JPH06158148A - Cooling device for quenching oil - Google Patents
Cooling device for quenching oilInfo
- Publication number
- JPH06158148A JPH06158148A JP30706192A JP30706192A JPH06158148A JP H06158148 A JPH06158148 A JP H06158148A JP 30706192 A JP30706192 A JP 30706192A JP 30706192 A JP30706192 A JP 30706192A JP H06158148 A JPH06158148 A JP H06158148A
- Authority
- JP
- Japan
- Prior art keywords
- oil
- quenching oil
- quenching
- cooler
- valve
- 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.)
- Granted
Links
Landscapes
- Heat Treatment Of Articles (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、鋼材部品を焼入れ処理
するために用いられる焼入油槽内の焼入油を冷却するた
めの焼入油の冷却装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a quenching oil cooling device for cooling quenching oil in a quenching oil tank used for quenching steel parts.
【０００２】[0002]
【従来の技術】鋼材部品は、Ａ1 点（７２７℃）以上に
加熱されてオーステナイト状態とされ、それから急冷さ
れることによりマルテンサイト状態とされて硬度が飛躍
的に高くなる。このようにオーステナイト化した鋼材
を、急冷してマルテンサイト化させて、鋼材の硬度を高
める処理を焼入れ処理という。この焼入処理において、
鋼材の焼入硬化挙動は、その鋼材の焼入性（硬化能）、
鋼材の大きさ（質量）、及び冷却速度（冷却剤の冷却
能）によって支配される。なお、前記冷却剤としては、
従来より、水や、水より沸点が高く冷却能が小さい油が
用いられている。2. Description of the Related Art Steel parts are heated to an A 1 point (727 ° C.) or higher to be in an austenite state, and then rapidly cooled to be in a martensite state and the hardness thereof is remarkably increased. The process of quenching the austenitized steel material to make it into martensite and increasing the hardness of the steel material is called quenching treatment. In this quenching process,
The quench hardening behavior of a steel material is the hardenability (hardenability) of that steel material,
It is governed by the size (mass) of the steel material and the cooling rate (cooling capacity of the coolant). As the coolant,
Conventionally, water and oil having a higher boiling point and a lower cooling capacity than water have been used.
【０００３】ここで、オーステナイト化された鋼材を油
槽中に浸漬して急冷する場合、油槽内の焼入油を所定の
温度に調節して、焼入油の冷却能を調節する必要があ
る。このため、焼入油槽には、冷却水が供給されるオイ
ルクーラーと、焼入油槽に接続されオイルクーラー内を
通過する焼入油の循環管路と、この循環管路を介して焼
入油槽から焼入油を該オイルクーラー内に送り込むとと
もに冷却された焼入油を前記焼入油槽内に戻すポンプと
を有する冷却装置が一般に備えられている。この焼入油
の冷却装置では、焼入油槽中の油温度に応じてポンプを
作動し、焼入油槽中の焼入油を冷却水が供給されるオイ
ルクーラー内を通過させ、この冷却された焼入油を焼入
油槽中に戻すことにより、焼入油槽中の焼入油を所定の
温度に調節する。Here, when the austenitized steel material is immersed in an oil tank for rapid cooling, it is necessary to adjust the quenching oil in the oil tank to a predetermined temperature to adjust the cooling ability of the quenching oil. Therefore, an oil cooler to which cooling water is supplied, a quench oil circulation line connected to the quench oil tank and passing through the oil cooler, and a quench oil tank via this circulation line are provided in the quench oil tank. A cooling device having a pump for feeding quenching oil into the oil cooler and returning the cooled quenching oil into the quenching oil tank is generally provided. In this quenching oil cooling device, the pump is operated according to the oil temperature in the quenching oil tank, and the quenching oil in the quenching oil tank is passed through the oil cooler to which the cooling water is supplied to cool it. By returning the quenching oil into the quenching oil tank, the quenching oil in the quenching oil tank is adjusted to a predetermined temperature.
【０００４】[0004]
【発明が解決しようとする課題】ところで、近年におい
ては、上記したような油焼入れ処理を減圧下で行うこと
がなされている。これは、油面圧を下げることにより、
焼入油の蒸発性を変化させ、これにより焼入歪の低減や
焼入硬さの向上を図るものである。つまり、焼入油の冷
却過程は、蒸気膜段階、沸騰段階、及び対流段階の３つ
の段階に順に分けられる。そして、油面圧が下がれば、
焼入油の蒸気圧の上昇により蒸気膜の発生量が多くなっ
て、処理材の周囲が蒸気膜で包まれて冷却速度が遅くな
る蒸気膜段階が長くなる。このため、急冷による熱応力
の発生を抑えることができ、熱応力に起因する焼入歪み
を抑制することができる。また、油面圧が下がれば、焼
入油の沸点が低下するので、冷却速度が非常に速い沸騰
段階が低温側に持ち越されるようになり、より完全に硬
化させることができる。したがって、減圧下での油焼入
れにより、焼入歪みの発生を抑えるとともに、焼入硬化
を向上させることが可能となる。By the way, in recent years, the oil quenching treatment as described above is performed under reduced pressure. This is because by reducing the oil surface pressure,
The evaporation property of the quenching oil is changed to reduce quenching strain and improve quenching hardness. That is, the quenching oil cooling process is divided into three stages, that is, a vapor film stage, a boiling stage, and a convection stage. And if the oil surface pressure drops,
As the vapor pressure of the quenching oil increases, the amount of vapor film generated increases, and the vapor film stage in which the periphery of the treated material is covered with the vapor film and the cooling rate becomes slow becomes longer. Therefore, it is possible to suppress the occurrence of thermal stress due to rapid cooling, and it is possible to suppress quenching strain due to thermal stress. Further, when the oil surface pressure is lowered, the boiling point of the quenching oil is lowered, so that the boiling stage in which the cooling rate is very fast is carried over to the low temperature side, and the hardening can be completed more completely. Therefore, it is possible to suppress the occurrence of quenching strain and improve quench hardening by oil quenching under reduced pressure.
【０００５】ところが減圧下で焼入れ処理する場合に、
上記した焼入油の冷却装置において、キャビテーション
を防止するために、油圧面が減圧下にある時はクーラー
ポンプを停止させなければならない。なお、キャビテー
ションとは、流動している液体の圧力が局部的に低下し
て飽和蒸気圧又は空気分離圧に達することにより、蒸気
が発生したり又は溶解空気が分離したりして、気泡が生
じる現象をいい、気泡が崩壊すると局部的に超高圧を生
じ、騒音発生等の原因となる。However, when quenching under reduced pressure,
In the quenching oil cooling device described above, in order to prevent cavitation, the cooler pump must be stopped when the hydraulic surface is under reduced pressure. Note that cavitation means that when the pressure of a flowing liquid locally decreases to reach saturated vapor pressure or air separation pressure, vapor is generated or dissolved air is separated, and bubbles are generated. When a bubble collapses, it produces a super high pressure locally and causes noise.
【０００６】そして、上記クーラーポンプの停止状態に
おいては、もしオイルクーラー内の循環管路に穴等の欠
陥が発生すると、オイルクーラー内の焼入油の循環管路
中にクーラーポンプによる圧力がかかっていないので、
オイルクーラーの水が該循環管路内に侵入して焼入油中
に混入し、焼入油が所望の焼入性能を示さなくなるとい
うおそれがある。In the stopped state of the cooler pump, if a defect such as a hole occurs in the circulation pipe in the oil cooler, pressure from the cooler pump is applied to the quench oil circulation pipe in the oil cooler. Not so
There is a possibility that the water of the oil cooler may enter the circulation pipe and mix into the quenching oil, and the quenching oil may not exhibit the desired quenching performance.
【０００７】本発明は上記実情に鑑みてなされたもので
あり、上記クーラーポンプの停止時に、たとえ上記オイ
ルクーラー内の循環管路に穴等の欠陥が発生してもオイ
ルクーラー内の水が循環管路内に侵入して焼入油中に混
入することがなく、したがって焼入油の焼入性能を好適
に維持することのできる焼入油の冷却装置を提供するこ
とを目的とするものである。The present invention has been made in view of the above circumstances, and when the cooler pump is stopped, water in the oil cooler circulates even if a defect such as a hole occurs in the circulation line in the oil cooler. An object of the present invention is to provide a quenching oil cooling device that does not enter the pipeline and mix into the quenching oil, and therefore can maintain the quenching performance of the quenching oil appropriately. is there.
【０００８】[0008]
【課題を解決するための手段】上記課題を解決する本発
明の焼入油の冷却装置は、冷却水が供給されるオイルク
ーラーと、前記オイルクーラー内を通過し、その流入部
及び流出部が焼入油槽に接続された焼入油の循環管路
と、前記循環管路の前記流入部及び流出部にそれぞれ設
けられた流入弁及び流出弁と、前記循環管路に設けら
れ、前記循環管路を介して前記焼入油槽から前記オイル
クーラー内へ焼入油を送り込むとともに前記オイルクー
ラー内で冷却された焼入油を前記焼入油槽へ戻すクーラ
ーポンプと、前記循環管路に接続され、前記オイルクー
ラー内を通過する前記循環管路内の焼入油を加圧する加
圧機構とを備えていることを特徴とするものである。A quenching oil cooling apparatus according to the present invention which solves the above-mentioned problems has an oil cooler to which cooling water is supplied and an oil cooler which passes through the oil cooler and has an inflow portion and an outflow portion. A quench oil circulation line connected to a quench oil tank, an inflow valve and an outflow valve respectively provided in the inflow part and the outflow part of the circulation line, and the circulation line provided in the circulation line. A cooler pump that sends quenching oil from the quenching oil tank into the oil cooler through a passage and returns the quenching oil cooled in the oil cooler to the quenching oil tank, and is connected to the circulation line, And a pressurizing mechanism for pressurizing the quenching oil in the circulation pipe passing through the oil cooler.
【０００９】[0009]
【作用】本発明の焼入油の冷却装置は、焼入油槽の油面
圧が常圧の状態では、以下のように作動する。つまり、
焼入油槽内の焼入油を冷却する必要が生じた時、オイル
クーラーに冷却水を供給し、かつ、循環管路の流入部及
び流出部に設けられた流入弁及び流出弁を開いた状態
で、クーラーポンプを運転させる。これにより、焼入油
槽内の焼入油は、循環管路を介してオイルクーラー内へ
送り込まれ、オイルクーラーに供給された冷却水で冷却
される。そして、オイルクーラー内で冷却された焼入油
は、循環管路を介して焼入油槽へ戻されて、焼入油槽内
の焼入油の温度が低下される。そして、焼入油槽内の焼
入油を冷却する必要がなくなれば、オイルクーラーへの
冷却水の供給を止める。この時、クーラーポンプは運転
を続けるので、オイルクーラー内を通過する循環管路内
の焼入油には常時圧力がかかっている状態となる。The quenching oil cooling device of the present invention operates as follows when the oil surface pressure of the quenching oil tank is normal pressure. That is,
When it becomes necessary to cool the quenching oil in the quenching oil tank, the cooling water is supplied to the oil cooler, and the inflow and outflow valves provided at the inflow and outflow parts of the circulation pipeline are open. Then, operate the cooler pump. As a result, the quenching oil in the quenching oil tank is sent into the oil cooler via the circulation pipe and cooled by the cooling water supplied to the oil cooler. Then, the quenching oil cooled in the oil cooler is returned to the quenching oil tank through the circulation pipe, and the temperature of the quenching oil in the quenching oil tank is lowered. Then, when it becomes unnecessary to cool the quenching oil in the quenching oil tank, the supply of the cooling water to the oil cooler is stopped. At this time, since the cooler pump continues to operate, the quenching oil in the circulation line passing through the oil cooler is always under pressure.
【００１０】一方、焼入油槽の油圧面を減圧する時は、
キャビテーションを防止するために、循環管路の流入部
及び流出部に設けられた流入弁及び流出弁を閉じ、か
つ、クーラーポンプの運転を停止する。そして、加圧機
構を作動させて、オイルクーラー内を通過する循環管路
内の焼入油を加圧する。なお、この時オイルクーラーに
冷却水が供給され続けていれば、この冷却水の圧力より
も高い圧力で焼入油を加圧する。On the other hand, when depressurizing the hydraulic surface of the quenching oil tank,
In order to prevent cavitation, the inflow valve and the outflow valve provided in the inflow part and the outflow part of the circulation line are closed, and the operation of the cooler pump is stopped. Then, the pressurizing mechanism is operated to pressurize the quenching oil in the circulation pipeline passing through the oil cooler. If the cooling water is continuously supplied to the oil cooler at this time, the quenching oil is pressurized at a pressure higher than the pressure of the cooling water.
【００１１】このように、本発明の焼入油の冷却装置で
は、オイルクーラー内を通過する循環管路内の焼入油の
圧力は、常に冷却水の圧力よりも高く維持され、たとえ
オイルクーラー内の循環管路に穴等の欠陥が発生して
も、水が循環管路内に侵入して焼入油中に混入すること
はなく、水の混入による焼入油の焼入性能の低下等を抑
えることができる。As described above, in the quenching oil cooling device of the present invention, the pressure of the quenching oil in the circulation passage passing through the oil cooler is always maintained higher than the pressure of the cooling water, and even if the oil cooler is used. Even if a defect such as a hole occurs in the internal circulation pipe, water will not enter the circulation pipe and mix into the quenching oil, and the quenching performance of the quenching oil will deteriorate due to the mixing of water. Etc. can be suppressed.
【００１２】[0012]
【実施例】以下、実施例により具体的に説明する。図１
の模式図に示すように、焼入油槽１には循環管路２が接
続され、この循環管路２は、焼入油槽１に流入する流入
部２ａ、及び焼入油槽１から流出する流出部２ｂを有し
ている。循環管路２には、流出部２ｂから流入部２ａに
向かって順に、つまり上流側から下流側に向かって順
に、電磁弁（電磁作用により開閉が制御される電磁切換
弁、以下同様）よりなる流出弁３、脈動吸収のための第
１フレキシブルホース４、焼入油中の固形不純物を除去
するためのストレーナ機構５、クーラーポンプ６、オイ
ルクーラー７、電磁弁よりなるクーラー出口弁８、第２
フレキシブルホース９、電磁弁よりなる流入弁１０が設
けられている。なお、上記ストレーナ機構５は、ストレ
ーナ５１と、その前後に設けられた弁５２、５３と、弁
５４を有するバイパス５５とからなる。通常時、弁５
２、５３は開き、バイパス５５に設けられた弁５４は閉
じており、ストレーナ５１のメンテナンス時に弁５２、
５３、５４の開閉が逆になる。EXAMPLES The present invention will be specifically described below with reference to examples. Figure 1
As shown in the schematic diagram of FIG. 1, a circulation pipeline 2 is connected to the quenching oil tank 1, and the circulation pipeline 2 has an inflow portion 2 a that flows into the quenching oil tank 1 and an outflow portion that flows out from the quenching oil tank 1. 2b. The circulation line 2 is composed of an electromagnetic valve (an electromagnetic switching valve whose opening and closing is controlled by electromagnetic action, and so on) in order from the outflow portion 2b to the inflow portion 2a, that is, from the upstream side to the downstream side. Outflow valve 3, first flexible hose 4 for absorbing pulsation, strainer mechanism 5 for removing solid impurities in quenching oil, cooler pump 6, oil cooler 7, cooler outlet valve 8 including a solenoid valve, second
A flexible hose 9 and an inflow valve 10 including a solenoid valve are provided. The strainer mechanism 5 includes a strainer 51, valves 52 and 53 provided before and after the strainer 51, and a bypass 55 having a valve 54. Normally, valve 5
2, 53 are open, the valve 54 provided in the bypass 55 is closed, and when the strainer 51 is maintained, the valve 52,
The opening and closing of 53 and 54 are reversed.
【００１３】オイルクーラー７では、冷却水供給装置７
１から冷却水供給管路７２を介して熱交換器（図示しな
い）に冷却水が供給され、この冷却水は排水管路７３を
介して外部に排出される。なお、冷却水供給装置７１か
ら熱交換器への冷却水の供給は、冷却水供給管路７２に
設けられた電磁弁よりなる冷却水入口弁７４により制御
される。また、オイルクーラー７内の冷却水圧力は（１
〜１．５ｋｇ／ｃｍ2）に設定されている。In the oil cooler 7, the cooling water supply device 7
1, the cooling water is supplied to the heat exchanger (not shown) via the cooling water supply pipe 72, and the cooling water is discharged to the outside via the drainage pipe 73. The supply of the cooling water from the cooling water supply device 71 to the heat exchanger is controlled by the cooling water inlet valve 74 which is an electromagnetic valve provided in the cooling water supply pipe 72. The cooling water pressure in the oil cooler 7 is (1
~1.5kg / cm 2 is set to).
【００１４】上記オイルクーラー７の前後の循環管路２
で、上記クーラーポンプ６とオイルクーラー７との間、
及び上記クーラー出口弁８と第２フレキシブルホース９
との間には、弁１１が設けられたバイパス管路１２が接
続されている。また、循環管路２の第２フレキシブルホ
ース９と流入弁１０との間には加圧機構２０の加圧管路
２１が接続されている。この加圧機構２０は、いわゆる
油圧−空気圧式蓄圧器よりなり、電磁弁よりなるアキュ
ムレートタンク出口弁２２が設けられた加圧管路２１
と、アキュムレートタンク２３と、電磁弁よりなる通気
弁２４が設けられ大気に通じる通気管路２５と、電磁弁
よりなるアキュムレートタンク入口弁２６が設けられＮ
2 ガス供給装置２７に接続されたガス供給管路２８とか
ら構成されている。上記アキュムレートタンク２３内に
は、焼入油槽１内の焼入油と同じ焼入油が貯溜されてお
り、また上記Ｎ2 ガス供給装置２７は２〜３ｋｇ／ｃｍ
2 の圧力でＮ2 ガスを供給する。Circulation lines 2 before and after the oil cooler 7
Then, between the cooler pump 6 and the oil cooler 7,
And the cooler outlet valve 8 and the second flexible hose 9
A bypass line 12 provided with a valve 11 is connected between and. A pressurizing pipe 21 of the pressurizing mechanism 20 is connected between the second flexible hose 9 of the circulation pipe 2 and the inflow valve 10. The pressurizing mechanism 20 is composed of a so-called hydraulic-pneumatic pressure accumulator, and has a pressurizing conduit 21 provided with an accumulating tank outlet valve 22 including an electromagnetic valve.
An accumulation tank 23, a ventilation valve 24 formed of a solenoid valve and a ventilation pipe line 25 communicating with the atmosphere, and an accumulation tank inlet valve 26 formed of a solenoid valve.
The gas supply line 28 is connected to the two- gas supply device 27. In the accumulation tank 23, the same quenching oil as the quenching oil in the quenching oil tank 1 is stored, and the N 2 gas supply device 27 is 2 to 3 kg / cm.
Supplying a N 2 gas at a second pressure.
【００１５】なお、焼入油槽１内には、油面圧を測定す
る真空計３１及び焼入油の温度を測定する温度計３２が
設置され、これらの信号を受けた制御部３０により、上
記流出弁３、流入弁１０、冷却水入口弁７４、クーラー
出口弁８、加圧機構２０のアキュムレートタンク出口弁
２２、通気弁２４及びアキュムレートタンク入口弁２６
の開閉、並びにクーラーポンプ６の作動が制御される。In the quenching oil tank 1, a vacuum gauge 31 for measuring the oil surface pressure and a thermometer 32 for measuring the temperature of the quenching oil are installed. Outflow valve 3, inflow valve 10, cooling water inlet valve 74, cooler outlet valve 8, accumulating tank outlet valve 22 of pressurizing mechanism 20, vent valve 24 and accumulating tank inlet valve 26.
And the operation of the cooler pump 6 are controlled.
【００１６】本実施例の焼入油の冷却装置は、焼入油槽
１の油面圧が常圧の状態では、以下のように作動する。
つまり、焼入油槽１内の焼入油の温度が設定値以上にな
り、同焼入油を冷却する必要が生じた時、温度計３２か
らの信号を受けた制御部３０が、冷却水供給管路７２に
設けられた冷却水入口弁７４を開いてオイルクーラー７
に冷却水を供給し、循環管路２の流入部２ａ及び流出部
２ｂに設けられた流入弁１０及び流出弁３を開き、クー
ラー出口弁８を開き、この状態でクーラーポンプ６を作
動させる。なお、このとき真空計３１からの信号を受け
た制御部３０の制御により、加圧機構２０のアキュムレ
ートタンク出口弁２２及び入口弁２６は閉じ、かつ、通
気弁２４は開いた状態となっている。これにより、焼入
油槽１内の焼入油は、循環管路２を介してオイルクーラ
ー６内へ送り込まれ、オイルクーラー６に供給された冷
却水で冷却される。そして、オイルクーラー６内で冷却
された焼入油は、循環管路２を介して焼入油槽１へ戻さ
れて、焼入油槽１内の焼入油の温度が低下される。The quenching oil cooling device of this embodiment operates as follows when the oil surface pressure of the quenching oil tank 1 is normal pressure.
That is, when the temperature of the quenching oil in the quenching oil tank 1 becomes equal to or higher than the set value and it becomes necessary to cool the quenching oil, the control unit 30 receiving a signal from the thermometer 32 supplies the cooling water. The cooling water inlet valve 74 provided in the pipe 72 is opened to open the oil cooler 7.
Cooling water is supplied to the inflow valve 2 and the outflow valve 3 provided in the inflow portion 2a and the outflow portion 2b of the circulation pipe 2, the cooler outlet valve 8 is opened, and the cooler pump 6 is operated in this state. At this time, under the control of the control unit 30 which receives a signal from the vacuum gauge 31, the accumulation tank outlet valve 22 and the inlet valve 26 of the pressurizing mechanism 20 are closed and the ventilation valve 24 is opened. There is. As a result, the quenching oil in the quenching oil tank 1 is sent into the oil cooler 6 via the circulation pipe line 2 and cooled by the cooling water supplied to the oil cooler 6. Then, the quenching oil cooled in the oil cooler 6 is returned to the quenching oil tank 1 via the circulation pipe line 2, and the temperature of the quenching oil in the quenching oil tank 1 is lowered.
【００１７】そして、焼入油槽１内の焼入油の温度が設
定値以下となり、同焼入油を冷却する必要がなくなれ
ば、温度計３２からの信号を受けた制御部３０が、冷却
水供給管路７２に設けられた冷却水入口弁７４を閉じて
オイルクーラー７への冷却水の供給を止め、クーラー出
口弁８を閉じる。これにより、焼入油槽１内の焼入油は
循環管路２及びバイパス管路１２を介して循環し、また
オイルクーラー７内を通過する循環管路２内の焼入油に
は常時圧力がかかっている状態となる。When the temperature of the quenching oil in the quenching oil tank 1 becomes lower than the set value and it is no longer necessary to cool the quenching oil, the control unit 30 receiving a signal from the thermometer 32 causes the cooling water to cool. The cooling water inlet valve 74 provided in the supply pipeline 72 is closed to stop the supply of the cooling water to the oil cooler 7, and the cooler outlet valve 8 is closed. As a result, the quenching oil in the quenching oil tank 1 circulates through the circulation pipeline 2 and the bypass pipeline 12, and the quenching oil in the circulation pipeline 2 passing through the oil cooler 7 is always under pressure. It will be in a state of hanging.
【００１８】一方、焼入油槽１の油圧面を減圧する時
は、以下のように作動する。つまり、焼入油槽１内の油
面圧が減圧されて設定値以下になった時、真空計３１か
らの信号を受けた制御部３０が、クーラーポンプ６の運
転を停止し、循環管路２の流入部２ａ及び流出部２ｂに
設けられた流入弁１０及び流出弁３を閉じ、クーラー出
口弁８を開き、加圧機構２０のアキュムレートタンク出
口弁２２及び入口弁２６を開き、通気弁２４を閉じる。
なおこの時、冷却水入口弁７４は開いており、オイルク
ーラー７には冷却水が供給されている。これにより、ガ
ス供給装置２７からのＮ2 ガスによりアキュムレートタ
ンク２３が加圧され、この圧力が加圧管路２１を介して
循環管路２に加わり、循環管路２中の焼入油が加圧され
る。On the other hand, when depressurizing the hydraulic surface of the quenching oil tank 1, it operates as follows. That is, when the oil surface pressure in the quenching oil tank 1 is reduced and becomes equal to or lower than the set value, the control unit 30 that receives a signal from the vacuum gauge 31 stops the operation of the cooler pump 6 and the circulation line 2 The inflow valve 10 and the outflow valve 3 provided in the inflow part 2a and the outflow part 2b of the air conditioner are closed, the cooler outlet valve 8 is opened, the accumulated tank outlet valve 22 and the inlet valve 26 of the pressurizing mechanism 20 are opened, and the vent valve 24 Close.
At this time, the cooling water inlet valve 74 is open, and the cooling water is being supplied to the oil cooler 7. As a result, the N 2 gas from the gas supply device 27 pressurizes the accumulation tank 23, and this pressure is applied to the circulation pipeline 2 via the pressurization pipeline 21, and the quenching oil in the circulation pipeline 2 is added. Is pressed.
【００１９】このように、本実施例の焼入油の冷却装置
では、オイルクーラー７内を通過する循環管路２内の焼
入油の圧力は、常に冷却水の圧力よりも高く維持され、
たとえオイルクーラー７内の循環管路２に穴等の欠陥が
発生しても、水が循環管路２内に侵入して焼入油中に混
入することはなく、水の混入による焼入油の焼入性能の
低下等を抑えることができる。したがって、焼入油槽内
の焼入油の長寿命化に貢献する。As described above, in the quenching oil cooling apparatus of this embodiment, the pressure of the quenching oil in the circulation line 2 passing through the oil cooler 7 is always maintained higher than the pressure of the cooling water,
Even if a defect such as a hole occurs in the circulation pipe line 2 in the oil cooler 7, water does not enter the circulation pipe line 2 and mix into the quenching oil. It is possible to suppress deterioration of the quenching performance. Therefore, it contributes to extending the life of the quenching oil in the quenching oil tank.
【００２０】なお、上記実施例において、循環管路２の
流出部２ｂに設けられる流出弁３を、電磁弁の代わりに
逆止弁とすることもできる。また、本発明の加圧機構と
しては、上記実施例ではいわゆる油圧−空気圧式蓄圧器
を採用したが、これに限定されず、他の加圧手段、例え
ば薄肉のステンレス、ビニール等の伸縮可能なジャバラ
管を循環管路２の任意の位置に配設する手段も採用する
ことが可能である。このものでは、油圧面の減圧時に、
ジャバラ管が縮小し、この体積の縮小分だけ循環管路内
の焼入油を加圧することができる。In the above embodiment, the outflow valve 3 provided in the outflow portion 2b of the circulation line 2 may be a check valve instead of the solenoid valve. Further, as the pressurizing mechanism of the present invention, a so-called hydraulic-pneumatic accumulator is adopted in the above-mentioned embodiment, but the present invention is not limited to this, and other pressurizing means such as thin-walled stainless steel or vinyl can be expanded and contracted. It is also possible to employ means for disposing the bellows pipe at an arbitrary position in the circulation conduit 2. With this, when depressurizing the hydraulic surface,
The bellows pipe is reduced, and the quenching oil in the circulation pipe can be pressurized by the reduced volume.
【００２１】[0021]
【発明の効果】以上詳述したように本発明の焼入油の冷
却装置は、オイルクーラー内を通過する循環管路内の焼
入油の圧力を常に冷却水の圧力よりも高く維持すること
ができ、たとえオイルクーラー内の循環管路に穴等の欠
陥が発生しても、水が循環管路内に侵入して焼入油中に
混入することはなく、水の混入による焼入油の焼入性能
の低下等を抑えることができる。したがって、焼入油槽
内の焼入油の長寿命化に貢献することができる。As described in detail above, in the quenching oil cooling apparatus of the present invention, the pressure of the quenching oil in the circulation pipe passing through the oil cooler is always maintained higher than the pressure of the cooling water. Even if a defect such as a hole occurs in the circulation pipe in the oil cooler, water will not enter the circulation pipe and mix into the quenching oil. It is possible to suppress deterioration of the quenching performance. Therefore, it is possible to contribute to extending the life of the quenching oil in the quenching oil tank.
【図１】本実施例に係る焼入油の冷却装置を説明する模
式図である。FIG. 1 is a schematic diagram illustrating a quenching oil cooling device according to an embodiment.
１…焼入油槽 ２…循環管路 ２ａ…
流入部 ２ｂ…流出部 ３…流出弁 ６
…クーラーポンプ ７…オイルクーラー １０…流入弁 ２０…
加圧機構1 ... Quenching oil tank 2 ... Circulating pipeline 2a ...
Inflow section 2b ... Outflow section 3 ... Outflow valve 6
… Cooler pump 7… Oil cooler 10… Inflow valve 20…
Pressure mechanism
フロントページの続き (72)発明者 藤原 康之 愛知県豊田市トヨタ町１番地 トヨタ自動 車株式会社内 (72)発明者 小川 三郎 大阪市西区京町堀２丁目４番７号 中外炉 工業株式会社内 (72)発明者 船本 裕治 大阪市西区京町堀２丁目４番７号 中外炉 工業株式会社内 (72)発明者 金子 保 大阪市西区京町堀２丁目４番７号 中外炉 工業株式会社内Front Page Continuation (72) Inventor Yasuyuki Fujiwara 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Corporation (72) Inventor Saburo Ogawa 2-4-7 Kyomachibori, Nishi-ku, Osaka City Chugai Furnace Industry Co., Ltd. ( 72) Inventor Yuji Funamoto 2-4-7 Kyomachibori, Nishi-ku, Osaka City Chugai Furnace Industry Co., Ltd. (72) Inventor Kaho Kagohori 2-4-7, Kyomachibori Nishi-shi, Osaka City Chugai Furnace Industry Co., Ltd.
Claims (1)
が焼入油槽に接続された焼入油の循環管路と、 前記循環管路の前記流入部及び流出部にそれぞれ設けら
れた流入弁及び流出弁と、 前記循環管路に設けられ、前記循環管路を介して前記焼
入油槽から前記オイルクーラー内へ焼入油を送り込むと
ともに前記オイルクーラー内で冷却された焼入油を前記
焼入油槽へ戻すクーラーポンプと、 前記循環管路に接続され、前記オイルクーラー内を通過
する前記循環管路内の焼入油を加圧する加圧機構とを備
えていることを特徴とする焼入油の冷却装置。1. An oil cooler to which cooling water is supplied, a quench oil circulation passage that passes through the oil cooler and has its inflow portion and outflow portion connected to a quench oil tank, and the circulation passage. An inflow valve and an outflow valve respectively provided in the inflow part and the outflow part, and provided in the circulation pipeline, and sends quenching oil from the quenching oil tank into the oil cooler through the circulation pipeline. A cooler pump for returning the quenching oil cooled in the oil cooler to the quenching oil tank, and a pressurizer for pressurizing the quenching oil in the circulation pipeline that is connected to the circulation pipeline and passes through the oil cooler. A quenching oil cooling device comprising a pressure mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4307061A JP3014878B2 (en) | 1992-11-17 | 1992-11-17 | Quenching oil cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4307061A JP3014878B2 (en) | 1992-11-17 | 1992-11-17 | Quenching oil cooling system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06158148A true JPH06158148A (en) | 1994-06-07 |
| JP3014878B2 JP3014878B2 (en) | 2000-02-28 |
Family
ID=17964575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4307061A Expired - Lifetime JP3014878B2 (en) | 1992-11-17 | 1992-11-17 | Quenching oil cooling system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3014878B2 (en) |
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|---|---|---|---|---|
| JP2007051332A (en) * | 2005-08-18 | 2007-03-01 | Koyo Thermo System Kk | Hardening device, and method for recovering exhaust heat of coolant |
| CN103045822A (en) * | 2012-12-19 | 2013-04-17 | 苏州工业园区姑苏科技有限公司 | Automatic oil supplementing control device of oil groove |
| JP2017043839A (en) * | 2015-08-24 | 2017-03-02 | Ｊｆｅスチール株式会社 | Water hardening device, continuous annealing equipment, and method for producing steel sheet |
| WO2018123246A1 (en) * | 2016-12-28 | 2018-07-05 | 株式会社Ihi | Heat treatment apparatus |
| CN108441603A (en) * | 2018-06-07 | 2018-08-24 | 温州三连汽车零部件有限公司 | Waste heat quenching device after forging |
| CN109278342A (en) * | 2018-09-10 | 2019-01-29 | 中国工程物理研究院化工材料研究所 | It is a kind of to realize the System and method for controllably to cool down in warm isostatic pressing machine cylinder |
| WO2019111591A1 (en) * | 2017-12-06 | 2019-06-13 | 株式会社Ihi | Heat treatment device |
| CN110791632A (en) * | 2019-12-20 | 2020-02-14 | 南京天马轴承有限公司 | Novel roller quenching groove recirculated cooling water energy-saving control device |
| CN116875796A (en) * | 2023-07-14 | 2023-10-13 | 巩义市恒铭金属制品有限公司 | Oil temperature control device for quenching of spring steel wire |
-
1992
- 1992-11-17 JP JP4307061A patent/JP3014878B2/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007051332A (en) * | 2005-08-18 | 2007-03-01 | Koyo Thermo System Kk | Hardening device, and method for recovering exhaust heat of coolant |
| CN103045822A (en) * | 2012-12-19 | 2013-04-17 | 苏州工业园区姑苏科技有限公司 | Automatic oil supplementing control device of oil groove |
| JP2017043839A (en) * | 2015-08-24 | 2017-03-02 | Ｊｆｅスチール株式会社 | Water hardening device, continuous annealing equipment, and method for producing steel sheet |
| WO2018123246A1 (en) * | 2016-12-28 | 2018-07-05 | 株式会社Ihi | Heat treatment apparatus |
| CN109689900A (en) * | 2016-12-28 | 2019-04-26 | 株式会社Ihi | Annealing device |
| WO2019111591A1 (en) * | 2017-12-06 | 2019-06-13 | 株式会社Ihi | Heat treatment device |
| JPWO2019111591A1 (en) * | 2017-12-06 | 2020-04-02 | 株式会社Ihi | Heat treatment equipment |
| CN108441603A (en) * | 2018-06-07 | 2018-08-24 | 温州三连汽车零部件有限公司 | Waste heat quenching device after forging |
| CN109278342A (en) * | 2018-09-10 | 2019-01-29 | 中国工程物理研究院化工材料研究所 | It is a kind of to realize the System and method for controllably to cool down in warm isostatic pressing machine cylinder |
| CN110791632A (en) * | 2019-12-20 | 2020-02-14 | 南京天马轴承有限公司 | Novel roller quenching groove recirculated cooling water energy-saving control device |
| CN116875796A (en) * | 2023-07-14 | 2023-10-13 | 巩义市恒铭金属制品有限公司 | Oil temperature control device for quenching of spring steel wire |
| CN116875796B (en) * | 2023-07-14 | 2024-03-19 | 巩义市恒铭金属制品有限公司 | Oil temperature control device for quenching of spring steel wire |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3014878B2 (en) | 2000-02-28 |
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