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我厂用M4215型立式珩磨机来珩磨气缸套的最后一道工序。这珩磨机是60年代的机床,在使用中存在如下问题:1)靠手拧紧螺母夹紧工件,操作不便,效率低。2)M4215型珩磨机的制动部分采用速度继电器,使用时常失灵,不能可靠制动而擦伤工件。同时安装位置2m多高,维修很不方 相似文献
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1 INTRODUCTION There are lots of traditional processes for fin heat sinks(FHS) , such as cold-extruding, weld- ing,cold-rolling and cold-forging. The cold-extru- ding process calls for strict requirements for the molds because the deformation press is very big and the machined fins are usually too thick. The welding process is complex and costly ,but not re- liable ,because the welding line is dampenedin the application,andit s easy to be damaged when two different metals electrolyze in … 相似文献
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