| 摘要 |
What is provided is a tip dresser (10) capable of smoothly discharging shavings (70) by a breaker (60) provided on a cutter (40). The tip dresser includes a cutter (40) having cutting blades (47) for cutting the tip end portions (2) of a pair of electrode tips (1) and an attaching hole (50), a holder (20) to which the cutter is attached by screwing an attaching screw (55) inserted through the attaching hole, and a rotary drive portion that holds rotatably the holder. On the surface side (46) of the cutter, the breaker (60) for discharging shavings is disposed. The breaker is formed into a plate shape having an insertion hole (62) through which the attaching screw is inserted to tighten the breaker together with the cutter by an attaching screw. The breaker has, on the periphery of an attaching substrate portion (61) extending in a substantially plane shape from the peripheral edge of the insertion hole, inclined guide surfaces (65) that guide the shavings (70) produced from the portions of the cutting blades away from the surface side (46) are formed to bulge from flat portions (49) near the cutting blades while inclining from the flat portions. |
