FR2244002A1 - Resistance heating of rolled products, esp. steel tubes - using contact clamps travelling with the continuously moving tube - Google Patents
Resistance heating of rolled products, esp. steel tubes - using contact clamps travelling with the continuously moving tubeInfo
- Publication number
- FR2244002A1 FR2244002A1 FR7430627A FR7430627A FR2244002A1 FR 2244002 A1 FR2244002 A1 FR 2244002A1 FR 7430627 A FR7430627 A FR 7430627A FR 7430627 A FR7430627 A FR 7430627A FR 2244002 A1 FR2244002 A1 FR 2244002A1
- Authority
- FR
- France
- Prior art keywords
- steel tubes
- esp
- resistance heating
- tube
- continuously moving
- 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.)
- Withdrawn
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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
- C21D1/40—Direct resistance heating
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)
- Control Of Resistance Heating (AREA)
Abstract
The steel tubes are travelling continuously in a straight path, and rows of electric contacts are mounted on supports which move a limited distance in the same direction as the tube being heated. Two sets of contacts are used and, while one set is clamped to the tube and moving forward with it, the other set is disengaged and moving back to its starting position from where it is used to transmit the current while the first set returns to its initial position. Clamps are used which open for the return travel after the current has been switched off so not arcing occurs and the pref. system uses three sets of contacts, each being connected to one phase, of a three phase supply. Provides continuous, uniform heating of the entire tube without wear of the contact surfaces.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2347010 | 1973-09-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2244002A1 true FR2244002A1 (en) | 1975-04-11 |
Family
ID=5892988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7430627A Withdrawn FR2244002A1 (en) | 1973-09-14 | 1974-09-10 | Resistance heating of rolled products, esp. steel tubes - using contact clamps travelling with the continuously moving tube |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2244002A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0314667A1 (en) * | 1987-10-29 | 1989-05-03 | BÖHLER Gesellschaft m.b.H. | Process and apparatus for manufacturing thin wires, rods, pipes or sections made of steels or alloys with a low deformability, particularly of hardenable steels |
| US5058410A (en) * | 1989-03-14 | 1991-10-22 | Boehler Gesellschaft M.B.H. | Method and apparatus fo producing thin wire, rod, tube, and profiles, from steels and alloys with low deformability, particularly hardenable steels |
| WO2001034853A1 (en) * | 1999-11-12 | 2001-05-17 | Deville Marketing Corp. | A process for the continuous direct resistance heating of metallic semifinished products |
-
1974
- 1974-09-10 FR FR7430627A patent/FR2244002A1/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0314667A1 (en) * | 1987-10-29 | 1989-05-03 | BÖHLER Gesellschaft m.b.H. | Process and apparatus for manufacturing thin wires, rods, pipes or sections made of steels or alloys with a low deformability, particularly of hardenable steels |
| US5058410A (en) * | 1989-03-14 | 1991-10-22 | Boehler Gesellschaft M.B.H. | Method and apparatus fo producing thin wire, rod, tube, and profiles, from steels and alloys with low deformability, particularly hardenable steels |
| WO2001034853A1 (en) * | 1999-11-12 | 2001-05-17 | Deville Marketing Corp. | A process for the continuous direct resistance heating of metallic semifinished products |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| RE | Withdrawal of published application |