Method for installing and locating bodywork cavity

Abstract

The invention relates to a method for installing and locating a bodywork cavity, aiming at effectively solving the problem of location when the bodywork cavity is installed. The method has the technical scheme that the tail end of a preposed welding part of the bodywork cavity is provided with a boss, and the boss is used for transverse location when a post-positioned welding part of the bodywork cavity is welded with the preposed welding part.

Description

technical field [0001] The invention relates to a method for installing and positioning a vehicle body cavity. Background technique [0002] In the early design process of the car body, in order to enhance the stiffness and deflection of a certain part, prevent the structural deformation of this area and affect the performance of the whole vehicle, it will be designed as a cavity structure to meet the strength and collision requirements of the car body. However, considering the overall vehicle shape design and the space constraints of the assembly parts, the opening size of the cavity structure is often small, generally between 30mm-70mm, which makes it impossible to add a clamp positioning mechanism for positioning in the cavity. [0003] In the prior art, there are mainly two ways to install the body cavity: [0004] One, such as figure 1 As shown, the opening size of the rear floor cavity of the car body is 58.8mm, and the X positive direction (horizontal) positioning i...

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Problems solved by technology

[0004] One, such as figure 1 As shown, the opening size of the rear floor cavity of the car body is 58.8mm, and the X positive direction (horizontal) positioning is not considered at the overlap of the rear floor front beam assembly of the previous weldment and the rear floor assembly of the subsequent weldment, resulting in two When mating, the consistency of the middle and rear bottom plate assembly in the positive X direction is poor, which makes the installation point on the part deviate greatly, and the relative position of the mating cannot be guaranteed, and the overlapping edge is reduced, resulting in a half point of welding, which affects the accuracy and welding quality of the body.

[0005] Two, such as figure 2 As shown, the opening size of the engine compartment cavity of the vehicle body is 33.5 mm. Considering the X-direction positioning problem, a flanging structure is designed at the lap joint for self-positioning. The front windshield beam upper cover assembly of the welded parts is relatively long (about 1322mm in length), and the material thickness is small (0.7mm), which makes the rebound of the stamping parts unavoidable, resulting in X Self-positioning in one direction fails, resulting in poor consistency in X-direction and Z-direction accuracy of related installation points, affecting the assembly of the front windshield and gutter, and there is a risk of uneven fit and water leakage

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