Alloy milling cutter in the course of more or less will encounter damage or wear and the like, but sometimes it is inevitable. However, we can do our best to minimize the damage. What are the ways to reduce wear and tear.
Needless to say, in the milling of nickel-based alloy, the heat is the most important factor affecting the life of the tool, even if the best carbide cutting tools, will be too high cutting heat destroyed. Resulting in a very high cutting heat, not just the problem of milling nickel alloy. So the need to control the heat when milling these alloys. In addition, it is also important to understand the amount of heat generated when machining various forms of tool (high speed steel tool, carbide cutting tool or ceramic tool).
Many of the tool damage is also related to other factors, different grid fixtures and tool holders are likely to shorten the tool life. When the clamping of the workpiece rigidity, cutting movement occurs, may cause the carbide matrix fracture. Sometimes produce small cracks along the cutting edge, and sometimes from the carbide blade collapse of a piece, can not continue to cut. Of course, this chipping may also be due to the hard alloy is too hard or cutting load caused by too much. At this time should consider the use of high-speed steel cutting tools to reduce the occurrence of chipping. Of course, high-speed steel tools can not be as hard alloy as the higher heat. What kind of material should be used, must be determined according to the specific situation.
Before the start of the process, the idea of strengthening the rigidity of the fixture, the future long-term production will bring benefits. Not only to extend the life of the tool, but also improve the workpiece surface quality, reducing the processing error.
Similarly, improper selection of the handle, but also shorten the tool life. Such as the diameter of 3.175mm end mill installed in the cutter handle (rather than the spring chuck), due to the role of fastening screws, so that the tool and the handle between the gap between the side, the tool center deviation The tool holder rotates the center so that the radial runout of the milling cutter increases, resulting in uneven cutting of the cutting load of each cutter. This cutting state is detrimental to the tool, especially when milling nickel-based alloys.
By using a tool holder that improves the eccentricity of the tool loading card, such as a hydraulic chuck and a hot chuck, the cutting effect can be more balanced and smoother, reducing tool wear and improving the surface quality. Select the knife handle should follow a principle, that is, the handle to be as short as possible. These clamping requirements for tools and workpieces are applicable to milling any material, and when milling nickel-based alloys, advanced machining experience is required.