阅读说明：本技术 一种连接白车身开闭件内外板的方法 (Method for connecting inner plate and outer plate of body-in-white opening and closing part ) 是由 周林柱 王子欣 范艳军 崔颖 张晓胜 牟朝杰 李金宝 高建昊 于 2019-08-26 设计创作，主要内容包括：本发明提供了一种连接白车身开闭件内外板的方法,首先将预装配好的开闭件内外板在焊接工位进行定位并夹紧,使开闭件内外板贴合良好；然后保持焊接工位上的闭件内外板不动,焊接机器人持激光焊接头,并采用一字线光学对焦系统完成激光束的对焦与离焦量的设定；最后采用激光焊接的方式对闭件内外板进行焊接,激光器产生的激光束由耦合光纤传送至激光焊接头,经准直和聚焦后,激光束传送至开闭件内外板的焊接位置贴合面处；所述焊接过程中,采用惰性气体对焊接熔池进行保护。本发明采用激光焊接连接开闭件内外板,取消涂折边胶、包边压合及单面焊接等工序,大幅简化开闭件生产流程、提高生产效率且降低生产成本。(The invention provides a method for connecting an inner plate and an outer plate of a body-in-white opening and closing part, which comprises the steps of firstly positioning and clamping the pre-assembled inner plate and outer plate of the opening and closing part at a welding station to ensure that the inner plate and the outer plate of the opening and closing part are well jointed; then keeping the inner and outer plates of the closed part on the welding station still, holding a laser welding head by a welding robot, and finishing the setting of the focusing and defocusing amount of the laser beam by adopting a linear optical focusing system; finally, welding the inner plate and the outer plate of the closed part in a laser welding mode, transmitting a laser beam generated by a laser to a laser welding head through a coupling optical fiber, and after collimation and focusing, transmitting the laser beam to a joint surface of a welding position of the inner plate and the outer plate of the closed part; and in the welding process, the welding pool is protected by adopting inert gas. The invention adopts laser welding to connect the inner plate and the outer plate of the opening and closing part, cancels the working procedures of coating edge folding glue, edge covering and pressing, single-side welding and the like, greatly simplifies the production flow of the opening and closing part, improves the production efficiency and reduces the production cost.)

1. A method for connecting an inner panel and an outer panel of a body-in-white opening/closing member, characterized in that:

the method comprises the following steps:

the method comprises the following steps: positioning and clamping a pre-assembled opening and closing part inner plate (2) and an opening and closing part outer plate (1) coated with damping glue at a welding station, so that the joint surface of the welding position of the opening and closing part inner plate (2) and the opening and closing part outer plate (1) is well jointed, wherein the folding angle alpha of the opening and closing part outer plate (1) is 10-60 degrees;

step two: a closing part inner plate (2) and a closing part outer plate (1) on a welding station are kept still, a welding robot holds a laser welding head, and a linear optical focusing system is adopted to finish the focusing and defocusing amount setting of a laser beam, wherein the defocusing amount range is 0-12 mm;

step three: welding a closing part inner plate (2) and a opening and closing part outer plate (1) in a laser welding mode, wherein a laser beam generated by a laser is transmitted to a laser welding head through a coupling optical fiber, after collimation and focusing, the laser beam is transmitted to a welding position joint surface of the opening and closing part inner plate (2) and the opening and closing part outer plate (1), and an included angle beta between the incident direction of the laser beam and the normal direction of the outer plate at the welding position joint surface is 30-75 degrees;

in the welding process, one or more mixed gases of nitrogen, helium or argon are adopted to protect a welding pool, and the gas flow is 5L/min-25L/min.

2. A method of attaching an inner panel and an outer panel of a body-in-white shutter according to claim 1, wherein:

the opening and closing part outer plate (1) and the opening and closing part inner plate (2) are low-alloy galvanized steel plates.

3. A method of attaching an inner panel and an outer panel of a body-in-white shutter according to claim 1, wherein:

adopt lapped laminating mode between shutter planking (1) and shutter inner panel (2), weld (3) that form through laser welding between shutter planking (1) and shutter inner panel (2) are even and continuous fillet weld.

4. A method of attaching an inner panel and an outer panel of a body-in-white shutter according to claim 1, wherein:

in the step 1, the gap between the joint surfaces of the opening and closing part inner plate (2) and the opening and closing part outer plate (1) at the welding position is not more than 0.1 mm.

5. A method of attaching an inner panel and an outer panel of a body-in-white shutter according to claim 1, wherein:

in the third step, the adopted laser welding mode is laser remote flight welding, and the welding process is as follows:

the laser beam melts the base materials on two sides of the joint surface of the welding position of the inner plate (2) and the outer plate (1) of the opening and closing part to form a welding seam (3), the welding power is 1 kW-6 kW, and the welding speed is 0.5 m/min-5 m/min.

6. A method of attaching an inner panel and an outer panel of a body-in-white shutter according to claim 1, wherein:

in the third step, the adopted laser welding mode is laser remote wire filling welding, and the welding process is as follows:

the welding wire is fed to the joint face of the welding position of the inner plate (2) of the opening and closing part and the outer plate (1) of the opening and closing part, the wire feeding direction and the laser beam are in the same plane, the welding wire melted by the laser beam is fused with base materials on two sides of the joint face of the welding position of the inner plate (2) of the opening and closing part and the outer plate 1 of the opening and closing part to form a welding seam (3), the welding power is 1 kW-6 kW, the welding speed is 0.5 m/min-5 m/min, the wire feeding speed is 0.5 m/min-6 m/min, the diameter of the welding wire is 0.5 mm-3 mm, the included angle between the laser beam and the wire feeding direction is 15-60 degrees, and.

7. A method of attaching the inner and outer panels of a body-in-white shutter according to claim 1, 5 or 6, wherein:

in the third step, the weld penetration is more than 0.1 and less than 0.5mm in the welding process.

Technical Field

The invention belongs to the technical field of automobile body connection in the automobile manufacturing technology, and particularly relates to a method for connecting an inner plate and an outer plate of a body-in-white opening and closing part.

Background

With the increasingly competitive automobile market and the continuous reduction of the price of the automobile, automobile manufacturers control the manufacturing cost of the automobile more and more strictly, and the simplification of the production flow of the automobile and the reduction of the manufacturing cost of the automobile become important problems to be solved urgently by various automobile manufacturers.

In the production and manufacturing process of the white automobile body of the automobile at the present stage, the production flow of the white automobile body opening and closing piece mainly comprises the following parts: spot welding of the inner plate assembly, coating of the outer plate with the edge folding glue and the damping glue, edge covering and pressing of the inner plate assembly and the outer plate assembly, and single-side welding after edge covering and pressing of the inner plate assembly and the outer plate assembly. The existing white body opening and closing piece has the defects of more production processes, relatively complex process, high production equipment investment, large equipment floor area, slow production takt, long equipment debugging period, poor equipment flexibility and the like.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, the present invention provides a method for connecting an inner panel and an outer panel of a body-in-white opening/closing member, which simplifies the production process of the body-in-white opening/closing member, improves the production efficiency, and reduces the production cost. The technical scheme of the invention is as follows by combining the attached drawings of the specification:

a method of connecting the inner and outer panels of a body-in-white shutter, the method comprising the steps of:

the method comprises the following steps: positioning and clamping a pre-assembled opening and closing part inner plate 2 and an opening and closing part outer plate 1 coated with damping glue at a welding station, so that the joint surface of the welding position of the opening and closing part inner plate 2 and the opening and closing part outer plate 1 is well attached, wherein the folding angle alpha of the opening and closing part outer plate 1 is 10-60 degrees;

step two: keeping a closing part inner plate 2 and a closing part outer plate 1 on a welding station still, welding a laser welding head by a welding robot, and finishing the focusing and defocusing amount setting of a laser beam by adopting a linear optical focusing system, wherein the defocusing amount range is 0-12 mm;

step three: welding the closing part inner plate 2 and the opening and closing part outer plate 1 by adopting a laser welding mode, wherein a laser beam generated by a laser is transmitted to a laser welding head through a coupling optical fiber, after collimation and focusing, the laser beam is transmitted to a joint surface of a welding position of the opening and closing part inner plate 2 and the opening and closing part outer plate 1, and an included angle beta between the incident direction of the laser beam and the normal direction of the outer plate at the joint surface of the welding position is 30-75 degrees;

in the welding process, one or more mixed gases of nitrogen, helium or argon are adopted to protect a welding pool, and the gas flow is 5L/min-25L/min.

The outer shutter plate 1 and the inner shutter plate 2 are low-alloy galvanized steel sheets.

Adopt the lapped laminating mode between shutter planking 1 and the shutter inner panel 2, the welding seam 3 that forms through laser welding between shutter planking 1 and the shutter inner panel 2 is even and continuous fillet weld.

In the step 1, the gap between the joint surfaces of the opening and closing part inner plate 2 and the opening and closing part outer plate 1 at the welding position is not more than 0.1 mm.

In the third step, the adopted laser welding mode is laser remote flight welding, and the welding process is as follows:

the laser beam melts the base materials on two sides of the joint face of the opening and closing part inner plate 2 and the opening and closing part outer plate 1, the welding power is 1 kW-6 kW, and the welding speed is 0.5 m/min-5 m/min.

In the third step, the adopted laser welding mode is laser remote wire filling welding, and the welding process is as follows:

the welding wire is fed to the joint face of the welding position of the inner plate 2 and the outer plate 1 of the opening and closing part, the wire feeding direction and the laser beam are in the same plane, the welding wire melted by the laser beam is fused with base materials on two sides of the joint face of the welding position of the inner plate 2 and the outer plate 1 of the opening and closing part to form a welding seam 3, the welding power is 1 kW-6 kW, the welding speed is 0.5 m/min-5 m/min, the wire feeding speed is 0.5 m/min-6 m/min, the diameter of the welding wire is 0.5 mm-3 mm, the included angle between the laser beam and the wire feeding direction is 15 o-60 o, and the distance between the end part of the welding wire and the surface.

In the third step, the weld penetration is more than 0.1 and less than 0.5mm in the welding process.

Compared with the prior art, the invention has the beneficial effects that:

compared with the existing method for connecting the inner plate and the outer plate of the white automobile body opening and closing part, the method for connecting the inner plate and the outer plate of the white automobile body opening and closing part adopts laser welding to connect the inner plate and the outer plate of the opening and closing part, cancels the processes of coating the outer plate with the flanging glue, the process of binding and pressing the inner plate assembly and the outer plate assembly, and the process of welding the single surface of the inner plate and the outer plate after binding and pressing, greatly simplifies the production flow of the white automobile body opening and closing part, improves the production efficiency, reduces the equipment investment, reduces the occupied area of the equipment, shortens the.

Drawings

FIG. 1 is a schematic view of a welded structure of an inner plate and an outer plate of a body-in-white opening and closing member connected by the method of the present invention;

in the figure:

1-outer plate of the shutter, 2-inner plate of the shutter, 3-weld.

Detailed Description

For clearly and completely describing the technical scheme and the specific working process thereof, the specific implementation mode of the invention is as follows by combining the attached drawings of the specification: