机床与液压
機床與液壓
궤상여액압
MACHINE TOOL & HYDRAULICS
2014年
22期
72-75
,共4页
高压油管%球头%瓣合凹模%挤压%夹具
高壓油管%毬頭%瓣閤凹模%擠壓%夾具
고압유관%구두%판합요모%제압%협구
High pressure oil tube%Ball head%Flap together cavity mold%Extrusion%Fixture
超高压手动液压泵的工作油压高达300 MPa，其上的一根油管长度大、管径小、管壁薄，与其联接零件间的密封完全靠油管两端的凸球面与联接零件的凹球面间良好接触和压紧来实现，对油管两端的凸球面尺寸、形状精度要求很高。冷挤压时需严格控制管坯被压缩的量，而压力机的行程又是不可调也不可控的。将挤压模具及夹具结合在一起，解决了高压油管两端球头及反锥面冷挤压过程中的一切问题。
超高壓手動液壓泵的工作油壓高達300 MPa，其上的一根油管長度大、管徑小、管壁薄，與其聯接零件間的密封完全靠油管兩耑的凸毬麵與聯接零件的凹毬麵間良好接觸和壓緊來實現，對油管兩耑的凸毬麵呎吋、形狀精度要求很高。冷擠壓時需嚴格控製管坯被壓縮的量，而壓力機的行程又是不可調也不可控的。將擠壓模具及夾具結閤在一起，解決瞭高壓油管兩耑毬頭及反錐麵冷擠壓過程中的一切問題。
초고압수동액압빙적공작유압고체300 MPa，기상적일근유관장도대、관경소、관벽박，여기련접령건간적밀봉완전고유관량단적철구면여련접령건적요구면간량호접촉화압긴래실현，대유관량단적철구면척촌、형상정도요구흔고。랭제압시수엄격공제관배피압축적량，이압력궤적행정우시불가조야불가공적。장제압모구급협구결합재일기，해결료고압유관량단구두급반추면랭제압과정중적일절문제。
The working oil pressure of super high pressure manual hydraulic pressure pump reaches 300 MPa. In this pump,one of oil tube has large length,small diameter and thin wall. The seal of this tube with link parts is entirely depended on good contact and compress of protruding sphere of oil tube at two ends and concave sphere of link parts,so requirements on size and shape precision of protruding sphere of oil tube at two ends are very high. The amount of compression of tube blank should be accurately controlled at cold extrusion,but the stroke of press can't be controlled and not adjusted. Using the advantages of extrusion die and fixture,all problems were well solved when high pressure oil tube ball heads at two ends and anti-tapered surface were extruded coldly.
