Let's talk about milling processing first, and analyze it from the factors of extending tool life:
Milling is a process in which the tool cuts into and out of the workpiece intermittently. This causes the temperature at the cutting edge to continually fluctuate between high and low temperatures.
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When the cutting edge continuously fluctuates between high and low temperatures and there is cutting fluid, the cutting edge is prone to thermal cracks, which may lead to the premature end of the tool's effective life.
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Cutting fluid should always be used during rough milling to extend the life of the cutting edge.
So when to use cutting fluid?
1. Milling of thin-walled parts, in order to prevent workpiece deformation
2. Process deep cavities to assist chip removal
3. Milling of high-temperature alloys at low cutting speeds - for lubrication and cooling of parts
4. Cast iron milling - used to moisten and flush away dust to protect the environment and health
5. Stainless steel and aluminum alloy finishing - used to prevent metal particles from bonding into the surface structure
