工具損傷におよぼすブレーカ形状の影響について

概要

論文の詳細を見る
In continuous cutting operation, the use of chip breakers has become virtually important and much effort has been put into the development of a wide range of breakers to suit a wide cutting condition. Unexpected chipping will occur on the minor cutting edge, when as insert that has proper chip breaking performance is under optimum cutting condition. Then, the effect of chip breakers on the wear and chipping of inserts have been experimentaly investigated. The progress of crater wear is studied in details with the contour observation of five different chip breakers. The main results obtained are as follow; (1) The chip breaker patterns of tool face affect feed force and thrust force. In the case of the grooved chip breaker, the thrust force is larger than the obstruction type breaker. The chip breaker patterns do not affect the side flow angle if the cutting conditions are the same. (2) The forms of crater wear minor cutting edge chipping are significant influenced with the chip breaker patterns. If the projection of chip breakers is properly worn away with the progress of cutting time, the center of crater of the tool face moves away from the major and the minor cutting edges. The chipping of the minor cutting edge is easy to appear with a decrement in the wear of chip breaker projection.
山口大学の論文