CN100456896C - Direct-electrifying heating device - Google Patents
Direct-electrifying heating device Download PDFInfo
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- CN100456896C CN100456896C CNB2004100529187A CN200410052918A CN100456896C CN 100456896 C CN100456896 C CN 100456896C CN B2004100529187 A CNB2004100529187 A CN B2004100529187A CN 200410052918 A CN200410052918 A CN 200410052918A CN 100456896 C CN100456896 C CN 100456896C
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- powered electrode
- tooth
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- electrification
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 9
- 238000009413 insulation Methods 0.000 claims abstract description 7
- 239000004020 conductor Substances 0.000 claims description 44
- 238000001816 cooling Methods 0.000 claims description 18
- 238000005485 electric heating Methods 0.000 claims description 15
- 230000006698 induction Effects 0.000 claims description 3
- 238000002788 crimping Methods 0.000 claims description 2
- 238000010791 quenching Methods 0.000 abstract description 18
- 230000000171 quenching effect Effects 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000000498 cooling water Substances 0.000 description 15
- 238000004804 winding Methods 0.000 description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 230000009931 harmful effect Effects 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 239000000047 product Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Control Of Resistance Heating (AREA)
Abstract
The present invention relates to a direct electrification heating device which comprises a pair of electrification electrodes and a pair of conductive bodies, wherein the electrification electrodes are oppositely arranged according to a certain interval; the conductive bodies are arranged along the opposite direction of the electrification electrodes, electrically connected with the electrification electrodes and simultaneously plays a role in support of the electrification electrodes; the conductive bodies are pressed and fixed by an insulation plate; a binding post is arranged in the extension position of the approximately middle position of the opposite direction and the direction which is approximately orthogonal with the opposite direction; a power supply having a certain frequency is connected to the binding post. The present invention solves the technical problems that the electrification current value of each contact electrode generates unbalance and instable high-precision quenching quality because the lengths of the first and the second conductive bodies connected with the contact electrodes become different; the arrangement area of the electrodes is enlarged and the structure of a quenching line is easy to restrict because the branching conductive bodies are arranged around the contact electrodes by means of the structure in the prior art. The present invention can be matched with various production lines, and the universality of the device is enhanced.
Description
Technical field:
The present invention relates to electric heater unit, particularly a kind of with the direct electric heating device of high-frequency current feeding to operations such as workpiece quench.
Background technology:
In the past, as this direct electric heating device, for example in patent documentation (Te Kaiping: put down into the 10-183234 communique), announced.This direct electric heating device (quenching unit), between first conductor and second conductor by the insulating material unit of being combined into conductor, and, in configuration first contact electrode and second contact electrode etc., diverged since first conductor,, and oppositely be provided with along vertical maintenance gap of the flank of tooth of pairing tooth bar, the other end along second conductor of the unit conductor of above-mentioned longitudinal extension is provided with a pair of fork conductor etc.
Yet, for this heater, owing between first conductor and second conductor that the rightabout and the same direction of the contact electrode that is provided with are in opposite directions extended, be provided with the fork conductor, even workpiece and contact electrode are in contactless state, to flow into fork from the next electric current of high frequency electric source and lead.In order to prevent that between workpiece and contact electrode spark from producing, the fork conductor be configured or roughly be a mouthful word shape from the plane, surrounded around first conductor and second conductor, rightabout from contact electrode, by first conductor and second conductor, high-frequency current is offered contact electrode.
Therefore, first conductor that links to each other with contact electrode and the length of second conductor dissimilate, provide from its approximate midpoint position high-frequency current to a pair of contact electrode relatively difficulty, produced uneven, high accuracy quenching quality for the electrical current value of each contact electrode and can not get stable the time, contact electrode around since the fork conductor setting, the area that is provided with of electrode part is increased, the structure of quenching line also is restricted easily, and image heating is provided with the problem of versatility variation.
Summary of the invention:
Purpose of the present invention just provides and a kind ofly can improve the direct electric heating device that device is provided with versatility, mainly solving first conductor that links to each other with contact electrode in the prior art and the length of second conductor dissimilates, having produced uneven, high accuracy quenching quality for the electrical current value of each contact electrode can not get stable the time, contact electrode around since the fork conductor setting, make the area that is provided with of electrode part increase the technical problem that the structure of quenching line also is restricted easily.
For solving the problems of the technologies described above, the present invention is achieved in that
A kind of direct electric heating device comprises at regular intervals a pair of powered electrode of configuration in opposite directions, and, relative direction configuration along this powered electrode links to each other on electric with this powered electrode, simultaneously this powered electrode has been played the pair of conductors of supporting role, it is characterized in that
Described pair of conductors is fixed with the insulation board crimping, simultaneously, from the roughly middle part of described relative direction, with relative direction roughly the direction extended spot of quadrature be provided with binding post, connected the power supply of certain frequency on this binding post.
Described power supply has the output transformer of binding post to be electrically connected with described conductor, has connected a safety coil in parallel with powered electrode on the output of this output transformer.
The electrical characteristic value of described safety coil is set to: when powered electrode contacts with workpiece, and the electrical characteristic between powered electrode is worth corresponding certain value.
Between the described powered electrode, be provided with the cooling collar of the tooth bar flank of tooth that is used for cooling off the workpiece after the heating, this cooling collar is provided with a plurality of spray-holes along flank of tooth tooth peak portion.
Compared with prior art, technique effect of the present invention is:
When 1, being fixed by insulation board because of pair of conductors, roughly middle part from the relative direction of powered electrode, with relative direction roughly the direction of quadrature extend and to be provided with binding post, so can be to a pair of powered electrode, the for example good high-frequency current of balance between supply and demand, quenching product mass-energy raising of workpiece etc., the high accuracy of workpiece heating quality obtains stable the time, ledge disappears and to make compact conformation around powered electrode, can be complementary or the like with various production lines, therefore the versatility of device setting is improved.
2, at the output of power supply output transformer, owing to connected the safety coil that is in state in parallel with powered electrode, so around powered electrode, need not to be provided with the fork conductor, because safety coil, really prevented loose contact that the powered electrode workpiece is brought and so on influence simultaneously, the versatility that apparatus structure is simple more, device is provided with is further improved.
3, since the electrical characteristic value of safety coil to be set to when contacting with powered electrode with workpiece the electrical characteristic value between powered electrode corresponding, can prevent under the normal condition harmful effect when workpiece heated, even come in contact bad, harmful effect to workpiece also can be controlled at Min., can be enough fixed electric power heated parts.
4, because the cooling collar that disposes is provided with a plurality of spray-holes along the tooth peak portion of the tooth bar flank of tooth, sprayed cooling water between powered electrode along the tooth peak portion of the tooth bar flank of tooth, thus the tooth peak portion of the flank of tooth etc. positively quench cooled quench in high quality.
Description of drawings:
Fig. 1 is the circuit structure diagram of a kind of form of implementation of direct electric heating device of the present invention.
Fig. 2 is the plane graph of the electrode assembly of direct electric heating device.
Fig. 3 is the front elevation of direct electric heating device.
Fig. 4 is the user mode schematic diagram of direct electric heating device.
Fig. 5 is the enlarged drawing of A part among Fig. 4.
Fig. 6 is the exploded perspective view of the electrode assembly of direct electric heating device.
Fig. 7 is the exploded perspective view of device relative direction shown in Figure 6
Among the figure:
The direct electric heating device of 1------; The 2------frequency changer circuit;
The 2a--2d------branch road; 3a--3d------FET;
The 8------transformer; The 9------output transformer;
The 9a------input coil; The 9b------output winding;
The 10------electrode assembly; The 11------differential transformer;
The 12------current detector; The 13------control device;
The 14------safety coil; 15a, 15b------powered electrode;
The 16------tooth bar; The 16a------flank of tooth;
17a, 17b------conductor; The 18------cooling collar;
The 18a------spray-hole; 19a, 19b------contact site;
20a, 20b------binding post; The 21------insulation board;
The 23------cooling water pipe.
Embodiment:
Fig. 1 in direct electric heating device 1, has a transistor frequency changer circuit 2, and four branch road 2a-2d in the frequency changer circuit 2 have and its four thyristor FET3a---3d that are connected respectively or the like.
And, in each bar branch road 2a-2d of frequency changer circuit 2, branch road 2a connects with branch road 2b, branch road 2c connects with branch road 2d, simultaneously, the tie point of branch road 2a and branch road 2c and DC power supply+end 4a links to each other, the tie point of branch road 2b and branch road 2d and DC power supply-hold 4b to link to each other, therefore, formed complete bridge circuit.In addition, between above-mentioned terminal 4a and the 4b, electrolytic capacitor 5 Hes have been connected, the resistance 6 of series connection and diode 7.
In addition, the branch road 2a in the frequency changer circuit 2 links to each other with the end of the tie point of branch road 2b with the input coil of transformer 8, and branch road 2c links to each other with the other end of the input coil of above-mentioned transformer 8 with the contact of branch road 2d.At the output of this transformer 8, the input coil 9a of output transformer 9 (current transformer) is coupled, and the output winding 9b of output transformer 9 is connected removably with the electrode assembly 10 of narration afterwards.
On this basis, branch road 2a in the frequency changer circuit 2 and the tie point of branch road 2c, and, between the drain electrode of the switch element FET3a among the branch road 2a, and, between the drain electrode of switch element FET3c among the branch road 2c, the tie point of branch road 2b and branch road 2d, and, between the source electrode of switch element FET3b among the branch road 2b, and, between the source electrode of the switch element FET3d among the branch road 2d, connected the differential transformer 11 that the electric current that makes among each bar branch road 2a-2d reaches balance separately.And, in branch road 2b, 2d, connected respectively from the current detector 12 of formation electric currents such as differential transformer, for making switch element FET3a--3d produce the open and close action, the output of this current detector 12 has been connected not the oscillator of expression and power circuit etc. in the drawings, and is connected with control device 13.
The output winding 9b of above-mentioned output transformer 9 for example, can form with material folding one circle that is similar to copper coin roughly cylindraceous or copper pipe, and its output winding 9b has gone up safety coil 14 in parallel.The electrical characteristic values such as induction coefficient of safety coil 14 with corresponding as the electrical characteristic value during contact between powered electrode 15a, the 15b of the tooth bar 16 of workpiece and electrode assembly 10, are set to the smaller value of 1/2-1/10 degree usually.
And if the electrical characteristic value of safety coil 14 surpasses 1/2, the electrical characteristic value of safety coil 14 is excessive, thereby the electrical characteristic value between powered electrode 15a, the 15b is produced harmful effect.If less than 1/10, too little the electrical characteristic value between powered electrode 15a, 15b, thereby can not tackle situations such as loose contact among powered electrode 15a, the 15b, this value draws according to experimental result.
Above-mentioned electrode assembly 10, as Fig. 2-shown in Figure 7, along as vertical (Shaft of the bar-shaped tooth bar 16 of workpiece to), a pair of powered electrode 15a, 15b have been disposed in opposite directions, and, support pair of conductors 17a, the 17b of this powered electrode 15a, 15b respectively, and the bottom between powered electrode 15a, the 15b is provided with cooling collar 18 etc.
Above-mentioned powered electrode 15a, 15b for example, face the copper coin that is similar to the L shape with certain thickness and constitute, and on its vertical direction, have formed contact site 19a, 19b in a narrow margin in the top of its ledge.In addition, this to powered electrode 15a, 15b in, the powered electrode 15a of an end by connecting plate be fixed on one side conductor 17a above, the powered electrode 15b of the other end on the conductor 17b of another side, for example, connects by guide rail 22 movably.
Above-mentioned pair of conductors 17a, 17b along vertically being made of the copper coin of decide thickness of tooth bar 16, simultaneously, at the above-mentioned face of Side longitudinally, have perpendicular to binding post 20a, 20b topmost, and it is given prominence to formation with level and looks squarely and slightly become the T word shape.At this moment, because each binding post 20a, 20b roughly are arranged on each copper coin centre position longitudinally, the distance setting from binding post 20a, 20b to powered electrode 15a, 15b becomes roughly the same.
And this owing to fix by the thing of insulation board 21 usefulness bolts and so on, descends direction also to be fixed to conductor 17a, 17b thereon.Simultaneously, owing to disposed movably powered electrode 15b on the conductor 17b, the size of space between powered electrode 15a, the 15b can be adjusted along with the shape of workpiece (tooth bar 16).And the size of space between powered electrode 15a, the 15b both can be carried out electronic adjustment by manually also available motor, also can make two powered electrode 15a, 15b be configured to and can move jointly with respect to conductor 17a, 17b.And, in the special occasion of workpiece, can not establish guide rail 22, can powered electrode 15a, 15b be fixedly installed corresponding to workpiece and get final product.
Above-mentioned cooling collar 18, its total length are to set corresponding to the length of the quenching flank of tooth of tooth bar 16, and for example, the bottom between powered electrode 15a, 15b is installed with the pedestal 25 that can dismantle corresponding to employed electrode gap.Then, on it is smooth, as shown in Figure 5, for example, designed a plurality of (among the figure 5) spray-hole 18a points upwards along the tooth peak of flank of tooth 16a.In addition, in cooling collar 18, the cooling water pipe 23 on the binding post 20a that is fixedly welded on each conductor 17a, 17b, 20b surface has been installed and has been supplied with cooling water, this cooling water upwards sprays from top spray-hole 18a.
Simultaneously,, cool off from body,, the water pipe that does not have expression among the figure is fixedly connected in the water pipe head 24 in the end of this cooling water pipe 23 so also can be used for binding post 20a, 20b because cooling water pipe 28 is fixed in the surface of binding post 20a, 20b.In addition, the supply of leading to the cooling water of cooling collar 18 is not limited thereto example, for example, also can use cooling collar 18 special-purpose cooling water pipe and with its with figure in do not have the expression apparatus for supplying cool water link to each other, formed of the spray-hole 18a of cooling collar 18, make with the flank of tooth 16a of tooth bar 16 corresponding circular-arcly, also can make the jet length of cooling water be set at roughly even at the circumferencial direction of flank of tooth 16a.
This heater 1 will operate as follows.At first,, the size of space between powered electrode 15a, the 15b is made as institute's definite value simultaneously, below between powered electrode 15a, 15b, the cooling collar 18 with this size of space respective length is set corresponding to the shapes such as length of the flank of tooth 16a of tooth bar 16.Under this state, for example, will not have the heater switch of illustrated operation board to start, above-mentioned oscillator is action just, the FET3a---3d of frequency changer circuit 2 is with regard to open and close, just offers the input side of transformer 8 with the high-frequency current of the corresponding certain frequency of cycle of oscillator.
This high-frequency current, the output transformer 9 of the outlet side by being connected to transformer 8 is converted into big electric current, and conductor 17a, 17b by electrode assembly 10 are provided for powered electrode 15a, 15b.Simultaneously, because conductor 17a, the 17b of electrode assembly 10 drawn from powered electrode 15a, 15b roughly centre position at interval, so high-frequency current just can flow to powered electrode 15a, 15b well-balancedly.Owing to supplied with high-frequency current to powered electrode 15a, 15b, this high-frequency current utilizes the flank of tooth 16a of tooth bar 16 to flow at contact site 19a, the 19b period of contact of powered electrode 15a, 15b, and by Joule heat oneself heating, flank of tooth 16a is heated to institute's fixed temperature.
After high-frequency current was provided certain hour, flank of tooth 16a one was heated to set point of temperature, and the supply of high-frequency current is stopped.Simultaneously, according to the control signal of control device 13, cooling water just is provided for cooling collar 18, and the cooling water that comes from spray-hole 18a sprays to flank of tooth 16a.Because the injection of cooling water, heated flank of tooth 16a quench cooled and being quenched.Simultaneously, owing to a plurality of spray-hole 18a of cooling collar 18 are that tooth peak portion along flank of tooth 16a designs, so cooling water can spray to the tooth peak portion of flank of tooth 16a effectively, this tooth peak portion can intensity according to the rules quench.
By powered electrode 15a, 15b when tooth bar 16 provides high-frequency current, because and the safety coil 14 of flank of tooth 16a parallel connection is connected on the output winding 9b of output transformer 9 of frequency changer circuit 2, so when high-frequency current flows to flank of tooth 16a, also can shunt on safety coil 14.Therefore, for example, even contact site 19a, the 19b of powered electrode 15a, 15b come in contact bad for flank of tooth 16a, the high-frequency current of being supplied with by output transformer 9 flows into safety coil 14 simultaneously, the spark that produces between contact site 19a, the 19b of powered electrode 15a, 15b and the flank of tooth 16a and situations such as flank of tooth 16a sustains damage positively are prevented from.
Because it is in parallel with output transformer 9 output winding 9b, that is to say safety coil 14 in parallel with the flank of tooth 16a of tooth bar 16, so when high-frequency current flows to powered electrode 15a, 15b, be not in complete open-circuit condition between this powered electrode 15a, the 15b, so just avoided high voltage is applied on the very little gap of powered electrode 15a, 15b and tooth bar 16, also just can prevent big spark damage flank of tooth 16a.
And, because safety coil 14 is connected on when flat on the output winding 9b of output transformer 9, even so between powered electrode 15a, 15b and flank of tooth 16a, produce the loose contact of moment, also need not allow frequency changer circuit 2 quit work one after another, eliminate up to loose contact, can make frequency changer circuit 2 in running order, simultaneously, because safety coil 14 has been set optimal electrical characteristic value, harmful effect for the normal heating state can be inhibited, and effectively adds the hot work possibility that just becomes.
As mentioned above, in the heater 1 of above-mentioned form of implementation, pair of conductors 17a, 17b are by insulation board 21, the below is crimped fixing thereon, simultaneously, because from the roughly middle part of the relative direction of powered electrode 15a, 15b, and roughly extend and be provided with binding post 20a, 20b in the position of quadrature, so can offer this powered electrode 15a, 15b to high-frequency current evenly with this relative direction.Particularly, because safety coil 14 and powered electrode 15a, 15b are connected with state in parallel on the output winding 9b of output transformer 9 of frequency changer circuit 2, around powered electrode 15a, 15b, the fork conductor needn't be set.Because safety coil 14 is arranged,, powered electrode 15a, 15b can be prevented really so imposing on the loose contact disastrous effect of tooth bar 16.
In addition, because the electrical characteristic value of safety coil 14, be to set according to the electrical characteristic value between tooth bar 16 and powered electrode 15a, powered electrode 15a, 15b when 15b contacts, for example be made as smaller value, so under normal circumstances, can prevent bad phenomenon to tooth bar 16 heated conditions, and, even come in contact and badly also can be suppressed at bottom line to the influence to tooth bar 16, can be enough certain electric power heats the flank of tooth 16a of tooth bar 16.
Also have, be arranged on the spray-hole 18a of the cooling collar 18 between powered electrode 15a, the 15b, because cooling water sprays in the tooth peak portion along the flank of tooth 16a of tooth bar 16, so tooth peak portion that really can quench cooled flank of tooth 16a, can carry out high-precision quenching to the position, institute bonding part of flank of tooth 16a, Just because of this, for example, the quenching quality of the flank of tooth 16a of tooth bar 16 can improve, and the high-quality of heating and stability can guarantee.
Have again, because safety coil 14 is connected in parallel on the output winding 9b of output transformer 9, around powered electrode 15a, the 15b there be not original ledge that is similar to fork conductor and so on, can constitute compact electrode assembly 10, for example, can adapt with the structure of various quenching lines, the versatility that heater 1 is provided with improves.Simultaneously, the loose contact that is caused by powered electrode 15a, 15b and phenomenon that frequency changer circuit 2 is excessively shut down are prevented, also can prevent really because the damage of the switch element FET3a--3d of the costliness that loose contact brings reduces because switch element damages the number of times of the operation maintenance that is brought, the purpose that reduces cost thereby reach.
Also have, owing on frequency changer circuit 2, designed differential transformer 11, can be balanced so flow through the current value of each branch road 2a--2d of frequency changer circuit 2.Simultaneously, owing on branch road 2b, 2d, be designed current detector 13, so thereby utilizing this rheoscope 13 can measure abnormal current can make frequency changer circuit 2 quit work.A kind of heater 1 with convenience, perfect frequency changer circuit 2 is provided when therefore, device has fabulous fail safe and reliability.
In addition, relevant above-mentioned form of implementation by the output winding 9b side of output transformer 9, safety coil 14 is connected on the output transformer 9, but the present invention is not limited thereto.For example, shown in two dot dot dash among Fig. 1, also can be arranged on the side and the appropriate location between the electrode assembly 10 of output winding 9b of output transformer 9; Also be not limited to high frequency electric source as power supply, also can use power supplys such as intermediate frequency or low frequency.Also have, relevant above-mentioned form of implementation, as the thyristor of frequency changer circuit 2, this example has been used FET3a--3d, but various thyristors such as general transistor, thyristor, IGBT all can be used.
Also have, relevant above-mentioned form of implementation, at powered electrode 15a, when 15b causes loose contact, the also warning such as available buzzer of both available alarm lamp.The present invention has only designed the circuit structure of output transformer 9 at the outlet side of frequency changer circuit 2, and, the drawing of pair of conductors 17a, 17b is not the same direction with the relative direction quadrature of powered electrode 15a, 15b, but rightabout etc. are structurally done suitable change and are not exceeded interest field of the present invention.
The present invention is not limited to powered electrode directly is connected on the structure of the outlet side of output transformer, and the structure by connections such as suitable electrode holder, suitable transformer also is suitable for.
Claims (2)
1, a kind of direct electric heating device comprises at regular intervals a pair of powered electrode of configuration in opposite directions, and, relative direction configuration along this powered electrode links to each other on electric with this powered electrode, simultaneously this powered electrode has been played the pair of conductors of supporting role, it is characterized in that
Described pair of conductors is fixed with the insulation board crimping, simultaneously, from the roughly middle part of described relative direction, with relative direction roughly the direction extended spot of quadrature be provided with binding post, connected the power supply of certain frequency on this binding post;
Described power supply has the output transformer of binding post to be electrically connected with described conductor, has connected a safety coil in parallel with powered electrode on the output of this output transformer;
The induction coefficient of safety coil with corresponding as the induction coefficient during contact between the powered electrode of the tooth bar of workpiece and electrode assembly, is set to the 1/2-1/10 degree.
2, direct electric heating device according to claim 1 is characterized in that, between described powered electrode, is provided with the cooling collar of the tooth bar flank of tooth that is used for cooling off the workpiece after the heating, and this cooling collar is provided with a plurality of spray-holes along flank of tooth tooth peak portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100529187A CN100456896C (en) | 2004-07-16 | 2004-07-16 | Direct-electrifying heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100529187A CN100456896C (en) | 2004-07-16 | 2004-07-16 | Direct-electrifying heating device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1642365A CN1642365A (en) | 2005-07-20 |
| CN100456896C true CN100456896C (en) | 2009-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100529187A Expired - Lifetime CN100456896C (en) | 2004-07-16 | 2004-07-16 | Direct-electrifying heating device |
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| Country | Link |
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| CN (1) | CN100456896C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4447635B2 (en) * | 2007-12-13 | 2010-04-07 | アイシン高丘株式会社 | Electrode support structure and energization heating apparatus having the same |
| CN102234710B (en) * | 2010-04-26 | 2014-07-02 | 宫电高周波设备（上海）有限公司 | Ohmic heating method and ohmic heating device |
| CN104294019A (en) * | 2014-10-28 | 2015-01-21 | 芜湖世特瑞转向系统有限公司 | High-frequency quenching device for steering gear racks and a quenching method thereof |
| CN104313290A (en) * | 2014-10-28 | 2015-01-28 | 芜湖世特瑞转向系统有限公司 | High-frequency quenching device and method for steering gear rack |
| CN110170779B (en) * | 2019-06-25 | 2024-06-18 | 广汽本田汽车有限公司 | Welding system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10183234A (en) * | 1996-12-26 | 1998-07-14 | Denki Kogyo Co Ltd | Direct energizing induction hardening apparatus for rack bar |
| CN1283070A (en) * | 2000-09-15 | 2001-02-07 | 刘文起 | Electricity-heat converter with high-frequency electromagnetic induction |
| JP2001234245A (en) * | 2000-02-25 | 2001-08-28 | Denki Kogyo Co Ltd | High-frequency heating method for rack bar and high- frequency heating device |
-
2004
- 2004-07-16 CN CNB2004100529187A patent/CN100456896C/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10183234A (en) * | 1996-12-26 | 1998-07-14 | Denki Kogyo Co Ltd | Direct energizing induction hardening apparatus for rack bar |
| JP2001234245A (en) * | 2000-02-25 | 2001-08-28 | Denki Kogyo Co Ltd | High-frequency heating method for rack bar and high- frequency heating device |
| CN1283070A (en) * | 2000-09-15 | 2001-02-07 | 刘文起 | Electricity-heat converter with high-frequency electromagnetic induction |
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| Publication number | Publication date |
|---|---|
| CN1642365A (en) | 2005-07-20 |
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