CN104690204B - Isothermal forging upper/lower die all solid state variable frequency induction heater and heating means - Google Patents
Isothermal forging upper/lower die all solid state variable frequency induction heater and heating means Download PDFInfo
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- CN104690204B CN104690204B CN201510077610.6A CN201510077610A CN104690204B CN 104690204 B CN104690204 B CN 104690204B CN 201510077610 A CN201510077610 A CN 201510077610A CN 104690204 B CN104690204 B CN 104690204B
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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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Abstract
The present invention is a kind of φ 900mm φ 2000mm isothermal forging upper/lower die all solid state variable frequency induction heater and heating means, and its structure includes planker under hydraulic press upper die head, hydraulic press column, isothermal forging mold, mold induction heater, isothermal forging lower mold, lower mold induction heater, hydraulic press, 1# all solid state variable frequency induction power supply, 2# all solid state variable frequency induction power supply.Advantage: shorten φ 900mm φ 2000mm isothermal forging dies heat time heating time be 48 hours, improve the heating thermal efficiency, energy-conservation latent effect is big, improve production efficiency, mould is heated, and uniform service life is long, improve product quality, reduce maintenance cost, develop this device and there is obviously technical economic benefit.
Description
Technical field
The present invention relates to a kind of φ 900mm-φ 2000mm isothermal forging upper/lower die all solid state variable frequency induction heater and heating means, belong 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 members such as the spacecraft of aerospace industries, aircraft turbine engine and national defense industry, forging can be made to reach the shape need close to part, reduce material consumption, reducing process-cycle, cost, this technique combines heat treatment can obtain the optimized Isothermal Forging of comprehensive mechanical property.
During heat parts, the temperature identical with mould holding is until forging terminates, and this feature, the impact making the modification of mould Quench and material harden is completely eliminated.Isothermal forging is in addition to blank should be carried out in accordance with regulations heating, and also reply mould heats.Heating mould is a very important link of isothermal forging.
Along with the maximization of vital part in the structural members such as the spacecraft of aerospace industries, aircraft turbine engine and national defense industry.The problem of φ 900mm-φ 2000mm isothermal forging dies heating will be more and more prominent.Isothermal forging dies heats commonly used Resistant heating case at present, to heat time heating time from the point of view of φ 900mm-φ 2000mm isothermal forging dies will up to tens hours, energy consumption high, such as production process in resistance wire fracture, cannot hot rush to repair, mould heating can be uneven, all has an impact forging quality, die life, production efficiency.Resistance wire mould adds hot tank frequency of maintenance height, maintenance cost greatly, and production efficiency is lowly especially prominent in the heating of φ 900mm-φ 2000mm mould.The most traditional Resistant heating case heating φ 900mm-φ 2000mm isothermal forging dies, does not the most adapt to the demand of equipment and production development.
A kind of φ 900mm-φ 2000mm isothermal forging upper/lower die all solid state variable frequency induction heater of exploitation is particularly significant, development process finds to produce between upper and lower induction furnace the interference of electromagnetic field, affecting the independent normal work of all solid state variable frequency induction heater, the exploitation difficult point encountered is summarized as follows:
1) upper/lower die homoiothermic adjusting power respectively, but magnetic interference will be produced between upper and lower induction furnace, making two platform independent induction heating power power control serious vibrations etc. cannot normally work；
2) kelvin effect of sensing heating makes position, isothermal forging dies tip produce superfusion mold damage；
3) sensing heater stray field produces the magnetic-leakage preventing problem of eddy current to hydraulic press column.
The main cause of magnetic interference will be produced up and down between induction furnace, be that the electric current of frequency conversion heater inversion all solid state with independent upper/lower die load, the phase difference of voltage, frequency difference have much relations.Apply traditional AC-DC-AC KK IGCT parallel inverter circuit, be difficult to solve this problem.
Summary of the invention
The purpose of the present invention is intended to overcome deficiencies of the prior art, a kind of φ 900mm-φ 2000mm isothermal forging upper/lower die all solid state variable frequency induction heater and heating means are proposed, φ 900mm-φ 2000mm isothermal forging dies heat time heating time can be shortened, improve the heating thermal efficiency and production efficiency, there is the features such as mould is heated uniformly, product quality height, length die life, maintenance cost are low.
nullThe technical solution of the present invention: φ 900mm-φ 2000mm isothermal forging upper/lower die all solid state variable frequency induction heater，Its structure includes hydraulic press upper die head、Hydraulic press column、Isothermal forging mold、Mold induction heater、Isothermal forging lower mold、Lower mold induction heater、Planker under hydraulic press、1# all solid state variable frequency induction power supply、2# all solid state variable frequency induction power supply，Wherein under hydraulic press upper die head and hydraulic press, planker is separately fixed at the upper and lower in hydraulic press column，Lower mold induction heater be arranged under hydraulic press on planker and can with planker under hydraulic press movable and convenient disassembly，Lower mold induction heater is built with isothermal forging lower mold，Mold induction heater is lifted on hydraulic press upper die head and can move up and down，It is easy to heat material install additional and press forging after isothermal forging takes out，Equipped with isothermal forging mold on hydraulic press upper die head，The power output end of 1# all solid state variable frequency induction power supply connects with the power input of mold induction heater，Heat for mold induction heater，The power output end of 2# all solid state variable frequency induction power supply connects with the power input of lower mold induction heater，Heat for lower mold induction heater.
Advantages of the present invention: can shorten φ 900mm-φ 2000mm isothermal forging dies heat time heating time be 4-8 hour, improve the heating thermal efficiency, energy-conservation latent effect is big, improve production efficiency, mould is heated, and uniform service life is long, improve product quality, reduce maintenance cost, develop this device and there is obviously technical economic benefit.
Accompanying drawing explanation
Accompanying drawing 1 is the structural representation of a kind of φ 900mm-φ 2000mm isothermal forging upper/lower die all solid state variable frequency induction heater.
In figure 1 is hydraulic press upper die head, 2 is hydraulic press column, 3 is isothermal forging mold, 4 is mold induction heater, 5 is isothermal forging lower mold, 6 is lower mold induction heater, 7 is planker under hydraulic press, 8 is 1# all solid state variable frequency induction power supply, 9 is 2# all solid state variable frequency induction power supply.
Detailed description of the invention
nullComparison accompanying drawing 1，φ 900mm-φ 2000mm isothermal forging upper/lower die all solid state variable frequency induction heater，Its structure includes hydraulic press upper die head 1、Hydraulic press column 2、Isothermal forging mold 3、Mold induction heater 4、Isothermal forging lower mold 5、Lower mold induction heater 6、Planker 7 under hydraulic press、1# all solid state variable frequency induction power supply 8、2# all solid state variable frequency induction power supply 9，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，Lower mold induction heater 6 be arranged under hydraulic press on planker 7 and can with planker under hydraulic press 7 movable and convenient disassembly，Lower mold induction heater 6 is built with isothermal forging lower mold 5，Mold induction heater 4 is lifted on hydraulic press upper die head 1 and can move up and down，It is easy to heat material install additional and press forging after isothermal forging takes out，Equipped with isothermal forging mold 3 on hydraulic press upper die head 1，The power output end of 1# all solid state variable frequency induction power supply 8 connects with the power input of mold induction heater 4，Heat for mold induction heater 4，The power output end of 2# all solid state variable frequency induction power supply 9 connects with the power input of lower mold induction heater 6，Heat for lower mold induction heater 6.
The all solid state variable frequency induction power supply 9 of described 1# all solid state variable frequency induction power supply 8 and 2# is that 2 IGBT variable-frequency power sources are by power control system control.Wherein isothermal forging mold 3 and isothermal forging lower mold 5 are heated by 1# all solid state variable frequency induction power supply 8 and 2# all solid state variable frequency induction power supply 9 respectively.
Power control system uses full digital integrating control, and it is triggered formed with control, system protection etc. by rectifier and trigger, Control of Voltage, electric current control, power adjustments, inversion.Rectifier and trigger uses full digital counting phase shift system, and degree of regulation is high, and capacity of resisting disturbance is strong.Voltage x current uses two close cycles PI to regulate control model, has output constant voltage ability, it is ensured that induction furnace terminal voltage, not with extraneous factor, changes such as the change such as primary voltage, load impedance, makes equipment run more steady, power regulating range 10% 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, regulates advantages such as controlling flexible, 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%, it is ensured that two electric power output voltages are with frequency push-push operation.
Described mold induction heater 4 and two parts up and down that lower mold induction heater 6 is induction heater, wherein mold induction heater 4 can move up and down on request, lower mold 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 lower mold induction heater 6 is heatproof rustless steel, heater outer wall uses the insulation of silicon salt aluminum fiber, to improve the service life of heater, the induction coil of mold induction heater 4 and lower mold induction heater 6 is arranged by being reasonably distributed of magnetic field intensity, ensure that mould uniformly heats, equipped with yoke outside induction coil, in case the heating that leak-stopping magnetic field is to metals such as hydraulic press columns, and improve the electrical efficiency of heating furnace.
In described mold induction heater 4, lower mold induction heater 6, isothermal forging mold 3 and isothermal forging lower mold 5, a point for measuring temperature is respectively set, by Siemens New Type PLC and industrial computer, after arranging parameter according to technological requirement, variable-frequency power sources can automatically control heating-up temperature and programming rate (including pressing process)；The temperature measurement accuracy of heater≤± 10 C, temperature-controlled precision≤± 10 C during stable state at mould；Realizing high-precision intelligent digital display, heating-up temperature can be carried out real time record, trendgram can show in real time；There is the setting of parameter, storage, 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, it is simple 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 during field adjustable, we realize induction heating apparatus to be made and normally work and the adjustment of the induction reactance of the inversion tank circuit, capacitive reactance has the biggest relation.After induction heating apparatus operational factor has been debugged, the upper and lower mould of isothermal forging is heated uniformly to 950 DEG C by technological requirement 4-8 hour and is incubated two hours, isothermal forging mold insulation frequency conversion voltage 550V, isothermal forging lower mold insulation frequency conversion voltage 650V, the upper and lower mould of isothermal forging is incubated at 950 DEG C, error ± 5 DEG C.Isothermal forging upper and lower mould homogeneous heating, induction apparatus shell feel temperature is low, isothermal forging upper and lower mould high insulating effect, shell influence electricity, induction heating apparatus through 26 hours continuously start test equipment stable and reliable in work.In pressing process, upper induction apparatus can rise in charged insulation, but in view of safety factors, 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 induction apparatus, full power a few minutes isothermal forging dies temperature that heats up rises only 950 DEG C of insulations, much smaller than the resistance heater heating-up time.Several pieces of workpiece of pressure testing, isothermal forging upper and lower mould induction heating apparatus complies fully with isothermal forging technological requirement.
φ 900mm-φ 2000mm isothermal forging upper/lower die all solid state variable frequency induction heating means: comprise the steps:
1) planker 7 under removal hydraulic press, installs lower mold induction heater 6 under hydraulic press on planker 7；
2) isothermal forging lower mold 5 is installed in lower mold 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 are raised；
6) under hydraulic press, planker 7, isothermal forging lower mold 5, lower mold 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 lower mold 5 and mold induction heater 4, lower mold induction heater 6 integral to center closed assembly；
8) connecting cooling water, mold induction heater 4 connects 1# all solid state variable frequency induction power supply 8, and lower mold induction heater 6 connects 2# all solid state variable frequency induction power supply 9；
9) isothermal forging mold 3, isothermal forging lower mold 5 heating-up temperature to 950 DEG C are incubated 2 hours；
10) hydraulic press upper die head 1, isothermal forging mold 3 and mold induction heater 4 are raised；
11) the isothermal forging workpiece blank heated；
12) hydraulic press upper die head 1, isothermal forging mold 3 and mold induction heater 4, the mold induction heater 4 that closes, lower mold induction heater 6 and isothermal forging mold 3, isothermal forging lower mold 5 are declined；
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 lower mold 5 and isothermal forging workpiece are warmed up to 950 DEG C；
14) compacting isothermal forging workpiece, whole process is gone round and begun again.
Claims (7)
- null1. φ 900mm-φ 2000mm isothermal forging upper/lower die all solid state variable frequency induction heater，It is characterized in that including hydraulic press upper die head (1)、Hydraulic press column (2)、Isothermal forging mold (3)、Mold induction heater (4)、Isothermal forging lower mold (5)、Lower mold induction heater (6)、Planker (7) under hydraulic press、1# all solid state variable frequency induction power supply (8)、2# all solid state variable frequency induction power supply (9)，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)，Lower mold induction heater (6) is arranged on planker under hydraulic press (7) and above and can move forward and backward and convenient disassembly with planker under hydraulic press (7)，Lower mold induction heater (6) is built with isothermal forging lower mold (5)，Mold induction heater (4) is lifted on hydraulic press upper die head (1) and above and can move up and down，It is easy to hot blank install additional and press forging after isothermal forging takes out，Equipped with isothermal forging mold (3) on hydraulic press upper die head (1)，The power output end of 1# all solid state variable frequency induction power supply (8) connects with the power input of mold induction heater (4)，Heat for mold induction heater (4)，The power output end of 2# all solid state variable frequency induction power supply (9) connects with the power input of lower mold induction heater (6)，Heat for lower mold induction heater (6).
- φ 900mm-φ 2000mm isothermal forging upper/lower die all solid state variable frequency induction heater the most according to claim 1, it is characterized in that described mold induction heater (4) and two parts up and down that lower mold induction heater (6) is induction heater, wherein mold induction heater (4) can move up and down on request, and lower mold induction heater (6) can move forward and backward and convenient disassembly with planker under hydraulic press (7).
- φ 900mm-φ 2000mm isothermal forging upper/lower die all solid state variable frequency induction heater the most according to claim 1, the middle heater that it is characterized in that described mold induction heater (4) and lower mold induction heater (6) is heatproof rustless steel, heater outer wall uses the insulation of silicon salt aluminum fiber, to improve the service life of heater.
- φ 900mm-φ 2000mm isothermal forging upper/lower die all solid state variable frequency induction heater the most according to claim 3, it is characterized in that the induction coil of described mold induction heater (4) and lower mold induction heater (6) is arranged by magnetic field distribution, ensure that mould uniformly heats, equipped with yoke outside induction coil, in case the heating that leak-stopping magnetic field is to hydraulic press column metal, and improve the electrical efficiency of heating furnace.
- φ 900mm-φ 2000mm isothermal forging upper/lower die all solid state variable frequency induction heater the most according to claim 1, it is characterized in that described mold induction heater (4), lower mold induction heater (6), isothermal forging mold (3) and isothermal forging lower mold (5) are upper the most each arranges a point for measuring temperature, by PLC and industrial computer, after according to technological requirement, parameter is set, 1# all solid state variable frequency induction power supply (8) and 2# all solid state variable frequency induction power supply (9) automatically controls heating-up temperature and programming rate to isothermal forging mold (3) and isothermal forging lower mold (5) respectively.
- φ 900mm-φ 2000mm isothermal forging upper/lower die all solid state variable frequency induction heater the most according to claim 3, is characterized in that temperature measurement accuracy≤± 10 C of described heater, temperature-controlled precision≤± 10 C during stable state at mould.
- 7. φ 900mm-φ 2000mm isothermal forging upper/lower die all solid state variable frequency induction heater as claimed in claim 1, is characterized in that the method for work of this heater comprises the steps:1) planker (7) under removal hydraulic press, under hydraulic press, planker (7) is upper installs lower mold induction heater (6)；2) isothermal forging lower mold (5) is installed in lower mold 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) are raised；6) under hydraulic press, planker (7), isothermal forging lower mold (5), lower mold 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 lower mold (5) and mold induction heater (4), lower mold induction heater (6) integral to center closed assembly；8) connecting cooling water, mold induction heater (4) connects 1# all solid state variable frequency induction power supply (8), and lower mold induction heater (6) connects 2# all solid state variable frequency induction power supply (9)；9) isothermal forging mold (3), isothermal forging lower mold (5) heating-up temperature to 950 DEG C are incubated 2 hours；10) hydraulic press upper die head (1), isothermal forging mold (3) and mold induction heater (4) are raised；11) the isothermal forging workpiece blank heated；12) hydraulic press upper die head (1), isothermal forging mold (3) and mold induction heater (4), the mold induction heater (4) that closes, lower mold induction heater (6) and isothermal forging mold (3), isothermal forging lower mold (5) are declined；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 lower mold (5) and isothermal forging workpiece are warmed up to 950 DEG C；14) compacting isothermal forging workpiece, whole process is gone round and begun again.
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| Application Number | Priority Date | Filing Date | Title |
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| 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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| 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 CN104690204A (en) | 2015-06-10 |
| CN104690204B true CN104690204B (en) | 2016-10-19 |
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| 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 |
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| JP2805150B2 (en) * | 1988-10-14 | 1998-09-30 | マツダ株式会社 | Work heating device |
| JPH04210837A (en) * | 1990-12-03 | 1992-07-31 | Seiko Instr Inc | Isothermal forging device |
| CN2608926Y (en) * | 2003-03-07 | 2004-03-31 | 朱兴发 | Magnetic yoke assembly parts in coreless medium frequency conversion induction electric furnace |
| CN1789442A (en) * | 2004-12-15 | 2006-06-21 | 江南机器（集团）有限公司 | Heating method for forging non-ferrous metal pieces |
| CN102218499A (en) * | 2011-05-17 | 2011-10-19 | 陕西宏远航空锻造有限责任公司 | Mould heating furnace for isothermal forging |
| CN203621498U (en) * | 2013-12-26 | 2014-06-04 | 四川大学 | Vacuum induction hot-press thermal distortion device for preparing anisotropy thermal distortion rare-earth permanent magnet |
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