FR2503030A1 - Electronic position control for electric or hydraulic press - includes real and optimum speed sensors feeding comparator which provides control signals by which continuous adjustment is made - Google Patents
Electronic position control for electric or hydraulic press - includes real and optimum speed sensors feeding comparator which provides control signals by which continuous adjustment is made Download PDFInfo
- Publication number
- FR2503030A1 FR2503030A1 FR8106501A FR8106501A FR2503030A1 FR 2503030 A1 FR2503030 A1 FR 2503030A1 FR 8106501 A FR8106501 A FR 8106501A FR 8106501 A FR8106501 A FR 8106501A FR 2503030 A1 FR2503030 A1 FR 2503030A1
- Authority
- FR
- France
- Prior art keywords
- movement
- speed
- control
- organ
- machine
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/16—Control arrangements for fluid-driven presses
- B30B15/18—Control arrangements for fluid-driven presses controlling the reciprocating motion of the ram
- B30B15/20—Control arrangements for fluid-driven presses controlling the reciprocating motion of the ram controlling the speed of the ram, e.g. the speed of the approach, pressing or return strokes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B9/00—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member
- F15B9/02—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type
- F15B9/03—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type with electrical control means
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Presses (AREA)
Abstract
Description
La présente invention a trait au domaine de la commande automatique de divers organes destinés à se mouvoir dans une machine. The present invention relates to the field of automatic control of various members intended to move in a machine.
Elle concerne plus particulièrement un nouveau procédé, et dispositif correspondant, destiné à assurer la régulation électronique de la commande de déplacement, linéaire ou rotatif, d'un organe de machine.It relates more particularly to a new method, and corresponding device, intended to ensure the electronic regulation of the movement control, linear or rotary, of a machine member.
On sait qu'il est difficile de régler avec précision et une grande fiabilité les déplacements successifs d'une pièce d'appareillage pendant sa ou ses phases de travail. Par exemple, lorsqu'on a affaire à des vérins de presse hydraulique ou électrique, le réglage de la vitesse des vérins est très délicat du fait que l'on est tributaire à chaque instant de la résistance offerte par l'organe en mouvement. We know that it is difficult to precisely and reliably adjust the successive movements of a piece of equipment during its working phase or phases. For example, when dealing with hydraulic or electric press jacks, adjusting the speed of the jacks is very delicate since one is dependent at all times on the resistance offered by the moving member.
Dans les-dispositifs de régulation électronique déjà connus, par exemple pour le cas précité de la presse à vérins : un groupe hydraulique et un ensemble de distribution, on a préconisé l'emploi de servo-valves permettant d'assurer le contrôle du déplacement de l'organe (ici un vérin) en conformité avec un parametre prédéterminé. En pratique,
ce paramètre est constitué par une pression déterminée et le groupe hydraulique à servo-valve affiche alors cette pression pour chaque mouvement de la pièce en travail. Malgré le progrès réalisé, on se heurte toujours à la difficulté de vaincre la résistance mécanique de l'organe au début et pendant son déplacement.In the electronic control devices already known, for example for the aforementioned case of the jack press: a hydraulic group and a distribution assembly, it has been recommended to use servo-valves making it possible to control the movement of the organ (here a jack) in accordance with a predetermined parameter. In practice,
this parameter is constituted by a determined pressure and the hydraulic group with servo-valve then displays this pressure for each movement of the workpiece. Despite the progress made, there is still the difficulty of overcoming the mechanical resistance of the organ at the start and during its movement.
L'invention a pour but de pallier les inconvénients précités et vise précisément un procédé électronique de régulation permettant de vaincre constamment cette résistance de l'organe pendant son déplacement, ceci dans des domaines d'application très variés tels que, à titre illustratif, la commande de ponts, de tables mobiles automatiques de presses, de vérins de presse, de dispositifs d'approvisionnement par rouleaux, etc.. The invention aims to overcome the aforementioned drawbacks and specifically aims at an electronic regulation process making it possible to constantly overcome this resistance of the organ during its movement, this in very varied fields of application such as, by way of illustration, the control of bridges, automatic mobile press tables, press jacks, roller supply devices, etc.
Selon sa définition générale, le procédé de l'invention consiste à analyser la vitesse réelle de déplacement de l'organe en la comparant avec une vitesse souhaitée préalablement enregistrée puis à corriger à chaque instant les variations constatées et à envoyer sur l'organe des ordres correspondant à cette vitesse prédéterminée qui reste rigoureusement constante quel que soit l'effort mécanique exercé sur l'organe. According to its general definition, the method of the invention consists in analyzing the actual speed of movement of the organ by comparing it with a desired speed previously recorded, then correcting at any instant the variations observed and sending orders to the organ. corresponding to this predetermined speed which remains strictly constant whatever the mechanical force exerted on the organ.
La technique consiste donc à réguler - en permanence la
vitesse désirée sur l'élément de contrôle du déplacement de la pièce de machine, ceci quelle que soit la contrainte antagoniste de l'effort, changeant à tous moments, sur cette pièce.The technique therefore consists in regulating - permanently the
desired speed on the element controlling the movement of the machine part, this regardless of the antagonistic stress of the force, changing at all times, on this part.
L'invention sera mieux comprise par la description détaillée d'un mode de réalisation d'un ensemble électEonique de régulation de commande conforme au procédé susvisé et dont le schéma de principe est illustré sur la planche de dessin annexée (figure unique). The invention will be better understood from the detailed description of an embodiment of an electronic control regulation assembly in accordance with the abovementioned method and the block diagram of which is illustrated on the attached drawing board (single figure).
Dans cet exemple non limitatif, il s'agit de la commande hydraulique du déplacement d'un organe mais le même système est valable eut directement transposable pour une commande électrique. In this nonlimiting example, it is the hydraulic control of the movement of a member but the same system is valid had directly transposable for an electric control.
On a représenté sur la gauche du dessin des éléments illustratifs de machines à contrôler et correspondant par exemple a un déplacement vertical d'organe (A), à une translation linéaire horizontale (B) ou à un mouvement rotatif (C). Un dispositif de contrôle électronique selon l'invention comporte essentiellement, dans l'application illustrée de commande hydraulique : un élément de distribution hydraulique E ; un ensemble de contrôle de déplacement ou rotation F de l'organe de machine ; un groupe hydraulique de commande D muni de filtre 1, pompe 2, régulateur de pression 3 et servo-valve 4 ; et une ensemble électronique
G de réglage, asservissement et commande de puissance qui comprend : un enregistreur 5 de la vitesse effective de l'organe en mouvement, un enregistreur 6 de la vitesse souhaitée prédéterminée avec dispositif d'affichage 7, un analyseur-compensateur 8 et un amplificateur de puissance 9.Illustrated on the left of the drawing are illustrative elements of machines to be checked and corresponding, for example, to a vertical movement of an organ (A), to a horizontal linear translation (B) or to a rotary movement (C). An electronic control device according to the invention essentially comprises, in the illustrated application of hydraulic control: a hydraulic distribution element E; a movement or rotation control assembly F of the machine member; a hydraulic control unit D fitted with filter 1, pump 2, pressure regulator 3 and servo-valve 4; and an electronic assembly
G for regulation, servo-control and power control which comprises: a recorder 5 of the effective speed of the moving member, a recorder 6 of the predetermined desired speed with display device 7, an analyzer-compensator 8 and an amplifier of power 9.
En pratique, le fonctionnement d'un tel ensemble de rEgu- lation est le suivant
L'organe de la machine (A, B ou C) est mis en mouvement par le groupe hydraulique D et le distributeur E (en position de fermeture sur la figure) et parallelement, on regle la vitesse souhaitée par le potentiomètre 7 et l'enregistreur 6. L'élément de contrôle F de déplacement de l'organe reçoit et transmet des informations relatives aux variations de vitesse accusées par l'organe de la machine en mouvement. Ces informations sont enregistrées en 5 puis analysées en 8 et enfin transmises, après amplification de puissance en 9, au servo-valve 4 du groupe D. Ce servo-valve est également piloté par le système de comparaison 6,8 amplifié en 9 qui transmet les données correspondant à la bonne vitesse préétablie.Ainsi, dès qu'il apparait un écart entre la vitesse effective de l'organe et la vitesse souhaitée pour ce dernier, le servo-valve réagit en envoyant ses ordres l'ensemble F pour rétablir le L V.Ceci fait, le servo-valve reprend sa position initiale jusqu'à ce qu'une nouvelle variation de vitesse se manifeste au niveau du déplacement, linéaire ou rotatif, de l'organe de machine. De ce fait, la vitesse de déplacement de l'organe reste constante pendant tout le travail de ce dernier, malgré les efforts et contraintes mécaniques ou autres qui peuvent s'exercer.In practice, the operation of such a set of regulations is as follows
The machine member (A, B or C) is set in motion by the hydraulic group D and the distributor E (in the closed position in the figure) and in parallel, the desired speed is adjusted by the potentiometer 7 and the recorder 6. The control element F of movement of the member receives and transmits information relating to the variations in speed experienced by the member of the machine in motion. This information is recorded in 5 then analyzed in 8 and finally transmitted, after power amplification in 9, to the servo-valve 4 of group D. This servo-valve is also controlled by the comparison system 6.8 amplified in 9 which transmits the data corresponding to the correct preset speed. Thus, as soon as there appears a difference between the effective speed of the organ and the desired speed for the latter, the servo-valve reacts by sending its orders the set F to restore the L V. This done, the servo-valve returns to its initial position until a new speed variation is manifested in the movement, linear or rotary, of the machine member. As a result, the speed of movement of the member remains constant during all of the latter's work, despite the mechanical and other stresses and stresses which may be exerted.
Les schémas de montage électrique qui comprennent notamment : l'unité d'envoi d'informations selon des paramètres intégrés avec circuits logiques, l'ensemble de détection du mouvement réel machine et le pilotage du servo-valve, ne sont pas représentés ici et font partie du domaine de l'homme de l'art, avec adaptation particulière au schéma de principe du procédé susvisé. The electrical assembly diagrams which include in particular: the unit for sending information according to integrated parameters with logic circuits, the assembly for detecting the real movement of the machine and the control of the servo-valve, are not shown here and are part of the domain of those skilled in the art, with particular adaptation to the schematic diagram of the abovementioned process.
L'ensemble derigulation selon l'inveution peut être mis en oeuvre sur toute machine commande hydraulique ou électrique et s'applique, comme dit ci-déssus, à des domaines extrêmement variés. The control assembly according to the inveution can be implemented on any hydraulic or electric control machine and applies, as said above, to extremely varied fields.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8106501A FR2503030A1 (en) | 1981-04-01 | 1981-04-01 | Electronic position control for electric or hydraulic press - includes real and optimum speed sensors feeding comparator which provides control signals by which continuous adjustment is made |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8106501A FR2503030A1 (en) | 1981-04-01 | 1981-04-01 | Electronic position control for electric or hydraulic press - includes real and optimum speed sensors feeding comparator which provides control signals by which continuous adjustment is made |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2503030A1 true FR2503030A1 (en) | 1982-10-08 |
Family
ID=9256854
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8106501A Pending FR2503030A1 (en) | 1981-04-01 | 1981-04-01 | Electronic position control for electric or hydraulic press - includes real and optimum speed sensors feeding comparator which provides control signals by which continuous adjustment is made |
Country Status (1)
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FR (1) | FR2503030A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0241161A1 (en) * | 1986-04-03 | 1987-10-14 | Massey-Ferguson Services N.V. | Valve control system and method |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1121571B (en) * | 1959-12-21 | 1962-01-11 | Schloemann Ag | Equipment on metal extrusion presses for measuring and regulating the press ram speed |
FR1508685A (en) * | 1967-01-20 | 1968-01-05 | Sp Kb Uralchermetavtomatika | Regulator of the displacement speed of the plunger of a hydraulic press |
US3630074A (en) * | 1969-03-20 | 1971-12-28 | Res Derivatives Inc | Rate control for tools |
DE2035844A1 (en) * | 1970-07-18 | 1972-01-20 | Maschinenfabrik Lauffer & Butscher, 7241 Mühlen | Hydraulic press - for powdered materials |
FR2369609A1 (en) * | 1976-10-29 | 1978-05-26 | Hunkar Laboratories | CLOSED LOOP ELECTROFLUIDIC CONTROL DEVICE |
US4222725A (en) * | 1978-02-27 | 1980-09-16 | Solid Controls, Inc. | Electro-hydraulic ram control apparatus |
-
1981
- 1981-04-01 FR FR8106501A patent/FR2503030A1/en active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1121571B (en) * | 1959-12-21 | 1962-01-11 | Schloemann Ag | Equipment on metal extrusion presses for measuring and regulating the press ram speed |
FR1508685A (en) * | 1967-01-20 | 1968-01-05 | Sp Kb Uralchermetavtomatika | Regulator of the displacement speed of the plunger of a hydraulic press |
US3630074A (en) * | 1969-03-20 | 1971-12-28 | Res Derivatives Inc | Rate control for tools |
DE2035844A1 (en) * | 1970-07-18 | 1972-01-20 | Maschinenfabrik Lauffer & Butscher, 7241 Mühlen | Hydraulic press - for powdered materials |
FR2369609A1 (en) * | 1976-10-29 | 1978-05-26 | Hunkar Laboratories | CLOSED LOOP ELECTROFLUIDIC CONTROL DEVICE |
US4222725A (en) * | 1978-02-27 | 1980-09-16 | Solid Controls, Inc. | Electro-hydraulic ram control apparatus |
Non-Patent Citations (2)
Title |
---|
EXBK/73 * |
EXBK/74 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0241161A1 (en) * | 1986-04-03 | 1987-10-14 | Massey-Ferguson Services N.V. | Valve control system and method |
US4907493A (en) * | 1986-04-03 | 1990-03-13 | Massey-Ferguson Services N. V. | Valve control system for hitch motor |
EP0414279A2 (en) * | 1986-04-03 | 1991-02-27 | Massey Ferguson S.A. | Tractor hitch control system |
EP0414279A3 (en) * | 1986-04-03 | 1991-05-15 | Massey-Ferguson Services N.V. | Tractor hitch control system |
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