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Wednesday 08 October, 2014 | RSS Feed

Applications of PCD cutting tool

by Administrator | 620 comments

Polycrystalline diamond (PCD) cutting tool machining aluminum workpieces with long tool life, metal removal rate, etc., its drawback is that the tool is expensive, high processing costs. This is in the machinery manufacturing industry has formed a consensus. But in recent years the development and application of PCD tool has undergone many changes. Today's aluminum material has shrunk in terms of performance, in the processing of various newly developed aluminum alloy material (especially the high silica content of the composite material), in order to achieve optimal productivity and machining quality must be carefully selected PCD tool grades and geometry parameters to adapt to different processing requirements. Another change PCD tool is continuously reduce processing costs, manufacturing process improvements joint action in the market under competitive pressure and tool, PCD tool prices have dropped more than 50 percent. These trends lead to PCD cutting tools used in the processing of aluminum is increasing, and the applicability of the tool is limited by the constraints of different materials to be processed. 
     The basic features of PCD tool 
     PCD composite sheet with high hardness and mechanical properties is a unique mixture of diamond particles and a catalyst sintered at high temperature and pressure, the diamond particles were produced in the bio-synthesis process, the diamond particles, and a connection is established between the "bridge "PCD material to obtain a catalyst having an island structure, similar to the whole of diamond. PCD material structure and PCBN (polycrystalline cubic boron nitride) material is different. In PCBN material, no matter the actual bond between the CBN particles; while PCD there is a total of biological material, connected to each other through the lattice of diamond particles between the "bridge." 
     PCD cutting tool grades based on particle size diamond particles are classified. According to manufacturer's standard, fine particles and coarse particles of median particle grades PCD diamond size substantially corresponding respectively 2μm, 10μm and 25μm. Coarse particles are fine particles PCD PCD grades than higher grades of strength, wear better and have a longer working life in roughing, but the cutting edge of coarse particles PCD tool is difficult to achieve smoothness of the surface of fine particles of PCD tools. Therefore, the fine particles PCD tool for better surface finish, but wear faster.

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