The cutting shaft gauges themselves have errors or are not adjusted when applied. Before applying the gauges, the precision shaft custom processing must be carefully checked and adjusted, and adjusted when applied. Due to the change of temperature, so that the workpiece specifications change, cutting, chip deformation, chip molecules move with each other, move when the conflict occurs, a lot of heat occurs. In addition, heat also occurs due to the conflict between the chips and the front of the turning tool, and the conflict between the back of the turning tool and the surface of the workpiece, which are directly related to the tool and the workpiece. Of course, very high heat is the chip (about 75% of the fiddling), followed by the turning tool (about 20%) and the workpiece (about 4%, and 1% in the air). When the workpiece is heated the diameter increases (about 0.01 ~ 0.05mm, pig iron change than steel material), the diameter decreases after cooling, the formation of scrap, precision CNC CNC machining so can not be measured when the workpiece temperature is very high. If you must side measure, pour enough cutting oil in the cutting process to avoid the workpiece temperature rise; second, separated by coarse and fine turning. The blank remaining all can not, the blank itself can not straighten, and its base hole deviation and other elements formed.
