FIELD: machine building.
SUBSTANCE: invention can be used in contact spot welding, in particular, sheet workpieces of cabins, bodies, car doors. Hollow base of the cap electrode is configured to cover the side surface of the holder. Working part of electrode-cap is made in the form of cylinder or truncated cone, which has front flat end with diameter equal to diameter of welded point, conjugated with convex radius with side surface of working part. Working part of electrode-cap has length of not less than 2.5 of diameter of said flat end, and hollow base of electrode-cap on side of its working part has wall, thickness of which does not exceed 3 mm.
EFFECT: electrode-cap has high durability; at that, complete use of electrode front part is provided at its restoration after each limit wear.
1 cl, 1 dwg
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