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当用轧辊车刀和其它切削刀具加工轧辊时,在切削区产生热过程,使加工条件严重地变坏。由于铸铁导热系数很低(特别是高铬铸铁),当机械加工带有白硬层的铸铁轧辊时所产生的热量比加工普通结构材料时大5～20倍。众所周知,当以24米/分的切削速度纵向车削白口铬铁轧辊时,切削部分的温升为800℃以上。使用成型车刀车削量规时,工作条件特别不利。在采用成型刀具加工时,如果刀具的刃口宽度超过100毫米,不仅刀具的切削部分而且刀体上都产生大量的热。
When rolls are machined with roll turning tools and other cutting tools, thermal processes occur in the cutting zone, causing serious deterioration of the machining conditions. Due to the low thermal conductivity of cast iron (especially high-chromium cast iron), the heat generated when machining cast iron rolls with a hard white layer is 5 to 20 times greater than when machining ordinary structural materials. As we all know, when the longitudinal cutting of 24 m / min cutting speed white chrome iron roll, the cutting part of the temperature rise above 800 ℃. When using forming turning turning gauges, the working conditions are particularly unfavorable. In the use of forming tool machining, if the tool edge width of more than 100 mm, not only the cutting part of the tool and the body are a lot of heat.