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(Hand model) CNC lathe cutting

Oct 30,20

(Hand model) CNC lathe cutting

CNC
lathe is an automatic machine tool with high precision and high efficiency.It is mainly used for cutting the inner and outer cylindrical surface of shaft parts or disk parts, the inner and outer cone surface of any cone Angle, the inner and outer surface of complex rotation, cylinder, taper thread and so on, and can cut grooves, drill holes, reaming, reaming and boring, etc.
CNC lathes, also known as CNC lathes, that is, computer digital control lathes, is the largest domestic use, the most extensive coverage of a CNC machine tools, accounting for about 25% of the total number of CNC machine tools.CNC machine tools are mechanical, electrical, hydraulic, pneumatic, microelectronics and information technology as one of the mechanical and electrical integration products.It is a working master machine with high precision, high efficiency, high automation and high flexibility in mechanical manufacturing equipment.The technical level of CNC machine tools and the percentage of their output and total ownership in metal cutting machine tools is one of the important indicators to measure the development of a national economy and the overall level of industrial manufacturing.CNC lathe is one of the main varieties of CNC machine tools, it occupies a very important position in CNC machine tools, for decades has been the world's general attention and rapid development.
The appearance of CNC lathe makes the enterprise get rid of the backward processing technology, CNC lathe processing technology and the ordinary lathe processing technology is similar, but because the CNC lathe is a clamping, continuous automatic processing to complete all the turning process, so should pay attention to the following aspects.
Reasonable choice of cutting parameters
For high-efficiency metal cutting, the material to be machined, cutting tools and cutting conditions are the three main factors.These determine the processing time, tool life and processing quality.An economical and effective machining method must be a reasonable choice of cutting conditions.
Factors of cutting conditions: cutting speed, feed and cutting depth directly cause tool damage.With the increase of cutting speed, the tip temperature will rise, resulting in mechanical, chemical, thermal wear.Cutting speed increases by 20% and tool life decreases by half.
The relation between the feed conditions and the wear behind the tool occurs in a very small range.But large feed, cutting temperature rise, behind the wear.It has less effect on the tool than the cutting speed.The influence of cutting depth on the tool is not as large as the cutting speed and feed, but in the micro cutting deep cutting, the cutting material produced hardening layer, will also affect the tool life.
The user shall choose the cutting speed according to the material to be machined, hardness, cutting state, material type, feed, cutting depth, etc.The selection of the most suitable processing conditions is based on these factors.Regular, steady wear to life is the ideal condition.
However, in practice, the choice of tool life is related to tool wear, size change, surface quality, cutting noise, machining heat, etc.In determining the processing conditions, the research should be carried out according to the actual situation.For refractory materials such as stainless steel and heat resistant alloys, you can use a coolant or choose a rigid blade.
The quality of cutting mainly refers to the machining accuracy of the workpiece (including size, geometry and the position of each surface) and the surface quality (including surface roughness, residual stress and surface hardening).With the progress of technology, the quality of cutting continues to improve.In the late 18th century, machining accuracy was measured in millimeters;At the beginning of the 20th century, the highest cutting accuracy has reached 0.01 mm;To the 50 s, cutting accuracy has reached the highest micron level;In the 1970s, machining accuracy was increased to 0.1 micron.The main factors affecting the quality of cutting include machine tools, cutting tools, fixtures, workpiece blanks, process methods and processing environment.In order to improve the quality of cutting, it is necessary to take appropriate measures to the above aspects, such as reducing the working error of the machine tool, correctly selecting cutting tools, improving the quality of the blank, reasonably arranging the process, improving the environmental conditions and so on.