| 摘要 |
<p>The invention relates to an improved saw of the type in which bonded abrasive beads are attached at intervals along the length of a wire such as a steel wire rope. The improvement comprises using beads having an external profile which presents fewer potential lines of contact or a reduced contact area between bead and material to be cut during the initial period of use when the surface coating of bond matrix is being worn away. The external profile of the beads (11 to 17, 21 to 25, 33, 34) may be, for example, polygonal (11 to 16) in transverse section relative to the length of the wire (19) or frusto-conical (33, 34) or of re-entrant profile (27 to 31) in the longitudinal direction of the wire (26, 32). <IMAGE></p> |
