氮化硅生坯球自动模压机脱模技术改进  

Improvement on Demoulding Technology for Silicon Nitride Green Balls on Automatic Moulding Press

作　　者：徐振宇[1,2,3] 于琦 张永乾[1,2,3] 马越 万磊[1,2,3] XU Zhenyu;YU Qi;ZHANG Yongqian;MA Yue;WAN Lei(Luoyang Bearing Research Institute Co., Ltd., Luoyang 471039,China;Henan Key Laboratory of High Performance Bearing Technology, Luoyang 471039,China;China International Science and Technology Cooperation Base for Digitization Design of High Performance Bearing, Luoyang 471039,China)

机构地区：[1]洛阳轴承研究所有限公司,河南洛阳471039 [2]河南省高性能轴承技术重点实验室,河南洛阳471039 [3]高性能轴承数字化设计国家国际科技合作基地,河南洛阳471039

出　　处：《轴承》2020年第6期22-24,共3页Bearing

摘　　要：氮化硅球采用陶瓷粉末模压成形工艺进行压制,自动模压机成形过程中存在球坯脱模困难,难以推出模腔,球坯废品率高等问题,限制了模具冲头数量和产量的提高。通过创新设计,改进了压机下凸轮结构,在脱模阶段可将球坯轻微弹离阴模,便于料靴推出,解决了球坯脱模困难的问题,实现了氮化硅球的多冲头压制。The silicon nitride balls are pressed by ceramic powder mould forming process.During forming process by automatic moulding press,it is difficult for demoulding of green bodies and extrusion from moulding cavity,and the rejection rate of green bodies is high,limiting number of mould punch and increase of output.Through innovative design,the lower cam structure of press is improved.The green bodies are slightly ejected from female mould during demoulding stage,so that the material boots are easily pushed out.The difficult demoulding of green bodies is solved,and the multi-punch pressing of silicon nitride balls is realized.

关 键 词：滚动轴承 氮化硅陶瓷 模压成形 脱模 冲头 凸轮 

分 类 号：TH133.33[机械工程—机械制造及自动化] TP202[自动化与计算机技术—检测技术与自动化装置]