Binding-packaging process for triple purifier of automobile

Abstract

The invention discloses a seizing and packaging technology for three-way cleaner of automobile. Technology procedures are 1) drumming; 2) loading; 3) seizing; 4) necking and experiment for axial thrust; 5) welding; 6) sealing test. The invention is provided with following merits: 1, by seizing way the gap of catalyst converter shell is not important, according to the tolerance of carrier and by adjusting the seizing force the gap between the carrier and the catalyst converter is adjusted automatically so as to control the compression density of expansion gasket in 0.8-1.2g / cm3; 2, seizing force, which is a pair of soft force, arises from the lowest point to setting value to ensure the carrier stress evenly, meanwhile after the seizing is finished the vibration with certain amplitude generated makes stress concentration generated in seizing scatter evenly.

Description

technical field [0001] The invention relates to a packaging process for an automobile ternary purifier. Background technique [0002] The main technical requirement for the packaging of the automotive three-way purifier is to prevent the carrier from moving in the cylindrical catalyst shell, so a layer of expansion liner is wrapped on the carrier to fix the carrier, so that the carrier does not move in the catalytic converter shell. The main thing is to control the compression density of the expansion gasket between the carrier and the catalyst shell. If the compression density of the expansion gasket is too high, the carrier will break when it is packaged. On the contrary, if the compression density of the expansion gasket is too small, the carrier will be inside the catalyst casing. There will be looseness. After the car has been running for a period of time, the carrier will loosen and cause the carrier to break, causing the entire purifier to fail. Therefore, the packagi...

AI Technical Summary

Problems solved by technology

This process method has the following technical problems: 1. Since there is a certain tolerance in the manufacturing process of the catalytic converter housing, and the carrier also has a certain tolerance in the manufacturing process, if the upper deviation of the catalytic converter housing matches the lower deviation of the carrier, It will cause the compression density of the expansion gasket to be too small, causing the carrier to loosen; if the lower deviation of the catalyst shell matches the upper deviation of the carrier, the compression density of the expansion gasket will be too large, causing the carrier to break during packaging, so the process The tolerance requirements for the catalytic converter shell and carrier are quite high, and the optional method should be used for assembly during packaging to control the compression density of the expansion gasket. If you are not careful, it will cause the occurrence of packaging quality accidents.

2. This kind of packaging process uses a hydraulic press to press the carrier into the catalytic converter shell, resulting in uneven stress distribution and local stress concentration of the carrier in the catalytic converter shell, which may cause excessive local stress concentration during operation. carrier rupture

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