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图中所示刀具是专为电扇马达轴承座设计的内球面挤压刀。内球面挤压前可直接用成型刀鍯出,但要注意孔口直径不能大,否则达不到挤压效果。一、挤压片和刀体挤压片可直接在车床上车出,淬硬后抛光即可。挤压片的公差一般选在轴承座内球面公差带的中段.挤压片与刀体槽的配合为H7/f7。挤压片R面光洁度应在▽9以上。刀体上的挤压片槽要位于刀体中间,对称度要高。刀体后部有莫氏锥体,可直接插在车床尾架中使用。二、挤压片与销的配合由于挤压片上面的孔与销的配合有很大的间隙
The tool shown in the figure is designed for fan motor bearing inner spherical extrusion knife. Spherical extrusion can be used directly before molding knife 鍯 out, but pay attention to the diameter of the orifice can not be large, otherwise not reach the squeeze effect. First, the extrusion and blade extrusion tablets can be directly on the lathe car, hardened after polishing. Tolerances for extrusion are generally selected in the middle of the spherical tolerance zone in the housing. The fit between the extrusion and the body is H7 / f7. Extruded R surface finish should be ▽ 9 or more. Squeeze blade on the blade body to be located in the middle of the body, the symmetry to be high. Morse cone at the rear of the body can be inserted directly in the use of the tailstock lathe. Second, the cooperation of extrusion and pin As the extrusion sheet above the hole and pin with a large gap