US20020062671A1 - Rolling machine capable of forming different types of teeth simultaneously - Google Patents

Rolling machine capable of forming different types of teeth simultaneously Download PDF

Info

Publication number
US20020062671A1
US20020062671A1 US09/750,981 US75098100A US2002062671A1 US 20020062671 A1 US20020062671 A1 US 20020062671A1 US 75098100 A US75098100 A US 75098100A US 2002062671 A1 US2002062671 A1 US 2002062671A1
Authority
US
United States
Prior art keywords
degree
rolling machine
rolling
tooth
section
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.)
Abandoned
Application number
US09/750,981
Other languages
English (en)
Inventor
Jung-Il Lee
Eun-taek Lee
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.)
HL Mando Corp
Original Assignee
Individual
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 Individual filed Critical Individual
Assigned to MANDO CORPORATION reassignment MANDO CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LEE EUN-TAEK, LEE, JUNG-IL
Publication of US20020062671A1 publication Critical patent/US20020062671A1/en
Abandoned legal-status Critical Current

Links

Images

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
    • B21H5/00—Making gear wheels, racks, spline shafts or worms
    • 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
    • B21H5/00—Making gear wheels, racks, spline shafts or worms
    • B21H5/02—Making gear wheels, racks, spline shafts or worms with cylindrical outline, e.g. by means of die rolls

Definitions

  • the present invention relates to a rolling machine; and, more particularly, to a rolling machine capable of forming different types of teeth which are coaxially formed with each other, at the same time.
  • a rolling is widely used to form, e.g., a thread by interposing a thread blank or thread base metal between two or more sets of forming dies to be rolled therebetween.
  • the metal plasticity of the thread blank enables the rolling. Since the rolling enables to product the thread having a higher accuracy and uniformity, manufacturing the normal thread is mainly achieved through the rolling.
  • thread rolling apparatuses or rolling machines There are many types of thread rolling apparatuses or rolling machines.
  • the types of thread rolling apparatuses to be used is determined depending on the property of the component and an amount of production.
  • the thread rolling is largely divided into three kinds of methods.
  • First is to use flat dies or rack dies.
  • a set of dies are arranged with the metal blank being supported therebetween and, then each of the dies is moved in an opposite direction to form the thread.
  • a rotational method is performed in such a manner that rolling dies positioned inside segment dies mounted outmost are rotated, with the metal blank interposed between the rolling dies being formed into the thread. At the moment, the metal blank is moved at 1 / 2 speed of the rolling die.
  • round dies are rotated about only their rotational axes, respectively, with the metal blank being rotated between both round dies.
  • two round dies are rotated about their rotational axes, being rotated around the metal blank interposed therebetween.
  • the first and third methods have an advantage in mass production.
  • the shape and dimension of the metal blank for the rolling may easily influence the life time of the rolling die and the accuracy of the product. Accordingly, an inappropriate shape of the base material causes the breakage or higher wear of the rolling die.
  • FIG. 1 there is shown a shaft for a starter motor which has been newly developed in recent days.
  • the starter motor has a helical spline 1 having eight teeth and a spline 2 having four teeth which are mounted on one shaft. It is difficult to form the splines shaped like this, i.e., the two splines having different tooth profiles by using a conventional rolling method.
  • the present invention provides a rolling machine for performing a rolling of different types of teeth mounted on a shaft, the machine comprising: a forming die including a first section and a second section provided with a camming profiled circumferential surface of 360 degree, the circumferential surface being divided into a guide surface of a predetermined angle, a gradual forming surface of a predetermined angle, a finishing section surface of a predetermined angle, and a rotation stop section surface of a predetermined angle, which are angularly positioned in that order on the circumferential surface; a power transmitting device for transmitting and disconnecting a driving force to the forming die; and a position detecting sensor for controlling a stop timing of the forming die.
  • FIG. 1 illustrates a perspective view of a shaft of a starter motor
  • FIG. 2 shows a schematic perspective view of forming dies in accordance with the present invention
  • FIG. 3 depicts a frontal view of a second rolling section in accordance with the present invention.
  • FIG. 4 present a scheme of an inventive rolling machine capable of forming different types of teeth simultaneously.
  • FIG. 2 shows a schematic perspective view of forming dies in accordance with the present invention
  • FIG. 3 depicts a frontal view of a second rolling section in accordance with the present invention
  • FIG. 4 present a scheme of the inventive rolling machine capable of forming different types of teeth simultaneously.
  • a preferred embodiment of the present invention examples a shaft of a starter motor(see FIG. 1) which has a helical spline 1 having eight teeth and a spline 2 having four teeth which are mounted on one shaft.
  • the inventive rolling machine is a roller type. As shown in FIG. 2, the roller type rolling machine is provided with two forming dies 10 whose rotational shafts are parallel with each other. One forming die 10 is movable, while position of the other is fixed, so that the forming dies 10 and a shaft blank, i.e., a starter motor shaft spline blank rotate together, depressing against one another.
  • a shaft blank i.e., a starter motor shaft spline blank
  • the workpiece i.e., the shaft blank has a different circumferential length between at a start point of the rolling and at an end point of the rolling, it has to be rolled simultaneously.
  • each of the forming dies 10 has a first section 11 for forming the helical spline having eight teeth, and a second section 12 for forming the spline having four teeth, which are mounted on a same shaft.
  • the first section 11 and the second section 12 has a tooth profile having a same pitch as that of a tooth of the a starter motor shaft to be produced.
  • the tooth of the first section 11 and the second section 12 is offset to the tooth of the starter motor shaft to be produced. That is, a crest of the tooth of the sections 11 and 12 corresponds to recess of the tooth of the starter motor shaft to be produced.
  • the forming dies 10 has a camming profile in its cross-section instead of a real circle.
  • a circumferential surface of 360 degree of the forming dies 10 is divided into a guide surface 13 of a predetermined angle, a gradual forming surface 14 of a predetermined angle, a finishing section surface 15 of a predetermined angle, and a rotation stop section surface 16 of a predetermined angle, which are angularly positioned in that order.
  • the guide surface 13 has a same curvature so as to serve to guide at the beginning of the rolling. accordingly, an amount of cutting advancement of the forming dies 10 becomes very small. It is preferable that the guide surface 13 range from 80 degree to 100 degree in the circumferential surface of 360 degree.
  • the gradual forming surface 14 has a crest of the tooth of the forming dies which has a higher height along the circumference from an initial point toward a completion point, to progressively form in the shaft blank the helical spline having eight teeth and the spline having four teeth. It is preferable that the gradual forming surface 14 range from 125 degree to 145 degree in the circumferential surface of 360 degree. Further, the gradual forming surface 14 is eccentrically formed to have a radius from a central axis which becomes larger in 0.02 mm increment from tooth to tooth, so that it progressively forms the tooth of the spline.
  • the finishing section surface 15 is contiguous to the gradual forming surface 14 and has a range from 80 degree to 100 degree in the circumferential surface of 360 degree.
  • the tooth profile of the finishing section surface 15 is same as that of the completion point of the gradual forming surface 14 .
  • the rotation stop section surface 16 is formed between the remainder angle about 35 to 55 degree in the circumferential surface of 360 degree.
  • the rotation stop section surface 16 does not have a tooth for performing the rolling of the tooth, it functions to correct different rolling environments and the different circumferential speeds. That is, when an initial point of the rotation stop section surface 16 arrives at the workpiece, the driving force is disconnected from the forming dies 10 and then the rotation of the forming dies 10 is temporarily stopped. The driving force is supplied to rotate the forming dies 10 at the beginning point of the guide surface 13 .
  • the inventive rolling machine is provided with a power transmitting device 20 for controlling the transmission of the driving force to the forming dies 10 , and a position detecting sensor 30 for controlling the stop timing of the forming dies 10 .
  • the power transmitting device 20 includes a driving motor 21 for generating the driving force, a driving shaft 24 receiving the driving force from the driving motor 21 , a clutch 23 for connecting and disconnecting the driving force from the driving shaft 24 , and a brake 23 for stopping the rotation of the driving shaft 24 .
  • the position detecting sensor 30 includes a driving force disconnecting sensor 31 positioned at the initial point of the rotation stop section surface 16 , and a stop check sensor 32 positioned at a center portion of the rotation stop section surface 16 . That is, the driving force disconnecting sensor 31 actuates the clutch 20 to disconnect the driving force, when the initial point of the rotations stop section surface 16 meets the shaft blank, i.e., the workpiece, during the rotation of the forming dies 10 . Further, the stop check sensor 32 actuates the brake 23 to stop the forming dies 10 being rotated due to the inertia after the disconnection of the driving force.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
US09/750,981 2000-11-24 2000-12-28 Rolling machine capable of forming different types of teeth simultaneously Abandoned US20020062671A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR2000-70232 2000-11-24
KR10-2000-0070232A KR100443883B1 (ko) 2000-11-24 2000-11-24 이형 치형 동시 전조장치

Publications (1)

Publication Number Publication Date
US20020062671A1 true US20020062671A1 (en) 2002-05-30

Family

ID=19701111

Family Applications (1)

Application Number Title Priority Date Filing Date
US09/750,981 Abandoned US20020062671A1 (en) 2000-11-24 2000-12-28 Rolling machine capable of forming different types of teeth simultaneously

Country Status (4)

Country Link
US (1) US20020062671A1 (ja)
EP (1) EP1208927A3 (ja)
JP (1) JP2002160035A (ja)
KR (1) KR100443883B1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070209419A1 (en) * 2006-02-20 2007-09-13 Yasuo Kinoshita Rolling die and method for forming thread or worm and spline having small number of teeth by rolling simultaneously

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010000083A1 (de) 2010-01-14 2011-07-28 Ludwig Hettich & Co., 78713 Verfahren und Walzbacken zur Herstellung einer Schraube
KR101425966B1 (ko) * 2013-05-23 2014-08-01 태림산업(주) 차량용 조향장치의 샤프트 가공장치 및 이를 이용한 가공방법

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR974710A (fr) * 1947-11-11 1951-02-26 Mapre Procédé et dispositif pour laminer les filets ou profils similaires
US2886990A (en) * 1954-08-30 1959-05-19 Nat Broach & Mach Apparatus for rolling gears
DE1752245A1 (de) * 1968-04-25 1971-05-13 Pee Wee Maschinen U Appbau Wer Verzahnte Profilrolle
CH565002A5 (en) * 1973-04-18 1975-08-15 Thommen Revue Ag Surface machining system by rollers - has additional pair turning freely on shafts driving main ones
CH647430A5 (de) * 1980-09-19 1985-01-31 Grob Ernst Fa Vorrichtung und verfahren zum kaltwalzen von profilen durch abwaelzen auf dem umfang eines dabei rotierenden werkstueckes.
JPS58218337A (ja) * 1982-06-02 1983-12-19 Mitsuba Denki Seisakusho:Kk 変形ウオ−ムシヤフトの製造方法
JPS6127534U (ja) * 1984-07-20 1986-02-19 オ−エスジ−株式会社 転造ダイス
JP2800132B2 (ja) * 1990-07-31 1998-09-21 株式会社ツガミ 自動位相調整装置付転造盤
JP2555486B2 (ja) * 1991-04-15 1996-11-20 三菱電機株式会社 回転軸のストッパ付ヘリカルスプライン形成方法
DE19526071A1 (de) * 1995-07-18 1997-01-23 Rollwalztechnik Abele & Hoelti Verfahren zum Walzen von Profilen in ein Werkstück
DE19718257C2 (de) * 1997-04-30 2001-06-07 Bad Dueben Profilwalzmaschinen Profilwalzmaschine zum Walzen eines rotationssymmetrischen Werkstücks mit einem präzisen Außenprofil
DE19722310A1 (de) * 1997-05-28 1998-12-03 Jung Pee Wee Kaltform & Rohrbe Kaltwalzmaschine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070209419A1 (en) * 2006-02-20 2007-09-13 Yasuo Kinoshita Rolling die and method for forming thread or worm and spline having small number of teeth by rolling simultaneously
US7392680B2 (en) * 2006-02-20 2008-07-01 Toyota Jidosha Kabushiki Kaisha Rolling die and method for forming thread or worm and spline having small number of teeth by rolling simultaneously

Also Published As

Publication number Publication date
KR100443883B1 (ko) 2004-08-09
EP1208927A2 (en) 2002-05-29
JP2002160035A (ja) 2002-06-04
KR20020040242A (ko) 2002-05-30
EP1208927A3 (en) 2003-05-02

Similar Documents

Publication Publication Date Title
US4870848A (en) Tapered rolled thread bar joint
JP3034447B2 (ja) 歯車多段転造装置
US20020062671A1 (en) Rolling machine capable of forming different types of teeth simultaneously
US7584636B2 (en) Metal spinning method and apparatus
US20060272375A1 (en) Method for producing an inner contour with an internal arbor acting on the inside wall of a workpiece
US6470724B1 (en) Tool for producing a gear part having external toothing
JP4368533B2 (ja) スパークプラグの製造方法及び製造装置
RU2006105509A (ru) Способ изготовления компонента, имеющего зубья с внутренним зацеплением, и зубонакатный станок для его осуществления
JP3746855B2 (ja) 転造平ダイスを有する転造盤及び転造加工方法
JPH11169985A (ja) 歯付円筒部品の成形方法
JP4434332B2 (ja) 円板における環状周壁部の成形方法
JP2003033841A (ja) ボールねじのねじ軸の製造方法
JPH04105720A (ja) クラウンローラの製造方法
JP3739154B2 (ja) 内周歯付円筒状部を有する部品の製造方法
US20030200781A1 (en) Method of tensile flow forming
TWI267412B (en) Method of manufacturing part with internal gear and rolling machine
JPS623841A (ja) テ−パ部品の製造方法および装置
JPH0543956Y2 (ja)
KR19990075804A (ko) 자동차용 동력전달기어 단조성형 장치
SU1726100A1 (ru) Способ накатывани резьбовых профилей двум роликами
JP2744767B2 (ja) 段付き噛合部材の転造加工方法、および転造加工装置
JPH0710820Y2 (ja) 歯車転造装置の割り切り検出装置
JP2023092216A (ja) 逐次成形装置及び逐次成形方法
CN116393562A (zh) 一种高精度等间距涡卷弹簧的制作装置及制作方法
JPH04171310A (ja) 非円形ねじ，非円形ねじ用転造ダイスおよび非円形ねじの転造加工方法

Legal Events

Date Code Title Description
AS Assignment

Owner name: MANDO CORPORATION, KOREA, REPUBLIC OF

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:LEE, JUNG-IL;LEE EUN-TAEK;REEL/FRAME:011824/0965

Effective date: 20010411

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION