Cover of gas exhaust tube tail gas treatment device and stamping mould of cover

Abstract

The invention discloses a cover of a gas exhaust tail gas treatment device, wherein a cover body is in the shape of a cup; the inner side edge of the cover body is provided with a sunken pit; the outer side edge of the cover body is provided with an extension part; and the extension part is downwards extended, and is in the shape of a step. The invention further discloses a stamping mould of the cover of the gas exhaust tube tail gas treatment device, wherein the upper end surface of the lower mould base is provided with a molding piece; the molding piece surrounds a top block; the upper end of the inner side of the molding piece is provided with a piece slot; the piece slot is in the shape of a step; the lower end of the outer side of an upper molding block is provided with a molding block slot matched with the piece slot in shape; after mould closing, a predetermined gap is formed between the piece slot and the molding block slot, and a predetermined gap is formed between the upper molding block and the top block. According to the cover, once the extension part is additionally arranged, the cover is subjected to stamping by many times while the thickness and the curvature of the cover are controllable, so that stress of the cover is guaranteed; and the step-shaped extension part is arranged for increasing the contact area between the cover and the tail gas treatment device, so that the cover and the gas exhaust tube tail gas treatment device can be locked better.

Description

technical field [0001] The invention relates to a part of a tail gas treatment device of an automobile exhaust pipe and a mold for stamping the part, in particular to a cover of the tail gas treatment device of an exhaust pipe and a stamping die thereof. Background technique [0002] The automobile exhaust pipe is installed in the exhaust pipe between the engine exhaust branch pipe and the muffler, so that the entire exhaust system is flexibly connected, so as to reduce vibration and noise, facilitate installation and prolong the life of the exhaust muffler system. effect. It is mainly used for light vehicles, miniature vehicles and passenger cars. Its structure is that the double-layer bellows is covered with steel wire mesh sleeves, and the straight edge sections at both ends are covered with snap rings. In order to make the noise reduction effect better, the bellows can be equipped with telescopic knot or netting. In order to reduce the discharge of exhaust gas, the exh...

AI Technical Summary

Problems solved by technology

At present, the stress of the cover used to fix the exhaust gas treatment device and the exhaust pipe is not uniform, and the fastening effect is poor

Images