在钻削加工时,为了夹紧工件,在2H55型摇臂钻床工作台内,安装一气动装置(图1),能使被加工的不同形状的零件可靠而迅速地夹紧。气动装置由上平板2、拉杆3、支架5、气缸6、下平板7等组成。支架5用两螺栓固定在工作台1上、气缸6牢固地固定在支架5上,活塞杆用螺母8和下平板7连在一起。夹紧时,打开开关4,压缩空气沿气管 In the drilling process, in order to clamp the workpiece, in the 2H55 radial drilling machine table, install a pneumatic device (Fig. 1), can make the different parts of the processed shape reliable and rapid clamping. The pneumatic device is composed of an upper plate 2, a pull rod 3, a bracket 5, a cylinder 6, a lower flat plate 7 and the like. The bracket 5 is fixed on the workbench 1 by two bolts, the cylinder 6 is firmly fixed on the bracket 5, and the piston rod is connected with the lower plate 7 by the nut 8. When clamping, open the switch 4, compressed air along the trachea