Hydraulic breaking hammer change-over valve and manufacturing method thereof

Abstract

The invention discloses a hydraulic pressure breaking hammer selector valve and a manufacturing method thereof in the technical field of hydraulic components. The hydraulic breaking hammer selector valve takes a middle cylinder body as a valve body; a valve opening is formed on the valve body; an oil duct is communicated with the inner wall of the valve hole and led to a cylinder of the middle cylinder body; a valve jacket is arranged in the valve hole and matched with the valve hole; a valve plug is arranged in the valve jacket; and a valve cover is arranged on the end part of the valve hole. The selector valve is characterized in that the valve hole is an unthreaded hole; an annular groove is formed on the outer wall of the valve jacket corresponding to the position of an opening of the oil duct; and an oil hole communicates the annular groove with a centre hole of the valve jacket. The manufacturing method comprises the steps of processing the valve hole, the valve jacket, the valve plug and the valve cover; conducting heat treatment; and assembling finished products. The method of the hydraulic pressure breaking hammer selector valve has the advantages of processing conveniently, reducing processing difficulty and effectively ensuring precision. The selector valve has the advantages of high functional reliability, lower processing cost and suitability for batch production.

Description

technical field [0001] The invention belongs to the technical field of hydraulic components, and in particular relates to a hydraulic breaker reversing valve and a manufacturing method thereof. Background technique [0002] At present, the hydraulic breaker sold on the market widely adopts the reversing valve device. The valve seat of this reversing valve is processed on the middle cylinder body, and the method of processing grooves in the valve hole of the middle cylinder body is used to realize the connection of the relevant oil circuit. Connected, which increases the difficulty of processing, and its processing accuracy cannot be guaranteed. In addition, the valve seat hole on the middle cylinder needs to be processed by grinding. Due to the heavy weight and large eccentricity of the work, general machining equipment cannot be processed. Some foreign manufacturers' eccentric grinding machines can meet the requirements, but only a single machine The cost of the eccentric ...

AI Technical Summary

Problems solved by technology

[0002] At present, the hydraulic breaker sold on the market widely adopts the reversing valve device. The valve seat of this reversing valve is processed on the middle cylinder body, and the method of processing grooves in the valve hole of the middle cylinder body is used to realize the connection of the relevant oil circuit. connected, which increases the difficulty of processing, and its processing accuracy cannot be guaranteed

In addition, the valve seat hole on the middle cylinder needs to be processed by grinding. Due to the heavy weight and large eccentricity of the work, general machining equipment cannot be processed. Some foreign manufacturers' eccentric grinding machines can meet the requirements, but only a single machine The cost of the eccentric grinder is nearly 5-6 million RMB, the production cost is high, the clamping is inconvenient, the scrap rate is high, and the processing efficiency is low

Images