Welding tip dresser

In a dresser for shaping the product-contacting tip of a worn, elongated cylindrical electrode while it is mounted on an arm of a spot-welding machine to essentially restore a welding face of the tip to its physical condition prior to use and wear;

• said dresser comprising an elongated cutting tool, a holder for receiving and supporting said tool, and a motive means for unidirectionally rotating said holder and tool about a point on said face during dressing, said holder including a central cylindrical opening for receiving a welding tip to be dressed and a pair of opposed slots across said opening for receiving the ends of said elongated tool in bridging fashion, the improvement comprising:
• said tool having opposed sides one of which lies in a plane extending in the direction of receipt of an electrode and being located essentially on a crosswise centerline of said cylindrical opening,
• said tool further having an edge essentially facing an electrode to be dressed, said edge and said one side being at an acute angle to form a sharp, raked cutting edge,
• said cutting edge further extending from the inner surface of said opening to a point beyond the axis of said opening whereby rotation of the leading cutting edge of said tool into the tip dresses the tip of said electrode and restores its welding face to its original condition.