In the manufacture of various CNC machine tools and other machinery, application of CNC milling cutter device is very extensive. In recent years, with the development of numerical control technology, generally improve the degree of automation, CNC machine, CNC milling machine, production and application of the increasingly widespread, high precision CNC milling cutter, high demand the more.
As manufacturers continue to introduce a more powerful and more efficient products, machine manufacturing becomes more and more complex, the difficulty has become increasingly high. Besides having complex contours and tighter tolerances, the milling machine usually uses high performance materials, although it provides the required strength and reliability, but also have a negative impact on machinability. As in milling machining plane, steps, grooves, forming tools surface and workpiece cutting process, rotary cutter cutter has one or more teeth, the margin of each tooth were intermittently cut to the work.
In the process of milling cutter, to play the greatest efficiency of processing, the correct choice of cutter tooth number is very important. For example the diameter of tooth cutter lOOmm only 6 teeth, while the diameter of lOOmm dense gear milling cutter can have 8 teeth. The tooth density will influence the level of production efficiency and product quality. If the cutter tooth is intensive, production efficiency will be improved, the quality of the workpiece is also better, but the knife tooth will discharge dense inconvenience caused chip. According to the tooth size, can be divided into fine teeth, tooth, tooth.
Roughing tooth applied to the workpiece, 1 ~ 1.5 blades with the diameter of each 25.4mm chip, a larger space, this tool is used for cutting soft materials can produce continuous chips, with long blade, large width of cut. Dense tooth is conducive to smooth processing conditions, generally used for rough machining of cast iron. Shallow cutting is also suitable for high temperature alloy, narrow cutting and chip space without cutting tooth. When applied to the fine mill, the axial cutting depth is 0.25 ~ 0.64mm, the cutting load of each tooth is small, the power required is small, such as for machining materials. The cutter tooth pitch will determine the number and size of at the same time in milling cutting, cutting period should have at least one blade in order to avoid the impact of cutting, milling, lead to overload and damage to the machine tool.
In addition, the blade tooth number selection must make appropriate chip curling and easy to leave the cutting area, cutting chip space will lead to improper hold crumbs, and may damage the workpiece edge damage. At the same time, the blade and sufficient density to ensure any time during cutting in the cutting blade of not less than one, if you can not guarantee this point will cause severe impact, which will lead to blade rupture, overload and damage to the machine tool.