CA2035502A1 - No-twist slit-rolling approach ("nta") apparatus and method for manufacturing steel reinforcing rod - Google Patents
No-twist slit-rolling approach ("nta") apparatus and method for manufacturing steel reinforcing rodInfo
- Publication number
- CA2035502A1 CA2035502A1 CA2035502A CA2035502A CA2035502A1 CA 2035502 A1 CA2035502 A1 CA 2035502A1 CA 2035502 A CA2035502 A CA 2035502A CA 2035502 A CA2035502 A CA 2035502A CA 2035502 A1 CA2035502 A1 CA 2035502A1
- Authority
- CA
- Canada
- Prior art keywords
- stands
- nta
- rolls
- steel reinforcing
- offset
- 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
- 229910000831 Steel Inorganic materials 0.000 title abstract 3
- 238000000034 method Methods 0.000 title abstract 3
- 230000003014 reinforcing effect Effects 0.000 title abstract 3
- 238000005096 rolling process Methods 0.000 title abstract 3
- 239000010959 steel Substances 0.000 title abstract 3
- 238000004519 manufacturing process Methods 0.000 title abstract 2
- 238000007796 conventional method Methods 0.000 abstract 1
Landscapes
- Metal Rolling (AREA)
- Shearing Machines (AREA)
- Wire Processing (AREA)
Abstract
A no-twist ("NTA") apparatus and method for manufacturing steel reinforcing bar which allows steel reinforcing bar to be manufactured with greater speed and precision than by conventional methods. The NTA method employs numerous stands, with the shafts of the rolls of the first two stands offset 45° from a predetermined plane and 90° from each other. The third and fourth stands comprise rolling and splitting stands and the shafts of their rollers are perpendicular or parallel to the predetermined plane and form equal angles with the shafts of the first two stands so that the bar can be fed to the rolling and splitting stands without intermediate twisting and the single bar can be split into a plurality of bar segments. The remaining stands are arranged into at least two lines of stands, in each of which the sides of the rolls of the first stand are offset 45° in a first direction from the predetermined plane and the sides of the rolls of the second stand are offset 45° in a second direction opposite to said first direction relative to the predetermined plane. Alternatively, the sides of the rolls of the first and second stands in the two lines are respectively offset either by 90 and 0° or 0°
and 90°.
and 90°.
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US47428590A | 1990-02-02 | 1990-02-02 | |
| US474,285 | 1990-02-02 | ||
| EP90108378A EP0439666B1 (en) | 1990-02-02 | 1990-05-03 | No-twist slit-rolling approach ("NTA") apparatus and method for manufacturing steel reinforcing rod |
| EP90108378.2 | 1990-05-03 | ||
| US549,351 | 1990-07-06 | ||
| US07/549,351 US5027632A (en) | 1990-02-02 | 1990-07-06 | No-twist slit-rolling approach ("NTA") apparatus and method for manufacturing steel reinforcing rod |
| SG67994A SG67994G (en) | 1990-02-02 | 1994-05-20 | No-twist slit-rolling approach ("NTA") apparatus and method for manufacturing steel reinforcing rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2035502A1 true CA2035502A1 (en) | 1991-08-03 |
| CA2035502C CA2035502C (en) | 1999-06-01 |
Family
ID=27441933
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002035502A Expired - Fee Related CA2035502C (en) | 1990-02-02 | 1991-02-01 | No-twist slit-rolling approach ("nta") apparatus and method for manufacturing steel reinforcing rod |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPH0815613B2 (en) |
| CN (1) | CN1037943C (en) |
| CA (1) | CA2035502C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113369300B (en) * | 2021-06-07 | 2023-03-21 | 阳春新钢铁有限责任公司 | Method for eliminating torsion defect generated by splitting rolled piece |
-
1991
- 1991-02-01 CA CA002035502A patent/CA2035502C/en not_active Expired - Fee Related
- 1991-02-01 JP JP3032463A patent/JPH0815613B2/en not_active Expired - Fee Related
- 1991-02-02 CN CN91100666.4A patent/CN1037943C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04220110A (en) | 1992-08-11 |
| CA2035502C (en) | 1999-06-01 |
| CN1054205A (en) | 1991-09-04 |
| CN1037943C (en) | 1998-04-08 |
| JPH0815613B2 (en) | 1996-02-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |