FIELD: process engineering.
SUBSTANCE: proposed mandrel consists of cylindrical belt and working tapered part. Improved conditions of pipe gripping by rolls and decrease irregularity of strain are ensured by making mandrel working tapered part with taper angle of 7-8° and, mandrel proper, from alloyed tool steel containing the following substances, in wt %: carbon - 1.7-1.7, chromium - 14-17, nickel - 0.7-1.1, manganese - 0.3-0.7.
EFFECT: higher durability of mandrel and pipe inner surfaces.
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF FABRICATING WORK HOLDERS OF TUBE MILLS AT LENGTHWISE TUBE ROLLING | 2006 |
|
RU2327749C1 |
| METHOD FOR PRODUCTION OF STEEL PIPES FROM LOW-ALLOYED HARDLY DEFORMED AND CARBON GRADES OF STEEL | 2007 |
|
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|
RU2362639C1 |
| SCREW ROLLING MILL MANDREL FOR PIERCING WORKPIECES MADE OF ALLOYED, HIGH-CHROMIUM AND STAINLESS GRADES OF STEEL | 2022 |
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| METHOD OF HOT-ROLLED PIPE PRODUCTION | 2012 |
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|
RU2386496C2 |
| STEEL | 1991 |
|
RU2020186C1 |
| 0 |
|
SU111972A1 | |
| 0 |
|
SU522868A1 |
