| 摘要 |
PURPOSE:To enable a tip saw to sustain its incisiveness for a long period even it is used for cutting a synthetic resin sheet-like material which has a high hardness due to inclusion of additives, by severing the synthetic resin sheet material with the use of a tip saw provided with diamond chips in part or all. CONSTITUTION:It is desirable that diamond chips are used for 20-50% of all tips T, and ultrahard alloy chips are used for the remaining tips T. Since diamond chips are used, there is no such a troublesome work that a workpiece is severed while the tip saw is cooled by cooling liquid and as well there is no such a risk that the workpiece is not satisfactorily finished due to occurrence of adhesion or burning. Further, it has a wear-resistance which is forty times greater than that of a ultrahard alloy tip saw, and the allowable number of reformation of the instant tip saw by polishing is more than 10 while that of the ultrahard alloy tip saw is few. Accordingly, the instant tip saw may be used for a long period with incisiveness. |
