JPS6230043B2 - - Google Patents
Info
- Publication number
- JPS6230043B2 JPS6230043B2 JP18960883A JP18960883A JPS6230043B2 JP S6230043 B2 JPS6230043 B2 JP S6230043B2 JP 18960883 A JP18960883 A JP 18960883A JP 18960883 A JP18960883 A JP 18960883A JP S6230043 B2 JPS6230043 B2 JP S6230043B2
- Authority
- JP
- Japan
- Prior art keywords
- amount
- stretching
- section
- stress
- stretched
- 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
Links
- 238000000034 method Methods 0.000 claims description 11
- 238000010586 diagram Methods 0.000 description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 5
- 230000003321 amplification Effects 0.000 description 4
- 238000003199 nucleic acid amplification method Methods 0.000 description 4
- 230000010354 integration Effects 0.000 description 2
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
- B21D1/05—Stretching combined with rolling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Straightening Metal Sheet-Like Bodies (AREA)
Description
【発明の詳細な説明】
〔発明の利用分野〕
この発明はストレツチヤレベラのストレツチ量
制御方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a method for controlling the amount of stretch of a stretcher leveler.
ストレツチヤレベラはアルミニウム板などに引
張応力を与えて伸延し、そのひずみを除去するも
のであり、アルミニウム板などには適正なストレ
ツチ量を与える必要がある。しかしアルミニウム
板などはその応力―ひずみ特性が均一ではなく、
しかも一回の伸延ごとにアルミニウム板などの応
力―ひずみ特性を把握することは容易でない。こ
のため従来は、アルミニウム板などの規格量に基
づいてその応力―ひずみ特性を推定しつつ伸延を
行つており、必ずしも適正なストレツチ量が得ら
れるとは限らなかつた。
A stretcher leveler applies tensile stress to an aluminum plate, stretches it, and removes the strain, and it is necessary to apply an appropriate amount of stretch to the aluminum plate. However, the stress-strain characteristics of aluminum plates etc. are not uniform,
Moreover, it is not easy to understand the stress-strain characteristics of an aluminum plate or the like after each stretching. For this reason, in the past, stretching was performed while estimating the stress-strain characteristics of an aluminum plate or the like based on the standard amount, and it was not always possible to obtain an appropriate amount of stretching.
この発明はこのような従来の問題点を解消すべ
く創案されたもので、ストレツチ量を最適値に制
御するためのストレツチ量制御方法を提供するこ
とを目的とする。
The present invention was devised to solve these conventional problems, and an object thereof is to provide a stretching amount control method for controlling the stretching amount to an optimum value.
この発明に係るストレツチヤレベラのストレツ
チ量制御方法は、ストレツチヤレベラによる被伸
延材の伸延過程で被伸延材の応力―ひずみ特性を
把握するものである。
The method for controlling the amount of stretching of a stretcher leveler according to the present invention is to grasp the stress-strain characteristics of a stretched material during the stretching process of the stretched material by the stretcher leveler.
次にこの発明に係るストレツチ量制御方法の第
一実施例を図面に基づいて説明する。
Next, a first embodiment of the stretching amount control method according to the present invention will be described based on the drawings.
第１図はこの実施例に用いる制御装置を示すも
のであり、この制御装置はストレツチヤレベラの
各シリンダ１，２の位置を検出する位置検出器
３，４と、シリンダ１の速度を検出する速度検出
器５を備えている。位置検出器１，２の出力信号
ｘ１，ｘ２は加算部６で加算され、その後除算部
７で被伸延材８の全長の２倍、２Ｌで前記和（ｘ
１＋ｘ２）を割る。ここで求められた（ｘ１＋ｘ
２）／２Ｌは一般に引張量ε′と呼ばれるもので
ある。 FIG. 1 shows a control device used in this embodiment. This control device includes position detectors 3 and 4 for detecting the positions of cylinders 1 and 2 of the stretcher leveler, and position detectors 3 and 4 for detecting the speed of cylinder 1. A speed detector 5 is provided. The output signals x1, x2 of the position detectors 1, 2 are added in an adder 6, and then in a divider 7, the sum (x
1+x2). Here it was found (x1+x
2)/2L is generally called the tensile amount ε'.
前記シリンダ１，２を駆動する油圧回路には圧
力センサ９，１０が設けられ、各圧力センサ９，
１０の出力信号Ｐ１，Ｐ２は加算部１１で加算さ
れている。シリンダ１，２の有効断面積をＡ、被
伸延材の横断面積をApとするとき、加算部１１
で求められた和（Ｐ１＋Ｐ２）には、積算部１２
においてＡ／Apが掛けられる。ここで求められ
た（Ｐ１＋Ｐ２）×Ａ／Apは被伸延材８に生じる
応力σとなる。 Pressure sensors 9 and 10 are provided in the hydraulic circuit that drives the cylinders 1 and 2, and each pressure sensor 9,
The ten output signals P1 and P2 are added in an adder 11. When the effective cross-sectional area of the cylinders 1 and 2 is A, and the cross-sectional area of the material to be stretched is Ap, the adding section 11
The sum (P1+P2) obtained in
is multiplied by A/Ap. (P1+P2)×A/Ap obtained here becomes the stress σ generated in the stretched material 8.
前記引張量ε′および応力σは演算処理部１２
に入力され、演算処理部１２はε′およびσに基
づいてストレツチ量εを求める。 The tensile amount ε' and the stress σ are calculated by the calculation processing section 12.
is input, and the arithmetic processing unit 12 calculates the stretch amount ε based on ε' and σ.
第３図に示すように、被伸延材８が弾性限度を
越えてＤ点までのひずみが生じているとき、被伸
延材８の初期たるみ量をεc、スプリングバツク
量をεEとすると、
ε＝ε′−（εc＋εE） ……(1)
ここに初期たるみ量εcは、弾性限度内での直
線的な応力―ひずみ線図Ｂ―Ｃのひずみε′の座
標軸との交点Ａにおけるε′の値である。またス
プリングバツク量εEは、点Ｄから直線Ｂ―Ｃに
平行にひいた直線とひずみε′の座標軸との交点
Ｆと、点Ｄからこの座標軸に下した垂線の足
D′との距離に対応するひずみ値である。 As shown in FIG. 3, when the material to be stretched 8 is strained beyond its elastic limit to point D, let the initial slack amount of the material to be distracted 8 be ε c and the amount of spring back be ε E ; ε=ε′−( εc + εE )……(1) Here, the initial slack amount εc is the intersection point of the linear stress-strain diagram B-C with the coordinate axis of strain ε′ within the elastic limit. This is the value of ε′ at A. The springback amount ε E is calculated from the intersection point F of a straight line drawn from point D parallel to straight line B-C and the coordinate axis of strain ε', and the foot of the perpendicular line drawn from point D to this coordinate axis.
This is the strain value corresponding to the distance from D′.
演算処理部１２は被伸延材８の縦弾性係数Ｅを
記憶しており、弾性限度内のε′とσから初期た
るみ量εcを求め、その後弾性限度を越えたσ、
ε′、例えばＤ点のσ、ε′からスプリングバツク
量εE（＝σ／Ｅ）を求め、最終的にストレツチ
量εを求める。 The arithmetic processing unit 12 stores the longitudinal elastic modulus E of the stretched material 8, calculates the initial slack amount ε c from ε′ and σ within the elastic limit, and then calculates the initial slack amount ε c that exceeds the elastic limit, σ,
The springback amount ε E (=σ/E) is determined from ε', for example, σ and ε' at point D, and finally the stretch amount ε is determined.
演算処理部１２をブロツク図で示せば第２図の
ようになり、演算処理部１２は弾性限度内のＣ点
を記憶する記憶部１３，１４を備え、記憶部１
３，１４には、スイツチ１５，１６を介してσ、
ε′が入力される。スイツチ１５，１６はコンパ
レータ１７によつて駆動され、コンパレータ１７
は、σがあらかじめ設定されたσcpに等しくなつ
たときにスイツチ１５，１６を閉じる。σcpは弾
性限度内に確実に含まれる応力値σの値であり、
このときのσ、ε′がεc、ε′cとして記憶部１
３，１４に記憶される。 The arithmetic processing section 12 is shown in a block diagram as shown in FIG.
3 and 14, through switches 15 and 16, σ,
ε' is input. The switches 15 and 16 are driven by a comparator 17.
closes switches 15 and 16 when σ becomes equal to a preset σ cp . σ cp is the value of the stress value σ that is definitely included within the elastic limit,
At this time, σ and ε' are assumed to be ε c and ε' c in the storage unit 1.
3, 14.
σcは減算部１８においてσから減算され、さ
らにここで求められた（σ−σc）には積算部１
９において1/Eが掛けられる。この（σ−σ
c）／Ｅは減算部２０においてε′から減算され
て、
ε′−（σ−σc）／Ｅ
が得られ、さらに減算部２０でこの値からε′cが
減算され、
ε′−（σ−σc）／Ｅ−ε′c
＝ε′−（ε′c−σc／Ｅ）σ／Ｅ
＝ε′−（εc＋εE）＝ε（ストレツチ量）
が得られる。 σ c is subtracted from σ in the subtraction unit 18, and (σ−σ c ) obtained here is further subtracted from the summation unit 1.
9 is multiplied by 1/E. This (σ−σ
c )/E is subtracted from ε' in the subtracting unit 20 to obtain ε'-(σ-σ c )/E, and further, ε' c is subtracted from this value in the subtracting unit 20 to obtain ε'-( The following is obtained: σ-σ c )/E-ε' c = ε'-(ε' c -σ c /E) σ/E = ε'-(ε c +ε E )=ε (stretch amount).
このようにその時点でのストレツチ量εを求め
ることができるので、ストレツチ量の制御は容易
になる。ここで所要ストレツチ量をεpとする
と、ストレツチ量εは、この所要ストレツチ量ε
pを記憶した関数発生器２１に入力され（第１
図）、関数発生器２１は、（εp−ε）に対応した
関数ｆ（ε）を出力する。関数ｆ（ε）は積算部
２２においてＫ倍され、シリンダ１，２の所要移
動速度Ｖp＝Kf（ε）が与えられる。このＶpは、
前記速度検出器５からの出力信号Ｖと比較部２３
において比較され、差（Ｖp−Ｖ）が出力され
る。差（Ｖp−Ｖ）はPI演算部２４に入力され、
PI演算部２４は、シリンダ２，１を駆動する油圧
ポンプ２５，２６の吐出量を制御するための信号
Ｓを出力する。この信号Ｓは、減算部２７、増幅
部２８を介して油圧ポンプ２５に入力され、また
加算部２９、増幅部３０を介して油圧ポンプ２６
に入力されている。前記位置検出器３，４の出力
信号ｘ１，ｘ２は減算部３１に入力されて差△ｘ
＝（ｘ２−ｘ１）が求められ、この差（ｘ２−ｘ
１）はPI演算部３２で演算処理された後に前記減
算部２７、加算部２９に入力される。PI演算処理
された差（ｘ２−ｘ１）は前記出力信号Ｓを補正
する信号となり、これによつて両シリンダ１，２
の移動量の均等化が図られる。 Since the stretching amount ε at that point in time can be determined in this way, the stretching amount can be easily controlled. Here, if the required stretching amount is ε p , then the stretching amount ε is the required stretching amount ε
is input to the function generator 21 that stores p (the first
), the function generator 21 outputs a function f(ε) corresponding to (ε p −ε). The function f(ε) is multiplied by K in the integrating section 22 to give the required moving speed V p =Kf(ε) of the cylinders 1 and 2. This Vp is
The output signal V from the speed detector 5 and the comparison section 23
The difference (V p -V) is output. The difference (V p -V) is input to the PI calculation section 24,
The PI calculation unit 24 outputs a signal S for controlling the discharge amount of the hydraulic pumps 25 and 26 that drive the cylinders 2 and 1. This signal S is input to the hydraulic pump 25 via the subtraction section 27 and the amplification section 28, and is input to the hydraulic pump 25 via the addition section 29 and the amplification section 30.
has been entered. The output signals x1 and x2 of the position detectors 3 and 4 are input to a subtraction unit 31 and the difference Δx
= (x2-x1) is calculated, and this difference (x2-x
1) is subjected to arithmetic processing in the PI calculation unit 32 and then input to the subtraction unit 27 and addition unit 29. The difference (x2-x1) subjected to PI calculation becomes a signal for correcting the output signal S, and thereby both cylinders 1 and 2
The amount of movement is equalized.
この実施例では縦弾性係数Ｅを既知として演算
処理を行つたが、実際の縦弾性係数Ｅと異なる縦
弾性係数Ｅ１を用いてストレツチ量ε１を求めた
とき、実際のストレツチヤ量εとの誤差△εは次
のとおりになる。（第４図参照）
△ε＝ε−ε１＝（σ−σc）×（１−Ｅ／
E1）／E1
このような誤差の発生を防止するためには第５
図に示す演算処理部を用いた第二実施例を適用す
べきである。 In this example, the calculation process was performed with the longitudinal elastic modulus E already known, but when the stretching amount ε1 was determined using a longitudinal elastic modulus E1 different from the actual longitudinal elastic modulus E, the error from the actual stretching amount ε was △ ε is as follows. (See Figure 4) △ε=ε−ε1=(σ−σ c )×(1−E/
E1)/E1 In order to prevent such errors from occurring, the fifth
The second embodiment using the arithmetic processing section shown in the figure should be applied.
第５図において、演算処理部はｎ個のコンパレ
ータ１７―１〜１７―ｎを備え、各コンパレータ
１７―１〜１７―ｎはそれぞれスイツチ１５―１
〜１５―ｎ，６―１〜１６―ｎを駆動し得る。ス
イツチ１５―１〜１５―ｎはε′の値を記憶部３
３―１〜３３―ｎに伝達するものであり、スイツ
チ１６―１〜１６―ｎはσの値を記憶部３３―１
〜３３―ｎに伝達するものである。 In FIG. 5, the arithmetic processing section includes n comparators 17-1 to 17-n, and each comparator 17-1 to 17-n is connected to a switch 15-1.
~15-n, 6-1 ~ 16-n can be driven. The switches 15-1 to 15-n store the value of ε′ in the storage unit 3.
The switches 16-1 to 16-n transmit the value of σ to the storage unit 33-1.
~33-n.
各コンパレータ１７―１〜１７―ｎには被伸延
材の弾性限度内の異なるσの値σ10〜σｎpがそ
れぞれ入力されており、コンパレータ１７―１〜
１７―ｎはσの値がσ10−σｎpに等しくなつた
ときに、その時点のσ、ε′を記憶部３３―１〜
３３―ｎに入力する。記憶部３３−１〜３３−ｎ
はσ、ε′の他に（ε′）２、ε′×σを記憶し、
例えば、記憶部３３―１はσ10およびこれ対応し
たε′10、（ε′10）2、ε′10×σ10を、記憶部３３
―
ｎは、ε′ｎpおよびこれに対応したε′ｎp、
（ε′ｎp）２、ε′ｎp×σｎpを記憶する。第６図
に示すように、このように記憶されたσ10……σ
ｎp、ε′10……εｎpは弾性限度内の応力―ひづ
み線図上の複数の点１，２，……ｎを示す。記憶
部３３―１〜３３―ｎには演算部３４が接続さ
れ、演算部３４は点１，２，……ｎの回帰直線、
すなわち応力―ひずみ線図の弾性限度内の部分の
最小二乗近似を求め、これから縦弾性係数Ｅおよ
び初期たるみ量εcを算出する。 Different values of σ 10 to σn p within the elastic limit of the material to be stretched are input to each of the comparators 17-1 to 17-n, and the comparators 17-1 to
17-n stores σ and ε′ at that time when the value of σ becomes equal to σ 10 −σn p in the storage units 33-1 to 17-n.
33-n. Storage units 33-1 to 33-n
In addition to σ and ε′, (ε′) 2 and ε′×σ are stored,
For example, the storage unit 33-1 stores σ 10 and the corresponding ε′ 10 , (ε′ 10 ) 2 , ε′ 10 ×σ 10 .
―
n is ε′n p and the corresponding ε′n p ,
(ε′n p ) 2 , ε′n p ×σn p are stored. As shown in Fig. 6, σ 10 ...σ stored in this way
n p , ε' 10 . . . εn p indicates a plurality of points 1, 2, . . . n on the stress-strain diagram within the elastic limit. A calculation unit 34 is connected to the storage units 33-1 to 33-n, and the calculation unit 34 calculates regression lines of points 1, 2, . . . n,
That is, the least squares approximation of the portion of the stress-strain diagram within the elastic limit is obtained, and from this the longitudinal elastic modulus E and the initial sag amount ε c are calculated.
このように弾性限度内の複数の実測値を採れ
ば、前述のストレツチ量の誤差△εを最小限に抑
えることができ、ストレツチ量をより適正に制御
し得る。 By taking a plurality of measured values within the elastic limit in this manner, the above-mentioned error Δε in the amount of stretching can be minimized, and the amount of stretching can be controlled more appropriately.
前述のとおり、この発明に係るストレツチヤレ
ベラのストレツチ量制御方法は、被伸延材の伸延
過程で被伸延材の応力―ひずみ特性を把握するの
で、ストレツチ量を最適値に制御し得るという優
れた効果を有する。
As mentioned above, the method for controlling the amount of stretching of a stretcher leveler according to the present invention has the advantage of being able to control the amount of stretching to an optimal value because the stress-strain characteristics of the material to be stretched are grasped during the stretching process of the material. have an effect.
第１図はこの発明の第一実施例に用いる制御装
置を示すブロツク図、第２図は同実施例における
演算処理部を示すブロツク図、第３図は同実施例
における演算過程を説明するための応力―ひずみ
線図、第４図は第一実施例における誤差の発生状
況を説明するための応力―ひずみ線図、第５図は
第二実施例における演算処理部を示すブロツク
図、第６図は同実施例における演算過程を説明す
るための応力―ひずみ線図である。
１，２……シリンダ、３，４……位置検出器、
５……速度検出器、６……加算部、７……除算
部、８……被伸延部、９，１０……圧力センサ、
１１……加算部、１２……演算処理部、１３，１
４……記憶部、１５，１６……スイツチ、１７…
…コンパレータ、１８……加算部、１９……積算
部、２０，２０′……減算部、２１……関数発生
器、２２……積算部、２３……比較部、２４……
PI演算部、２５，２６……油圧ポンプ、２７……
減算部、２８……増幅部、２９……加算部、３０
……増幅部、３１……減算部、３２……PI演算
部、３３―１〜３３―ｎ……記憶部、３４……演
算部。
Fig. 1 is a block diagram showing a control device used in a first embodiment of the present invention, Fig. 2 is a block diagram showing a calculation processing section in the same embodiment, and Fig. 3 is for explaining the calculation process in the same embodiment. 4 is a stress-strain diagram for explaining the error occurrence situation in the first embodiment. FIG. 5 is a block diagram showing the arithmetic processing section in the second embodiment. The figure is a stress-strain diagram for explaining the calculation process in the same example. 1, 2...Cylinder, 3, 4...Position detector,
5... Speed detector, 6... Addition section, 7... Division section, 8... Distracted section, 9, 10... Pressure sensor,
11...addition section, 12...computation processing section, 13,1
4...Storage section, 15, 16...Switch, 17...
... Comparator, 18 ... Addition section, 19 ... Integration section, 20, 20' ... Subtraction section, 21 ... Function generator, 22 ... Integration section, 23 ... Comparison section, 24 ...
PI calculation section, 25, 26...Hydraulic pump, 27...
Subtraction section, 28...Amplification section, 29...Addition section, 30
...Amplification section, 31...Subtraction section, 32...PI operation section, 33-1 to 33-n...Storage section, 34...Arithmetic section.
Claims (1)
に、被伸延材の弾性限度内での応力―ひずみ特性
を検出し、この応力―ひずみ特性を記憶しておく
とともにこの応力―ひずみ特性に基づいて初期た
るみ量を求めておき、被伸延材が弾性限度を越え
て伸延されるときに前記応力―ひずみ特性に基づ
いてスプリングバツク量を求め、このスプリング
バツク量と前記初期たるみ量からその時点でのス
トレツチ量を求め、このようにして求められたス
トレツチ量に基づいてストレツチ量を制御するス
トレツチヤレベラのストレツチ量制御方法。1. When stretching a material to be stretched with a stretcher leveler, the stress-strain characteristics within the elastic limit of the material to be stretched are detected, this stress-strain characteristic is memorized, and the stress-strain characteristics are The initial amount of sag is determined, and when the material to be stretched is stretched beyond its elastic limit, the amount of spring back is determined based on the stress-strain characteristics, and the amount of spring back at that point is determined from this amount of spring back and the amount of initial sag. A method for controlling the amount of stretching of a stretcher leveler, in which the amount of stretching is determined and the amount of stretching is controlled based on the amount of stretching thus determined.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18960883A JPS6082220A (en) | 1983-10-11 | 1983-10-11 | Method for controlling stretching rate of stretcher leveler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18960883A JPS6082220A (en) | 1983-10-11 | 1983-10-11 | Method for controlling stretching rate of stretcher leveler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6082220A JPS6082220A (en) | 1985-05-10 |
| JPS6230043B2 true JPS6230043B2 (en) | 1987-06-30 |
Family
ID=16244151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18960883A Granted JPS6082220A (en) | 1983-10-11 | 1983-10-11 | Method for controlling stretching rate of stretcher leveler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6082220A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02504249A (en) * | 1987-07-22 | 1990-12-06 | ツァーンラトファブリク フリートリッヒシャフェン アクチェンゲゼルシャフト | Auxiliary force activated transmission |
-
1983
- 1983-10-11 JP JP18960883A patent/JPS6082220A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02504249A (en) * | 1987-07-22 | 1990-12-06 | ツァーンラトファブリク フリートリッヒシャフェン アクチェンゲゼルシャフト | Auxiliary force activated transmission |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6082220A (en) | 1985-05-10 |
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