FIELD: metallurgy.
SUBSTANCE: invention may be used on tube-rolling installations with pilgrim mills for rolling of pipes with size 377×9-16 and 426×9-18 mm. The roll of the pilgrim mill comprises along the barrel circumference a stream of round section with tangential transverse outlets, made of a serially arranged striker with an angle Θs=100°, formed by a radius of the roller ridge with increased value, a polishing section with an angle Θp=70°, an angle of the longitudinal outlet with an angle Θl.o.=40° and an idle section with an angle Θi=150°. The angle of the tangential transverse outlet on the striker from the point "0" to the beginning of the polishing one is made as gradually reducing from 35° to 20-22°. The polishing section has permanent or gradually increasing cross-section. The angle of the tangential transverse outlet on the polishing section is made permanent and is equal to 20-22°. The angle of the longitudinal outlet is made with gradually increasing tangential transverse outlets from 20-22 to 35° and increase of the calibre diameter by 12.2 mm, and the idle section is made with tangential transverse outlets equal to 35°.
EFFECT: reduced longitudinal non-uniformity of pipe thickness, local curvature per one running metre, number of cuts and metal consumption coefficient.
1 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| ROLL OF PILGER MILL FOR ROLLING THIN-WALL TUBES | 2005 |
|
RU2294250C2 |
| PILGER MILL ROLL FOR 273-630 MM DIAMETER PIPES ROLLING | 2014 |
|
RU2564503C2 |
| PREPARATION OF PILGER MILL ROLLS FOR HOT-ROLLED PIPES ROLLING | 2013 |
|
RU2545890C2 |
| PRODUCTION OF SEAMLESS COLD-RESISTANT AND NONCORROSIVE 377×9-16 AND 426×9-18 mm PIPES AT PRU 8-16 WITH PILGER MILLS WITH STRINGENT REQUIREMENTS TO CURVATURE | 2013 |
|
RU2542150C2 |
| PRODUCTION OF 273-630 MM DIAMETER 8-90 MM DEEP WALL SEAMLESS HOT-ROLLED PIPES AT PIPE ROLLING PLANT 8-16'' WITH PILGER MILLS | 2012 |
|
RU2519195C1 |
| ROLL OF PILGER MILL FOR ROLLING OF THIN-WALL TUBES WITH DIAMETER OF 508 MM WITH INCREASED ACCURACY AS TO WALL | 2013 |
|
RU2542131C1 |
| PILGER MILL ROLL FOR HOT ROLLING OF 610(10-40mm-PIPES | 2013 |
|
RU2537342C2 |
| PILGER MILL ROLL FOR HOT ROLLING OF 530 AND 550 MM THIN-WALL PIPES | 2013 |
|
RU2537637C2 |
| ROLL OF PILGRIM MILL FOR ROLLING OF TUBE STOCKS WITH SIZE 290H11-12 MM FROM LOW-DUCTILE BORON-CONTAINING STEELS OF GRADES 04H14T3R1F-SH AND 04H14T5R2F-SH | 2012 |
|
RU2516148C1 |
| METHOD FOR CALIBRATING ROLLS OF PILGER MILLS FOR ROLLING THIN-WALL TUBES | 2003 |
|
RU2243045C2 |
