The main goal is the pursuit of metal stamping material removal rate per unit time, and prepare for the semi-finished workpiece geometry contour. In the cutting process due to changes in the area of cutting layers of metal, resulting in the tool to withstand the load changes, so that the cutting process is unstable, uneven tool wear rate, the machined surface quality.
　　The current development of a number of cam software available through the following measures to maintain constant cutting conditions to obtain good processing quality. Constant cutting loads. Obtained by calculating the constant cutting floor area and the material removal rate, the cutting loads and tool wear rate remains balanced, in order to increase tool life and processing quality. Avoid sudden changes in the tool feed direction. Avoid the tool embedded in the workpiece. Such as the processing of the mold cavity, the tool vertically into the workpiece should be avoided, but should be used under the knife tilt mode, using spiral under the knife to reduce tool load; machining mold core, should try to start with the workpiece external level under the knife then cut into the workpiece . Cutting tool, the workpiece should be cut out using as tilting (or arc type) cut, cut out, avoid vertical cut, cut.
　　The new development is directly connected by an external computer and CNC machine tools by rs-232c serial port, direct fast, accurate transmission nc program and an external computer with multiple CNC machine tools have the same or a different control system is connected , information sharing, and the production process can manage multiple CNC machine components within the information section, in order to reduce production preparation, particularly preparation time NC nc program.