Welding process for split type frame assembly of panoramic sunroof of passenger vehicle

Abstract

The invention discloses a passenger car panoramic sunroof split type frame assembly welding process. A robot is used for transferring a middle cross beam, a left side beam, a right side beam, a front cross beam and a rear cross beam which are fed to the position of a gluing gun for gluing; transferring the glued middle cross beam, the left and right boundary beams, the front cross beam and the rear cross beam to welding positions to perform spot welding on joints; positioning pin welding is conducted on the middle cross beam, the left side beam, the right side beam, the front cross beam and the rear cross beam which are subjected to spot welding, repair welding is conducted on the middle cross beam, the front cross beam and the rear cross beam, and bolts are welded to set positions of the middle cross beam, the left side beam, the right side beam, the front cross beam and the rear cross beam; nuts and bolts are welded at set positions on the upper surfaces and the lower surfaces of the middle cross beam, the left and right side beams, the front cross beam and the rear cross beam; and then the mounted sunshade curtain front mounting bracket and the mounted sunshade curtain rear mounting bracket are welded to form an assembled split type frame assembly. The large-scale production of the split type frame assembly of the panoramic sunroof can be realized, and a panoramic sunroof product with low cost and high quality can be provided for customers.

Description

Technical Field

[0001] The invention belongs to the technical field of panoramic sunroofs for passenger vehicles, and in particular relates to a welding process for a split frame assembly of a panoramic sunroof for a passenger vehicle. Background Art

[0002] The panoramic sunroof of passenger cars is one of the common standard configurations of current sedans and SUVs, and has been liked and recognized by the majority of users. The frame assembly of the panoramic sunroof is the largest component of the panoramic sunroof, and its cost accounts for about 40% of the panoramic sunroof.

[0003] The product structure of the traditional panoramic sunroof is made by welding various small brackets and standard parts on the overall frame body. The panoramic sunroof frame assembly with this structure has low raw material utilization (30%~36%), high production cost, simple production process (overall stamping + assembly welding), low product dimensional accuracy (nut position accuracy 1.5, surface contour accuracy 2.0), and cannot meet customer needs. Summary of the invention

[0004] To this end, the present invention provides a welding process for a split frame assembly of a panoramic sunroof for a passenger car, so as to solve the problems of low raw material utilization, high production cost, simple production process and low product dimensional accuracy existing in the traditional technology.

[0005] In order to achieve the above object, the present invention provides the following technical solution: a welding process for a split frame assembly of a panoramic sunroof for a passenger car, comprising the following steps: Load the pipe clamp, sunshade front mounting bracket, sunshade rear mounting bracket, middle crossbeam, left and right side beams, front crossbeam, rear crossbeam and positioning pins through the loading slide; Use the robot to transfer the loaded middle beam, left and right side beams, front beam and rear beam to the glue gun position, and use the glue gun to apply glue to the splicing positions of the middle beam, left and right side beams, front beam and rear beam; Using a robot to transfer the glue-coated middle beam, the left and right side beams, the front beam, and the rear beam to a welding position, and spot-welding the connection positions of the middle beam, the left and right side beams, the front beam, and the rear beam; Welding the positioning pins to the spot-welded middle beam, the left and right side beams, the front beam, and the rear beam, and performing repair welding on the middle beam, the front beam, and the rear beam, and welding bolts to the set positions of the middle beam, the left and right side beams, the front beam, and the rear beam; Welding nuts and bolts at set positions on the upper surfaces of the middle cross beam, the left and right side beams, the front cross beam, and the rear cross beam, and on the lower surfaces of the middle cross beam, the left and right side beams, the front cross beam, and the rear cross beam; After welding nuts and bolts, the middle cross beam, the left and right side beams, the front cross beam and the rear cross beam are installed with the front mounting bracket and the rear mounting bracket of the sunshade curtain, and the installed front mounting bracket and the rear mounting bracket of the sunshade curtain are welded to form an assembled split frame assembly.

[0006] As a preferred solution for the welding process of the split frame assembly of the panoramic sunroof of a passenger car, the center cross beam, the left and right side beams, the front cross beam and the rear cross beam after spot welding are welded with the locating pins using the locating pin seat points, and the center cross beam, the front cross beam and the rear cross beam are repair-welded using a repair welding clamp.

[0007] As a preferred solution for the welding process of the split frame assembly of the panoramic sunroof of a passenger car, nuts and bolts are point-welded using M6 nut seats at set positions on the upper surfaces of the middle cross beam, the left and right side beams, the front cross beam, and the rear cross beam, and the lower surfaces of the middle cross beam, the left and right side beams, the front cross beam, and the rear cross beam.

[0008] As a preferred solution for the welding process of the split frame assembly of the panoramic sunroof of a passenger car, the positioning deviation of the positioning pin and the matching positioning nut is 0.9 mm.

[0009] As a preferred solution for the welding process of the split frame assembly of the panoramic sunroof of a passenger car, a robot is used to grab the split frame assembly to match the nut position accuracy. The robot positioning accuracy is 0.1mm, and the position accuracy of the welding nut is 0.9mm+0.1mm=1.0mm.

[0010] As the optimal solution for the welding process of the split frame assembly of the panoramic sunroof of a passenger car, the welding position of the nut is the position deviation between the nut and the locating pin and the repeatability of the robot's grasping and delivery of the parts.

[0011] As a preferred solution for the welding process of the split frame assembly of the panoramic sunroof of a passenger car, the diameter of the nut bottom hole of the split frame assembly is enlarged to 8.0 mm. The positioning accuracy of the nut is not limited by the bottom hole position accuracy and the hole diameter to provide a 1.5 mm positioning adjustment amount for the robot gripping system.

[0012] As the preferred solution for the welding process of the split frame assembly of the panoramic sunroof of a passenger car, it also includes: standard parts inspection of the assembled split frame assembly, cleaning of welding slag, gluing and installation.

[0013] The beneficial effects of the present invention are as follows: the pipe clamp, the sunshade front mounting bracket, the sunshade rear mounting bracket, the middle crossbeam, the left and right side beams, the front crossbeam, the rear crossbeam, and the positioning pins are loaded through the loading slide; the loaded middle crossbeam, the left and right side beams, the front crossbeam, and the rear crossbeam are transferred to the glue gun position by a robot, and the splicing positions of the middle crossbeam, the left and right side beams, the front crossbeam, and the rear crossbeam are glued by the glue gun; the glued middle crossbeam, the left and right side beams, the front crossbeam, and the rear crossbeam are transferred to the welding position by a robot, and the connection positions of the middle crossbeam, the left and right side beams, the front crossbeam, and the rear crossbeam are spot welded; the middle crossbeam, the left and right side beams, the front crossbeam, and the rear crossbeam after spot welding are positioned The pins are welded, and the middle crossbeam, the front crossbeam and the rear crossbeam are repaired, and bolts are welded at set positions of the middle crossbeam, the left and right side beams, the front crossbeam and the rear crossbeam; nuts and bolts are welded at set positions on the upper surfaces of the middle crossbeam, the left and right side beams, the front crossbeam and the rear crossbeam, and the lower surfaces of the middle crossbeam, the left and right side beams, the front crossbeam and the rear crossbeam; the front mounting bracket and the rear mounting bracket of the sunshade are installed on the middle crossbeam, the left and right side beams, the front crossbeam and the rear crossbeam after the nuts and bolts are welded, and the installed front mounting bracket and the rear mounting bracket of the sunshade are welded to form an assembled split frame assembly. The present invention is conducive to realizing mass production of split frame assemblies of panoramic sunroofs, and can provide customers with low-cost, high-quality panoramic sunroof products. Experiments show that the material utilization rate of the frame assembly is increased to 64.8%, and the product cost is reduced by 30%, which is conducive to enterprises adapting to the fiercely competitive environment of the automobile market and improving the market competitiveness of enterprises. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0015] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0016] Figure 1A schematic diagram of a welding process flow of a split frame assembly of a panoramic sunroof for a passenger vehicle provided in an embodiment of the present invention; Figure 2 It is a schematic diagram of the combination of positioning pins and nuts in the welding process of the split frame assembly of the panoramic sunroof of a passenger car provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0017] The following is a description of the implementation of the present invention by specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figure 1 The embodiment of the present invention provides a welding process for a split frame assembly of a panoramic sunroof of a passenger car, comprising the following steps: S1. Load the pipe clamp, sunshade front mounting bracket, sunshade rear mounting bracket, middle crossbeam, left and right side beams, front crossbeam, rear crossbeam and positioning pins through the loading slide; S2. Use a robot to transfer the loaded middle beam, left and right side beams, front beam, and rear beam to the glue gun position, and use the glue gun to apply glue to the splicing positions of the middle beam, left and right side beams, front beam, and rear beam; S3, using a robot to transfer the glue-coated middle beam, the left and right side beams, the front beam, and the rear beam to a welding position, and spot-welding the connection positions of the middle beam, the left and right side beams, the front beam, and the rear beam; S4, welding the positioning pins to the spot-welded middle beam, the left and right side beams, the front beam, and the rear beam, and performing repair welding on the middle beam, the front beam, and the rear beam, and welding bolts at set positions of the middle beam, the left and right side beams, the front beam, and the rear beam; S5, welding nuts and bolts at set positions on the upper surfaces of the middle cross beam, the left and right side beams, the front cross beam, and the rear cross beam, and the lower surfaces of the middle cross beam, the left and right side beams, the front cross beam, and the rear cross beam; S6. Install the front mounting bracket and the rear mounting bracket of the sunshade curtain on the middle cross beam, the left and right side beams, the front cross beam and the rear cross beam after welding nuts and bolts, and weld the installed front mounting bracket and the rear mounting bracket of the sunshade curtain to form an assembled split frame assembly.

[0019] In this embodiment, in step S1, a loading slide is used to load the pipe clamps, the front mounting bracket of the sunshade, the rear mounting bracket of the sunshade, the middle crossbeam, the left and right side beams, the front crossbeam, the rear crossbeam, and the positioning pins. Then, in step S2, a robot is used to transfer the loaded middle crossbeam, the left and right side beams, the front crossbeam, and the rear crossbeam to the position of the gluing gun, and the gluing gun is used to coat the splicing positions of the middle crossbeam, the left and right side beams, the front crossbeam, and the rear crossbeam.

[0020] Specifically, the joints of the center beam, left and right side beams, front beam, and rear beam are the main locations for gluing to ensure that the joints of the frame can be tightly combined to prevent water leakage. When applying the glue, pay attention to the uniform distribution of the glue to ensure that each joint is fully sealed. In addition, the joints between the left and right side beams, front beam, rear beam and the body also need to be glued to ensure the sealing between the frame and the body. The edges of the left and right side beams, front beam, and rear beam also need to be glued to prevent moisture penetration. When applying the glue, ensure that the glue strip fits tightly with the edge of the frame without any gaps.

[0021] In this embodiment, in step S4, the center beam, the left and right side beams, the front beam, and the rear beam after spot welding are welded with the positioning pins using the positioning pin seats, and the center beam, the front beam, and the rear beam are repaired with the repair welding tongs. In step S5, nuts and bolts are welded at the set positions of the upper surfaces of the center beam, the left and right side beams, the front beam, and the rear beam, and the lower surfaces of the center beam, the left and right side beams, the front beam, and the rear beam using the M6 ​​nut seats.

[0022] In this embodiment, the assembled split frame assembly is further comprised of: checking standard parts, cleaning welding slag, and applying glue to the assembled split frame assembly outside the production line. When the standard parts of the split frame assembly are inspected and qualified, the welding slag is cleaned, and the glue is applied, the split frame assembly can be mounted for use.

[0023] See also Figure 2 In a possible embodiment, the positioning deviation of the locating pin and the matching locating nut is 0.9mm. At the same time, the split frame assembly is grasped by a robot to match the nut position accuracy. The robot positioning accuracy is 0.1mm, and the position accuracy of the welded nut is 0.9mm+0.1mm=1.0mm. The welding position of the nut is the position deviation between the nut and the locating pin and the repeat position accuracy of the robot grasping and delivering the parts. Among them, the diameter of the nut bottom hole of the split frame assembly is enlarged to 8.0mm, and the position of the nut is not limited by the bottom hole position and the aperture to give the robot grasping system a position adjustment of 1.5mm.

[0024] Specifically, the traditional positioning reference point of the bottom hole of the frame body nut is abandoned, and the robot gripper system is used to grab the workpiece, send it to the fixed spot welding machine electrode position, and weld it with the nut. The welding position of the nut is only the position deviation between the nut and the positioning pin (0.9mm) + the repeat position accuracy of the robot gripper and delivery (0.1mm). The bottom hole of the frame body nut is enlarged from the conventional Ø6.5 to Ø8.0, so that the position of the nut is not limited by the bottom hole position and aperture, and the robot gripper system can be given a position adjustment of Ø1.5 (8.0-6.5).

[0025] Taking the Changan Automobile CD701 panoramic sunroof frame assembly as an example, its parts are large in size (2880*1328*295), with many components (29 stamping parts + 73 standard parts), and the material utilization rate reaches 64.8%; the dimensional accuracy requirements are high (bolt position accuracy 1.0mm, installation surface profile accuracy 1.0mm), the welding process is complex (including glue coating, steel plate spot welding, nut projection welding, positioning pin projection welding, bolt projection welding); high production efficiency requirements (20 pieces per hour). Through the technical solution of the embodiment of the present invention, the mass production of the CD701 frame assembly is realized, providing customers with low-cost, high-quality products, adapting to the fiercely competitive environment of the automobile market, and improving the market competitiveness of enterprises.

[0026] In summary, the present invention loads the pipe clamp, the front mounting bracket of the sunshade, the rear mounting bracket of the sunshade, the middle crossbeam, the left and right side beams, the front crossbeam, the rear crossbeam, and the positioning pins through a loading slide; uses a robot to transfer the loaded middle crossbeam, the left and right side beams, the front crossbeam, and the rear crossbeam to the position of the gluing gun, and uses the gluing gun to apply glue to the splicing positions of the middle crossbeam, the left and right side beams, the front crossbeam, and the rear crossbeam; uses a robot to transfer the glued middle crossbeam, the left and right side beams, the front crossbeam, and the rear crossbeam to the welding position, and spot welds the connection positions of the middle crossbeam, the left and right side beams, the front crossbeam, and the rear crossbeam; the positioning pins are fixed to the middle crossbeam, the left and right side beams, the front crossbeam, and the rear crossbeam after spot welding. The invention is to weld the middle beam, the front beam and the rear beam, and weld bolts at the set positions of the middle beam, the left and right side beams, the front beam and the rear beam; weld nuts and bolts at the set positions of the upper surfaces of the middle beam, the left and right side beams, the front beam and the rear beam, and the lower surfaces of the middle beam, the left and right side beams, the front beam and the rear beam; install the sunshade front mounting bracket and the sunshade rear mounting bracket on the middle beam, the left and right side beams, the front beam and the rear beam after welding nuts and bolts, and weld the installed sunshade front mounting bracket and the sunshade rear mounting bracket to form an assembled split frame assembly. The invention is conducive to realizing the mass production of the panoramic sunroof split frame assembly, and can provide customers with low-cost and high-quality panoramic sunroof products. Experiments show that the material utilization rate of the frame assembly is increased to 64.8%, and the product cost is reduced by 30%, which is conducive to enterprises adapting to the fiercely competitive environment of the automobile market and improving the market competitiveness of enterprises.

[0027] Although the present invention has been described in detail above by general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A welding process for a split frame assembly of a panoramic sunroof for a passenger car, characterized in that: The following steps are involved: Load the pipe clamp, sunshade front mounting bracket, sunshade rear mounting bracket, middle crossbeam, left and right side beams, front crossbeam, rear crossbeam and positioning pins through the loading slide; Use the robot to transfer the loaded middle beam, left and right side beams, front beam and rear beam to the glue gun position, and use the glue gun to apply glue to the splicing positions of the middle beam, left and right side beams, front beam and rear beam; Using a robot to transfer the glue-coated middle beam, the left and right side beams, the front beam, and the rear beam to a welding position, and spot-welding the connection positions of the middle beam, the left and right side beams, the front beam, and the rear beam; Welding the positioning pins to the spot-welded middle beam, the left and right side beams, the front beam, and the rear beam, and performing repair welding on the middle beam, the front beam, and the rear beam, and welding bolts to the set positions of the middle beam, the left and right side beams, the front beam, and the rear beam; Welding nuts and bolts at set positions on the upper surfaces of the middle cross beam, the left and right side beams, the front cross beam, and the rear cross beam, and on the lower surfaces of the middle cross beam, the left and right side beams, the front cross beam, and the rear cross beam; After welding nuts and bolts, the middle cross beam, the left and right side beams, the front cross beam and the rear cross beam are installed with the front mounting bracket and the rear mounting bracket of the sunshade curtain, and the installed front mounting bracket and the rear mounting bracket of the sunshade curtain are welded to form an assembled split frame assembly.

2. A welding process for a split frame assembly of a panoramic sunroof for a passenger vehicle according to claim 1, characterized in that: The spot-welded center beam, the left and right side beams, the front beam and the rear beam are welded with the positioning pins using the positioning pin seats, and the center beam, the front beam and the rear beam are repair-welded using a repair welding clamp.

3. The welding process for a split frame assembly of a panoramic sunroof for a passenger vehicle according to claim 1, characterized in that: Nuts and bolts are spot welded at set positions of the upper surfaces of the middle cross beam, the left and right side beams, the front cross beam, and the rear cross beam, and the lower surfaces of the middle cross beam, the left and right side beams, the front cross beam, and the rear cross beam using M6 nut seats.

4. The welding process for a split frame assembly of a panoramic sunroof for a passenger vehicle according to claim 1, characterized in that: The positioning deviation of the positioning pin and the matching positioning nut is 0.9 mm.

5. The welding process for a split frame assembly of a panoramic sunroof for a passenger vehicle according to claim 1, characterized in that: The split frame assembly is grasped by a robot to match the position accuracy of the nuts. The positioning accuracy of the robot is 0.1 mm, and the position accuracy of the welded nuts is 0.9 mm + 0.1 mm = 1.0 mm.

6. A passenger car panoramic sunroof split frame assembly welding process according to claim 5, characterized in that: The welding position of the nut is the position deviation between the nut and the positioning pin and the repeatability of the robot's grasping and delivery of parts.

7. A passenger car panoramic sunroof split frame assembly welding process according to claim 6, characterized in that: The diameter of the nut bottom hole of the split frame assembly is enlarged to 8.0 mm, and the position of the nut is not limited by the position of the bottom hole and the hole diameter to provide a position adjustment of 1.5 mm for the robot gripping system.

8. The welding process for a split frame assembly of a panoramic sunroof for a passenger vehicle according to claim 1, characterized in that: Also includes: The assembled split frame assembly is inspected for standard parts, weld slag is cleaned, glue is applied and installed.

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