WO2000048757A1 - Wear resistant taper sleeve - Google Patents
Wear resistant taper sleeve Download PDFInfo
- Publication number
- WO2000048757A1 WO2000048757A1 PCT/US2000/003786 US0003786W WO0048757A1 WO 2000048757 A1 WO2000048757 A1 WO 2000048757A1 US 0003786 W US0003786 W US 0003786W WO 0048757 A1 WO0048757 A1 WO 0048757A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sleeve
- roll
- neck section
- wear resistant
- nitride
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
- B21B27/03—Sleeved rolls
- B21B27/035—Rolls for bars, rods, rounds, tubes, wire or the like
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
- F16D1/08—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key
- F16D1/09—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping due to axial loading of at least one pair of conical surfaces
- F16D1/093—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping due to axial loading of at least one pair of conical surfaces using one or more elastic segmented conical rings forming at least one of the conical surfaces, the rings being expanded or contracted to effect clamping
- F16D1/097—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping due to axial loading of at least one pair of conical surfaces using one or more elastic segmented conical rings forming at least one of the conical surfaces, the rings being expanded or contracted to effect clamping with clamping effected by ring expansion only, e.g. with an expanded ring located between hub and shaft
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
- B21B13/005—Cantilevered roll stands
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
- B21B31/16—Adjusting or positioning rolls
- B21B31/20—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis
- B21B31/22—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis mechanically, e.g. by thrust blocks, inserts for removal
- B21B31/26—Adjusting eccentrically-mounted roll bearings
Definitions
- This invention relates generally to rolling mills having work rolls mounted in cantilever fashion on the ends of roll shafts, and is concerned in particular with an improvement in the tapered sleeves used to secure such rolls on taper neck sections of the roll shafts.
- ring-shaped carbide work rolls are mounted in cantilever fashion on the exposed ends of roll shafts.
- the shaft axes of successive roll pairs are offset by 90° to effect twist free rolling.
- the work rolls have grooved outer surfaces, and smooth cylindrical bores received on tapered neck sections of the roll shafts.
- Taper sleeves are inserted between the tapered shaft neck sections and the cylindrical roll bores. The taper sleeves serve to concentrically locate and radially support the work rolls, and to transmit torque from the roll shafts to the rolls.
- the objective of the present invention is to significantly increase useful sleeve life, thereby providing mill operators with a beneficial savings in operating costs.
- a wear and corrosion resistant coating is applied to at least the critical interior and exterior sleeve surfaces in contact respectively with the tapered neck section of the roll shaft and the cylindrical roll bore.
- the coating is selected from the group consisting of titanium nitride, titanium carbonitride and chrome nitride, with titanium nitride being preferred, and with the coating being applied to an optimum thickness to achieve the desired result, typically not more than about 0.0025mm.
- the resulting increase in surface hardness significantly improves resistance to wear, pitting and corrosion.
- Figure 1 is a sectional view taken through a typical cantilevered roll mounting assembly
- Figure 2 is a partial longitudinal sectional view on an enlarged scale of the tapered sleeve shown in Figure 1 , with the wear resistant coating thickness exaggerated for purposes of illustration.
- a typical cantilevered roll mounting assembly is generally depicted at 10 comprising a roll shaft 12 journalled for rotation in a sleeve bearing 14 fixed within an eccentrically bored cartridge 16.
- the cartridge 16 is in turn rotatably supported in a roll housing 18.
- the roll shaft has a tapered neck section 20 leading to a reduced diameter end 22.
- a ring-shaped carbide roll 24 has a cylindrical bore 26 and an outer surface grooved as at 28.
- the roll 24 is mounted on the shaft 12 by means of a taper sleeve 30 axially wedged between the roll bore 26 and the tapered neck section 20.
- a seal end plate 32 and seal assembly 34 serve to retain lubricant in the housing 18 while excluding external contaminants such as cooling water and entrained dirt and mill scale.
- An end cover 36 and retaining bolt 38 completes the assembly.
- the sleeve 30 locates the roll 24 concentrically on the tapered neck section 20, provides radial support for the roll, and also serves as the means for transmitting torque from the shaft 12 to the roll.
- Each of these functions is dependent upon a precise fit between the tapered neck section 20 and the tapered interior surface 40 of the sleeve, as well as between the cylindrical outer surface 42 of the sleeve and the cylindrical bore 26 of the roll.
- the sleeves are typically machined from alloyed carbon steel or stainless steel, with a through hardness of about 360-380 BHN. As mentioned previously, useful sleeve life during normal service will typically range from 6-12 months. If sleeves are allowed to remain in service for longer periods, roll slippage and/or breakage may occur because of sleeve wear.
- a wear resistant coating 44 is applied to at least the sleeve surfaces 40 and 42.
- the coating material is selected from the group consisting of titanium nitride, titanium carbonitride and chrome nitride, with titanium nitride being preferred.
- Coatings are applied to a thickness which is sufficient to achieve the desired hardness and resistance to wear, and preferably does not exceed about 0.0025mm, resulting in an increase in surface hardness to at least about 700 BHN.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU33639/00A AU3363900A (en) | 1999-02-18 | 2000-02-14 | Wear resistant taper sleeve |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12057299P | 1999-02-18 | 1999-02-18 | |
US60/120,572 | 1999-02-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000048757A1 true WO2000048757A1 (en) | 2000-08-24 |
Family
ID=22391178
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2000/003786 WO2000048757A1 (en) | 1999-02-18 | 2000-02-14 | Wear resistant taper sleeve |
Country Status (2)
Country | Link |
---|---|
AU (1) | AU3363900A (en) |
WO (1) | WO2000048757A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002002252A1 (en) * | 2000-07-04 | 2002-01-10 | Scientific And Production Enterprise 'etalon', Ltd. | Forming roll |
WO2015052045A1 (en) * | 2013-10-07 | 2015-04-16 | Voith Patent Gmbh | Pin receiving portion for a hub, in particular in a rolling mill |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3974555A (en) * | 1974-05-20 | 1976-08-17 | Schwarzkopf Development Corporation | Rolls for rolling mills and method for making same |
DE2832966A1 (en) * | 1978-07-27 | 1980-02-21 | Schloemann Siemag Ag | Rolling mill forming roller coupling - has intermediate bush and roller forming clearance fit on shaft |
DE3600445A1 (en) * | 1985-01-11 | 1986-07-17 | Sig Schweizerische Industrie-Gesellschaft, Neuhausen Am Rheinfall | Centring device for cutting keyways in tubular objects |
DE4006550C1 (en) * | 1990-02-15 | 1991-06-27 | Anke Gmbh & Co. Kg Oberflaechentechnik, 4300 Essen, De | Textured rolls for processing steel etc. - have electrolytical treated, surface deposited with chromium coated with nitride by PVD or CVD |
-
2000
- 2000-02-14 WO PCT/US2000/003786 patent/WO2000048757A1/en active Application Filing
- 2000-02-14 AU AU33639/00A patent/AU3363900A/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3974555A (en) * | 1974-05-20 | 1976-08-17 | Schwarzkopf Development Corporation | Rolls for rolling mills and method for making same |
DE2832966A1 (en) * | 1978-07-27 | 1980-02-21 | Schloemann Siemag Ag | Rolling mill forming roller coupling - has intermediate bush and roller forming clearance fit on shaft |
DE3600445A1 (en) * | 1985-01-11 | 1986-07-17 | Sig Schweizerische Industrie-Gesellschaft, Neuhausen Am Rheinfall | Centring device for cutting keyways in tubular objects |
DE4006550C1 (en) * | 1990-02-15 | 1991-06-27 | Anke Gmbh & Co. Kg Oberflaechentechnik, 4300 Essen, De | Textured rolls for processing steel etc. - have electrolytical treated, surface deposited with chromium coated with nitride by PVD or CVD |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002002252A1 (en) * | 2000-07-04 | 2002-01-10 | Scientific And Production Enterprise 'etalon', Ltd. | Forming roll |
WO2015052045A1 (en) * | 2013-10-07 | 2015-04-16 | Voith Patent Gmbh | Pin receiving portion for a hub, in particular in a rolling mill |
CN105636714A (en) * | 2013-10-07 | 2016-06-01 | 福伊特专利有限公司 | Pin receiving portion for a hub, in particular in a rolling mill |
Also Published As
Publication number | Publication date |
---|---|
AU3363900A (en) | 2000-09-04 |
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