FIELD: process engineering.
SUBSTANCE: invention relates to pipe rolling and can be used for production of pipes with wall depth of 12-25 mm at PRU 8-16'' with Pilger mills. Roll comprises 1150 mm diameter body with round-cross-section pass with tangential tapers. It consists of flat die with central angle of 80 degrees composed by roll flange radius on increasing value and finishing section with central roll of 90 degrees. Lengthwise taper section features central angle of 40 degrees and idle section with central angle of 150 degrees. Note here that angles of transverse tapers at flat die section from zero point to 20 degrees central angle are invariable and equal to 36°, at next flat die section with central angle of 20-60 degrees with transition to finishing section with central angle of 10° they are smoothly decreasing from 36 to 22 degrees, at finishing section with central angle 80° they are invariable and equal to 22°, at lengthwise taper 40° with transition to idle section with central angle of 20° they are smoothly increasing from 22 to 36 degrees, and, further, at idle section with central angle of 140° with transition to flat die with central angle of 20 degrees they are invariable and equal to 36°.
EFFECT: higher precision of pipe wall thickness, lower metal input.
2 cl, 1 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| ROLL OF PILGER MILL FOR ROLLING OF THIN-WALL TUBES WITH DIAMETER OF 508 MM WITH INCREASED ACCURACY AS TO WALL | 2013 |
|
RU2542131C1 |
| ROLL OF PILGER MILL FOR ROLLING SEAMLESS HOT-ROLLED 610×28-32 AND 630×28-32 mm PIPES FOR PIPELINES OF BOILER UNIT INERMEDIATE STEAM SUPERHEATING FROM ESR "690×bh590×3300-3500", "700×bh580×3200±50" AND "720×bh600×3200±50" mm SLEEVES AND HOLLOW INGOTS | 2012 |
|
RU2523379C2 |
| PRODUCTION OF 245-630 MM DIAMETER 8-90 MM DEEP WALL SEAMLESS HOT-ROLLED PIPES AT PIPE ROLLING PLANT 8-16'' WITH PILGER MILLS | 2012 |
|
RU2518364C1 |
| PILGER MILL ROLL FOR HOT ROLLING OF 610×28-40 mm PIPES | 2013 |
|
RU2527516C1 |
| PRODUCTION OF SEAMLESS HOT-ROLLED 550×25 mm PIPES AT 8-16" PRU WITH PILGER MILLS | 2012 |
|
RU2547973C2 |
| PILGER MILL ROLL FOR HOT ROLLING OF 610(10-40mm-PIPES | 2013 |
|
RU2537342C2 |
| 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 |
| ROLL OF PILGER MILL FOR ROLLING OF HEAVY-WALL 630×56 mm PIPES OF HARDLY-DEFORMED STEEL AND ALLOY GRADES FOR NUCLEAR POWER PRODUCTION STRUCTURES FROM ESR SLEEVES AND HOLLOW INGOTS SIZED TO 690-720×70-90×3400 mm | 2013 |
|
RU2545932C2 |
| PILGER MILL ROLL FOR ROLLING 630×28 mm "09Г2С" STEEL FOR GAS PIPES OF GAS LIFT SYSTEMS AND GAS FIELD CONSTRUCTION FROM HOLLOW INGOTS OF ELECTROSLAG REMELTING SIZED TO "720×65×3400±50" mm | 2013 |
|
RU2527828C1 |
| PILGER MILL ROLL FOR 273-630 MM DIAMETER PIPES ROLLING | 2014 |
|
RU2564503C2 |
