A high-efficiency and long-life hydraulic valve main hole machining method

Abstract

The invention discloses an efficient and long-life hydraulic valve main hole machining method, which belongs to the technical field of hole machining. In the processing method of the present invention, three knives of oil port three-blade forming knife, three-blade reamer and eight-blade reaming knife are used in turn to complete the processing of the main hole of the hydraulic valve, and the oil port three-blade forming knife ensures the forming of the forming hole at one time. , long service life and high cutting efficiency; the use of the unequal design of the three-blade reaming knife and the layered structure design reduces the vibration of reaming cutting, and the reaming machining allowance is large, which ensures the concentricity of the main hole of the intermittent hydraulic valve. High precision, high machining efficiency and high machining efficiency; the use of the unequal division of the eight-blade expanding reamer combined with the unequal tooth design greatly reduces the tool vibration of the expanding reaming process, improves the surface roughness and cylindricity of the main hole of the hydraulic valve, and Reaming machining allowance and cutting efficiency; it has the advantages of high machining efficiency, good machining accuracy and long tool life, and effectively solves the problem of scrap residue blocking the hole and causing the hydraulic valve to be scrapped.

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 concentricity of the main hole of the hydraulic valve, and the machining accuracy and efficiency are high, and the chips are small chips, which effectively solves the problem of chip residue blocking the channel; the unequal division of the eight-edged reamer combined with the unequal tooth design greatly reduces The tool vibration of reaming processing is reduced, which not only improves the surface roughness and cylindricity of the main hole of the hydraulic valve, but also improves the machining allowance and cutting efficiency of the reaming hole, which meets the needs of intermittent and efficient finishing of the main hole of the hydraulic valve; It has the advantages of high processing efficiency, good processing accuracy and long tool life, and fully considers the problem of chip cleaning, effectively solving the problem of chip residue blocking the hole and causing the hydraulic valve to be scrapped, and can realize deep holes with 8 to 15 times the diameter efficient processing

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