How to solve the deformation problem of aluminum alloy parts?

Aluminum alloy parts have large thermal expansion coefficients and are easily deformed during thin-wall processing. When the free forging blank is used, the machining allowance is large, and the deformation problem is very clear.

Aluminum alloy parts have large thermal expansion coefficients and are easily deformed during thin-wall processing. When the free forging blank is used, the machining allowance is large, and the deformation problem is very clear.

Today, let me introduce in detail what measures should be taken when CNC machining aluminum alloy parts deformed?

We know that during CNC machining, there are many reasons for the deformation of aluminum alloy parts, which are related to the material, the shape of the parts, the production conditions, and the performance of the cutting oil. There are mainly the following aspects: deformation caused by the internal stress of the blank, deformation caused by the cutting force and cutting heat, and deformation caused by the clamping force.

In response to such CNC parts processing problems, 13 years of cnc processing manufacturers specialize in new precision and use practical experience to come up with some solutions.

1 Optimize tool structure

Reduce the number of cutter teeth to expand the chip space. Due to the greater plasticity of the aluminum alloy material, the larger the cutting deformation during processing, the larger the chip-retaining space. Therefore, the radius of the chip-retaining groove bottom should be large and the number of cutter teeth should be small.

2 Fine grinding knife teeth

Before using a new knife, you should use a fine whetstone to lightly grind a few times in front of and behind the teeth to reduce the burrs and slight jagged lines that remain when sharpening the teeth. This not only reduces the cutting heat but also the cutting deformation is relatively small.

3 Strictly control tool wear standards

After the tool wears, the surface roughness value of the workpiece increases, and as the cutting temperature rises, the workpiece deformation increases. Therefore, in addition to choosing good-grinding tool materials, the degree of tool wear should also be strictly controlled, otherwise it is easy to produce built-up edge. The temperature of the workpiece during cutting should not be too high to reduce deformation.