Diesel engine cylinder cover valve seat conical surface jumping special gauge

Abstract

The invention discloses a diesel engine cylinder cover valve seat conical surface jumping special gauge which comprises a dial test indicator, a dial sleeve, a threaded pin, a plug, a steel ball, a core rod and a locking pin. The lower part of the core rod is vertically fixed in an air valve guide tube. The plug is fixed at the middle part of a dial sleeve inner hole. The thread pin passes through the dial sleeve and is in clearance fit with the dial sleeve. A head at one end of the threaded pin is fixedly connected with the dial test indicator. An axial line of the locking pin is vertically intersected with an axial line of the threaded pin. A head at one end of the locking pin presses against the periphery of the threaded pin. The steel ball is arranged at the center of a head at upper end of the core rod. The lower end of the dial sleeve is sleeved on the upper end of the core rod. The lower side of the plug presses against the steel ball. The dial sleeve and the dial test indicator are supported at the upper end of the core rod through the steel ball. A head of a dial test indicator contact pin presses against a ship diesel engine valve seat conical surface. The diesel engine cylinder cover valve seat conical surface jumping special gauge has the advantages of compact structure, convenient use, low manufacturing cost, improvement of measurement efficiency, satisfaction of the detection requirements of a batch of products in a production field, and the reduction of the detection cost.

Description

technical field [0001] The invention relates to a position deviation inspection device for a tapered hole of a machined part, in particular to a special tool for detecting the runout of a cone surface of a valve seat of a cylinder head, and belongs to the technical field of machined parts detection. Background technique [0002] The cylinder head is the main key part of the diesel engine. Its processing accuracy has a great influence on the working quality of the diesel engine, especially the relative position accuracy of the valve seat cone surface and the valve guide, which directly affects the performance of the diesel engine. For example, a certain type of marine diesel engine cylinder head The beating tolerance of the valve seat cone to the air valve guide hole must be within the range of 0.02mm, and the position tolerance requirement is very high. Therefore, the machining process of the cone surface of the cylinder head valve seat must be strictly controlled, and the ...

AI Technical Summary

Problems solved by technology

The commonly used detection method is to use a three-coordinate measuring instrument to detect the beating deviation of the valve seat cone surface of the diesel engine cylinder head on the valve guide hole, but the three-coordinate measuring instrument takes a long time to detect and the cost is high, so it is not suitable for mass production at the production site. to test

Images