Process holes for back-end procedures in flat-shape covering part stamping production and locating method

Abstract

The invention discloses process holes for back-end procedures in flat-shape covering part stamping production. Each process hole is in a periphery rounded equilateral triangle shape, and the size of each process hole is internally tangent to a circle of phi 3-phi 6. The process holes are used for part precise locating in procedures after trimming and punching and are formed in a supplement part of a drawing process. The number of the process holes is larger than or equal to 2. The invention discloses a locating method of a flat-shape covering part after trimming at the same time. According to the process holes for the back-end procedures in flat-shape covering part stamping production, it is guaranteed that the flat-shape covering part, an automobile engine hood outer plate, is fast and accurately located; locating precision is high; stamping production operation is convenient; product consistency is good; production efficiency is high; product quality is stable; and the product percent of pass is high.

Description

technical field [0001] The invention belongs to the field of manufacturing automobile body parts, and in particular relates to a process hole and a positioning method for a post-process stamping production of a flat-shaped cover. Background technique [0002] The inner and outer panel assembly of the automobile engine cover is generally composed of an outer panel and an inner panel. The inner panel plays a role in enhancing rigidity. As an appearance part, the surface quality of the outer panel is required to be high. Compared with general stamping parts, the outer plate of the automobile engine cover is thin, the surface quality requirements are high, and the coordination of the matching parts is high. [0003] The stamping process of most automobile engine cover outer panels is divided into 4 steps. The first two steps are drawing, trimming and punching, and the latter two processes are mainly flanging and side flanging. figure 1 It is the outer plate of the automobile en...

AI Technical Summary

Problems solved by technology

However, the positioning of the shape of the sheet (part) by the peripheral locator will have the problem of unstable positioning

When stamping, the binder plate goes down, and the binder plate touches the sheet first. Due to the unbalanced force, the parts are always in motion in the front, rear, left and right directions. The exact position of the parts cannot be guaranteed during the stamping process, and the stamping in mass production cannot be guaranteed. The consistency and repeatability of the parts, it is very easy to have the situation that the product quality is unqualified or scrapped, and it cannot meet the quality requirements of mass production

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