CN104690204A - All-solid-state variable-frequency induction heating device for isothermal forging upper and lower molds and heating method - Google Patents
All-solid-state variable-frequency induction heating device for isothermal forging upper and lower molds and heating method Download PDFInfo
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- CN104690204A CN104690204A CN201510077610.6A CN201510077610A CN104690204A CN 104690204 A CN104690204 A CN 104690204A CN 201510077610 A CN201510077610 A CN 201510077610A CN 104690204 A CN104690204 A CN 104690204A
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- induction heater
- isothermal forging
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- hydraulic press
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J17/00—Forge furnaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K29/00—Arrangements for heating or cooling during processing
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- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Forging (AREA)
Abstract
The invention provides an all-solid-state variable-frequency induction heating device for isothermal forging upper and lower molds (of which the diameters Phi are 900-2,000 mm) and a heating method. The all-solid-state variable-frequency induction heating device comprises an oil press upper die head, an oil press upright column, an isothermal forging upper mold, an upper mold induction heating furnace, an isothermal forging lower mold, a lower mold induction heating furnace, an oil press lower carriage, a 1# all-solid-state variable-frequency induction power supply and a 2# all-solid-state variable-frequency induction power supply. The all-solid-state variable-frequency induction heating device has the advantage that the heating time of the isothermal forging molds (of which the diameters Phi are 900-2,000 mm) is shortened to 4 to 8 hours, the heating efficiency is improved, the potential energy-saving effect is great, the production efficiency is improved, the molds are heated uniformly and long in service life, the quality of product is improved, the maintenance cost is reduced, and the all-solid-state variable-frequency induction heating device has an obvious technical and economic benefit.
Description
Technical field
What the present invention relates to is a kind of φ 900mm-φ 2000mm all solid state variable frequency induction heater of isothermal forging upper/lower die and heating means, belongs to isothermal forging equipment technology field.
Background technology
Isothermal forging (Isothermal-forging) is a kind of emerging Forging Technology technology as a branch of superplastic forming.It is widely used in the manufacture of vital part in the structural member such as spacecraft, aircraft turbine engine of aerospace industries and national defense industry, forging can be made to reach shape need close to part, reduce material consumption, reduce process-cycle, cost, this technique can obtain the optimized Isothermal Forging of comprehensive mechanical property in conjunction with heat treatment.
During heat parts, keep identical temperature with mould until forge and terminate, this feature, makes the impact that the modification of mould Quench and material is hardened eliminate completely.Isothermal forging should be carried out in accordance with regulations except heating except blank, also tackles mould and heats.Heating mould is a very important link of isothermal forging.
Along with the maximization of vital part in the structural member such as spacecraft, aircraft turbine engine of aerospace industries and national defense industry.The problem of φ 900mm-φ 2000mm isothermal forging dies heating will be more and more outstanding.Current isothermal forging dies heating generally adopts Resistant heating case, to the φ 900mm-φ 2000mm isothermal forging dies heat time will reach tens hours, energy consumption is high, as in production process resistance wire fracture, cannot hotly rush to repair, mold heated can be uneven, has impact to forging quality, die life, production efficiency.Resistance wire mold heated case frequency of maintenance is high, maintenance cost large, and production efficiency is lowly particularly outstanding in φ 900mm-φ 2000mm mold heated.Resistant heating case heating φ 900mm-φ 2000mm isothermal forging dies traditional in view of this, can not adapt to the demand with production development of equipping.
Develop a kind of φ 900mm-φ 2000mm isothermal forging upper/lower die all solid state variable frequency induction heater very important, find to generate an electromagnetic field between upper and lower induction furnace interference in development process, affect the independent normal work of all solid state variable frequency induction heater, the exploitation difficult point of encountering is summarized as follows:
1) upper/lower die temperature adjustment adjusting power respectively, but will magnetic interference be produced between induction furnace up and down, making two platform independent induction heating power power control serious vibration etc. cannot normally work;
2) kelvin effect of eddy-current heating makes the most advanced and sophisticated position of isothermal forging dies produce superfusion mold damage;
3) induction heater stray field produces the magnetic-leakage preventing problem of eddy current to hydraulic press column.
By producing the main cause of magnetic interference between upper and lower induction furnace, be have much relations with the electric current of independently upper/lower die all solid state frequency conversion heater inversion load, the phase difference of voltage, frequency difference.Apply traditional AC-DC-AC KK IGCT parallel inverter circuit, be difficult to head it off.
Summary of the invention
Object of the present invention is intended to overcome prior art above shortcomings, a kind of φ 900mm-φ 2000mm all solid state variable frequency induction heater of isothermal forging upper/lower die and heating means are proposed, the φ 900mm-φ 2000mm isothermal forging dies heat time can be shortened, improve heat hot efficiency and production efficiency, there is the features such as mould is heated evenly, product quality is high, die life is long, maintenance cost is low.
Technical solution of the present invention: all solid state variable frequency induction heater of φ 900mm-φ 2000mm isothermal forging upper/lower die, its structure comprises hydraulic press upper die head, hydraulic press column, isothermal forging mold, mold induction heater, isothermal forging bed die, bed die induction heater, planker under hydraulic press, the all solid state variable frequency induction power supply of 1#, the all solid state variable frequency induction power supply of 2#, wherein under hydraulic press upper die head and hydraulic press, planker is separately fixed at the upper and lower in hydraulic press column, bed die induction heater to be arranged under hydraulic press on planker and can with planker under hydraulic press movable and convenient disassembly, bed die induction heater is built with isothermal forging bed die, mold induction heater to be lifted on hydraulic press upper die head and can to move up and down, Bian Yu Re Pei material installs additional and press forging after isothermal forging takes out, isothermal forging mold hydraulic press upper die head is equipped with, the power output end of all solid state variable frequency induction power supply of 1# connects with the power input of mold induction heater, for the heating of mold induction heater, the power output end of all solid state variable frequency induction power supply of 2# connects with the power input of bed die induction heater, for the heating of bed die induction heater.
Advantage of the present invention: can shorten the φ 900mm-φ 2000mm isothermal forging dies heat time be 4-8 hour, improve heat hot efficiency, energy-conservation latent effect large, enhance productivity, even long service life heated by mould, improve the quality of products, reduce maintenance cost, develop this device and there is obviously technical economic benefit.
Accompanying drawing explanation
Accompanying drawing 1 is the structural representation of all solid state variable frequency induction heater of a kind of φ 900mm-φ 2000mm isothermal forging upper/lower die.
In figure 1 is hydraulic press upper die head, 2 are hydraulic press columns, 3 are isothermal forging molds, 4 are mold induction heaters, 5 are isothermal forging bed dies, 6 are bed die induction heaters, 7 are plankers under hydraulic press, 8 are 1# all solid state variable frequency induction power supplys, 9 is all solid state variable frequency induction power supplys of 2#.
Detailed description of the invention
Contrast accompanying drawing 1, the all solid state variable frequency induction heater of φ 900mm-φ 2000mm isothermal forging upper/lower die, its structure comprises hydraulic press upper die head 1, hydraulic press column 2, isothermal forging mold 3, mold induction heater 4, isothermal forging bed die 5, bed die induction heater 6, planker 7 under hydraulic press, the all solid state variable frequency induction power supply 8 of 1#, the all solid state variable frequency induction power supply 9 of 2#, wherein under hydraulic press upper die head 1 and hydraulic press, planker 7 is separately fixed at the upper and lower in hydraulic press column 2, bed die induction heater 6 to be arranged under hydraulic press on planker 7 and can with planker under hydraulic press 7 movable and convenient disassembly, bed die induction heater 6 is built with isothermal forging bed die 5, mold induction heater 4 to be lifted on hydraulic press upper die head 1 and can to move up and down, Bian Yu Re Pei material installs additional and press forging after isothermal forging takes out, isothermal forging mold 3 hydraulic press upper die head 1 is equipped with, the power output end of all solid state variable frequency induction power supply 8 of 1# connects with the power input of mold induction heater 4, for mold induction heater 4 heats, the power output end of all solid state variable frequency induction power supply 9 of 2# connects with the power input of bed die induction heater 6, for bed die induction heater 6 heats.
Described 1# all solid state variable frequency induction power supply 8 and all solid state variable frequency induction power supply 9 of 2# are that 2 IGBT variable-frequency power sources control by power control system.Wherein 1# all solid state variable frequency induction power supply 8 and all solid state variable frequency induction power supply 9 of 2# heat isothermal forging mold 3 and isothermal forging bed die 5 respectively.
Power control system adopts full digital integrating control, and it is triggered formed with control, system protection etc. by rectifier and trigger, Control of Voltage, Current Control, power adjusting, inversion.Rectifier and trigger adopts full digital counting phase shift system, and degree of regulation is high, and antijamming capability is strong.Voltage x current adopts two close cycles PI regulable control pattern, has and exports constant voltage ability, ensures that induction furnace terminal voltage is not with extraneous factor, changes, equipment is run more steady, power regulating range 10% as the change such as primary voltage, load impedance---and 100%.Equipment has overvoltage, overcurrent, phase shortage, load short circuits, low hydraulic pressure, temperature cross high defencive function.It is convenient that equipment has start and stop, and regulable control is flexible, the advantages such as working service is simple, efficiency is high, good stability.Owing to selecting IGPT frequency conversion circuit, the startup success rate of power supply is 100%, can ensure that two electric power output voltages are with push-push operation frequently.
Described mold induction heater 4 and bed die induction heater 6 are two parts up and down of induction heater, wherein mold induction heater 4 can move up and down on request, bed die induction heater 6 can move forward and backward and convenient disassembly with planker under hydraulic press 7, the middle heater of mold induction heater 4 and bed die induction heater 6 is heatproof stainless steel, heater outer wall adopts the insulation of silicon salt aluminum fiber, to improve the service life of heater, the induction coil of mold induction heater 4 and bed die induction heater 6 rationally arranges by the distribution of magnetic field intensity, ensure mould homogeneous heating, outside induction coil, yoke is housed, in case leak-stopping magnetic field is to the heating of the metals such as hydraulic press column, and improve the electrical efficiency of heating furnace.
Described mold induction heater 4, bed die induction heater 6, isothermal forging mold 3 and isothermal forging bed die 5 are respectively arranged a point for measuring temperature, by Siemens New Type PLC and industrial computer, after technological requirement parameters, variable-frequency power sources can control heating-up temperature and programming rate (comprising pressing process) automatically; Temperature measurement accuracy≤± 10 oC of heater, temperature-controlled precision≤± 10 oC during mould place stable state; Realize high-precision intelligent digital display, can carry out real time record to heating-up temperature, tendency chart can show in real time; There is the setting of parameter, store, call, amendment, the given and function such as failure logging, display; Control system is furnished with printer, printable dependent picture, thermograph curve, and leaves expansion interface, is convenient to and computer networking; Native system, compared with digital displaying meter control system, has friendly interface, controls flexibly, high reliability.
The present invention applies debugging on 3000T hydraulic press, and in field adjustable process, we realize and induction heating apparatus will be made normally to work have very large relation with the induction reactance of the inversion tank circuit, the adjustment of capacitive reactance.After induction heating apparatus operational factor has been debugged, the upper and lower mould of isothermal forging was by technological requirement 4-8 hour homogeneous heating to 950 DEG C insulation two hours, isothermal forging mold insulation frequency conversion voltage 550V, isothermal forging bed die insulation frequency conversion voltage 650V, the upper and lower mould of isothermal forging is incubated at 950 DEG C, error ± 5 DEG C.The upper and lower mold heated of isothermal forging is even, and inductor shell feel temperature is low, the upper and lower mould high insulating effect of isothermal forging, shell influence electricity, and start test equipment working stability was reliable continuously through 26 hours for induction heating apparatus.In pressing process, upper inductor can rise in charged insulation, but consider safety factor, isothermal workpiece is added by former technique power-off, the upper and lower mold temperature of isothermal forging declines about about 70 DEG C, close after adding isothermal forging workpiece blank inductor, heat up a few minutes isothermal forging dies temperature of full power rises only 950 DEG C of insulations, much smaller than the resistance heater heating-up time.Pressure testing several pieces of workpiece, the upper and lower mould induction heating apparatus of isothermal forging meets isothermal forging technological requirement completely.
The all solid state variable frequency induction heating means of φ 900mm-φ 2000mm isothermal forging upper/lower die: comprise the steps:
1) shift out planker 7 under hydraulic press, under hydraulic press, bed die induction heater 6 installed by planker 7;
2) isothermal forging bed die 5 is installed in bed die induction heater 6;
3) mold induction heater 4 is lifted on hydraulic press upper die head 1;
4) isothermal forging mold 3 is arranged on hydraulic press upper die head 1;
5) hydraulic press upper die head 1, isothermal forging mold 3 and mold induction heater 4 is raised;
6) under hydraulic press, planker 7, isothermal forging bed die 5, bed die induction heater 6 are displaced to hydraulic press center;
7) decline hydraulic press upper die head 1, isothermal forging mold 3, mold induction heater 4 make isothermal forging mold 3, isothermal forging bed die 5 and mold induction heater 4, bed die induction heater 6 pairs of center closed assemblies integral;
8) connect cooling water, mold induction heater 4 connects all solid state variable frequency induction power supply 8 of 1#, and bed die induction heater 6 connects all solid state variable frequency induction power supply 9 of 2#;
9) isothermal forging mold 3, isothermal forging bed die 5 heating-up temperature were to 950 DEG C of insulations 2 hours;
10) hydraulic press upper die head 1, isothermal forging mold 3 and mold induction heater 4 is raised;
11) the isothermal forging workpiece blank heated is added;
12) decline hydraulic press upper die head 1, isothermal forging mold 3 and mold induction heater 4, the mold induction heater 4 that closes, bed die induction heater 6 and isothermal forging mold 3, isothermal forging bed die 5;
13) 1# all solid state variable frequency induction power supply 8,2# all solid state variable frequency induction power supply 9 power per liter, isothermal forging mold 3, isothermal forging bed die 5 and isothermal forging workpiece are warmed up to 950 DEG C;
14) suppress isothermal forging workpiece, whole process is gone round and begun again.
Claims (7)
1. all solid state variable frequency induction heater of φ 900mm-φ 2000mm isothermal forging upper/lower die, it is characterized in that comprising hydraulic press upper die head (1), hydraulic press column (2), isothermal forging mold (3), mold induction heater (4), isothermal forging bed die (5), bed die induction heater (6), planker (7) under hydraulic press, the all solid state variable frequency induction power supply (8) of 1#, the all solid state variable frequency induction power supply (9) of 2#, wherein under hydraulic press upper die head (1) and hydraulic press, planker (7) is separately fixed at the upper and lower in hydraulic press column (2), under bed die induction heater (6) is arranged on hydraulic press, planker (7) above also can move forward and backward and convenient disassembly with planker under hydraulic press (7), bed die induction heater (6) is built with isothermal forging bed die (5), mold induction heater (4) is lifted on hydraulic press upper die head (1) and goes up and can move up and down, Bian Yu Re Pei material installs additional and press forging after isothermal forging takes out, isothermal forging mold (3) hydraulic press upper die head (1) is equipped with, the power output end of all solid state variable frequency induction power supply (8) of 1# connects with the power input of mold induction heater (4), for mold induction heater (4) heating, the power output end of all solid state variable frequency induction power supply (9) of 2# connects with the power input of bed die induction heater (6), for bed die induction heater (6) heating.
2. all solid state variable frequency induction heater of φ 900mm-φ 2000mm isothermal forging upper/lower die according to claim 1, it is characterized in that two parts up and down that described mold induction heater (4) and bed die induction heater (6) are induction heater, wherein mold induction heater (4) can move up and down on request, and bed die induction heater (6) can move forward and backward and convenient disassembly with planker under hydraulic press (7).
3. all solid state variable frequency induction heater of φ 900mm-φ 2000mm isothermal forging upper/lower die according to claim 1, the middle heater that it is characterized in that described mold induction heater (4) and bed die induction heater (6) is heatproof stainless steel, heater outer wall adopts the insulation of silicon salt aluminum fiber, to improve the service life of heater.
4. all solid state variable frequency induction heater of φ 900mm-φ 2000mm isothermal forging upper/lower die according to claim 3, it is characterized in that the induction coil of described mold induction heater (4) and bed die induction heater (6) arranges by magnetic field distribution, ensure mould homogeneous heating, outside induction coil, yoke is housed, in case leak-stopping magnetic field is to the heating of hydraulic press column metal, and improve the electrical efficiency of heating furnace.
5. all solid state variable frequency induction heater of φ 900mm-φ 2000mm isothermal forging upper/lower die according to claim 1, it is characterized in that described mold induction heater (4), bed die induction heater (6), isothermal forging mold (3) and isothermal forging bed die (5) are above each and a point for measuring temperature is set, by PLC and industrial computer, after technological requirement parameters, variable-frequency power sources can control heating-up temperature and programming rate automatically.
6. all solid state variable frequency induction heater of φ 900mm-φ 2000mm isothermal forging upper/lower die according to claim 3, is characterized in that temperature measurement accuracy≤± 10 oC of described heater, temperature-controlled precision≤± 10 oC during mould place stable state.
7. all solid state variable frequency induction heating means of isothermal forging upper/lower die as claimed in claim 1, is characterized in that comprising following processing step:
1) shift out planker (7) under hydraulic press, under hydraulic press, planker (7) is upper installs bed die induction heater 6;
2) isothermal forging bed die (5) is installed in bed die induction heater (6);
3) mold induction heater (4) is lifted on hydraulic press upper die head (1);
4) isothermal forging mold (3) is arranged on hydraulic press upper die head (1);
5) hydraulic press upper die head (1), isothermal forging mold (3) and mold induction heater (4) is raised;
6) under hydraulic press, planker (7), isothermal forging bed die (5), bed die induction heater (6) are displaced to hydraulic press center;
7) decline hydraulic press upper die head (1), isothermal forging mold (3), mold induction heater (4) make isothermal forging mold (3), isothermal forging bed die (5) and mold induction heater (4), bed die induction heater (6) integral to center closed assembly;
8) connect cooling water, mold induction heater (4) connects all solid state variable frequency induction power supply (8) of 1#, and bed die induction heater (6) connects all solid state variable frequency induction power supply (9) of 2#;
9) isothermal forging mold (3), isothermal forging bed die (5) heating-up temperature were to 950 DEG C of insulations 2 hours;
10) hydraulic press upper die head (1), isothermal forging mold (3) and mold induction heater (4) is raised;
11) the isothermal forging workpiece blank heated is added;
12) decline hydraulic press upper die head (1), isothermal forging mold (3) and mold induction heater (4), the mold induction heater (4) that closes, bed die induction heater (6) and isothermal forging mold (3), isothermal forging bed die (5);
13) 1# all solid state variable frequency induction power supply (8), 2# all solid state variable frequency induction power supply (9) power per liter, isothermal forging mold (3), isothermal forging bed die (5) and isothermal forging workpiece are warmed up to 950 DEG C;
14) suppress isothermal forging workpiece, whole process is gone round and begun again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510077610.6A CN104690204B (en) | 2015-02-13 | 2015-02-13 | Isothermal forging upper/lower die all solid state variable frequency induction heater and heating means |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510077610.6A CN104690204B (en) | 2015-02-13 | 2015-02-13 | Isothermal forging upper/lower die all solid state variable frequency induction heater and heating means |
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| CN104690204A true CN104690204A (en) | 2015-06-10 |
| CN104690204B CN104690204B (en) | 2016-10-19 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110687941A (en) * | 2019-08-15 | 2020-01-14 | 广东华中科技大学工业技术研究院 | System and method for synchronously controlling temperatures of upper die and lower die of 3D cover plate glass |
| CN111531109A (en) * | 2020-04-16 | 2020-08-14 | 德清县鑫宏锻造有限公司 | Constant temperature type hot forging die |
| CN114347346A (en) * | 2022-02-11 | 2022-04-15 | 抚顺琥珀泉艺术品有限公司 | Amber tea cup automatic production device and control method |
| RU2789249C2 (en) * | 2020-12-16 | 2023-01-31 | Открытое акционерное общество "Каменск-Уральский металлургический завод" | Apparatus for induction heating of large-sized dies in the process of isothermal forging |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110687941A (en) * | 2019-08-15 | 2020-01-14 | 广东华中科技大学工业技术研究院 | System and method for synchronously controlling temperatures of upper die and lower die of 3D cover plate glass |
| CN110687941B (en) * | 2019-08-15 | 2021-07-30 | 广东华中科技大学工业技术研究院 | System and method for synchronously controlling temperatures of upper die and lower die of 3D cover plate glass |
| CN111531109A (en) * | 2020-04-16 | 2020-08-14 | 德清县鑫宏锻造有限公司 | Constant temperature type hot forging die |
| RU2789249C2 (en) * | 2020-12-16 | 2023-01-31 | Открытое акционерное общество "Каменск-Уральский металлургический завод" | Apparatus for induction heating of large-sized dies in the process of isothermal forging |
| CN114347346A (en) * | 2022-02-11 | 2022-04-15 | 抚顺琥珀泉艺术品有限公司 | Amber tea cup automatic production device and control method |
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