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我厂在一台53轴双面组合钻床上加工后桥壳体的过程中,由于原来所用的夹具压紧不牢,容易造成工件倾斜,使钻孔成为椭圆形,有时甚至损坏钻头。《组合机床通讯》1974年第1期刊载的“介绍一种用双四连杆机构增力的气动夹具”一文指出,双四连杆夹紧机构的增力倍数在不考虑摩擦损失时高达20涪(目前所使用的各种增力机构,其增
I plant in a 53-axis double-sided combination drill on the processing of the rear axle housing process, due to the original fixture is not firmly pressed, easily lead to tilt the workpiece, so that the hole becomes oval, and sometimes even damage the drill. The article entitled “Introducing a Pneumatic Clamping Device with Double Four-bar Linkage Mechanism”, which is published in Combo Machine Communication Bulletin No. 1 of 1974, points out that the power multiplying factor of the double four-bar linkage mechanism can reach as high as 20 without considering the friction loss Fu (currently used by a variety of power agencies, their increase