EP0820823B1 - Dispositif de contrÔle, notamment pour machines de formage - Google Patents

Dispositif de contrÔle, notamment pour machines de formage Download PDF

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Publication number
EP0820823B1
EP0820823B1 EP97110898A EP97110898A EP0820823B1 EP 0820823 B1 EP0820823 B1 EP 0820823B1 EP 97110898 A EP97110898 A EP 97110898A EP 97110898 A EP97110898 A EP 97110898A EP 0820823 B1 EP0820823 B1 EP 0820823B1
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EP
European Patent Office
Prior art keywords
contact element
displacement member
workpiece
evaluation circuit
pickup
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
EP97110898A
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German (de)
English (en)
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EP0820823A1 (fr
Inventor
Peter Bodmer
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Bodmer Kuesnacht AG
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Bodmer Kuesnacht AG
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Publication date
Application filed by Bodmer Kuesnacht AG filed Critical Bodmer Kuesnacht AG
Publication of EP0820823A1 publication Critical patent/EP0820823A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B21J15/10—Riveting machines
    • B21J15/28—Control devices specially adapted to riveting machines not restricted to one of the preceding subgroups
    • B21J15/285—Control devices specially adapted to riveting machines not restricted to one of the preceding subgroups for controlling the rivet upset cycle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B21J15/10—Riveting machines
    • B21J15/12—Riveting machines with tools or tool parts having a movement additional to the feed movement, e.g. spin

Definitions

  • the invention relates to a device according to the preamble of claim 1 for checking at least one receiving part and one part of it recorded and by material deformation with the Receiving part connectable workpiece, the workpiece over a top of the receiving part around a certain one Survival dimension survives.
  • a device is especially for mechanical mechanical material deformation thought.
  • DE-C2-37 15 905 describes a method for mechanical Production of riveted joints known. According to this Procedure is carried out before the material deformation checked by means of the riveting tool (so-called striker), whether the rivet, i.e. the workpiece to be deformed, is present and, if so, whether its length is within a given Tolerance range. In this well-known Procedure is assumed that the at least one receiving part, through which the rivet extends to to protrude at the top is also present.
  • EP-A-0699490 there is a device according to the preamble of claim 1 described with the before the material deformation it is checked whether the protrusion of the to be deformed Workpiece over the receiving part within a predetermined tolerance range.
  • the recording part and the Workpiece approached.
  • Distance traveled can then be at known starting positions the path difference and thus the excess be determined.
  • the invention has for its object a device of the type mentioned at the beginning, with which an improved Quality assurance, what they go through with each other Material deformation related parts to be achieved is, the effort to determine the path of both probes and to determine the placement of the feelers should be minimized.
  • a first variant of the invention is used to achieve the above object Device of the type mentioned that the combination of the characteristics of the characteristic part of claim 1.
  • the workpiece to be deformed and the at least one recording part that the deforming workpiece or that of the workpiece to be deformed Work part is penetrated by means of separate Sensing organs detected.
  • a first probe moves starting from a starting position towards the recording part to, after covering a first distance to contact the receiving part. At this moment is the further advance of the first probe organ prevented.
  • the driving force with which the first probe organ being advanced is far from sufficient to when contacting the first receiving part deform or damage.
  • the organ to be deformed is scanned.
  • the second probe organ also moves outwards a starting position towards the workpiece, to do this after covering a second distance to contact.
  • the Relative position of both sensing elements determined. With knowledge the starting positions of both probes and by measuring the distances covered by both sensing elements the path difference between the distances covered of the two sensing elements can be determined. The on this Way difference determined is compared with the protrusion dimension compared to the workpiece to be deformed the at least one receiving part or, in the case of several receiving parts, via the one closest to the sensing elements top receiving part survives; because with the two touch organs is just the two tactile organs facing top of the arrangement of to be deformed Workpiece and receiving part or receiving parts approached been. The determined path difference represents that Actual protrusion dimension. The path difference with the given (Target) overhang dimension compared, can under Considered a tolerance range whether the actual protrusion dimension exceeds the tolerance range deviates from the target overhang dimension.
  • Both sensing elements can be moved linearly on a holding part led that movable in the direction of the support surface is. Both sensing elements are via a gear Motion-coupled, and that when the first probe has touched down on the receiving part.
  • the holding part is moved in the direction of the contact surface.
  • the sliding part advances as a result of the relative movement, so that the sliding part, which together with the holding part is moved forward, another movement is superimposed is, which is why the sliding part relative to Holding part moves.
  • the detector detects from the beginning of the Movement of the holding part to the movement of the sliding part. From the moment of touchdown of the first probe the feed speed of the sliding part increases, whereby the touch probe is placed on the Recording part is detectable. There is only one for this qualitative feed speed detection of the sliding part required. According to the above arrangement the first variant is only a single detector to determine the starting point from both probes their starting position up to their touchdown covered distances required. Putting on the first probe organ is due to the speed increase of the sliding part detected while putting on the second probe by detecting the standstill of the Sliding part (even the holding part does not move then more) is recognized.
  • the device according to the invention can be both the presence of the deformed Workpiece (e.g. rivet) as well as the presence detect the at least one receiving part, wherein moreover according to the invention a statement to that effect is made whether the detected parts are acts in relation to each other (under Consideration of tolerances) target dimensions in Have direction of movement of the sensing elements.
  • the deformed Workpiece e.g. rivet
  • the standstill of the second sensing element is expedient determined by the fact that the output signal of the the advance movement of the relevant sensing element Detector no longer changed.
  • the The second probe organ also comes to a standstill by measuring mechanical stresses of the holding elements and movably supported machine frame can be determined. This is because it hits what is being moved with a certain force second probe on the workpiece to be contacted the driving force leads to detectable mechanical stresses in the overall construction. Exceeds the measured mechanical stress has a threshold value, so this suggests that the subject Touch probe has put on.
  • the (voltage) detector determines the mechanical tension when attaching the second probe on the workpiece when the distance by which the first Probe considered the second in the direction of movement advanced, is larger than the expected overhang of the Workpiece relative to the receiving part.
  • the most important advantage of the invention is that they are directly in a forming machine, for example, a riveting machine can be realized.
  • the deformation or riveting tool takes over the function of the (second) sensing element for detection of the material to be deformed Workpiece or rivets.
  • Rivet heads are then relative to this in the direction of movement slidably mounted the other (first) probe and the displacement part detected by the path / speed detector arranged.
  • the contact area of the first sensing element rushes the surface with which the riveting tool the rivet hits, more than that expected projection size.
  • the actual deformation of the Rivets in particular take place when the riveting tool is moving, which is either a wobble (Wobble riveting) or along one Trochoids, especially a hypotrochoid (radial riveting) emotional.
  • the feed force with which the Riveting tool is advanced until it touches the rivet can be equal to the pressure with which this is moving riveting tool is pressed against the rivet.
  • the Riveting tools can also be used with less force be moved forward to bear against the rivet. It is also possible without moving the riveting tool, d. H. at stationary riveting tool, through a pure pressing process to deform the rivet. In this case too Invention applicable.
  • the relative dimensions of the workpiece and the receiving part in the direction of movement of the sensing elements also the absolute dimensions of the workpiece and the receiving part in the direction of movement of the feelers (workpiece length in the direction of movement of the feelers and thickness of the or the receiving parts) by means of the detector from each of the two sensing elements covered distances determined.
  • the moving part is at rest by its movement Advance movement of the holding part with the fixed on the support frame arranged detector the advance movement of the sliding part determined.
  • the moment the Speed of the advance of the sliding part has increased what is detected by the detector first touch organ placed on the receiving part.
  • the height of the receiving part be determined.
  • the forward movement of the sliding part continues with the Detector detects until it detects that the sliding part no longer moves forward. At this moment then put on the second probe.
  • the distance traveled by the sliding part up to the feed rate increase and the advance movement of the sliding part until it stops (at increased feed rate) can then be known the feed rate until the first one touches down Sensing element and the feed rate until touchdown of the second probe organ the height of the workpiece be determined. If appropriate tolerance ranges are specified error signals are then output for the case that the workpiece or the receiving part or parts an out of tolerance extension in Have direction of movement of the sensing elements.
  • the one that remains scanning the workpiece remains Probe also during the mechanical deformation of the Workpiece in contact with this. From the beginning of the then the additional travel distance becomes mechanical deformation measured, which continues with a certain pressure second probe attached to the workpiece as a result the compression of the workpiece in the direction of movement Touch organs covered.
  • This error message says that the Material of the workpiece to be deformed is too soft (replace the additional route before a minimum time has elapsed - Minimum time period) or is too hard (even if one The maximum time span is the target additional distance from the second probe has not been replaced). With this Checks can thus be made about the quality of the Make the material of the workpiece.
  • the displacement measurement of the sliding part by measuring the time periods that elapse until the sliding part starting from its starting position its feed rate increases or starts from this time to a standstill. Furthermore, the Takes into account the speed at which this Sliding part in the individual phases of its feed path emotional. These speeds are fundamental known, because on the one hand it is known with which Speed in the case of a riveting machine the rivet head connected to the holding part, and to is known to others at what speed about the gearbox relative to the holding part itself moving part with the first stationary Moving probe forward.
  • the first probe and the sliding part each has a rack and that the gear as gear rotatably mounted on the holding part, that combs with both racks.
  • the detector expediently scans the sliding part optically from.
  • the Sliding part has a toothing. This toothing can then also for mechanical motion coupling from the first feeler and sliding part to the gear wheel trained gears can be used.
  • the first is Probe on a holding part in the direction of the support surface as well as displaceable opposite
  • the Holding part is movable together with the second probe.
  • a sliding part is arranged on the holding part Direction to the contact surface and opposite to it is slidably guided on the holding part. Via a transmission is the sliding part with both the first probe and also mechanically coupled to the holding part.
  • This Gear ensures that the sliding part when moving of the holding part in the direction of the bearing surface of the Holding part is taken until the first probe on of the contact surface. Then the sliding part is for a predetermined distance of the holding part relative to the support frame.
  • the holding part After the holding part has covered the predetermined distance, it will Sliding part of the holding part during its further movement in the direction of the contact surface until the second touch organ is placed on the support surface. In this The moment is both the movement of the holding part as well of the sliding part ended.
  • the sliding part by the Gearbox when the holding part moves in the direction of the Support surface moved forward by a first distance until the first touch organ is placed on the support surface. Subsequently, the holding part moves around the predetermined one Distance further; this takes the holding part however, the sliding part is not included. Rather, it stands Sliding part relative to the support frame still. Only after the holding part covered the predetermined distance it takes the sliding part with it again, until has placed the second probe on the support surface.
  • the movement of the sliding part takes place in two Movement sections. Both movement sections are from a detector of the displacement sensor arrangement. This On the one hand, detector detects whether the sliding part is moving becomes or stands still, and secondly to what extent that Moving part is moved. The difference between the two Movements of the sliding part is a measure of the protrusion.
  • the advantage of the second variant of the invention The device can be seen in that the two measuring sections, around which the sliding part moves when the Holding part is moved in the direction of the support surface, through the intermediate resting phase of the sliding part are separated from each other.
  • the detector and the evaluation circuit recognize from the intermediate resting phase how long the respective distances that the sliding part are covered.
  • the distinction is metrological of these two routes in the second variant of the Invention easier to implement than the first Variant, based on the speed at which the sliding part moves, it is detected whether the first or has placed a second probe.
  • the sliding part between two springs is arranged, one of which is a spring on the sliding part and is supported on the holding part and the sliding part with a pretensioning force directed at the bearing surface acted upon while the second spring between the Sliding part and the first sensing element is arranged and on the first sensing element on the support surface exerted biasing force.
  • the first spring points a lower preload than the second spring on.
  • the sliding part between two stops of the Holding part is displaceable, both stops in the direction of movement of the holding part follow each other and the first stop is arranged closer to the support surface than the second stop.
  • the first spring is like this arranged that they the sliding part preloaded against the first stop.
  • the sliding part can be against the biasing force of the first spring move against the second stop.
  • the first probe is slidable on out the sliding part and in by the second spring Biased towards the bearing surface.
  • the sliding part has a toothing that is optically scanned by the detector.
  • the linear movement of the sliding part in a Rotational movement of a meshing with the sliding part Gear are implemented, the rotation of which is a measure for the displacement of the sliding part.
  • the covered The route is either direct or indirect by determining the length of time for which the sliding part moved and based on the speed with the the holding part is moved forward.
  • the evaluation circuit interprets putting the first probe on the Contact surface based on the first standstill of the previous one moving sliding part that with the beginning of the movement of the Holding part has been moved from its starting position.
  • the second probe is placed in the evaluation circuit recognized at the time the detector the next, d. H. second standstill of the sliding part reports. Based on the distances that the sliding part starting from its starting position to the first Standstill and starting from the first standstill until second standstill, the excess length can then can be determined by difference.
  • the evaluation circuit is expediently based on a comparison of the at the first standstill of the sliding part present output signal of the detector with a setpoint taking into account the starting position of the sliding part determines whether the extension of the receiving part in the direction of movement of the holding part is outside a tolerance range. Is that the case, this result is sent to the display device indicating signal (error signal) output.
  • the evaluation circuit based on a comparison of the second time the Sliding part present output signal of the detector with a setpoint taking into account the shift position of the sliding part at the moment of taking of the first standstill determines whether the extension of the Workpiece in the direction of movement of the holding part outside within a tolerance range. If this is the case, then to the display device to indicate this fact Signal (error signal) output.
  • the second variant of the invention preferably directly in a cold forming machine, for example a riveting machine realize.
  • the second probe organ Deformation tool for the mechanical deformation of the workpiece.
  • the deformation tool is on a rotatable Tool head arranged, which is slidable on the support arm guided and drivable in the direction of the support surface is what is particularly pneumatic, hydraulic or done mechanically.
  • the invention use with a wobble riveting machine.
  • FIG. 1 is a longitudinal section as an example of a device for the mechanical execution of mechanical cold forming processes a riveting machine 10, partly in Longitudinal section, shown.
  • the riveting machine 10 has one Support frame 12 or a frame that has a bearing surface 14 and a vertical support arm 16 which with the support surface 14 is connected and at right angles from this protrudes upwards.
  • On the support arm 16 is a machine housing 18 attached.
  • a pneumatic piston 20 slidably mounted. Of the Piston 20 is parallel to the extension of the support arm 16 at right angles in the direction of the contact surface 14 and conversely axially movable.
  • the piston 20 has one radially outwardly projecting flange 22, which is in a cavity 24 of the machine housing 18 moves when the piston 20 is moved.
  • the cavity 24 is with a pneumatic pressure line 26 and one pneumatic vent line 28 connected.
  • At Supply of compressed air via the pressure line 26 is the Piston 20 against the force of a (not shown)
  • the spring is advanced in the direction of the bearing surface 14.
  • the piston 20 is hollow and points to it axial ends of internal pivot bearings 30, 32 for a rotatably drivable drive shaft 34.
  • the drive shaft 34 extending axially through the piston 20 extends, contributes to its facing the support surface 14 a tool holder or rivet head 36, which holds a riveting tool 38 (striker).
  • the striker is at the lower end facing away from the drive shaft 34 of the tool holder 36 held clamped.
  • That up End 40 of the drive shaft projecting from the piston 20 34 is designed as a polygonal profile and one cross-sectionally identical sleeve 42 added.
  • the top End 40 is slidably received by sleeve 42.
  • the sleeve 42 is rotatably supported and by one driven at 34 indicated electric motor.
  • the riveting machine 10 described here is a wobble or radial riveting machine in which the cold deformation of a workpiece to be deformed Applying a pressing force with which the riveting tool 38 presses against the workpiece to be deformed, and at the same time Tumbling or rotating movement of the riveting tool 38 he follows.
  • a recording is shown at 46, the the bearing surface 14 rests and is fastened there.
  • the In turn, receptacle 46 carries the rivets to be riveted together Parts.
  • the workpiece to be deformed is a Threaded stud 48, which is a tapered riveting tool 38 opposite bolt end 50 and one a threaded portion 54 carrying an internally threaded bore 52 having.
  • the tapered section 50 extends through an opening in a receiving part 56 indicated at 56.
  • the one protruding from the tool holder 36 or the riveting tool 38 Part of the tapered threaded bolt section 50 is caused by cold forming using the riveting tool deformed into the so-called closing head, the protrudes radially through the opening in the receiving part 56 and towering over it radially.
  • the tool holder 36 and the riveting tool 38 facing top 58 of the riveted Arrangement of threaded stud 48 and receiving part 56 has the necessary for the material deformation Survived 60 on.
  • a receiving part 56 in the form of a Plate
  • the riveted joint ensures that the threaded stud is held in this case 48 on the receiving part 56, which is for example a plate.
  • the conventional Senses are used to rivet several parts together connect to. In such an application would a rivet z.
  • two plate-shaped receiving parts connect with the head of the rivet to the a receiving part rests and the rivet shaft through aligned openings in both or the extends several receiving parts.
  • Holding part 62 attached, approximately laterally in addition to the rivet head 36 holding the riveting tool 38 is arranged.
  • On the holding part 62 is one in the direction of the double arrow 64 slidably mounted sensing element 66 arranged, which has a toothing or rack 68.
  • gear 70 on the holding part 62, that meshes with the rack 68 of the sensing element 66.
  • Sliding part 72 in the direction of the double arrow 74 movably mounted. This sliding part 74 has one Teeth or a rack 76 on the gear 70 combs.
  • the racks 68 and 76 run parallel to each other and face each other, with the gear 70 disposed between them.
  • Firmly with the vertical support arm 16 of the support frame 12 is a Optical detector 78 arranged above the holding part 62 is arranged and the toothing 76 of the sliding part 72 recorded. When the sliding part 72 moves detector 78 generates pulses in accordance with the passing teeth 76.
  • the axial distance a between these two Areas, d. H. the distance of these two surfaces in Direction of movement of the piston 20 is greater than that (Actual) projection b by which the tapered section 50 of the Threaded stud 48 over the top 58 of the receiving part 56 survives.
  • the machine 10 has one in the form of a Strain gauge present voltage detector 81 for Measurement of mechanical stresses of the support frame 12.
  • the function of this voltage detector 81 will continue below.
  • the two detectors 78 and 81 are connected to an evaluation circuit 82 which the output signals of the displacement detector 78 and the Voltage detector 81 receives.
  • the evaluation circuit 82 is also electrically connected to the motor 44, to control it, especially to switch it on and off.
  • the evaluation circuit 82 is also a Display / data input device 84 connected, the one Display part 86 and a keypad 88 for data entry having.
  • the evaluation circuit 82 is included Control valves 90.92 for the pressure line 26 and the vent line 28 connected to release these lines or to block.
  • the riveting machine 10 check the phase immediately before the cold forming process, whether the parts to be riveted together of the support surface 14 or in the receptacle 46 of the support surface 14 are whether the (actual) projection b taking into account of tolerances corresponds to a specified target value and whether the parts to be riveted the required Have nominal dimensions. To check all these requirements the riveter 10 operates as follows.
  • the advancement of the piston 20 takes place at that moment its (at least preliminary) end in which the end face 74 is placed on the threaded stud 48.
  • This Touchdown is recognized in the evaluation circuit 82. It will namely between the machine housing 18 and the Support arm 16 a mechanical stress in response to the driving force still acting on the piston 20 at adjust the riveting tool 38 to the threaded stud 48.
  • detector 81 measures this rising mechanical tension. This is in the evaluation circuit 82 Measuring signal of the detector 81 compared with a threshold. Exceeds the output of detector 81 the threshold value is interpreted by the evaluation circuit 82 this as a placement of the riveting tool 38 on the Threaded stud 48.
  • the Actual projection b is greater than or less than or equal to that Target overhang is.
  • one too tolerance range entered into the evaluation circuit 82 can be used to make a statement as to whether the Actual projection b within the specified tolerance located. If this is not the case, the Evaluation circuit an error signal indicating this state, a corresponding optical one on the display 86 Generated ad; in addition, an acoustic Display. Otherwise, the working cycle of the Riveting machine 10 canceled.
  • the next step is to check whether the threaded stud 48 and the receiving part 56 the predetermined Extentions in the direction of movement of the Have piston 20.
  • the distance covered is first Total distance of the piston 20 determined. This happens based on the signals from the detector 78, the advance of the sliding part 72 up to the point of contact of the piston 20 has detected. With the piston 20 in a known starting position relative to the support surface 14 or to the receptacle 46 then determined based on the total distance covered which axial length of the threaded stud bolts 48 has.
  • the Thickness extension in direction of movement 94
  • the so determined Value is also given taking into account Tolerances compared to a setpoint to check that the thickness of the receiving part 56 is within the tolerance lies. If this is not the case, the Evaluation circuit 82 indicating this state optical and / or acoustic error signal. Furthermore, the working cycle of the riveting machine 10 is interrupted.
  • the evaluation circuit 82 switches the electric motor 44 for rotation of the riveting tool 38.
  • the contact pressure with which the piston 20 against the threaded stud 48 is held down there is a Cold working and upsetting the protruding tapered Section 50 of the threaded stud 48.
  • the additional Displacement of the piston 20, which this due to Cold deformation of the threaded stud 48 can, if desired, metrologically via the Detector 78 can be detected, the advance of the sliding part 72 recorded.
  • the switch-on of the electric motor 44 in the evaluation circuit 82 take a time measurement.
  • the device 100 according to this second embodiment except for the coupling of the first sensing element 66 with the The holding part 62 has the same structure as the device 10 in FIG Fig. 1 to 3, which is why in Figs. 4 to 9, if possible, for identical or functionally identical elements of the device 100 the same reference numerals as in FIGS. 1 to 3 are used.
  • the displacement path of the displacement part 104 in the recess 102 is through an upper stop 108 and a limited lower stop 110. Both stops 108 and 110 lie in the direction of movement 94 of the piston 20 and thus of the holding part 62. Between the upper stop 108 and a first helical compression spring acts on the sliding part 104 112, the sliding part 104 against the prestresses lower stop 110. From below through the The lower stopper 110 protrudes into the first sensing element 66 Recess 102 and the sliding part 104 into it.
  • the first sensing element 66 points at its in the sliding part 104 protruding end on a flange 114, the abuts a stop 116 of the sliding part 104, whereby the first sensing element 66 cannot be lost on the sliding part 104 is arranged.
  • a second coil compression spring 118 arranged on the one hand on the sliding part 104 and on the other hand on the flange 114 of the first Probe organ 66 supports and the first probe organ 66th biased against the stop 116 of the sliding part 104.
  • the biasing force applied by the first spring 112 is less than the biasing force of the second spring 118.
  • FIG. 4 shows the initial situation of the device 100, before the piston 20 in the direction of arrow 94 in Moved towards the bearing surface 14.
  • the piston 20 moves together with the holding part 62 in the direction of arrow 94.
  • the sliding part 104 moves relative to the gear 106 of the detector 78 and drives it so that the Detector 78 the amount of movement of the sliding part 104 can detect.
  • FIG. 5 shows the situation in which the first sensing element 66 rests on the receiving part 56.
  • the sensing element 66 can now no longer move along; the first feeler pushes through the spring 118 66 now the sliding part 104 within the recess 102 opposite to direction 94 upwards, and against the biasing force of the spring 112, the weaker is designed as the spring 118.
  • the sliding part 104 according to the intermediate position Fig. 6 in contact with the upper stop 108 of the recess 102, which is shown in Fig. 7, the Spring 112 is compressed.
  • the detector 78 measures the amount of displacement of the Sliding part 104 starting from the position shown in FIG Fig. 4 until reaching the position of FIG. 5, wherein the placement of the first sensing element 66 based on the standstill the one previously moved in the direction of arrow 94 Sliding part 104 is recognized.
  • the path differences are evaluated in the device 100 as in connection with the embodiment the fig. 1 to 3 explained above.

Claims (18)

  1. Dispositif de contrôle d'au moins une pièce réceptrice et d'une pièce à déformer qui est partiellement reçue par elle et peut se relier à la pièce réceptrice par déformation du matériau, dans lequel la pièce à déformer déborde, d'une cote de débordement prescrite déterminée, au-delà d'une face supérieure de la pièce réceptrice, comportant:
    un cadre porteur (12) qui présente une surface d'appui (14) pour la pièce à déformer (14) ainsi que la pièce réceptrice (56) dont il y a au moins une et un bras porteur (16),
    un premier organe palpeur (66) guidé avec liberté de se déplacer en direction (94) de la surface d'appui (14),
    un second organe palpeur (78) guidé sur le bras porteur (16) avec liberté de se déplacer en direction (94) de la surface d'appui (14),
    un appareil émetteur de course (78) pour mesurer la course relative dont les deux organes palpeurs (66, 38) se sont déplacés l'un par rapport à l'autre, en comparaison de leur positions initiales au début d'un prédéplacement en direction (94) de la pièce réceptrice (56) et de la pièce à déformer (48) jusqu'à l'arrêt,
    un circuit de traitement (82) qui est relié à l'appareil émetteur de course (78) et qui, à l'aide d'une comparaison entre la course relative et une valeur prescrite représentant la cote de débordement prescrite, en tenant compte d'une plage de tolérance, détermine si la course relative s'écarte, de la valeur de la plage de tolérance, de la valeur prescrite et, si c'est le cas, produit un signal signalant une erreur, et
    un dispositif de signalisation, relié au circuit de traitement (82), pour la signalisation, en particulier acoustique et/ou visuelle, du signal signalant une erreur, dans lequel
    le premier organe palpeur (66) est guidé sur une pièce de maintien (62) avec liberté de coulisser en direction de la surface d'appui (14) ainsi que dans le sens opposé, et
    la pièce de maintien (62) peut se déplacer avec le second organe palpeur (38),
    caractérisé par le fait,
    que le premier organe palpeur (66) est mécaniquement relié, par l'intermédiaire d'un mécanisme (70), avec une pièce coulissante (72) qui est guidée sur la pièce de maintien (62) avec liberté de coulisser en direction de la surface d'appui (14) ainsi qu'en sens opposé, dans lequel le mécanisme (70) convertit le déplacement du premier organe palpeur (66) qui se fait dans une première direction en un déplacement de la pièce coulissante (72) dans une direction opposée à la première direction,
    que l'appareil émetteur de course est muni d'un détecteur, relié au cadre porteur (12), pour déterminer la course dont la pièce coulissante (72) s'est déplacée dans son prédéplacement et pour déterminer la vitesse avec laquelle la pièce coulissante (72) s'est déplacée dans son prédéplacement, et
    que le circuit de traitement (82)
    reconnaít que le premier organe palpeur (66) s'est posé à l'instant où le détecteur (78) annonce une augmentation de vitesse de la pièce coulissante (72), et reconnaít que le second organe palpeur (38) s'est posé à l'instant où le détecteur (78) annonce l'arrêt de la pièce coulissante (72), et
    mesure la durée qui s'écoule entre ces deux instants et, à l'aide de cette durée, détermine la différence de course des deux organes palpeurs (66, 38),
  2. Dispositif selon la revendication 1, caractérisé par le fait que le premier organe palpeur (66) présente une crémaillère (68), que la pièce coulissante (72) présente une crémaillère (76) et que le mécanisme est conçu sous forme d'un pignon (70) qui engrène avec les deux crémaillères (68, 76) et qui est porté, avec liberté de rotation, sur la pièce de maintien (62).
  3. Dispositif selon la revendication 1 ou 2, caractérisé par le fait que le premier organe palpeur (66) ou la pièce coulissante (72) collabore avec un organe élastique de rappel (96) pour rappeler le premier organe palpeur (66) et la pièce coulissante (72), qui se sont déplacées depuis leurs positions initiales dans leur position initiale respective, dans lesquelles le premier organe palpeur (66) et le second organe palpeur (38) ne viennent en contact ni avec la pièce réceptrice (56) ni avec la pièce à déformer (60).
  4. Dispositif selon la revendication 3, caractérisé par le fait qu'aussi bien le premier organe palpeur (66) qu'également la pièce coulissante (72) collaborent chacun avec un organe élastique de rappel (96).
  5. Dispositif selon l'une des revendications 1 à 4, caractérisé par le fait que la pièce coulissante (72) présente une denture (76) qui peut être optiquement détectée par le détecteur (78).
  6. Dispositif selon l'une des revendications 1 à 5, caractérisé par le fait qu'à l'aide d'une comparaison entre le signal de sortie du détecteur (78), existant lors de l'arrêt du premier organe palpeur (62), et une valeur prescrite, en tenant compte de la position initiale du premier organe palpeur (66), le circuit de traitement (82) détermine si l'extension de la pièce réceptrice (56) dans la direction du déplacement (94) du premier organe palpeur (66) se situe à l'extérieur d'une plage de tolérance, et, si c'est le cas, envoie au dispositif de signalisation (86) un signal signalant ce résultat.
  7. Dispositif selon l'une des revendications 1 à 6, caractérisé par le fait qu'à l'aide d'une comparaison entre le signal de sortie du détecteur existant lors de l'arrêt du second organe palpeur (38), et une valeur prescrite, en tenant compte de la position initiale du second organe palpeur (38), le circuit de traitement (82) détermine si l'extension de la pièce à déformer (48) dans la direction du déplacement du second organe palpeur (38) se situe à l'extérieur d'une plage de tolérance et, si c'est le cas, envoie au dispositif de signalisation (86) un signal signalant ce résultat.
  8. Dispositif selon l'une des revendications 1 à 7, caractérisé par le fait que le second organe palpeur (38) est un outil de déformation pour déformer mécaniquement la pièce à déformer (48) et que l'outil de déformation est disposé sur une tête d'outil rotative (36) qui est guidée, avec liberté de coulissement, sur le bras porteur (16) et qui peut avancer en direction de la surface d'appui (14) et ceci en particulier par voie pneumatique, hydraulique ou mécanique.
  9. Dispositif selon l'une des revendications 1 à 8, caractérisé par le fait que sur le cadre porteur (12) est prévu, pour déterminer des contraintes mécaniques, un détecteur (81) qui est relié au circuit de traitement (82) et que, pour déterminer si le second organe palpeur (38) s'est posé sur la pièce à déformer (48), le circuit de traitement (82) compare le signal de sortie du détecteur (81) avec une valeur de seuil.
  10. Dispositif selon l'une des revendications 1 à 9, caractérisé par le fait que le circuit de traitement (82) détermine le signal de modification du détecteur (78) de l'appareil émetteur de course et, pour déterminer si le second organe palpeur (38) s'est posé sur la pièce à déformer (48), compare le signal de modification avec une valeur de seuil.
  11. Dispositif selon le préambule de la revendication 1,
    caractérisé par la fait
    qu'est prévu une pièce de coulissement (104) qui peut coulisser sur la pièce de maintien (62), en direction de la surface d'appui (14) ainsi qu'en sens opposé, qui, lors d'un déplacement de la pièce de maintien (62) en direction de la surface d'appui (14), peut, par l'intermédiaire d'un mécanisme (108-116) se déplacer avec elle jusqu'à ce que le premier organe palpeur (66) se pose, puis peut s'arrêter pendant une course prédéterminée de la pièce de maintien (62) lors de la poursuite du déplacement de cette pièce par rapport au cadre porteur (12), puis, ensuite lors de la poursuite du déplacement de la pièce de maintien (62) en direction de la surface d'appui (14), peut à nouveau se déplacer avec la pièce de maintien (62) jusqu'à ce que le second organe palpeur (38) se pose,
    que le dispositif émetteur de course est muni d'un détecteur (78) pour déterminer si la pièce coulissante (104) se déplace avec la pièce de maintien (62) ou si elle est arrêtée par rapport au cadre porteur (12), et pour déterminer les courses dont se déplace chaque fois la pièce coulissante (104) en partant d'une position de repos jusqu'à ce que le premier organe palpeur (66) ou le second organe palpeur (38) se pose,
    que le mécanisme présente un premier ressort (112) qui est disposé entre la pièce de maintien (62) et la pièce coulissante (104) et qui exerce sur la pièce coulissante (50) une force de précontrainte orientée vers la surface d'appui (14),
    que le mécanisme présente en outre un second ressort (118) qui est disposé entre la pièce coulissante (104) et le premier organe palpeur (66) et qui exerce sur le premier organe palpeur (66) une force de précontrainte également orientée vers la surface d'appui (14) et donc, sur la pièce coulissante (104), une force de précontrainte opposée à la force de précontrainte du premier ressort (112), la force de précontrainte du premier ressort (112) étant inférieure à celle du second ressort (118),
    que la pièce coulissante (104) peut coulisser entre deux butées (108, 110) de la pièce de maintien (102), la première butée (110) étant disposée plus près de la surface d'appui (14) que la seconde butée (108) et le premier ressort (112) précontraignant la pièce coulissante (104) en direction de la première butée (110),
    que le premier organe palpeur (66) est guidé, avec liberté de coulissement, sur la pièce coulissante (104) et qu'il est précontraint, par le second ressort (78), en direction de la surface d'appui (14), en direction d'une butée (116) de la pièce coulissante (104) et
    que le circuit de traitement (82)
    reconnaít que le premier organe palpeur (66) s'est posé à l'instant où le détecteur (78) annonce le premier arrêt de la pièce coulissante (104), précédemment en mouvement, et reconnaít que le second organe palpeur (38) s'est posé à l'instant où le détecteur (78) annonce l'arrêt de la pièce coulissante (104), et
    mesure les durées des déplacements de la pièce coulissante (104) entre chaque fois le début de son déplacement et l'arrêt ainsi que la durée pendant laquelle la pièce coulissante (104) s'arrête la première fois, et, a' l'aide de la vitesse de déplacement de la pièce de maintien (62), mesure la course de la pièce coulissante (104) jusqu'à ce que le premier organe palpeur (106) se pose et la course de la pièce coulissante (104) jusqu'à ce que le second organe palpeur (38) se pose, et, en tenant compte de la course parcourue par le second organe palpeur (38) pendant l'arrêt de la pièce coulissante (104), détermine la différence de course des deux organes palpeurs (66, 38).
  12. Dispositif selon la revendication 11, caractérisé par le fait que le détecteur (78) détermine également la vitesse du déplacement de la pièce coulissante (104).
  13. Dispositif selon la revendication 11 ou 12, caractérisé par le fait que la pièce coulissante (104) présente une denture (76) que le détecteur (78) peut détecter optiquement.
  14. Dispositif selon l'une des revendications 11 à 13, caractérisé par le fait qu'à l'aide d'une comparaison du signal de sortie du détecteur (78) existant lors du premier arrêt de la pièce coulissante (104) et d'une valeur prescrite, en tenant compte de la position initiale du premier organe palpeur (66), le circuit de traitement détermine si l'extension de la pièce réceptrice (56) dans la direction du déplacement (94) du premier organe palpeur (66) se situe à l'extérieur d'une plage de tolérance et, si c'est le cas, envoie au dispositif de signalisation (86), un signal signalant ce résultat.
  15. Dispositif selon l'une des revendications 11 à 14, caractérisé par le fait qu'à l'aide d'une comparaison entre le signal de sortie du détecteur existant lors du second arrêt de la pièce coulissante (104) et d'une valeur prescrite, en tenant compte de la position initiale du second organe palpeur (38), le circuit de traitement (82) détermine si l'extension de la pièce à déformer (48) dans la direction du déplacement du second organe palpeur (38) se situe à l'extérieur d'une plage de tolérance et, si c'est le cas, envoie au dispositif de signalisation (86) un signal signalant ce résultat.
  16. Dispositif selon l'une des revendications 11 à 15, caractérisé par le fait que le second organe palpeur (38) est un outil de déformation pour déformer mécaniquement la pièce a déformer (48) et que l'outil de déformation est disposé sur une tête d'outil rotative (36) qui est guidée, avec liberté de coulissement, sur le bras porteur (16) et qui peut avancer en direction de la surface d'appui (14) et ceci en particulier par voie pneumatique, hydraulique ou mécanique.
  17. Dispositif selon l'une des revendications 11 à 16, caractérisé par le fait que sur le cadre porteur (12) est prévu, pour déterminer des contraintes mécaniques, un détecteur (81) qui est relié au circuit de traitement (82) et que, pour déterminer si le second organe palpeur (38) s'est posé sur la pièce à déformer (48), le circuit de traitement (82) compare le signal de sortie du détecteur (81) avec une valeur de seuil.
  18. Dispositif selon l'une des revendications 11 à 17, caractérisé par le fait que le circuit de traitement (82) détermine le signal de modification du détecteur (78) de l'appareil émetteur de course et, pour déterminer si le second organe palpeur (38) s'est posé sur la pièce à déformer (48), compare le signal de modification avec une valeur de seuil.
EP97110898A 1996-07-25 1997-07-02 Dispositif de contrÔle, notamment pour machines de formage Expired - Lifetime EP0820823B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29612903U 1996-07-25
DE29612903 1996-07-25

Publications (2)

Publication Number Publication Date
EP0820823A1 EP0820823A1 (fr) 1998-01-28
EP0820823B1 true EP0820823B1 (fr) 1999-09-29

Family

ID=8026972

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97110898A Expired - Lifetime EP0820823B1 (fr) 1996-07-25 1997-07-02 Dispositif de contrÔle, notamment pour machines de formage

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EP (1) EP0820823B1 (fr)
AT (1) ATE185095T1 (fr)
DE (1) DE59700494D1 (fr)
ES (1) ES2138418T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102152171A (zh) * 2011-05-03 2011-08-17 苏州工业园区高登威科技有限公司 一种机床行程检测装置

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19812133A1 (de) * 1998-03-20 1999-09-23 Baltec Maschinenbau Ag Verfahren zum Steuern, Überwachen und Überprüfen eines Umformvorganges einer Umformmaschine, insbesondere Nietmaschine
DE10332474A1 (de) * 2003-07-16 2005-02-24 Baltec Maschinenbau AG, Pfäffikon Verfahren zum Verbinden von Bauteilen mittels Nieten
CN102248448A (zh) * 2011-05-03 2011-11-23 苏州工业园区高登威科技有限公司 一种机床行程检测装置
DE202012012292U1 (de) * 2012-12-28 2014-04-04 Kmt Produktions + Montagetechnik Gmbh Taumel- oder Radialpunktnietmaschine
DE202013000092U1 (de) * 2013-01-09 2014-04-10 Kmt Produktions + Montagetechnik Gmbh Werkzeugmaschine für Nietarbeiten
DE102014200962A1 (de) * 2014-01-21 2015-07-23 Bayerische Motoren Werke Aktiengesellschaft Fügevorrichtung, vorzugsweise zum Setzen von Nieten, zum Clinchen oder zum Stanzen
CH712279A1 (de) * 2016-03-18 2017-09-29 Baltec Maschb Ag Vorrichtung zur Beaufschlagung eines Verbindungselements mit einer Beaufschlagungskraft.

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0699490B1 (fr) * 1994-09-01 1998-03-04 Bodmer Küsnacht AG Dispositif de commande, en particulier pour machines de formage

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102152171A (zh) * 2011-05-03 2011-08-17 苏州工业园区高登威科技有限公司 一种机床行程检测装置

Also Published As

Publication number Publication date
ES2138418T3 (es) 2000-01-01
DE59700494D1 (de) 1999-11-04
ATE185095T1 (de) 1999-10-15
EP0820823A1 (fr) 1998-01-28

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