在液压或风动工具的生产中,常遇到如图1所示的零件,要加工φ3处的经向盲孔通道。按一般方法可以用附加一个带螺纹的凸台,并用螺钉拧紧,但这种做法不能保证可靠的气密性,并影响外观。如采用径向打通孔后再用焊接填塞的方法,结果也不太理想。采用如图2所示的工具,用电腐蚀加工,就可以克服上述缺点。如图2,柄部1与电加工机床主轴紧固。(见图3), In the production of hydraulic or pneumatic tools, often encounter the parts shown in Figure 1, to be processed at φ3 meridional blind hole channel. As a general rule, it is possible to attach a threaded boss and tighten it with a screw, but this does not guarantee a reliable air tightness and affects the appearance. Such as the use of radial holes and then through the welding method of packing, the result is not very satisfactory. Using the tools shown in Figure 2, the use of electricity corrosion processing, you can overcome the above shortcomings. As shown in Fig. 2, the shank 1 is fastened to the spindle of the electric machining machine. (See Figure 3),