The cutting temperature generally refers to the average overflow of the chip, the contact area between the low price disc for metal and the tool. The cutting temperature can be estimated by observing the color of the chip in addition to the instrument. When cutting carbon steel, the chips are silvery white and light yellow, indicating that the cutting temperature is low, and the chips are purple or dark blue, indicating that the cutting temperature is very high.
The cutting temperature depends on the generation and dispersion of cutting heat. It is mainly affected by factors such as cutting amount, workpiece material, tool material, tool angle and cooling conditions.
(1) The most used for cutting. Increasing the cutting speed increases the cutting heat generated per unit time, which increases the cutting overflow. The cutting speed has the largest shape for the cutting overflow. When the feed amount and the depth of cut increase, the cutting force increases and the friction is also large, so the heat of cutting also increases. Under the same cutting area, the increase in feed can reduce the cutting temperature compared to the Lining depth. When the depth of cut is increased, the length of the cutting edge participating in the cutting increases, which will facilitate the transfer of the cutting heat.
(2) Workpiece materials. The higher the strength and hardness of the workpiece material, the more work is consumed during cutting, the more cutting heat is generated, the higher the cutting temperature, the better the thermal conductivity of the material, and the heat of cutting can be quickly transmitted through the workpiece and the intestine. The cutting temperature is low.
(3) Tool material. A highly thermally conductive tool material allows the cutting heat to be transmitted quickly, reducing the cutting allowance.
(4) Tool angle. Increasing the tool rake angle can deform the chip, reduce the friction between the chip and the rake face, thus reducing the cutting heat and reducing the cutting degree. However, when the rake angle is too large, the heat transfer condition of the tool becomes Poor, but not conducive to heat dissipation, is not conducive to reducing the cutting temperature. The main declination is reduced, the length of the cutting edge participating in the cutting increases, which is conducive to heat dissipation and reduce the cutting degree.
(5) Cooling conditions. The cutting fluid can be used to effectively reduce the cutting temperature.