight crossbeam fixing seat (3) and the skylight longitudinal beam fixing seat (4) are both provided with guide holes for use with the ejector pin (521).

6. The auxiliary positioning and welding device for a magnesium alloy sunroof frame according to claim 4, characterized in that: The rigid fixing assembly (53) includes a fixing base (531) located in the middle of two adjacent ejector pins (521), and the top of the fixing base (531) is bolted to the inner wall of the skylight crossbeam fixing seat (3) and the skylight longitudinal beam fixing seat (4), respectively. Movable seats (532) are slidably provided on the inner sides of both the skylight crossbeam fixing seat (3) and the skylight longitudinal beam fixing seat (4). The movable seats (532) and the fixing base (531) are in close contact with the ejector pins (521) on the side closest to them. A movable plate (533) is welded to the side of the movable seat (532) away from the fixed seat, and a driven wedge block (534) is welded to the other end of the movable plate (533). The other end of the driven wedge block (534) contacts an active wedge block (535). A push rod (536) is welded to the bottom of the active wedge block (535), and a hollow tube (537) is slidably sleeved on the bottom end of the push rod (536). The other end of the hollow tube (537) is used in conjunction with the pressure column (54).

7. The auxiliary positioning and welding device for a magnesium alloy sunroof frame according to claim 6, characterized in that: The connection between the active wedge block (535) and the driven wedge block (534) is provided with a suitable inclined surface, and the active wedge block (535) and the driven wedge block (534) are used in cooperation through the inclined surface.

8. The auxiliary positioning and welding device for a magnesium alloy sunroof frame according to claim 6, characterized in that: The hollow tube (537) has a support plate (7) welded inside. A push rod (8) is slidably arranged inside the support plate (7), and a piston plate (9) is welded to the bottom of the push rod (8). The surface of the piston plate (9) slides in contact with the inner wall of the hollow tube (537). The top of the push rod (8) is welded to the push rod (536). A second return spring (10) is sleeved on the surface of the push rod (8). The two ends of the second return spring (10) abut against the support plate (7) and the piston plate (9) respectively.

9. The auxiliary positioning and welding device for a magnesium alloy sunroof frame according to claim 6, characterized in that: The movable seat (532) and the fixed base (531) are connected with a number of fixed slots that are used to cooperate with the ejector pin (521). A number of guide rods (11) are welded along the length of the side of the movable seat (532) near the fixed base (531). The guide rods (11) slide in contact with the inner wall of the fixed base (531), and a push plate (12) is in contact between the guide rods (11) and the inner wall of the fixed base (531). An elastic sheet (13) is provided between the push plate (12) and the inner wall of the fixed base (531).

10. The auxiliary positioning and welding device for a magnesium alloy sunroof frame according to claim 2, characterized in that: An air pipe (14) runs through the interior of the upper mounting plate (511), and the air pipe (14) is fixedly connected to the fixing plate (512). Two adjacent air pipes (14) are connected by quick connectors.

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