This paper discusses the abrasive waterjet cutting (AWJ) beyond 400 Mpa (= 4000 bar), which is the limit pressure for the most of the waterjet cutting systems. The AWJ cutting process is well established up to 400 Mpa. Many cutting models were developed based on different principles, and they are validated by the cutting data generated at the current pressure limits. In this study, validity of the previous cutting models was tested up to 700 Mpa and the process parameters were adjusted to the higher pressures. The abrasive consumption was discussed in detail. It was figured out that the available cutting models are capable of describing the cutting process beyond 400 Mpa. The optimum abrasive flow rate increases as the pressure increases to keep the abrasive load ratio constant. It is also possible to reduce the abrasive usage around 50% while maintaining the cutting speed and the surface roughness.
展开▼
