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What kind of milling cutters for aluminum parts?

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Summary:Aluminum alloys are usually processed with three-edge aluminum milling cutters, followed by two-edge ball-nose cutters, or four-edge flat-bottomed cutters, because of differences in processing conditions. But Xiaobian suggested that in most cases, a 3...

Processing aluminum parts are mainly divided into two categories: deformed aluminum alloy and cast aluminum alloy, then what kind of milling cutter is used to process aluminum alloy, is it better to use aluminum alloy special milling cutter? From the milling characteristics of aluminum alloys, cutting tools, cutting parameters and other aspects to talk about the processing of aluminum alloys with what milling cutter is good.

I. processing characteristics of aluminum alloys
Milling aluminum alloy has the following characteristics.

1. Low hardness of aluminum alloy
Aluminum alloys have lower hardness than titanium alloys and other quenched steels, and of course, heat treated or die-cast aluminum alloys have higher hardness. The HRC hardness of common aluminum plates is generally below HRC40 degrees. Therefore, when machining aluminum alloy, the tool load is small. Because the thermal conductivity of aluminum alloy is better, the cutting temperature of milling aluminum alloy is lower, which can improve the milling speed.

2. Low plasticity of aluminum alloy
Aluminum alloy has low plasticity and low melting point. The problem of sticky knife is serious, the chip removal performance is poor and the surface roughness is high. In fact, processing aluminum alloy is mainly sticky knife and roughness effect is not good. As long as the two major problems of sticking knife and surface quality are solved, the problem of aluminum alloy processing will be solved.

3. Tool wear easily.
Because of the inappropriate tool materials, aluminum alloy processing, often because of sticking knife, chip removal and other problems resulting in tool wear faster
Two. What milling cutter is used for processing aluminum alloy?
Aluminum alloys are usually processed with three-edge aluminum milling cutters, followed by two-edge ball-nose cutters, or four-edge flat-bottomed cutters, because of differences in processing conditions. But Xiaobian suggested that in most cases, a 3 edged flat end mill can be used.
Cemented carbide (tungsten steel) material edge number is generally 3 edges, the material generally choose YG class cemented carbide, this can reduce the chemical affinity between the tool and aluminum alloy. The general brand of NC cutter has a series of special milling cutters for processing aluminum alloy. It is recommended to use the tungsten steel milling cutter specially produced by our factory.
Three. Milling parameters of aluminum alloy
Machining ordinary aluminum alloy can generally choose high-speed and large feed milling. Secondly, choose the larger front angle as far as possible, increase the chip space and reduce the phenomenon of sticky knife. If it is finishing aluminum alloy, can not use water cutting fluid, to avoid the formation of small pinholes in the machining surface, kerosene or diesel oil can generally be used as the cutting fluid processing aluminum plate.
The cutting speed of aluminium alloy milling cutter varies with the material and parameters of the milling cutter and the processing technology. The specific cutting parameters can be consulted online.

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