At present, the processed aluminum parts are mainly divided into two categories: deformed aluminum alloy and cast aluminum alloy. Then, what kind of milling cutter is used for processing aluminum alloy, is it special milling cutter for aluminum alloy or special cutter for aluminum alloy, and its processing efficiency is better? In this paper, from the aspects of milling characteristics, machining tools and cutting parameters of aluminum alloy, it is best to talk about the milling cutter used for machining aluminum alloy.
First, the processing characteristics of aluminum alloy Milling aluminum alloy has the following major features;
1. Low hardness of aluminum alloy Compared with titanium alloy and other hardened steel, the hardness of aluminum alloy is lower, of course, heat treatment, or the hardness of die-cast aluminum alloy is also high. The HRC hardness of ordinary aluminum plates is generally below 40 degrees HRC. Therefore, when machining an aluminum alloy, the load of the tool is small. Because of the better thermal conductivity of aluminum alloy, the cutting temperature of milling aluminum alloy is relatively low, which can improve the milling speed.
2. The alloy of aluminum is low in plasticity and has low plasticity and low melting point. When the aluminum alloy is processed, the problem of the sticking knife is serious, the chip discharging performance is poor, and the surface roughness is also relatively high. In fact, the processing of aluminum alloy is mainly the sticking knife and the roughness is not good. As long as the two problems of the sticky knife and the surface quality are solved, the problem of aluminum alloy processing is solved.
3, the tool is easy to wear because the tool material is not suitable, when processing aluminum alloy, the tool wear is often accelerated due to problems such as sticking knife and chip removal.
Machining aluminum alloys generally use a 3-blade aluminum milling cutter. Secondly, due to the difference in processing conditions, a 2-blade ball-end knife or a 4-blade flat-bottom knife is likely to be used. However, it is recommended that in most cases, a 3-blade flat end mill can be used.
1. The number of selected blades for aluminum tungsten steel milling cutters is generally 3 blades. The material is generally selected from YG type hard alloys, which can reduce the chemical affinity of the tool and aluminum alloy. General CNC tool brands have a series of special milling cutters for processing aluminum alloys.
2, high-speed steel material high-speed steel aluminum milling cutter is more sharp, but also can be well processed aluminum alloy.
3. Cutting parameters of milling aluminum alloy
High-speed large-feed milling can be selected for processing ordinary aluminum alloys. Secondly, choose a larger front angle as much as possible to increase the chip space and reduce the phenomenon of sticking. If it is a finished aluminum alloy, it is not possible to use a liquid cutting fluid to avoid forming small pinholes on the machined surface. Generally, kerosene or diesel oil can be used as the cutting fluid for processing aluminum plates. The cutting speed of the machined aluminum alloy milling cutter varies depending on the material and parameters of the milling cutter and the machining process. The specific cutting parameters can be processed based on the cutting parameters given by the manufacturer.