| 摘要 |
PURPOSE:To prolong the life of a cutting blade by improving the surface roughness of a cutting plane and cutting speed, preventing the occurrence of abnormal abrasion and partial abrasion in cutting and recessing works for glass, ceramics and the like. CONSTITUTION:The provision of layers composed of intermediate sized abrasive grains 7, and of small sized abrasive grains 3, which are provided in the aforesaid order over both the surfaces of a blade 1 having a tapered angle extended to the outer circumferential side where the aforesaid blade is composed of large sized abrasive grains 13, prevents the occurrence of abnormal abrasion and partial abrasion caused by the rapid abrasion of abrasive grains. Energy due to collision when the blade comes in contact with the cutting plane of a work substrate, can be absorbed by providing a small sized abrasive grain layer including a plurality of shock absorbing materials for both the sides of the blade 1 composed of large sized abrasive grains 13, so that excessive friction with the cutting plane can thereby be prevented. Besides, a negative electrode is divided in plural numbers in the thickness direction of the cutting blade by each insulating layer, an electrolytic dressing function is imparted to the outer circumferential centers and side surfaces of the cutting blade 1, so that high accuracy and its longer life can thereby be achieved. |
