Automatic clamping device for grinding of pin hole of tappet high-pressure oil pump

Abstract

The invention discloses an automatic clamping device for the grinding of the pin hole of the tappet of a high-pressure oil pump and belongs to the technical field of clamping devices. The automatic clamping device comprises a positioning disc, a clamping block and a positioning block, wherein the clamping block and the positioning block are oppositely arranged on the positioning disc, and the clamping block can move relative to the positioning block; and the pressing surface of the positioning block is provided with a telescopic positioning pin. With the automatic clamping device of the invention adopted, the perpendicularity of the pin hole relative to an outer periphery is guaranteed; the perpendicularity of an assembled roller bearing after is guaranteed; the quality of the tappet of the oil pump is improved; and the service life of an engine is greatly prolonged.

Description

technical field [0001] The invention relates to the technical field of clamping devices, in particular to an automatic clamping device for grinding tappet pin holes of a high-pressure oil pump. Background technique [0002] The oil pump tappet is an important part of an automobile engine that uses a high-pressure oil pump system. It is installed between the drive cam and the tappet, and converts the rotational motion of the drive cam into a linear reciprocating motion while pushing the tappet to move. The main structure includes guide sleeves, Brackets, roller bearings and pins. [0003] For a long time, the pin hole on the guide sleeve is no longer machined after punching, but when the roller tappet is assembled, the guide sleeve will be heat treated and ground first. However, during the grinding process of the guide sleeve, since the guide sleeve has just completed heat treatment, the guide sleeve is prone to deformation during the grinding process, so that after the oute...

AI Technical Summary

Problems solved by technology

However, during the grinding process of the guide sleeve, since the guide sleeve has just completed heat treatment, the guide sleeve is prone to deformation during the grinding process, so that after the outer circle of the guide sleeve is ground, the pin holes on the guide sleeve are perpendicular to the outer circle. The proportion of unqualified degree increases, which makes the verticality of the roller bearing unqualified after assembly. Therefore, it is necessary to check all the roller tappets after the assembly of the roller bearing is completed, so as to eliminate unqualified products (about 20% ), if the unqualified roller tappets are directly installed and used, the bearings on the roller tappets will be eccentrically worn, and eventually the life of the engine will be greatly reduced

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