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WO2008123654A1 - Barre de cremaillere de direction de type creux pour automobile et procede de fabrication associe - Google Patents

Barre de cremaillere de direction de type creux pour automobile et procede de fabrication associe Download PDF

Info

Publication number
WO2008123654A1
WO2008123654A1 PCT/KR2008/000463 KR2008000463W WO2008123654A1 WO 2008123654 A1 WO2008123654 A1 WO 2008123654A1 KR 2008000463 W KR2008000463 W KR 2008000463W WO 2008123654 A1 WO2008123654 A1 WO 2008123654A1
Authority
WO
WIPO (PCT)
Prior art keywords
rack bar
steering
gear
steering rack
extruding
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.)
Ceased
Application number
PCT/KR2008/000463
Other languages
English (en)
Inventor
Ho Jin Hwang
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.)
YOONSONG TECH Co Ltd
Original Assignee
YOONSONG TECH 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 YOONSONG TECH Co Ltd filed Critical YOONSONG TECH Co Ltd
Publication of WO2008123654A1 publication Critical patent/WO2008123654A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • B21K1/767—Toothed racks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/02—Making uncoated products
    • B21C23/04—Making uncoated products by direct extrusion
    • B21C23/08—Making wire, rods or tubes
    • B21C23/085—Making tubes
    • 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
    • B21K1/767—Toothed racks
    • B21K1/768—Toothed racks hollow
    • 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
    • B21K7/00—Making railway appurtenances; Making vehicle parts
    • B21K7/12—Making railway appurtenances; Making vehicle parts parts for locomotives or vehicles, e.g. frames, underframes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D3/00—Steering gears
    • B62D3/02—Steering gears mechanical
    • B62D3/12—Steering gears mechanical of rack-and-pinion type

Definitions

  • the present invention relates to a steering rack bar which is an important part of a steering system of an automobile for transferring directional manipulation of the steering wheel to wheels, and more particularly, to a method of manufacturing a steering rack bar more effectively, which improves the steering rack bar from a conventional solid type steering rack bar to a hollow type steering rack bar, thereby simplifying the construction of the steering rack bar and lightening the weight, and increasing efficiency of the manufacturing process.
  • Background Art
  • Such a conventional steering rack bar can be called a solid type steering rack bar, which is manufactured by machining a round rod to thereby form a rack gear having a desired diameter and outer appearance.
  • the conventional steering rack bar manufactured by the machining was significantly heavy, which is one of the important factors obstructing the fuel reduction and the lightness of the automobile.
  • an object of the present invention is to provide a steering rack bar which can be manufactured by extruding a tubular material to obtain a desired thickness and length of the material and forming a rack gear through a cutting or a hot forging, thereby reducing the weight and manufacturing cost of the steering rack bar and minimizing the dissipation of material.
  • the present invention provides a method of manufacturing a steering rack bar for an automobile, comprising the steps of cutting a prepared hollow tubular material 10 into a desired length in consideration of a length of a product to be manufactured and an extrusion degree; primarily extruding the cut material to have a desired maximum diameter in the whole; secondarily extruding the extruded material so that one side of the primarily extruded material, in other words, a gear portion 14 for forming a rack gear 13, is extruded to reduce an outer diameter thereof; tertiarily extruding the secondarily extracted material to form a plane portion 15 by compressing only one side of the gear portion 14 reduced through the secondary extruding process; working a rack gear for forming a rack gear 13 at the gear portion 14 through a broach working or a hot forging; heat treating the rack gear for improving a hardness by performing a heat- treatment of the worked rack gear 13; and grinding an entire outer periphery of the
  • the present invention is also characterized in that it is manufactured through an extrusion of a pipe shape (tubular shape) material 10, and is shaped into a tubular body having a hole passing through an entire length of the material, wherein a portion for forming a rack gear 13 is made thicker than a remaining portion, and the rack gear 13 is formed by performing a broach working or a hot forging on a plane portion 15, which is formed again after the reduction of a diameter by the extrusion.
  • a pipe shape tubular shape
  • the present invention as described above is a useful invention, which can assist the technical development of the automobile industry, because it is possible to simply and easily manufacture a steering rack bar, which is one of the substantially important parts of the automobile steering system, and it is also possible to manufacture it with low cost and achieve lightness of the steering rack bar to thereby contribute to the fuel reduction, and it is possible to provide a steering rack bar with more rigid and improved strength as compared to the conventional rack bar, and the like.
  • FIG. 1 is a process diagram showing a manufacturing method of the present invention
  • FIG. 2 is a view showing sequential states of the manufacturing method of the present invention.
  • the present invention is characterized by obtaining a length and a thickness required for a steering rack bar by extruding a solid tubular material, and completing the steering rack bar by performing a minimum machining work.
  • FIG. 1 is a view showing a sequence of the manufacturing process of the present invention
  • FIG. 2 is a view showing respective state of the sequence of the manufacturing process of the present invention.
  • a hollow pipe shaped material 10 is prepared and is cut into a desired length, which can be previously designed according to a length of a product to be manufactured and an extrusion degree.
  • the cut material is extruded to have a maximum diameter required in the whole.
  • a small diameter hole 11 having a small inside diameter is formed at one portion of the material where a rack gear will be formed, and a larger diameter hole 12 having a diameter larger than that of the small diameter hole is formed at the remaining portion of the material.
  • An extrusion is carried out on one side of the material extruded primarily, i.e., a gear portion 14 where the rack gear 13 will be formed to reduce an outer diameter.
  • a compressing work is carried out on only one side of the gear portion 14 with a diameter reduced through the secondary extrusion process to thereby form a plane portion 15.
  • a foaming process is carried out on a partial region at both ends of the material to thereby form a foaming portion 16 where a diameter thereof is reduced, and simultaneously a hole 17 with a predetermined depth is formed at the inside of the foaming portion 16 located at the end of the gear portion 14.
  • a process of calibrating a bending of the material may be further carried out in addition to the above process.
  • a rack gear 13 is formed at the gear portion 14 through a broaching work.
  • the rack gear 13 may be formed by a different method, which is carried out by a hot forging after heating the gear portion 14 locally.
  • a precision may be improved by a further precious cutting of the rack gear 13 when the rack gear 13 is formed through the hot forging.
  • a hardness of the rack gear 13 is improved by carrying out the heat-treatment on the worked rack gear 13.
  • a neat surface is achieved through a grinding of the entire outer periphery.
  • the steering rack bar 10a manufactured through the above processes is characterized in that it is manufactured through an extrusion of the pipe shape (tubular shape) material 10, and it is shaped as a hollow body (tubular shape) having a larger diameter hole 11 and a small diameter hole 12, and a portion for forming a rack gear 13 is constructed to be thicker than a different portion.
  • the rack gear 13 is characterized by formed by performing a broach working or a hot forging on the plane portion 15, which is obtained after the reduction of the diameter by the extrusion.
  • the rack gear 13 can well endure a large force and stress applied thereon.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Forging (AREA)

Abstract

L'invention concerne une barre de crémaillère de direction constituant une des pièces importantes qui permettent de transmettre aux roues une force de direction lorsque le volant est tourné pour diriger une automobile. L'invention concerne plus particulièrement un procédé de fabrication associé permettant de fabriquer plus simplement et plus efficacement une barre de crémaillère de direction légère. L'invention concerne encore une barre de crémaillère de direction ainsi fabriquée. Le procédé de fabrication selon l'invention consiste : à découper un matériau tubulaire creux préparé (10) selon une longueur souhaitée ; à extruder de façon primaire le matériau découpé pour obtenir un diamètre maximum d'ensemble souhaité ; à extruder de façon secondaire le matériau extrudé de sorte que seule une partie dentée (14) destinée à former un engrenage à crémaillère (13) soit extrudée pour réduire son diamètre extérieur ; à extruder de façon tertiaire un côté de la partie dentée (14) pour former une partie plane (15) ; à former un engrenage à crémaillère (13) au niveau de la partie dentée (14) par usinage à la broche ou forgeage à chaud ; à effectuer un traitement thermique sur l'engrenage à crémaillère usiné (13) pour améliorer sa dureté ; et à meuler l'intégralité du diamètre extérieur de la barre de crémaillère de direction pour obtenir une surface régulière, et analogue.
PCT/KR2008/000463 2007-04-06 2008-01-25 Barre de cremaillere de direction de type creux pour automobile et procede de fabrication associe Ceased WO2008123654A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020070033952A KR100794927B1 (ko) 2007-04-06 2007-04-06 자동차용 중공형 스티어링 래크바 및 그 제조방법
KR10-2007-0033952 2007-04-06

Publications (1)

Publication Number Publication Date
WO2008123654A1 true WO2008123654A1 (fr) 2008-10-16

Family

ID=39218189

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2008/000463 Ceased WO2008123654A1 (fr) 2007-04-06 2008-01-25 Barre de cremaillere de direction de type creux pour automobile et procede de fabrication associe

Country Status (2)

Country Link
KR (1) KR100794927B1 (fr)
WO (1) WO2008123654A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015010685A (ja) * 2013-07-01 2015-01-19 株式会社ジェイテクト ブランク及びこれを用いたラックシャフトの製造方法
US9158031B2 (en) 2007-04-10 2015-10-13 Halliburton Energy Services, Inc. Interchangeable measurement housings
WO2016152146A1 (fr) * 2015-03-23 2016-09-29 Neturen Co., Ltd. Barre de crémaillère et procédé de fabrication de ladite barre de crémaillère
JP2020192681A (ja) * 2020-08-14 2020-12-03 高周波熱錬株式会社 ラックバーの製造方法
CN112077246A (zh) * 2020-08-19 2020-12-15 常州市武进区洛阳新拓五金加工厂 一种摩托车、电动车减振装置中活塞杆的冷镦成形工艺

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101273225B1 (ko) * 2011-07-27 2013-06-11 현대위스코 주식회사 등속조인트용 중공형 드라이브 샤프트의 제조방법

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06246379A (ja) * 1992-05-26 1994-09-06 Tube Forming:Kk チューブ状のラックバーを成型する装置及びその方法
JP2002066685A (ja) * 2000-08-28 2002-03-05 Koshin Giken:Kk 中空ラックバー歯型転造用治工具
JP2003311366A (ja) * 2002-04-22 2003-11-05 Matsuoka Minako 中空ラック部材の製造方法
JP2006026703A (ja) * 2004-07-20 2006-02-02 Matsuoka Minako 中空ラックバー製造方法及び及び装置並びに中空ラックバー製造に用いる芯金工具

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06246379A (ja) * 1992-05-26 1994-09-06 Tube Forming:Kk チューブ状のラックバーを成型する装置及びその方法
JP2002066685A (ja) * 2000-08-28 2002-03-05 Koshin Giken:Kk 中空ラックバー歯型転造用治工具
JP2003311366A (ja) * 2002-04-22 2003-11-05 Matsuoka Minako 中空ラック部材の製造方法
JP2006026703A (ja) * 2004-07-20 2006-02-02 Matsuoka Minako 中空ラックバー製造方法及び及び装置並びに中空ラックバー製造に用いる芯金工具

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9158031B2 (en) 2007-04-10 2015-10-13 Halliburton Energy Services, Inc. Interchangeable measurement housings
JP2015010685A (ja) * 2013-07-01 2015-01-19 株式会社ジェイテクト ブランク及びこれを用いたラックシャフトの製造方法
WO2016152146A1 (fr) * 2015-03-23 2016-09-29 Neturen Co., Ltd. Barre de crémaillère et procédé de fabrication de ladite barre de crémaillère
JP2016179475A (ja) * 2015-03-23 2016-10-13 高周波熱錬株式会社 ラックバー及びラックバーの製造方法
CN107406093A (zh) * 2015-03-23 2017-11-28 高周波热錬株式会社 齿条和该齿条的制造方法
CN107406093B (zh) * 2015-03-23 2020-06-09 高周波热錬株式会社 齿条和该齿条的制造方法
JP2020192681A (ja) * 2020-08-14 2020-12-03 高周波熱錬株式会社 ラックバーの製造方法
CN112077246A (zh) * 2020-08-19 2020-12-15 常州市武进区洛阳新拓五金加工厂 一种摩托车、电动车减振装置中活塞杆的冷镦成形工艺
CN112077246B (zh) * 2020-08-19 2024-04-02 常州市武进区洛阳新拓五金加工厂 一种摩托车、电动车减振装置中活塞杆的冷镦成形工艺

Also Published As

Publication number Publication date
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