Improved structure of upper strip section of automobile door frame and manufacturing method of improved structure

Abstract

The invention belongs to the technical field of processing and welding of automobile parts and provides an improved structure of an upper strip section of an automobile door frame and a manufacturing method of the improved structure. The improved structure is formed by continuous rolling of a sheet and comprises a hook part, a superposition part, an automobile outer side end and a barrel-shaped part, wherein a support pocket is arranged in the middle of the barrel-shaped part; three layers of materials are formed at the superposition part among a hook extending part, a barrel-shaped starting end and a barrel-shaped extending joint part; and the three layers of materials are scanned and irradiated by laser along the length direction of the door frame and are welded and combined into a whole. The improved structure provided by the invention has the following advantages: the support pocket obtains a larger section area, so that the rigidity of a product is enhanced; the superposition part formed by laser welding is arranged in the middle position, so that the three layers of materials formed at the superposition part among the hook extending part, the barrel-shaped starting end and the barrel-shaped extending joint part can be well fixed together; laser welding is adopted, so that the overall welding strength and performance of the upper strip of the door frame are enhanced; and the barrel-shaped starting end is retracted, so that an anti-corrosion effect can be achieved, and the overall quality of the product can be ensured.

Description

technical field [0001] The invention belongs to the technical field of processing and welding of auto parts, and in particular relates to an improved structure of an upper bar section of an auto door frame and a manufacturing method thereof. Background technique [0002] The automobile door frame structure is mainly formed by rolling and has a complex cross-sectional structure, and the cross-sectional shape plays a decisive role in the sealing ability, decoration and the overall strength of the door frame when it is assembled with other counterparts, such as figure 1 As shown, the traditional door frame section adopts the wheel welding process, which is discontinuously welded at an interval of about 50 to 70 at B, and the wall thickness is thicker. There are three layers of material at A, and the width of the section is larger. At the same time, the required manufacturing materials are also relatively large. Many, resulting in heavier product weight and higher cost; such as ...

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Problems solved by technology

[0002] The automobile door frame structure is mainly formed by rolling and has a complex cross-sectional structure, and the cross-sectional shape plays a decisive role in the sealing ability, decoration and the overall strength of the door frame when it is assembled with other counterparts, such as figure 1 As shown, the traditional door frame section adopts the wheel welding process, which is discontinuously welded at an interval of about 50 to 70 at B, and the wall thickness is thicker. There are three layers of material at A, and the width of the section is larger. At the same time, the required manufacturing materials are also relatively large. Many, resulting in heavier product weight and higher cost; such as figure 2 As shown, at present, other companies use two layers of material at A, and laser continuous welding at B. Since B is far away from the laser continuous welding and the 3 positions on the outer side of the car, and because there is no welding at A, the two layers are actually used. The layers of materials may not be fixed together, and the two layers of materials may be separated when twisted, and the connection strength of the welding cannot be guaranteed. At the same time, in order to ensure the welding width, it must be bent towards the direction of the support pocket 5, which causes the area of ​​the support pocket 5 to change. small, the rigidity becomes poor, and at the same time figure 2 There is also a leaking problem in the support pocket 5

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