NC (Digital Control) refers to controlling the operation of machinery and other equipment with discrete digital information, which can only be programmed by the operator himself.
CNC (Numerical Control Machine Tool) is the abbreviation of computer numerical control, and it is an automatic machine tool with program control system. The control system can use control codes or other symbolic instructions to logically process and decode the program, so as to make the machine tool move and process parts.
What's the difference between CNC machining metal parts and CNC machining plastic parts?
The metal part is relatively simple. After all, if you process, you will be skilled in this kind of work if you do more. Generally, people who have worked for several years will never get their hands wet. The difference lies in the mastery of different metals. This is easier to say.
Plastics crack easily because of internal stress. In addition to controlling the cutting speed, we should also pay attention to cooling, not just cooling.
Plastics have a certain temperature suitable for processing.
● It is easy to crack and deform, and burrs will hurt the corner position. The most obvious is acrylic. The corners are easy to crack.
If it is high, the contact position will melt and entangle the knife, forming adhesion. A white "film" will be formed on the machined surface. Can't wash it off, can't wipe it off.
The surface scratches easily. After all, the hardness is low. When purchasing raw materials for general plates and bars, it is necessary to pay attention to the selection of materials with complete surface protective film and no scratches. It is also important to choose the surface when machining. Determine which surface to machine on. Grasp where it is clamped and where it can't be clamped.
The machining table and clamping mechanism must also be clean. Otherwise, the plastic will dry immediately after processing stainless steel. The result is one line. There are vises and things like that. You'd better pad something. The clamping parts of many vises are tooth-shaped structures, and so are metal parts. None of PE, PVC, ABS and pom can stop it.