US3633398A - Making corrugated elastic shims - Google Patents
Making corrugated elastic shims Download PDFInfo
- Publication number
- US3633398A US3633398A US4691A US3633398DA US3633398A US 3633398 A US3633398 A US 3633398A US 4691 A US4691 A US 4691A US 3633398D A US3633398D A US 3633398DA US 3633398 A US3633398 A US 3633398A
- Authority
- US
- United States
- Prior art keywords
- strip
- bending chamber
- bending
- anvil
- corrugated
- 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.)
- Expired - Lifetime
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Classifications
-
- 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
-
- 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
- F16D1/0829—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 loading of both hub and shaft by an intermediate ring or sleeve
- F16D1/0835—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 loading of both hub and shaft by an intermediate ring or sleeve due to the elasticity of the ring or sleeve
Definitions
- the stock is sheared generally radially by a shear blade acting against the corner of the semicylindrical anvil.
- Completed corrugated elastic shims are ejected axially.
- the strip is gripped or engaged only at the edges.
- the present invention relates to to the making of corrugated elastic shims from corrugated strip by bending them into generally curved, circular or multisided shape.
- Corrugated elastic shims as explained in Dix and Wehr U.S. Pat. No. 3,06l ,386, granted Oct. 30, 1962 for Tolerance Rings and Hulck and Schultes U.S. Pat. No. 3,142,887, granted Aug. 4, I964 for Method of Making a Split Annular Tolerance Ring, are intended for securing rotating parts such as bearings, pulleys, sheaves, gears, sprockets, levers and the like, to shafts. As shown in Roller Bearing Co.
- corrugated elastic shims are of two types, one intended for insertion first into a hole, into which the shaft is later pressed (type AN) and the other intended first for insertion around a shaft (in many cases within a circumferential recess around the shaft), and then the shaft and corrugated elastic shim to be pressed into the interior opening of a rotating part surrounding the same (type BN).
- corrugated elastic shims have been to roll corrugated strip between a rigid circular mandrel and an elastic wheel. This method has been subject to difficulty because of variation in the elasticity of the elastic wheel, rapid wear of the elastic wheel, and difi'rculty in maintaining adjustment which will produce corrugated elastic shims of precise dimensions without necessity for resizing or rejecting a substantial number which were not according to size.
- One difficulty has been that there is a tendency if excessive pressure is applied to deform the corrugations so that the corrugated elastic shims no longer grip properly.
- Another method of making corrugated elastic shims in the past has been to feed strip tangentially against an idling wheel which is capable of rotating and which forms part of the circumference of a cylindrical bending chamber containing a semicylindrical anvil and a cooperating shear blade.
- This method has also given rise to difficulties through need for constant readjustment of the idling wheel, and danger of producing corrugated elastic shims which will no longer conform to the required gage dimensions.
- One purpose of the present invention is to eliminate the difficulties due to wear in the idling wheel and avoid the need for constant readjustment.
- a further purpose of the invention is to obtain corrugated elastic shims which are not subject to deformation of the corrugations which has made it necessary to resize after bending.
- a further purpose is to simplify the operation of bending corrugated elastic shims.
- FIG. 1 is a perspective of a corrugated elastic shim produced according to the invention.
- FIG. 2 is an axial section showing a corrugated elastic shim installed to hold a pulley on a shaft.
- FIGS. 3 to 6 are stepwise end elevations of the bending mechanism, the illustrations being diagrammatic.
- FIG. 3 is an end elevation of the start of the bending operation with the strip entering the inlet to the bending chamber.
- FlG.-4 illustrates the further advance of the strip into the bending chamber, and shows the position at which a new cycle will start.
- FIG. 5 is slightly enlarged and shows the feed fully advanced to place one and a half turns of corrugated strip in the bending chamber.
- FIG. 6 is slightly enlarged and illustrates the shearing operation.
- FIG. 7 is a section on the line 7-7 of FIG. 6 showing the ejection, and omitting the remaining strip.
- FIG. 8 is a transverse section through the gripping jaws of FIG. 3, designed for use on corrugated elastic shims of RN type.
- FIG. 9 is a transverse section through the gripping jaws of FIG. 3 intended for use on corrugated elastic shims of AN type.
- FIG. 10 is a fragmentary enlarged section of FIG. 5 on the line 10-10, showing the bending block and shear blade designed for bending BN-type corrugated elastic shims.
- FIG. 11 is a fragmentary enlarged section of FIG. 5 on the line I0-10, showing the bending block and semicylindrical anvil for bending AN-type corrugated elastic shims.
- metallic strip 20 in FIG. 3 is taken off a reel 21 and passes through corrugating rolls 22 and 23 suitably intergeared (not shown) to form corrugations extending transversely along the length of the strip through the middle portion, not extending fully to the edges in the preferred embodiment.
- the corrugated strip 24 thus produced is fed by feed mechanism 25, which as suggested by FIG. 3, involves an upper feed jaw 26 and a lower feed jaw 27.
- the jaws are capable as indicated by the arrows of gripping the corrugated strip so as not to crush the corrugations, feeding the strip forward for one increment which corresponds to the material required to make one corrugated elastic shim, then releasing the grip and retracting backward. On the next cycle the jaws grip again and advance as previously explained.
- the corrugated elastic strip In order to permit gripping the corrugated elastic strip, it is corrugated over only part of its width, suitably at the middle.
- the upper feed jaw, 26 is relieved at 26 to avoid crushing BN-type corrugations 24 (FIG. 8) or the lower feed jaw 27 is relieved at 27' to avoid crushing AN-type corrugations 24 (FIG. 9). In either case the feed jaws 26 and 27 engage one or both edges 24 of the corrugated strip as shown.
- the strip advances to a bending block 28 which has a curved or preferably cylindrical bending chamber 30 disposed with its axis at right angles to the direction of progression of the strip.
- Strip enters the bending chamber through a tangential inlet opening 31' and impinges against the wholly stationery preferably cylindrical interior wall.
- the forward end of the strip encounters the inside of an outer turn of strip at 34 and continues along the inside of the strip until it abuts against the straight generally radial surface of the suitably semicylindrical anvil at 36. Because of the need to use the portion 36 of the semicylindrical anvil as a stop, the clearance between the semicylindrical anvil and the inside of the bending chamber at this point is limited to allow only one layer of corrugated strip to enter this space. At the opposite end of the semicylindrical anvil at 37, there is room provided for two turns of corrugated strip between the inner wall of the cylindrical bending chamber 30 and the semicylindrical anvil. Therefore, as shown in FIG. 5, the anvil is placed slightly ofi'center in the preferably cylindrical bending chamber to allow for this difference in clearance.
- a shear blade 38 is capable of moving between a radially outer position not in contact with the strip and a radially inner position at which it has encountered the outermost layer of corrugated strip and sheared it off at 40.
- ejector pins 41 are brought in parallel to the axis in suitable openings by a follower 43 to engage the formed corrugated elastic shim 44 and push it out of the bending chamber 30 while retaining in the bending chamber one-half turn of corrugated strip which will be there at the time of the next cycle.
- the follower 43 is advanced by a suitable rotating cam 45 and the follower 43 is biased by spring means not shown to follow the cam.
- the bending chamber and the anvil engage the corrugated elastic strip at its edges.
- the wall of the bending chamber 30 has an annular recess 30' intermediate its ends, which receives the corrugations 24 of BN-type corrugated elastic shims 24.
- the semicylindrical anvil 31 has a recess 31 for corrugations 24 in the midlength area on the side adjoining shear blade 38.
- the edge portions 24 of the corrugated elastic shim engage the wall of the bending chamber 30 in both BN and AN types as shown in FIGS. and 11.
- the material of the strip may be carbon steel such as AI SI 1070 or 1074, hardened by heat treatment usually after bending, or stainless steel type 301, which is cold worked usually before bending.
- compositions of which corrugated elastic shims can be made are beryllium copper (subsequently heat treated), phosphor bronze cold worked to spring properties, or Monel cold worked to spring properties and containing:
- the corrugated elastic shims are not rolled in bending and therefore are not likely to have their corrugations crushed or distorted. Resizing, therefore, is not necessary.
- the equipment is not likely to get out of adjustment, and therefore it is possible to operate for long periods without adjustment.
- FIG. 1 I there illustrate a generally circular corrugated elastic shim 50 having corrugations 51 extending transversely of its length and a rim 52 at each side which is free from corrugations.
- FIG. 2 I show a pulley 53 which has a hole 54 in the interior and is fastened to a shaft 56 by a corrugated elastic shim 50 in an annular recess 55.
- Mechanism of claim I having feeding means which introduces one and one half turns of strip into the bending chamber.
- a method of bending corrugated strip in a cylindrical bending chamber free from rotating parts having an anvil with clearance from the walls of the bending chamber which comprises feeding corrugated strip tangentially into the bending chamber and between the anvil and the bending chamber wall until one end of the strip abuts against the anvil, bending the strip into a curved shape, shearing the strip generally radially against the anvil and removing the strip axially from the bending chamber.
- a method of claim 5, which comprises feeding one and one half turns of corrugated strip into the bending chamber before shearing, removing one turn of the sheared strip by ejecting axially and retaining one half turn of strip in the bending chamber to form the next tolerance ring.
Abstract
Description
Claims (7)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US469170A | 1970-01-21 | 1970-01-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3633398A true US3633398A (en) | 1972-01-11 |
Family
ID=21712041
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US4691A Expired - Lifetime US3633398A (en) | 1970-01-21 | 1970-01-21 | Making corrugated elastic shims |
Country Status (1)
Country | Link |
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US (1) | US3633398A (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5315465A (en) * | 1991-07-12 | 1994-05-24 | Seagate Technology, Inc. | Compliant pivot mechanism for a rotary actuator |
US6480363B1 (en) | 2000-05-22 | 2002-11-12 | International Business Machines Corporation | Hard disk drive actuator assembly with damped tolerance ring for enhancing drive performance during structural resonance modes |
US6594896B2 (en) * | 2001-03-12 | 2003-07-22 | Denso Corporation | Method for making corrugated fins |
US6603634B1 (en) | 1998-06-05 | 2003-08-05 | Seagate Technology Llc | Compressive spring sleeve for reducing disc slippage |
WO2004094852A1 (en) * | 2003-04-17 | 2004-11-04 | Rencol Tolerance Rings Limited | Tolerance ring assembly |
US20080028591A1 (en) * | 2006-08-07 | 2008-02-07 | Rencol Tolerance Rings Limited | Assembly of a shaft and a housing assembly |
WO2010097574A1 (en) * | 2009-02-26 | 2010-09-02 | John Crane Uk Limited | Tolerance strips |
US20110049834A1 (en) * | 2009-08-28 | 2011-03-03 | Saint-Gobain Performance Plastics Pampus Gmbh | Corrosion resistant bushing |
US20110076096A1 (en) * | 2009-09-25 | 2011-03-31 | Saint-Gobain Performance Plastics Rencol Limited | System, method and apparatus for tolerance ring control of slip interface sliding forces |
US20130105267A1 (en) * | 2010-09-03 | 2013-05-02 | Togo Seisakusyo Corporation | Tolerance ring for torque transmission device |
CN110060710A (en) * | 2007-04-24 | 2019-07-26 | 圣戈班高功能塑料兰科有限公司 | Mounting assembly |
US11005334B2 (en) | 2017-12-15 | 2021-05-11 | Saint-Gobain Performance Plastics Rencol Limited | Annular member, method, and assembly for component displacement control |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1675300A (en) * | 1924-10-06 | 1928-06-26 | Elma N Dawson | Apparatus for making binder rings |
US2855974A (en) * | 1957-01-28 | 1958-10-14 | Heckethorn Mfg & Supply Compan | Automatic declutching and cut-off control devices for spring winding machines |
-
1970
- 1970-01-21 US US4691A patent/US3633398A/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1675300A (en) * | 1924-10-06 | 1928-06-26 | Elma N Dawson | Apparatus for making binder rings |
US2855974A (en) * | 1957-01-28 | 1958-10-14 | Heckethorn Mfg & Supply Compan | Automatic declutching and cut-off control devices for spring winding machines |
Cited By (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5315465A (en) * | 1991-07-12 | 1994-05-24 | Seagate Technology, Inc. | Compliant pivot mechanism for a rotary actuator |
US6603634B1 (en) | 1998-06-05 | 2003-08-05 | Seagate Technology Llc | Compressive spring sleeve for reducing disc slippage |
US6480363B1 (en) | 2000-05-22 | 2002-11-12 | International Business Machines Corporation | Hard disk drive actuator assembly with damped tolerance ring for enhancing drive performance during structural resonance modes |
US6594896B2 (en) * | 2001-03-12 | 2003-07-22 | Denso Corporation | Method for making corrugated fins |
US8228640B2 (en) | 2003-04-17 | 2012-07-24 | Saint-Gobain Performance Plastics Rencol Limited | Tolerance ring assembly for supporting a disk drive actuator bearing |
WO2004094852A1 (en) * | 2003-04-17 | 2004-11-04 | Rencol Tolerance Rings Limited | Tolerance ring assembly |
US20060228174A1 (en) * | 2003-04-17 | 2006-10-12 | Rencol Tolerance Rings Limited | Tolerance ring assembly |
US10203004B2 (en) | 2003-04-17 | 2019-02-12 | Saint-Gobain Performance Plastics Rencol Limited | Method of using a tolerance ring |
US20100321832A1 (en) * | 2003-04-17 | 2010-12-23 | Saint-Gobain Performance Plastics Rencol Limited | Tolerance ring assembly |
US20100321833A1 (en) * | 2003-04-17 | 2010-12-23 | Saint-Gobain Performance Plastics Rencol Limited | Tolerance ring assembly |
US9206853B2 (en) | 2003-04-17 | 2015-12-08 | Saint-Gobain Performance Plastics Rencol Limited | Tolerance ring assembly |
US9206854B2 (en) | 2003-04-17 | 2015-12-08 | Saint-Gobain Performance Plastics Rencol Limited | Tolerance ring assembly |
US9004802B2 (en) | 2003-04-17 | 2015-04-14 | Saint-Gobain Performance Plastics Rencol Limited | Tolerance ring assembly |
US20080028591A1 (en) * | 2006-08-07 | 2008-02-07 | Rencol Tolerance Rings Limited | Assembly of a shaft and a housing assembly |
US8424184B2 (en) | 2006-08-07 | 2013-04-23 | Saint-Gobain Performance Plastics Rencol Limited | Assembly of a shaft and a housing assembly |
US7958637B2 (en) | 2006-08-07 | 2011-06-14 | Saint-Gobain Performance Plastics Rencol Limited | Assembly of a shaft and a housing assembly |
CN110060710B (en) * | 2007-04-24 | 2020-10-02 | 圣戈班高功能塑料兰科有限公司 | Mounting assembly |
CN110060710A (en) * | 2007-04-24 | 2019-07-26 | 圣戈班高功能塑料兰科有限公司 | Mounting assembly |
WO2010097574A1 (en) * | 2009-02-26 | 2010-09-02 | John Crane Uk Limited | Tolerance strips |
US8715835B2 (en) | 2009-02-26 | 2014-05-06 | John Crane Uk Limited | Tolerance strips |
US8944690B2 (en) | 2009-08-28 | 2015-02-03 | Saint-Gobain Performance Plastics Pampus Gmbh | Corrosion resistant bushing |
US20110049834A1 (en) * | 2009-08-28 | 2011-03-03 | Saint-Gobain Performance Plastics Pampus Gmbh | Corrosion resistant bushing |
US20110076096A1 (en) * | 2009-09-25 | 2011-03-31 | Saint-Gobain Performance Plastics Rencol Limited | System, method and apparatus for tolerance ring control of slip interface sliding forces |
US10371213B2 (en) | 2009-09-25 | 2019-08-06 | Saint-Gobain Performance Plastics Rencol Limited | System, method and apparatus for tolerance ring control of slip interface sliding forces |
US9145925B2 (en) * | 2010-09-03 | 2015-09-29 | Togo Seisakusyo Corrporation | Tolerance ring for torque transmission device |
US20130105267A1 (en) * | 2010-09-03 | 2013-05-02 | Togo Seisakusyo Corporation | Tolerance ring for torque transmission device |
US11005334B2 (en) | 2017-12-15 | 2021-05-11 | Saint-Gobain Performance Plastics Rencol Limited | Annular member, method, and assembly for component displacement control |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: CREDIT SUISSE FIRST BOSTON, NEW YORK Free format text: SECURITY INTEREST;ASSIGNOR:ROLLER BEARING COMPANY OF AMERICA, INC.;REEL/FRAME:009089/0689 Effective date: 19970623 |
|
AS | Assignment |
Owner name: GENERAL ELECTRIC CAPITAL CORPORATION, CONNECTICUT Free format text: SECURITY AGREEMENT;ASSIGNOR:ROLLER BEARNING COMPANY OF AMERICA, INC.;REEL/FRAME:012928/0536 Effective date: 20020530 |
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AS | Assignment |
Owner name: CREDIT SUISSE FIRST BOSTON, NEW YORK Free format text: RELEASE;ASSIGNOR:ROLLER BEARING COMPANY OF AMERICA, INC.;REEL/FRAME:013240/0585 Effective date: 20020827 |
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AS | Assignment |
Owner name: GENERAL ELECTRIC CAPITAL CORPORATION, AS AGENT, CO Free format text: PATENT SECURITY AGREEMENT;ASSIGNOR:ROLLER BEARING COMPANY OF AMERICA, INC.;REEL/FRAME:014836/0672 Effective date: 20040629 |
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AS | Assignment |
Owner name: MADELEINE L.L.C. AS SCIL AGENT, NEW YORK Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ROLLER BEARING COMPANY OF AMERICA, INC.;GENERAL ELECTRIC CAPITAL CORPORATION, AS SCIL AGENT;REEL/FRAME:015748/0827 Effective date: 20040823 |
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AS | Assignment |
Owner name: ROLLER BEARING COMPANY OF AMERICA, INC., CONNECTIC Free format text: RELEASE OF SECURITY INTEREST;ASSIGNOR:MADELEINE L.L.C.;REEL/FRAME:016460/0909 Effective date: 20050815 |