EP0198055B1 - Systeme de surveillance de la position d'un element de machine - Google Patents

Systeme de surveillance de la position d'un element de machine Download PDF

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Publication number
EP0198055B1
EP0198055B1 EP85905387A EP85905387A EP0198055B1 EP 0198055 B1 EP0198055 B1 EP 0198055B1 EP 85905387 A EP85905387 A EP 85905387A EP 85905387 A EP85905387 A EP 85905387A EP 0198055 B1 EP0198055 B1 EP 0198055B1
Authority
EP
European Patent Office
Prior art keywords
follow
proximity switch
operating element
servocomponent
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.)
Expired
Application number
EP85905387A
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German (de)
English (en)
Other versions
EP0198055A1 (fr
Inventor
Eckehart Schulze
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.)
Voith Turbo H and L Hydraulic GmbH and Co KG
Original Assignee
Hartmann and Lammle GmbH and Co KG
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 Hartmann and Lammle GmbH and Co KG filed Critical Hartmann and Lammle GmbH and Co KG
Priority to AT85905387T priority Critical patent/ATE45615T1/de
Publication of EP0198055A1 publication Critical patent/EP0198055A1/fr
Application granted granted Critical
Publication of EP0198055B1 publication Critical patent/EP0198055B1/fr
Expired legal-status Critical Current

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Classifications

    • 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
    • F15B9/08—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 controlled by valves affecting the fluid feed or the fluid outlet of the servomotor
    • F15B9/12—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 controlled by valves affecting the fluid feed or the fluid outlet of the servomotor in which both the controlling element and the servomotor control the same member influencing a fluid passage and are connected to that member by means of a differential gearing
    • 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/002—Drive of the tools
    • 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/24—Perforating, i.e. punching holes
    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/28—Means for indicating the position, e.g. end of stroke
    • F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
    • F15B15/2861—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT using magnetic means

Definitions

  • the invention relates to a device for monitoring the position of a machine element, e.g. of the machine head of a processing machine which, during the processing of a workpiece, executes feed and retraction movements towards and away from the latter, for the control of which an electrohydraulic drive device is provided, which has an electrical setpoint specification and mechanical actual value.
  • Value feedback working overflow control valve includes and with the other generic features mentioned in the preamble of claim 1.
  • the preamble of claim 1 is based on the prior art known from DE-A-2501761.
  • limit switches that can be switched over by an actuating element that moves with the tool.
  • Monitoring with limit switches is difficult, however, because such switches have to be adjusted very precisely and, depending on the nature of the workpiece and the tool itself, must be able to be adjusted very precisely to different stroke paths.
  • the response behavior of limit switches can change after prolonged use, so that readjustments may also be necessary if a machine is always used with a certain type of tool and only for machining one and the same type of workpiece.
  • the object of the invention is therefore to provide a device of the type mentioned at the outset which ensures simple and precise adjustment of the tool position to be monitored and, in cases in which the tool executes its feed and retraction movements with a high repetition frequency in periodically running work cycles enables significant reduction in cycle times.
  • the monitoring of a specific position of the tool in the vicinity of an end or dead center of the tool movement marked by the setpoint value is achieved in that the distance of the control valve actuator from its basic position is monitored, and if this distance is a predeterminable, defined minimum value falls below, which is equivalent to the fact that the tool approaches the dead center, which triggers the position-characteristic monitoring signal of a proximity switch.
  • the device according to the invention has the advantage that the monitoring device can be adapted very precisely to the stroke distances to be carried out by the tool by electronically specifying suitable end position setpoints and without complex adjustment or adjustment work.
  • the monitoring device is easily sensitive to changes in the position of the valve actuating element and thus also high precision position actual value monitoring can be reached.
  • the setpoint specification is controlled in such a way that an end position is specified that is beyond the end position that must be reached by the tool and the proximity switch is set so that the actual position display signal arrives shortly before the tool reaches its required position Has carried out a working stroke and then the display signal of the proximity switch then triggers the setpoint specification for the retraction movement, otherwise settling times that would otherwise have to elapse and would elapse before the tool had reached its setpoint end position, could be said be cut linen This is of great advantage in particular for periodically operating machines, since the cycle times can be drastically reduced, as a result of which increased efficiency of a machine equipped with the device according to the invention is achieved.
  • a device according to the invention by means of which, as is required, for example in the case of a molding press or an embossing machine, is intended to monitor the running-in of the workpiece into an end position which can be reached precisely, can also be controlled with respect to the setpoint value specification in such a way that a larger one than that actually corresponding setpoint specification is made for the continuous stroke and as soon as the actual position display signal of the proximity switch indicates that the tool is in the immediate vicinity of its position linked to the desired workpiece deformation, the setpoint specification is withdrawn to this position.
  • the required feed times can be shortened as a result.
  • claim 2 outline the basic structure of a proximity switch that can be used within the scope of the device according to the invention, which is more detailed as specified by the features of claims 3 and 4, with the aid of a Hall generator as a switching element, alternatively as by Features of claim 5 specified, can be realized with the help of one or more light barriers.
  • the design of the proximity switch according to the features of claim 6 has the advantage that the proximity switch can be easily adapted to the flow characteristics of various follow-up control valves in a simple manner.
  • claim 7 indicate possible uses of the device according to the invention, for which its use is particularly advantageous from the point of view of shortening the cycle time.
  • FIGS. 1 and 1b To explain the device according to the invention shown in detail in FIGS. 2 and 3 for monitoring the actual position value of a tool which can be driven by means of a hydraulic drive device, e.g. a punching tool or a press bear, reference is first made to FIGS. 1 and 1b, on the basis of which the purpose of the device 10 according to the invention is explained in advance:
  • an overall designated 13 electrohydraulic follow-up control valve is known for the control of the rapid feed, load feed and rapid retraction movements, which is provided with electrical Setpoint specification and mechanical actual value feedback works.
  • the overrun control valve is designed as a 4 / 3 -way valve with a total of four valve inserts, which have independently adjustable control edges.
  • these valve inserts are designed as cone seat valves 16, 17, 18 and 19; these valves can be controlled in pairs by axially displacing a valve actuating member 14 into an open or flow-through position, the open control being carried out against the action of return springs.
  • piston valves could also be provided instead of cone seat valves.
  • the two working spaces 22 and 23 of the drive cylinder 11 are alternatively connected to the P high-pressure outlet of the hydraulic pressure supply source or the tank T thereof.
  • the flow position of the follow-up control valve designated I is assigned to the rapid and load feed movements of the punching tool 12 and the flow position designated 11 to the rapid retraction movements of the punching tool 12 and the piston 24 of the drive cylinder 11.
  • the position setpoint value specification is done by stepper motor-controlled rotation of a spindle nut 26 which is rotatably mounted in a sleeve 27 which is in the direction of the longitudinal axis 28 of the valve housing 29 arranged in this in the axial direction back and forth, but is not rotatable relative to the housing.
  • a spindle nut 26 which is rotatably mounted in a sleeve 27 which is in the direction of the longitudinal axis 28 of the valve housing 29 arranged in this in the axial direction back and forth, but is not rotatable relative to the housing.
  • the actual value feedback of the position of the piston 24 of the drive cylinder 11 or of the punching tool 12 driven by this takes place via a rack and pinion drive designated overall by 32, the rack 33 of which also carries out the movements of the piston 24 and the pinion 34 with one Feedback spindle 36 is rotatably connected, which in turn is not slidably mounted in the housing 29 of the follow-up control valve in the axial direction.
  • This feedback spindle 36 meshes, in the special embodiment shown, via threaded balls 37 with an internal thread of the spindle nut 26.
  • the function of the follow-up control valve 13, as far as its construction is concerned, is that the rotational movements of the feedback spindle 36, mediated by the rack and pinion drive 32, cause deflections of the valve actuator 14 Which are directed in the opposite direction to the movements of the spindle nut 26 given by the position setpoint, with the result that, if the actual position and the position value are the same, the valve actuating element 14 is in its basic position shown in FIG. 1b 0 is located.
  • the device 10 according to the invention for the target / actual value monitoring of the position of the tool 12 is designed such that it detects this basic position of the valve actuating member 14 or responds to positions of the valve actuating member 14 which it assumes when the tool is still in a defined position Distance eg from its end position which is characteristic of the completion of a work cycle.
  • FIGS. 2 and 3 To explain the structure of the target / actual value monitoring device 10, reference is now made to FIGS. 2 and 3, and express reference is again made to their details:
  • the basic / actual value monitoring device 10 is, in terms of its basic structure, a proximity switch which generates a characteristic signal when the valve actuating element 14 after it has traveled through a distance linked to a specific following error A s due to the position / target value specification F- or F-2 was deflected from its basic position, returns to its basic position, which is the case, for example, in the final phase of the work feed movement when the target value specification in the sense of the tool feed has ended.
  • the drive cylinder 11 runs with a settling time T determined by the loop gain of the control loop, which is determined by the relationship is gradually entered into the position determined by the final value of the setpoint specification, K v in the above relationship denoting the loop gain of the follow-up control loop and A x the permissible position error which still exists after the settling period has elapsed or can be accepted, whereby this position error is smaller than the step size of the setpoint specification.
  • This pick-up time can be reduced in practical cases due to e.g. with a switchover from rapid operation to load operation, the reduction in the circular gain can be very large and, in extreme cases, amount to a multiple of the time required for the rapid feed and the load feed of the punching tool 12. In order not to have to wait for this settling time, but after the tool 12 has carried out its working stroke, i.e. e.g. has penetrated the workpiece 38 (cf. FIG.
  • the target / actual value monitoring device is further designed such that the proximity switch, designated as a whole by 40, outputs an output signal which switches the drive device 11, 13 from the load feed - Switches to rapid retraction mode, already generated when the valve actuator 14 has not yet reached its basic position, which would be characteristic of the equality of the actual position and the desired position value, but still in a small one , a fraction of its maximum deflection, defined distance from this basic position.
  • the proximity switch designated as a whole by 40
  • a circular disk 41 is provided as an actuating element for the proximity switch 40, which disk can be rotated on the housing 29 of the follow-up control valve about an axis 42 which is perpendicular to the longitudinal axis 28 of the follow-up control valve 13, along which the displacement movements of the valve actuator 14 take place.
  • this longitudinal axis 28 of the follow-up control valve runs perpendicular to the plane of the drawing.
  • the valve actuator 14 is drive-coupled to the actuator 41 via a finger clutch 43, the clutch finger 44 of which extends laterally from the axis of rotation 42 of the actuator 41 of the proximity switch 40, such that Deflections of the valve actuator 14 are implemented in rotations of the disc 41, which take place in the direction of arrow 46 of FIG. 3.
  • the disk-side coupling element 47 of the finger coupling is designed as a U-shaped spring steel bracket, one leg of which is inserted into a radial bore of the rotary shaft 48 of the disk 41 and is in play-free engagement with the coupling finger 44 of the finger coupling 43, this bracket delimiting an elongated hole 49, which enables the compensatory movements between the disk 41 and the clutch finger 44 that are required when the disk 41 rotates.
  • the disk 41 has a radius R, which in typical deflection is approximately five times larger than the distance between the axis 42 of the bearing shaft 48 and the central axis 51 of the clutch finger 44. This means that the deflection of the edges 52 and 53 an edge-open recess 54 of the disk 41 five times larger than the axial deflections E , and 82 of the valve actuating member 14. With this translation, the position of the valve actuating member 14 by means of the proximity switch 40, which is within a range of 0.5 mm Angular movements of the edges 52 and 53 of the recess 54 responds to be measured to an accuracy of 1/10 mm
  • this comprises a Hall generator 56, in the working magnetic field H of which, as indicated by the arrow 57, transversely directed to the disk 41, the outer edge 58 of the disk protrudes, it being assumed that this
  • the output signal of the Hall generator 56 is a high level signal when the disk edge 58 is in the region of the magnetic field 57 and a low level output signal when the edge recess 54 of the disk 41 enters the magnetic field 57.
  • edges 52 and 53 of the U-shaped edge recess 54 are arranged with respect to the radial center plane 59 of the edge recess 54 so that the change in the output signal level of the Hall generator 56 in both possible directions of rotation 46 of the disk occurs when the valve actuator 14, seen in the two alternative directions of displacement, each at the same distance from its home position.
  • the recess 54 can also be designed in such a way that the proximity switch, when the valve actuating element moves towards its basic position in alternative directions, responds at different distances from the basic position.
  • a pane with a recess 54 which is open at the edge
  • a pane with a radially projecting wing can also be used.
  • a light barrier instead of a Hall generator, the luminous flux of which can be interrupted either by the pane edge 58, 52, 53 or by a radial wing provided instead of a recess 54.
  • Inductive or capacitive proximity switches can also be used in the context of a target / actual value monitoring device according to the invention.
  • the punching tool 12 first moves towards the workpiece 38 at a constant speed, touching the top of the workpiece 38 at time t.
  • the target value specification already corresponds to the working stroke, that is to say that if the actual position corresponded to the target value specification, the tool 12 would have already pierced the workpiece 38 and its punching edge at the level of the lower boundary surface of the workpiece 38 would run.
  • the downward stroke of the tool 12, which corresponds to an end position 63 below the workpiece 38 is also predetermined by the setpoint value specification.
  • a target is targeted, as it were, "below" the workpiece 38 so that the drive device drives the tool 12 into the workpiece 38 with full force.
  • the setpoint value is kept at a constant value which corresponds to an end position of the tool 12 below the workpiece 38, thus a position which the tool only takes after a relatively long settling time period, ie approximately at the point in time t 5 would achieve, since from the time t 2 the speed of the tool 12, with which it approaches the position determined by the target value specification, decreases exponentially.
  • the monitoring device 10 is now set so that it changes its output signal level when the tool 12 has pierced the workpiece 38, which is the case at time t 3 . From this point on, a retraction movement of the workpiece is specified by the setpoint value setting device, as by the ascending branch 64 of the target value curve 61 is illustrated, wherein at time t 4 equality of target value and actual value is achieved.
  • the retraction movement of the tool 12 can be initiated immediately thereafter. It is not waited until the tool 12 has run into a position marked by the setpoint value specification, but the settling time is “cut off”, so to speak, and the fact that the workpiece is already at a point in time, for example the point in time t 5 in its starting position for the next work cycle may have reached, to which it would otherwise only have reached its target position predefined from time t 2 .
  • target value specification and position / actual value feedback explained and used according to the invention to this extent is particularly advantageous when the work movements that the tool 12 has to carry out must be carried out periodically in the shortest possible cycle times, as is the case, for example, is the case with a nipple machine. In such an application, it is not important to know when exactly the position required for achieving the work result — punching through the workpiece 38 — has been reached, but only that this position has been reached.
  • the device 10 according to the invention can, however, also be used to indicate when a position of the tool 12 required for achieving the work result has been reached, ie, for example, when the stroke required to achieve a specific workpiece deformation in an embossing press has been completed, beyond that the tool 12 should not be moved.
  • the device 10 according to the invention is set in such a way that the position-characteristic output signal of the monitoring device 10 is triggered when the tool has carried out the major part of its stroke required for the desired workpiece deformation and can therefore be assumed to be in the course of the the settling time determined by the loop amplification of the follow-up control loop will also reliably reach its end position corresponding to the target value specification.
  • the monitoring device 10 is therefore set such that the change in its output signal level in the illustration in FIG. 4 occurs at a point in time t 5 'at which the tool has reached a position which practically corresponds to the target end position.
  • FIG. 5 shows the development over time of the target value specification in dash-dotted lines and the development over time of the actual position of the pressing tool in dash-dotted lines.
  • the line 66 running parallel to the time axis — the abscissa of the diagram — marks the position of the pressing tool in which it touches the workpiece, coming from above during load operation, which is the case at time t 2 .
  • the straight line 67 running parallel to the abscissa represents the end position of the tool to be reached, which the tool must achieve in order to achieve the desired permanent deformation of the workpiece.
  • the target value specification corresponds to this position for the first time, represented by the curve 61 '.
  • the setpoint value specification continues beyond this point in time t 1 and the point in time t 2 to larger values until the setpoint value specification sets a stroke of the tool up to the point in time t 3 Is reached "below" the position to be reached.
  • the tool has t 3 at this time. as represented by the actual value curve 62 ', this end position has certainly not yet been reached. From the point in time t 3 , the setpoint value specification is kept at the constant value represented by the curve section 61 ".

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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)
  • Drilling And Boring (AREA)

Abstract

Un système de surveillance de la position d'un élément de machine, dont l'entraînement est doté d'un système d'entraînement hydraulique qui, pour la commande des mouvements de va-et-vient de cet élément de machine, comporte une valve de réglage de poursuite fonctionnant avec une indication de la valeur de consigne, commandée électriquement, et avec annonce mécanique de la position réelle; le système de surveillance est équipé d'un dispositif de transformation mécanique qui transforme les déviations du servoélément de la valve de réglage de poursuite (14) en déviations plus grandes, liées à celles-ci, de l'élément mécanique de travail d'un interrupteur de proximité (40) qui, vu dans le sens de son élément de travail, est disposé à une distance spécifique par rapport à la position assumée par l'élément de travail lorsque le servoélément de la valve de réglage de poursuite (14) se trouve dans sa position caractéristique de base pour l'équivalence de la valeur de consigne et la valeur réelle. L'interrupteur à proximité envisagé est un générateur Hall (56), dans l'ouverture de champ duquel s'étend le rebord d'un bras de commutation (41) qui peut être entraîné en rotation par les mouvements de déviation du servoélément (14) de la valve de réglage de poursuite.

Claims (7)

1. Dispositif (10) pour la surveillance de la position d'un élément de machine (12), par exemple d'une tête d'une machine d'usinage, qui exécute, au cours de l'usinage d'une pièce à usiner, des mouvements d'avancée et de recul, jusqu'à la pièce et à partir de la pièce, mouvements pour la commande desquels est prévu un dispositif moteur électro-hydraulique (11, 13) qui comprend une vanne pilote d'asservissement (13) travaillant avec pré-détermination d'une valeur de consigne électrique et information en retour d'une valeur réelle mécanique, vanne qui présente un organe de réglage (14) qui peut être dévié, au moyen de la pré-détermination de la valeur de consigne, à partir d'une position de base dans laquelle il se trouve si la valeur de consigne et la valeur réelle sont égales, et qui ainsi commande des soupapes (16-19) par lesquelles s'écoulent des courants de fluide de travail proportionnels à la déviation, courants par lesquels le dispositif moteur (11) est sollicité dans le sens d'une égalisation de la valeur réelle à la valeur de consigne, étant entendu que des déviations de l'organe de réglage (14) dans des directions alternatives par rapport à la position de base correspondent également à des sens de mouvement alternatifs de l'élément de machine, caractérisé en ce qu'un engrenage de transmission mécanique (43, 48, 41) est prévu qui transforme des déviations de l'organe de réglage (14) de la vanne pilote d'asservissement (13) en des déviations -plus grandes- corrélatives d'un organe de commande mécanique (41) d'un détecteur de proximité (40), qui, en regardant dans la direction de la déviation de son organe de commande mécanique (41 est disposé à une distance déterminée de la position que prend l'organe de commande mécanique (41, 54) quand l'organe de réglage (14) se trouve dans sa position de base.
2. Dispositif suivant la revendication 1, caractérisé en ce que, comme organe de commande mécanique (41) pour le détecteur de proximité (40), on a prévu une ailette (41) pouvant être entraînée en rotation par les mouvements de déviation de l'organe de réglage (14), ailette (41) qui présente sur son bord (58) un évidement (54) ou une saillie, dont l'entrée dans l'élément fonctionnel (40), placé à poste fixe, du détecteur de proximité (40, 41) peut déclencher le signal de sortie caractérisant la position.
3. Dispositif suivant la revendication 1 ou la revendication 2, caractérisé en ce que l'organe de réglage (14) de la vanne pilote d'asservissement (13) est réalisé comme organe de commande de soupape pouvant glisser en avant et en arrière le long de son axe, organe qui, par l'intermédiaire d'une transmission par un doigt (43), est entraîné avec un arbre (48), monté dans le carter (29), tournant autour d'un axe (42) dirigé perpendiculairement à la direction de coulissement de l'organe de commande de soupape (14), et en ce que, sur une section de cet arbre (48) ressortant du carter de vanne (29), a été fixé un organe de commande (41) en matériau ferro-magnétique, organe qui peut s'introduire dans le champ magnétique (57) de service d'un générateur de Hall (40).
4. Dispositif suivant la revendication 3, caractérisé en ce que l'organe de commande (41) du détecteur de proximité (40,41) est constitué d'un disque rond, ou d'un secteur de disque, dont le bord (58) pénètre dans la zone d'une fente traversée par le champ magnétique (57) de service du générateur de Hall (40) et en ce que le bord de ce disque (41) est prévu avec une échancrure (54) qui pénètre dans le cas d'un rapprochement de l'organe de réglage (14) de la vanne pilote d'asservissement (13) de sa position de base.
5. Dispositif suivant la revendication 1, caractérisé en ce que l'élément fonctionnel (40), placé à poste fixe, du détecteur de proximité (40) comporte un barrage photo-électrique, dont une interruption du flux lumineux, ou la libération d'un flux lumineux, résultant d'une déviation de l'organe de commande mécanique (41), déclenche le signal de sortie du détecteur, caractérisant la position.
6. Dispositif suivant l'une quelconque des revendications précédentes, caractérisé en ce qu'on peut régler la position du détecteur de proximité (40), position dans laquelle celui-ci émet son signal d'indication de position établissant un lien avec le rapprochement de l'organe de réglage (14) de la vanne pilote d'asservissement (13).
7. Dispositif suivant l'une quelconque des revendications précédentes, caractérisé par leur mise en application dans le cas de presses, pour surveiller que l'on a atteint une position limite prédéterminée, ou, dans le cas de l'entraînement de machines, par exemple de machines à estamper, qui travaillent avec une répétition fréquente des cycles de production, pour contrôler qu'au cours du cycle de travail, une position d'outil déterminée a été occupée.
EP85905387A 1984-10-20 1985-10-19 Systeme de surveillance de la position d'un element de machine Expired EP0198055B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85905387T ATE45615T1 (de) 1984-10-20 1985-10-19 Einrichtung zur ueberwachung der position eines maschinenelementes.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3438600 1984-10-20
DE19843438600 DE3438600A1 (de) 1984-10-20 1984-10-20 Einrichtung zur ueberwachung der position eines maschinenelements

Publications (2)

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EP0198055A1 EP0198055A1 (fr) 1986-10-22
EP0198055B1 true EP0198055B1 (fr) 1989-08-16

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Application Number Title Priority Date Filing Date
EP85905387A Expired EP0198055B1 (fr) 1984-10-20 1985-10-19 Systeme de surveillance de la position d'un element de machine

Country Status (4)

Country Link
EP (1) EP0198055B1 (fr)
JP (1) JPH0736960B2 (fr)
DE (2) DE3438600A1 (fr)
WO (1) WO1986002414A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103016459A (zh) * 2012-12-20 2013-04-03 中国船舶重工集团公司第七一九研究所 一种机液伺服的液压缸自动复位和顺序控制装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3914860A1 (de) * 1989-05-07 1990-11-08 Hartmann Hans Hydraulische antriebsvorrichtung
DE4412224A1 (de) * 1994-04-09 1995-10-12 Graebener Pressensysteme Gmbh Presse für eine Kaltverformung von Metallwerkstücken
DE102007054533C5 (de) 2007-11-15 2012-04-05 Hoerbiger Automatisierungstechnik Holding Gmbh CNC-Stanzmaschine

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DE2501761C3 (de) * 1975-01-17 1979-04-12 Hartmann & Laemmle Gmbh & Co Kg, 7255 Rutesheim Elektrohydraulischer Nachlaufverstärker
DE2714550A1 (de) * 1977-04-01 1978-10-05 Vdo Schindling Manometer in flachprofilbauweise
GB2050627B (en) * 1979-05-16 1983-09-21 Ransome Hoffmann Pollard Mechanical assemblies employing sensing means for sensing motion or position

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103016459A (zh) * 2012-12-20 2013-04-03 中国船舶重工集团公司第七一九研究所 一种机液伺服的液压缸自动复位和顺序控制装置
CN103016459B (zh) * 2012-12-20 2015-04-29 中国船舶重工集团公司第七一九研究所 一种机液伺服的液压缸自动复位和顺序控制装置

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WO1986002414A1 (fr) 1986-04-24
JPH0736960B2 (ja) 1995-04-26
DE3572386D1 (en) 1989-09-21
DE3438600C2 (fr) 1992-03-26
EP0198055A1 (fr) 1986-10-22
DE3438600A1 (de) 1986-07-10
JPS62501401A (ja) 1987-06-11

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