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JPH0563246B2 - - Google Patents

Info

Publication number
JPH0563246B2
JPH0563246B2 JP60008310A JP831085A JPH0563246B2 JP H0563246 B2 JPH0563246 B2 JP H0563246B2 JP 60008310 A JP60008310 A JP 60008310A JP 831085 A JP831085 A JP 831085A JP H0563246 B2 JPH0563246 B2 JP H0563246B2
Authority
JP
Japan
Prior art keywords
temperature
apron
frame
bending angle
die
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 - Lifetime
Application number
JP60008310A
Other languages
Japanese (ja)
Other versions
JPS61169118A (en
Inventor
Hiroshi Myazawa
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.)
Amada Co Ltd
Original Assignee
Amada Co Ltd
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 Amada Co Ltd filed Critical Amada Co Ltd
Priority to JP831085A priority Critical patent/JPS61169118A/en
Publication of JPS61169118A publication Critical patent/JPS61169118A/en
Publication of JPH0563246B2 publication Critical patent/JPH0563246B2/ja
Granted legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/02Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/006Bending sheet metal along straight lines, e.g. to form simple curves combined with measuring of bends
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B30PRESSES
    • B30BPRESSES IN GENERAL
    • B30B15/00Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/14Control arrangements for mechanically-driven presses

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

PURPOSE:To obtain products having an accurate bending angle by detecting the temperature of an apron driving means and of a frame in the setting position of the driving means by a temperature detector, inputting the detected temperature value into an information processor, and correcting the setting position of the apron. CONSTITUTION:The temperature detector 19 detecting the temperature of hydraulic oil supplied by a oil pump 17 is set on an oil tank 15 and another temperature detector is set on the frame in the setting position of a hydraulic cylinder to detect the temperature of the frame in the setting position of the cylinder. The detected signals from those detectors together with the thickness, tensile strength, and bending length of a material, the forming groove width of a die, and the bending angle are inputted into the NC device 9, then an optimum distance between a punch and the die is calculated. The upper limit position of the lower apron 7 is determained based on the calculated value and the lower apron 7 is controlled to stop in a specified position by a bending angle controlling device 11.

Description

【発明の詳細な説明】 (産業上の利用分野) この発明は、温度補正機能を備えたNC制御装
置付きのプレスブレーキに関するものである。
DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a press brake with an NC control device having a temperature correction function.

(従来の技術) 一般に、プレスブレーキにより長尺の素材を折
り曲加工する場合、エプロンの昇降量によるパン
チ、ダイの係合量が僅か変化しても折曲角度は大
きく変化するので、正確な折曲角度の製品を得る
ためには、エプロンの昇降位置を正確に位置決め
する必要がある。
(Prior art) Generally, when bending a long material using a press brake, even if the amount of engagement between the punch and die changes slightly due to the amount of elevation of the apron, the bending angle changes greatly. In order to obtain a product with a good bending angle, it is necessary to accurately position the apron's elevation position.

エプロンの昇降量を制御するために必要なパン
チの先端とダイの底部との距離の演算式や、加工
条件を付加した演算式によつてNC制御したプレ
スブレーキは、既に特開昭57−100819号公報等に
発表されている。このプレスブレーキは、素材の
板厚、抗張力、折曲げ長さ、ダイの型溝巾、及び
折曲角度等を入力することにより、パンチとダイ
の最適距離を自動的に設定し、折曲作業を能率的
に行うものである。
A press brake that is NC-controlled using a formula for the distance between the tip of the punch and the bottom of the die, which is necessary to control the amount of elevation of the apron, and a formula that includes machining conditions, has already been published in Japanese Patent Application Laid-Open No. 57-100819. It has been announced in the bulletin etc. This press brake automatically sets the optimal distance between the punch and die by inputting the material thickness, tensile strength, bending length, die groove width, bending angle, etc., and performs the bending process. This is done efficiently.

(発明が解決しようとする問題点) 前記先行例においては、パンチとダイの最適距
離は次のような演算式によつて設定されている。
(Problems to be Solved by the Invention) In the preceding example, the optimum distance between the punch and the die is set by the following arithmetic expression.

D=D1−(δ1+δ2+δ3+δ4) ……(1) この式において D…パンチとダイの最適距離 D1…折曲角度に対応するパンチとダイの幾何
学的距離 δ1…加圧力によるフレーム及びエプロン取付部
のたわみ、 δ2…素材にパンチ先端が食い込む量 δ3…上下エプロンの加圧力による長手方向のた
わみ δ4…加工後の素材の弾性変形量(スプリングバ
ツク等) この演算式には、温度変化による油圧機器の性
能の変化やプレスブレーキのフレームの熱変形に
よる補正が含まれていない。しかし、次に述べる
ように、エプロン駆動装置やフレーム等の温度変
化による影響は、小さくない場合があるので、こ
の場合にはフレーム等の温度変化に対応して、パ
ンチとダイの距離を補正する必要が生ずる。
D=D 1 - (δ 1 + δ 2 + δ 3 + δ 4 ) ...(1) In this equation, D...Optimum distance between the punch and die D 1 ...Geometric distance between the punch and die corresponding to the bending angle δ 1 ...Deflection of the frame and apron attachment part due to pressure, δ 2 ...Amount of punch tip biting into the material δ 3 ...Longitudinal deflection due to pressure of the upper and lower aprons δ 4 ...Amount of elastic deformation of the material after processing (spring back, etc.) ) This calculation formula does not include corrections due to changes in hydraulic equipment performance due to temperature changes or thermal deformation of the press brake frame. However, as described below, the effect of temperature changes in the apron drive device, frame, etc. may not be small, so in this case, the distance between the punch and die should be corrected in response to temperature changes in the frame, etc. A need arises.

プレスブレーキにおいて、エプロンの昇降によ
り素材を加工する際、可動エプロン又は固定エプ
ロン取付けフレームの長手方向の一端側が温度変
化した場合には、パンチとダイが最適距離になる
ようにエプロンを制御しても、基準位置が変化す
るので、正確な折曲角度を持つた製品は得られな
い。このようなことは、油タンクや加熱器等の温
度上昇源を一方のフレームに近接して設けた場合
等に生ずる。
In press brakes, when processing materials by raising and lowering the apron, if the temperature changes at one end in the longitudinal direction of the movable apron or the fixed apron mounting frame, the apron may be controlled so that the punch and die are at the optimal distance. However, since the reference position changes, a product with an accurate bending angle cannot be obtained. Such a situation occurs when a temperature increase source such as an oil tank or a heater is provided close to one of the frames.

従来のプレスブレーキにおいては、エプロン駆
動装置やエプロン駆動装置取付け位置が加工作業
中に温度変化し、そのためパンチとダイの距離が
変化するので正確な折曲角度を持つた製品が得ら
れなかつた。この発明は、このような問題を改善
し精度のよい均一な製品を得ることのできるプレ
スブレーキを提供することを目的とするものであ
る。
In conventional press brakes, the temperature of the apron drive device and the mounting position of the apron drive device changes during processing operations, which changes the distance between the punch and die, making it impossible to obtain products with accurate bending angles. It is an object of the present invention to provide a press brake that can solve these problems and produce highly accurate and uniform products.

(問題を解決するための手段) 前記の目的を達成するために、この発明は、フ
レームの上部に固定した上部エプロンの下部にパ
ンチを備え、このパンチと協働して板材の折曲げ
加工を行なうダイを上部に備えた下部エプロンを
上下動自在に設け、この下部エプロンを上下動す
るための油圧シリンダを設けると共に上記下部エ
プロンが所望高さ位置に上昇されたときに作動さ
れて前記油圧シリンダの作動を停止する油圧切換
弁を設け、前記下部エプロンの上昇により前記圧
油切換弁が作動される前記所望高さ位置を制御し
て前記板材の折曲げ角度を制御するための折曲角
度制御装置を設け、この折曲角度制御装置を制御
するためのNC装置を設けてなるプレスブレーキ
にして、前記油圧シリンダの温度又は圧油の温度
を検出する温度検出器を設け、前記パンチ、ダイ
の加圧力による前記フレームのたわみと、前記温
度検出器の検出温度による前記フレームの変化量
を演算する演算部を前記NC装置に設け、この演
算部の演算値に基いて前記下部エプロンの上限位
置を制御する構成としてなるものである。
(Means for Solving the Problem) In order to achieve the above object, the present invention includes a punch at the lower part of the upper apron fixed to the upper part of the frame, and works together with the punch to bend the plate material. A lower apron is provided with a die thereon which is movable up and down, and a hydraulic cylinder is provided to move the lower apron up and down, and when the lower apron is raised to a desired height position, the hydraulic cylinder is activated. A bending angle control for controlling the bending angle of the plate material by providing a hydraulic switching valve for stopping the operation of the plate material, and controlling the desired height position at which the pressure oil switching valve is activated by the rise of the lower apron. A press brake is provided with an NC device for controlling the bending angle control device, a temperature detector is provided for detecting the temperature of the hydraulic cylinder or the temperature of the pressure oil, and The NC device is provided with a calculation unit that calculates the deflection of the frame due to pressurizing force and the amount of change in the frame due to the temperature detected by the temperature sensor, and the upper limit position of the lower apron is determined based on the calculated value of the calculation unit. This is a control configuration.

(実施例) 次に、この発明の実施例について図面に基づい
て説明する。第2図は、この発明を実施したNC
制御装置付きプレスブレーキ1の説明図で、フレ
ーム3、上部エプロン(固定)5、下部エプロン
(可動)7等の主要部から構成されている。この
プレスブレーキ1は、情報処理回路からなるNC
装置9の指令値に基づき、後述するサーボ機構か
らなる折曲角度制御装置11により、下部エプロ
ン駆動装置の圧油切換弁13が制御され、素材を
所定角度に折曲加工するものである。
(Example) Next, an example of the present invention will be described based on the drawings. Figure 2 shows the NC that implemented this invention.
This is an explanatory diagram of a press brake 1 with a control device, which is composed of main parts such as a frame 3, an upper apron (fixed) 5, and a lower apron (movable) 7. This press brake 1 is an NC consisting of an information processing circuit.
Based on the command value of the device 9, a bending angle control device 11 consisting of a servo mechanism to be described later controls a pressure oil switching valve 13 of the lower apron drive device to bend the material at a predetermined angle.

油タンク15には、ポンプユニツト17によつ
て供給される圧油の温度を検出する温度検出器1
9が設けられ、また油圧シリンダ21(第3図参
照)のフレームへの取付位置に、この部の温度を
検出する温度検出器23が設けられている。
The oil tank 15 is equipped with a temperature detector 1 for detecting the temperature of the pressure oil supplied by the pump unit 17.
9 is provided, and a temperature detector 23 for detecting the temperature of this portion is provided at a position where the hydraulic cylinder 21 (see FIG. 3) is attached to the frame.

これらの温度検出器の検出信号は、第1図のよ
うに、素材の板厚、抗張力、折曲げ長さ、ダイの
型溝巾、折曲角度等と共にNC装置9に入力さ
れ、パンチ25とダイ27の最適距離を例えば次
のような式によつて演算される(第4図参照)。
The detection signals from these temperature detectors are input to the NC device 9 along with the material thickness, tensile strength, bending length, die groove width, bending angle, etc. as shown in FIG. The optimum distance of the die 27 is calculated, for example, by the following formula (see FIG. 4).

D=D1−(δ1′+δ2+δ3′+δ4) ……(2) この式においてD,D1,δ2,δ4は前記の式(1)と
同様で、δ1′,δ3′は次の通りである。
D=D 1 −(δ 1 ′+δ 23 ′+δ 4 )……(2) In this equation, D, D 1 , δ 2 , δ 4 are the same as in the above equation (1), and δ 1 ′, δ 3 ′ is as follows.

δ1′…加圧力によるフレーム及びエプロン取付
け部のたわみと温度による変化量 δ3′…上下エプロンの加圧力による長手方向の
たわみと温度による変化量 この演算式による演算値に基づいて、下部エプ
ロン7の上限位置が定められ、折曲角度制御装置
11により、下部エプロンは所定位置に停止する
ように制御される。
δ 1 ′...Deflection of the frame and apron attachment part due to pressure and the amount of change due to temperature δ 3 ′...Longitudinal deflection due to pressure of the upper and lower aprons and amount of change due to temperature Based on the calculated value from this calculation formula, the lower apron 7 is determined, and the bending angle control device 11 controls the lower apron to stop at a predetermined position.

次に、サーボ機構を備えた折曲角度制御装置1
1の1例を第5図によつて説明する。下部エプロ
ン7の長手方向中央部に、これと共に上下する係
止片29が設けられている。フレーム3にベルク
ランク31が、枢軸33を中心として揺動自在に
設けられ、更にベルクランク31の横方向の腕に
は、ピン35を枢軸として、レバー37が揺動自
在に設けられている。レバー37の左端は、フレ
ーム3に固定されたバネ39を介して油圧切換弁
(上限弁)13の、スプール13−aに常時当接
しており、右端は前記の係止片29の直上に位置
している。下部エプロンが上昇し、係止片29が
レバー37の右端を押し上げると、その左端が油
圧切換弁13のスプール13−aを押し下げ、油
圧の供給が断たれ下部エプロンは、上昇を停止す
る。
Next, the bending angle control device 1 equipped with a servo mechanism
An example of No. 1 will be explained with reference to FIG. A locking piece 29 that moves up and down together with the lower apron 7 is provided at the center in the longitudinal direction of the lower apron 7. A bell crank 31 is provided on the frame 3 so as to be swingable about a pivot 33, and a lever 37 is also provided on a lateral arm of the bell crank 31 so as to be swingable about a pin 35. The left end of the lever 37 is always in contact with the spool 13-a of the hydraulic switching valve (upper limit valve) 13 via a spring 39 fixed to the frame 3, and the right end is located directly above the locking piece 29. are doing. When the lower apron rises and the locking piece 29 pushes up the right end of the lever 37, the left end pushes down the spool 13-a of the hydraulic switching valve 13, the supply of hydraulic pressure is cut off, and the lower apron stops rising.

ベルクランク31の縦方向の腕は、その先端部
に設けられたピン41によつて連結棒43の右端
に枢着され、連結棒43の左端は、ケース45に
回転自在に軸支された送りねじ棒47に螺合した
ナツト部材49に固定されている。送りねじ棒4
7の左端部には、歯車51を介してクラツチ53
が連結され、その左端部にクラツチの切換えを行
うレバー55を介してハンドル57が連結されて
おり、手動でエプロン停止位置を調整することが
できる。
The vertical arm of the bell crank 31 is pivotally connected to the right end of a connecting rod 43 by a pin 41 provided at its tip, and the left end of the connecting rod 43 is connected to a feed shaft rotatably supported by a case 45. It is fixed to a nut member 49 screwed onto a threaded rod 47. Feed screw rod 4
A clutch 53 is connected to the left end of 7 via a gear 51.
A handle 57 is connected to the left end of the clutch via a lever 55 for switching the clutch, so that the apron stop position can be manually adjusted.

ケース45には、サーボモータの回転角度をフ
イードバツクするロータリーエンコーダ59が回
転自在に軸支されており、このエンコーダ59に
取付けられた小歯車61は、前記の送りねじ棒4
7に取付けられた歯車51と、歯付きベルト63
によつて連繋されている。また、ケース45には
クラツチ65が設けてあり、このクラツチの軸6
7に取付けられた歯車69は、エンコーダ59に
取付けられた大歯車71と、歯付きベルト73に
よつて連繋されている。クラツチ65の左端に
は、ケース45に取付けられたサーボモータ75
の軸77が連結され、サーボモータ75の左端に
はサーボモータの回転速度をフイードバツクする
タコジエネレータ79が設けられている。
A rotary encoder 59 that feeds back the rotation angle of the servo motor is rotatably supported on the case 45, and a small gear 61 attached to the encoder 59 is connected to the feed screw rod 4.
Gear 51 attached to 7 and toothed belt 63
are connected by. Further, the case 45 is provided with a clutch 65, and the shaft 6 of this clutch is
A gear 69 attached to the encoder 7 is connected to a large gear 71 attached to the encoder 59 by a toothed belt 73. At the left end of the clutch 65 is a servo motor 75 attached to the case 45.
A tachometer generator 79 is provided at the left end of the servo motor 75 to feed back the rotational speed of the servo motor.

このように構成されているので、手動ハンドル
57またはサーボモータ75を回転すれば、送り
ねじ棒47が回転し、ベルクランク31を枢軸3
3を中心に揺動させ、レバー37の右端と係止片
29の距離即ち下部エプロンの上昇位置(ストロ
ーク)を制御することができる。
With this configuration, when the manual handle 57 or the servo motor 75 is rotated, the feed screw rod 47 is rotated, and the bell crank 31 is moved to the pivot 3.
3 to control the distance between the right end of the lever 37 and the locking piece 29, that is, the upward position (stroke) of the lower apron.

(発明の効果) 以上のごとき実施例の説明より理解されるよう
に、要するに本発明は、フレーム3の上部に固定
した上部エプロン5の下部にパンチ25を備え、
このパンチ25と協働して板材Wの折曲げ加工を
行なうダイ27を上部に備えた下部エプロン7を
上下動自在に設け、この下部エプロン7を上下動
するための油圧シリンダ21を設けると共に上記
下部エプロン7が所望高さ位置に上昇されたとき
に作動されて前記油圧シリンダ21の作動を停止
する油圧切換弁13を設け、前記下部エプロン7
の上昇により前記圧油切換弁13が作動される前
記所望高さ位置を制御して前記板材Wの折曲げ角
度を制御するための折曲角度制御装置11を設
け、この折曲角度制御装置11を制御するための
NC装置9を設けてなるプレスブレーキにして、
前記油圧シリンダ21の温度又は圧油の温度を検
出する温度検出器23,19を設け、前記パンチ
25、ダイ27の加圧力による前記フレーム3の
たわみと、前記温度検出器23,19の検出温度
による前記フレーム3の変化量を演算する演算部
を前記NC装置9に設け、この演算部の演算値に
基いて前記下部エプロン7の上限位置を制御する
構成としてなるものである。
(Effects of the Invention) As can be understood from the above description of the embodiments, in short, the present invention provides a punch 25 at the lower part of the upper apron 5 fixed to the upper part of the frame 3,
A lower apron 7 equipped with a die 27 on the upper part that cooperates with the punch 25 to bend the plate material W is provided so as to be movable up and down, and a hydraulic cylinder 21 is provided for moving the lower apron 7 up and down. A hydraulic switching valve 13 is provided which is activated to stop the operation of the hydraulic cylinder 21 when the lower apron 7 is raised to a desired height position.
A bending angle control device 11 is provided for controlling the bending angle of the plate material W by controlling the desired height position at which the pressure oil switching valve 13 is actuated by the rise of the pressure oil switching valve 13. to control
A press brake equipped with an NC device 9,
Temperature detectors 23 and 19 are provided to detect the temperature of the hydraulic cylinder 21 or the temperature of pressure oil, and the deflection of the frame 3 due to the pressing force of the punch 25 and die 27 and the temperature detected by the temperature detectors 23 and 19 are provided. The NC device 9 is provided with a calculation unit that calculates the amount of change in the frame 3 caused by the change in the frame 3, and the upper limit position of the lower apron 7 is controlled based on the calculation value of the calculation unit.

上記構成より明らかなように、本発明において
は、プレスブレーキにおける下部エプロン7を上
下動するための油圧シリンダ21の温度又は圧油
の温度を検出する温度検出器23,19を設け、
この温度検出器23,19の検出温度によるフレ
ーム3の変化量とパンチ25、ダイ27の加圧力
によるフレーム3のたわみを演算する演算部を
NC装置9に設けて、この演算部の演算値に基い
て下部エプロン7の上限位置を制御する構成であ
るから、本発明によれば、パンチ25、ダイ27
の加圧力によるフレーム3の変形量を補正できる
ことは勿論のこと、フレーム3の温度変化による
変化量も補正でき、加工開始時と適宜時間経過後
に油温の変化があつても精度の良い折曲げ加工を
行なうことができるものである。
As is clear from the above configuration, in the present invention, temperature detectors 23 and 19 are provided to detect the temperature of the hydraulic cylinder 21 or the temperature of the pressure oil for vertically moving the lower apron 7 in the press brake.
A calculation unit that calculates the amount of change in the frame 3 due to the temperature detected by the temperature detectors 23 and 19 and the deflection of the frame 3 due to the pressing force of the punch 25 and the die 27 is provided.
According to the present invention, the punch 25, die 27
Not only can the amount of deformation of the frame 3 due to the pressing force of the frame 3 be corrected, but also the amount of change due to temperature changes in the frame 3 can be corrected, allowing for accurate bending even if there is a change in oil temperature at the start of machining and after an appropriate period of time. It can be processed.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図はこの発明の説明用ブロツク図、第2図
はこの発明を実施したプレスブレーキの説明図、
第3図は油圧シリンダ取付部に温度検出器を設け
た説明図、第4図は加工時のパンチ、ダイ及び素
材の関係を示す説明図、第5図は折曲角度制御装
置の例示説明図である。 図面の主要な部分を表わす符号の説明、1……
NC制御装置付きプレスブレーキ、3……フレー
ム、5……上部エプロン、7……下部エプロン、
9……NC装置、11……折曲角度制御装置、1
3……油圧切換弁、15……油タンク、17……
ポンプユニツト、19……温度検出器、21……
油圧シリンダ、23……温度検出器、25……パ
ンチ、27……ダイ、29……係止片。
FIG. 1 is an explanatory block diagram of this invention, FIG. 2 is an explanatory diagram of a press brake implementing this invention,
Fig. 3 is an explanatory diagram showing a temperature sensor installed at the hydraulic cylinder mounting part, Fig. 4 is an explanatory diagram showing the relationship between the punch, die, and material during processing, and Fig. 5 is an explanatory diagram showing an example of the bending angle control device. It is. Explanation of the symbols representing the main parts of the drawing, 1...
Press brake with NC control device, 3... Frame, 5... Upper apron, 7... Lower apron,
9... NC device, 11... Bending angle control device, 1
3... Hydraulic switching valve, 15... Oil tank, 17...
Pump unit, 19... Temperature detector, 21...
Hydraulic cylinder, 23...temperature detector, 25...punch, 27...die, 29...locking piece.

Claims (1)

【特許請求の範囲】[Claims] 1 フレーム3の上部に固定した上部エプロン5
の下部にパンチ25を備え、このパンチ25と協
働して板材Wの折曲げ加工を行なうダイ27を上
部に備えた下部エプロン7を上下動自在に設け、
この下部エプロン7を上下動するための油圧シリ
ンダ21を設けると共に上記下部エプロン7が所
望高さ位置に上昇されたときに作動されて前記油
圧シリンダ21の作動を停止する油圧切換弁13
を設け、前記下部エプロン7の上昇により前記圧
油切換弁13が作動される前記所望高さ位置を制
御して前記板材Wの折曲げ角度を制御するための
折曲角度制御装置11を設け、この折曲角度制御
装置11を制御するためのNC装置9を設けてな
るプレスブレーキにして、前記油圧シリンダ21
の温度又は圧油の温度を検出する温度検出器2
3,19を設け、前記パンチ25、ダイ27の加
圧力による前記フレーム3のたわみと、前記温度
検出器23,19の検出温度による前記フレーム
3の変化量を演算する演算部を前記NC装置9に
設け、この演算部の演算値に基いて前記下部エプ
ロン7の上限位置を制御する構成としてなること
を特徴とするプレスブレーキ。
1 Upper apron 5 fixed to the upper part of frame 3
A lower apron 7 is provided with a punch 25 at the bottom and a die 27 at the top that cooperates with the punch 25 to bend the plate material W, and is movable up and down.
A hydraulic cylinder 21 is provided for moving the lower apron 7 up and down, and a hydraulic switching valve 13 is activated to stop the operation of the hydraulic cylinder 21 when the lower apron 7 is raised to a desired height position.
and a bending angle control device 11 for controlling the bending angle of the plate material W by controlling the desired height position at which the pressure oil switching valve 13 is activated by the rise of the lower apron 7, The press brake is equipped with an NC device 9 for controlling the bending angle control device 11, and the hydraulic cylinder 21
Temperature detector 2 that detects the temperature of or the temperature of pressure oil
3 and 19 are provided, and a calculation unit for calculating the deflection of the frame 3 due to the pressing force of the punch 25 and the die 27 and the amount of change in the frame 3 due to the temperature detected by the temperature detectors 23 and 19 is connected to the NC device 9. A press brake, characterized in that the press brake is configured such that the upper limit position of the lower apron 7 is controlled based on the calculated value of the calculating section.
JP831085A 1985-01-22 1985-01-22 Press machine provided with temperature correction means Granted JPS61169118A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP831085A JPS61169118A (en) 1985-01-22 1985-01-22 Press machine provided with temperature correction means

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP831085A JPS61169118A (en) 1985-01-22 1985-01-22 Press machine provided with temperature correction means

Publications (2)

Publication Number Publication Date
JPS61169118A JPS61169118A (en) 1986-07-30
JPH0563246B2 true JPH0563246B2 (en) 1993-09-10

Family

ID=11689576

Family Applications (1)

Application Number Title Priority Date Filing Date
JP831085A Granted JPS61169118A (en) 1985-01-22 1985-01-22 Press machine provided with temperature correction means

Country Status (1)

Country Link
JP (1) JPS61169118A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2686099B2 (en) * 1988-07-08 1997-12-08 株式会社アマダ NC device of bending machine
JPH0331014U (en) * 1989-07-27 1991-03-26
JP2577430Y2 (en) * 1990-09-12 1998-07-30 株式会社アマダ Valve device
GB2373466B (en) * 2001-03-22 2004-05-19 Unova Uk Ltd Method of reducing thermal distortion in grinding machines
JP3085503U (en) * 2001-10-22 2002-05-10 株式会社サルバニーニジャパン High efficiency machine with temperature compensation for sheet bending at constant programmed bending angle
CN109664546A (en) * 2017-10-16 2019-04-23 奥地利通快机械有限及两合公司 For controlling the method and hydraulic bending press of the hydraulic bending cycle of hydraulic bending press
CN112453132B (en) * 2019-09-09 2022-10-14 河南森源重工有限公司 U-shaped arm bending control method and device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56163100A (en) * 1980-05-19 1981-12-15 Amada Co Ltd Method and apparatus for controlling temperature displacement of frame of machine tool
JPS57100819A (en) * 1980-12-09 1982-06-23 Amada Co Ltd Bending angle controlling device in press brake
JPS60257997A (en) * 1984-06-01 1985-12-19 Fukui Kikai Kk Automatic correcting device for slide position in press

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56163100A (en) * 1980-05-19 1981-12-15 Amada Co Ltd Method and apparatus for controlling temperature displacement of frame of machine tool
JPS57100819A (en) * 1980-12-09 1982-06-23 Amada Co Ltd Bending angle controlling device in press brake
JPS60257997A (en) * 1984-06-01 1985-12-19 Fukui Kikai Kk Automatic correcting device for slide position in press

Also Published As

Publication number Publication date
JPS61169118A (en) 1986-07-30

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