Method for forming external slide rail of seat of automobile, formation mandrel, concave die and convex die

Abstract

The invention discloses a method for forming an external slide rail of a seat of an automobile, which comprises the following steps: (1) putting a workpiece which is already finished in the prior procedure and is to be processed into a special formation concave die; (2) inserting a formation mandrel into an internal cavity of the workpiece which is already finished in the prior procedure and is to be processed; (3) descending a convex die along with a slide block of a punch and punching a workpiece group which is integrally assembled by the workpiece to be processed, the formation mandrel, the concave die and the like, is placed on a support seat and is to be processed; (4) punching and forming the workpiece to be processed after positioning the convex die, wherein the punching shape of the workpiece to be processed is formed by the support of the formation mandrel and the concave die and the extrusion of the convex die; (5) pulling out the convex die; and (6) pulling out the formation mandrel and obtaining a finished product with finished processing. The invention also provides a formation mandrel, a concave die and a convex die which are used for the method. The key of the invention lies in that the formation mandrel is inserted into the workpiece to be processed, then punching processing is carried out, punching force can be completely loaded on the workpiece, and the full and accurate formation of the workpiece is ensured.

Description

technical field [0001] The invention relates to a molding method for an outer slide rail of an automobile seat. The invention also provides a molding mandrel used in the method, a die, a punch, and a floating guide block used in the molding method. Background technique [0002] In the production of car seats, the forming of the outer slide rail is a difficult point in the production process. For an illustration of this outer slide rail forming method, see figure 1 , figure 2 . in, figure 1 It is an isometric view of the machined part after the previous process is completed, figure 2 It is the part drawing of the outer slide rail parts after final molding. It can be seen that the forming process actually requires the parts in the previous process to be properly extruded, mainly to form two bends on the upper part of the outer slide rail part. The outer slide rail is made of thin metal plate and has certain elasticity. [0003] In the prior art, punching and die stamp...

AI Technical Summary

Problems solved by technology

The disadvantage of this processing method is that there are strict requirements on the material mechanics indicators such as the tensile strength and yield strength of the material.

[0006] In addition, in the above-mentioned prior art, it is difficult to realize the forming of the fillet at the upper part of the workpiece

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