A b-pillar upper end joint structure

Abstract

The invention discloses a B-pillar upper end connector structure. The B-pillar upper end connector structure comprises a cantrail inner panel, a body side outer panel, a B-pillar inner panel and a B-pillar reinforced panel. The upper portion of the B-pillar inner panel is fixedly connected with the cantrail inner panel, the body side outer panel, the cantrail inner panel and the B-pillar reinforced panel are fixedly connected, the body side outer panel, the B-pillar inner panel, and the B-pillar reinforced panel are fixedly connected, the B-pillar inner panel is in the shape of an I, the position of the cantrail inner panel, which is separately fixed onto the B-pillar inner panel, is provided with an outwards-protruding stepped surface, an arc-shaped transition section is arranged between the stepped surface and the cantrail inner panel, and the upper portion of the B-pillar inner panel is fixedly connected with the stepped surface. The B-pillar upper end connector structure is simple, the fillet portion of the B-pillar upper end can avoid four-layer welding, the manufacturability of welding can be improved, gaps can be avoided, the stress value can be reduced, stress concentration can be avoided, costs can be reduced, and performance can be improved.

Description

technical field [0001] The invention relates to a relatively important joint in a white car, in particular to a joint structure at the upper end of a B-pillar of a vehicle body. Background technique [0002] The structure of the upper end joint of the B-pillar of the body is a relatively important joint in the body-in-white. This joint mainly includes the side wall outer panel, the B-pillar reinforcement panel, the upper side beam inner panel and the B-pillar inner panel. The current B-pillar inner panel and the B-pillar The column reinforcement boards are T-shaped structure boards. Therefore, in the joint structure of the upper end of the B-pillar, there will be four-layer welding of the side wall outer panel, the B-pillar reinforcement panel, the upper side sill inner panel and the B-pillar inner panel, which is prone to solder joint defects. However, in order to avoid four-layer welding, the common method is to dig a gap at the root of the rounded corner of the T-shaped ...

AI Technical Summary

Problems solved by technology

Therefore, the joint structure at the upper end of the B-pillar will have four-layer welding of the side wall outer panel, B-pillar reinforcement panel, upper side sill inner panel, and B-pillar inner panel, which is prone to solder joint defects.

However, in order to avoid four-layer welding, the common method is to dig a gap at the root of the rounded corner of the T-shaped B-pillar inner panel to avoid solder joints and form three-layer welding. Although the problem of virtual welding of four-layer welding has been solved, but Because the gap is dug at the rounded corner of the door frame, stress concentration occurs and there is a risk of cracking

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