在平面磨床加工不导磁工件时,我们制成一套真空夹具。结构简单(见图)。夹紧力靠大气压力与真空夹其内的压力差产生,力的大小可近似计算为:P≈(1-p)·(F_1+(F_2)-F_1)/2)P——夹紧力(公斤);p——夹具内真空压力(公斤/厘米~2);F_1——夹具抽气孔面积(厘米~2);F_2——工件对夹具能盖严的面积(厘米~2)。直接影响夹紧力的是工件安装面大小,针对磨床工作特点,选用较小的真空泵,泵的容量为30升。为使吸力稳定,并防止 In the plane grinder machining non-magnetic workpiece, we made a set of vacuum fixture. Simple structure (see picture). The clamping force is generated by the pressure difference between the atmospheric pressure and the vacuum clamp, and the magnitude of the force can be approximated as P≈ (1-p) · (F_1 + (F_2) -F_1) / 2) P --- clamping force Kg); p - vacuum pressure within the fixture (kg / cm ~ 2); F_1 - fixture suction hole area (cm ~ 2); F_2 - workpiece to the fixture can cover the strict area (cm ~ 2). Directly affect the clamping force is the size of the workpiece mounting surface, grinder for the work characteristics, the choice of a smaller vacuum pump, the pump capacity of 30 liters. To keep the suction steady and prevent it