MACHINE FOR CONTACT BUTT WELDING OF ROUND ARTICLES Russian patent published in 2012 - IPC B23K11/04 B23K37/08 

FIELD: process engineering.

SUBSTANCE: invention relates to contact butt welding and may be used in drawing for enlargement of wire coils or in construction for jointing reinforcing bars. Two end clamps are arranged on stationary and moving beds with top and bottom current conducting electrodes provided with half-sleeves from wear-resistant material with sharp edges on opposite sides. Device for electrode clamp and moving bed displacement comprises time relay, switch of compressed air feed into electrode clamp hydraulic cylinders, distributor of feeding compressed air into upset pneumatic cylinder and those of electrode clamp, as well as additional distributors of compressed air into every clamp pneumatic cylinder lifting chamber. The latter are furnished with fast-release valves communicated with clamping chambers to lessen clamping of one of electrodes and remove flash. All distributors are equipped with pilot-operated valves.

EFFECT: higher efficiency and quality.

3 dwg