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Views: 0 Author: Site Editor Publish Time: 2021-07-30 Origin: Site
The currently used CNC milling aluminum parts are mainly classified into deformed aluminum alloys and cast aluminum alloys. Then which milling cutter is better for machining CNC milling aluminum parts? Is it more efficient to process CNC milling aluminum parts with aluminum alloy special milling cutters or aluminum alloy special cutters? This article talks about the characteristics of aluminum milling, machining tools, and cutting parameters.
Here is the content list:
l Processing characteristics of CNC milling aluminum parts.
l What kind of milling cutter is used for CNC milling aluminum parts?
l Cutting parameters of CNC milling aluminum parts.
The main features of CNC milling aluminum parts are as follows:
1. Aluminum alloy has low hardness
Compared with titanium alloys and other quenched steels, the hardness of aluminum alloys is lower. Of course, the hardness of heat-treated or die-cast aluminum alloys are also very high. The HRC hardness of ordinary aluminum plates is generally below HRC40 degrees. Therefore, when machining CNC milled aluminum parts, the load on the tool is small. Because aluminum alloy has better thermal conductivity, the cutting temperature of CNC milling aluminum parts is relatively low, which can increase its milling speed.
2. Low plasticity of aluminum alloy
Aluminum alloy has low plasticity and a low melting point. When machining CNC milled aluminum parts, the sticking problem is serious, the chip removal performance is poor, and the surface roughness is relatively high. The main reason for machining CNC milling aluminum parts is that the sticking and roughness effects are not good. As long as the two major problems of sticking and machining surface quality when machining CNC milled aluminum parts are solved, the problem of CNC milling aluminum parts processing can be solved.
3. The tool is easy to wear
Because of the use of unsuitable tool materials, when CNC milling aluminum parts are processed, tool wear is often accelerated due to problems such as tool sticking and chip removal.
For CNC milling aluminum parts, 3-blade aluminum milling cutters are generally used. Secondly, because of the difference in the processing conditions of CNC milling aluminum parts, 2-blade ball-end cutters or 4-blade flat-bottom knives are likely to be used. But in most cases, a 3-flute flat-bottomed end mill can be used.
1. The choice of tungsten steel milling cutter for aluminum
The number of blades is generally 3 blades, and the material is generally YG cemented carbide, which can reduce the chemical affinity of the tool and CNC milling aluminum parts. General CNC tool brands have a series of special milling cutters for CNC milling aluminum parts.
2. High-speed steel material
The high-speed steel aluminum milling cutter is sharper, and it can also process CNC milling aluminum parts well.
Generally, high-speed and large-feed milling can be selected for processing ordinary CNC milling aluminum parts. Secondly, choose a larger rake angle as much as possible to increase the chip space and reduce the phenomenon of sticking. If it is precision machining CNC milling aluminum parts, water-cutting fluid cannot be used to avoid the formation of small pinholes on the surface of CNC milling aluminum parts. Generally, kerosene or diesel oil can be used as cutting fluid for CNC milling aluminum parts. The cutting speed of the milling cutter for machining CNC milling aluminum parts varies with the material and parameters of the milling cutter and the processing technology. Specific cutting parameters can be processed based on the cutting parameters given by the manufacturer
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