Wear resistant insert for diamond abrasive cutter

摘要

A cutter bit includes a wear resistant element replaceably mounted to a front surface immediately below the cutting surface of the cutter bit. The body of the cutter bit is generally formed of a hardened steel, the cutting surface can be a diamond composition fixed in a step in the upper end of the cutter bit including side edges that taper laterally outwardly toward a lower edge of the cutting surface situated adjacent to the wear resistant element and the wear resistant element is preferably formed of a carbide composition or a sintered diamond composition. The wear resistant element can have an upper edge that closely conforms to the shape of an adjacent lower edge of the cutting surface, and can be coupled to a front end of a stem passing through an opening in the cutter bit immediately below the cutting surface, the opening being perpendicular to at least a portion of the back surface of the cutter bit.

主权项

1. A cutter bit and mounting block adapted to be fixed onto a working surface of a milling, planing, mining or reclaiming machine,
the mounting block comprising: a first side wall, a second side wall, and a top surface, the first and second side walls being parallel to one another and perpendicular to the top surface; a slot formed within the first side wall and extending through the top surface, the slot being rectangular and including first and second slot side walls, and a rear slot wall, the first and second slot side walls being parallel to one another and perpendicular to the rear slot wall, and the rear slot wall oriented at any angle relative to the first and second side walls of the mounting block; at least one pocket formed within one of the first and second side walls to intercept the slot, and a retainer positioned within each pocket, each retainer including a planar laterally tapered surface; and the cutter bit comprising a generally elongated body dimensioned to be removably mounted within the slot, the cutter bit having an upper end including a cutting surface, a front surface, and a back surface, a lower end including a surface having a portion engaged by the laterally tapered surface of each retainer to secure the cutter bit within the slot, and a wear resistant element replaceably mounted to the front surface between the cutting surface and the top surface of the mounting block, the wear resistant element formed with a first planar surface, and an opposing second planar surface and being disposed in a slot formed in the front surface adjacent the cutting surface so that the first planar surface is aligned in a same plane with a planar surface of the front surface of the cutter bit, and the second planar surface is contiguously coupled with a front end of a stem positioned in the slot between the second planar surface and the elongated body of the cutter bit.