DEVICE FOR HIGH-SPEED ARGON-ARC BUILD-UP OF CYLINDRICAL PARTS Russian patent published in 2010 - IPC B23K9/04 B23K9/12 

FIELD: technological processes.

SUBSTANCE: invention may be used to restore worn surfaces of cylindrical parts, and also to provide part surface with specific physical-mechanical properties in process of their manufacturing. Body 1 of cooled welding head has channel 18 for feeding filler wire into welding bath. In plane of head body inverted to processed part, recess 19 is arranged in the form of truncated cone side surface segment. In process of build-up, head is installed in transverse direction at the same distance from built-up part, and in axial direction - as inclined to the side of build-up along part axis. Pins 3 are evenly arranged around outlet of channel for feed of filler wire. Tungsten electrode used in device is arranged with blunt sharpening angle of 90-110° and with rounding radius on top of this angle equal to 0.5-0.75 of electrode diametre. Number of pins makes at least three, besides area occupied with them makes not more than 30% of their location circumference area.

EFFECT: improved efficiency of build-up process by provision of rational build-up thickness, reduced ridgeness of built-up layer, improved efficiency ratio of arc and prolonged service life of device with preservation of high process efficiency.

3 cl, 7 dwg