affect the diamond tool wear several reasons

Determine the tool cutting tool material is a fundamental factor for the processing efficiency, processing quality,
Processing costs as well as a great influence on tool life. The more rigid tool material, the better the  bandsaw blades wear resistance, the higher the hardness, the lower the impact toughness, the material is hard. Hardness and toughness is a contradiction, but also the tool material that should overcome a key. For graphite tools, ordinary coating can be the appropriate choice in the selection of the relative toughness a little better, which is slightly higher cobalt content, for the diamond-coated graphite tool, you can choose in the selection hardness is relatively better, that is, slightly lower solids content.
2, the tool geometry graphite select the appropriate tool geometry, helps to reduce tool vibration, in turn, is not easy to collapse graphite piece missing; (a) rake angle, with a negative rake angle machining graphite, the tool edge mouth better strength, resistance to  concrete cutting blade impact and friction performance, along with the decrease of the absolute value of the negative rake angle, flank wear area changed little, but the overall decreasing trend, with positive rake angle machining, with the former angle increases, the tool edge strength is weakened, but led to increased flank wear. Negative rake angle machining, cutting resistance, increasing the cutting vibration, using a large positive rake angle machining, tool wear serious, cutting vibration as well. (2) After the corner, if after the angle increases, the tool edge strength is reduced, the flank wear area increases. After the tool angle is too large, the cutting vibration strengthened. (3) helix angle, helix angle is small, while the same cut on the cutting edge of the blade length the longest piece of graphite, the maximum cutting resistance, the cutting tool to withstand the maximum impact force, and thus tool wear, cutting force and cutting vibration are the largest . When the helix angle to the larger, the direction of the milling force large degree of deviation from the workpiece surface, chipping graphite material due to the impact caused by the cutting intensified, and thus tool wear, cutting force and cutting vibration it has also increased. Therefore, the tool angle change on the tool wear, cutting force and cutting vibration is rake angle, clearance angle and helix angle integrated generated, so the choice we must pay more attention. Through the processing characteristics of the graphite material lot of scientific tests, PARA optimize the tools that the tool geometry, so that the overall cutting tool is greatly increased. Three, coated diamond coated tool cutter high hardness, good wear resistance and low coefficient of friction, at this stage diamond-coated graphite machining tool is the best choice, but also the tool that best reflects the superior performance of graphite; diamond-coated carbide tools advantage is the combination of natural diamond carbide hardness and strength and fracture toughness; But in the domestic diamond coating technology is still in its infancy, as well as the cost of inputs are big, diamond coating so there is not much development in the near future, but we can on the basis of the common tool to optimize the angle of the tool, and the material so as to improve the structure of the conventional coatings in a way which can be processed in graphite Applications. Diamond-coated tools and the general geometry of coated tools are essentially different, so the design of diamond coated tools, due to the particularity of graphite machining, its geometry can be properly amplified volume becomes large cut groove, it will not reduce the wear resistance of the tool edge port; for ordinary TiAlN coating, although the ratio of its uncoated tool wear significantly improved, but compared to diamond coating, in the processing of its geometry graphite should be appropriate to put a small, in order to increase its wear resistance. The diamond coating, the coating of the world many companies invest a lot of manpower and material resources to research and development related to coating technology, but so far, foreign companies mature and economical coating confined to Europe; PARA as a subsection excellent graphite machining tool, also using the  circular blades world's most advanced coating technology for surface treatment of the tool, in order to ensure that the processing life while ensuring the economic and practical tool. 4, the tool edge enhancement tool edge passivation technology is one not to be widespread attention, but is a very important issue. After the diamond wheel grinding carbide tool edge, there is a different degree of micro-gap (ie micro chipping and saw cut). Graphite speed cutting machining tool performance and stability of the proposed higher requirements, especially in the coating of diamond coated tools must elapse before the knife edge passivation treatment in order to ensure the robustness and service life of the coating. Passivation purpose is to solve the above tool, the tool cutting edge grinding gap microscopic defects, to reduce or eliminate the peak value, to smooth smooth, strong and durable both sharp object.