JPH0212657B2 - - Google Patents

Info

Publication number
JPH0212657B2
JPH0212657B2 JP57197739A JP19773982A JPH0212657B2 JP H0212657 B2 JPH0212657 B2 JP H0212657B2 JP 57197739 A JP57197739 A JP 57197739A JP 19773982 A JP19773982 A JP 19773982A JP H0212657 B2 JPH0212657 B2 JP H0212657B2
Authority
JP
Japan
Prior art keywords
frequency
thickness
tube material
thickened
heating coil
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.)
Expired - Lifetime
Application number
JP57197739A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5987943A (ja
Inventor
Kenichi Okada
Hiroshi Asao
Hideo Yonemura
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP19773982A priority Critical patent/JPS5987943A/ja
Publication of JPS5987943A publication Critical patent/JPS5987943A/ja
Publication of JPH0212657B2 publication Critical patent/JPH0212657B2/ja
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/08—Upsetting

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
JP19773982A 1982-11-12 1982-11-12 管材の増肉加工方法および装置 Granted JPS5987943A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19773982A JPS5987943A (ja) 1982-11-12 1982-11-12 管材の増肉加工方法および装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19773982A JPS5987943A (ja) 1982-11-12 1982-11-12 管材の増肉加工方法および装置

Publications (2)

Publication Number Publication Date
JPS5987943A JPS5987943A (ja) 1984-05-21
JPH0212657B2 true JPH0212657B2 (en]) 1990-03-23

Family

ID=16379530

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19773982A Granted JPS5987943A (ja) 1982-11-12 1982-11-12 管材の増肉加工方法および装置

Country Status (1)

Country Link
JP (1) JPS5987943A (en])

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2821095B2 (ja) * 1994-01-24 1998-11-05 大和ハウス工業株式会社 柱・梁接合構造
US5713130A (en) * 1994-01-24 1998-02-03 Daiwa House Industry Co., Ltd. Partially thick-walled elongated metallic member and methods of making and connecting the same
JP2742395B2 (ja) * 1994-06-14 1998-04-22 大和ハウス工業株式会社 増肉補強鋼管継手および鋼管柱
JP5069549B2 (ja) * 2007-12-21 2012-11-07 昭和電工株式会社 ダイレス加工方法
CN103386451B (zh) * 2012-05-09 2015-07-08 雷帮荣 一种大直径活塞塞头、台阶轴或油缸成型工艺及其加工设备
CN110899591B (zh) * 2019-12-26 2021-01-01 徐州达一重锻科技有限公司 一种全加热钢管加厚成型液压机

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52470A (en) * 1975-06-23 1977-01-05 Kobayashi:Kk System for measuring contact resistance

Also Published As

Publication number Publication date
JPS5987943A (ja) 1984-05-21

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