10
2022
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03
Four Key Points to Note in CNC Lathe Machining
Author:
CNC lathe machining is a high-precision, high-efficiency mechanical processing method that uses digital information to control the displacement of parts and tools on automated machine tools. Since CNC lathe machining completes all turning processes in one setup with continuous automatic processing, the following points should be noted during CNC lathe machining. 1. Pay attention to the selection of cutting parameters The three key elements of cutting conditions in CNC lathe machining are cutting speed, feed rate, and depth of cut, which can directly cause tool damage. As the cutting speed increases, the temperature at the tool tip rises, leading to mechanical, chemical, and physical wear. A 20% increase in cutting speed can reduce tool life by half. The impact of feed rate on tool wear is less than that of cutting speed, but a larger feed rate increases cutting temperature, resulting in greater tool wear. Although the depth of cut has less impact on the tool compared to cutting speed and feed rate, when cutting with a small depth of cut, the material being cut can produce a hardened layer, which can also affect tool life. 2. Pay attention to the selection of tools 1) For rough turning, choose tools with high strength and durability to meet the requirements of large back cutting amounts and high feed rates. 2) For finishing, select tools with high precision and durability to ensure the required machining accuracy. 3) To reduce tool change time and facilitate tool setting, try to use machine-clamped tools and machine-clamped inserts. 3. Pay attention to the selection of fixtures 1) Preferably use universal fixtures to clamp workpieces, avoiding the use of special fixtures; 2) Ensure that the positioning reference of the parts coincides to reduce positioning errors. 4. Pay attention to the selection of machining paths The machining path refers to the trajectory and direction of the tool relative to the part during the CNC lathe machining process. 1) It should ensure the required machining accuracy and surface roughness; 2) The machining path should be as short as possible to reduce the tool's idle travel time.
CNC lathe processing is a high-precision, high-efficiency mechanical processing method that uses digital information to control the displacement of parts and tools on automated machine tools. Since CNC lathe processing completes all turning processes in one clamping and continuous automatic processing, the following points should be noted during CNC lathe processing.
1. Pay attention to the selection of cutting parameters.
The three key elements of cutting conditions in CNC lathe processing are cutting speed, feed rate, and depth of cut, which can directly cause tool damage. As the cutting speed increases, the temperature at the tool tip rises, leading to mechanical, chemical, and physical wear. If the cutting speed increases by 20%, the tool life will be reduced by half. The impact of feed rate on tool wear is less than that of cutting speed, but if the feed rate is large, the cutting temperature rises, leading to greater tool wear. Although the depth of cut has less impact on the tool than cutting speed and feed rate, when cutting with a small depth of cut, the material being cut can produce a hardened layer, which will also affect tool life.
2. Pay attention to the selection of tools.
1) For rough turning, choose tools with high strength and good durability to meet the requirements of large back cutting amounts and large feed rates.
2) For finishing, choose tools with high precision and good durability to ensure the required processing accuracy.
3) To reduce tool change time and facilitate tool alignment, machine clamped tools and machine clamped inserts should be used as much as possible.
3. Pay attention to the selection of fixtures.
1) Try to use universal fixtures to clamp workpieces, avoiding the use of special fixtures.
2) The positioning reference of the parts should coincide to reduce positioning errors.
4. Pay attention to the selection of processing routes.
The processing route refers to the motion trajectory and direction of the tool relative to the part during the CNC lathe processing.
1) It should ensure the required processing accuracy and surface roughness.
2) The processing route should be shortened as much as possible to reduce the tool's idle travel time.
Cutting tools, CNC lathe
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