These determine the processing time, tool life and processing quality.
An economical and effective machining method must be a reasonable choice of cutting conditions.
The three elements of cutting conditions: cutting speed, feed rate and cutting depth directly cause tool damage.
With the increase of cutting speed, the tool tip temperature will rise, resulting in mechanical, chemical and thermal wear.
If the cutting speed is increased by 20%, the tool life will be reduced by 1/2. The relationship between feed conditions and tool back wear occurs in a very small range. However, with a large feed rate, the cutting temperature rises and the rear wear is large. It has less influence on the tool than the cutting speed.
Although the influence of cutting depth on the tool is not as big as that of cutting speed and feed rate, the hardened layer of the material to be cut will also affect the service life of the tool in micro deep cutting.
The user should select the cutting speed according to the processed material, hardness, cutting state, material type, feed rate, cutting depth, etc. The most suitable processing conditions are selected on the basis of these factors.
Regular and stable wear is the ideal condition for reaching the service life.
However, in practical operation, the choice of tool life is related to tool wear, machining size changes, surface quality, cutting noise, machining heat and so on.
When determining the processing conditions, it needs to be studied according to the actual situation. For difficult to machine materials such as stainless steel and heat-resistant alloys, coolants or rigid blades can be used.
