JPH08197157A - Cooling system for hydraulic locking device of die cushion of press - Google Patents

Cooling system for hydraulic locking device of die cushion of press

Info

Publication number
JPH08197157A
JPH08197157A JP7037480A JP3748095A JPH08197157A JP H08197157 A JPH08197157 A JP H08197157A JP 7037480 A JP7037480 A JP 7037480A JP 3748095 A JP3748095 A JP 3748095A JP H08197157 A JPH08197157 A JP H08197157A
Authority
JP
Japan
Prior art keywords
oil
working fluid
cooler
cooling water
oil cooler
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
Application number
JP7037480A
Other languages
Japanese (ja)
Inventor
Kazuo Sato
和夫 佐藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to JP7037480A priority Critical patent/JPH08197157A/en
Publication of JPH08197157A publication Critical patent/JPH08197157A/en
Pending legal-status Critical Current

Links

Landscapes

  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Presses And Accessory Devices Thereof (AREA)
  • Press Drives And Press Lines (AREA)

Abstract

PURPOSE: To reduce the volume of the working fluid (the tank capacity), and to prevent the deterioration of the working fluid and the packing by providing an oil cooler in a hydraulic circuit of a locking device, and keeping appropriate temperature of the working fluid. CONSTITUTION: An oil cooler 7 for cooling the working fluid is provided in the hydraulic circuit to connect an oil chamber 14 of a locking cylinder 3 to an operation cylinder 4 through an oil flow rate adjusting valve 5. This cooler 7 is of multi-tube heat exchanger consisting of stainless steel high pressure tubes, runs oil inside the tubes while it runs the cooling water outside the tubes, and is provided with a plurality of blind plugs for cleaning in upper and lower parts. A stop valve is preferably provided on the inlet side of the cooling water to control the temperature rise of the oil. Because the temperature of the working fluid reaches 80-90 deg.C while a press is operated, and the working fluid is of the pulse intermittent flow of 6-8 shots/min. where the pressure is dropped from 60-70kg/cm<2> to 1.3-1.5kg/cm<2> instantaneously, the maximum proof pressure of the oil cooler 7 is preferably 230kg/cm<2> .

Description

【発明の詳細な説明】Detailed Description of the Invention

【産業上の利用分野】この発明は、プレス機に具備され
るロッキングオイルの高圧オイルの圧力低下による温度
上昇を防止し、最適油温30〜35℃に保持できるシス
テムである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a system capable of preventing a temperature rise due to a pressure drop of high-pressure oil of rocking oil provided in a press machine and maintaining an optimum oil temperature of 30 to 35 ° C.

【従来の技術】プレス機械のダイクッション装置は、成
形品の絞り加工時のしわの防止として空気圧を利用す
る。ロッキング装置は成形後のダイクッションの上昇時
の型内の製品に影響を与えないように、上昇速度をコン
トロールしたり、遅らせたりするもので、油圧作動で制
御する。図1に空気式ダイクッションを示す。絞り加工
中はパッド1が下降しロッド2には、ピストンがあり、
この下降によって油圧13の圧力降下をし油室14のオ
イルは、ロッキングシリンダーピストン3内のチェック
弁とオペレートシリンダー4開口部を通り、油圧13に
流れる。ロッド分のオイルは、油タンク6のほうに流れ
てつりあう。下死点直前にオペレートシリンダー4が閉
じてロッキングシリンダーピストン3の中のチェック弁
を通り油室13に入る。スライドが下死点を通り上昇に
変わると、圧縮空気室Cの力でパッド1を押し上げ、こ
れと一体のロッドを介してピストン3が油室13の油に
圧力をかける。油室13のオイルはオペレートシリンダ
ー4により閉じて密閉されており、圧力が発生し、ダイ
クッションパッド1の上昇を妨げている。下死点で停止
したままになっている状態をロッキングという。ロッキ
ングの解放は、オペレートシリンダー4の戻りにより開
口部が解放し、スピードコントロール5を通過後、圧力
降下により、熱が発生する。よって、冷却する必要があ
る。冷却はロッキング外壁又はオイル別置タンクの壁を
空冷にたよっていた。図−4、図−5参照。又、従来の
設計者は .耐久性、オイルクーラーの考え方がない(オイルクー
ラーの耐圧限度は10kg/cm) .オイルクーラー内の20〜40l/ショットと繰り返
しショットが6〜8ショット/分で充分な冷却不能との
認識があった。
2. Description of the Related Art A die cushion device of a press machine uses air pressure as a wrinkle preventive when drawing a molded product. The locking device controls or raises the rising speed so as not to affect the product in the mold when the die cushion is lifted after molding, and is controlled by hydraulic operation. FIG. 1 shows a pneumatic die cushion. During drawing, the pad 1 descends and the rod 2 has a piston.
This lowering causes the pressure of the hydraulic pressure 13 to drop, and the oil in the oil chamber 14 flows to the hydraulic pressure 13 through the check valve in the locking cylinder piston 3 and the opening of the operating cylinder 4. The oil for the rod flows to the oil tank 6 and is balanced. Immediately before the bottom dead center, the operating cylinder 4 is closed and passes through a check valve in the locking cylinder piston 3 to enter the oil chamber 13. When the slide passes through the bottom dead center and changes to ascend, the pad 1 is pushed up by the force of the compressed air chamber C, and the piston 3 pressurizes the oil in the oil chamber 13 via the rod integral with the pad 1. The oil in the oil chamber 13 is closed and sealed by the operating cylinder 4, pressure is generated, and the rise of the die cushion pad 1 is prevented. The state of being stopped at the bottom dead center is called rocking. To release the locking, the opening is released due to the return of the operating cylinder 4, and after passing through the speed control 5, heat is generated due to the pressure drop. Therefore, it is necessary to cool. For cooling, the rocking outer wall or the oil separate tank wall was subjected to air cooling. See Figure-4 and Figure-5. Also, the conventional designers are: There is no concept of durability and oil cooler (the pressure limit of the oil cooler is 10 kg / cm 2 ). It was recognized that 20 to 40 l / shot in the oil cooler and 6 to 8 repeated shots per minute were insufficient for cooling.

【発明が解決しようとする課題】油タンク又はロッキン
グ装置外壁を通しての空冷方式は、両者とも本体は大型
で使用油も2000lを要し、振動によるトラブルもあ
り、ダイクッション絞り負荷が増大すると、十分な冷却
もできない。オイル許容限度は60℃をはるかにこえ、
80〜90℃となり、オイルやパッキングの寿命を短縮
するトラブルがあった。本発明はこれらの様々のトラブ
ルを解決し、簡単なシステムにより、ダイクッションロ
ッキング装置の油圧冷却を目的とする。
Both of the air-cooling methods through the oil tank or the outer wall of the rocking device have a large body and require 2000 liters of oil to be used, and there are problems due to vibration. I can not cool it. The allowable oil limit is far above 60 ° C,
The temperature was 80 to 90 ° C, and there was a problem of shortening the life of oil and packing. The present invention solves these various problems and aims at hydraulic cooling of a die cushion locking device by a simple system.

【課題を解決するための手段】この目的は小型で使用油
量も従来の10%(200l)で十分対応できる。耐久
性(耐圧、繰り返し圧力、耐振)、保守、メンテナンス
費用、製造コストが低減できる。以下図1によって説
明する。このロッキング冷却油圧システムを設置するこ
とによってロッキングシリンダー油室13のオイルは、
オイルクーラーのチューブ内を通過し、チューブ外の冷
却水によってオイル発熱を吸収し、オイル温度の最適
(30〜35℃)にコントロールすることが出来る。更
に、大型プレス機になると、ダイクッション上昇ストロ
ーク調整機構12を取り付けることになり、機構上保守
上も優位である。
For this purpose, the size is small and the amount of oil used is 10% (200 liters) of the conventional type, which is sufficient. Durability (pressure resistance, repetitive pressure, vibration resistance), maintenance, maintenance costs, and manufacturing costs can be reduced. This will be described below with reference to FIG. By installing this locking cooling hydraulic system, the oil in the locking cylinder oil chamber 13 is
The heat of the oil is absorbed by the cooling water outside the tube after passing through the tube of the oil cooler, and the oil temperature can be controlled to the optimum temperature (30 to 35 ° C). Further, in the case of a large press machine, the die cushion raising stroke adjusting mechanism 12 is attached, which is advantageous in terms of mechanism and maintenance.

【作用】ロッキングシリンダーの油室13のオイルは最
高で60〜70kg/cmの範囲で封じこめられてい
るが、オペレートシリンダー4の戻りによってオイル流
量調整弁5を経て、圧力降下によって発熱(30.00
0〜40.000kcal/HR)し、オイルは昇温す
る。耐久性オイルクーラーのチューブ内を通過すること
によって、昇温オイルは冷却され、ロッキングシリンダ
ー油室14に戻る。
The oil in the oil chamber 13 of the rocking cylinder is contained in the range of 60 to 70 kg / cm 2 at the maximum, but when the operating cylinder 4 returns, the oil flows through the oil flow rate adjusting valve 5 to generate heat (30 .00
0-40.000 kcal / HR), and the temperature of the oil rises. By passing through the tube of the durable oil cooler, the heated oil is cooled and returned to the locking cylinder oil chamber 14.

【実施例】本発明の実施例について、図1、図2、図3
を参考に説明する。オイルクーラーチューブ内を通過す
るオイルは一定のパルス状(圧力、流量)であり、間欠
流である。その圧力も60〜70kg/cmから、瞬
時に1.2〜1.5kg/cmに急速に低下するの
で、ウオータハンマー現象が繰り返し起るため、冷却シ
ステムには厳しい耐久性を要求される。作用周期も6〜
8ショット/分とし、オイルクーラーの耐圧最高230
kg/cmに耐えられるものとした。オイル側の間欠
流に対し、冷却水側は、冷却水流量調整弁11によって
調整され、冷却塔にもどる。
EXAMPLES Examples of the present invention will be described with reference to FIGS.
Will be explained with reference. The oil passing through the oil cooler tube has a constant pulse shape (pressure, flow rate) and is an intermittent flow. From the pressures 60~70kg / cm 2, so instantaneously rapidly reduced to 1.2~1.5kg / cm 2, since occurs repeatedly the water hammer phenomenon, requiring severe durability in cooling system . The action cycle is 6 ~
8 shots / minute, oil cooler withstand pressure up to 230
It should be able to withstand kg / cm 2 . With respect to the intermittent flow on the oil side, the cooling water side is adjusted by the cooling water flow rate adjusting valve 11 and returns to the cooling tower.

【発明の効果】【The invention's effect】

.構造が簡単であるため、設備投資は従来の30%であ
る。 .性能効果も良好(30〜35℃)であるため、油膜、
油温の保証もよく、油の劣化防止、シール の寿命延長
し、スラッジの析出防止となり、ノントラブルを計る。 .油温が最適値であり、スピードコントロールと上限ク
ッション作動もスムーズで製品品質にバラツキが出な
い。 .使用油量も従来の2000lから200lとなり、1
0%の油量で機能を充分に発揮し、コンパクトである。 .ランニングコストは電動ファンも不要でありクーリン
グタワーの冷却水で十分である。 .ダイクッションストローク調整機構との干渉もなく保
守管理も容易である。 .以上の点から、設備投資、ランニングコスト共に経済
性にすぐれている。
. Due to the simple structure, the capital investment is 30% of the conventional one. . Since the performance effect is also good (30 to 35 ° C), the oil film,
The oil temperature is well guaranteed, deterioration of the oil is prevented, the life of the seal is extended, sludge is prevented from depositing, and trouble-free is measured. . The oil temperature is the optimum value, speed control and upper limit cushion operation are smooth, and product quality does not vary. . The amount of oil used has been changed from the conventional 2000l to 200l.
It is compact and fully exerts its function with 0% oil. . The running cost does not require an electric fan, and cooling water for the cooling tower is sufficient. . Maintenance is easy without interference with the die cushion stroke adjustment mechanism. . From the above points, both capital investment and running costs are economical.

【図面の簡単な説明】[Brief description of drawings]

【図 1】本発明の冷却装置を備えたダイクッション
構成フロー図
FIG. 1 is a flow chart of a die cushion configuration including a cooling device of the present invention.

【図 2】本発明の実施例の縦断図面FIG. 2 is a vertical sectional view of an embodiment of the present invention.

【図 3】本発明のオイルクーラー縦断図面FIG. 3 is a longitudinal sectional view of the oil cooler of the present invention.

【図 4】従来の冷却装置の説明図(その1)FIG. 4 is an explanatory view of a conventional cooling device (No. 1)

【図 5】従来の冷却装置の説明図(その2)FIG. 5 is an explanatory diagram of a conventional cooling device (No. 2)

【符号の説明】[Explanation of symbols]

1.ダイクッションバット 2.ダイクッションバットロッド 3.ロッキングシリンダー 4.オペレートシリンダー 5.オイル流量調整弁 6.オイルタンク 7.冷却オイルクーラー 8.オイルクーラーチューブ 9.盲栓 10.温度指示計 11.冷却水流量調整装置 12.ダイクッションストローク調整装置 13.油室 14.油室 1. Die cushion bat 2. Die cushion butt rod 3. Locking cylinder 4. Operate cylinder 5. Oil flow rate adjustment valve 6. Oil tank 7. Cooling oil cooler 8. Oil cooler tube 9. Blind plug 10. Temperature indicator 11. Cooling water flow rate controller 12. Die cushion stroke adjusting device 13. Oil chamber 14. Oil chamber

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 オイルクーラーはステンレス性の
高圧チューブによる多管式熱変換器でチューブ内をオイ
ル、チューブ外を冷却水で通す。オイルクーラーの冷却
水側の清掃用として、上部、下部に複数の盲栓を設置す
る。
1. An oil cooler is a multi-tube heat converter using a stainless steel high-pressure tube, and oil is passed inside the tube and cooling water is passed outside the tube. To clean the cooling water side of the oil cooler, install multiple blind plugs at the top and bottom.
【請求項2】 オイルクーラー冷却水入側にスト
ップバルブを設け、 油温が上昇しない為のコントロールができる。
2. A stop valve is provided on the oil cooler cooling water inlet side to control the oil temperature so that it does not rise.
JP7037480A 1995-01-18 1995-01-18 Cooling system for hydraulic locking device of die cushion of press Pending JPH08197157A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7037480A JPH08197157A (en) 1995-01-18 1995-01-18 Cooling system for hydraulic locking device of die cushion of press

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7037480A JPH08197157A (en) 1995-01-18 1995-01-18 Cooling system for hydraulic locking device of die cushion of press

Publications (1)

Publication Number Publication Date
JPH08197157A true JPH08197157A (en) 1996-08-06

Family

ID=12498690

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7037480A Pending JPH08197157A (en) 1995-01-18 1995-01-18 Cooling system for hydraulic locking device of die cushion of press

Country Status (1)

Country Link
JP (1) JPH08197157A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102358055A (en) * 2011-07-15 2012-02-22 中国科学院宁波材料技术与工程研究所 Continuous hydraulic forming equipment and automatic control method thereof
JP2016000407A (en) * 2014-06-11 2016-01-07 アイダエンジニアリング株式会社 Die cushion device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4863353A (en) * 1971-12-03 1973-09-03

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4863353A (en) * 1971-12-03 1973-09-03

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102358055A (en) * 2011-07-15 2012-02-22 中国科学院宁波材料技术与工程研究所 Continuous hydraulic forming equipment and automatic control method thereof
JP2016000407A (en) * 2014-06-11 2016-01-07 アイダエンジニアリング株式会社 Die cushion device

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