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
Links
- 239000000463 material Substances 0.000 claims description 79
- 238000010438 heat treatment Methods 0.000 claims description 54
- 230000008719 thickening Effects 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 17
- 230000006698 induction Effects 0.000 claims description 13
- 239000000498 cooling water Substances 0.000 claims description 10
- 238000002347 injection Methods 0.000 claims description 8
- 239000007924 injection Substances 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 3
- 230000001788 irregular Effects 0.000 description 13
- 230000037303 wrinkles Effects 0.000 description 8
- 239000002344 surface layer Substances 0.000 description 5
- 229910000975 Carbon steel Inorganic materials 0.000 description 3
- 239000010962 carbon steel Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
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)
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 (fr) | 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 (fr) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
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 |
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 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52470A (en) * | 1975-06-23 | 1977-01-05 | Kobayashi:Kk | System for measuring contact resistance |
-
1982
- 1982-11-12 JP JP19773982A patent/JPS5987943A/ja active Granted
Patent Citations (1)
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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