EP0730920B1 - Apparatus for lifting one of the rollers of a highly dynamic transport system with integrated measuring of plate thickness - Google Patents

Apparatus for lifting one of the rollers of a highly dynamic transport system with integrated measuring of plate thickness Download PDF

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Publication number
EP0730920B1
EP0730920B1 EP96103019A EP96103019A EP0730920B1 EP 0730920 B1 EP0730920 B1 EP 0730920B1 EP 96103019 A EP96103019 A EP 96103019A EP 96103019 A EP96103019 A EP 96103019A EP 0730920 B1 EP0730920 B1 EP 0730920B1
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EP
European Patent Office
Prior art keywords
rocker
roller
constructed
way
eccentric
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.)
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EP96103019A
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German (de)
French (fr)
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EP0730920A1 (en
Inventor
Siegfried Schwarz
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Raiffeisenbank Wangen
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JENTRON Electronic GmbH
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Priority claimed from DE19507396A external-priority patent/DE19507396C2/en
Priority claimed from DE1995133697 external-priority patent/DE19533697C2/en
Application filed by JENTRON Electronic GmbH filed Critical JENTRON Electronic GmbH
Publication of EP0730920A1 publication Critical patent/EP0730920A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B65H20/02—Advancing webs by friction roller
    • 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
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
    • B21D43/08—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by rollers
    • B21D43/09—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by rollers by one or more pairs of rollers for feeding sheet or strip material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/20—Location in space
    • B65H2511/22—Distance

Definitions

  • the invention relates to a device for intermediate ventilation upper roller of a highly dynamic roller feed system for feeding a material strip in presses, Stamping or similar machines according to the generic term of Claim 1.
  • Such a device is known from the prior art known from DE 38 10 663 C2.
  • a roller feeder with a mechanism for intermittent Driving the rollers described to a between material roll clamped to the rollers around a certain Advance length.
  • the gap width between the rollers to be able to adjust is the upper roller of the roller feed system including their drive on one Swing arm mounted so that it can move. It is possible lift the top roller through air vents to the material band to be able to introduce.
  • the intermediate ventilation takes place by actuating an eccentric, which is arranged at an axial end of the rocker, as well as one provided on the upper side of the rocker Actuator.
  • a spring also engages the swing arm, the the rocker in the direction of the roller below.
  • the gap width is set via the actuator only mechanically by turning one on the actuator attacking mother, making it necessary for intermediate ventilation required time is increased and the required precision not guaranteed when setting the gap width can be.
  • the invention is based on this prior art the task of creating a device with which on the one hand a quick, precise and not manual adjustment the swing arm carrying the upper feed roller and at the same time a constant monitoring of the sheet thickness tolerance is obtained.
  • the actuator as a roll lifting element at least one over an AC motor positionable mechanical lifting element attacks, its positioning by a circuit-based connection of the AC motor with the respective one Machine control takes place.
  • Another advantage of the new device is that by continuously determining the thickness of the continuous Metal band malfunctions, such as tool breakage be avoided.
  • Figures 1 and 2 show the basic structure of a new device for lifting an upper roller 7 of a highly dynamic roller feed system 1 for feeding a material strip 1a in presses, punches, or the like.
  • the advantage of the new device for intermediate ventilation of the upper roller 2 of a highly dynamic roller feed system 1 is that the rocker arm 5 carrying the upper feed roller 2 is assigned an actuator 5d or 5d 'on its upper side, with the interposition of pressure elements 9, on which at least one roller ventilation element engages a spindle 7 that can be positioned via an AC motor 8a.
  • the design can alternatively also be selected such that the actuator 5d 'is also designed as a rocker arm with the same pivot point 5a, at the swinging end 5b of which the positioning spindles 7, 7a act, preferably an arrangement of two spindles 7 , 7c at a mutual horizontal distance a from one another is provided on a common shaft 8, at one end of which the AC motor 8a is seated (FIG. 3).
  • the assignment of at least one limit stop 10 to the top of the free swing end 5b completes the structural design here, as does a circuit-like connection of the AC motor 8a for the roll ventilation with the respective machine control.
  • the new device can thus be almost instantaneous working, accurate to the usual stroke rates Switching the roller ventilation on and off can be obtained and thereby higher stroke rates of the respective press or punch.
  • the motor 8a starts up when the intermediate ventilation is ended also takes place without counterforce from the bellows cylinder 9. Only when finishing the positioning is in the force 0.2 against the direction of travel last 0.2 mm. It thus supports the braking of the engine.
  • the roller contact pressure is the first P of the bellows cylinder 9 both for quick opening the rollers for intermediate ventilation as well as for fast Closing used at the end of the intermediate ventilation. So far, the intermediate ventilation has always been against this force P. performed what significant response delays of the entire system as well as high wear of the structural Control elements resulted.
  • Figures 4 and 5 show the basic structure of a device for lifting the upper roller 2 of a highly dynamic roller feed system 1 for feeding a material strip 1a for presses, punches, etc. Machines where the upper driven Roller 2 is mounted on a rocker 5 so that it can move in height is and via the roller lifting elements 7 on the pressure plate 5d the positioning is carried out.
  • the position reached is now also assumed by the upper roller 2 via the rocker 5.
  • the distance between the upper and lower rollers 2 and 3 now corresponds to the programmed material thickness.
  • the strip would lie loosely between the two rollers 2 and 3;
  • 0.5mm immersion depth at item 5e means that the distance between the upper and lower rollers adjusts to the material thickness of 1a -0.5mm .
  • the rocker 5 When the material 1a is moved in between the feed rollers 2 and 3, the rocker 5 will move upwards by 0.5 mm against the pressure of the bellows cylinder 9; the full contact pressure of the bellows cylinder 9 is thus present on the material band.
  • the adjusting drive designed as an eccentric 7, 10 consists of a pressure bearing 10 with a bearing block 10 'seated on the top of the pressure plate 5d of the rocker 5 and with a bracket 7 "on the feed housing attached drive disc 7 'containing the eccentric 7, the pressure bearing 10 positively engaging in the raceway of the eccentric 7 via a roller 10a held in a pressure lever 7a. It is important here that the eccentric guide track 7 is raised to the drive disc 7' or in the latter recessed interior or exterior shape.
  • the new device can also simultaneously determine the thickness of the metal strip 1a passing through; this is a very important criterion for avoiding malfunctions, such as tool breakage, when working with metal on presses and punches.
  • This is solved by a sensor 11 on the free end piece 5b of the rocker 5 and a measuring flag 12 fixedly arranged at a distance opposite the sensor 11 at the front on the rocker 5, as a monitoring element for maintaining the factory-guaranteed upper tolerance range of the sheet metal material, in the circuitry of the invention Linking the sensor 11 to the machine control for the purpose of stopping the machine or feed when the permissible strip thickness is exceeded.
  • the measuring device shown here does not require any mechanical i.e. manual setting. It is in the machine control programmed with the basic data of the feed, i.e. the feed length, speed, acceleration, Strip thickness, intermediate ventilation and also the strip thickness tolerance from e.g. +/- 0.05mm. All data is stored under the Part number of the respective tool saved.
  • the mechanics of the measuring apparatus is the feed with the elements the intermediate ventilation itself. It only becomes an additional one Distance sensor in e.g. optical or inductive or capacitive of an analog type. So it is not an additional mechanism with generally relatively large space requirements.
  • the basis of the measurement method for determining the thickness of the continuous metal ribbon 1a with the new device is that by possibly different material thickness of the belt, the movable rocker 5 with the top roller (Lower roller of the feed is fixed) accordingly raised with plus tolerance and with minus tolerance is discontinued. Since the swing top 5b and 5d on the programmed value, there is a relative change in distance between swing arm 5 and swing arm upper part 5b and 5d.
  • a programming example can look like this: a) Strip thickness (fixed stop) 3.8 mm b) Intermediate ventilation 0.5 mm c) Strip thickness tolerance +/- 0.05 mm
  • the limit values d1 and d2 can correspond to the corresponding one Part number can be saved. At the start of production with a new tool can be called up after the relevant part numbers Start the controlled punching operation immediately.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Rollers For Roller Conveyors For Transfer (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)

Abstract

The appts. for lifting of the top roll (2) which is mounted on a pivotable link (5) joined to roll lifting elements (7). On top, with interposed thrust units (9), the link is joined with an adjustment member (5d). The adjustment member is connected to at least one mechanical lifting elements which is positionable by means of an AC motor (8a).

Description

Die Erfindung betrifft eine Vorrichtung zum Zwischenlüften der oberen Walze eines hochdynamischen Walzenvorschubsystems zum Zuführen eines Materialbandes bei Pressen, Stanzen oder ähnlichen Maschinen nach dem Oberbegriff des Anspruches 1.The invention relates to a device for intermediate ventilation upper roller of a highly dynamic roller feed system for feeding a material strip in presses, Stamping or similar machines according to the generic term of Claim 1.

Aus dem Stand der Technik ist eine derartige Vorrichtung aus der DE 38 10 663 C2 bekannt. Dort wird eine Walzenzuführungseinrichtung mit einem Mechanismus zum intermittierenden Antreiben der Walzen beschrieben, um ein zwischen den Walzen festgeklemmtes Materialband um eine bestimmte Länge vorzuschieben. Um die Spaltbreite zwischen den Walzen einstellen zu können, ist die obere Walze des Walzenvorschubsystems einschließlich ihres Antriebs auf einer Schwinge höhenbeweglich gelagert. Es ist dadurch möglich, die obere Walze durch Zwischenlüften anzuheben, um das Materialband einführen zu können.Such a device is known from the prior art known from DE 38 10 663 C2. There is a roller feeder with a mechanism for intermittent Driving the rollers described to a between material roll clamped to the rollers around a certain Advance length. The gap width between the rollers to be able to adjust is the upper roller of the roller feed system including their drive on one Swing arm mounted so that it can move. It is possible lift the top roller through air vents to the material band to be able to introduce.

Das Zwischenlüften erfolgt durch die Betätigung eines Exzenters, der an einem axialen Ende der Schwinge angeordnet ist, sowie über ein an der Oberseite der Schwinge vorgesehenes Stellglied. An der Schwinge greift außerdem eine Feder an, die die Schwinge in Richtung der untenliegenden Walze beaufschlagt. Das Einstellen der Spaltbreite über das Stellglied erfolgt ausschließlich mechanisch durch Drehen einer am Stellglied angreifenden Mutter, wodurch die für das Zwischenlüften erforderliche Zeitdauer erhöht ist und die geforderte Präzision bei der Einstellung der Spaltbreite nicht sicher gewährleistet werden kann.The intermediate ventilation takes place by actuating an eccentric, which is arranged at an axial end of the rocker, as well as one provided on the upper side of the rocker Actuator. A spring also engages the swing arm, the the rocker in the direction of the roller below. The gap width is set via the actuator only mechanically by turning one on the actuator attacking mother, making it necessary for intermediate ventilation required time is increased and the required precision not guaranteed when setting the gap width can be.

Ausgehend von diesem Stand der Technik liegt der Erfindung die Aufgabe zugrunde, eine Vorrichtung zu schaffen, mit der einerseits eine schnelle, präzise und nicht manuelle Einstellung der die obere Vorschubwalze tragenden Schwinge erzielt wird und gleichzeitig eine ständige Überwachung der Blechdickentoleranz erhalten wird.The invention is based on this prior art the task of creating a device with which on the one hand a quick, precise and not manual adjustment the swing arm carrying the upper feed roller and at the same time a constant monitoring of the sheet thickness tolerance is obtained.

Zur Lösung dieser Aufgabe wird vorgeschlagen, daß an dem Stellglied als Walzenlüftelement mindestens ein über einen AC-Motor positionierbares mechanisches Hubelement angreift, wobei dessen Positionierung durch eine schaltungsgemäße Verknüpfung des AC-Motors mit der jeweiligen Maschinensteuerung erfolgt. To solve this problem it is proposed that the actuator as a roll lifting element at least one over an AC motor positionable mechanical lifting element attacks, its positioning by a circuit-based connection of the AC motor with the respective one Machine control takes place.

Die Unteransprüche beinhalten dabei vorteilhafte Detailausgestaltungen, spezielle Einzelheiten und Alternativausführungen.The subclaims contain advantageous detailed configurations, special details and alternative designs.

Vorteilhaft ist, daß durch geeignete elektronisch angesteuerte, mechanische Bauteile eine möglichst verzögerungsfreie, gradgenaue Ein- und Ausschaltung des Walzen-Lüftvorganges erreicht und damit eine höhere Pressen- bzw. Stanzhubzahl sowie eine höhere Prozeßsicherheit erzielt wird.It is advantageous that by means of suitable electronically controlled, mechanical components with the least possible delay, accurate to the degree Switching on and off of the roller lifting process achieved and thus a higher number of presses or punching strokes as well higher process reliability is achieved.

Ein weiterer Vorteil der neuen Vorrichtung besteht noch darin, daß durch eine kontinuierliche Ermittlung der Dicke des durchlaufenden Metallbandes Betriebsstörungen, wie Werkzeugbruch vermieden werden.Another advantage of the new device is that that by continuously determining the thickness of the continuous Metal band malfunctions, such as tool breakage be avoided.

Ausführungsbeispiele der erfindungsgemäßen Vorrichtung sind in den Zeichnungen dargestellt und im folgenden näher beschrieben.
Es zeigen:

Fig. 1
eine Ausführung der Vorrichtung in schematischer Darstellung als Seitenansicht,
Fig. 2
eine Ansicht dazu in Vorschubrichtung,
Fig. 3
eine erste Ausführungform zu Fig. 1,
Fig. 4
eine zweite Ausführungsform zu Fig. 1 in detaillierter Darstellung,
Fig. 5
desgleichen mit gelüfteter Vorschubwalze,
Fig. 6
eine Darstellung nach Fig. 4 mit einer Blechdickenmessung.
Embodiments of the device according to the invention are shown in the drawings and described in more detail below.
Show it:
Fig. 1
an embodiment of the device in a schematic representation as a side view,
Fig. 2
a view of this in the feed direction,
Fig. 3
a first embodiment of Fig. 1,
Fig. 4
2 shows a second embodiment of FIG. 1 in a detailed representation,
Fig. 5
likewise with a lifted feed roller,
Fig. 6
a representation of FIG. 4 with a sheet thickness measurement.

Die Figuren 1 und 2 zeigen den Grundaufbau einer neuen Vorrichtung zum Lüften einer oberen Walze 7 eines hochdynamischen Walzenvorschubsystems 1 zum Zuführen eines Materialbandes 1a bei Pressen, Stanzen, o.ä. Maschinen, bei der die obere angetriebene Walze 2 auf einer Schwinge 5 höhenbeweglich gelagert ist und über Walzenlüftelemente 7 am freien Ende 5b eines Schwingenoberteils 5d bzw. 5d' die Positionierung durchgeführt wird.
Der Vorteil der neuen Vorrichtung zum Zwischenlüften der oberen Walze 2 eines hochdynamischen Walzenvorschubsystems 1 liegt darin, daß die die obere Vorschubwalze 2 tragende Schwinge 5 auf ihrer Oberseite unter Zwischenschaltung von Druckelementen 9 ein Stellglied 5d bzw. 5d' zugeordnet ist, an welchem als Walzenlüftelement mindestens eine über einen AC-Motor 8a positionierbare Spindel 7 angreift. Figures 1 and 2 show the basic structure of a new device for lifting an upper roller 7 of a highly dynamic roller feed system 1 for feeding a material strip 1a in presses, punches, or the like. Machines in which the upper driven roller 2 is mounted such that it can move in height on a rocker 5 and the positioning is carried out via roller release elements 7 at the free end 5b of an upper rocker part 5d or 5d '.
The advantage of the new device for intermediate ventilation of the upper roller 2 of a highly dynamic roller feed system 1 is that the rocker arm 5 carrying the upper feed roller 2 is assigned an actuator 5d or 5d 'on its upper side, with the interposition of pressure elements 9, on which at least one roller ventilation element engages a spindle 7 that can be positioned via an AC motor 8a.

In einer speziellen baulichen Ausgestaltungsform ist gemäß Fig. 1 und 2 dabei vorgesehen, daß das Steitgfied 5d plattenförmig ausgebildet ist, jochartig auf den Druckelementen 9 aufsitzt und über seitliche Führungssäulen 5c um ein einstellbares Höhenmaß b gegenüber der Schwinge 5 beweglich ist, wobei zudem noch die Positionierspindel 7 über eine Kugelgewindeführung 7a mit dem Stellglied 5d bzw. 5d' verbunden ist, die beiden symmetrisch dazu angeordneten Druckelemente 9 als luftbeaufschlagte Balgzylinder 9a ausgebildet sind und die Führungssäulen 5c an ihren oberhalb des Stellgliedes 5d bzw. 5d' herausragenden freien Enden mit Stellmuttern 5c' zum definierten Einstellen des die Materialdickentoleranz ausgleichenden Abstandes b versehen sind (Festanschlagfunktion = Materialdicke -0,2mm).
Gemäß der Fig. 2 und 3 kann die Bauform alternativ auch so gewählt sein, daß das Stellglied 5d' ebenfalls als Schwinge mit gleichem Drehpunkt 5a ausgebildet ist, an deren Schwingende 5b die Positionierspindeln 7, 7a angreifen, wobei vorzugsweise eine Anordnung von zwei Spindeln 7, 7c in gegenseitigem Horizontalabstand a zueinander auf einer gemeinsamen Welle 8 vorgesehen ist, an deren einem Ende zugleich der AC-Motor 8a sitzt (Fig. 3).
Die Zuordnung mindestens eines Begrenzungsanschlages 10 zur Oberseite des freien Schwingenendes 5b vervollständigt hierbei die bauliche Ausgestaltung ebenso wie eine schaltungsgemäße Verknüpfung des AC-Motors 8a für die Walzenlüftung mit der jeweiligen Maschinensteuerung .1 and 2, it is provided that the step 5d is plate-shaped, rests on the pressure elements 9 in a yoke-like manner and can be moved by an adjustable height dimension b with respect to the rocker 5 via lateral guide columns 5c, and in addition the Positioning spindle 7 is connected to the actuator 5d or 5d 'via a ball screw guide 7a, the two pressure elements 9 arranged symmetrically thereto are designed as air-actuated bellows cylinders 9a and the guide columns 5c with free nuts protruding above the actuator 5d or 5d' with adjusting nuts 5c '' are provided for the defined setting of the distance b compensating the material thickness tolerance (fixed stop function = material thickness -0.2mm).
2 and 3, the design can alternatively also be selected such that the actuator 5d 'is also designed as a rocker arm with the same pivot point 5a, at the swinging end 5b of which the positioning spindles 7, 7a act, preferably an arrangement of two spindles 7 , 7c at a mutual horizontal distance a from one another is provided on a common shaft 8, at one end of which the AC motor 8a is seated (FIG. 3).
The assignment of at least one limit stop 10 to the top of the free swing end 5b completes the structural design here, as does a circuit-like connection of the AC motor 8a for the roll ventilation with the respective machine control.

Eine weitere vorteilhafte Ausführungsform wird darin gesehen, daß der Balgzylinder 9 durch Federn o.a. Druckelemente ersetzbar ist und ebenso die Kugelgewindespindel 7, 7a durch Exzenter o.a. Verstellelemente ausgeführt werden kann.Another advantageous embodiment is seen in that the bellows cylinder 9 by springs or the like Print elements can be replaced is and also the ball screw 7, 7a Eccentric or similar Adjustment elements can be executed.

Durch die neue Vorrichtung kann somit ein nahezu verzögerungsfrei arbeitendes, bei üblichen Hubzahlen gradgenaues Ein- und Ausschalten der Walzenlüftung erhalten werden und dadurch höhere Hubzahlen der jeweiligen Presse bzw. Stanze.The new device can thus be almost instantaneous working, accurate to the usual stroke rates Switching the roller ventilation on and off can be obtained and thereby higher stroke rates of the respective press or punch.

Ein großer Vorteil der neuen Vorrichtung besteht weiterhin darin, daß die notwendige schnelle Zwischenlüftung nicht gegen die Kraft des Balgzylinders 9, sondern sogar mit Unterstützung dieser Kraft beim Anlauf des Motors 8a für ca. 0,2 mm durchgeführt wird.A great advantage of the new device continues to exist in that the necessary quick ventilation is not against the force of the bellows cylinder 9, but even with support this force when starting the motor 8a for approx. 0.2 mm is carried out.

Der Anlauf des Motors 8a beim Beenden der Zwischenlüftung erfolgt ebenfalls ohne Gegenkraft des Balgzylinders 9. Lediglich beim Beenden der Positionierung wird in den letzten 0,2 mm die Kraft P gegen die Fahrtrichtung wirksam. Sie unterstützt damit die Abbremsung des Motors. The motor 8a starts up when the intermediate ventilation is ended also takes place without counterforce from the bellows cylinder 9. Only when finishing the positioning is in the force 0.2 against the direction of travel last 0.2 mm. It thus supports the braking of the engine.

Bei der neuen Vorrichtung wird also erstmals die Walzenanpresskraft P des Balgzylinders 9 sowohl zum schnellen Öffnen der Walzen beim Zwischenlüften als auch beim schnellen Schließen am Ende der Zwischenlüftung unterstützend genutzt. Bisher wurde stets gegen diese Kraft P die Zwischenlüftung durchgeführt, was erhebliche Ansprechverzögerungen des gesamten Systems sowie hoher Verschleiß der baulichen Stellelemente zur Folge hatte.With the new device, the roller contact pressure is the first P of the bellows cylinder 9 both for quick opening the rollers for intermediate ventilation as well as for fast Closing used at the end of the intermediate ventilation. So far, the intermediate ventilation has always been against this force P. performed what significant response delays of the entire system as well as high wear of the structural Control elements resulted.

Eine für die Praxis besonders vorteilhafte, zu den Figuren 1 bis 3 alternative Ausführungsform zeigen Fig. 4 und 5.A particularly advantageous in practice, to the figures 1 4 and 5 show alternative embodiments.

Die Figuren 4 und 5 zeigen den Grundaufbau einer Vorrichtung zum Lüften der oberen Walze 2 eines hochdynamischen Walzenvorschubsystems 1 zum Zuführen eines Materialbandes 1a bei Pressen, Stanzen o.ä. Maschinen, bei der die obere angetriebene Walze 2 auf einer Schwinge 5 höhenbeweglich gelagert ist und über die Walzenlüftelemente 7 an der Anpreßplatte 5d die Positionierung durchgeführt wird.Figures 4 and 5 show the basic structure of a device for lifting the upper roller 2 of a highly dynamic roller feed system 1 for feeding a material strip 1a for presses, punches, etc. Machines where the upper driven Roller 2 is mounted on a rocker 5 so that it can move in height is and via the roller lifting elements 7 on the pressure plate 5d the positioning is carried out.

Der Vorteil bei dieser Variante einer Ausführungsform liegt bei einem solchen Vorschubsystem darin, daß die die obere Vorschubwalze 2 tragende Schwinge 5 auf ihrer Oberseite unter Zwischenschaltung von Druckelementen 9 Stellglieder 7 bis 10 in Form eines über einen AC-Motor 8a positionierbaren Exzenters zugeordnet sind. Die genaue Positionierung erfolgt dadurch, daß entsprechend der programmierten Materialdicke in der CNC-Steuerung der AC-Motor 8a den Exzenter 7 um den entsprechenden Winkel dreht und an einem Kontaktpunkt 10c diese Position auf ein Anpreßlager 10 gegen die Kraft des Balgzylinders 9 auf eine Anpreßplatte 5d überträgt.The advantage of this variant of an embodiment is included such a feed system in that the upper feed roller 2 carrying rocker 5 on its top underneath Interposition of pressure elements 9 actuators 7 to 10 in the form of an eccentric that can be positioned via an AC motor 8a assigned. The exact positioning is done by that according to the programmed material thickness in the CNC control of the AC motor 8a the eccentric 7 corresponding angle rotates and at a contact point 10c this position on a pressure bearing 10 against the force of Bellows cylinder 9 transfers to a pressure plate 5d.

Durch den Druck im Balgzylinder 9 (z.B. 3 Bar - mit linearer Kennlinie im Arbeitsbereich -) wird die angefahrene Position nun auch über die Schwinge 5 von der Oberwalze 2 eingenommen. Der Abstand zwischen Ober- und Unterwalze 2 und 3 entspricht nun der programmierten Materialdicke. Bei einer etwaigen Untertoleranz des Materialstreifens 1a würde der Streifen lose zwischen den beiden Walzen 2 und 3 liegen; üblicherweise programmiert man daher den Wert von Materialdicke 1a minus Eintauchtiefe der Anpreßplatte 5d in den Balgzylinder 9, so daß beispielsweise 0,5mm Eintauchtiefe bei Pos. 5e bedeuten, daß der Abstand zwischen Ober- und Unterwalze sich auf Materialdicke von 1a -0,5mm einstellt. Beim Einfahren des Materials 1a zwischen die Vorschubwalzen 2 und 3 wird sich die Schwinge 5 gegen den Druck des Balgzylinders 9 um 0,5mm nach oben bewegen; auf dem Materialband liegt somit der volle Anpreßdruck des Balgzylinders 9 an.
Die zuvor beschriebene Funktionsweise wird in spezieller baulicher Ausgestaltung vor allem dadurch erreicht, daß der als Exzenter 7, 10 ausgebildete Verstellantrieb aus einem auf der Oberseite der Anpreßplatte 5d der Schwinge 5 sitzenden Anpreßlager 10 mit Lagerbock 10' und der über eine Halterung 7" am Vorschubgehäuse befestigten, den Exzenter 7 beinhaltenden Antriebsscheibe 7' besteht, wobei das Anpreßlager 10 über eine in einem Anpreßhebel 7a gehaltene Laufrolle 10a formschlüssig in die Laufbahn des Exzenters 7 eingreift. Wichtig hierbei ist die Ausbildung der Exzenterführungsbahn 7 als zur Antriebsscheibe 7' erhaben oder in letztere eingelassen gestaltete Innen- oder Außenform.Due to the pressure in the bellows cylinder 9 (eg 3 bar - with a linear characteristic in the work area -), the position reached is now also assumed by the upper roller 2 via the rocker 5. The distance between the upper and lower rollers 2 and 3 now corresponds to the programmed material thickness. In the event of a possible under-tolerance of the material strip 1a, the strip would lie loosely between the two rollers 2 and 3; Usually you program the value of material thickness 1a minus the immersion depth of the pressure plate 5d in the bellows cylinder 9, so that, for example, 0.5mm immersion depth at item 5e means that the distance between the upper and lower rollers adjusts to the material thickness of 1a -0.5mm . When the material 1a is moved in between the feed rollers 2 and 3, the rocker 5 will move upwards by 0.5 mm against the pressure of the bellows cylinder 9; the full contact pressure of the bellows cylinder 9 is thus present on the material band.
The above-described mode of operation is achieved in a special structural embodiment above all in that the adjusting drive designed as an eccentric 7, 10 consists of a pressure bearing 10 with a bearing block 10 'seated on the top of the pressure plate 5d of the rocker 5 and with a bracket 7 "on the feed housing attached drive disc 7 'containing the eccentric 7, the pressure bearing 10 positively engaging in the raceway of the eccentric 7 via a roller 10a held in a pressure lever 7a. It is important here that the eccentric guide track 7 is raised to the drive disc 7' or in the latter recessed interior or exterior shape.

Gemäß der Darstellung in Fig. 6 kann mit der neuen Vorrichtung gleichzeitig auch noch eine kontinuierliche Ermittlung der Dicke des durchlaufenden Metallbandes 1a erfolgen; dies ist bei der Metallbearbeitung auf Pressen und Stanzen ein sehr wichtiges Kriterium zur Vermeidung von Betriebsstörungen, wie beispielsweise Werkzeugbruch.
Gelöst wird dies durch einen Sensor 11 am freien Endstück 5b der Schwinge 5 und eine dem Sensor 11 mit Abstand gegenüberliegend vorn an der Schwinge 5 fest angeordnete Meßfahne 12, als Überwachungselement für die Erhaltung der werkseitig garantierten oberen Toleranzweite des zugeführten Blechmaterials, in erfindungsgemäßer, schaltungstechnischer Verknüpfung des Sensors 11 mit der Maschinensteuerung zum Zwecke der Maschinen- bzw. Vorschubstillsetzung bei Überschreitung der zulässigen Banddicke.According to the representation in FIG. 6, the new device can also simultaneously determine the thickness of the metal strip 1a passing through; this is a very important criterion for avoiding malfunctions, such as tool breakage, when working with metal on presses and punches.
This is solved by a sensor 11 on the free end piece 5b of the rocker 5 and a measuring flag 12 fixedly arranged at a distance opposite the sensor 11 at the front on the rocker 5, as a monitoring element for maintaining the factory-guaranteed upper tolerance range of the sheet metal material, in the circuitry of the invention Linking the sensor 11 to the machine control for the purpose of stopping the machine or feed when the permissible strip thickness is exceeded.

Die dargestellte Meßeinrichtung bedarf hierbei keiner mechanischen, d.h. manuellen Einstellung. Sie wird in der Maschinensteuerung programmiert mit den Grunddaten des Vorschubs, also der Vorschublänge, Geschwindigkeit, Beschleunigung, Banddicke, Zwischenlüftung und zudem der Banddickentoleranz von z.B. +/- 0,05mm. Sämtliche Daten werden unter der Teilenummer des jeweiligen Werkzeugs abgespeichert.The measuring device shown here does not require any mechanical i.e. manual setting. It is in the machine control programmed with the basic data of the feed, i.e. the feed length, speed, acceleration, Strip thickness, intermediate ventilation and also the strip thickness tolerance from e.g. +/- 0.05mm. All data is stored under the Part number of the respective tool saved.

Die Mechanik der Meßapparatur ist der Vorschub mit den Elementen der Zwischenlüftung selbst. Es wird nur zusätzlich ein Abstandssensor in z.B. optischer oder induktiver bzw. kapazitiver analoger Art benötigt. Es ist also keine zusätzliche Mechanik mit im allgemeinen relativ hohem Platzbedarf erforderlich.The mechanics of the measuring apparatus is the feed with the elements the intermediate ventilation itself. It only becomes an additional one Distance sensor in e.g. optical or inductive or capacitive of an analog type. So it is not an additional mechanism with generally relatively large space requirements.

Die Grundlage des Meßverfahrens zur Ermittlung der Dicke des durchlaufenden Matallbandes 1a mit der neuen Vorrichtung besteht darin, daß durch eventuell unterschiedliche Materialdicke des Bandes die bewegliche Schwinge 5 mit der Oberwalze (Unterwalze des Vorschubes ist festgelagert) entsprechend bei Plustoleranz angehoben und bei Minustoleranz abgesetzt wird. Da das Schwingoberteil 5b und 5d auf den programmierten Wert positioniert ist, entsteht eine relative Abstandsänderung zwischen Schwinge 5 und Schwingenoberteil 5b und 5d.The basis of the measurement method for determining the thickness of the continuous metal ribbon 1a with the new device is that by possibly different material thickness of the belt, the movable rocker 5 with the top roller (Lower roller of the feed is fixed) accordingly raised with plus tolerance and with minus tolerance is discontinued. Since the swing top 5b and 5d on the programmed value, there is a relative change in distance between swing arm 5 and swing arm upper part 5b and 5d.

Ein Programmierbeispiel kann dabei wie folgt aussehen: a) Banddicke (Festanschlag) 3,8 mm b) Zwischenlüftung 0,5 mm c) Banddickentoleranz +/- 0,05 mm A programming example can look like this: a) Strip thickness (fixed stop) 3.8 mm b) Intermediate ventilation 0.5 mm c) Strip thickness tolerance +/- 0.05 mm

Nach Bandwechsel wird das Meßfenster für die Banddicke mit Endmaß oder kontrolliertem Bandanfang wie folgt ermittelt:

  • 1) Festlegung des oberen Toleranzwertes:
    Steuerung positioniert Schwingenoberteil 5b auf 3,85 mm und mißt den Wert des Abstandssensors = d1
  • 2) Festlegung des unteren Toleranzwertes:
    Steuerung positioniert Schwingenoberteil 5b auf 3,75 mm und mißt den Wert des Abstandssensors = d2.
  • 3) Steuerung positioniert das Schwingenoberteil 5b auf den programmierten Wert für den Dauerlauf auf 3,8 mm und Freigabe zur Produktion.
  • 4) Dauerlauf mit kontinuierlicher Banddickenkontrolle:
    Liegt während des Vorschiebens (Messung innerhalb von Vorschubwinkel) der aktuelle Meßwert über dem Grenzwert d1 oder unter d2, so wird die Anlage gestoppt und der Fehler angezeigt. Bei gleicher Meßeinrichtung kann die abweichende Banddicke in mm angezeigt werden.
    • After changing the tape, the measuring window for the tape thickness with final dimension or controlled tape start is determined as follows:
  • 1) Determination of the upper tolerance value:
    The controller positions the upper part of the swing arm 5b at 3.85 mm and measures the value of the distance sensor = d1
  • 2) Determination of the lower tolerance value:
    The controller positions the upper part of the swing arm 5b at 3.75 mm and measures the value of the distance sensor = d2.
  • 3) The controller positions the upper part of the swing arm 5b at the programmed value for the continuous run at 3.8 mm and release for production.
  • 4) Endurance run with continuous strip thickness control:
    If the current measured value is above the limit value d1 or below d2 during the advance (measurement within the feed angle), the system is stopped and the error is displayed. With the same measuring device, the different strip thickness can be displayed in mm.

    • Die Grenzwerte d1 und d2 können dabei zur entsprechenden Teilenummer abgespeichert werden. Bei Produktionsbeginn mit einem neuen Werkzeug kann nach Aufruf der betreffenden Teilenummern sofort der kontrollierte Stanzbetrieb beginnen.The limit values d1 and d2 can correspond to the corresponding one Part number can be saved. At the start of production with a new tool can be called up after the relevant part numbers Start the controlled punching operation immediately.

    Claims (14)

    1. Device for interim release of the upper roller (2) of a highly dynamic roller feed system (1) for feeding a material strip (1a) in presses, punches or similar machines, in which an upper roller (2) together with its drive is mounted by way of a gearwheel set on a rocker (5) to be movable in height and roller releasing elements (7) engage at the rocker (5), wherein the rocker (5) carrying the upper feed roller (2) is associated on its upper side with a setting element (5d, 5d') with interposition of pressure elements (9), characterised in that at least one mechanical lifting element positionable by way of an AC motor (8a) engages at the setting element (5d, 5d') as a roller releasing element, wherein the positioning thereof is effected by a linking in terms of circuit of the AC motor (8) with the respective machine control.
    2. Device according to claim 1, characterised in that a positioning spindle (7) is provided as lifting element and the setting element (5d, 5d') constructed to be plate-shaped is seated on the pressure elements (9) in the manner of a yoke and is movable through an adjustable height dimension (b) relative to the rocker (5) by way of lateral spacer elements (5c) constructed as guide columns.
    3. Device according to claim 1 and 2, characterised in that the positioning spindle (7) is connected with the setting element (5d, 5d') by way of a ball-and-thread guide, wherein the two pressure elements (9) arranged symmetrically thereto are constructed as pneumatically actuated bellows cylinders (9a) and the guide columns (5c) have, at the free ends thereof projecting above the setting element (5d, 5d'), a setting nut (5c') for defined setting of the spacing (b) compensating for the material thickness tolerance.
    4. Device according to one of claims 1 to 3, characterised in that the setting element (5d') is constructed as a rocker with an equidistant fulcrum (5a) and the positioning spindle (7, 7a) engages at the rocker ends (5b) of the rocker.
    5. Device according to one of claims 1 to 4, characterised in that an arrangement of two spindles (7, 7c) in mutual horizontal spacing (a) relative to one another is provided on a common shaft (8), at one end of which an AC motor (8a) is arranged.
    6. Device according to claim 5, characterised in that at least one limiting abutment (10) is provided at an upper side of the free rocker end (5b).
    7. Device according to one of claims 1 to 6, characterised in that the pressure elements (9) are constructed as springs.
    8. Device according to one of claims 1 to 7, characterised in that the adjusting elements (7, 7a) are constructed as eccentrics.
    9. Device according to one of claims 1 to 8, characterised in that the mechanical lifting element is constructed as an eccentric drive (7; 7a, 10; 10, 10b) engaging at the press plate (5d) of the rocker (5) and positionable by way of an AC motor (8a).
    10. Device according to claim 9, characterised in that the adjusting drive constructed as an eccentric (7, 10) is provided from a pressure bearing (10), which is seated on the upper side of the press plate (5d) of the rocker (5), with a bearing block (10'), and a drive disc (7'), which is fastened at the feeder housing by way of a mount (7") and includes the eccentric (7).
    11. Device according to claim 9 and 10, characterised in that the pressure bearing (10) engages in the path of the eccentric (7) in shape-locking manner by way of a roller (10a) mounted in a press lever (7a).
    12. Device according to one of claims 1 to 11, characterised in that the construction of the eccentric guide track (7) is provided as an internal or external guide formed to be elevated relative to the drive disc (7') or let into the latter.
    13. Device according to one of claims 1 to 12, characterised in that for detecting the fed material bale (1a) a sensor (11) is provided at the free end piece (5b) of the rocker (5) and a measuring vane (12) is fixedly arranged at the front at the rocker (5) to be opposite the sensor (11) at a spacing.
    14. Device according to claim 13, characterised in that a machine or feed standstill in the case of exceeding the permissible strip thickness is provided by a linking of the sensor (11) with the machine control in terms of circuit.
    EP96103019A 1995-03-03 1996-02-29 Apparatus for lifting one of the rollers of a highly dynamic transport system with integrated measuring of plate thickness Expired - Lifetime EP0730920B1 (en)

    Applications Claiming Priority (6)

    Application Number Priority Date Filing Date Title
    DE19507396 1995-03-03
    DE19507396A DE19507396C2 (en) 1994-08-09 1995-03-03 Device for intermediate ventilation of one of the rollers on dynamic feed systems
    DE29509112U 1995-06-02
    DE29509112 1995-06-02
    DE1995133697 DE19533697C2 (en) 1995-03-03 1995-09-12 Device for the continuous determination of the thickness of material strips in roll feed systems
    DE19533697 1995-09-12

    Publications (2)

    Publication Number Publication Date
    EP0730920A1 EP0730920A1 (en) 1996-09-11
    EP0730920B1 true EP0730920B1 (en) 2001-11-21

    Family

    ID=27214893

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP96103019A Expired - Lifetime EP0730920B1 (en) 1995-03-03 1996-02-29 Apparatus for lifting one of the rollers of a highly dynamic transport system with integrated measuring of plate thickness

    Country Status (2)

    Country Link
    EP (1) EP0730920B1 (en)
    AT (1) ATE209074T1 (en)

    Cited By (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    CN101172289B (en) * 2006-10-30 2011-07-13 会田工程技术有限公司 Releasing mechanism and leveling apparatus
    CN107055168A (en) * 2017-05-04 2017-08-18 苏州晨钟自动化科技有限公司 A kind of cloth pressing roll mechanism
    CN111589986A (en) * 2020-06-03 2020-08-28 南京龙浩新材料科技有限公司 Automatic multi-arc-surface steel bar bending machine

    Families Citing this family (5)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    EP1086916B1 (en) * 1999-08-25 2003-12-10 Heidelberger Druckmaschinen Aktiengesellschaft Bearing unit for draw rollers of material webs
    EP1716939B1 (en) * 2005-12-08 2007-08-29 Elite Machine and Design Ltd. Simultaneous drive even pressure distribution metal sheet-feeder for punch
    GB2488779B (en) * 2011-03-07 2013-03-06 Siemens Vai Metals Tech Ltd Rotary side shear device and method
    CN117228395B (en) * 2023-11-14 2024-01-19 常州金纬片板膜科技有限公司 Sheet material storage rack
    CN117367239B (en) * 2023-12-08 2024-05-24 山东龙拓新材料有限公司 Plastic product thickness detection device

    Family Cites Families (3)

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    Publication number Priority date Publication date Assignee Title
    CH543932A (en) * 1971-10-01 1973-11-15 Bruderer Ag Device for gradually advancing a workpiece
    DE2507701A1 (en) * 1975-02-22 1976-09-02 Schuler Gmbh L Intermittent feeding of strip material - has stroke adjusted by programme-controlled auxiliary drive
    JPH01170536A (en) * 1987-12-25 1989-07-05 Sankyo Seisakusho:Kk Roll feeding device

    Cited By (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    CN101172289B (en) * 2006-10-30 2011-07-13 会田工程技术有限公司 Releasing mechanism and leveling apparatus
    CN107055168A (en) * 2017-05-04 2017-08-18 苏州晨钟自动化科技有限公司 A kind of cloth pressing roll mechanism
    CN111589986A (en) * 2020-06-03 2020-08-28 南京龙浩新材料科技有限公司 Automatic multi-arc-surface steel bar bending machine

    Also Published As

    Publication number Publication date
    EP0730920A1 (en) 1996-09-11
    ATE209074T1 (en) 2001-12-15

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