The characteristics of nc machine tools

1. Highly flexible in guarantee the precision of the workpiece surface, mainly depends on the processing procedures, it is different from ordinary machine tool, don't have to make, change the number of tools, jigs, often do not need to adjust the machine. Therefore, numerical control machine is suitable for the occasion of frequent replacement parts. Is suitable for single piece and small batch production and the development of new products, shorten production preparation cycle, save the cost of a large number of process equipment. Machining precision of high precision nc machine tools, general can reach 0. 005-0. 1 mm, nc machine tools is according to the form of digital signal control, numerical control device for each pulse signal output, then the machine moving parts move a pulse equivalent, As a general rule, be 0. 001mm） , and machine tool feed drive chain of the reverse clearance and screw pitch error of the mean can compensate by numerical control device, therefore, the numerical control machine tool positioning accuracy is higher. Machining quality is stable, reliable, with a number of parts, in the same machine tool, in the same processing conditions, using the same tools and processing procedures, cutter feeding trajectory are exactly the same, good consistency of the parts, quality is stable. 4. High productivity of CNC machine tool can effectively reduce the processing time and auxiliary time parts, large range of nc machine tool spindle speed and feed, allow big strong cutting the amount of cutting machine tools, CNC machine tools the fast moving and positioning of moving parts and the high speed machining, reduce the intermediate process between the turnaround time, improve the production efficiency. 5. Improve the working conditions of nc machine tool processing before after adjust input program and start, the machine can automatically continuous processing, until the end of processing. Operator is mainly program input, editing, loading and unloading parts, tool preparation, processing condition observation, parts inspection, etc, greatly reduce the Labour intensity, machine operator Labour tends to intellectual work. In addition, the machine tool is usually enclosed processing, clean, and safe. 6. Production management of modern CNC machine processing, can be precisely estimated processing time in advance, the cutting tool, jig can be used for standardization, modernization of management. Nc machine tools using digital control signal and standard code for information, easy to implement the standardization of processing information, is now with the computer aided design and manufacturing, CAD/CAM） Organically, is the foundation of the modern integrated manufacturing technology.