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October 28, 2019
In CNC milling or lathing, Different shapes need use different cutting tools. This article stated some knowledge of cutter in CNC machining.
According to the end geometry:
For the cutting tools used for finishing, the cutting edge must have good profile accuracy.
If the requirements for machining workpiece accuracy are very high, standard certified tools should be purchased from the tool manufacturer. KYLT CNC milling, CNC turning processes, adopt famous brand cutter to got high precision machined parts.
On the premise of ensuring that the maximum overhang length of the tool shank and tool system does not exceed the specified value, in order to make the spindle operate accurately, the radial run out error of the tool must be detected at the tool shank and cutting edge respectively. If the radial run out error is too large, it will cause serious vibration of the spindle.
1) analyze the specific processing conditions, such as spindle and machine performance, tool clamping system, lubrication mode, etc.
2) analyze the material characteristics of the workpiece;
3) analyze the surface quality, machining accuracy requirements, cost, etc.
4) comprehensively consider various factors and make the optimal choice.
Three important formulas
Definition of cutting speed: VC = n * p * deff / 1000
VC refers to the appropriate cutting speed value suitable for high-speed machining of a workpiece material in the case of a specific tool. It refers to the linear speed of the tool.
VC value is an important basis for setting other cutting parameters correctly!
Color comparison of iron chips produced at different cutting speeds
Calculation of effective tool diameter and effective tool diameter.
Definition of feed per blade:
Whether the feed rate of each cutting edge is set correctly or not has a very important influence on the reasonable distribution of cutting load on the tool.
Calculation of axial feed:
The actual results will be affected by the spindle, tool and material.
Reasonable value can not only bring the cutting efficiency of the tool to the limit, make full use of the tool, improve the machining quality and efficiency, but also will not affect the service life of the tool, so as to achieve the purpose of saving cost and achieving real high-speed machining.
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