FIELD: mechanical engineering; automatic and semi-automatic consumable electrode arc welders. SUBSTANCE: device has electric motor 1 with hollow shaft 2. Wire feed mechanism is rigidly secured on end of shaft. Mechanism is made in form of cams 10 and holder 6 with shaped surfaces with guides in form of part of Archimedean spiral. Surface engage with surfaces 9 of cams 10 at rotation of shaft 2. Screw cut is made of surfaces 12 of cams 10 to engage with welding wire 5. EFFECT: simplified design, enhanced reliability of operation. 2 dwg
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