Vehicle front fingerboard and forming method thereof

Abstract

The invention provides a vehicle front fingerboard which comprises an upper front fingerboard and a lower front fingerboard welded with the upper front fingerboard, wherein the upper front fingerboard and the lower front fingerboard are in an integral hollow pipe structure and both have an integral closed rectangular section. The invention also provides a forming method of the vehicle front fingerboard, which comprises the following steps of: firstly, forming an upper front fingerboard and a lower front fingerboard by an internal high-pressure liquid-filling forming method respectively; and then, welding the formed upper front fingerboard and lower front fingerboard together to obtain the vehicle front fingerboard. In the vehicle front fingerboard provided by the invention, parts are reduced and lightened, the mould cost is lowered, and light weight of a vehicle is realized; the strength, rigidity and fatigue strength of the parts are improved, and the service life is prolonged; the processing precision is improved, and the assembly error is reduced; and the production flow is simplified, and the production efficiency is improved.

Description

technical field [0001] The invention relates to a vehicle engine room front finger beam and a forming method thereof, in particular to an automobile tubular front finger beam and an internal high-pressure liquid-filled forming method of the automobile tubular front finger beam, belonging to the technical field of automobiles. Background technique [0002] At present, the front finger beams at both ends of the traditional automobile cabin adopt a welded structure of sheet metal parts during design. Such as figure 1 As shown, the front finger beam of this type of car is mostly used in the design of the longitudinal beam of the car body. The front finger beam is welded in two single pieces, while the traditional upper front finger beam and the lower front finger beam are made by butting two U-shaped sheet metal parts and combining them with MIG welding, such as figure 2 The cross-sectional structure shown is a rectangular structure formed by butting two U-shaped sheet metal ...

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problems of large number of parts, heavy weight, high mold cost, low stiffness and strength, poor assembly precision and poor surface quality caused by the U-shaped sheet metal welding structure of the automobile front finger beam in the above-mentioned prior art, this paper The invention provides a vehicle front finger rail, the upper front finger rail and the lower front finger rail are both made of a hollow tube with a closed rectangular structure in section, which simplifies the structure on both sides of the engine room, and has high strength and anti-torsion ability Strong, long service life and other advantages

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