CN103822471B - Alternating-current high-power vacuum hot pressing sintering furnace - Google Patents
Alternating-current high-power vacuum hot pressing sintering furnace Download PDFInfo
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- CN103822471B CN103822471B CN201410090403.XA CN201410090403A CN103822471B CN 103822471 B CN103822471 B CN 103822471B CN 201410090403 A CN201410090403 A CN 201410090403A CN 103822471 B CN103822471 B CN 103822471B
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Abstract
The invention relates to a vacuum hot pressing sintering furnace using an alternating current power supply. The sintering furnace comprises a furnace body and two inlet electrodes and is characterized in that one end of the furnace body is provided with an inlet electrode mounting hole in which the two inlet electrodes and fixing devices thereof are arranged, wherein each fixing device consists of an inlet electrode fixing plate, an inlet electrode sealing plate, a fixing plate seal ring, an inlet electrode seal ring, a fixing plate connecting bolt and a sealing plate connecting bolt. By adopting the sintering furnace provided by the invention, the sealing performance is improved, the service life of the inlet electrode sealing parts is long, and electric energy can be saved.
Description
Technical field
The present invention relates to the agglomerating plant processing furnace charge in a vacuum, be specifically related to the vacuum sintering funace using AC power.
Background technology
Existing vacuum sintering funace, is divided into horizontal and vertical two kinds by the mounting means of body of heater; Divide for by pressurization unidirectional above or below body of heater and the Bidirectional-pressure two kinds that pressurizeed by body of heater upper and lower simultaneously by pressuring method; Enter the electrode mode introduced in body of heater by two pieces to be divided into two pieces to enter electrode introducing from the both sides up and down of body of heater, the left and right sides and rear and front end respectively, and two pieces are entered electrode from several modes such as one end introducings of body of heater; Direct current supply and Alternating Current Power Supply two kinds is divided into by use power supply type; Eddy-current heating and resistance heated two kinds is divided into by mode of heating.Wherein, although resistance heating manner can use direct current supply, but because two pieces are entered the shunt circuit that mould between electrode and powder body material are quite series at resistance between two graphite pressure heads and electric capacity, therefore, in order to increase electric current, improve power output, most of high-power resistance heated type vacuum sintering funace still all adopts ac power supply.
In recent years, along with the development of vacuum hot pressing sintering technique, can the appearance and size of processing work increasing, the power consumed also increases thereupon.Such as, when the power consumed is 200Kw, adopt the safe voltage of below 36V to power, the electric current flow through into electrode is then greater than 5000A.The present inventor finds in real work, for powerful vacuum hot-pressed sintering furnace, when two pieces enter electrode introduce from one end of body of heater time, if employing ac power supply, two pieces of sintering furnace body heatings of entering between electrode are serious, two blocks of encapsulants entering surrounding them are caused to soften and leak gas, even if adopt high temperature-resistant polymer encapsulant, because its aging speed is accelerated also to have a strong impact on service life.
Produce the principle of eddy current effect for the ease of the existing vacuum sintering funace of public understanding, briefly explain as follows below in conjunction with Figure of description 7 and 8:
The body of heater of vacuum sintering funace adopts austenite (A) type stainless steel, austenite-ferrite (A-F) type two phase stainless steel, ferrite (F) type stainless steel or martensite (M) type stainless steel to manufacture usually, wherein, rear three kinds of equal magnetic conductions of stainless steel, austenite (A) type stainless steel in theory can not magnetic conduction, but the phenomenon of magnetic conduction in actual use, also can be produced because of the problem such as processing technology, service condition.Therefore, when two pieces enter electrode to introduce from one end of body of heater and to adopt Alternating Current Power Supply time, two pieces are entered interelectrode body of heater and will produce vortex flow.
See Fig. 7 and Fig. 8, suppose, within certain cycle, to enter the electric current I in electrode A
aflow from bottom to top, enter the electric current I in electrode B
bwhen flowing from top to bottom, from right-hand screw rule, electric current I
aentering the rotating excitation field producing in the body of heater around electrode A and rotate clockwise, electric current I
bentering the rotating excitation field producing in the body of heater around electrode B and rotate counterclockwise.As can be seen here, entering the outside of electrode A and B, to cancel out each other mutually (see figure 7) on the contrary because of direction of rotation in two magnetic fields, and two magnetic fields are being entered between electrode A and B to superpose, and therefore can determine the vortex flow into producing between electrode A and B as shown in Figure 8 by Lenz's law.Under the environment using super-large current, vortex flow can be very powerful.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of alternating current large-power vacuum sintering funace, this sintering furnace not only good airproof performance, and the use mission entering electrode potted component is long, and can save electric energy.
Technical scheme of the present invention is as described below:
A kind of alternating current large-power vacuum sintering funace, this sintering furnace comprise body of heater and two pieces enter electrode, it is characterized in that,
One of described body of heater is provided with into electrode mounting hole, be provided with two pieces in this installing hole and enter electrode and fixture thereof, wherein said fixture by entering electrode fixed head, enter electrode sealing plate, fixed head sealing ring, enter electrode sealing ring, fixed head connecting bolt and sealing plate connecting bolt and form, wherein
Described enter electrode fixed head cover described in enter the outside of electrode mounting hole and be fixed on body of heater by fixed head connecting bolt; The described middle part entering electrode fixed head is provided with two electrode introduction holes, and described fixed head sealing ring is located at between electrode fixed head and the body of heater entering around electrode mounting hole;
Described two pieces are entered electrode and penetrate in body of heater in set electrode introduction hole from entering electrode fixed head respectively;
Described enter electrode sealing plate and be sleeved on two pieces and enter on electrode and to be fixed on on electrode fixed head by sealing plate connecting bolt; Described electrode introduction hole is being leaned on into one of electrode sealing plate to surrounding expansion formation one seal groove, and the described electrode sealing ring that enters is located in sealing groove;
Described entering electrode fixed head and enter electrode sealing plate is non-magnetic heat-resistant insulating board.
In such scheme, described non-magnetic heat-resistant insulating board can be epoxy resin board, polyfluortetraethylene plate or electrician's plate.
In such scheme, described fixed head sealing ring and to enter electrode sealing ring can be one in copper sealing gasket, polytetrafluoroethylene sealing gasket and O shape rubber seal respectively.
The electrode mounting hole that enters in sintering furnace of the present invention enters electrode for introducing in the lump and installing two pieces, and therefore its shape is without any restriction.But because the described cross section entering electrode is generally rectangle, the therefore preferred rectangular opening of electrode mounting hole of the present invention, so that ensure into electrode outer surface to entering the inner surface of electrode mounting hole apart from equal.
In sintering furnace of the present invention to enter electrode sealing plate number can be one piece, also can be two pieces, but because power is large, flow through the described electric current entering electrode also relatively large, therefore in order to increase two pieces of distances entered between electrode, avoid kindred effect, described enters electrode sealing plate number preferably two pieces, to save material.
In order to improve sealing effectiveness further, the sealing gasket be equipped with between ailhead in body of heater of the fixed head connecting bolt in sintering furnace of the present invention and sealing plate connecting bolt and body of heater.
Alternating current large-power vacuum sintering funace of the present invention adopts following technical measures, namely be provided with into electrode mounting hole at one of body of heater, and two pieces are entered electrode and enter to introduce in electrode introduction hole from described in the lump, and enter electrode fixed head and enter electrode sealing plate to be non-magnetic heat-resistant insulating board, thus abandoned the magnetic circuit that two pieces are entered to produce between electrode magnetic field intensity superposition, effectively avoid producing high temperature because of eddy current effect.Therefore, sintering furnace of the present invention not only sealing property is improved, and enters the long service life of electrode potted component, and can save the electric energy that eddy current consumes.
Accompanying drawing explanation
Fig. 1 and Fig. 2 is the structural representation of a specific embodiment of alternating current large-power vacuum sintering funace of the present invention, and wherein, Fig. 1 is front view, and Fig. 2 is left view; Dotted line in figure represents graphite pressure head and mould.
Fig. 3 and Fig. 4 is for entering the partial structurtes schematic diagram (amplification) of electrode fixing device in sintering furnace shown in Fig. 1 and Fig. 2, wherein, Fig. 3 is front view, and Fig. 4 is the A-A sectional view of Fig. 3.
Fig. 5 and Fig. 6 is the structural representation entering electrode fixing device in another specific embodiment of alternating current large-power vacuum sintering funace of the present invention, and wherein, Fig. 5 is front view, and Fig. 6 is the B-B sectional view of Fig. 5.
Fig. 7 and Fig. 8 is the principal diagram intention that existing vacuum sintering funace produces eddy current effect, and wherein, Fig. 7 is front view, and Fig. 8 is the C-C sectional view of Fig. 7.
Detailed description of the invention
Embodiment 1
See Fig. 1 and Fig. 2, the sintering furnace of this example comprises the cylindric body of heater 1 supported by base 9, two pieces are entered electrode 4 left end passed through into electrode fixing device 14 from body of heater 1 and introduce in body of heater, wherein, upper one piece enter electrode 4 through upper one piece of transition electrode 10 be fixedly connected on being connected at upper one piece of thermode 11 on piston rod 12 end face that to put in via body of heater 1 in body of heater, under another block enter electrode 4 through under another block transition electrode 10 be fixedly connected on bearing 13 under another block thermode 11 be connected.See Fig. 1, electrode 4 is entered at upper one piece, a series circuit is formed at upper one piece of transition electrode 10 with at upper one piece of thermode 11, under another block enter electrode 4, under another block transition electrode 10 and under another block thermode 11 form another series circuit, two series circuits are through being located at the graphite pressure head below be located at one piece of thermode 11 between two thermodes 11, the powder material of another graphite pressure head above another block thermode 11 under being located at and the mould between described two graphite pressure heads and inside thereof forms the resistance-type heater circuit of sintering furnace.
See Fig. 3 and Fig. 4, above-mentioned enter electrode fixing device 14 by entering electrode fixed head 2, enter electrode sealing plate 3, fixed head sealing ring 6, enter electrode sealing ring 5, fixed head connecting bolt 8 and sealing plate connecting bolt 7 and form.Wherein,
Enter electrode fixed head 2 cover the outside entering electrode mounting hole of rectangle set on body of heater 1 and be fixed on body of heater 1 by fixed head connecting bolt 8; Along entering around electrode mounting hole to be provided with seal groove on body of heater 1 lateral surface, fixed head sealing ring 6 to be placed in described seal groove and to be pressed on the lateral surface of body of heater 1 by entering electrode fixed head 2; Wherein, enter electrode fixed head 2 for rectangle epoxy resin board, in the middle part of it, be provided with two electrode introduction holes;
The copper bar of two pieces are entered electrode 4 to be cross sections be rectangle, penetrates in body of heater 1 two rectangular electrode introduction holes set in the middle part of electrode fixed head 2 from entering respectively;
The quantity entering electrode sealing plate 3 is two pieces, and the middle part of each block is provided with a rectangular opening; Each block is entered electrode sealing plate 3 and is sleeved on on electrode 4 by described rectangular opening, and is fixed on on electrode fixed head 2 by sealing plate connecting bolt 7; To enter on electrode fixed head 2 set electrode introduction hole leaning on into one of electrode sealing plate 3 to surrounding expansion formation one seal groove, enter electrode sealing ring 5 and to be located in sealing groove and to be compressed by electrode sealing plate 3; Wherein two pieces are entered the epoxy resin board that electrode sealing plate 3 is rectangle.
See Fig. 3 and Fig. 4, between ailhead in body of heater 1 of fixed head connecting bolt 8 and sealing plate connecting bolt 7 and body of heater 1, be equipped with sealing gasket.
Embodiment 2
See Fig. 5 and Fig. 6, this example is with the difference of embodiment 1:
1, entering electrode sealing plate 3 is one piece, is provided with and the shape of described electrode introduction hole, two rectangular openings that size is identical in the middle part of it in the corresponding position entering on electrode fixed head 2 two set electrode introduction holes; This enters electrode sealing plate 3 and is sleeved on two by described two rectangular openings and enters on electrode 4.
2, enter electrode fixed head 2 and enter electrode sealing plate 3 and be polyfluortetraethylene plate.
The present embodiment other structure other than the above is all identical with embodiment 1.
Claims (4)
1. an alternating current large-power vacuum sintering funace, this sintering furnace comprise body of heater and two pieces enter electrode, it is characterized in that,
One of described body of heater is provided with into electrode mounting hole, be provided with described two pieces in this installing hole and enter electrode and fixture thereof, wherein said fixture by entering electrode fixed head, enter electrode sealing plate, fixed head sealing ring, enter electrode sealing ring, fixed head connecting bolt and sealing plate connecting bolt and form, wherein
Described enter electrode fixed head cover described in enter the outside of electrode mounting hole and be fixed on body of heater by fixed head connecting bolt; The described middle part entering electrode fixed head is provided with two electrode introduction holes, and described fixed head sealing ring is located at between electrode fixed head and the body of heater entering around electrode mounting hole;
Described two pieces are entered electrode and penetrate in body of heater in set electrode introduction hole from entering electrode fixed head respectively;
Described enter electrode sealing plate and be sleeved on two pieces and enter on electrode and to be fixed on on electrode fixed head by sealing plate connecting bolt; Described electrode introduction hole is being leaned on into one of electrode sealing plate to surrounding expansion formation one seal groove, and the described electrode sealing ring that enters is located in sealing groove;
Described entering electrode fixed head and enter electrode sealing plate is non-magnetic heat-resistant insulating board.
2. a kind of alternating current large-power vacuum sintering funace as claimed in claim 1, is characterized in that, the described electrode mounting hole that enters is rectangular opening.
3. a kind of alternating current large-power vacuum sintering funace as claimed in claim 1 or 2, is characterized in that, the described electrode sealing plate that enters is two pieces.
4. a kind of alternating current large-power vacuum sintering funace as claimed in claim 3, is characterized in that, described non-magnetic heat-resistant insulating board is epoxy resin board, polyfluortetraethylene plate or electrician's plate.
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| CN201410090403.XA CN103822471B (en) | 2014-03-12 | 2014-03-12 | Alternating-current high-power vacuum hot pressing sintering furnace |
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| CN201410090403.XA CN103822471B (en) | 2014-03-12 | 2014-03-12 | Alternating-current high-power vacuum hot pressing sintering furnace |
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| CN103822471B true CN103822471B (en) | 2015-05-27 |
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| CN105200517A (en) * | 2015-10-29 | 2015-12-30 | 江苏美科硅能源有限公司 | Heightening device for increasing feeding amount of polycrystal furnace |
| CN108692564A (en) * | 2018-07-17 | 2018-10-23 | 浙江晨华科技有限公司 | A kind of pulse-pressure sintering furnace |
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| JP2002167605A (en) * | 2000-11-29 | 2002-06-11 | Sumitomo Heavy Ind Ltd | Electric pressure sintering apparatus |
| CN101586909B (en) * | 2009-06-26 | 2011-03-30 | 郑州金海威科技实业有限公司 | Hot-pressing sintering machine electrode plate device with cooling trough on electrode plate |
| CN102374772B (en) * | 2010-08-06 | 2013-12-25 | 邓湘凌 | Bidirectional hot-pressing high-temperature sintering furnace and working method thereof |
| CN203744704U (en) * | 2014-03-12 | 2014-07-30 | 安徽金泰尔合金新材料有限公司 | Alternating-current high-power vacuum hot pressing sintering furnace |
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Owner name: WU XUANCHENG Free format text: FORMER OWNER: ANHUI KINGTIER NEW MATERIAL MANUFACTURING CO., LTD. Effective date: 20150216 |
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Effective date of registration: 20150216 Address after: 242000 Anhui city of Xuancheng Province Economic and Technological Development Zone of Xuancheng stone bridge (Group Feicai company) Applicant after: Wu Xuancheng Address before: 242000 Anhui city of Xuancheng Province Economic and Technological Development Zone of Xuancheng stone bridge (Group Feicai company) Applicant before: ANHUI KINGTIER NEW ALLOY MATERIAL CO,. LTD. |
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Effective date of registration: 20171207 Address after: One of the 528000 in Guangdong province Foshan City Danzao Town Nanhai District Nansha village three industrial zone Chen Junjin building Patentee after: Foshan Jin Xin new Mstar Technology Ltd Address before: 242000 Anhui city of Xuancheng Province Economic and Technological Development Zone of Xuancheng stone bridge (Group Feicai company) Patentee before: Wu Xuancheng |
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Address after: One of the 528000 in Guangdong province Foshan City Danzao Town Nanhai District Nansha village three industrial zone Chen Junjin building Patentee after: Guangdong Jin Xin new materials Co., Ltd. Address before: One of the 528000 in Guangdong province Foshan City Danzao Town Nanhai District Nansha village three industrial zone Chen Junjin building Patentee before: Foshan Jin Xin new Mstar Technology Ltd |