EP1440744A1 - Procédé de fabrication d'une jante comprenant des anneaux de rive creux - Google Patents

Procédé de fabrication d'une jante comprenant des anneaux de rive creux Download PDF

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Publication number
EP1440744A1
EP1440744A1 EP03018771A EP03018771A EP1440744A1 EP 1440744 A1 EP1440744 A1 EP 1440744A1 EP 03018771 A EP03018771 A EP 03018771A EP 03018771 A EP03018771 A EP 03018771A EP 1440744 A1 EP1440744 A1 EP 1440744A1
Authority
EP
European Patent Office
Prior art keywords
ring
opposite
rim
making
annular
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Withdrawn
Application number
EP03018771A
Other languages
German (de)
English (en)
Inventor
Junichi Sato
Katsuhiro Motode
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.)
Daido Kogyo Co Ltd
Original Assignee
Daido Kogyo 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
Application filed by Daido Kogyo Co Ltd filed Critical Daido Kogyo Co Ltd
Publication of EP1440744A1 publication Critical patent/EP1440744A1/fr
Withdrawn legal-status Critical Current

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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
    • B21D53/26—Making other particular articles wheels or the like
    • B21D53/30—Making other particular articles wheels or the like wheel rims
    • 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
    • Y10T29/49481—Wheel making
    • Y10T29/49492—Land wheel
    • Y10T29/49524—Rim making
    • Y10T29/49531—Roller forming

Definitions

  • the present invention relates to a method of making a rim having opposite hollow flanges formed on its circumference.
  • rims for motorcycles are of aluminum, but steel rims are still used widely.
  • a variety of steel rims used are different in cross sections.
  • One of the principal steel rims is called "W"-type rim. It has two opposite hollow flanges "a” formed on its annular circumference, as shown in Fig.5(a). The tyre bead is fitted on the hollow flanges "a" of the rim.
  • DC type rim Another principal steel rim is called DC type rim. It has opposite projecting flanges "b" rising from the outer edges of the annular circumference, as shown in Fig.5(b). This flange "b" of the DC type rim has a reduced strength, compared with the hollow flanges "a” of the "W"-type rim. Also, the strength and rigidity of the whole rim body is low, compared with the "W"-type rim.
  • Advantageously DC type rims can be made by a multi-stage roll system.
  • Small-sized "W- type rims cannot be made by such a multi-stage roll system; their hollow flanges cannot be correctly shaped.
  • a strip of steel needs to be partly worked by a series of rolls sequentially (15 to 20 steps) until it has been given a required shape in cross-section.
  • the semi-final shaped object is curved to be given a required curvature, and then the ring is cut.
  • the cut ends are flash butt-welded to provide an annular rim.
  • the annular rim is corrected in roundness, followed by five to six steps including removing the burr or flash from the welded cut. Then, the whole rim body is polished, and nipple bosses and holes are formed in the polished rim to stretch the spokes across the ring. Finally the rim is subjected to the surface treatment.
  • a strip of steel needs to be subjected to the 15 to 20 forming steps to be given the cross-section as shown in Fig.5(a).
  • the so-shaped strip of steel has a hollow flange "a" formed on its annular circumference. If the flange is relatively large in width, and if the final annular product is relatively small in size, the shaped steel strip cannot be rolled into the rim without twisting and deforming its hollow flange.
  • burr-removing-and-polishing of the welded cut ends of the rim cannot be automatized. This step must be performed manually, and therefore, the manufacturing cost increases, and the product quality cannot be guaranteed to be same.
  • One object of the present invention is to provide a method of, with precision and efficiency, making a small-sized rim having a hollow flange formed on its annular circumference.
  • the method can be equally used in making such rims of steel and aluminum.
  • a method of making a rim having hollow flanges formed on its opposite annular edges according to the present invention comprises the steps of:
  • the opposite ends of the rolled steel strip can be welded easily for instance by flash butt-welding; the required welding is linear along the abutting line, and can be automatized. Friction welding can be used, also.
  • Each annular edge of the ring can be curled diametrically outward by pushing the ring on the opposite sides with conical tools.
  • One to four roll-forming steps follow, much smaller in number than the conventional method.
  • the method according to the present invention can be used in making small-sized rims of relatively large width. Needless to say, it can be used in making large-sized rims of relatively small width.
  • a coiled band steel 1 having a fixed width "M” and thickness "T” is prepared.
  • coiled band aluminum is prepared.
  • the band steel 1 is cut to provide steel strips of a predetermined length "L", which is equal to the circumference of the rim to be made.
  • a selected steel strip of the predetermined length is bent into a ring with a bender. As shown, the ring has an aperture 2 between the opposite cut ends.
  • the open ring is closed, and the abutting ends 3a and 3b are flash butt-welded.
  • the burr or flash is removed from the welded portion 4 to be flush with the inner, outer circumferences 5 and 6, and with the opposite sides 7. For instance, the burr or flash is removed by shaper tools while around the welded portion 4 is clamped.
  • each annular edge of the ring 8 is curled by inserting a conical tool into the ring 8 on each open side, forming the curl 12 on each open side. Then, the edge-curled ring 9 is shaped by a series of rolls, as shown in Fig.3.
  • edge-curled ring 9 is roll-formed to define a well 10 at its center (see Fig.3(a)) as follows: the main annular part of the edge-curled ring 9 is sandwiched between the inner and outer rolls, and the edge-curled ring 9 is rotated to form the well 10 on its main annular part.
  • the so shaped ring 9 is roll-formed to bend the opposite bead areas 11 toward the center well 10 (see Fig.3(b)).
  • the ring 9 is roll-formed to make the free edge of each curl closer to the bead area 11, thus substantially reducing the gap 13 between the bead area 11 and the curl edge (see Fig.3(c)).
  • Each flange 15 has a hollow space 14.
  • the step of bending the opposite bead areas 11 toward the center well 10 (Fig.3(b)) is preliminary for defining the hollow flanges 15. After finishing the roll forming of the flanges 15, the bead areas 11 are unbent to their original flat shapes (Fig.3(e)).
  • the ring 8 is not directly provided with the hollow flanges, which can be formed via the preparatory step of curling the opposite annular edges.
  • the steps (a) and (c) encircled with broken lines in Fig.3 can be omitted.
  • Fig.4 shows another manner in which a rim having hollow flanges formed on its opposite annular edges can be made according to the present invention.
  • edge-curled ring 9 is roll-formed to define a well 10 in the center of the main annular part (see Fig.(a)).
  • the so shaped ring 9 is roll-formed to define the opposite hollow flanges 16 (see Fig.4(b)). As seen from the drawing, the opposite hollow flanges 16 are inclined outward to be apart from the opposite bead areas 11, which border the center well 10.
  • Nipple bosses and holes are formed on the rim thus provided to stretch wire spokes to form a wheel with use of the rim. Otherwise, plate spokes are welded to the inner circumference of the rim.
  • Rims made according to the present invention can be used for the wheels of motorcycles and other cars such as buggies.
  • the pre-edge-curling of the rolled steel strip permits opposite hollow flanges to be formed with precision no matter how wide the rim may be, and no matter how small the rim diameter may be. Also advantageously the number of steps required for forming rims is significantly smaller than the conventional method, and accordingly the manufacturing cost can be reduced. Removal of the burr or flash from the linear welded part of the ring is easy.
EP03018771A 2003-01-27 2003-08-27 Procédé de fabrication d'une jante comprenant des anneaux de rive creux Withdrawn EP1440744A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003017272A JP2004224292A (ja) 2003-01-27 2003-01-27 中空フランジ部を有すリムの製造方法
JP2003017272 2003-01-27

Publications (1)

Publication Number Publication Date
EP1440744A1 true EP1440744A1 (fr) 2004-07-28

Family

ID=32588706

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03018771A Withdrawn EP1440744A1 (fr) 2003-01-27 2003-08-27 Procédé de fabrication d'une jante comprenant des anneaux de rive creux

Country Status (4)

Country Link
US (1) US20040143968A1 (fr)
EP (1) EP1440744A1 (fr)
JP (1) JP2004224292A (fr)
CN (1) CN1517239A (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1714797B1 (fr) * 2004-01-20 2013-03-13 Washi Kosan Co., Ltd. Procede de production d'une roue en alliage leger pour vehicule et roue
JP5463162B2 (ja) * 2010-02-24 2014-04-09 中央精機株式会社 車両用ホイールの製造方法
KR20130140597A (ko) 2010-07-02 2013-12-24 아크티에볼라게트 에스케이에프 베어링 링 및 이의 제조 방법
CN102107320A (zh) * 2010-12-30 2011-06-29 首钢总公司 重型汽车钢质轮辋的脉冲通电预热闪光焊接工艺
EP2794174A4 (fr) * 2011-12-20 2016-01-20 Skf Ab Procédé de production d'un élément en acier par soudage en bout par étincelage, et un élément obtenu selon ce procédé
KR20140107289A (ko) * 2011-12-20 2014-09-04 아크티에볼라게트 에스케이에프 방법, 링 및 베어링

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4266417A (en) * 1978-05-09 1981-05-12 Daido Kogyo Co., Ltd. Steel flanged wheel rims for motorized bicycles or two-wheeled vehicles and a process for producing the rims
JPS57152337A (en) * 1981-03-16 1982-09-20 Topy Ind Ltd Rim and its manufacture
DE3344425A1 (de) * 1982-12-14 1984-06-14 Nissan Motor Co., Ltd., Yokohama, Kanagawa Radfelge fuer einen kraftfahrzeugreifen und verfahren zu ihrer herstellung
JPH07155882A (ja) * 1993-12-09 1995-06-20 Topy Ind Ltd 自動車ホイール用リムの製造方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1809605A (en) * 1929-04-08 1931-06-09 Sauzedde Claude Method of making wheel rims
US2138115A (en) * 1935-03-23 1938-11-29 Emil A Nelson Apparatus for forming disk wheels or the like
US2065275A (en) * 1935-08-12 1936-12-22 Donald M Hester Metal wheel and method of making the same
US2382485A (en) * 1941-11-03 1945-08-14 Borgwarner Corp Method of forming conical disks
US2359479A (en) * 1941-11-03 1944-10-03 Borg Warner Method of forming tapered wheels
US2825961A (en) * 1953-11-23 1958-03-11 Goodyear Tire & Rubber Method of forming an integral rim
US2983033A (en) * 1960-01-04 1961-05-09 Darwin S Cox Method of manufacturing dished disks and the like

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4266417A (en) * 1978-05-09 1981-05-12 Daido Kogyo Co., Ltd. Steel flanged wheel rims for motorized bicycles or two-wheeled vehicles and a process for producing the rims
JPS57152337A (en) * 1981-03-16 1982-09-20 Topy Ind Ltd Rim and its manufacture
DE3344425A1 (de) * 1982-12-14 1984-06-14 Nissan Motor Co., Ltd., Yokohama, Kanagawa Radfelge fuer einen kraftfahrzeugreifen und verfahren zu ihrer herstellung
JPH07155882A (ja) * 1993-12-09 1995-06-20 Topy Ind Ltd 自動車ホイール用リムの製造方法

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 006, no. 256 (M - 179) 15 December 1982 (1982-12-15) *
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 09 31 October 1995 (1995-10-31) *

Also Published As

Publication number Publication date
JP2004224292A (ja) 2004-08-12
US20040143968A1 (en) 2004-07-29
CN1517239A (zh) 2004-08-04

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