ROUND TOOLS NORTON WINTER PRECISION TECHNOLOGY TOOL GRINDING / 49 3. PROFILE GRINDING - CONDITIONING BY EDM Due to increasing tolerance and lifetime requirements in profile-generating grinding applications, the trend is towards increasingly wear-resistant grinding wheel specifications. In some cases, complex or highly accurate profiles are required on the grinding wheels. Furthermore, such profiles are also generated by CNC movements using simple radii or pointed profile wheels. The profiling of highly hard hybrid or metal bonds is very time-consuming, also with pointed profile wheels the pressure during profile grinding can cause the grinding wheel edge to break away. In addition, the grinding wheel layer has to been sharpened in most cases, which can again lead to a loss of accuracy. Furthermore, such hard bonds are often limited in their cutting efficiency. This is where the advantages of eroding grinding wheel layers become apparent, a clear gain in accuracy and economic efficiency is achieved. CNC-controlled EDM machines are usually used, whereby high profile accuracies can be achieved. As it is done without contact, there is no pressure on the grinding wheel layer. By resetting the bond, there is also no need for sharpening. However, there is the challenge of not resetting the bond of the grinding wheel too far, because in that case the diamond or cBN grit can no longer be held. Even with optimum parameters for EDM, a bond with maximum grain retention force is needed to achieve maximum tool life and cutting performance. For this purpose, we offer optimised hybrid bonds with the perfect combination of erodibility, profile retention and maximum cutting performance. Examples of use would be the production of various gear cutting tools such as carbide hobs or power skiving tools. ROUGHING D64 SP4300 FINISHING D15A….D20A SP4300
RkJQdWJsaXNoZXIy MTM0NjUyNQ==