CN203890388U - Quenching inductor - Google Patents
Quenching inductor Download PDFInfo
- Publication number
- CN203890388U CN203890388U CN201420204640.XU CN201420204640U CN203890388U CN 203890388 U CN203890388 U CN 203890388U CN 201420204640 U CN201420204640 U CN 201420204640U CN 203890388 U CN203890388 U CN 203890388U
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- China
- Prior art keywords
- ruhmkorff coil
- quenching inducer
- water service
- service pipe
- ruhmkorff
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000010791 quenching Methods 0.000 title claims abstract description 71
- 230000000171 quenching effect Effects 0.000 title claims abstract description 68
- 230000006698 induction Effects 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 64
- 239000000411 inducer Substances 0.000 claims description 59
- 239000002184 metal Substances 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 238000003491 array Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 abstract description 18
- 239000012141 concentrate Substances 0.000 abstract description 5
- 238000001816 cooling Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910000677 High-carbon steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- 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
Landscapes
- Heat Treatment Of Articles (AREA)
- General Induction Heating (AREA)
Abstract
The utility model discloses a quenching inductor, which comprises at least two induction coils, namely a first induction coil and a second induction coil, wherein the first induction coil is connected with the second induction coil; and the magnetizer is embedded in the first induction coil and the second induction coil. In this way, the utility model discloses can fully concentrate the magnetic line of force that the quenching inductor produced, greatly improve the heating efficiency of quenching inductor and reduce the electric energy loss.
Description
Technical field
The utility model relates to metal manufacture field, particularly relates to a kind of quenching inducer.
Background technology
Quenching inducer is to utilize its ruhmkorff coil on the workpiece such as steel pipe, to produce the equipment that faradic inductive heating principle heats workpiece.Prior art provides following two kinds of quenching inducers: the first quenching inducer as shown in Figure 1, 2, does not all arrange magnetizer on the double-deck ruhmkorff coil 11,12 of this quenching inducer; As shown in Figure 3, this quenching inducer is provided with magnetizer 23 to the second quenching inducer on the front ruhmkorff coil 21 of its double-deck ruhmkorff coil 21,22.
Present inventor finds in long-term R & D, magnetic line of force walk-off-loss in the magnetic field that in prior art, the first quenching inducer produces is large, be that magnetic induction density is lower, and then the induced current producing on workpiece is less, the rate of heating of workpiece is slower, thereby causes that the heating efficiency of quenching inducer is low and power consumption is large; The second quenching inducer can reduce the walk-off-loss of magnetic line of force with respect to the first quenching inducer, improve to a certain extent heating efficiency, reduce current consumption, but it still fails fully to concentrate the magnetic line of force of quenching inducer generation and the heating efficiency that improves quenching inducer, aspect energy-saving and cost-reducing, is still having room for promotion.
Utility model content
The technical problem that the utility model mainly solves is to provide a kind of quenching inducer, and the magnetic line of force that can fully concentrate quenching inducer to produce greatly improves the heating efficiency of quenching inducer and reduces electric energy loss.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: a kind of quenching inducer is provided, comprise: at least two ruhmkorff coils, be respectively the first ruhmkorff coil and the second ruhmkorff coil, wherein the first ruhmkorff coil connects the second ruhmkorff coil; Magnetizer, is embedded in the first ruhmkorff coil and the second ruhmkorff coil.
Wherein, magnetizer around inlay and close-packed arrays in the first ruhmkorff coil and the second ruhmkorff coil.
Wherein, the first ruhmkorff coil and the second ruhmkorff coil are formed by an induction line spiral, and quenching inducer also comprises the first water service pipe and the second water service pipe, and the first water service pipe is provided with posticum.
Wherein, the first ruhmkorff coil and the second ruhmkorff coil are made by a non-magnetic metal tube of hollow, carry out the function of the first ruhmkorff coil and the second ruhmkorff coil and the first water service pipe and the second water service pipe simultaneously, no longer separately establish water service pipe, wherein the first ruhmkorff coil is provided with posticum.
Wherein, posticum quantity is a plurality of, is arranged at the first ruhmkorff coil away from a side of the second ruhmkorff coil.
Wherein, a plurality of posticums are uniformly distributed and interval each other along the periphery of the first ruhmkorff coil, and default angle of water.
Wherein, angle of water is the unspecified angle in 3 °～10 °.
Wherein, the first water service pipe mouth of pipe is arranged at the shaft core position of the first ruhmkorff coil and the second ruhmkorff coil and perpendicular to the first ruhmkorff coil and the second ruhmkorff coil place plane, the second water service pipe mouth of pipe is also perpendicular to the first ruhmkorff coil and the second ruhmkorff coil place plane.
Wherein, the axis of the first water service pipe mouth of pipe and the second water service pipe mouth of pipe is at a distance of a default spacing.
Wherein, default spacing is the arbitrary length in 38mm～42mm.
Wherein, the first ruhmkorff coil and the second ruhmkorff coil are toroidal inductor.
The beneficial effects of the utility model are: be different from the situation of prior art, quenching inducer of the present utility model comprises at least two ruhmkorff coils, are respectively the first ruhmkorff coil and the second ruhmkorff coil, and wherein the first ruhmkorff coil connects the second ruhmkorff coil; And magnetizer, be embedded in the first ruhmkorff coil and the second ruhmkorff coil.By the way, the magnetic line of force that can fully concentrate quenching inducer to produce, greatly improves the heating efficiency of quenching inducer and reduces electric energy loss.
Accompanying drawing explanation
Fig. 1 is the sectional view of the first quenching inducer in prior art;
Fig. 2 is the stereographic map of the first quenching inducer in prior art;
Fig. 3 is the sectional view of the second quenching inducer in prior art;
Fig. 4 is the side-view of the utility model quenching inducer one embodiment;
Fig. 5 is the vertical view of the utility model quenching inducer one embodiment;
Fig. 6 is the vertical view that in the utility model quenching inducer one embodiment, magnetizer is inlayed front quenching inducer.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiments.Embodiment based in the utility model, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
Quenching refers to METAL HEATING PROCESS such as high carbon steel to certain temperature (being generally more than 700 degrees Celsius), then adopts the modes such as water spray or air cooling cooling rapidly, changes the metallographic structure of metal, improves the hardness of metal.Further, the corresponding induction type quenching of the utility model quenching inducer refers to the magnetic field that utilizes ruhmkorff coil and the equifrequent electric current of high frequency to change, generation eddy current is responded in the magnetic field changing in workpiece, eddy current produces huge heat at workpiece, play the heat effect to workpiece, then by the posticum on water service pipe at workpiece surface spray cooling.
Refer to Fig. 4-6, the utility model quenching inducer one embodiment comprises:
Two ruhmkorff coils and magnetizer 33.
Above-mentioned two ruhmkorff coils are respectively the first ruhmkorff coil 31 and the second ruhmkorff coil 32, the first ruhmkorff coils 31 connect the second ruhmkorff coil 32.Further, the first ruhmkorff coil 31 and the second ruhmkorff coil 32 are made by a non-magnetic metal tube of hollow, and the non-magnetic metal tube of this hollow specifically can be the bodys such as copper tube, stainless steel tube, and its shape specifically can be rectangular tube, round tube etc.In other embodiments, the quantity of ruhmkorff coil also can be three or more than, do not make too many restrictions herein.
In present embodiment, the first ruhmkorff coil 31 and the second ruhmkorff coil 32 are toroidal inductor, and the plane parallel at the first ruhmkorff coil 31 and second ruhmkorff coil 32 both places, the line in both axle center is perpendicular to the plane at the first ruhmkorff coil 31 and the second ruhmkorff coil 32 places.In other embodiments, the first ruhmkorff coil 31 and/or the second ruhmkorff coil 32 can be the ruhmkorff coil of other shapes such as rectangle.
Magnetizer 33 is embedded in the first ruhmkorff coil 31 and the second ruhmkorff coil 32.Further, magnetizer 33 around inlay and close-packed arrays in the first ruhmkorff coil 31 and the second ruhmkorff coil 32, be magnetizer 33 around the upper and lower surface of whole the first ruhmkorff coil 31 and the second ruhmkorff coil 32 and side and inlay, wherein upper and lower surface is vertical with the axis of the second ruhmkorff coil 32 with the first ruhmkorff coil 31, and side is parallel with the axis of the second ruhmkorff coil 32 with the first ruhmkorff coil 31.In present embodiment, magnetizer 33 is specially around a side that is embedded in the upper and lower surface of the first ruhmkorff coil 31 and the second ruhmkorff coil 32 and the axis of close the first ruhmkorff coil 31 (or second ruhmkorff coil 32).In other embodiments, magnetizer 33 also can only be embedded in a part of position of the first ruhmkorff coil 31 and the second ruhmkorff coil 32, for example 33 of magnetizers are embedded in a side of the axis of the first ruhmkorff coil 31 and the second ruhmkorff coil 32, the opposite side of the axis of the first ruhmkorff coil 31 and the second ruhmkorff coil 32 is not inlayed magnetizer 33, does not make too many restrictions herein.Magnetizer 33 can be the magneticsubstances such as ferrite, siliconized plate.Be appreciated that quantity when ruhmkorff coil also can be three or more than, the equal correspondence of each ruhmkorff coil is inlaid with magnetizer 33.
Present embodiment is by the first made ruhmkorff coil 31 of non-magnetic metal tube of hollow and the second ruhmkorff coil 32 simultaneously also as water service pipe, and the first ruhmkorff coil 31 and the second ruhmkorff coil 32 are carried out part corresponding to water service pipe function and be specially the first water service pipe 34 shown in accompanying drawing 4-6 and the second water service pipe 35.Further, first water service pipe 34 mouths of pipe are arranged at the shaft core position of the first ruhmkorff coil 31 and the second ruhmkorff coil 32 and perpendicular to the first ruhmkorff coil 31 and the second ruhmkorff coil 32 place planes, second water service pipe 35 mouths of pipe are also perpendicular to the first ruhmkorff coil 31 and the second ruhmkorff coil 32 place planes.In other embodiments, the shaft core position of the first ruhmkorff coil 31 and the second ruhmkorff coil 32 also can be departed from the set position of first water service pipe 34 mouths of pipe.
The axis of first water service pipe 34 mouths of pipe and second water service pipe 35 mouths of pipe is at a distance of a default spacing.Further, this default spacing is the arbitrary length in 38mm～42mm; Also the spacing between first water service pipe 34 mouths of pipe and the axis of second water service pipe 35 mouths of pipe is set to other length numerical value according to actual needs in other embodiments.
In addition, the first ruhmkorff coil 31 is provided with posticum 36.In present embodiment, the quantity of posticum 36 is a plurality of, and a plurality of posticums 36 are arranged at the first ruhmkorff coil 31 away from a side of the second ruhmkorff coil 32.A plurality of posticums 36 are uniformly distributed and posticum 36 interval each other along the periphery of the first ruhmkorff coil 31, and default angle of water.Further, this angle of water is the unspecified angle in 3 °～10 °, is preferably 5 °.The aperture of a plurality of posticums 36 is the arbitrary length in 1.8mm～2mm.The angle of the axis of posticum 36 and the axis of quenching inducer is 35 °～45 °, and the axis of quenching inducer is the axis of the first ruhmkorff coil 31 or the second ruhmkorff coil 32 in the present embodiment.Also the angle of the angle of water of posticum 36, aperture and the axis of posticum 36 and the axis of quenching inducer is set to other numerical value according to actual needs in other embodiments.
When needs quench to metal works such as steel pipes, first utilize nut to be fixed on copper rod the quenching inducer of present embodiment, make workpiece to be quenched be arranged in the first ruhmkorff coil 31 and the second ruhmkorff coil 32, and workpiece does not contact with ruhmkorff coil.Then by copper rod, quenching inducer is switched on, owing to having alternating-current by making the quenching inducer that includes ruhmkorff coil form a circle magnetic field around, due to the variation of field direction, can make workpiece surface to be quenched produce induced current, by induced current, workpiece surface is heated.After workpiece is heated to a certain proper temperature, be incubated for some time, the process insulation required time that wherein utilizes the quenching inducer of present embodiment to quench is shorter, generally only needs several seconds of insulation or still less.In insulation, immediately workpiece is carried out to quick cooling process later, by pressurization, make the quenching medias such as water enter from the mouth of pipe of one end away from ruhmkorff coil of the first water service pipe 34, the second water service pipe 35, water flows to the first ruhmkorff coil 31 and second ruhmkorff coil 32 of hollow by the first water service pipe 34, the second water service pipe 35, can carry out cooling to the ruhmkorff coil of heating, in a plurality of posticums 36 of water from the first ruhmkorff coil 31, become evenly ejection and workpiece is carried out cooling of parabolic shape simultaneously, so far complete quenching technology process.The quenching inducer of present embodiment is applicable to heating frequencies such as ultrasonic frequency, intermediate frequency, high frequency or power frequencies.
Above-mentioned, utilize in the process that induced current heats workpiece, the size of magnetic induction density determines faradic size, and faradic size further determines the rate of heating of workpiece surface.Magnetizer 33 on the first ruhmkorff coil 31 and the second ruhmkorff coil 32, because its magnetic resistance is very little, is easy to magnetic flux and passes through; In addition the first ruhmkorff coil 31 and the second ruhmkorff coil 32 are all inlayed magnetizer 33 density and the direction of boundling magnetic flux better, fully the concentration magnetic line of force is to increase magnetic induction density, increase induced current, and then improve the rate of heating of workpiece and the first ruhmkorff coil 31 of quenching inducer and service efficiency and the power factor of the second ruhmkorff coil 32, make full use of the heating power adding on workpiece.Magnetizer 33 can also be controlled density and the direction of magnetic flux, changes faradic distribution, thereby realizes accurate controlling magnetic field to meet different demand for heat.In addition, on the first ruhmkorff coil 31 and the second ruhmkorff coil 32, all inlay magnetizer 33, can expand the heating region in quenching process, indirectly extend heat-up time, the heating of workpiece is more full and uniform, slows down the heat treatment deformation of workpiece.
The first ruhmkorff coil 31 of present embodiment and the second ruhmkorff coil 32 are made by a non-magnetic metal tube of hollow, carry out the function of the first ruhmkorff coil 31 and the second ruhmkorff coil 32 and the first water service pipe 34 and the second water service pipe 35 simultaneously, no longer separately establish water service pipe.In other embodiments, the first ruhmkorff coil 31 and the second ruhmkorff coil 32 also can be formed by an induction line or induction wire harness spiral, quenching inducer also comprises the first water service pipe 34 and the second water service pipe 35 simultaneously, the first water service pipe 34 is connected one end of the first ruhmkorff coil 31, the second water service pipe 35 is connected one end of the second ruhmkorff coil 32, wherein the first water service pipe 34 or the second water service pipe 35 are provided with posticum, now 32 of the first ruhmkorff coil 31 and the second ruhmkorff coils can not be hollow, and the first ruhmkorff coil 31 need not set out water hole 36 simultaneously.
In addition, in other another embodiments, the first ruhmkorff coil 31 and the second ruhmkorff coil 32 can be formed by an induction line or induction wire harness spiral equally, same quenching inducer also comprises the first water service pipe 34 and the second water service pipe 35, the first water service pipe 34 and the second water service pipe 35 are not arranged on the first ruhmkorff coil 31 and the second ruhmkorff coil 32, but within 32 minutes, be arranged with the first ruhmkorff coil 31 and the second ruhmkorff coil, utilizing the first ruhmkorff coil 31 and 32 pairs of workpiece of the second ruhmkorff coil to be heated to after certain temperature, use and divide the first water service pipe 34 and 35 pairs of workpiece of the second water service pipe of being arranged to carry out spray cooling.
Be appreciated that the utility model quenching inducer one embodiment comprises the first ruhmkorff coil, the second ruhmkorff coil and magnetizer, wherein the first ruhmkorff coil connects the second ruhmkorff coil, and magnetizer is embedded in the first ruhmkorff coil and the second ruhmkorff coil.By two ruhmkorff coils at quenching inducer, all inlay magnetizer, the magnetic line of force that can fully concentrate quenching inducer to produce, greatly improve the heating efficiency of quenching inducer and reduce electric energy loss, and the workpiece internal layer hardness after quench treatment is higher and wear-resisting, workpiece outer wall toughness is higher shock-resistant, and workpiece quality is higher; In addition directly on the first ruhmkorff coil and/or the second ruhmkorff coil, set out water hole, realize cooling hydrosphere and ruhmkorff coil are united two into one, make the structure of quenching inducer lighter.
The foregoing is only embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or conversion of equivalent flow process that utilizes the utility model specification sheets and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (11)
1. a quenching inducer, is characterized in that, comprising:
At least two ruhmkorff coils, are respectively the first ruhmkorff coil (31) and the second ruhmkorff coil (32), and wherein said the first ruhmkorff coil (31) connects described the second ruhmkorff coil (32);
Magnetizer (33), is embedded in described the first ruhmkorff coil (31) and described the second ruhmkorff coil (32).
2. quenching inducer according to claim 1, is characterized in that,
Described magnetizer (33) around inlay and close-packed arrays in described the first ruhmkorff coil (31) and described the second ruhmkorff coil (32).
3. quenching inducer according to claim 1, is characterized in that,
Described the first ruhmkorff coil (31) and described the second ruhmkorff coil (32) are formed by an induction line spiral, described quenching inducer also comprises the first water service pipe (34) and the second water service pipe (35), and described the first water service pipe (34) is provided with posticum.
4. quenching inducer according to claim 3, is characterized in that,
Described the first ruhmkorff coil (31) and described the second ruhmkorff coil (32) are made by a non-magnetic metal tube of hollow, carry out the function of described the first ruhmkorff coil (31) and described the second ruhmkorff coil (32) and the first water service pipe (34) and the second water service pipe (35) simultaneously, no longer separately establish water service pipe, wherein said the first ruhmkorff coil (31) is provided with posticum (36).
5. quenching inducer according to claim 4, is characterized in that,
Described posticum (36) quantity is a plurality of, is arranged at described the first ruhmkorff coil (31) away from a side of described the second ruhmkorff coil (32).
6. quenching inducer according to claim 5, is characterized in that,
Described a plurality of posticum (36) is uniformly distributed and interval each other along the periphery of the first ruhmkorff coil (31), and default angle of water.
7. quenching inducer according to claim 6, is characterized in that,
Described angle of water is the unspecified angle in 3 °～10 °.
8. quenching inducer according to claim 3, is characterized in that:
Described the first water service pipe (34) mouth of pipe is arranged at the shaft core position of described the first ruhmkorff coil (31) and the second ruhmkorff coil (32) and perpendicular to described the first ruhmkorff coil (31) and the second ruhmkorff coil (32) place plane, described the second water service pipe (35) mouth of pipe is also perpendicular to described the first ruhmkorff coil (31) and the second ruhmkorff coil (32) place plane.
9. quenching inducer according to claim 8, is characterized in that,
The axis of described the first water service pipe (34) mouth of pipe and described the second water service pipe (35) mouth of pipe is at a distance of a default spacing.
10. quenching inducer according to claim 9, is characterized in that,
Described default spacing is the arbitrary length in 38mm～42mm.
11. according to the quenching inducer described in claim 1-10 any one, it is characterized in that,
Described the first ruhmkorff coil (31) and described the second ruhmkorff coil (32) are toroidal inductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420204640.XU CN203890388U (en) | 2014-04-24 | 2014-04-24 | Quenching inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420204640.XU CN203890388U (en) | 2014-04-24 | 2014-04-24 | Quenching inductor |
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| Publication Number | Publication Date |
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| CN203890388U true CN203890388U (en) | 2014-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420204640.XU Expired - Fee Related CN203890388U (en) | 2014-04-24 | 2014-04-24 | Quenching inductor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107419084A (en) * | 2017-09-18 | 2017-12-01 | 安徽省宣城市永健机械有限公司 | A kind of quenching inducer |
| JPWO2020235598A1 (en) * | 2019-05-23 | 2020-11-26 | ||
| US11473161B2 (en) | 2017-11-24 | 2022-10-18 | Grant Prideco, L.P. | Apparatus and methods for heating and quenching tubular members |
-
2014
- 2014-04-24 CN CN201420204640.XU patent/CN203890388U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107419084A (en) * | 2017-09-18 | 2017-12-01 | 安徽省宣城市永健机械有限公司 | A kind of quenching inducer |
| US11473161B2 (en) | 2017-11-24 | 2022-10-18 | Grant Prideco, L.P. | Apparatus and methods for heating and quenching tubular members |
| JPWO2020235598A1 (en) * | 2019-05-23 | 2020-11-26 | ||
| WO2020235598A1 (en) * | 2019-05-23 | 2020-11-26 | 日本製鉄株式会社 | Secondary coil module, traverse hardening apparatus, and traverse hardening method |
| CN113891947A (en) * | 2019-05-23 | 2022-01-04 | 日本制铁株式会社 | Secondary coil module, movable quenching device and movable quenching method |
| JP7226539B2 (en) | 2019-05-23 | 2023-02-21 | 日本製鉄株式会社 | SECONDARY COIL MODULE, MOVEMENT HARDENING APPARATUS, AND MOVEMENT HARDENING METHOD |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141022 Termination date: 20210424 |