Controlled Depth Machining with Abrasive-Waterjets. Phase 2

摘要

The process of milling with abrasive-waterjets (AWJs) has been experimentally andanalytically investigated. In the process, the depth of penetration needs to be accurately controlled. A number of concepts were evaluated to mill pockets and remove surface areas from hard-to-machine materials. It was found that applying the jet at impact and rake angles is significantly better than applying it at normal angles. The approach is very beneficial for surface removal applications. A rotary AWJ tool was built and used to mill slots in glass. The method offers high volume removal rates but does not allow much control over the depth of the cavity. The dynamic real-time manipulation of jet parameters to control jet structure and effectiveness proved to be inadequate, due to the fast response time required from control devices. The use of high traverse rates and a mask was found to be the most practical approach. Cavities with a depth accuracy of 0.001 inch were milled in metal matrix composites and glass.