JPS5781903A - Production of rough shape slab for asymmetrical shape steel - Google Patents
Production of rough shape slab for asymmetrical shape steelInfo
- Publication number
- JPS5781903A JPS5781903A JP15685880A JP15685880A JPS5781903A JP S5781903 A JPS5781903 A JP S5781903A JP 15685880 A JP15685880 A JP 15685880A JP 15685880 A JP15685880 A JP 15685880A JP S5781903 A JPS5781903 A JP S5781903A
- Authority
- JP
- Japan
- Prior art keywords
- passes
- slab
- rough
- shape
- rolling
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
- B21B1/088—H- or I-sections
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
PURPOSE:To prevent the generation of overlap flaws in the joined part of a lower flange and a web by rolling a flat slab in a width direction to form a dog bone, and rolling the same with special guided passes then rolling this to an asymmetrical shape with rough molding finish passes. CONSTITUTION:A flat slab 1 is screwed down broadside by box type passes 2, 2', to an intermediate rough shape steel having a dog bone. This is then rotated 90 deg., after which it is rolled by using guided passes 7, 7'. In the passes 7, 7', the taper angle theta of the inner side of the lower flange part is set at 1.3-1.8theta s, with respect to rough molding finish passes 4, 4', the depth D at 1.5-2.5Ds, the thickness T at 0.9-1.1Ts, and the upper flange length F at a 0.7-1.0Fs range. The other dimensional shapes are approximately the same as those of the passes 4, 4'. After the slab is rolled with such passes 7, 7', it is roughly molded and finished to a rough shaped steel slab having an asymmetarical shape with the passes 4, 4'.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15685880A JPS5942564B2 (en) | 1980-11-07 | 1980-11-07 | Manufacturing method of rough shaped steel billet for asymmetric shaped steel |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15685880A JPS5942564B2 (en) | 1980-11-07 | 1980-11-07 | Manufacturing method of rough shaped steel billet for asymmetric shaped steel |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5781903A true JPS5781903A (en) | 1982-05-22 |
JPS5942564B2 JPS5942564B2 (en) | 1984-10-16 |
Family
ID=15636913
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15685880A Expired JPS5942564B2 (en) | 1980-11-07 | 1980-11-07 | Manufacturing method of rough shaped steel billet for asymmetric shaped steel |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5942564B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110665962A (en) * | 2019-08-30 | 2020-01-10 | 河北津西钢板桩型钢科技有限公司 | Pass system and rolling method of narrow-flange asymmetric steel rail beam hot rolling mill |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6121039U (en) * | 1984-07-12 | 1986-02-06 | 株式会社東芝 | Automatic cassette loading device |
-
1980
- 1980-11-07 JP JP15685880A patent/JPS5942564B2/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110665962A (en) * | 2019-08-30 | 2020-01-10 | 河北津西钢板桩型钢科技有限公司 | Pass system and rolling method of narrow-flange asymmetric steel rail beam hot rolling mill |
Also Published As
Publication number | Publication date |
---|---|
JPS5942564B2 (en) | 1984-10-16 |
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