摘要
微小零件的大批量和高效率生产可采用微冲裁加工技术,但凸模、凹模及薄板工件在冲裁加工时均受到冲裁力作用。为研究凸模底部刃口形状对微冲裁过程的影响,利用自研的微细电火花-微冲裁一体式加工机床,采用微细电火花三维铣削、线电极放电磨削和微细电火花反拷贝加工技术,在线加工具有凹形底部刃口的凸模,并实现凹凸模具的精确对准;利用在线制备的底部平面刃口和底部凹形刃口凸模,成功地在304不锈钢箔料上冲裁出大尺寸异形复杂截面形状的微型落料和冲孔件。结果表明:采用底部凹形刃口凸模冲裁可显著降低冲裁力,且能获得更高质量的落料件和冲孔件。
Micro blanking is suitable for mass production of micro parts efficiently.In the process of blanking,punch,die and sheet work are all affected by blanking force.In order to study the influence of blanking cutting-edge shape on micro blanking process,a self-developed micro electrical discharge machining(EDM)micro blanking machine tool is used in this study.The punch with concave cutting-edge is machined online by using 3D micro EDM milling,electrical discharge grinding and micro EDM reverse copy machining techniques.The accurate alignment of punch and die is achieved.Using the punch with flat cutting-edge and concave cutting-edge made online,micro blanking and punching parts with irregular complex cross sectional shape were successfully generated on 304 stainless steel foil.The relationship between blanking force and time indicates that the blanking force has been significantly reduced by using concave cutting-edge,and better quality blanking parts and punching parts have been obtained.
作者
马腾
杨君峰
余祖元
李国栋
夏恒
MA Teng;YANG Junfeng;YU Zuyuan;LI Guodong;XIA Heng(School of Mechanical Engineering,Dalian University of Technology,Dalian 116024,China;Department of Mechanical Systems Engineering,Tokyo University of Agriculture and Technology,Tokyo 184-8588,Japan)
出处
《电加工与模具》
2022年第3期20-25,共6页
Electromachining & Mould
基金
国家自然科学基金项目(91860134)
国家科技重大专项(2017-VII-0004-0097)。
