Multipiece Cutting Edge Attachment For Spring Tines of a Harrow

摘要

A multi-piece cutting edge attachment for a circular shaft of a harrow tine features a mounting member formed of a material that is weldable to, and distinct from, a first material of the harrow tine. A cutting edge member is formed of a third material that is harder than the first and second materials and less weldable to harrow tine than the second material of the mounting member. The cutting edge member has a front face and an opposing rear face that is conformingly shaped for placement against a front face of the mounting member at a lower end thereof. The multi-piece arrangement forms a cutting edge of greater hardness than that which is achievable by a material directly attachable to the tine itself.

主权项

1. A cutting edge attachment for a circular shaft of a harrow tine formed of spring steel, the attachment comprising:
a prefabricated mounting member comprising a solid body having a predefined shape that is formed of chromium carbide and has a welded attachment to the spring steel of the harrow tine, the solid body having a front face and an opposing rear side, the rear side having a concavely arcuate curvature placed in conformance with a front surface of the circular shaft of the harrow tine adjacent a lower end thereof to position the front face of the mounting member in front of the front surface of the circular shaft; a cutting edge member of geometric shape and comprising tungsten carbide that is harder than the chromium carbide and spring steel and is brazed to the mounting member, the cutting edge member having a front face and an opposing rear face that is conformingly placed against the front face of the mounting member at a lower end thereof with a remainder of the cutting edge member residing in an exposed position in front of the prefabricated mounting member; whereby the welded attachment of the mounting member to the circular shaft of the spring steel harrow tine carries the cutting edge member in front of the lower end of the circular shaft of the harrow tine, where the front face of the cutting edge member forms a tungsten carbide cutting edge of greater hardness than both the harrow tine and the chromium carbide mounting member.