CN203136221U - Uniform heating device for large metal blank - Google Patents
Uniform heating device for large metal blank Download PDFInfo
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- CN203136221U CN203136221U CN 201220682118 CN201220682118U CN203136221U CN 203136221 U CN203136221 U CN 203136221U CN 201220682118 CN201220682118 CN 201220682118 CN 201220682118 U CN201220682118 U CN 201220682118U CN 203136221 U CN203136221 U CN 203136221U
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Abstract
The utility model relates to a uniform heating device for large metal blanks and belongs to the technical field of metal material processing. The device mainly comprises an induction heating mechanism, an air-cooled mechanism and a blank material transferring mechanism, wherein the induction heating mechanism is an electromagnetic induction heating coil placed vertically, the air-cooled mechanism is an air-cooled coil arranged on the periphery of the electromagnetic induction heating coil, and the blank material transferring mechanism is used for conveying metal blanks. The uniform heating device for large metal blanks effectively prevents growing and coarsening of crystal grains during heating, elephant's foot bulging on heated blanks and collapse during conveying and transferring, and facilitates transshipment, butt joint and shaping of the blank material. The uniform heating device satisfies the requirements of rapid and uniformly heating for heating large metal blanks, and facilitates hot moulding of metal materials. Moreover, the uniform heating device is safe for operation, compact in structure, stable for operation and easy for automatic control.
Description
Technical field
The utility model belongs to the metal material processing technical field, specially refers to a kind of device for homogenous heating of large scale metal stock.
Background technology
The technology of shaping of metal material mainly contains forging, casting and emerging semi-solid state forming technique, and the even heating of metal stock is the important step of metal stock hot forming process.Temperature control is inaccurate and the temperature field is inhomogeneous all can affect greatly follow-up forming process, product tissue and performance.So the heating temperature control precision that adds the heat request blank of metal stock is very high, simultaneously, also require the heating of blank will have certain speed, prevent grain growth and alligatoring in the heating process, heating time is unsuitable oversize.Simultaneously in order to satisfy suitability for industrialized production, the metal stock that heating is finished is wanted and can be shifted rapidly and dock, and reduces temperature drop as far as possible and prevents that crystal grain from further growing up.
For heating accuracy and the firing rate that guarantees metal stock, the mode of heating of industrial employing mainly is electromagnetic induction heating, and adopts manipulator that the metal stock that heats is packed into fast and finish post forming in the mould.About the research of the device of metal stock heating and process aspect many; comprise Beijing Non-Ferrous Metal Research General Academy's semi-solid-state metal blank post bake vertical unit (200820108866) and horizontal type device (200810115679); post bake technology (03115916) in a kind of aluminium alloy semi-solid forming technique of Shanghai University's application, this patent is studied multi-thread circle batch (-type) segmentation induction heating technology and is protected.But size and the weight of the heating blank that above-mentioned patent is mentioned are all less, and especially for semi-solid-state shaping, the weight of blank generally is no more than 5kg.In fact the large scale metal stock evenly to add thermal control extremely important to blank structure stability and the continuous production efficiency of industrialization, large scale metal stock control difficulty of heating accuracy in heating process is big, blank is inside and outside, the temperature difference up and down is inhomogeneous, the blank surface heating is inhomogeneous, flow soup easily, heating the later stage simultaneously is easy to generate " resembling foot " phenomenon, and follow-up blank transhipment, butt joint and forming process are brought problems.
The utility model content
The purpose of this utility model provides a kind of device for homogenous heating of large scale metal stock, the utility model is by a large amount of early-stage Study, induction heater structure, air-cooled structure and heating process are optimized design, realized the quick uniformity heating to the large scale metal stock, effect is fairly obvious.The device rate of heat addition of the present utility model is fast, can guarantee to be heated that large scale metal stock internal-external temperature difference is little, the temperature field is even, temperature control is accurate, and the transfer of metal stock is shaped dock with following process and makes things convenient for.
For achieving the above object, the utility model is taked following design:
A kind of device for homogenous heating of large scale metal stock, this device mainly is made up of induction heating mechanism, air-cooled mechanism and blank transshipment acitivity, and induction heating mechanism is electromagnetic induction heating coil, and electromagnetic induction heating coil is vertical placement; Air-cooled mechanism is air-cooled coil, and air-cooled coil is installed on the periphery of electromagnetic induction heating coil, and the blank transshipment acitivity is used for transporting metal stock.
Described blank transshipment acitivity is positioned at the below of electromagnetic induction heating coil, mainly comprises the pneumatic actuation cylinder, realizes the transhipment of blank by moving up and down.
Described blank transshipment acitivity is made up of cylinder, insulating rod, asbestos washer and blank supporting plate, connects by insulating rod between cylinder and the blank supporting plate, and asbestos washer is positioned on the blank supporting plate.
Described air-cooled mechanism by radially removable air-cooled coil, radially fix the air-cooled coil of air-cooled coil and axial restraint and form, each air-cooled coil is controlled the blank surface temperature field.Radially removable air-cooled coil is installed on the middle and upper part of electromagnetic induction heating coil, can move up and down, and radially fixes the bottom that air-cooled coil is installed on electromagnetic induction heating coil, and the air-cooled coil of axial restraint is installed on the bottom of electromagnetic induction heating coil.
The power supply of the electromagnetic induction heating coil of this device can be selected thyristor supply or IGBT power supply or other power supplys, and supply frequency is 200～1500Hz.The size of electromagnetic induction heating coil determines that according to the size of required heating large scale metal stock for the load coil of circle, the induction coil internal diameter is 1.1～1.5 times of blank diameter, and the height of induction coil is 1.5～4 times of blank height.
The heating work platform also is set radially fixing between the air-cooled coil of air-cooled coil and axial restraint, its effect is for installing and Motionless electromagnetic load coil and the air-cooled coil of axial restraint.
Adopt the device for homogenous heating of large scale metal stock of the present utility model evenly to heat the large scale metal stock.These heating means comprise the steps: metal stock is placed on the blank supporting plate that is lined with asbestos washer, and the blank transshipment acitivity pushes blank in the electromagnetic induction heating coil and heats, and opens air-cooled mechanism in the time of heating; After heating was finished, the blank transshipment acitivity shifted out electromagnetic induction heating coil with blank, took out blank, finished the overall process of large scale metal stock heating.
The mode of heating of large scale metal stock adopts the syllogic heating process: high power rapid heat-up stage, middle power temperature equilibrium stage and low-power homogenizing stage, and can be according to the adjusted size syllogic heating process of blank.
High power rapid heat-up stage heating power is 30～50kW, heating time 3～5min; In the heating power of power temperature equilibrium stage be 10～15kW, heating time 4～5min; The heating power of low-power temperature equilibrium stage is 6～8kW, heating time 3～4min.
The subject matter of large scale blank heating is the inhomogeneities of heating, and the surface is local flow's soup easily, and the blank bottom is easy to generate " resembling foot " phenomenon, and at above-mentioned situation, the utility model adopts the air-cooled coil of 3 covers that blank is carried out air-cooled processing.Radially fix air-cooled coil and be primarily aimed at " resembling foot " phenomenon, air-cooled processing is carried out in the bottom of blank.The air that the air-cooled coil of axial restraint accelerates blank surface flows the temperature field of balance blank surface.Radially removable air-cooled coil can carry out air-cooled processing to the blank surface regional area, and anti-fluid stopping soup phenomenon produces.
The blank transshipment acitivity is finished by cylinder, for preventing the sensed heating of transshipment acitivity cylinder, at cylinder upper end assembling insulating rod, finishes the transhipment of blank by moving up and down of cylinder.
The utility model is selected electromagnetic induction heating for use, mode of heating adopts the syllogic heating process, as shown in Figure 4, comprise: high power rapid heat-up stage, middle power temperature equilibrium stage and low-power homogenizing stage, the distribution that this mode of heating can make the heating of blank and temperature field more evenly rationally.
The utility model has the advantages that:
1, with traditional resistance heating mode relatively, the utlity model has efficiency of heating surface height, required time is short, avoids large scale blank (the diameter range φ 120～200mm of large scale metal stock, the grain growth in weight range 5～20kg) heating processes and alligatoring etc.
2, the syllogic heating process of the utility model employing can make the inside and outside temperature difference of large scale blank littler, and the distribution of blank temperature field is more even, and this is to follow-up transhipment and be shaped very favourable.
3, the utility model utilizes air-cooled coil that blank surface is carried out air-cooled processing, and the metal stock surface temperature reduces rapidly, has avoided blank surface stream soup and the generation of " resembling foot " phenomenon in the heating process, is fit to the rapid and uniform heating of large scale blank.
4, the utility model adopts many power of unicoil heating means, does not need the complicated mechanical transmission mechanism, and simple and compact equipment structure has handling safety, advantage such as stable.
Description of drawings
Fig. 1 is the utility model large scale metal stock device for homogenous heating schematic diagram.
Fig. 2 is the A-A direction schematic diagram that the utility model is used large scale metal stock device for homogenous heating schematic diagram.
Fig. 3 is the utility model large scale metal stock device for homogenous heating blank heating stage schematic diagram.
Fig. 4 is that the utility model carries out syllogic heating process schematic diagram with large scale metal stock device for homogenous heating.
Main Reference numeral:
1 radially removable air-cooled coil 2 electromagnetic induction heating coils
3 radially fix air-cooled coil 4 heating work platforms
Air-cooled coil 6 metal stocks of 5 axial restraints
7 asbestos washers, 8 blank supporting plates
9 insulating rods, 10 cylinders
Embodiment
Be large scale metal stock device for homogenous heating as Figure 1-3, this device mainly is made up of induction heating mechanism, blank transshipment acitivity and air-cooled mechanism.Induction heating mechanism is single electromagnetic induction heating coil 2, and electromagnetic induction heating coil 2 is vertical placement; Air-cooled mechanism is air-cooled coil, and air-cooled coil is installed on the periphery of electromagnetic induction heating coil, and the blank transshipment acitivity is used for transporting metal stock 6.
The blank transshipment acitivity is positioned at the below of electromagnetic induction heating coil 2, mainly comprises the pneumatic actuation cylinder, realizes the transhipment of blank by moving up and down.The blank carrier mechanism is finished by cylinder 10, for preventing the 10 sensed heating of transshipment acitivity cylinder, at cylinder 10 upper ends assembling insulating rod 9, finishes the transhipment of blank by moving up and down of cylinder 10.
The blank transshipment acitivity specifically is made up of cylinder 10, insulating rod 9, asbestos washer 7 and blank supporting plate 8, connects by insulating rod 9 between cylinder 10 and the blank supporting plate 8, and asbestos washer 7 is positioned on the blank supporting plate 8.
Air-cooled mechanism by radially removable air-cooled coil 1, radially fix the air-cooled coil 5 of air-cooled coil 3 and axial restraint and form, each air-cooled coil is controlled the blank surface temperature field.Radially removable air-cooled coil 1 is installed on the top of electromagnetic induction heating coil 2, can move up and down, and radially fixes the middle and lower part that air-cooled coil 3 is installed on electromagnetic induction heating coil 2, and the air-cooled coil 5 of axial restraint is installed on the bottom of electromagnetic induction heating coil 2.
The subject matter of large scale blank heating is the inhomogeneities of heating, and the surface is local flow's soup easily, and the blank bottom is easy to generate " resembling foot " phenomenon, and at above-mentioned situation, the utility model adopts the air-cooled coil of 3 covers that blank is carried out air-cooled processing.Radially fix air-cooled coil 3 and be primarily aimed at " resembling foot " phenomenon, air-cooled processing is carried out in the bottom of blank.The air that the air-cooled coil 5 of axial restraint accelerates blank surface flows the temperature field of balance blank surface.Radially removable air-cooled coil 1 can carry out air-cooled processing to the blank surface regional area, and anti-fluid stopping soup phenomenon produces.
The power supply of electromagnetic induction heating coil 2 can be selected thyristor supply or IGBT power supply or other power supplys, and supply frequency is 200～1500Hz.The size of electromagnetic induction heating coil 2 determines that according to the size of required heating large scale metal stock for the load coil of circle, the induction coil internal diameter is 1.1～1.5 times of blank diameter, and the height of induction coil is 1.5～4 times of blank height.
Also heating work platform 4 can be installed radially fixing between the air-cooled coil 5 of air-cooled coil 3 and axial restraint, its effect is: be used for installing and Motionless electromagnetic load coil 2 and the air-cooled coil 5 of axial restraint.
The method that adopts said apparatus to carry out the even heating of large scale metal stock, comprise: metal stock 6 is placed on the blank supporting plate 8 that is lined with asbestos washer 7, the blank transshipment acitivity pushes blank in the electromagnetic induction heating coil 2 and heats, and opens air-cooled mechanism in the time of heating; After heating was finished, the blank transshipment acitivity shifted out electromagnetic induction heating coil 2 with blank, took out blank, finished the overall process of large scale metal stock heating.
The electromagnetic induction heating of the utility model large scale metal stock is selected the syllogic heating process for use, as shown in Figure 4, be high power rapid heat-up stage, middle power temperature equilibrium stage and low-power homogenizing stage, can be according to the adjusted size syllogic heating process of blank, the distribution that this mode of heating can make the heating of blank and temperature field is more evenly rationally.
High power rapid heat-up stage heating power is 30～50kW, heating time 3～5min; In the heating power of power temperature equilibrium stage be 10～15kW, heating time 4～5min; The heating power of low-power temperature equilibrium stage is 6～8kW, heating time 3～4min.
As shown in Figure 1 be the device for homogenous heating of large scale metal stock, this device mainly is made up of induction heating mechanism, blank transshipment acitivity and air-cooled mechanism three parts.Induction heating mechanism is made up of single load coil 2, and load coil is vertical placement, and heater coil adopts the square copper pipe coiling of 15 * 15mm to form, interior logical cooling water, and internal coil diameter 280mm, coil height is 380mm.Induction heating power adopts IGBT power supply, supply frequency 1000Hz.
Transshipment acitivity is made up of cylinder 10, insulating rod 9, blank supporting plate 8 and asbestos washer 7, and blank is placed on the blank supporting plate 8 that is lined with asbestos washer 7, and mainly the mode of moving up and down by cylinder 10 drives.
Air-cooled structure mainly by radially removable air-cooled coil 1, radially fix the air-cooled coil 5 of air-cooled coil 3 and axial restraint and form.Radially fix air-cooled coil 3 and be primarily aimed at " resembling foot " phenomenon, air-cooled processing is carried out in the bottom of blank.The air that the air-cooled coil 5 of axial restraint accelerates blank surface flows the temperature field of balance blank surface.Radially removable air-cooled coil 1 can carry out air-cooled processing to the blank surface regional area, and anti-fluid stopping soup phenomenon produces.
Before beginning heating, cylinder 10 places the downstream position place, as shown in Figure 2, the A356 aluminum alloy blank of well cutting is placed on the blank supporting plate 8 that is lined with asbestos washer 7, and the A356 aluminum alloy blank is of a size of Φ 200 * 240mm.Transshipment acitivity cylinder 10 goes upward to heating location, the A356 aluminum alloy blank is pushed in the load coil 2 heat, as shown in Figure 3.This moment adopt the syllogic heating process of Fig. 4 that blank is heated, high power rapid heat-up stage heating power is 30～40kW, heating time 3～5min; Open 3 groups of air-cooled coils of air-cooled mechanism in the time of heating; In the heating power of power temperature equilibrium stage be 10～12kW, heating time 4～5min; The heating power of low-power temperature equilibrium stage is 6～8kW, heating time 3min.Among Fig. 4, I is the high power rapid heat-up stage, and II is middle power temperature equilibrium stage, and III is the low-power homogenizing stage, and curve 1 is blank central temperature curve, and curve 2 is blank 1/2 radius temperature curve.
After phase III, the homogenizing heating was finished, transshipment acitivity cylinder 10 is descending from upward position, take out the A356 alloy blank, finish the overall process of large scale metal stock heating.The final temperature of blank reaches 580 ℃, and the temperature difference of central temperature and 1/2 radius is 2 ℃, and the temperature field is comparatively even, can realize heating and the post forming of large scale A356 aluminum alloy blank.
As shown in Figure 1 be the device for homogenous heating of large scale metal stock, this device mainly is made up of induction heating mechanism, blank transshipment acitivity and air-cooled mechanism three parts.Induction heating mechanism is made up of single load coil 2, and load coil is vertical placement, and heater coil adopts the square copper pipe coiling of 15 * 15mm to form, interior logical cooling water, and internal coil diameter 350mm, coil height is 400mm.Induction heating power adopts thyristor supply, supply frequency 1000Hz.
Transshipment acitivity is made up of cylinder 10, insulating rod 9, blank supporting plate 8 and asbestos washer 7, and blank is placed on the blank supporting plate 8 that is lined with asbestos washer 7, and mainly the mode of moving up and down by cylinder 10 drives.
Air-cooled structure mainly by radially removable air-cooled coil 1, radially fix the air-cooled coil 5 of air-cooled coil 3 and axial restraint and form.Radially fix air-cooled coil 3 and be primarily aimed at " resembling foot " phenomenon, air-cooled processing is carried out in the bottom of blank.The air that the air-cooled coil 5 of axial restraint accelerates blank surface flows the temperature field of balance blank surface.Radially removable air-cooled coil 1 can carry out air-cooled processing to the blank surface regional area, and anti-fluid stopping soup phenomenon produces.
Before beginning heating, cylinder 10 places the downstream position place, as shown in Figure 2,6061 aluminum alloy blanks of well cutting is placed on the blank supporting plate 8 that is lined with asbestos washer 7, and 6061 aluminum alloy blanks are of a size of Φ 250 * 300mm.Transshipment acitivity cylinder 10 goes upward to heating location, 6061 aluminum alloy blanks is pushed in the load coil 2 heat, as shown in Figure 3.This moment adopt the syllogic heating process of Fig. 4 that blank is heated, high power rapid heat-up stage heating power is 35～45kW, heating time 3～5min; Heating the time is opened 3 groups of air-cooled coils of air-cooled mechanism, and the heating power of middle power temperature equilibrium stage is 12～14kW, heating time 4～5min; The heating power of low-power temperature equilibrium stage is 6～8kW, heating time 3～4min.
After phase III, the homogenizing heating was finished, transshipment acitivity cylinder 10 is descending from upward position, take out 6061 alloy blanks, finish the overall process of large scale metal stock heating.The final temperature of 6061 blanks reaches 540 ℃, and the temperature difference of central temperature and 1/2 radius is 3 ℃, and the temperature field is comparatively even, can realize even heating and the follow-up forging and molding of large scale 6061 aluminum alloy blanks.
The utility model device is the rapid and uniform heating device of large scale metal stock, and single load coil is vertical placement, and the size of coil designs processing according to billet size.The blank transshipment acitivity can come and go by cylinder and finish.The mode of heating of blank adopts the syllogic heating means of high power Fast Heating, middle power temperature balance and low-power homogenizing, by 3 groups of air-cooled coils the temperature field of blank surface is controlled, and reaches the purpose of rapid and uniform heating large scale metal stock.
The utility model device is fit to the rapid and uniform heating of large-sized metal stock, can avoid growing up and alligatoring of crystal grain in the heating process, prevent from heating the later stage blank and form " resembling foot " and transport in the transfer process and can cave in, be conducive to transhipment, butt joint and the shaping of blank.Can satisfy the large scale metal stock not only the needs heating rapidly but also require the uniform requirement of temperature be applicable to the hot forming of metal material, have simultaneously handling safety, compact conformation, stable, be easy to the advantage of control automatically.
Claims (7)
1. the device for homogenous heating of a large scale metal stock, it is characterized in that: mainly be made up of induction heating mechanism, air-cooled mechanism and blank transshipment acitivity, induction heating mechanism is electromagnetic induction heating coil, and electromagnetic induction heating coil is vertical placement; Air-cooled mechanism is air-cooled coil, and air-cooled coil is installed on the periphery of electromagnetic induction heating coil, and the blank transshipment acitivity is used for transporting metal stock.
2. the device for homogenous heating of large scale metal stock according to claim 1, it is characterized in that: described blank transshipment acitivity is made up of cylinder, insulating rod, asbestos washer and blank supporting plate, connect by insulating rod between cylinder and the blank supporting plate, asbestos washer is positioned on the blank supporting plate.
3. the device for homogenous heating of large scale metal stock according to claim 1 is characterized in that: described air-cooled mechanism by radially removable air-cooled coil, radially fix the air-cooled coil of air-cooled coil and axial restraint and form.
4. the device for homogenous heating of large scale metal stock according to claim 3, it is characterized in that: described radially removable air-cooled coil is installed on the middle and upper part of electromagnetic induction heating coil, can move up and down, describedly radially fix the bottom that air-cooled coil is installed on electromagnetic induction heating coil, the air-cooled coil of described axial restraint is installed on the bottom of electromagnetic induction heating coil.
5. the device for homogenous heating of large scale metal stock according to claim 4, it is characterized in that: the power supply of described electromagnetic induction heating coil is thyristor supply or IGBT power supply, and supply frequency is 200～1500Hz.
6. the device for homogenous heating of large scale metal stock according to claim 5, it is characterized in that: described electromagnetic induction heating coil is for circular, the internal diameter of described electromagnetic induction heating coil is 1.1～1.5 times of blank diameter, highly is 1.5～4 times of blank height.
7. the device for homogenous heating of large scale metal stock according to claim 3, it is characterized in that: described radially fixing between air-cooled coil and the air-cooled coil of axial restraint also arranges the heating work platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220682118 CN203136221U (en) | 2012-12-11 | 2012-12-11 | Uniform heating device for large metal blank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220682118 CN203136221U (en) | 2012-12-11 | 2012-12-11 | Uniform heating device for large metal blank |
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| CN203136221U true CN203136221U (en) | 2013-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220682118 Withdrawn - After Issue CN203136221U (en) | 2012-12-11 | 2012-12-11 | Uniform heating device for large metal blank |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103428928A (en) * | 2012-12-11 | 2013-12-04 | 北京有色金属研究总院 | Uniform heating apparatus and method for large-sized metal blank |
| CN108141926A (en) * | 2015-09-25 | 2018-06-08 | 康讯公司 | It is preheated for the large-scale blank electric induction of heat processing technique |
-
2012
- 2012-12-11 CN CN 201220682118 patent/CN203136221U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103428928A (en) * | 2012-12-11 | 2013-12-04 | 北京有色金属研究总院 | Uniform heating apparatus and method for large-sized metal blank |
| CN103428928B (en) * | 2012-12-11 | 2015-08-19 | 北京有色金属研究总院 | A kind of device for homogenous heating of large scale metal stock and method |
| CN108141926A (en) * | 2015-09-25 | 2018-06-08 | 康讯公司 | It is preheated for the large-scale blank electric induction of heat processing technique |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130814 Effective date of abandoning: 20150819 |
|
| RGAV | Abandon patent right to avoid regrant |