EP0467890B1 - Process and device for screwing fragile parts - Google Patents
Process and device for screwing fragile parts Download PDFInfo
- Publication number
- EP0467890B1 EP0467890B1 EP19900903594 EP90903594A EP0467890B1 EP 0467890 B1 EP0467890 B1 EP 0467890B1 EP 19900903594 EP19900903594 EP 19900903594 EP 90903594 A EP90903594 A EP 90903594A EP 0467890 B1 EP0467890 B1 EP 0467890B1
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- Prior art keywords
- screwing
- parts
- screw
- screw spindle
- screws
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
- B22C9/103—Multipart cores
Definitions
- the invention relates to a device for connecting parts with low strength, in particular a device for screwing masks, molds, foundry cores, preferably sole and water jacket cores, and a corresponding method.
- the cores are formed by hand or with the help of core molding machines in special multi-part core boxes or core bushings.
- the core is generally produced by blowing, plugging and shooting.
- the individual cores are combined or brought together in separate operations by gluing or nailing, which makes the manufacturing process very cumbersome, labor-intensive and time-consuming (DE-PS 35 26 265 and DE-GM 75 15 919).
- the starting point for the device according to the invention or for the method according to the invention is the prior art known from DE-OS 25 22 161. From this document, a method and an apparatus for connecting multi-part, heat-curable foundry cores are known.
- the foundry cores are connected to one another by means of metal pins, these being knocked into passages and forming an interference fit with the cores.
- the present invention is therefore initially based on the object of specifying a device for connecting low-strength parts, in particular for connecting masks, molds, foundry cores, preferably sole and water jacket cores, with which the parts to be combined - without any intermediate handling - can be brought directly from the manufacturing site to the screwing station.
- a device for connecting low-strength parts in particular for connecting masks, molds, foundry cores, preferably sole and water jacket cores, with which the parts to be combined - without any intermediate handling - can be brought directly from the manufacturing site to the screwing station.
- the risk of damage to the parts to be connected or even breakage of the material should be considerably reduced.
- a corresponding procedure is also to be specified.
- the above object is achieved in that a gripping device for grasping the parts to be connected and at least one screwdriver and a drive device for the screwdriver are provided.
- the screw spindle is spring-mounted at least in the screw feed direction.
- a spring housing is formed for the resilient mounting of the screw spindle between the drive device of the screw spindle and the screw spindle. At least one spring element acting between the drive device and the screw spindle is provided in this spring housing.
- a driving pin is further advantageously provided, which sits on the spring element and thereby represents a link or an operative connection between the spring element and the screw.
- the torque of the drive device or of the screwdriver is determined by a preferably adjustable - automatic - shut-off clutch provided in the drive device.
- clamping jaws are provided for holding the screws.
- the holding pressure is generated by means of pneumatic or hydraulic cylinder-piston arrangements.
- the jaws open to push the screws through.
- the particles of the parts to be screwed which get into the area of the device during screwing are blown out or sucked away by means of a blow-out device.
- the screw spindle is also resiliently mounted transversely to the screw feed direction. This creates a slight play of the screw spindle orthogonal to the screw feed direction, as a result of which the screw spindle can tilt slightly.
- a shooting device for shooting in the screws to be screwed in by the screwdriver is provided, in particular from the point of view of a fully automatic connection of the parts in question.
- the insertion device has a reflection light barrier to monitor and regulate these processes.
- the position of the screwdrivers can be changed by means of spindles, as a result of which the screwdrivers are set to different screwing points.
- the inventive method for connecting parts with low strength in particular for connecting masks, Molds, foundry cores, preferably of sole and water jacket cores, are first grasped, the parts to be connected by means of a gripping device and braced together. The parts are then positioned in the work area of a screwdriver. In the case of foundry cores to be screwed, the parts or cores are regularly positioned above one or more screwdrivers. Then one or more screws are shot into the screwdriver. The parts are screwed together, in a particularly advantageous manner to prevent damage to the parts or to avoid brittle fracture, the screw feed, ie the screwing speed, is compensated for by a resilient mounting of the screw spindle without impairing the contact pressure.
- the method step of screwing in the screw is advantageously designed such that the torque of the screwdriver is determined or regulated by a preferably adjustable automatic shut-off clutch.
- FIGS 1 to 3, 5 and 6 show an embodiment of an inventive device of an inventive device for screwing parts 1, 2 with low strength.
- This is a screwing device for screwing foundry cores, namely sole and water jacket cores 1, 2.
- the device according to the invention includes a gripping device 3 for gripping the foundry cores 1, 2 to be screwed, and a screwdriver 6 having a screw spindle 10 and a drive device 11 for the screw spindle 10.
- the screw spindle 10 is spring-mounted at least in the screw feed direction. This is evidently achieved in that for the resilient mounting of the screw spindle 10 between the drive device 11 of the screw spindle 10 and the screw spindle 10, a spring housing 12 with one between the drive device 11 and the screw spindle 10 acting spring element 13 is arranged. A driver pin 14 is seated on the spring element 13.
- the torque of the drive device 11 or of the screwdriver 6 is determined by an adjustable automatic shut-off clutch provided in the drive device 11.
- clamping jaws 15 are provided for holding the screws.
- the required holding pressure is generated by means of pneumatic or hydraulic cylinder-piston arrangements 16.
- the clamping jaws 15 only open for pushing through the screws 5.
- Particles of the parts 1, 2 to be screwed possibly reaching the area of the device during screwing, are blown out by means of a blow-out device 17 or sucked off by means of a suction device.
- the screw 10 can also be resiliently mounted transversely to the screw feed direction, so that screws 5 can also be easily screwed in, which are not aligned with the original axis of the screw 10.
- the shooting device 4 can have a separating device (not shown in the figures) for separating the screws 5.
- the mode of operation of the device according to the invention is described below.
- the parts 1, 2 or the sole core 1 and the water jacket core 2 are plugged together or joined and gripped by means of the gripping device 3 and braced together.
- the clamped parts 1, 2 are brought over the screwdriver 6.
- a screw 5 or screws 5 are then pneumatically injected into the clamping jaws 15 by means of the shooting device 4 through the transport hoses 8.
- the parts 1, 2 are then screwed together.
- the respective screw position of the spindle 10 can be specified via an adjusting spindle 7.
- the screw spindles 10 with drive motor 11, spring housing 12, spring 13 and driving pin 14 are used for the gentle screwing of the parts 1, 2, the screw feed or screwing speed being balanced without the contact pressure of the screw spindle 10 on the screw 5 being impaired.
- the screws are held by the clamping jaws 15, which can be actuated via the pneumatic cylinder 16.
- reference numbers 18, 19 refer to ball bearings and a bearing bush.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Devices For Molds (AREA)
Abstract
Description
Die Erfindung betrifft eine Vorrichtung zum Verbinden von Teilen mit geringer Festigkeit,insbesondere eine Vorrichtung zum Verschrauben von Masken, Formen, Gießereikernen, vorzugsweise von Sohlen- und Wassermantelkernen sowie ein entsprechendes Verfahren.The invention relates to a device for connecting parts with low strength, in particular a device for screwing masks, molds, foundry cores, preferably sole and water jacket cores, and a corresponding method.
Das Verbinden von Teilen mit geringer Festigkeit ist stets problematisch, da bereits eine umständliche Handhabung bzw. ein aufwendiges Fördern solcher Teile zu einer Nagel- oder Schraubstation zum Bruch dieser Teile führen kann. Zur Vermeidung eines Bruches der zu verbindenden Teile muß desweiteren sowohl der Schraubvorschub als auch das Anzugsmoment sehr gering ausgelegt sein.The connection of parts with low strength is always problematic, since a complicated handling or an expensive conveying of such parts to a nailing or screwing station can lead to the breakage of these parts. To avoid breakage of the parts to be connected, both the screw feed and the tightening torque must also be very low.
Bei Kernen aus der Gießereitechnik handelt es sich um derarte Teile mit geringer Festigkeit, so daß die in der Praxis auftretende Problematik anhänd solcher Kerne nachfolgend erläutert wird.Cores from foundry technology are such parts with low strength, so that the problems encountered in practice are explained below using such cores.
In der Gießereitechnik erfolgt das Formen der Kerne von Hand oder mit Hilfe von Kernformmaschinen in besonderen mehrteiligen Kernkästen oder Kernbüchsen. Die Kernherstellung erfolgt im allgemeinen durch Kernblasen, Kernstopfen und Kernschießen. Die einzelnen, Kerne werden in getrennten Arbeitsgängen durch Kleben oder Nageln vereinigt bzw. zusammengeführt, wodurch das Herstellungsverfahren sehr umständlich, arbeitsintensiv und zeitraubend ist (DE-PS 35 26 265 und DE-GM 75 15 919).In foundry technology, the cores are formed by hand or with the help of core molding machines in special multi-part core boxes or core bushings. The core is generally produced by blowing, plugging and shooting. The individual cores are combined or brought together in separate operations by gluing or nailing, which makes the manufacturing process very cumbersome, labor-intensive and time-consuming (DE-PS 35 26 265 and DE-GM 75 15 919).
Ausgangspunkt für die erfindungsgemäße Vorrichtung bzw. für das erfindungsgemäße Verfahren ist der aus der DE-OS 25 22 161 bekannte Stand der Technik. Aus dieser Entgegenhaltung ist ein Verfahren bzw. eine Vorrichtung zum Verbinden mehrteiliger, wärmeaushärtbarer Gießereikerne bekannt. Die Gießereikerne werden mittels Metallstifte miteinander verbunden, wobei diese in Durchtritte eingeschlagen werden und mit den Kernen einen Preßsitz bilden.The starting point for the device according to the invention or for the method according to the invention is the prior art known from DE-OS 25 22 161. From this document, a method and an apparatus for connecting multi-part, heat-curable foundry cores are known. The foundry cores are connected to one another by means of metal pins, these being knocked into passages and forming an interference fit with the cores.
Des weiteren ist aus der DE-OS 34 24 911 für sich ein Verfahren zum Eindrehen einer Schraube in dünnwandige Bleche sowie eine Vorrichtung zur Durchführung des Verfahrens bekannt. Hierbei handelt es sich um ein Verfahren zum Eindrehen einer Schraube mit einem selbstfurchenden Gewinde in dünnwandige Bleche, wobei die Ausreißfestigkeit der Schraube dadurch erhöht wird, daß die Schräube kraterförmig das Blech einzieht, also entsprechend deformiert.Furthermore, from DE-OS 34 24 911 a method for screwing a screw into thin-walled sheets and a device for performing the method is known. This is a method for screwing a screw with a self-tapping thread into thin-walled sheets, the screw's pull-out strength being increased by the fact that the screws pull the sheet in a crater-like manner, ie deform it accordingly.
Beim Verbinden von Teilen mit geringer Festigkeit bzw. beim Verbinden einzelner Kerne durch Nageln oder Schrauben hat sich in der Praxis desweiteren herausgestellt, daß das Material der zu verbindenden Teile aufgrund auftretender Scherkräfte leicht bricht.When connecting parts with low strength or when connecting individual cores by nailing or screwing, it has also been found in practice that the material of the parts to be connected breaks easily due to the shear forces that occur.
Der vorliegenden Erfindung liegt daher zunächst die Aufgabe zugrunde, eine Vorrichtung zum Verbinden von Teilen mit geringer Festigkeit, insbesondere zum Verbinden von Masken, Formen, Gießereikernen, vorzugsweise von Sohlen- und Wassermantelkernen, anzugeben, mit der die zu vereinigenden Teile - ohne jegliche Zwischenhandhabung - unmittelbar von der Herstellungsstelle zur Schraubstation bringbar ist. Dabei soll die Gefahr einer Beschädigung der zu verbindenden Teile oder gar eines Materialsbruchs erheblich verringert sein. Desweiteren soll ein entsprechendes Verfahren angegeben werden.The present invention is therefore initially based on the object of specifying a device for connecting low-strength parts, in particular for connecting masks, molds, foundry cores, preferably sole and water jacket cores, with which the parts to be combined - without any intermediate handling - can be brought directly from the manufacturing site to the screwing station. The risk of damage to the parts to be connected or even breakage of the material should be considerably reduced. A corresponding procedure is also to be specified.
Erfindungsgemäß wird die voranstehende Aufgabe dadurch gelöst, daß eine Greifvorrichtung zum Erfassen der zu verbindenden Teile und mindestens ein eine Schraubspindel und eine Antriebs-einrichtung für die Schraubspindel aufweisender Schrauber vorgesehen ist. In besonders vorteilhafter Weise ist die Schraubspindel zumindest in Schraubvorschubrichtung federnd gelagert ist.According to the invention, the above object is achieved in that a gripping device for grasping the parts to be connected and at least one screwdriver and a drive device for the screwdriver are provided. In a particularly advantageous manner, the screw spindle is spring-mounted at least in the screw feed direction.
Es ist also zunächst erkannt worden, daß zum ordnungsgemäßen Verbinden der in Rede stehenden Teile eine Greifvorrichtung zum Erfassen der zu verbindenden Teile und mindestens ein eine Schraubspindel und eine Antriebseinrichtung für die Schraubspindel aufweisender Schrauber erforderlich ist. Desweiteren ist erkannt worden, daß die beim Verschrauben der geringe Festigkeit aufweisenden Teile häufig auftretenden Materialbeschädigungen bzw. Materialbrüche in erster Linie auf einen zu "groben" Schraubvorschub zurückzuführen sind. Dieser "grobe" Schraubvorschub wird erfindungsgemäß durch eine federnde Lagerung der Schraubspindel zumindest in Schraubvorschubrichtung dann verringert, wenn der Schraube materialseitig ein Widerstand entgegenwirkt.It was thus initially recognized that a gripping device for grasping the parts to be connected and at least one screwdriver and a drive device for the screwdriver are required for the correct connection of the parts in question. Furthermore, it has been recognized that the material damage or material breakage that frequently occurs when the low-strength parts are screwed together is primarily due to an "coarse" screw feed. This "coarse" screw feed is reduced according to the invention by a resilient mounting of the screw spindle at least in the screw feed direction when the screw counteracts resistance on the material side.
In besonders vorteilhafter Weise ist zur federnden Lagerung der Schraubspindel zwischen der Antriebseinrichtung der Schraubspindel und der Schraubspindel ein Federgehäuse ausgebildet. In diesem Federgehäuse ist mindestens ein zwischen der Antriebseinrichtung und der Schraubspindel wirkendes Federelement vorgesehen.In a particularly advantageous manner, a spring housing is formed for the resilient mounting of the screw spindle between the drive device of the screw spindle and the screw spindle. At least one spring element acting between the drive device and the screw spindle is provided in this spring housing.
Damit die Vorschubdifferenzen zwischen dem Vorschub der Schraubspindel und der durch die Drehzahl sowie die Steigung des Gewindes der einzudrehenden Schraube bestimmten Einschraub-geschwindigkeit ausgeglichen werden, ohne dabei den Anpreßdruck der Schraubspindel auf die Schraube und somit auf das Material der zu verschraubenden Teile zu beeinträchtigen, ist in weiter vorteilhafter Weise ein Mitnehmerbolzen vorgesehen, der auf dem Federelement aufsitzt und dabei ein Bindeglied bzw. eine Wirkverbindung zwischen dem Federelement und der Schraube darstellt.So that the feed differences between the feed of the screw spindle and the screw-in speed determined by the speed and the pitch of the thread of the screw to be screwed in are compensated without the contact pressure To affect the screw on the screw and thus on the material of the parts to be screwed, a driving pin is further advantageously provided, which sits on the spring element and thereby represents a link or an operative connection between the spring element and the screw.
Desweiteren ist erkannt worden, daß neben einem "groben" Schraubvorschub auch ein zu hohes Anzugsmoments zum Materialbruch bei Teilen geringer Festigkeit führen kann. Das Anzugsmoment mußte zur Vermeidung von Materialbruch derart verringert werden, daß keine Toleranzbereiche mehr möglich sind. Die Schrauben könnten zwar bei einem automatischen Einschießen mittels Preßluft mit Klemmbacken festgehalten werden, wobei die Klemmbacken den Hältedruck beispielsweise über Blattfedern auf:bringen köriten. Jedoch würde dabei das Anzugsmoment beim Durchschieben des Schraubenkopfes durch die Klemmbacken und gegen den Zuhaltedruck der Blattfedern so stark beeinflußt, daß das an der Schraube erforderliche - gleichmäßige - Anzugsmoment nicht mehr einzuhalten wäre.Furthermore, it has been recognized that in addition to a "coarse" screw feed, too high a tightening torque can lead to material breakage in the case of parts of low strength. To avoid material breakage, the tightening torque had to be reduced in such a way that tolerance ranges were no longer possible. The screws could be held in place during automatic shooting in by compressed air with clamping jaws, the clamping jaws applying the holding pressure, for example, via leaf springs. However, the tightening torque when pushing the screw head through the clamping jaws and against the locking pressure of the leaf springs would be influenced so strongly that the - even - tightening torque required on the screw could no longer be maintained.
Hinsichtlich einer Begrenzung des Anzugsmoments ist es daher von besonderem Vorteil, wenn das Drehmoment der Antriebseinrichtung bzw. des Schraubers durch eine in der Antriebseinrichtung vorgesehene, vorzugsweise regulierbare - automatische - Abschaltkupplung bestimmt wird.With regard to a limitation of the tightening torque, it is therefore particularly advantageous if the torque of the drive device or of the screwdriver is determined by a preferably adjustable - automatic - shut-off clutch provided in the drive device.
Beim automatischen Einschießen der Schrauben sind zum Halten der Schrauben Klemmbacken vorgesehen. Der Haltedruck wird mittels pneumatischer oder hydraulischer Zylinder-Kolben-Anordnungen erzeugt. Die Klemmbacken öffnen zum Durchschieben der Schrauben.When the screws are automatically shot in, clamping jaws are provided for holding the screws. The holding pressure is generated by means of pneumatic or hydraulic cylinder-piston arrangements. The jaws open to push the screws through.
Nun kommt es gerade bei zu verbindenden Teilen mit geringer Festigkeit, insbesondere bei spröden Teilen, vor, daß beim Einschrauben der Schraube Partikel gelöst weiden, die dann in den Bereich der Klemmbacken geraten und dort die Reibwerte erhöhen oder gar zu einer.Beschädigung der Klemmbacken führen.-Nach einer weiteren Ausgestaltung der erfindungsgemäßen Lehre werden daher die beim Schrauben in den Bereich der Vorrichtung gelangenden Partikel der zu verschraubenden Teile mittels einer Ausblasvorrichtung ausgeblasen oder weggesaugt.Now, especially with parts to be connected with low strength, especially brittle parts, particles are loosened when the screw is screwed in, which then gets into the area of the clamping jaws and increases the friction coefficients there or even leads to damage to the clamping jaws According to a further embodiment of the teaching according to the invention, the particles of the parts to be screwed which get into the area of the device during screwing are blown out or sucked away by means of a blow-out device.
Damit mit der erfindungsgemäßen Vorrichtung auch Schrauben ordnungsgemäß eindrehbar sind, die mit der ursprünglichen Achse der Schraubspindel nicht fluchten, ist in weiter vorteilhafter Weise die Schraubspindel auch quer zur Schraubvorschubrichtung federnd gelagert. Somit ist ein geringes Spiel der Schraubspindel orthogonal zur Schraubvorschubrichtung geschaffen, wodurch die Schraubspindel geringfügig kippen kann.So that screws that do not align with the original axis of the screw spindle can also be properly screwed in with the device according to the invention, the screw spindle is also resiliently mounted transversely to the screw feed direction. This creates a slight play of the screw spindle orthogonal to the screw feed direction, as a result of which the screw spindle can tilt slightly.
Hinsichtlich des Bereitstellens von einzuschraubenden Schrauben ist insbesondere unter dem Gesichtspunkt eines vollautomatischen Verbindens der in Rede stehenden Teile ein Einschießgerät zum Einschießen der vom Schrauber einzudrehenden Schrauben vorgesehen. Damit eine störungsfreie Förderung einzelner Schrauben zur Schraubspindel hin bzw. zu den zu verschraubenden Teilen gewährleistet ist, weist das Einschießgerät eine Reflektions-lichtschranke zur Überwachung und Regulierung dieser Vorgänge auf.With regard to the provision of screws to be screwed in, a shooting device for shooting in the screws to be screwed in by the screwdriver is provided, in particular from the point of view of a fully automatic connection of the parts in question. To ensure trouble-free delivery of individual screws to the screw spindle or to the parts to be screwed, the insertion device has a reflection light barrier to monitor and regulate these processes.
Schließlich lassen sich die Schrauber mittels Spindeln in ihrer Position verändern, wodurch die Schrauber auf unterschiedliche Schraubstellen eingestellt werden.Finally, the position of the screwdrivers can be changed by means of spindles, as a result of which the screwdrivers are set to different screwing points.
Nach dem erfindungsgemäßen Verfahren zum Verbinden von Teilen mit geringer Festigkeit, insbesondere zum verbinden von Masken, Formen, Gießereikernen, vorzugsweise von Sohlen- und Wassermantelkernen, werden zunächst,die zu verbindenden Teile mittels einer Greifvorrichtung erfäßt und gemeinsam verspannt. Danach werden die Teile im Arbeitsbereich eines Schraubers positioniert. Im Falle zu verschraubender Gießereikerne werden die Teile bzw. Kerne regelmäßig oberhalb eines oder mehrerer Schrauber positioniert. Danach wird eine oder mehrere Schrauben in den Schrauber eingeschossen. Die Teile werden verschraubt, wobei in besonders vorteilhafter Weise zur Vermeidung einer Beschädigung der Teile bzw. zur Vermeidung eines Sprödbruchs der Schraubvorschub, d.h. die Einschraubgeschwindigkeit, ohne Beeinträchtigung des Anpreßdruckes durch eine federnde Lagerung der Schraubspindel ausgeglichen ist.According to the inventive method for connecting parts with low strength, in particular for connecting masks, Molds, foundry cores, preferably of sole and water jacket cores, are first grasped, the parts to be connected by means of a gripping device and braced together. The parts are then positioned in the work area of a screwdriver. In the case of foundry cores to be screwed, the parts or cores are regularly positioned above one or more screwdrivers. Then one or more screws are shot into the screwdriver. The parts are screwed together, in a particularly advantageous manner to prevent damage to the parts or to avoid brittle fracture, the screw feed, ie the screwing speed, is compensated for by a resilient mounting of the screw spindle without impairing the contact pressure.
Zur Vermeidung einer Beschädigung der zu verbindenden Teile ist der Verfahrensschritt des Einschraubens der Schraube in weiter vorteilhafter Weise so ausgelegt, daß das Drehmoment des Schraubers durch eine vorzugsweise regulierbare automatische Abschaltkupplung bestimmt bzw. reguliert ist.To avoid damaging the parts to be connected, the method step of screwing in the screw is advantageously designed such that the torque of the screwdriver is determined or regulated by a preferably adjustable automatic shut-off clutch.
Es gibt nun verschiedene weitere Möglichkeiten, die Lehre der vorliegenden Erfindung in vorteilhafter Weise auszugestalten und weiterzubilden. Dazu ist einerseits auf die nachgeordneten Ansprüche, andererseits auf die nachfolgende Erläuterung eines Ausführungsbeispiels der Erfindung anhand der Zeichnung zu verweisen. In Verbindung mit der Erläuterung des bevorzugten Ausführungsbeispiels der Erfindung anhand der Zeichnung werden auch im allgemeinen bevorzugte Ausgestaltungen und Weiterbildungen der Lehre erläutert. In der Zeichnung zeigt
- Fig. 1
- in einer Seitenansicht, schematisch, ein Ausführungsbeispiel der erfindungsgemäßen Vorrichtung,
- Fig. 2
- in einer Vorderansicht, schematisch, die Vorrichtung aus Fig. 1,
- Fig. 3
- in einer Draufsicht, schematisch, die Vorrichtung aus Fig. 1,
- Fig. 4
- in einer vergrößerten Sprengdarstellung die zu verschraubenden Teile, den Schrauber und die Schraube,
- Fig. 5
- im Längsschnitt, teilweise und vergrößert, die erfindungsgemäße Vorrichtung und
- Fig. 6
- im Längsschnitt, schematisch, einen Schrauber der Vorrichtung aus Fig. 5.
- Fig. 1
- in a side view, schematically, an embodiment of the device according to the invention,
- Fig. 2
- in a front view, schematically, the device of FIG. 1,
- Fig. 3
- in a plan view, schematically, the device of FIG. 1,
- Fig. 4
- in an enlarged explosive view the parts to be screwed, the screwdriver and the screw,
- Fig. 5
- in longitudinal section, partially and enlarged, the device according to the invention and
- Fig. 6
- in longitudinal section, schematically, a screwdriver of the device from FIG. 5.
Die Figuren 1 bis 3, 5 und 6 zeigen ein Ausführungsbeispiel einer erfindungsgemäßen Vorrichtung einer erfindungsgemäßen Vorrichtung zum Verschrauben von Teilen 1, 2 mit geringer Festigkeit. Dabei handelt es sich um eine Schraubvorrichtung zum Verschrauben von Gießereikernen, nämlich um Sohlen- und Wassermantelkerne 1, 2.Figures 1 to 3, 5 and 6 show an embodiment of an inventive device of an inventive device for screwing
Zu der erfindungsgemäßen Vorrichtung gehören eine Greifvorrichtung 3 zum Erfassen der zu verschraubenden Gießereikerne 1, 2 und ein eine Schraubspindel 10 und eine Antriebseinrichtung 11 für die Schraubspindel 10 aufweisender Schrauber 6.The device according to the invention includes a
Gemäß der Darstellung in Fig. 6 ist die Schraubspindel 10 zumindest in Schraubvorschubrichtung federnd gelagert. Dies ist erkennbar dadurch erreicht, daß zur federnden Lagerung der Schraubspindel 10 zwischen der Antriebseinrichtung 11 der Schraubspindel 10 und der Schraubspindel 10 ein Federgehäuse 12 mit einem zwischen der Antriebseinrichtung 11 und der Schraubspindel 10 wirkenden Federelement 13 angeordnet ist. Auf dem Federelement 13 sitzt ein Mitnehmerbolzen 14 auf.According to the representation in FIG. 6, the
Desweiteren ist das Drehmoment der Antriebseinrichtung 11 bzw. des Schraubers 6 durch eine in der Antriebseinrichtung 11 vorgesehene, regulierbare automatische Abschaltkupplung bestimmt.Furthermore, the torque of the
Zum automatischen Einschießen der Schrauben 5 sind zum Halten der Schrauben 5 Klemmbacken 15 vorgesehen. Der erforderliche Haltedruck wird mittels pneumatischer oder hydraulischer Zylinder-Kolben-Anordnungen 16 erzeugt. Die Klemmbacken 15 öffnen lediglich zum Durchschieben der Schrauben 5.For automatic insertion of the
Beim Schrauben ggf. in den Bereich der Vorrichtung gelangende Partikel der zu verschraubenden Teile 1, 2 werden mittels einer Ausblasvorrichtung 17 ausgeblasen oder über eine Saugvorrichtung abgesaugt.Particles of the
In den Figuren ist nicht dargestellt, daß die Schraubspindel 10 auch quer zur Schraubvorschubrichtung federnd gelagert sein kann, so daß auch Schrauben 5 problemlos eindrehbar sind, die mit der ursprünglichen Achse der Schraubspindel 10 nicht fluchten.In the figures, it is not shown that the
Die Fig. 1 und 5 zeigen andeutungsweise, daß zum Einschießen der vom Schrauber 6 einzudrehenden Schrauben 5 ein Einschießgerät 4 vorgesehen ist. Das Einschießgerät 4 kann eine in den Fig. nicht gezeigte Vereinzelungseinrichtung zur Vereinzelung der Schrauben 5 aufweisen.1 and 5 indicate that a
Nachfolgend wird die Funktionsweise der erfindungsgemäßen Vorrichtung beschrieben. Die Teile 1, 2 bzw. der Sohlenkern 1 und der Wassermantelkern 2 werden zusammengesteckt oder -gefügt und mittels der Greifvorrichtung 3 ergriffen und gemeinsam verspannt. Anschließend werden die verspannten Teile 1, 2 über den Schrauber 6 verbracht. Anschließend wird eine Schraube 5 bzw. werden Schrauben 5 mittels des Einschießgeräts 4 pneumatisch durch die Transportschläuche 8 hindurch in die Klemmbacken 15 eingeschossen. Anschließend werden die Teile 1, 2 miteinander verschraubt. Die jeweilige Schraubposition der Spindel 10 ist über eine Einstellspindel 7 vorgebbar. Die Schraubspindeln 10 mit Antriebsmotor 11, Federgehäuse 12, Feder 13 und Mitnehmerbolzen 14 dienen zur schonenden Verschraubung der Teile 1, 2, wobei der Schraubvorschub bzw. die Einschraubgeschwindigkeit ausgeglichen ist, ohne daß der Anpreßdruck der Schraubspindel 10 auf die Schraube 5 beeinträchtigt ist. Die Schrauben werden durch die über den pneumatischen Zylinder 16 betätigbaren Klemmbacken 15 gehalten. Lediglich einer vollständigen Darstellung wegen sind mit den Bezugszeichen 18, 19 Kugellager und eine Lagerbuchse bezeichnet.The mode of operation of the device according to the invention is described below. The
Abschließend sei hier nochmals hervorgehoben, daß sich die erfindungsgemäße Lehre mit dem Verbinden von Teilengeringer Festigkeit befaßt. Das Verschrauben von Gießereikernen ist hier lediglich beispielhaft herangezogen worden.Finally, it should be emphasized here again that the teaching according to the invention deals with the connection of parts of low strength. The screwing of foundry cores has only been used here as an example.
Claims (13)
- Device for connecting parts (1, 2) of low strength, in particular for connecting masks, moulds, casting cores, preferably base and water jacket cores, characterised in that a gripper device (3) for grasping the parts (1, 2) to be connected and at least one screwing device (6) for screwing the parts together comprising a screw spindle (10) and a drive device (11) for the screw spindle (10) are provided; in that the screwing device (6) is arranged such that it can be adjusted by means of spindles (7); and in that the screw spindle (10) is mounted so as to be resilient at least in the screwing advance direction.
- Device according to Claim 1, characterised in that a spring housing (12) having at least one spring component (13) acting between the drive device (11) and the screw spindle (10) is disposed between the drive device (11) of the screw spindle (10) and the latter such that the screw spindle (10) is mounted resiliently.
- Device according to Claim 2, characterised in that the spring component (13) is in the form of a pressure spring.
- Device according to Claim 2 or 3, characterised in that a carrier bolt (14) is mounted on the spring component (13).
- Device according to any one of Claims 1 to 4, characterised in that the torque of the drive device (11) or of the screwing device (6) is determined by an automatic cut-off coupling which is provided in the drive device (11) and can preferably be regulated.
- Device according to any one of Claims 1 to 5, characterised in that the screw (5) to be screwed in is monitored by a detecting light scanner (20), preferably a reflective light scanner.
- Device according to any one of Claims 1 to 6, characterised in that clamping jaws (15) are provided for holding the screws (5) when they are automatically fired in; in that the holding pressure is generated by means of pneumatic or hydraulic cylinder-piston arrangements (16); and in that the clamping jaws (15) open in order for the screws (5) to be pushed through without impairing the centring of the screws.
- Device according to any one of Claims 1 to 7, characterised in that particles of the parts (1, 2) to be screwed together reaching the area of the device during the screwing process (5) are blown out by means of a blow-out device (17) or are sucked out by means of a suction device.
- Device according to any one of Claims 1 to 8, characterised in that the screw spindle (10) is also mounted resiliently transversely to the screwing advance direction such that screws (5) which are not aligned with the original axis of the screw spindle (10) can be inserted.
- Device according to any one of Claims 1 to 9, characterised in that a firing apparatus (4) is provided for firing in the screws (5) to be screwed in by the screwing device (6).
- Device according to Claim 10, characterised in that the firing device (4) comprises a separating device for separating the screws (5).
- Process for connecting parts (1, 2) of low strength, in particular for connecting masks, moulds, casting cores, preferably base and water jacket cores, characterised by the following method steps:- grasping and bracing of the parts (1, 2) to be connected by means of a gripping device (3);- positioning of the parts (1, 2) in the operating area of a screwing device (6); and- firing screws (5) into the screwing device (6) and screwing together the parts (1, 2), wherein the advance of the screw, ie, the velocity at which it is screwed in, is compensated by a resilient mounting of the screw spindle (10) without impairing the contact pressure.
- Process according to Claim 12, characterised in that, when a screw (5) is screwed in, the torque of the screwing device (6) is determined or regulated by an automatic cut-off coupling which can preferably be regulated.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3911635 | 1989-04-10 | ||
DE19893911635 DE3911635C1 (en) | 1989-04-10 | 1989-04-10 | Automatic screwing together of foundry cores - allowing cores to be assembled immediately after mfr. |
DE4004903 | 1990-02-16 | ||
DE19904004903 DE4004903C1 (en) | 1990-02-16 | 1990-02-16 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0467890A1 EP0467890A1 (en) | 1992-01-29 |
EP0467890B1 true EP0467890B1 (en) | 1993-06-02 |
Family
ID=25879758
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19900903594 Expired - Lifetime EP0467890B1 (en) | 1989-04-10 | 1990-03-01 | Process and device for screwing fragile parts |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0467890B1 (en) |
JP (1) | JPH07110394B2 (en) |
CA (1) | CA2051421A1 (en) |
ES (1) | ES2043359T3 (en) |
WO (1) | WO1990011848A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112621195B (en) * | 2020-11-30 | 2021-10-08 | 九江市海纳电讯技术有限公司 | Combiner processing is with assembly debugging apron processingequipment |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2549601A1 (en) * | 1975-11-05 | 1977-05-12 | Erich Klesatschke | Mechanical screw driver with head holding chuck - has tube form holder to hold screw head with some radial play to permit alignment |
JPS5784686A (en) * | 1980-11-17 | 1982-05-27 | Hitachi Ltd | Construction of screw driver rotation |
DE3424911A1 (en) * | 1984-07-06 | 1986-01-16 | Audi AG, 8070 Ingolstadt | Method of screwing a screw into thin-walled metal sheets and apparatus for carrying out the method |
JPS61180664A (en) * | 1985-02-04 | 1986-08-13 | Honda Motor Co Ltd | Casting method for siamese type cylinder block stock |
JPS61199551A (en) * | 1985-02-28 | 1986-09-04 | Isuzu Motors Ltd | Casting method for structural body having intricate hollow parts |
DE3614007A1 (en) * | 1986-04-25 | 1987-11-05 | Bosch Gmbh Robert | DEVICE FOR THE AUTOMATIC FEEDING AND TURNING IN OF SCREWS |
JPH0665448B2 (en) * | 1986-07-23 | 1994-08-24 | 本田技研工業株式会社 | Bolt tightening machine |
-
1990
- 1990-03-01 CA CA 2051421 patent/CA2051421A1/en not_active Abandoned
- 1990-03-01 ES ES90903594T patent/ES2043359T3/en not_active Expired - Lifetime
- 1990-03-01 WO PCT/DE1990/000140 patent/WO1990011848A1/en active IP Right Grant
- 1990-03-01 JP JP2503595A patent/JPH07110394B2/en not_active Expired - Fee Related
- 1990-03-01 EP EP19900903594 patent/EP0467890B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
CA2051421A1 (en) | 1990-10-11 |
JPH07110394B2 (en) | 1995-11-29 |
EP0467890A1 (en) | 1992-01-29 |
WO1990011848A1 (en) | 1990-10-18 |
ES2043359T3 (en) | 1993-12-16 |
JPH04506179A (en) | 1992-10-29 |
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