Manufacture ofcarbide cutting toolswith diamond grinding process can make the physical mechanical properties of the tool surface layer to improve. Bad or UWIE212 type CNC tools in the German SAACKE company (15kW) on the whole grinder grinding cemented carbide spiral edged cutter as an example, the process of coarse slotting (Mo Goucao) diamond wheel line speed 14 ~ 20m/s the feeding speed of the machine tool, the axial selection of 50 ~ 200mm/min, the radial feed amount of coarse grinding machine 210 ~ 510mm, 0.2 ~ 0.5mm grinding; open tooth process (before and after the blade end, cogging, partial back margin processes collectively) diamond wheel line speed of 14 ~ 24m/s, axial feeding speed of the machine tool selection from 100 to 400m/min radial feed machine, coarse grinding 0.3 ~ 1.0mm, 0.05 ~ 0.1mm. grinding mill and cutter face adopt the feed return light grinding to improve its surface roughness.Such as imported grinding wheel, allowing selection The grinding wheel speed and the radial feed rate are higher than the domestic grinding wheel.

Verification of the effect of grinding process improvement measures

More than 6800 pieces of whole cemented carbide cutter grinding process improved (of which there are nearly 4000 pieces of high speed milling cutter) using the same after emulsification fluorescence penetrant detection method for testing.The results show that not only the tool grinding surface quality greatly improved,grinding crack rate of nearly 20% by the process improvement before gradually reduce for improved process 15% 10%, 6%, 0.5%, until the best improvement process, grinding tool surface burns (not shiny, pale and blue, purple, brown, yellow, black, dark) and surface roughness (Rz0.2 ~ 0.8 m) also significantly improved; and the grinding efficiency is increased, the diameter of 20mm edged the whole cemented carbide high speed milling cutter as an example, the process improvement before the completion of each tool grinding 30 ~ 40min,the improved process is only 20 ~ 30min,if the better quality of the imported cooling oil and imported diamond sand The grinding efficiency of the optimum process can be increased to 14 ~ 20min.

All in all,the main reason for grinding cracks of solid carbide cutting toolsfor grinding process and inappropriate parameters lead to local instantaneous temperature grinding contact zone caused by high near surface layer of high tensile stress value exceeds the breaking strength of materials.

The hydrophilic high sensitivity after emulsification fluorescence penetrant flaw detection method can effectively detect the whole cemented carbide cutter grinding cracks;recommend the method widely used in the whole cemented carbide tools technical field of quality assurance.

By improving and optimizing the grinding process and the grinding parameters of the solid carbide tools, it can effectively prevent the grinding cracks and grinding burn.

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