大多数铸铁工件在棱角部分存在着硬点,有的硬度达HB300,加工时容易崩刃,轻者严重影响铸件表面粗糙度,重者则不能继续加工下去。目前,进口的加工中心一般都具有自适应扭矩控制系统。首先根据工件材料和使用刀具的切削性能选择好切削用量,在程序中设置适当的扭矩参数,然后进行加工。在切削过程中,如果遇到硬点,系统将自动调整,使进给量减小到安全的状态下切削,当硬点切削过,系统再自动调整,使进给量恢复到原来的数据切削。这样既可以采用大的进给量,又不会使刀具崩刀,降低了工件的表面粗糙度,同时大大地提高了生产率。 Most cast iron parts in the angular part of the existence of hard points, and some hardness of HB300, easily collapsing during processing, the light seriously affect the casting surface roughness, severe cases can not continue processing. At present, imported machining centers generally have adaptive torque control systems. First of all, according to the workpiece material and the cutting performance of the use of cutting tool to choose a good amount of cutting, set the appropriate torque parameters in the program, and then processing. In the cutting process, if you encounter hard points, the system will automatically adjust the feed to reduce the safe state cutting, when the hard point cutting, the system automatically adjusts, the feed back to the original data cutting . This allows large feed rates to be used without chipping the tool, reducing the surface roughness of the workpiece and greatly increasing productivity.