Heat shield anti-wrinkling stamping process

Abstract

The invention discloses a heat shield anti-wrinkling stamping process. The process comprises the following steps that (1) an inner metal layer, an outer metal layer and a middle heat insulation layer of a heat shield are sequentially combined and are subjected to drawing molding; (2) the inner metal layer, the outer metal layer and the middle heat insulation layer are subjected to edge trimming simultaneously; (3) the inner metal layer and the middle heat insulation layer are cut off by 4-8 mm simultaneously; (4) the inner metal layer, the outer metal layer and the middle heat insulation layer are combined, and the outer metal layer is folded to 90 degrees; (5) the inner metal layer, the outer metal layer and the middle heat insulation layer are combined, and the outer metal layer is subjected to buckling combination; (6) the edge of the outer metal layer and the edge of the middle heat insulation layer are leveled and overlapped into a whole; and (7) the edge of the buckled and combined heat shield is shaped into a pre-designed shape. By means of the process, the surface of the heat shield is smooth without wrinkles; the heat shield is good in heat insulation effect, easy to mount and good in integral rigidity, resonance between the heat shield and an engine is avoided, and the space of an engine cabin is saved.

Description

technical field [0001] The invention relates to a stamping process, in particular to a stamping process of an engine heat shield. Background technique [0002] The engine exhaust manifold and the heat shield of the catalytic converter, the heat shield structure is a sandwich structure, the inner and outer surfaces are two layers of metal structure, and the middle layer is ceramic fiber. The existing manufacturing process is to first wrap the metal layer with the ceramic fiber, and then press and form it to achieve the shape of the product. This process will produce a large number of wrinkles during the drawing and forming process of the material. In practical applications, due to long-term engine vibration, large temperature difference changes, poor ventilation and other harsh working conditions, the heat shield is very likely to be damaged. Cracks from the crease. [0003] Therefore, those skilled in the art are devoting themselves to developing a stamping process that ca...

AI Technical Summary

Problems solved by technology

This process will produce a large number of wrinkles during the drawing and forming process of the material. In practical applications, due to long-term engine vibration, large temperature difference changes, poor ventilation and other harsh working conditions, the heat shield is very likely to be damaged. Crack from the fold

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