What problems will arise during the processing of graphite?
Sep 23, 2023
1, graphite is a kind of brittle data, although relatively simple cutting, but as a seal end graphite data need to meet the strength! In order to avoid damage to the side during the assembly process, the shape and wall of the parts are thin, rounded and sharp angles, etc., and the crystal size and strength of graphite are also very high requirements, which lead to the graphite workpiece in the processing process is fragile and cracked.
2, graphite is a self-lubricating, high temperature resistance, oxidation resistance, small coefficient of thermal expansion, low conflict coefficient, low density and can be processed good solid self-lubrication data, it can be in high speed, high pressure or low speed heavy load dry conflict working conditions or in water, oil, ammonia, propane, acid, alkali, salt and other media work. Because graphite has the above excellent functions, it has been widely used! The production of graphite and the processing of graphite parts also have more and more extensive market space.
3, because of the particularity of graphite materials, resulting in graphite products in the actual production of processing scale and other accuracy is difficult to guarantee! Especially in the ordinary carbide turning tool processing can wear 0.05mm to 0.08mm per 1002mm and the appearance of simple slag drop phenomenon, so it is often necessary to complete the cutting with grinding, cutting accuracy and surface roughness requirements. In addition, because of the brittleness and high hardness of the data, there are simple phenomena such as collapsing corners and jagging edges in the time of turning shaft, through hole, flat end face and cutting. Therefore, it is very difficult to process steel materials.
The tool data is the fundamental factor to determine the cutting function of the tool, which has great influence on the machining efficiency and machining quality and the service life of the tool. The harder the tool data, the better the wear resistance, the higher the hardness, the lower the impact resistance, the more brittle the data, the hardness and resistance are relative opposites, and the tool data should be overcome as a key.
As far as graphite tools are concerned, if the product is single and the structure is simple, the ordinary TIAIN coated knife block can be used in mass production, and the relatively good resistance can be appropriately selected in the material selection, that is, the cobalt content is higher, and the graphite tool with the fine steel coating can be selected with relatively good hardness, that is, the cobalt content is lower. On the variety of products, the structure is messy, you can choose the general carbide tool. Its advantages are strong in mobility and plasticity, but the disadvantages are also obvious, and the wear is very serious! Frequent sharpening of tools is required.
