Patent ID: 8226338

Claim:
A tip shaping apparatus for shaping a pair of electrode tips carried at root sections thereof by a welding gun for use in spot welding into reusable condition, each of which electrode tips being columnar in shape and including on a tip section a circular leading end surface for contact with a workpiece to be welded and an enlarging surface extending from an edge of the leading end surface to the root section while enlarging, the tip shaping apparatus comprising: a rotatable holder coaxial with the electrode tips; a shaping roller that is held by the holder and includes a shaping surface against which the tip section of the electrode tip is pressed to be shaped while the holder rotates; and a deburring section that is located, when the electrode tip is ejected after shaping operation, on a position confronting a burr which is formed on the electrode tip in such a manner as to project from an outer circumference of the root section of the electrode tip proximate the tip section toward a direction perpendicular to an axis of the electrode tip, wherein the deburring section is located proximate the outer circumference of the root section of the electrode tip undergoing shaping so as to contact with and cut off or bend the burr for suppressing a height of the burr from the outer circumference of the root section when the electrode tip is ejected.