工程机械铸造多路阀阀体加工技术探究

Study on Machining Technology of Casting Multi-way Valve Body for Construction Machinery

铸造多路阀是工程机械的核心控制元件,主要零件之一是铸造阀体。而铸造阀体的加工质量是关键要素,直接影响液压多路阀工作性能及使用寿命。该文指出了铸造阀体加工的重要性,然后根据探索及验证,提出了几种比较成熟的铸造阀体加工技术,主要有阀芯孔多台阶沉割槽同步切削技术、片式阀体片间配合面以铣代磨技术、超深小直径流道机加工技术、成套化插装阀孔加工及检测技术、大直径长倍径阀芯孔珩铰技术、粗加工过程毛刺预防技术、热能去毛刺技术、阀孔单刃镗铰刀精密加工技术、阀孔防变形余量控制技术。

Casting multi-way valve is the core control element of hydraulic system of construction machinery, one of the primary parts is casting valve body.And the machining quality of casting valve body is key elements, directly affecting the working performance and service life of casting multi-way valve. This paper firstly points out the importance of casting valve body processing, then according to the exploration and verification, several mature casting valve body processing techniques are proposed. There are mainly synchronized cutting technology of multi-step cutting slot for valve core hole, milling technology for the fit surface between piece body replacing grinding technology, ultra-deep and small diameter flow processing technology, machining and testing technology for complete cartridge of valve hole, large diameter and long multiply ratio honing technology, prevention technology of burr during rough processing, thermal deburr technology, precision machining technology of valve hole single edge boring hinge cutter, control technology of anti-deformation margin of valve hole.