Aluminum parts deformation problem Aluminum alloy parts have a large coefficient of thermal expansion of the material, so it is easy to deform in the thin-wall machining process. Especially when using free forging blanks, the machining allowance is large, and the deformation problem is more prominent.
Today we will learn what measures should be taken for CNC machining aluminum alloy parts deformation?
First of all, we know that in cnc turning processing, there are many reasons for the deformation of aluminum alloy parts, in the shape of the material parts production conditions, and the performance of the cutting oil, related to.
There are mainly the following aspects:
- Deformation caused by internal stress in the blank
- Deformation caused by cutting heat
- Deformation caused by clamping force
The following solutions are available for the machining of such machine parts.
Improve the tool structure to reduce the number of teeth of the milling cutter and increase the chip capacity.
Due to the large plasticity of aluminum alloy material, cutting deformation during machining, the need for a larger chip space, so the bottom radius of the chip tank should be large, the number of teeth of the milling cutter should be small. Fine grinding cutter teeth in the use of new knives before, we need to use a fine grinding stone gently grinding cutter teeth on the front and back, in order to eliminate the residual burrs and slight serration marks when the blade grinding teeth. This not only reduces cutting heat, but also reduces cutting deformation.
Strictly control the tool wear standard tool wear after the product surface roughness increases, product deformation increases with the cutting temperature.
Therefore, in addition to selecting good wear-resistant tool materials, should also strictly control the tool wear, otherwise it is easy to produce chip deposition. Cutting product temperature should not be too high to prevent deformation.
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