JPH0554534U - Outer surface cooling jacket - Google Patents
Outer surface cooling jacketInfo
- Publication number
- JPH0554534U JPH0554534U JP110754U JP11075491U JPH0554534U JP H0554534 U JPH0554534 U JP H0554534U JP 110754 U JP110754 U JP 110754U JP 11075491 U JP11075491 U JP 11075491U JP H0554534 U JPH0554534 U JP H0554534U
- Authority
- JP
- Japan
- Prior art keywords
- outer peripheral
- peripheral surface
- cooling liquid
- jacket
- jackets
- 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.)
- Pending
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 22
- 230000002093 peripheral effect Effects 0.000 claims abstract description 56
- 239000000110 cooling liquid Substances 0.000 claims abstract description 45
- 238000002347 injection Methods 0.000 claims abstract description 21
- 239000007924 injection Substances 0.000 claims abstract description 21
- 238000010791 quenching Methods 0.000 claims abstract description 19
- 230000000171 quenching effect Effects 0.000 claims abstract description 15
- 238000005192 partition Methods 0.000 claims abstract description 14
- 239000002826 coolant Substances 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 abstract description 20
- 238000010438 heat treatment Methods 0.000 description 18
- 239000004020 conductor Substances 0.000 description 6
- 238000010304 firing Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000005336 cracking Methods 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
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- Heat Treatment Of Articles (AREA)
Abstract
(57)【要約】
【目的】 等速ジョイント60の転走面62を焼入するとき
に、形成された硬化層の深さを均一にし、焼き割れの発
生とズブ焼の防止が可能であるのみならず、転送面62の
歪みの制御をも行えるようにする。
【構成】 外周面冷却ジャケット10は、等速ジョイント
60の外周面63を取り囲むように上下方向に配設された３
個の環状のジャケット11、12および13と、これらジャケ
ットに外周面63に向かって設けた冷却液噴射孔19と、隣
り合うジャケット間に設けられ端部が外周面63面に接近
している仕切板15と、各ジャケットに対して設けた流量
制御弁18とを備え、ジャケットと仕切板との間には、隙
間が設けられている。そして、転走面62の焼入中に、冷
却液Ｌを外周面63に噴射する。
(57) [Abstract] [Purpose] When quenching the rolling surface 62 of the constant velocity joint 60, it is possible to make the depth of the formed hardened layer uniform and prevent the occurrence of quenching cracks and zubbing. Not only can the distortion of the transfer surface 62 be controlled. [Constitution] Peripheral cooling jacket 10 is a constant velocity joint
3 vertically arranged to surround the outer peripheral surface 63 of 60
Individual annular jackets 11, 12 and 13, cooling liquid injection holes 19 provided in these jackets toward the outer peripheral surface 63, and a partition provided between adjacent jackets, the end of which is close to the outer peripheral surface 63. A plate 15 and a flow control valve 18 provided for each jacket are provided, and a gap is provided between the jacket and the partition plate. Then, during quenching of the rolling surface 62, the cooling liquid L is sprayed onto the outer peripheral surface 63.
Description
【０００１】[0001]
本考案は、例えば自動車の走行系に用いられる等速ジョイントのようなほぼ筒 状のワークの外周面を冷却する外周面冷却ジャケットに関する。 The present invention relates to an outer peripheral surface cooling jacket for cooling the outer peripheral surface of a substantially cylindrical work such as a constant velocity joint used in a traveling system of an automobile.
【０００２】[0002]
以下、図面を参照し、焼入のために冷却されるワークとして等速ジョイントを 採り上げて従来の技術を説明する。図３に示すように、等速ジョイント60は、軸 65の下部に、ほぼ円筒状の筒状部分69があり、この筒状部分69は、内周面には、 ３個の厚肉部61a と、３個の薄肉部61b と、厚肉部61a と薄肉部61b とをなだら かに連結する３個の転走面62を備えている。図示しないボールやローラが転走面 62に沿って転がる。63は筒状部分69の外周面63である。 Hereinafter, a conventional technique will be described with reference to the drawings, taking a constant velocity joint as a work cooled for quenching. As shown in FIG. 3, the constant velocity joint 60 has a substantially cylindrical tubular portion 69 under the shaft 65, and the tubular portion 69 has three thick portions 61a on the inner peripheral surface thereof. And three rolling portions 62 for gently connecting the thin portion 61a and the thin portion 61b. Balls and rollers (not shown) roll along the rolling surface 62. 63 is the outer peripheral surface 63 of the tubular portion 69.
【０００３】 図２において、20は等速ジョイント60の転走面62を加熱する高周波加熱コイル （以下単に加熱コイルという) であって、加熱コイル20は、１対の電源導体24と 、転走面62を加熱する６個の垂直な加熱導体21と、これら加熱導体21を順次直列 に接続する水平な３個の接続導体22と、水平な２個の接続導体23とを備えている 。なお、30は先端に冷却液噴射孔31が開設されている冷却液噴射管である。In FIG. 2, reference numeral 20 denotes a high-frequency heating coil (hereinafter, simply referred to as a heating coil) that heats the rolling surface 62 of the constant velocity joint 60. The heating coil 20 includes a pair of power supply conductors 24 and a rolling contact. It is provided with six vertical heating conductors 21 for heating the surface 62, three horizontal connecting conductors 22 for sequentially connecting the heating conductors 21 in series, and two horizontal connecting conductors 23. Reference numeral 30 is a cooling liquid injection pipe having a cooling liquid injection hole 31 formed at its tip.
【０００４】 図４は従来の外周面冷却ジャケットの説明図であって、転送面62を焼入する場 合を説明する。ワーク載置台90上に載置された等速ジョイント60の内部に、加熱 コイル20と冷却液噴射管30が一体となって挿入され、１対ずつの加熱導体21がそ れぞれ転走面62に対向するように配設されてから、加熱コイル20によって、転走 面62が加熱される。所定時間の加熱が終了すると、冷却液噴射孔31から冷却液Ｍ を噴出して転走面62を冷却する。FIG. 4 is an explanatory view of a conventional outer peripheral surface cooling jacket, and a case of quenching the transfer surface 62 will be described. The heating coil 20 and the cooling liquid injection pipe 30 are integrally inserted into the constant velocity joint 60 placed on the work placing table 90, and the pair of heating conductors 21 are provided on each rolling surface. The rolling surface 62 is heated by the heating coil 20 after being disposed so as to face the rolling surface 62. When the heating for a predetermined time is completed, the cooling liquid M 3 is jetted from the cooling liquid jet hole 31 to cool the rolling surface 62.
【０００５】 一方、等速ジョイント60の周囲に等速ジョイント60の外周面63に対向するよに 配設された環状の外周面冷却ジャケット40の複数の冷却液噴射孔41からは、通常 、加熱コイル20による転走面62の加熱の開始から冷却液Ｍの噴射の終了時点にい たるまで、冷却液Ｌが外周面63に噴射される。このように冷却液Ｌを噴射すると 、等速ジョイント60の転送面62に形成された硬化層の深さを均一にし、焼き割れ の発生とズブ焼の防止とが可能になる。On the other hand, from the plurality of cooling liquid injection holes 41 of the annular outer peripheral surface cooling jacket 40 arranged around the constant velocity joint 60 so as to face the outer peripheral surface 63 of the constant velocity joint 60, heating is normally performed. From the start of heating of the rolling surface 62 by the coil 20 to the end of the injection of the cooling liquid M, the cooling liquid L is sprayed onto the outer peripheral surface 63. By injecting the cooling liquid L in this way, the depth of the hardened layer formed on the transfer surface 62 of the constant velocity joint 60 can be made uniform, and it becomes possible to prevent the occurrence of quench cracks and smoldering.
【０００６】[0006]
しかしながら、等速ジョイント60の外周面63の上記のような冷却の仕方では、 転送面62の焼入後の歪みまでを制御することは困難である。即ち、転送面62の歪 みを制御しようとして外周面63の各部に噴射する冷却液の量を制御しても、外周 面63の上部に噴射された冷却液Ｌは、外周面63に当たった後に、降下して外周面 63の下部に流れ落ちるので、この流れ落ちる冷却液Ｌに邪魔されて、本来外周面 63の下部に衝突して下部を冷却すべき冷却液Ｌの下部へのかかり具合が悪くなる 結果、転送面62の歪みの制御が困難であった。 However, it is difficult to control even the distortion of the transfer surface 62 after quenching by the above-described cooling method of the outer peripheral surface 63 of the constant velocity joint 60. That is, even if the amount of the cooling liquid sprayed to each part of the outer peripheral surface 63 is controlled in order to control the distortion of the transfer surface 62, the cooling liquid L sprayed on the upper part of the outer peripheral surface 63 hits the outer peripheral surface 63. After that, since it descends and flows down to the lower part of the outer peripheral surface 63, it is disturbed by the flowing cooling liquid L and collides with the lower part of the outer peripheral surface 63 to cool the lower part. As a result, it is difficult to control the distortion of the transfer surface 62.
【０００７】 本考案は上記事情に鑑みて創案されたものであって、ワークの内面焼入時に、 形成された硬化層の深さを均一にし、焼き割れの発生とズブ焼の防止が可能であ るのみならず、ワークの歪みの制御をも行えるように冷却液を噴射することがで きる外周面冷却ジャケットを提供することを目的としている。The present invention was devised in view of the above circumstances, and when hardening the inner surface of a work, it is possible to make the depth of the formed hardened layer uniform, and to prevent the occurrence of quench cracks and zub firing. It is an object of the present invention to provide an outer circumferential surface cooling jacket that can inject a cooling liquid so as to control not only the distortion of the work but also the work.
【０００８】[0008]
上記問題を解決するために、本考案の外周面冷却ジャケットは、ワークの内面 焼入時にワークの外周面に冷却液を噴射する外周面冷却ジャケットにおいて、前 記外周面を取り囲むように且つほぼ上下方向に配設された環状の複数のジャケッ トと、これらジャケットに前記外周面に向かって設けた冷却液噴射孔と、端部が 前記外周面に接近するように隣り合うジャケット間に設けた仕切板と、各ジャケ ットに対して設けた冷却液流量の制御装置とを備え、ジャケットの下面と仕切板 との間に隙間を設けている。 In order to solve the above problem, the outer peripheral surface cooling jacket of the present invention is an outer peripheral surface cooling jacket that injects a cooling liquid to the outer peripheral surface of a work during quenching of the inner surface of the work so as to surround the outer peripheral surface and substantially vertically. Directions, a plurality of annular jackets, cooling liquid injection holes provided in these jackets toward the outer peripheral surface, and a partition provided between the adjacent jackets so that their ends approach the outer peripheral surface. A plate and a cooling liquid flow rate control device provided for each jacket are provided, and a gap is provided between the lower surface of the jacket and the partition plate.
【０００９】[0009]
【実施例】 以下、図面を参照して本考案の一実施例を説明する。ワークとしては前記の等 速ジョイントを採り上げる。図１は本実施例の説明図であって、同図に示すよう に、本考案の外周面冷却ジャケット10は、等速ジョイント60の転走面62を焼入す るときに、等速ジョイント60の外周面63に冷却液Ｌを噴射する外周面冷却ジャケ ットである。Embodiment An embodiment of the present invention will be described below with reference to the drawings. As the work, the constant velocity joint mentioned above will be adopted. FIG. 1 is an explanatory view of this embodiment. As shown in FIG. 1, the outer peripheral surface cooling jacket 10 of the present invention is a constant velocity joint when the rolling surface 62 of the constant velocity joint 60 is hardened. An outer peripheral cooling jacket for injecting the cooling liquid L onto the outer peripheral surface 63 of 60.
【００１０】 この外周面冷却ジャケット10は、等速ジョイント60の周囲に、外周面63に対向 するように且つ上下方向に配設された複数（本実施例では３個) のジャケット11 、12および13を備えている。ジャケット11、12および13は、それぞれ、断面４角 形状であり、冷却液Ｌが送り込まれる中空部分14が形成されている。そして、外 周面63に対向した側面には、複数の冷却液噴射孔19が開設されている。The outer peripheral surface cooling jacket 10 includes a plurality (three in this embodiment) of jackets 11 and 12 arranged around the constant velocity joint 60 in a vertical direction so as to face the outer peripheral surface 63. Equipped with 13. Each of the jackets 11, 12 and 13 has a square cross section and has a hollow portion 14 into which the cooling liquid L is fed. A plurality of cooling liquid injection holes 19 are formed on the side surface facing the outer peripheral surface 63.
【００１１】 ジャケット11と12とは、また、ジャケット12と13とは、それぞれ連結ピン16に よって固定されている。そして、ジャケット12および13の上面には、それぞれ、 仕切板15が固定されている。仕切板15の等速ジョイント60側の端部は、等速ジョ イント60の外周面63に向かって延長され、外周面63の形状に対応するように形成 されているので、仕切板15の端部と外周面63の間には、僅かな隙間が残されてい る。なお、連結ピン15の長さは、ジャケット11、12の下面と仕切板15との間に、 冷却液Ｌが流出路となる隙間ができるように選定されている。そして、各ジャケ ットに冷却液Ｌを供給する配管には、冷却液Ｌの流量を制御することができる流 量制御弁18が設けられている。The jackets 11 and 12 and the jackets 12 and 13 are fixed by connecting pins 16, respectively. A partition plate 15 is fixed to the upper surfaces of the jackets 12 and 13, respectively. The end of the partition plate 15 on the constant velocity joint 60 side extends toward the outer peripheral surface 63 of the constant velocity joint 60 and is formed to correspond to the shape of the outer peripheral surface 63. A slight gap is left between the part and the outer peripheral surface 63. The length of the connecting pin 15 is selected so that there is a gap between the lower surfaces of the jackets 11 and 12 and the partition plate 15 so that the cooling liquid L serves as an outflow passage. A flow rate control valve 18 that can control the flow rate of the cooling liquid L is provided in the pipe that supplies the cooling liquid L to each jacket.
【００１２】 次に、本実施例の外周面冷却ジャケット10と、従来の技術で説明した加熱コイ ル20と冷却液噴射管30とを用いて等速ジョイント60の転走面62を焼入する動作を 説明する。まず、それぞれのジャケットに対する流量制御弁20の開度を調節して 、ジャケット11、12および13から噴射される冷却液Ｌの流量を設定する。この設 定は、転走面62が焼入された等速ジョイント60に焼き割れやズブ焼きが発生する ことなく均一な硬化層が形成され、しかも、転送面62の歪みが少なくなるような 流量にする。Next, the rolling surface 62 of the constant velocity joint 60 is hardened by using the outer peripheral surface cooling jacket 10 of this embodiment, the heating coil 20 and the cooling liquid injection pipe 30 described in the prior art. Describe the operation. First, the opening of the flow control valve 20 for each jacket is adjusted to set the flow rate of the cooling liquid L injected from the jackets 11, 12 and 13. With this setting, a uniform hardened layer is formed in the constant velocity joint 60 with the rolling surface 62 quenched, without causing cracking or squeezing, and the strain on the transfer surface 62 is reduced. To
【００１３】 この後、図示しない冷却液供給源から、各流量制御弁18を介して冷却液Ｌをジ ャケット11、12および13に供給して、各ジャケットの冷却液噴射孔19から等速ジ ョイント60の外周面63に向かって冷却液Ｌの噴射を開始し、また、高周波加熱コ イル1 への通電を開始する。この通電を所定時間行って転走面62を加熱してから 、通電を断ち、冷却液噴射管30の先端から冷却液Ｍを噴射し転走面62を冷却して 焼入を終了する。焼入の終了と同時にジャケット11、12および13からの冷却液Ｌ の噴射を停止する。Thereafter, a cooling liquid L is supplied from a cooling liquid supply source (not shown) to each of the jackets 11, 12 and 13 via each flow rate control valve 18, and a constant velocity jet is supplied from the cooling liquid injection hole 19 of each jacket. The injection of the cooling liquid L is started toward the outer peripheral surface 63 of the joint 60, and the energization of the high frequency heating coil 1 is started. This energization is carried out for a predetermined time to heat the rolling surface 62, then the energization is cut off, the cooling liquid M is injected from the tip of the cooling liquid injection pipe 30 to cool the rolling surface 62, and the quenching is completed. Simultaneously with the completion of quenching, the injection of the cooling liquid L 1 from the jackets 11, 12 and 13 is stopped.
【００１４】 ジャケット11、12および13から噴射された冷却液Ｌは、等速ジョイント60の外 周面63に衝突して、それぞれ、上部、中部および下部を冷却する。そして、外周 面63の各部を冷却した冷却液Ｌは、仕切板15の上面を移動してから仕切板15の外 へ流れ落ちるので、外周面63の他部にかかることがないから、外周面63の上部、 中部および下部の各部は、所定の流量の冷却液Ｌを受ける。The cooling liquid L sprayed from the jackets 11, 12 and 13 collides with the outer peripheral surface 63 of the constant velocity joint 60 and cools the upper part, the middle part and the lower part, respectively. Then, the cooling liquid L that has cooled each part of the outer peripheral surface 63 moves on the upper surface of the partition plate 15 and then flows out of the partition plate 15, so that it does not reach the other part of the outer peripheral surface 63. The upper part, the middle part and the lower part receive the cooling liquid L at a predetermined flow rate.
【００１５】 従って、本実施例の外周面冷却ジャケット10によって等速ジョイント60の外周 面63を焼入中に冷却すると、焼き割れが生じたり、ズブ焼となることなく均一な 深さの硬化層を形成することができ、しかも、転送面62の焼入後の歪みも少なく なる。Therefore, when the outer peripheral surface 63 of the constant velocity joint 60 is cooled by the outer peripheral surface cooling jacket 10 of the present embodiment during quenching, a hardened layer having a uniform depth without causing quenching cracks or zub-quenching. Can be formed, and the distortion of the transfer surface 62 after quenching can be reduced.
【００１６】 なお、本実施例では、ジャケット11、12および13からの冷却液Ｌの噴射を、転 走面62の加熱開始時に開始し、冷却液Ｍの噴射終了時に停止しているが、場合に よって、転走面62の加熱の途中に噴射を開始し、冷却液Ｍの噴射終了の前に噴射 を停止することもある。また、本実施例では、等速ジョイント60としてトリポー ト型のものを採り上げたが、等速ジョイントの構造によっては、例えば螺線状の 加熱コイルを用い、等速ジョイントを回転しながら、転走面の加熱および冷却を 行うこともある。In this embodiment, the injection of the cooling liquid L from the jackets 11, 12 and 13 is started at the start of heating the rolling surface 62 and stopped at the end of the injection of the cooling liquid M. Therefore, the injection may be started during the heating of the rolling contact surface 62 and stopped before the end of the injection of the cooling liquid M. In the present embodiment, the tripod type constant velocity joint 60 is adopted. However, depending on the structure of the constant velocity joint, for example, a spiral heating coil is used and rolling is performed while rotating the constant velocity joint. The surface may be heated and cooled.
【００１７】[0017]
【考案の効果】 以上説明したように、本考案の外周面冷却ジャケットは、ワークの内面焼入時 にワークの外周面に冷却液を噴射する外周面冷却ジャケットにおいて、前記外周 面を取り囲むように且つほぼ上下方向に配設された環状の複数のジャケットと、 これらジャケットに前記外周面に向かって設けた冷却液噴射孔と、端部が前記外 周面に接近するように隣り合うジャケット間に設けた仕切板と、各ジャケットに 対して設けた冷却液流量の制御装置とを備え、ジャケットの下面と仕切板との間 に隙間を設けている。As described above, the outer peripheral surface cooling jacket of the present invention surrounds the outer peripheral surface in the outer peripheral surface cooling jacket which injects the cooling liquid to the outer peripheral surface of the work during quenching of the inner surface of the work. In addition, a plurality of annular jackets arranged substantially in the vertical direction, cooling liquid injection holes provided in these jackets toward the outer peripheral surface, and between the adjacent jackets so that their ends are close to the outer peripheral surface. The partition plate provided and a control device for the flow rate of the cooling liquid provided for each jacket are provided, and a gap is provided between the lower surface of the jacket and the partition plate.
【００１８】 従って、本考案の外周面冷却ジャケットを用いてワークの内面焼入を行ったと きには、ワークの外周面に噴射される冷却液の量を部分別に制御できるので、焼 き割れが生じたり、ズブ焼となることなく均一な深さの硬化層を形成することが でき、しかも、ワークの焼入後の歪みも少なくなる。Therefore, when the inner surface of the work is quenched by using the outer surface cooling jacket of the present invention, the amount of the cooling liquid sprayed on the outer surface of the work can be controlled for each part, so that the quench cracks are generated. It is possible to form a hardened layer having a uniform depth without causing the occurrence or squeeze firing, and also reducing the strain after quenching the work.
【図１】本考案の一実施例の外周面冷却ジャケットの説
明図である。FIG. 1 is an explanatory view of an outer peripheral surface cooling jacket according to an embodiment of the present invention.
【図２】加熱コイルと冷却液噴射管の斜視図である。FIG. 2 is a perspective view of a heating coil and a cooling liquid injection pipe.
【図３】等速ジョイントの斜視図である。FIG. 3 is a perspective view of a constant velocity joint.
【図４】従来の外周面冷却ジャケットの説明図である。FIG. 4 is an explanatory view of a conventional outer peripheral surface cooling jacket.
11〜13 ジャケット 15 仕切板 18 流量制御弁 19 冷却液噴射孔 60 等速ジョイント 62 転走面 63 外周面 11 to 13 Jacket 15 Partition plate 18 Flow control valve 19 Coolant injection hole 60 Constant velocity joint 62 Rolling surface 63 Outer peripheral surface
Claims (1)
冷却液を噴射する外周面冷却ジャケットにおいて、前記
外周面を取り囲むように且つほぼ上下方向に配設された
環状の複数のジャケットと、これらジャケットに前記外
周面に向かって設けた冷却液噴射孔と、端部が前記外周
面に接近するように隣り合うジャケット間に設けた仕切
板と、各ジャケットに対して設けた冷却液流量の制御装
置とを備え、ジャケットの下面と仕切板との間に隙間を
設けたことを特徴とする外周面冷却ジャケット。1. An outer peripheral surface cooling jacket for injecting a cooling liquid onto the outer peripheral surface of a work during quenching of the inner surface of the work, comprising a plurality of annular jackets arranged so as to surround the outer peripheral surface and substantially vertically. Coolant injection holes provided in these jackets toward the outer peripheral surface, a partition plate provided between adjacent jackets so that the end portions approach the outer peripheral surface, and a coolant flow rate provided for each jacket. An outer peripheral cooling jacket comprising a control device and a gap provided between the lower surface of the jacket and the partition plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP110754U JPH0554534U (en) | 1991-12-17 | 1991-12-17 | Outer surface cooling jacket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP110754U JPH0554534U (en) | 1991-12-17 | 1991-12-17 | Outer surface cooling jacket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0554534U true JPH0554534U (en) | 1993-07-20 |
Family
ID=14543718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP110754U Pending JPH0554534U (en) | 1991-12-17 | 1991-12-17 | Outer surface cooling jacket |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0554534U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030037625A (en) * | 2001-11-07 | 2003-05-14 | 현대자동차주식회사 | Quenching jacket system |
| CN104745779A (en) * | 2015-04-22 | 2015-07-01 | 徐工集团工程机械股份有限公司 | Multi-stage induction quenching device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5547866U (en) * | 1978-09-25 | 1980-03-28 | ||
| JPS5655236U (en) * | 1979-10-05 | 1981-05-14 |
-
1991
- 1991-12-17 JP JP110754U patent/JPH0554534U/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5547866U (en) * | 1978-09-25 | 1980-03-28 | ||
| JPS5655236U (en) * | 1979-10-05 | 1981-05-14 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030037625A (en) * | 2001-11-07 | 2003-05-14 | 현대자동차주식회사 | Quenching jacket system |
| CN104745779A (en) * | 2015-04-22 | 2015-07-01 | 徐工集团工程机械股份有限公司 | Multi-stage induction quenching device |
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