JPS566751A - Press-forming method of rack of rack pinion type steering device - Google Patents

Press-forming method of rack of rack pinion type steering device

Info

Publication number
JPS566751A
JPS566751A JP8127779A JP8127779A JPS566751A JP S566751 A JPS566751 A JP S566751A JP 8127779 A JP8127779 A JP 8127779A JP 8127779 A JP8127779 A JP 8127779A JP S566751 A JPS566751 A JP S566751A
Authority
JP
Japan
Prior art keywords
rack
irregular shape
shaft part
blank
press
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.)
Granted
Application number
JP8127779A
Other languages
Japanese (ja)
Other versions
JPS5831257B2 (en
Inventor
Takashi Kikkai
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.)
NSK Ltd
Original Assignee
NSK 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 NSK Ltd filed Critical NSK Ltd
Priority to JP8127779A priority Critical patent/JPS5831257B2/en
Publication of JPS566751A publication Critical patent/JPS566751A/en
Publication of JPS5831257B2 publication Critical patent/JPS5831257B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Gears, Cams (AREA)
  • Forging (AREA)

Abstract

PURPOSE: To form rack tooth profiles free from formation of any burr in the face width direction by placing a bar-form blank provided with an irregular shape shaft part in the U-shaped groove of a lower die to restrain its plastic deformation and pressing the small arc face of the irregular shape shaft part by an upper die provided with rack teeth.
CONSTITUTION: A bar-form blank 1 is formed by an irregular shape shaft part 2 and cylindrical shaft end parts 3, 4 adjacent to both sides thereof. The irregular shape shaft part 2 is formed by a large arc 5, a small arc 6 and chords 7, 8 of an equal length. This blank 1 is placed in the U-shape groove of a lower die 9. The two shaft end parts 3, 4 are restrained by the fixing blocks 13, 14 of restraining members 10, 11 and blank holders 15, 16 to supress the expansion in the radial direction at the plastic deformation. Thence, an upper die 12 provided with rack teeth on its bottom surface is lowered to press the small arc 6 surface of the irregular shape shaft part 2 of the blank 1, whereby the rack tooth profiles are press- formed on the small arc 6 face side. All the tooth profiles of the rack are obtained in desired shapes by this method.
COPYRIGHT: (C)1981,JPO&Japio
JP8127779A 1979-06-29 1979-06-29 Press molding method for rack of rack and pinion steering device Expired JPS5831257B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8127779A JPS5831257B2 (en) 1979-06-29 1979-06-29 Press molding method for rack of rack and pinion steering device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8127779A JPS5831257B2 (en) 1979-06-29 1979-06-29 Press molding method for rack of rack and pinion steering device

Publications (2)

Publication Number Publication Date
JPS566751A true JPS566751A (en) 1981-01-23
JPS5831257B2 JPS5831257B2 (en) 1983-07-05

Family

ID=13741867

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8127779A Expired JPS5831257B2 (en) 1979-06-29 1979-06-29 Press molding method for rack of rack and pinion steering device

Country Status (1)

Country Link
JP (1) JPS5831257B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992020475A1 (en) * 1991-05-16 1992-11-26 Aeroquip Corporation Precision forming apparatus, method and article
KR100563597B1 (en) * 1998-08-29 2006-03-22 젯트에프 랭크씨스템 게엠베하 Gear rack production method and stamping device for implementing the method
JP2015009267A (en) * 2013-07-01 2015-01-19 株式会社ジェイテクト Rack shaft manufacturing apparatus and manufacturing method
JP2015010685A (en) * 2013-07-01 2015-01-19 株式会社ジェイテクト Blank and rack shaft manufacturing method using the same

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08155575A (en) * 1994-11-30 1996-06-18 Showa:Kk Rack shaft manufacturing method
JPH08174126A (en) * 1994-12-27 1996-07-09 Showa:Kk Rack axis manufacturing equipment

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992020475A1 (en) * 1991-05-16 1992-11-26 Aeroquip Corporation Precision forming apparatus, method and article
US5493888A (en) * 1991-05-16 1996-02-27 Aeroquip Corporation Precision forming apparatus, method and article
KR100563597B1 (en) * 1998-08-29 2006-03-22 젯트에프 랭크씨스템 게엠베하 Gear rack production method and stamping device for implementing the method
JP2015009267A (en) * 2013-07-01 2015-01-19 株式会社ジェイテクト Rack shaft manufacturing apparatus and manufacturing method
JP2015010685A (en) * 2013-07-01 2015-01-19 株式会社ジェイテクト Blank and rack shaft manufacturing method using the same

Also Published As

Publication number Publication date
JPS5831257B2 (en) 1983-07-05

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