Efficient and long-service-life hydraulic valve main hole machining method

Abstract

The invention discloses an efficient and long-service-life hydraulic valve main hole machining method, and belongs to the hole machining technology field. In the machining method, an oil port three-blade forming cutter, a three-blade chambering cutter and an eight-blade expanding reamer are sequentially used for machining a main hole of a hydraulic valve. One-time forming of a forming hole is guaranteed through the oil port three-blade forming cutter, a service life is long, and cutting efficiency is high. An unequal design of the three-blade chambering cutter is matched with a layered structure design so that chambering cutting vibration is reduced, a chambering machining allowance is large, concentricity of the main hole of an intermittent hydraulic valve is ensured, and machining precision and machining efficiency are high. Unequal parts of the eight-blade expanding reamer are combined with unequal teeth so that vibration of a cutter of expanding and reaming is greatly reduced, andsurface roughness and cylindricity of the main hole of the hydraulic valve, the reaming processing allowance and the cutting efficiency are improved; and the method has the advantages of high machining efficiency, good machining precision, a long service life of the cutter and the like, and a problem that hydraulic valves are scrapped due to blockage of ducts by residual cuttings is effectively solved.

Description

technical field [0001] The invention relates to a processing method for a hydraulic valve hole, more specifically, to a high-efficiency and long-life hydraulic valve main hole processing method. Background technique [0002] Hydraulic valves are key parts in hydraulic machinery, such as figure 1 As shown, the valve body 100 of the hydraulic valve has a main valve hole 101 and many interconnected oil passages 102. These oil passages 102 communicate with the main valve hole 101, and the corresponding hydraulic pressure is formed through the adjustment of the spool in the main valve hole 101. The machining accuracy of valve channels and these valve holes directly affects the product performance and service life of hydraulic valves. In the hydraulic valve, the main hole of the hydraulic valve has the highest precision requirements. The main technical indicators of the main valve hole are the surface roughness of the oil port Ra≤1.6, and the cylindricity of the main valve hole≤0...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the disadvantages of low processing efficiency, poor processing accuracy and short tool life in existing hydraulic valve main hole processing, and provide a high-efficiency, high-life hydraulic valve main hole processing method, using the technical solution of the present invention , using the stepped design of the three-blade forming knife for the oil port, it ensures the forming hole is formed at one time, the concentricity of the processed oil port is better, the surface finish is high, and the service life and cutting efficiency of the three-blade forming knife for the oil port are high; the use of three-blade The unequal design of the reaming knife combined with the layered structure design, on the one hand, reduces the vibration of reaming cutting, and can perform reaming processing with high efficiency and large metal removal volume; on the other hand, it has a very good cutting guiding effect, ensuring intermittent The c

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