GB835825A - Method and apparatus for the induction heating of billets and the like - Google Patents
Method and apparatus for the induction heating of billets and the likeInfo
- Publication number
- GB835825A GB835825A GB32904/57A GB3290457A GB835825A GB 835825 A GB835825 A GB 835825A GB 32904/57 A GB32904/57 A GB 32904/57A GB 3290457 A GB3290457 A GB 3290457A GB 835825 A GB835825 A GB 835825A
- Authority
- GB
- United Kingdom
- Prior art keywords
- billet
- temperature
- surface temperature
- furnace
- stage
- 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
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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/1902—Control of temperature characterised by the use of electric means characterised by the use of a variable reference value
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
- G05D23/22—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element being a thermocouple
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Thermal Sciences (AREA)
- General Induction Heating (AREA)
- Forging (AREA)
Abstract
835,825. Forging; extruding. AJAX MAGNETHERMIC CORPORATION, [formerly MAGNETHERMIC CORPORATION]. Oct. 22, 1957 [Oct. 29, 1956], No. 32904/57. Drawings to Specification. Class 83 (4). [Also in Group XXXV] In order to evenly heat a thick metal billet (especially aluminium), in an induction furnace prior to forging or extruding, the furnace is automatically controlled (see Group XXXV) in two stages. In the first stage, full power is applied until the surface temperature of the billet reaches an upper limit (482‹ C.). This is higher than the temperature required for subsequent working, but not so high as to damage the billet. The surface temperature is then automatically maintained between this limit and a slightly lower temperature (474‹ C.) by intermittent energization of the furnace. This stage continues until the temperature difference between the centre and the surface of the billet falls to a first set value (28‹ C.) whereupon the datum setting of the automatic temperature control is shifted so as to maintain the surface temperature between a new top limit (465‹ C.) and the working temperature (460‹ C.). This second stage is terminated when the centre/ surface temperature difference falls to a second set value (3‹ C.). The billet is then automatically ejected from the furnace as soon as the intermittent heating allows the surface temperature to drop to the working value (460‹ C.). Specification 742,856 is referred to.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US835825XA | 1956-10-29 | 1956-10-29 | |
US1230439XA | 1956-10-29 | 1956-10-29 | |
US618783A US2859323A (en) | 1956-10-29 | 1956-10-29 | Differential temperature measurement on billets |
Publications (1)
Publication Number | Publication Date |
---|---|
GB835825A true GB835825A (en) | 1960-05-25 |
Family
ID=27374567
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB32904/57A Expired GB835825A (en) | 1956-10-29 | 1957-10-22 | Method and apparatus for the induction heating of billets and the like |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR1230439A (en) |
GB (1) | GB835825A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2251569A (en) * | 1990-11-06 | 1992-07-15 | Alform Alloys Ltd | Continuous extrusion of pre-heated billets |
CN104407642A (en) * | 2014-12-01 | 2015-03-11 | 杭州电子科技大学 | Temperature control method for continuous casting billet induction heating process, based on iterative learning control |
CN112782972A (en) * | 2019-11-07 | 2021-05-11 | 大族激光科技产业集团股份有限公司 | Laser heating temperature control method |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4032740A (en) * | 1975-04-07 | 1977-06-28 | Illinois Tool Works Inc. | Two-level temperature control for induction heating |
-
1957
- 1957-10-22 GB GB32904/57A patent/GB835825A/en not_active Expired
- 1957-10-28 FR FR750388A patent/FR1230439A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2251569A (en) * | 1990-11-06 | 1992-07-15 | Alform Alloys Ltd | Continuous extrusion of pre-heated billets |
CN104407642A (en) * | 2014-12-01 | 2015-03-11 | 杭州电子科技大学 | Temperature control method for continuous casting billet induction heating process, based on iterative learning control |
CN104407642B (en) * | 2014-12-01 | 2016-09-07 | 杭州电子科技大学 | A kind of continuous casting billet sensing heating process temp. control method controlled based on iterative learning |
CN112782972A (en) * | 2019-11-07 | 2021-05-11 | 大族激光科技产业集团股份有限公司 | Laser heating temperature control method |
CN112782972B (en) * | 2019-11-07 | 2022-12-02 | 大族激光科技产业集团股份有限公司 | Laser heating temperature control method |
Also Published As
Publication number | Publication date |
---|---|
FR1230439A (en) | 1960-09-15 |
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