1. High processing accuracy
CNC machines are machined according to instructions given in digital form. At present, the pulse equivalent of CNC machine tool generally reaches 0.001, and the backlash of feed transmission chain and the screw pitch error can be compensated by CNC device, therefore, CNC machine tool can achieve high machining accuracy. For small and medium-sized CNC machine tools, its positioning accuracy can generally reach 0.03, and the repeated positioning accuracy is 0.01.
2. Strong adaptability to processing objects
When the CNC machine tool changes the processed parts, it is only necessary to re-program the program, and the new program can realize the processing of the new parts, which provides great convenience for the single piece of complex structure, small batch production and trial production of new products. For those precision and complex parts that are difficult or impossible to process by ordinary manual machine tools, CNC machine tools can also achieve automatic processing.
3. High degree of automation and low labor intensity
The machining of the parts is done automatically according to a pre-programmed program, and the operator does not need to perform complex repetitive manual operations except for placing the perforated tape or operating the keyboard, loading and unloading the workpiece, intermediate detection of key processes, and observing the operation of the machine. CNC machine tools generally have better safety protection, automatic chip removal, automatic cooling and automatic lubrication devices, and the working conditions of operators have been greatly improved.
4. High production efficiency
The spindle speed and feed of CNC machine tools vary in a wide range, so the most advantageous cutting amount can be selected for each process of CNC machine tools. The structure of the CNC machine tool has good rigidity, which allows for strong cutting with a large amount of removal, improves the cutting efficiency and saves maneuvering time. Because the idle stroke movement speed of the moving parts of the CNC machine tool is fast, the clamping time and auxiliary time of the workpiece are less than those of the general machine tool.
5. It is convenient to replace the processed parts
When the digital drawing machine tool replaces the machined parts, it is almost impossible to readjust the machine tool, so the part installation and adjustment time is saved. The machining quality of CNC machine tools is stable, and generally only the first article inspection and sampling inspection of key dimensions between processes are done, so the downtime inspection time is saved. When machining is carried out on a machining center, one machine realizes continuous processing of multiple processes, and the improvement of production efficiency is more obvious.
6. Good economic benefits
(1) The use of CNC machine tools can save marking man-hours, reduce adjustment, processing and inspection time, and save direct production costs; (2) The processed parts generally do not need to make special fixtures, which saves the cost of process equipment. (3) CNC machining accuracy is stable, reducing the scrap rate, and further reducing the production cost.