A hydraulic valve plunger grinding positioning fixture

Abstract

The invention discloses a hydraulic valve plunger abrasive machining positioning fixture, and belongs to the technical field of abrasive machining devices. The hydraulic valve plunger abrasive machining positioning fixture comprises a fixture base, a left tip, a workpiece positioning sleeve, a right tip, an indexing plate and an indexing plate positioning mechanism. The fixture base is of a U-shaped structure. The left tip is fixedly installed on the left side wall of the opening end of the fixture base, and the right tip capable of moving leftwards and rightwards is installed on the right side wall of the opening end of the fixture base. The left tip and the right tip are located on the same central axis. The workpiece positioning sleeve is installed at the left end of the plunger workpiece and matched with the left tip. The indexing plate is sleeved with a large circular hole of the plunger workpiece. The indexing plate positioning mechanism is installed on a base body of the fixture base of the U-shaped structure and matched with the indexing plate. By means of the hydraulic valve plunger abrasive machining positioning fixture, the plunger workpiece is accurately positioned, the machining quality of the plunger workpiece is ensured, the switching of grinding positions of the plunger workpiece can be rapidly completed, and the work efficiency is improved.

Description

technical field [0001] The invention relates to a positioning fixture, in particular to a positioning fixture suitable for grinding a hydraulic valve plunger, and belongs to the technical field of grinding processing devices. Background technique [0002] The working principle of the hydraulic valve is to use the cooperation of the plunger and the valve body to make the oil circuit connect, disconnect or change the flow direction of the hydraulic oil, so as to realize the start, stop or change the movement direction of the hydraulic actuator and its driving mechanism. At present, there are many types of hydraulic valves, and the plunger structures are also various, such as attached figure 1 , figure 2 A hydraulic valve plunger 1 shown has a large circular hole 1-2 perpendicular to the central axis of the plunger at one end, and two sets of cylinders 1-1 matched with the valve body in the middle. A group of inclined plunger working surfaces 1-1-1 are set at both ends of th...

AI Technical Summary

Problems solved by technology

At present, there are many types of hydraulic valves, and the plunger structures are also various, such as attached figure 1 , figure 2 A hydraulic valve plunger 1 shown has a large circular hole 1-2 perpendicular to the central axis of the plunger at one end, and two sets of cylinders 1-1 matched with the valve body in the middle. A set of inclined plunger working surfaces 1-1-1 are set at both ends of the cylindrical body 1-1 at intervals along the circumference of the outer cylindrical surface, and the plunger 1 cooperates with the valve body through the plunger working surfaces 1-1-1 to realize alignment. For the control of hydraulic oil flow, due to the high machining accuracy requirements of the plunger working surface 1-1-1, when grinding the plunger working surface 1-1-1, the method of cooperating with positioning fixtures and optical instruments is generally used Realize the precise positioning of the plunger workpiece, so there are defects such as workpiece clamping positioning and 1-1-1 switching operation steps of different plunger working surfaces, and low work efficiency

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