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对于具有中心孔的工件,在热处理后,为了获得良好的定位基准,需对中心孔进行研磨。一般是用60°锥形铸铁顶尖加研磨膏进行研磨,每研磨一孔,约用30分钟。用图示的四棱锥挤刮中心孔可提高工效50倍以上。该刀具是用硬质合金制作的。尖
For workpieces with a center hole, the center hole needs to be ground for good positioning after heat treatment. Generally 60 ° cone cast iron top plus abrasive paste grinding, grinding a hole for about 30 minutes. Squeeze the center hole with the illustrated four-sided pyramid to improve work efficiency by more than 50 times. The tool is made of cemented carbide. tip