EP2307156A1 - Method of making a ring - Google Patents
Method of making a ringInfo
- Publication number
- EP2307156A1 EP2307156A1 EP09758660A EP09758660A EP2307156A1 EP 2307156 A1 EP2307156 A1 EP 2307156A1 EP 09758660 A EP09758660 A EP 09758660A EP 09758660 A EP09758660 A EP 09758660A EP 2307156 A1 EP2307156 A1 EP 2307156A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blank
- slit
- ring
- tooling
- post
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/76—Making machine elements elements not mentioned in one of the preceding groups
- B21K1/761—Making machine elements elements not mentioned in one of the preceding groups rings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/16—Making other particular articles rings, e.g. barrel hoops
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
- B21J5/022—Open die forging
Definitions
- the invention relates to a method of making a ring, and more particularly, to a method of making a ring by- expanding the middle of a slit blank while simultaneously applying a compressive force to ends of the blank.
- Tubular rings are used for many applications in the industry. Rings can be broached, hobbed, machined, ground, or used as is for many applications. Applications include gears, starter gears, clutch hubs, sprockets, pulleys, crankshaft dampers, and many other products .
- tubular rings There are many existing arts for manufacturing tubular rings. Some common methods include making a hoop from bar stock and welding the joint; making a tube and cutting it; deep drawing a cup and removing the face of the cup; expanding a blank in ring rolling, forging, casting, or spinning a blank from sheet metal.
- Cut seamless tubes are expensive and making a cup in a press and removing the face creates excessive waste.
- the sheared-off outer ring (44) is therefore ejected in the next to last stage, while in the last working stage the inner ring (45) separated from the outer ring is subjected to further working.
- This last working stage involves stamping out a waste piece (35) and shearing-off an annular web (38) . It is also possible to carry out a forming operation in this last working stage to upset the remaining inner ring (22a) .
- the radial annular web (38) can be supported over its full cross- sectional surface during the shearing-off operation. What is needed is a method of making a ring by expanding the middle of a slit blank while simultaneously applying a compressive force to ends of the blank. The present invention meets this need.
- the primary aspect of the invention is to provide a method of making a ring by expanding the middle of a slit blank while simultaneously applying a compressive force to ends of the blank.
- the invention comprises a method of making a ring comprising cutting a raw material stock to a predetermined length, cutting a slit through the raw material stock along its length to form a blank, inserting the blank into a tool, expanding the middle of the slit while simultaneously applying a compressive force to the ends of the blank, and expanding the middle of the slit until the blank is round.
- Fig. 1 is a plan view of a blank.
- Fig. 2 is a side of view of the blank in the tooling.
- Fig. 3 is a side view of the blank in the tooling.
- Fig. 4 is a perspective view of the blank at an intermediate step.
- Fig. 5 is a side view of the blank in the tooling.
- Fig. 6 is a perspective view of the finished ring.
- Fig. 7 is a top perspective view of a blank in the tooling.
- Fig. 8 is a top perspective view of the tooling.
- Fig. 9 is a side perspective view of the tooling.
- the invention comprises a process of manufacturing a tubular ring from bar stock.
- a rectangular bar stock is preferred, any other configuration (round, hexagonal, etc.) may also be used.
- Fig. 1 is a plan view of a blank.
- the process starts with a raw material such as a simple bar stock from which is cut a blank 10 having the desired length (L) and width (W) .
- Raw materials may comprise other than bar stock, including flats, rounds, or any other available form of metal material .
- a rectangular bar stock is used.
- the four corners 11 at the ends of the cut rectangular blank are rounded using known processes to facilitate the process and to give the blank a uniform thickness.
- the blank is cut to form a slit 12 in the middle extending in the longitudinal direction (along its length) .
- the slit can be cut using a laser or other cutting means which include but not limited to: high pressure water jet, laser, plasma, abrasive cutters, milling, or other means.
- a radius 13 At each end of the slit is a radius 13 to prevent crack formation in the expansion process and to keep the thickness uniform.
- the width of the slit is kept to a minimum to reduce waste.
- Fig. 2 is a side of view of the blank in the tooling.
- the blank 10 is then introduced into a press.
- a contoured thickening and rounding post 20 is pressed into the blank at the slit which opens and expands the slit.
- the post initially contacts the slit in the middle.
- End 22 of post 20 comprises a blade which engages the slit 12.
- Post 20 is pressed though blank 10 into a receiving female die 21 using a known hydraulic
- the maximum outside diameter of the post 20 substantially matches the desired inner diameter of the finished ring, see Fig. 6, minus any machining that may be required.
- Fig. 3 is a side view of the blank in the tooling.
- Fig. 4 is a perspective view of the blank at an intermediate step. Slit 12 is shown partially opened. The full diameter of post 20 has not yet engaged the blank 10 and so it is not yet fully rounded. Shoes 23, 24 engage ends 101, 102 of the blank.
- Fig. 5 is a side view of the blank in the tooling.
- the full outside diameter of post 20 is shown fully engaged with the blank 10.
- Blank 10 is therefore fully round.
- Shoes 23, 24 are pressed about blank 10 in order to control the forming and to avoid "squaring" of the blank.
- Fig. 6 is a perspective view of the finished ring.
- the ID of ring 10 substantially matches the OD of the post 20.
- the ring is formed on the post, it is ejected and it is ready to use. If desired and required it is ready for final operations, for example, machining, rolling, spinning, forging, sizing, grinding, etc.
- the formed ring can then sized in an ironing die in a press to obtain a very accurate size and/or a very fine surface finish.
- Yet another version of the method shows that the blank can be expanded to the somewhat square shape and then rounded in a simple rotary forging operation.
- Other embodiments include taking the square blank and spinning it into a round ring, or using a ring rolling process to achieve a round ring.
- the ring can either be formed to a round final shape, or it can be introduced to the press tooling again for a final sizing and rounding operation.
- the need for these additional operations increases as harder material is used, e.g., alloy steels or high carbon steels.
- Harder steels can be formed with the described press tooling, but, they may require larger diameters at the end of the inner slit to prevent cracking. They may also require hot forming (usually 600 to 1100 degrees
- the geometrical aspects of the parent bar stock namely the length, radii around the outer edges, the diameter of the rounded radii at the ends of the slit and the slit thickness are all relevant variables which can be easily selected to optimize accuracy with minimum offal.
- the design of the tooling is also relevant to reduce complexity.
- the tooling can comprise one long post with an expandable lower tooling or a few press stations with gradually expanding lower tooling and gradually thickening and rounding upper tooling.
- the pre-form blank may be made in a "dog bone" shape, where very large diameters at the ends of the slit will allow an easy forming process at the ends of the slit area.
- Fig. 7 is a top perspective view of a blank in the tooling.
- Blank 10 is shown staged in collar 25.
- Collar 25 controls the position of the blank prior to and during the forming process.
- Shoes 23, 24 are each shown withdrawn in order to allow blank 10 to be inserted between.
- Members 27, 26 support the blank between shoes 23, 24.
- Fig. 8 is a top perspective view of the tooling.
- Blank 10 is removed to give a better view of the members 26, 27.
- Members 26, 27 apply a force in a vector direction normal to the compressive force vector of shoes 23, 24 and simultaneously withdraw, or move apart from each other in concert with post 20 as post 20 is pressed through the slit in blank 10. This provides the necessary support for blank 10 as it is formed.
- members 26, 27 support the blank to prevent an axial deformation that is normal to the direction of expansion of the slit. This prevents the blank from deforming in the direction of movement of post 20.
- the movement of post 20 is characterized as movement in an axial direction.
- Fig. 9 is a side perspective view of the tooling.
- Post 20 is shown at the beginning of insertion into slit 12.
- Blade 22 is shown engaged with slit 12.
- Post 20 is pressed into slit 12, thereby expanding the middle of the slit while shoes 23, 24 simultaneously compress the ends of the blank.
- Post 20 is pressed into the blank 10, thereby continuing to expand the middle of the slit until the blank is round.
- Post 20 is then withdrawn and the formed ring is ejected.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Rolling Contact Bearings (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/157,013 US20090301162A1 (en) | 2008-06-06 | 2008-06-06 | Method of making a ring |
PCT/US2009/003059 WO2009148496A1 (en) | 2008-06-06 | 2009-05-15 | Method of making a ring |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2307156A1 true EP2307156A1 (en) | 2011-04-13 |
EP2307156B1 EP2307156B1 (en) | 2011-10-19 |
Family
ID=41022556
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09758660A Not-in-force EP2307156B1 (en) | 2008-06-06 | 2009-05-15 | Method of making a ring |
Country Status (10)
Country | Link |
---|---|
US (1) | US20090301162A1 (en) |
EP (1) | EP2307156B1 (en) |
JP (1) | JP5501348B2 (en) |
KR (1) | KR101216239B1 (en) |
CN (1) | CN102056688B (en) |
AT (1) | ATE529205T1 (en) |
BR (1) | BRPI0913120A2 (en) |
CA (1) | CA2725746C (en) |
RU (1) | RU2468884C2 (en) |
WO (1) | WO2009148496A1 (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009022392B4 (en) * | 2009-05-22 | 2011-09-22 | Federal-Mogul Sealing Systems Gmbh | Method for producing metal stopper elements for flat gaskets |
JP5645536B2 (en) * | 2010-08-09 | 2014-12-24 | ユニプレス株式会社 | Annular disk molding material, annular disk molding method and mold |
CN102513442B (en) * | 2011-11-24 | 2014-02-05 | 贵州安大航空锻造有限责任公司 | Method for forming irregular ring piece by utilizing high-temperature alloy rectangular ring rolled piece through thermal bulging |
CN102513780A (en) * | 2011-12-22 | 2012-06-27 | 西南铝业(集团)有限责任公司 | Forging process of large forged ring |
JP6082263B2 (en) * | 2013-02-13 | 2017-02-15 | 中央発條株式会社 | Manufacturing method of annular member |
JP6179796B2 (en) * | 2013-03-22 | 2017-08-16 | 日立金属株式会社 | Die for hot forging and hot forging method |
DE102014115727B3 (en) * | 2014-10-29 | 2016-04-21 | Hugo Benzing Gmbh & Co. Kg | Method for producing a clamping ring |
RU2624882C2 (en) * | 2015-12-14 | 2017-07-07 | Федеральное государственное унитарное предприятие "Государственный космический научно-производственный центр им. М.В. Хруничева" | Method of manufacturing ring |
CN107138550A (en) * | 2017-03-27 | 2017-09-08 | 刘金财 | Low cost prepares the method that surface scribbles the large-sized aluminium alloy sheet material of wearing layer |
CN108608209A (en) * | 2018-03-30 | 2018-10-02 | 温州市华海密封件有限公司 | The processing method of monoblock type metal ring product |
CN111822649B (en) * | 2020-07-16 | 2021-06-04 | 江阴方圆环锻法兰有限公司 | Forging process of high-precision forge piece |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1839530A (en) * | 1929-03-07 | 1932-01-05 | Victor F Braun | Method and apparatus for forming rings |
US2377857A (en) * | 1942-11-04 | 1945-06-12 | Albert P D Belanger | Method of manufacturing bands |
US2670025A (en) * | 1951-03-14 | 1954-02-23 | Moore Drop Forging Company | Apparatus for spreading split bars to circular forms |
NL6811971A (en) * | 1968-08-22 | 1970-02-24 | ||
JPS5118259A (en) * | 1974-08-06 | 1976-02-13 | Tomio Ishida | Netsukanfuoomaaniokeru naigairindojiseizosochi |
US4590780A (en) * | 1982-10-06 | 1986-05-27 | Hatebur Umformmaschinen Ag | Process and apparatus for producing at least two forgings on a hot-forming press |
SU1152685A1 (en) * | 1983-06-08 | 1985-04-30 | Воронежский Завод Горнообогатительного Оборудования | Method of manufacturing rings from round billets |
JPH0647139B2 (en) * | 1986-03-01 | 1994-06-22 | 株式会社日立製作所 | Ring flange molding method and molding apparatus |
SU1488166A1 (en) * | 1986-11-17 | 1989-06-23 | Kharlov Nikolaj M | Method of producing rings |
US5259819A (en) * | 1991-10-07 | 1993-11-09 | Lee Wen Yuan | Method of manufacturing a washer |
JP2004188548A (en) * | 2002-12-12 | 2004-07-08 | Hino Motors Ltd | Ring-shaped member and method of producing the same |
JP2006175473A (en) * | 2004-12-22 | 2006-07-06 | Kanemitsu:Kk | Method for manufacturing ring-like member |
RU2286862C1 (en) * | 2005-06-01 | 2006-11-10 | Федеральное государственное унитарное предприятие "Московское машиностроительное производственное предприятие "Салют" | Ring making method |
JP4496215B2 (en) * | 2005-10-13 | 2010-07-07 | 株式会社カネミツ | Method for manufacturing ring-shaped member |
US20100083727A1 (en) * | 2007-03-12 | 2010-04-08 | Toshiaki Kanemitsu | Process for manufacturing ring-shaped member |
-
2008
- 2008-06-06 US US12/157,013 patent/US20090301162A1/en not_active Abandoned
-
2009
- 2009-05-15 AT AT09758660T patent/ATE529205T1/en not_active IP Right Cessation
- 2009-05-15 KR KR1020107027607A patent/KR101216239B1/en not_active IP Right Cessation
- 2009-05-15 WO PCT/US2009/003059 patent/WO2009148496A1/en active Application Filing
- 2009-05-15 JP JP2011512448A patent/JP5501348B2/en not_active Expired - Fee Related
- 2009-05-15 RU RU2010154100/02A patent/RU2468884C2/en not_active IP Right Cessation
- 2009-05-15 EP EP09758660A patent/EP2307156B1/en not_active Not-in-force
- 2009-05-15 CA CA2725746A patent/CA2725746C/en not_active Expired - Fee Related
- 2009-05-15 BR BRPI0913120A patent/BRPI0913120A2/en not_active IP Right Cessation
- 2009-05-15 CN CN200980120683.1A patent/CN102056688B/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2009148496A1 * |
Also Published As
Publication number | Publication date |
---|---|
KR101216239B1 (en) | 2012-12-28 |
RU2010154100A (en) | 2012-07-20 |
EP2307156B1 (en) | 2011-10-19 |
WO2009148496A1 (en) | 2009-12-10 |
US20090301162A1 (en) | 2009-12-10 |
KR20110005310A (en) | 2011-01-17 |
JP2011521791A (en) | 2011-07-28 |
RU2468884C2 (en) | 2012-12-10 |
JP5501348B2 (en) | 2014-05-21 |
ATE529205T1 (en) | 2011-11-15 |
BRPI0913120A2 (en) | 2016-01-05 |
CN102056688B (en) | 2013-03-27 |
CA2725746A1 (en) | 2009-12-10 |
CA2725746C (en) | 2013-07-02 |
CN102056688A (en) | 2011-05-11 |
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