Preparation method of inner container of automobile tail pipe

Abstract

The invention relates to a preparation method of an inner container of an automobile tail pipe. The preparation method comprises the following preparation steps of firstly, shearing raw material of the stainless steel inner container according to the size of the finished product of the inner container of the automobile tail pipe, arranging extending blocks at the two ends of the raw material of the stainless steel inner container along the length direction of the finished product of the inner container, and forming positioning holes in the extending blocks; arranging the raw material in a drawing die, wherein the drawing die comprises an upper concave die assembly and a lower convex die, and a positioning rod is arranged on the lower convex die; respectively sheathing the positioning holes of the two ends of the sheared raw material of the stainless steel inner container onto the positioning rod on the lower convex die, so as to position the raw material of the stainless steel inner container; then, combining the upper concave die assembly and the lower convex die of the drawing die, and pressing and forming the raw material of the stainless steel inner container, so as to obtain the finished product of the inner container; fetching the finished product, and cutting the extending blocks at the positioning holes of the two ends. The preparation method has the advantages that the arrangement of excessive cutting edges is not needed, the material is saved, the technology is simple, and only one set of drawing die is used.

Description

technical field [0001] The invention relates to the technical field of an automobile tail pipe liner, in particular to a preparation method of an automobile tail pipe liner. Background technique [0002] The automobile exhaust system is located at the bottom of the vehicle, connecting the engine outlet and the atmosphere. Its main function is to discharge the exhaust gas generated by the engine, purify the exhaust gas, and reduce noise. The exhaust tail pipe is located at the tail end of the engine exhaust pipe, which plays the role of exhaust exhaust and decoration. The engine exhaust tailpipe is usually connected directly after the exhaust connection pipe and the muffler at the outlet of the engine, and is partially visible. In the prior art, the exhaust tailpipe generally includes an outer shell and an inner tank, and the inner tank is arranged in the outer shell, and the two are generally welded and fixed by an additional connecting piece or a welding plate. [0003] T...

AI Technical Summary

Problems solved by technology

In order to achieve the purpose of pre-pressing the edge block around the inner container before drawing, the raw material of the inner container must be provided with redundant edge edges around the edges of the raw materials required for a complete finished product for the edge block to be pressed tightly; therefore, the production A complete liner needs to be stretched first, and then after the stretching is completed, the finished product is trimmed one by one to remove the four excess calendered edges to obtain the final product; since the formed liner is in the middle Arched 3D product (attached Image 6 As shown), the trimming process is very difficult and difficult to operate, and it is easy to leave a cut, causing damage to the mechanical properties of the entire product; and the trimming mold is also prone to wear, reducing the service life and increasing the mold input cost; In addition, The trimmed material can no longer be used, which not only causes waste of materials, but also complicated and cumbersome process, and multiple mold settings

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