Combination die for machining filter casing assembly block

Abstract

The invention relates to a combination die for machining a filter casing assembly block. The combination die comprises a reverse die, a pre-stretching die and a forming die, wherein the reverse die comprises a first lower die body and a first upper die body which are matched with each other; the pre-stretching die comprises a second lower die body and a second upper die body which are matched with each other; the forming die comprises a third lower die body and a third upper die body which are matched with each other. The combination die has the advantages as follows: the bottom of a casing is reversely stretched through the reverse die, then the reversely stretched casing is pre-stretched forward through the pre-stretching die, and finally, the assembly block is stretched and formed through the forming die; the assembly block is sufficiently deformed after three times of stretching by means of the device, and deformation of a filter casing is avoided when the assembly block is formed; a common wrench is used when the filter casing is assembled, operation is convenient, and the service life of the filter casing is prolonged through three times of stretching.

Description

technical field [0001] The invention relates to a processing device for a filter threaded cover plate, in particular to a combined mold for processing an assembly block of a filter shell. Background technique [0002] The air filter is located in the engine intake system, and it is an assembly composed of one or several filter components that clean the air. Its main function is to filter out harmful impurities in the air that will enter the cylinder, so as to reduce the early wear of the cylinder, piston, piston ring, valve and valve seat. The engine has three types of filters: air, oil, and hydraulic, generally referred to as "three filters". They are respectively responsible for the filtration of the medium in the engine intake system, lubrication system and combustion system. [0003] The filter housing is an important part of the filter. At present, when assembling and maintaining the filter, special pliers are needed to install or remove the filter housing. Due to the...

AI Technical Summary

Problems solved by technology

[0003] The filter housing is an important part of the filter. At present, when assembling and maintaining the filter, special pliers are needed to install or remove the filter housing. Due to the large size of the special pliers, It is not very convenient to use. At present, there is also a nut welded on the top of the filter shell, and then use a wrench to operate, but this method has the following disadvantages: because the filter shell is relatively thin, it is easy to remove the filter when welding the nut. The shell breaks down, the scrap rate is high, and the processing is difficult. After a long time, the weld is easy to rust, which reduces the welding strength between the shell and the nut.

Images