Abstract

A diamond tool is combined with a processing apparatus to process a workpiece. The diamond tool includes a shank, a segment, and an abrasion preventing part. The shank has a throughhole through which grinding powder generated during processing the workpiece by the processing apparatus is discharged outside. The segment is bonded to an end portion of the shank. The segment contacts and processes the workpiece. The abrasion preventing part is disposed on an adjacent portion among an outer surface of the shank adjacent to the throughhole to prevent abrasion of the outer surface during the processing of the workpiece.

IPC Classes  ?

• B24D 5/06 - Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their peripheryBushings or mountings therefor with inserted abrasive blocks, e.g. segmental

Abstract

The present invention relates to a saw blade having a noise and stress-reduction structure, the saw blade having a structure in which a plurality of diamond segments are mounted at a first unit and the first unit has a second unit, thereby reducing the noise generated during a cutting operation, while increasing heating performance with a relatively simple configuration, and simultaneously dispersing impact stress so as to prevent the occurrence of cracks.

IPC Classes  ?

• B28D 1/04 - Working stone or stone-like materials, e.g. brick, concrete, not provided for elsewhereMachines, devices, tools therefor by sawing with circular saw blades or saw discs
• B23D 61/18 - Sawing tools of special type, e.g. wire saw strands, saw blades or saw wire equipped with diamonds or other abrasive particles in selected individual positions
• B23D 47/00 - Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts

Abstract

The present invention relates to a diamond tool and a method of manufacturing the same, wherein multiple abrasive layers are formed through a brazing or electroplating method, thereby improving the performance and service life of the tool. According to the method of the present invention, a plurality of concave portions are formed in a surface of the shank. A bonding paste is coated into the concave portions and abrasives are dispersed in the bonding paste to thereby form a lower abrasive layer. Again, a bonding material is coated on the lower abrasive layer and abrasives are dispersed in the bonding material to thereby form an upper abrasive layer. Then, a heat treatment is executed to fusion-bond the bonding material and abrasives onto the surface of the shank. Therefore, the diamond tools manufactured through a multiple brazing or electroplating method according to the invention can significantly extend the service life thereof, which has been a detrimental weakness of the conventional diamond tools having a single abrasive layer, in spite of various advantages of the brazing and electroplating methods. Furthermore, multiple abrasive layers can be formed inside the concave portions having a desired spacing, width and depth, thereby significantly improving the service life and the cutting performance of diamond tools.

IPC Classes  ?

• B24B 1/00 - Processes of grinding or polishingUse of auxiliary equipment in connection with such processes
• B24D 11/00 - Constructional features of flexible abrasive materialsSpecial features in the manufacture of such materials
• B24D 3/00 - Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special natureAbrasive bodies or sheets characterised by their constituents
• B24D 18/00 - Manufacture of grinding tools, e.g. wheels, not otherwise provided for