GB1389626A - Apparatus for manufacturing leaf springs having tapered end portions - Google Patents

Apparatus for manufacturing leaf springs having tapered end portions

Info

Publication number
GB1389626A
GB1389626A GB3410573A GB3410573A GB1389626A GB 1389626 A GB1389626 A GB 1389626A GB 3410573 A GB3410573 A GB 3410573A GB 3410573 A GB3410573 A GB 3410573A GB 1389626 A GB1389626 A GB 1389626A
Authority
GB
United Kingdom
Prior art keywords
band
fed
spring
springs
thickness
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
Application number
GB3410573A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NHK Spring Co Ltd
Original Assignee
NHK Spring Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from JP47072876A external-priority patent/JPS5214822B2/ja
Priority claimed from JP7881373A external-priority patent/JPS5311959B2/ja
Application filed by NHK Spring Co Ltd filed Critical NHK Spring Co Ltd
Publication of GB1389626A publication Critical patent/GB1389626A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions
    • B21B37/24—Automatic variation of thickness according to a predetermined programme
    • 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
    • B21H7/00—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons
    • B21H7/007—Taper rolling, e.g. leaf springs
    • 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
    • B21H8/00—Rolling metal of indefinite length in repetitive shapes specially designed for the manufacture of particular objects, e.g. checkered sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/40—Constructional features of dampers and/or springs
    • B60G2206/42—Springs
    • B60G2206/428—Leaf springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/80—Manufacturing procedures
    • B60G2206/81—Shaping
    • B60G2206/8109—Shaping by rolling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49609—Spring making
    • Y10T29/49611—Spring making for vehicle or clutch

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Agronomy & Crop Science (AREA)
  • Springs (AREA)
  • Metal Rolling (AREA)
  • Wire Processing (AREA)

Abstract

1389626 Making leaf springs; rolling NHK SPRING CO Ltd 17 July 1973 [20 July 1972 12 July 1973] 34105/73 Headings B3A and B3M [Also in Divisions F2 and G3] An apparatus for making leaf springs with tapered end portions comprises a furnace 21 through which a metal band is fed to a rolling mill 22 whose roll separation is variable to form reduced thickness portions in the band, the band then being fed to shears 27 to cut the band into individual springs. The individual springs are then reheated in a furnace and fed to a/or one of a pair of punch and die sets 31, 32 for hole punching. The band and springs are fed through the apparatus on a roller table 20. The furnace 21 heats the band to 900‹ C. The rolling mill 22 has working rolls 23, 24 and pinch rolls 25, 26. The separation of the working rolls 23, 24 is effected by a screw down mechanism 44, Fig. 6, controlled by a pulse motor 43 fed with signals from a logic circuit 42. The logic circuit stores information of desired taper lengths (l 1 ), (l 2 ), Fig. 7 (not shown), spring length (L), spring thickness (T) and front end thickness (t 1 ). These features of each spring are measured by the pinch rollers 25, 26 connected to pulse generators 40, 41a, 41b. whose signals are fed to the logic circuit 42. The measured valves are processed in dependence on the desired values and the output signal is applied to the pulse motor 43. The rolls 25 and one roll 26 serve to measure the length passed between them while the other roll 26 measures the thickness of the band. The ends of the leaf spring produced may have linear or curved tapers on one or both faces, Figs. 9A-D, 10A-D (not shown). The tapers may be symmetrical or assymetrical.
GB3410573A 1972-07-20 1973-07-17 Apparatus for manufacturing leaf springs having tapered end portions Expired GB1389626A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP47072876A JPS5214822B2 (en) 1972-07-20 1972-07-20
JP7881373A JPS5311959B2 (en) 1973-07-12 1973-07-12

Publications (1)

Publication Number Publication Date
GB1389626A true GB1389626A (en) 1975-04-03

Family

ID=26414012

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3410573A Expired GB1389626A (en) 1972-07-20 1973-07-17 Apparatus for manufacturing leaf springs having tapered end portions

Country Status (5)

Country Link
US (1) US3820373A (en)
DE (1) DE2336459A1 (en)
FR (1) FR2193680B1 (en)
GB (1) GB1389626A (en)
IT (1) IT994104B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU674566B2 (en) * 1993-02-11 1997-01-02 Trico Products Corporation Manufacture of metallic strip
US5875672A (en) * 1993-02-11 1999-03-02 Fourie; Eugene Method and apparatus for manufacturing metallic support beams for windscreen wiper blade assemblies

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4283930A (en) * 1977-12-28 1981-08-18 Aichi Steel Works Limited Roller-dies-processing method and apparatus
US4248072A (en) * 1978-07-25 1981-02-03 Aichi Steel Works, Limited Method of and apparatus for producing plate material having uniform width and lengthwise thickness variation
AU512528B1 (en) * 1979-06-15 1980-10-16 Nhk Spring Co. Ltd. Taper spring manufacture
WO1989000899A1 (en) * 1987-08-04 1989-02-09 Belorussky Politekhnichesky Institut Method and device for making workpieces with a variable longitudinal profile
DE3890584T1 (en) * 1987-08-04 1989-12-21 Bruss Polt I METHOD FOR THE PRODUCTION OF SEMI-FINISHED PRODUCTS HAVING A VARIABLE PROFILE AND DEVICE FOR IMPLEMENTING THE SAME
US5001918A (en) * 1987-11-04 1991-03-26 Stepanenko Alexandr V Method and apparatus for making blanks of a profile varying lengthwise
DE19704300B4 (en) * 1997-02-06 2008-07-10 Benteler Ag Method for producing boards with different thicknesses
US6532638B2 (en) * 1998-04-15 2003-03-18 Robert Bosch Gmbh Method of making flat blade windshield wipers for a motor vehicle with curved flat blade
DE19846900C2 (en) 1998-10-12 2000-08-10 Thyssenkrupp Stahl Ag Method and device for producing a metal strip for tailored blanks
DE10041280C2 (en) * 2000-08-22 2003-03-06 Muhr & Bender Kg Method and device for flexible rolling of a metal strip
AU2002951062A0 (en) * 2002-08-29 2002-09-12 Nukorc Pty Ltd An improved synthetic closure and a method of forming thereof
DE10246164B4 (en) * 2002-10-02 2014-03-20 Benteler Automobiltechnik Gmbh Method for producing structural components
CN102218662B (en) * 2011-06-13 2012-09-26 浙江恒立数控科技股份有限公司 Production line for cutting metal thin plate
CN103056600A (en) * 2011-10-22 2013-04-24 东风钟祥汽车弹簧有限公司 Multi-process machining method for variable-cross-section plate spring and using rolling waste heat
US9573432B2 (en) 2013-10-01 2017-02-21 Hendrickson Usa, L.L.C. Leaf spring and method of manufacture thereof having sections with different levels of through hardness
CN106678218A (en) * 2016-07-15 2017-05-17 安庆安簧汽车零部件有限公司 One-piece steel plate spring and manufacturing technology thereof
CN107470916A (en) * 2017-08-03 2017-12-15 常州常发制冷科技有限公司 Steel plate transverse shearing production line and apply its horizontal shearing process of steel plate
CN108746353B (en) * 2018-05-18 2020-04-28 山东汽车弹簧厂淄博有限公司 Reed end shaping system and method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU674566B2 (en) * 1993-02-11 1997-01-02 Trico Products Corporation Manufacture of metallic strip
US5875672A (en) * 1993-02-11 1999-03-02 Fourie; Eugene Method and apparatus for manufacturing metallic support beams for windscreen wiper blade assemblies

Also Published As

Publication number Publication date
US3820373A (en) 1974-06-28
FR2193680A1 (en) 1974-02-22
DE2336459A1 (en) 1974-01-31
FR2193680B1 (en) 1977-05-13
IT994104B (en) 1975-10-20

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years

Effective date: 19930716