GB2430173A - Ring rolling from metal blanks - Google Patents
Ring rolling from metal blanks Download PDFInfo
- Publication number
- GB2430173A GB2430173A GB0516221A GB0516221A GB2430173A GB 2430173 A GB2430173 A GB 2430173A GB 0516221 A GB0516221 A GB 0516221A GB 0516221 A GB0516221 A GB 0516221A GB 2430173 A GB2430173 A GB 2430173A
- Authority
- GB
- United Kingdom
- Prior art keywords
- growth control
- rolls
- mandrel axis
- axis
- mandrel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H1/00—Making articles shaped as bodies of revolution
- B21H1/06—Making articles shaped as bodies of revolution rings of restricted axial length
- B21H1/12—Making articles shaped as bodies of revolution rings of restricted axial length rings for ball or roller bearings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Metal Rolling (AREA)
Abstract
A method of rolling a ring from a metal blank comprises mounting the blank (2) on a mandrel (4) between two forming rolls (6) located on opposite sides of the mandrel axis. A pair of lower growth control rolls (12) are located below and with their axes parallel to and on opposite sides of the mandrel axis (8), and a pair of upper growth control rolls (16) are arranged above and with their axes parallel and on opposite sides of the mandrel axis (8). The spacing between the pair of upper growth control rolls is different from that between the pair of lower growth control rolls. As the ring is rolled, both the forming rolls and the growth control rolls are engaged with it. In a modification of the method, the upper growth control rolls are replaced by a single roll (20) with its axis disposed directly over the mandrel axis.
Description
I
Ring Rolling From Metal Blanks This invention relates to the ring rolling of metal blanks. The blanks are typically of standard steels such as wrought steels, but could comprise other metals or alloys. They can be rolled to form rings having many uses, particularly bearing components. The invention may also be applied to powder metal blanks.
In rolling processes of the kind described above, the metal blank is mounted on a mandrel located between two forming rolls either side of the mandrel axis. Growth control rolls are disposed above and below the mandrel axis to engage the blank as it turns between the forming rolls. Four growth roll controls are used; bne directly above another between the mandrel axis and each forming roll. This process has produced good results with very good quality roundness in the final product. However, the process does generate lobes. The present invention seeks to further reduce the generation of lobes, and thereby further improve the roundness of the ring rolled product.
According to the invention, the growth control rolls are arranged above, below and on either side of the mandrel axis to generate a less symmetric pattern of forces acting on the ring blank with more of the horizontal forces being resolved between the upper or the lower growth control rolls and the forming rolls. The preferred arrangement has the pair of upper growth control rolls with their axes parallel to but closer than those of the lower rolls. However, for some applications of the invention the lower pair of growth control rolls can be closer together than the upper pair.
In the method of the invention the upper and lower growth control rolls will normally be arranged with their axes equidistant on either side of the vertical plane containing the mandrel axis. In one variant of the invention, the two upper growth controls can be replaced by a single growth control with its axis disposed directly over the mandrel axis. In this variant, the upper growth control does of course apply only vertical forces to the ring blank with all the horizontal forces being resolved between the lower growth control rolls and the forming rolls. The disposition of the growth control rolls is preferably selected to minimise the length of unsupported blank between peripherally adjacent rolls (forming rolls and growth control rolls).
In the methods of the invention, the mandrel axis and the forming rolls are in the same horizontal plane. However, in some applications of the invention there can be some benefit in locating the mandrel axis below the axes of the forming rolls so that there is a vertical component of the forces between the forming rolls and the ring blank.
The invention will now be described by way of example and with reference to the accompanying schematic drawings in which: Figure 1 shows a crosssection through ring rolling apparatus adapted to practice the method of the invention; and Figure 2 shows an alternative apparatus to that of Figure 1 in which the upper growth controls are replaced by a single roll.
As shown in Figure 1 a metal blank (2) is mounted on a mandrel (4) disposed between two forming rolls (6). The axis (8) of the mandrel (4) is located below the horizontal plane containing the axes (10) of the forming rolls, the line between the axis (8) and each forming roll axis (10) subtending an angle 3 with the horizontal. Angle is normally no more than 100, preferably no more than 50 Two lower growth control rolls (12) are disposed beneath the mandrel (4) to engage the metal blank (2) from below. The rolls (12) are arranged symmetrically on either side of the vertical plane containing the mandrel axis (8); equally spaced from that vertical plane. The rolls (12) are mounted on a framework (14) enabling their spacing to be adjusted. It will be appreciated that the diameter of the lower growth control rolls may need to vary depending upon the spacing between them, to avoid interference with either each other or the forming rolls. The critical factor is of course the line of engagement with the blank on the mandrel, and the angle 0 subtended between the line of engagement and the mandrel axis and the horizontal. This angle 0 is typically in the range of 50 to 700, and preferably substantially 600.
Two upper growth control rolls (16) are mounted in a framework (18) over the mandrel axis for engaging the blank (2) from above. These rolls (16) are located closer to each other than are the lower growth control (12) but once again their spacing can be altered by movement of their axes in the framework (18). The rolls (16) are also arranged symmetrically on either side of the vertical plane containing the mandrel axis, and the angIe 0' subtended by the line of engagement of the roll (16) and the blank (2) and the mandrel axis relative to the horizontal will of course be greater than the angIe 0 defined in the location of the lower growth controls. The angle 0' is typically in the range of 50 to 80 , preferably around 750* As noted above different sized growth control rolls can be used depending upon the geometry of the desired roll arrangement and of course the size of the ring to be rolled on the forming rolls. Because of the forces involved, the diameter of the growth control rolls should be as much as the geometry allows. The location of the growth control rolls relative to the blank is normally selected such that the spacing between the lines of engagement of the upper rolls (16) is substantially equal to the spacing between each upper roll and the line of engagement of the adjacent forming roll (6). The lower growth control rolls (12) are located in a similarly symmetric arrangement.
Figure 2 shows a modification of the arrangement in Figure 1 in which the upper growth control rolls (16) are replaced by a single roll (20). In other respects the arrangement of forming and growth control rolls is the same as in Figure 1.
Claims (11)
1. A method of rolling a ring from a metal blank, comprising mounting the blank on a mandrel between two forming rolls located on opposite sides of the mandrel axis, with a pair of lower growth control rolls located below and with their axes parallel to and on opposite sides of the mandrel axis, and a pair of upper growth control rolls arranged above and with their axes parallel and on opposite sides of the mandrel axis, wherein the spacing between the pair of upper growth control rolls is different from the spacing between the pair of lower growth control rolls; and rolling the ring between the forming rolls with the growth control rings engaging the ring.
2. A method according to Claim 1 wherein the spacing between the pair of upper growth control rolls is less than the spacing between the pair of lower growth control rolls.
3. A method according to Claim 1 or Claim 2, wherein the lower growth control rolls are located relative to the mandrel axis with their axes disposed at an angle in the range 500 to 700 below the horizontal plane containing the mandrel axis.
4. A method according to Claim 3, when said angle is 600.
5. A method according to any preceding Claim, wherein the upper growth control rolls are located relative to the mandrel axis with their axes disposed at an angle in the range 50 to 80 above the horizontal plane containing the mandrel axis.
6. A method according to Claim 4, wherein said angle is 750*
7. A modification of a method according to Claim 1, wherein the blank engages with only a single upper growth control roll with its axis disposed directly over the mandrel axis. to
8. A method according to preceding Claim, wherein the mandrel axis and the axis of the forming rolls are in the same horizontal plane.
9. A method according to any of Claims 1 to 7, wherein the mandrel axis is disposed below a horizontal plane containing the forming roll axes.
10. A method according to Claim 8, wherein the mandrel axis is disposed at an angle no greater than 100 below the horizontal plane containing the forming roll axis.
11. A method according to Claim 9, wherein the angle is no greater than 5 .
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0516221A GB2430173A (en) | 2005-08-05 | 2005-08-05 | Ring rolling from metal blanks |
AT06765239T ATE444130T1 (en) | 2005-08-05 | 2006-08-04 | RING ROLLERS MADE OF METAL BLANKS |
JP2008524592A JP4833288B2 (en) | 2005-08-05 | 2006-08-04 | Ring rolling from metal blanks |
EP06765239A EP1909991B1 (en) | 2005-08-05 | 2006-08-04 | Ring rolling from metal blanks |
DE602006009522T DE602006009522D1 (en) | 2005-08-05 | 2006-08-04 | RING ROLLERS OF METAL ROLLING |
ES06765239T ES2331855T3 (en) | 2005-08-05 | 2006-08-04 | LAMINATE OF CROWNS FROM PARTS IN TOSCO METALICAS. |
PCT/GB2006/002937 WO2007017655A1 (en) | 2005-08-05 | 2006-08-04 | Ring rolling from metal blanks |
US11/997,935 US20090120152A1 (en) | 2005-08-05 | 2006-08-04 | Ring rolling from metal blanks |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0516221A GB2430173A (en) | 2005-08-05 | 2005-08-05 | Ring rolling from metal blanks |
Publications (2)
Publication Number | Publication Date |
---|---|
GB0516221D0 GB0516221D0 (en) | 2005-09-14 |
GB2430173A true GB2430173A (en) | 2007-03-21 |
Family
ID=34984219
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB0516221A Withdrawn GB2430173A (en) | 2005-08-05 | 2005-08-05 | Ring rolling from metal blanks |
Country Status (8)
Country | Link |
---|---|
US (1) | US20090120152A1 (en) |
EP (1) | EP1909991B1 (en) |
JP (1) | JP4833288B2 (en) |
AT (1) | ATE444130T1 (en) |
DE (1) | DE602006009522D1 (en) |
ES (1) | ES2331855T3 (en) |
GB (1) | GB2430173A (en) |
WO (1) | WO2007017655A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4964207B2 (en) * | 2008-09-05 | 2012-06-27 | 本田技研工業株式会社 | Endless strip metal ring rolling equipment |
CN102615221B (en) * | 2011-12-13 | 2014-08-20 | 天马轴承集团股份有限公司 | Radial and axial rolling forming method for large-sized double-groove ring piece |
DE102014005085A1 (en) * | 2014-04-08 | 2015-10-08 | Sms Meer Gmbh | Multi-roll table-type rolling mill and method of rolling rings in a multi-roll table-type rolling mill |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3992910A (en) * | 1974-07-24 | 1976-11-23 | Formflo Limited | Rolling operations |
GB1475779A (en) * | 1974-07-24 | 1977-06-10 | Formflo Ltd | Rolling operations |
GB1475777A (en) * | 1974-07-24 | 1977-06-10 | Formflo Ltd | Rolling operations |
GB2313334A (en) * | 1996-05-24 | 1997-11-26 | Formflo Ltd | Rolling annular workpieces |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1185716A (en) * | 1966-01-04 | 1970-03-25 | Rotary Profile Anstalt | Improvements in or relating to Rolling Rings |
GB1329251A (en) * | 1969-12-31 | 1973-09-05 | Nat Res Dev | Rolling machines |
SU578146A1 (en) * | 1975-06-24 | 1977-10-30 | Предприятие П/Я Р-6639 | Ring-rolling mill with automatic control of pressure roll actuator |
JPS6130206A (en) * | 1984-07-20 | 1986-02-12 | Koyo Seiatsu Kk | Roll device of annular-metal rolling mill |
JPS62279006A (en) * | 1986-05-29 | 1987-12-03 | Koichi Hamada | Rolling mill for metal endless belt |
JPH032328A (en) * | 1989-05-30 | 1991-01-08 | Koyo Seiko Co Ltd | Manufacture of race for rolling bearing |
JP2000122310A (en) * | 1998-10-14 | 2000-04-28 | Nisshin Unyu Kogyo Kk | Production of mirror surface pipe for photorecertive drum of copying machine or the like |
-
2005
- 2005-08-05 GB GB0516221A patent/GB2430173A/en not_active Withdrawn
-
2006
- 2006-08-04 US US11/997,935 patent/US20090120152A1/en not_active Abandoned
- 2006-08-04 JP JP2008524592A patent/JP4833288B2/en not_active Expired - Fee Related
- 2006-08-04 DE DE602006009522T patent/DE602006009522D1/en active Active
- 2006-08-04 AT AT06765239T patent/ATE444130T1/en active
- 2006-08-04 EP EP06765239A patent/EP1909991B1/en active Active
- 2006-08-04 ES ES06765239T patent/ES2331855T3/en active Active
- 2006-08-04 WO PCT/GB2006/002937 patent/WO2007017655A1/en active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3992910A (en) * | 1974-07-24 | 1976-11-23 | Formflo Limited | Rolling operations |
GB1475779A (en) * | 1974-07-24 | 1977-06-10 | Formflo Ltd | Rolling operations |
GB1475777A (en) * | 1974-07-24 | 1977-06-10 | Formflo Ltd | Rolling operations |
GB1475778A (en) * | 1974-07-24 | 1977-06-10 | Formflo Ltd | Rolling operations |
GB2313334A (en) * | 1996-05-24 | 1997-11-26 | Formflo Ltd | Rolling annular workpieces |
Also Published As
Publication number | Publication date |
---|---|
DE602006009522D1 (en) | 2009-11-12 |
JP4833288B2 (en) | 2011-12-07 |
JP2009502516A (en) | 2009-01-29 |
US20090120152A1 (en) | 2009-05-14 |
WO2007017655A1 (en) | 2007-02-15 |
EP1909991B1 (en) | 2009-09-30 |
ATE444130T1 (en) | 2009-10-15 |
GB0516221D0 (en) | 2005-09-14 |
EP1909991A1 (en) | 2008-04-16 |
ES2331855T3 (en) | 2010-01-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) |
Free format text: REGISTERED BETWEEN 20100415 AND 20100421 |
|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |