JPS57158325A - Rack shaft having quench hardened layer continuous to tooth part and hardening method for tooth part of rack shaft - Google Patents

Rack shaft having quench hardened layer continuous to tooth part and hardening method for tooth part of rack shaft

Info

Publication number
JPS57158325A
JPS57158325A JP4321781A JP4321781A JPS57158325A JP S57158325 A JPS57158325 A JP S57158325A JP 4321781 A JP4321781 A JP 4321781A JP 4321781 A JP4321781 A JP 4321781A JP S57158325 A JPS57158325 A JP S57158325A
Authority
JP
Japan
Prior art keywords
tooth part
rack shaft
tooth
surface layer
high frequency
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.)
Pending
Application number
JP4321781A
Other languages
Japanese (ja)
Inventor
Ineo Nakagome
Ikuo Sakamoto
Yukio Hara
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.)
KOUSHIYUUHA NETSUREN KK
Neturen Co Ltd
Koshuha Netsuren KK
Original Assignee
KOUSHIYUUHA NETSUREN KK
Neturen Co Ltd
Koshuha Netsuren KK
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 KOUSHIYUUHA NETSUREN KK, Neturen Co Ltd, Koshuha Netsuren KK filed Critical KOUSHIYUUHA NETSUREN KK
Priority to JP4321781A priority Critical patent/JPS57158325A/en
Publication of JPS57158325A publication Critical patent/JPS57158325A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/32—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for gear wheels, worm wheels, or the like

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)
  • Gears, Cams (AREA)

Abstract

PURPOSE:To form a quench-hardened layer continuous to the surface layer of a tooth part by conducting high frequency electric current to the surface of a tooth profile from one end to the other end of the tooth part to raise the temp. up to prescribed temp. then cooling said part. CONSTITUTION:The tooth part L of a rack shaft W and the plane part 5 of a hardening device A are placed to face each other. The valley parts v', v'' at both terminals of the part L are inserted onto the leading ends of contactors 4a, 4b, and the contactors 4a, 4b are inserted and held in the parts v', v'' with a pressing mechanism 7, whereby a closed circuit is formed. When electric current is flowed to the closed circuit by turning a high frequency electric power source E on, the high frequency electric current flows through the surface layer of the member; at the same time, the surface layer of the part L evolves heat only in the surface layer part of the tooth profile G by the effect of the magnetic lines of force from the conductors 1a, 1b, thereby attaining the prescribed hardening temp. in a short time. At this time, the power source E is turned off and immediately cooling fluid is supplied to the hollow parts of the conductors 1a, 1b through pipes 6, and is injected through the injector holes provided in the plane part 5, whereby the surface of the tooth part L is cooled quickly.
JP4321781A 1981-03-26 1981-03-26 Rack shaft having quench hardened layer continuous to tooth part and hardening method for tooth part of rack shaft Pending JPS57158325A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4321781A JPS57158325A (en) 1981-03-26 1981-03-26 Rack shaft having quench hardened layer continuous to tooth part and hardening method for tooth part of rack shaft

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4321781A JPS57158325A (en) 1981-03-26 1981-03-26 Rack shaft having quench hardened layer continuous to tooth part and hardening method for tooth part of rack shaft

Publications (1)

Publication Number Publication Date
JPS57158325A true JPS57158325A (en) 1982-09-30

Family

ID=12657742

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4321781A Pending JPS57158325A (en) 1981-03-26 1981-03-26 Rack shaft having quench hardened layer continuous to tooth part and hardening method for tooth part of rack shaft

Country Status (1)

Country Link
JP (1) JPS57158325A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6144129A (en) * 1984-08-08 1986-03-03 Denki Kogyo Kk Quenching apparatus
JPH02115552U (en) * 1989-02-27 1990-09-17
EP1369337A1 (en) * 2002-06-06 2003-12-10 Toyoda Koki Kabushiki Kaisha Rack bar and method of heat-treating a rack bar
WO2010028939A1 (en) * 2008-09-10 2010-03-18 Zf Lenksysteme Gmbh Gear rack and inductive hardening method
CN112609046A (en) * 2020-11-13 2021-04-06 中国第一汽车股份有限公司 Gearbox fork shaft contact type induction quenching inductor and manufacturing process

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57120620A (en) * 1981-01-20 1982-07-27 Denki Kogyo Kk Hardening device for rack bar
JPS57120621A (en) * 1981-01-20 1982-07-27 Denki Kogyo Kk Hardening device for rack bar

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57120620A (en) * 1981-01-20 1982-07-27 Denki Kogyo Kk Hardening device for rack bar
JPS57120621A (en) * 1981-01-20 1982-07-27 Denki Kogyo Kk Hardening device for rack bar

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6144129A (en) * 1984-08-08 1986-03-03 Denki Kogyo Kk Quenching apparatus
JPS6360811B2 (en) * 1984-08-08 1988-11-25
JPH02115552U (en) * 1989-02-27 1990-09-17
EP1369337A1 (en) * 2002-06-06 2003-12-10 Toyoda Koki Kabushiki Kaisha Rack bar and method of heat-treating a rack bar
US7721617B2 (en) 2002-06-06 2010-05-25 Jtekt Corporation Heat-treated rack bar
WO2010028939A1 (en) * 2008-09-10 2010-03-18 Zf Lenksysteme Gmbh Gear rack and inductive hardening method
CN112609046A (en) * 2020-11-13 2021-04-06 中国第一汽车股份有限公司 Gearbox fork shaft contact type induction quenching inductor and manufacturing process

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