Abstract
This paper reports that the effect of cumulative number of time of pulse discharge on the deburring for SUS burrs of micro order in the tip of medical implant by the underwater explosion loading induced by the pulse discharge into the burrs attached without and with microbubbles. The high repetition frequency of pulse discharge was set to be 10 PPS. The microbubble diameter of 40 μm was generated by the pressurization-bubbling method with the microbubble generator. The height distributions of the burrs and implant surface were measured by the 3-D digital microscope before and after the pulse discharge. The maximum height was decreased as the increased cumulative pulse discharge shot, and a part of burrs was disintegrated by the underwater explosion loading when the discharge shot was about 4000 without attaching microbubbles on the implant. The maximum height of burrs with attaching microbubbles subjected to the pulse discharge was more decreased than that without microbubble in the 4000 discharge shots. These results of this study suggested that the increase of cumulative discharge shot and the attaching microbubble on the burrs was useful to the promotion of deburring the remaining metal burrs of micro order in the implant.
