When CNC machine tools are working, it is not necessary for workers to directly operate the machine tools. To control CNC machine tools, machining programs must be compiled. The machining program of parts includes the relative motion trajectory of cutter and workpiece on the machine tool, process parameters (feed speed, spindle speed, etc.). ) and auxiliary exercise.
Parts processing program is stored in a program carrier with a certain format and code, such as punched paper tape, cassette tape, floppy disk, etc. And the program information is input to the CNC unit through the input device of the CNC machine tool.
High machining accuracy
Generally, the machining accuracy of CNC machine tools can reach 0.05-0. 1 mm, and CNC machine tools are controlled in the form of digital signals. Every time the numerical control device outputs a pulse signal, the moving parts of the machine tool move by a pulse equivalent (generally 0.05-0.1mm), and the average error between the reverse clearance and the pitch of the machine tool feed transmission chain can be compensated by the rows of the numerical control device, so the positioning accuracy of the numerical control machine tool is relatively high.
The NC machine tool is adjusted before processing, and the program is input and started, so that the machine tool can automatically and continuously process until the end of processing. What operators have to do is to input and edit programs, assemble and disassemble parts, prepare tools, observe the machining state, check parts, etc. The labor intensity is greatly reduced, and the work of machine tool operators tends to be intelligent.