Abrasive saw blade for trapezoidal grooving

DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT With reference to the drawings, and specifically FIG.
1, an abrasive saw blade constructed in accordance with the instant invention is generally shown at 10.
The saw blade includes a circular metal core or support disc 12 having a hole 14 in the center thereof for mounting the saw blade 10 on a mandrel (not shown) or other drive member.
The outer periphery of the metal core 12 is divided by a plurality of radially inwardly extending slots 16.
The slots 16 divide the plurality of the metal core 12 into a number of equally sized arcuate sections 18 each of which is adapted to receive an abrasive element.
The use of the slots 16 is conventional in the manufacture of abrasive cutting saws and such slots primarily serve the purpose of reducing thermally induced warpage during the manufacturing process.
An abrasive element is attached, as by welding to each of the arcuate sections 18 around the periphery of the metal core 12.
The abrasive elements include a first set of abrasive element 20 having a generally rectangular cross section as best shown in FIG.
2.
The rectangular abrasive element 20 includes generally parallel sides 21 as viewed in transverse cross section and a free end surface 24.
The width (w.
sub.
1) of the end surface 24 is substantially smaller than the thickness, or length, of the sides.
The abrasive element 20 comprises a mixture of abrasive particles, such as diamond particles, bound together in a matrix of sintered powder metal.
This abrasive element is made according to conventional techniques.
A preferred manufacturing technique involves bonding the abrasive element 20 to an arcuate steel back 22.
The steel back 22 is attached to the outer peripheral edge of the metal support disc 12 by means of welding or brazing.
As will be more thoroughly described herein the outer peripheral edge or surface 24 of the rectangular abrasive element 20 constitutes its working surface.
The abrasive saw blade also includes a second set of abrasive elements 26 having a generally trapezoidal, or truncated triangular, working portion as best shown in FIG