EP0385133B1 - Device for removing damaged spots from rubber parts - Google Patents

Device for removing damaged spots from rubber parts Download PDF

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Publication number
EP0385133B1
EP0385133B1 EP90102226A EP90102226A EP0385133B1 EP 0385133 B1 EP0385133 B1 EP 0385133B1 EP 90102226 A EP90102226 A EP 90102226A EP 90102226 A EP90102226 A EP 90102226A EP 0385133 B1 EP0385133 B1 EP 0385133B1
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EP
European Patent Office
Prior art keywords
socket
tool
cutting crown
cutting
carrier
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
EP90102226A
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German (de)
French (fr)
Other versions
EP0385133A1 (en
Inventor
Walter Kieninger
Ernst Füner
Herbert Hetzinger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Entwicklungszentrum fur Zerspanungstechnik & Co KG GmbH
Entwicklungszentrum fur Zerspanungstechnik GmbH and Co KG
Original Assignee
Entwicklungszentrum fur Zerspanungstechnik & Co KG GmbH
Entwicklungszentrum fur Zerspanungstechnik GmbH and Co KG
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Publication of EP0385133A1 publication Critical patent/EP0385133A1/en
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Publication of EP0385133B1 publication Critical patent/EP0385133B1/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/3846—Cutting-out; Stamping-out cutting out discs or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/32—Hand-held perforating or punching apparatus, e.g. awls
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/78—Tool of specific diverse material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/89—Tool or Tool with support
    • Y10T408/895—Having axial, core-receiving central portion
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/89—Tool or Tool with support
    • Y10T408/895—Having axial, core-receiving central portion
    • Y10T408/8953—Having axial, core-receiving central portion with lateral outlet

Definitions

  • the present invention relates to a device for removing damaged areas in rubber parts, in particular in rubber parts with reinforcing elements, such as steel belt tires.
  • the damaged areas are conventionally drilled out and repaired by vulcanization with a rubber plug.
  • drilling out the damaged areas is difficult, especially when the tire has reinforcing elements, such as an inserted steel belt.
  • the requirements for the tool are correspondingly different.
  • the damaged areas are removed with the help of conical rasps. It is particularly disadvantageous here that the wires of the steel belt or other inserts are not cut off cleanly, but rather are torn off. However, tearing off does not result in a smooth surface or regular round shape, which leads to the quality of the subsequently vulcanized point being greatly reduced.
  • a device on packaging machines which has a driven and rotating tool which is formed from a sleeve, the wall thickness of which tapers in the tool working direction essentially to an edge, and the outer peripheral surface of the Sleeve extends essentially parallel to its axis and the inner peripheral surface in the foremost region of the sleeve extends obliquely outwards.
  • the device of this prior art shows a cutting edge which is essentially in the form of a wave.
  • this corrugation has the disadvantage that it fails when cutting rubber parts with steel belt reinforcement. Due to the corrugation, when cutting the rubber, it will spring back due to its elastic expansion capacity, which means that a flat cut cannot be guaranteed over the entire circumferential surface. In addition, problems occur when the cutting edge hits steel belt parts. In addition, this unclean cut leads to leakage problems when screwing in prefabricated rubber repairs, since on the one hand there are spaces with free spaces whose irregularities cannot be compensated for by vulcanization, which can no longer be seen across the entire circumferential surface.
  • the device according to the invention ensures that both the tire rubber and the steel belt are exactly cut, which advantageously leads to a smooth surface of the point to be vulcanized, which also has a round shape of high quality.
  • the sleeve is formed from a cutting crown and a carrier sleeve, this advantageously results in a solution that is particularly simple in terms of tooling, since an adaptation of the Cutting crown to the geometry and material selection is easily possible.
  • the cutting crown can preferably be formed from a high-hard material, preferably hard metal, wherein the cutting crown design means that a relatively small amount of the expensive material, which also requires particularly high machining costs, is sufficient.
  • the cutting crown is fastened to the carrier sleeve, the connection being made in the simplest way by soldering.
  • the cutting crown and the carrier sleeve have soldering surfaces which are matched to one another. These soldering surfaces are preferably formed from inclined end sides of the cutting crown and the carrier sleeve, the end side of the cutting crown being designed as a conical jacket. This has the advantage that the cutting crown is guided through the soldering surface and centered itself.
  • a sawtooth profile is formed by the notches on the front edge of the sleeve or cutting crown, which can be adapted to the material to be machined both in geometry and type of cutting material, particularly good adaptability of the tool is achieved for the workpiece to be machined, so that For example, depending on the rubber compound and insert, the corresponding tool has the properties necessary for high-quality machining.
  • the carrier sleeve has a cutout, so that material which has penetrated into the cutting crown and carrier sleeve can be laterally ejected at the rear, and clogging of the cutting crown by appropriately cut out rubber plugs is avoided.
  • the recess is designed such that it begins in the vicinity of the cutting crown and extends up to an end region, whereby good guidance of the material which has been removed is made possible.
  • the carrier sleeve can be designed to be placed on a receptacle for a tool drive device.
  • it has an L-shaped recess in the region of its end opposite the cutting crown.
  • the receiving piece has at least one tool guide area for receiving the carrier sleeve, and preferably has a pin that can be brought into engagement with the L-shaped recess of the carrier sleeve. This advantageously results in a bayonet-like connection area, so that the carrier sleeve can be guided well on the one hand and can be connected and detached again in the simplest and fastest way on the other hand.
  • the receptacle has several, for example three, tool guide areas which have different diameters, so that carrier sleeves of different diameters can be adapted to produce different cutting surface sizes, each adapted to the size of the damaged area in the rubber part.
  • the receptacle piece can in turn be simply connected to the drive device, with adaptation to the conventional drive devices, for example drilling machines, being possible by means of a standardized machine receptacle area.
  • a device has a tool 1, which is formed from a cutting-crown-like sleeve 3 and a carrier sleeve 5.
  • the cutting crown 3 has notches 7, which produce a sawtooth-like profile of the tool leading edge 9.
  • the tool leading edge 9 is, as can be seen particularly clearly from FIG. 2, a tapering, knife-like edge, the cross section of the cutting crown 3 continuously increasing in the direction of the carrier sleeve 5 enlarged.
  • the cross-sectional enlargement is designed such that the outer circumferential wall 11 of the cutting crown 3 runs essentially parallel to its axis 13, so that the cut surface produced is essentially perpendicular to the plane of the workpiece.
  • the cutting crown 3 has an inner peripheral wall 15 which extends obliquely inwards from the tool front edge 9 in the direction of the axis 13.
  • the end side 17 of the cutting crown 3 opposite the upper edge 9 is designed as a beveled soldering surface.
  • the carrier sleeve 5 has a correspondingly bevelled upper edge 19.
  • the bevels are preferably chosen so that the upper edge 19 of the carrier sleeve 5 is chamfered inwards, so that the cutting crown 3 placed thereon aligns itself and is received in the carrier sleeve 5.
  • the cutting crown 3 is connected to the carrier sleeve 5 in the simplest manner by soldering, which represents a simple and robust connection. Furthermore, the soldering enables the cutting crown 3 to be detached from the carrier sleeve 5 by simple measures, for example in the event of wear of the cutting edge region, which makes it necessary to replace the cutting crown 3.
  • the notches 7 are preferably V-shaped, but the two legs of the V preferably have different angles to a plane or direction parallel to the axis 13.
  • the notches can also have a different shape, provided that there is a sawtooth effect.
  • the drive edge 23 of each notch 7 located in the direction of rotation - arrow 21 - is chamfered at an angle ⁇ with respect to the direction of the axis 13, which is greater than an angle ⁇ with which a trailing edge 25 is arranged inclined with respect to the direction of the axis 13.
  • the carrier sleeve 5 has a recess 27 which extends obliquely inwards with respect to the axis 13 of the carrier sleeve 5, which results in an enlarging opening.
  • the opening preferably extends, as can be seen from the side view according to FIG. 1, close to the axis of rotation, so that the separated rubber profiles can be brought out in this largest region.
  • the cutout 27 then ends in a region 29 that tapers again rapidly.
  • a recess 33 is formed which is provided for the connection of the carrier sleeve to a receiving piece 35 (FIGS. 5 and 7).
  • the arrangement on the circumference of the carrier sleeve 5 results from FIG. 3 and its design clearly from FIG. 4.
  • the recess 33 is L-shaped.
  • the cutout 33 enables the carrier sleeve 5 to be connected to the receiving piece 35 in a particularly simple manner.
  • the receptacle has a tool guide area 36 which, with a corresponding fit, is brought into contact with a guide surface 39 of the carrier sleeve 5, as can be clearly seen in FIG. 5.
  • the tool guide area 36 has a pin 37 protruding above it, which can be brought into engagement with the L-shaped recess 33, so that a bayonet-like connection area is created in the simplest way also offers a particularly simple and quickly detachable connection between the receptacle and the sleeve.
  • the receiving piece 35 has three tool guide areas 36, 36 ', 36' 'for receiving corresponding carrier sleeves 5, 5', 5 ''.
  • the respective corresponding parts are designated with the corresponding reference numerals, the reference numerals with 'and the larger tool with respect to the tool 1 with' 'for the smaller tool compared to the tool 1.
  • the receptacle 35 can also have a tool guide area which can be changed in its diameter continuously or stepwise, so that a corresponding adaptation to different carrier sleeve diameters and thus cutting crown diameters is possible.
  • a machine holder 41 is formed, which corresponds to the usual standard design, so that the receiving piece can be inserted into the chuck of a hand drill, for example.
  • 6 shows a top view of the machine holder 41 of the holder 35.
  • FIG. 7 shows a side view of the receiving piece 35 from FIG. 5, which is partially cut to illustrate the attachment of the pin 37. Corresponding parts of the receiving piece 35 are provided with the corresponding reference numerals.
  • damaged areas in rubber parts in particular steel belt tires, can be cleanly removed with the device according to the invention, a smooth and round cut surface being produced.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Turning (AREA)
  • Tyre Moulding (AREA)
  • Springs (AREA)

Abstract

The present invention refers to an apparatus for removing damaged portions of rubber components, in particular of steel-braced radial-ply tyres, including a driven and rotating tool. The tool (1) consists of a sleeve whose wall thickness tapers like a knife in the tool operating direction thus forming essentially an edge (9) and the front edge (9) of the tool has formed therein notches (7). It will be expedient when the outer circumferential surface (11) of the sleeve extends essentially parallel to the axis (13) thereof, and it will be expedient when the inner circumferential surface (15) extends at an oblique angle outwards in the front area of the sleeve. The sleeve can consist of a cutting crown (3) and of a carrier sleeve (5), the cutting crown (3) being preferably made of a material of high hardness, in particular of hard metal (FIG. 1).

Description

Die vorliegende Erfindung betrifft eine Vorrichtung zum Entfernen beschädigter Stellen in Gummiteilen, insbesondere in Gummiteilen mit Verstärkungselementen, wie Stahlgürtelreifen.The present invention relates to a device for removing damaged areas in rubber parts, in particular in rubber parts with reinforcing elements, such as steel belt tires.

Bei der Reparatur von Reifen von Kraftfahrzeugen werden die beschädigten Stellen herkömmlicherweise herausgebohrt und durch Vulkanisieren mit einem Gummipfropfen repariert. Das Herausbohren der beschädigten Stellen ist jedoch mit Schwierigkeiten verbunden, insbesondere dann, wenn der Reifen Verstärkungselemente, wie beispielsweise einen eingelegten Stahlgürtel, aufweist. Aufgrund dieser gänzlich unterschiedlichen Materialien sind die Anforderungen an das Werkzeug entsprechend unterschiedlich. Herkömmlicherweise werden die beschädigten Stellen mit Hilfe von kegeligen Raspeln beseitigt. Hierbei ist besonders nachteilig, daß die Drähte des Stahlgürtels bzw. sonstige Einlagen nicht sauber abgeschnitten werden, sondern mehr abgerissen werden. Durch das Abreißen entsteht jedoch keine glatte Oberfläche und auch keine regelmäßige runde Form, was dazu fuhrt, daß die Güte der anschließend vulkanisierten Stelle stark vermindert ist.When repairing motor vehicle tires, the damaged areas are conventionally drilled out and repaired by vulcanization with a rubber plug. However, drilling out the damaged areas is difficult, especially when the tire has reinforcing elements, such as an inserted steel belt. Because of these completely different materials, the requirements for the tool are correspondingly different. Conventionally, the damaged areas are removed with the help of conical rasps. It is particularly disadvantageous here that the wires of the steel belt or other inserts are not cut off cleanly, but rather are torn off. However, tearing off does not result in a smooth surface or regular round shape, which leads to the quality of the subsequently vulcanized point being greatly reduced.

Aus der DE-A-1 611 733 ist eine Vorrichtung an Verpackungsmaschinen bekannt, die ein angetriebenes und sich drehendes Werkzeug aufweist, das aus einer Hülse gebildet ist, deren Wandstärke sich in Werkzeugarbeitsrichtung im wesentlichen zu einer Kante messerartig verjüngt, und wobei die Außenumfangsfläche der Hülse im wesentlichen parallel zu ihrer Achse verläuft und die Innenumfangsfläche im vordersten Bereich der Hülse schräg nach außen verläuft.From DE-A-1 611 733 a device on packaging machines is known which has a driven and rotating tool which is formed from a sleeve, the wall thickness of which tapers in the tool working direction essentially to an edge, and the outer peripheral surface of the Sleeve extends essentially parallel to its axis and the inner peripheral surface in the foremost region of the sleeve extends obliquely outwards.

Die Vorrichtung dieses Standes der Technik zeigt dabei eine Schneide, die im wesentlichen in Wellenform ausgebildet ist. Diese Wellung hat jedoch den Nachteil, daß sie beim Schneiden von Gummiteilen mit Stahlgürtelbewehrung versagt. Aufgrund der Wellung wird beim Schneiden des Gummis dieser aufgrund seines elastischen Dehnungsvermögens wieder zurückfedern, wodurch über die ganze Umfangsfläche gesehen kein ebener Schnitt garantiert werden kann. Zusätzlich treten dabei Probleme beim Auftreffen der Schneide auf Stahlgürtelteile auf. Darüberhinaus kommt es aufgrund dieser unsauberen Schnittführung zu Undichtigkeitsproblemen beim Eindrehen von vorgefertigten Reparatur von Gummis, da einerseits Stellen mit Freiräumen vorhanden sind, deren Unregelmäßigkeiten auch nicht durch Vulkanisation, die nunmehr nicht mehr über die ganze Umfangsfläche gesehen, gewährleistet ist, ausgeglichen werden können.The device of this prior art shows a cutting edge which is essentially in the form of a wave. However, this corrugation has the disadvantage that it fails when cutting rubber parts with steel belt reinforcement. Due to the corrugation, when cutting the rubber, it will spring back due to its elastic expansion capacity, which means that a flat cut cannot be guaranteed over the entire circumferential surface. In addition, problems occur when the cutting edge hits steel belt parts. In addition, this unclean cut leads to leakage problems when screwing in prefabricated rubber repairs, since on the one hand there are spaces with free spaces whose irregularities cannot be compensated for by vulcanization, which can no longer be seen across the entire circumferential surface.

Der vorliegenden Erfindung liegt deshalb die Aufgabe zugrunde, eine Vorrichtung zum Entfernen beschädigter Stellen in Gummiteilen einschließlich Stahlgürtelreifen zu schaffen mit der eine glatte Oberfläche und eine gleichmäßige runde Form der herausgenommenen beschädigten Stellen erreicht wird.It is therefore an object of the present invention to provide a device for removing damaged areas in rubber parts, including steel belt tires, with which a smooth surface and a uniform round shape of the removed damaged areas is achieved.

Diese Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst.This object is solved by the features of claim 1.

Durch die erfindungsgemäße Vorrichtung wird erreicht, daß sowohl der Reifengummi als auch der Stahlgürtel exakt durchgetrennt werden, was vorteilhafterweise zu einer glatten Oberfläche der zu vulkanisierenden Stelle führt, die zudem eine runde Form hoher Güte aufweist.The device according to the invention ensures that both the tire rubber and the steel belt are exactly cut, which advantageously leads to a smooth surface of the point to be vulcanized, which also has a round shape of high quality.

Darüber hinaus ergibt sich ein durch das glatte Durchtrennen des Materials nur geringer Materialzerkleinerungsanteil, so daß einerseits der "Ausschneidevorgang" besonders schnell erfolgen kann und darüber hinaus ein relativ sauberes und umweltfreundliches Heraustrennen der Gummipfropfen ermöglicht wird, die zudem einer entsprechenden Wiederaufbereitung zugeführt werden können.In addition, there is only a small amount of material comminution due to the smooth cutting of the material, so that on the one hand the "cutting process" can take place particularly quickly and, moreover, a relatively clean and environmentally friendly removal of the rubber plugs is made possible, which can also be fed to a corresponding reprocessing.

Weitere Vorteile der vorliegenden Erfindung ergeben sich aus den Unteransprüchen.Further advantages of the present invention result from the subclaims.

Wird die Hülse aus einer Schneidkrone und einer Trägerhülse gebildet, so ergibt sich vorteilhaft eine besonders werkzeugtechnisch einfache Lösung, da eine Anpassung der Schneidkrone an die Geometrie und Werkstoffauswahl leicht möglich ist.If the sleeve is formed from a cutting crown and a carrier sleeve, this advantageously results in a solution that is particularly simple in terms of tooling, since an adaptation of the Cutting crown to the geometry and material selection is easily possible.

Vorzugsweise kann demzufolge die Schneidkrone aus einem hochharten Werkstoff, vorzugsweise Hartmetall, ausgebildet werden, wobei durch die Schneidkronenausbildung eine relativ geringe Menge des teuren Werkstoffs, der zudem besonders hohe Bearbeitungskosten erfordert, ausreicht.Accordingly, the cutting crown can preferably be formed from a high-hard material, preferably hard metal, wherein the cutting crown design means that a relatively small amount of the expensive material, which also requires particularly high machining costs, is sufficient.

In einer bevorzugten Ausführungsform wird die Schneidkrone auf der Trägerhülse befestigt, wobei die Verbindung auf einfachste Weise durch Löten erfolgt. Demzufolge weisen die Schneidkrone und die Trägerhülse einander angepaßte Lötflächen auf. Diese Lötflächen sind vorzugsweise aus schrägverlaufenden Endseiten der Schneidkrone und der Trägerhülse gebildet, wobei die Endseite der Schneidkrone als Kegelmantel ausgebildet ist. Dies bringt den Vorteil mit sich, daß durch die Lötfläche die Schneidkrone geführt und selbst zentriert wird.In a preferred embodiment, the cutting crown is fastened to the carrier sleeve, the connection being made in the simplest way by soldering. As a result, the cutting crown and the carrier sleeve have soldering surfaces which are matched to one another. These soldering surfaces are preferably formed from inclined end sides of the cutting crown and the carrier sleeve, the end side of the cutting crown being designed as a conical jacket. This has the advantage that the cutting crown is guided through the soldering surface and centered itself.

Dadurch, daß durch die Kerben an der Vorderkante der Hülse bzw. Schneidkrone ein Sägezahnprofil ausgebildet ist, das sowohl in Geometrie als auch Schneidstoffart dem zu bearbeitendem Material anpaßbar ist, wird für das jeweils zu bearbeitende Werkstück eine besonders gute Anpaßparkeit des Werkzeugs erreicht, so daß beispielsweise je nach Gummimischung und Einlage das entsprechende Werkzeug die für die qualitativ hochwertige Bearbeitung notwendigen Eigenschaften besitzt.Characterized in that a sawtooth profile is formed by the notches on the front edge of the sleeve or cutting crown, which can be adapted to the material to be machined both in geometry and type of cutting material, particularly good adaptability of the tool is achieved for the workpiece to be machined, so that For example, depending on the rubber compound and insert, the corresponding tool has the properties necessary for high-quality machining.

In einer bevorzugten Ausführungsform weist die Trägerhülse eine Aussparung auf, so daß in die Schneidkrone und Trägerhülse eingedrungenes Material hinten seitlich wieder ausgeworfen werden kann, und ein Verstopfen der Schneidkrone durch entsprechend herausgeschnittene Gummipfropfen vermieden wird.In a preferred embodiment, the carrier sleeve has a cutout, so that material which has penetrated into the cutting crown and carrier sleeve can be laterally ejected at the rear, and clogging of the cutting crown by appropriately cut out rubber plugs is avoided.

Vorteilhafterweise ist die Aussparung so ausgebildet, daß sie in der Nähe der Schneidkrone beginnt und sich vergrößernd bis zu einem Endbereich erstreckt, wobei eine gute Führung des herausgetrennten Materials ermöglicht wird.Advantageously, the recess is designed such that it begins in the vicinity of the cutting crown and extends up to an end region, whereby good guidance of the material which has been removed is made possible.

Zur Ausbildung einer besonders einfachen Aufnahme der Trägerhülse kann diese auf ein Aufnahmestück für eine Werkzeugantriebseinrichtung aufsetzbar ausgebildet sein. Für eine schnelle Auswechselbarkeit bzw. Aufnahme der Trägerhülse weist diese im Bereich ihres der Schneidkrone gegenüberliegenden Endes eine L-förmige Aussparung auf. Das Aufnahmestück weist wenigstens einen Werkzeugführungsbereich zur Aufnahme der Trägerhülse auf, und weist vorzugsweise einen Zapfen auf, der in Eingriff mit der L-förmigen Aussparung der Trägerhülse bringbar ist. Dies ergibt vorteilhafterweise einen bajonettartigen Verbindungsbereich, so daß die Trägerhülse einerseits gut geführt und andererseits auf einfachste und schnellste Weise mit der Antriebseinrichtung verbunden und wieder gelöst werden kann.To form a particularly simple receptacle of the carrier sleeve, it can be designed to be placed on a receptacle for a tool drive device. For a quick interchangeability or reception of the carrier sleeve, it has an L-shaped recess in the region of its end opposite the cutting crown. The receiving piece has at least one tool guide area for receiving the carrier sleeve, and preferably has a pin that can be brought into engagement with the L-shaped recess of the carrier sleeve. This advantageously results in a bayonet-like connection area, so that the carrier sleeve can be guided well on the one hand and can be connected and detached again in the simplest and fastest way on the other hand.

Vorteilhafterweise weist das Aufnahmestück mehrere, beispielsweise drei Werkzeugführungsbereiche auf, welche unterschiedliche Durchmesser aufweisen, so daß Trägerhülsen unterschiedlicher Durchmesser zur Erzeugung unterschiedlicher Schnittflächengrößen, jeweils angepaßt an die Größe der beschädigten Stelle in den Gummiteil, anpaßbar sind.Advantageously, the receptacle has several, for example three, tool guide areas which have different diameters, so that carrier sleeves of different diameters can be adapted to produce different cutting surface sizes, each adapted to the size of the damaged area in the rubber part.

Weist das Aufnahmestück an seinem dem Werkzeugführungsbereich gegenüberliegenden Ende einen Maschinenaufnahmebereich auf, so kann das Aufnahmestück wiederum einfach mit der Antriebsvorrichtung verbunden werden, wobei durch einen standardisierten Maschinenaufnahmebereich eine Anpassung an die herkömmlichen Antriebseinrichtungen, beispielsweise Bohrmaschinen, möglich ist.If the receptacle has a machine receptacle area at its end opposite the tool guide area, the receptacle piece can in turn be simply connected to the drive device, with adaptation to the conventional drive devices, for example drilling machines, being possible by means of a standardized machine receptacle area.

Weitere Einzelheiten, Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispiels unter Bezugnahme auf die Zeichnung. Darin zeigt:

Fig. 1
eine teilweise geschnittene Draufsicht auf eine bevorzugte Ausführungsform des Werkzeugs der erfindungsgemäßen Vorrichtung;
Fig. 2
eine vergrößerte Darstellung der Einzelheit X von Fig. 1;
Fig. 3
eine Ansicht auf das untere Ende des Werkzeugs der erfindungsgemäßen Vorrichtung von Fig. 1;
Fig. 4
eine Teilschnittansicht gemäß der Linie A-B von Fig. 3;
Fig. 5
eine bevorzugte Ausführungsform eines Aufnahmestücks der erfindungsgemäßen Vorrichtung zur Aufnahme von Werkzeugen unterschiedlichen Durchmessers;
Fig. 6
eine Draufsicht auf die Maschinenaufnahme des Aufnahmestücks; und
Fig. 7
eine teilweise geschnittene Seitenansicht auf das Aufnahmestück.
Further details, features and advantages of the invention result from the following description of an embodiment with reference to the drawing. It shows:
Fig. 1
a partially sectioned plan view of a preferred embodiment of the tool of the device according to the invention;
Fig. 2
an enlarged view of the detail X of Fig. 1;
Fig. 3
a view of the lower end of the tool of the device according to the invention of Fig. 1;
Fig. 4
a partial sectional view taken along line AB of Fig. 3;
Fig. 5
a preferred embodiment of a receiving piece of the device according to the invention for receiving tools of different diameters;
Fig. 6
a plan view of the machine holder of the receiving piece; and
Fig. 7
a partially sectioned side view of the receptacle.

Gemäß Fig. 1 weist eine Vorrichtung ein Werkzeug 1 auf, das aus einer schneidkronenartigen Hülse 3 und einer Trägerhülse 5 gebildet ist. Am vorderen Werkzeugende weist die Schneidkrone 3 Kerben 7 auf, die ein sägezahnartiges Profil der Werkzeugvorderkante 9 erzeugen. Die Werkzeugvorderkante 9 ist, wie besonders aus Fig. 2 deutlich hervorgeht, eine spitz zulaufende, messerartige Kante, wobei sich der Querschnitt der Schneidkrone 3 in Richtung Trägerhülse 5 kontinuierlich vergrößert.1, a device has a tool 1, which is formed from a cutting-crown-like sleeve 3 and a carrier sleeve 5. At the front tool end, the cutting crown 3 has notches 7, which produce a sawtooth-like profile of the tool leading edge 9. The tool leading edge 9 is, as can be seen particularly clearly from FIG. 2, a tapering, knife-like edge, the cross section of the cutting crown 3 continuously increasing in the direction of the carrier sleeve 5 enlarged.

Die Querschnittsvergrößerung ist dabei so ausgebildet, daß die äußere Umfangswand 11 der Schneidkrone 3 im wesentlichen parallel zu ihrer Achse 13 verläuft, so daß die erzeugte Schnittfläche im wesentlichen senkrecht zur Ebene des Werkstücks verläuft. Die Schneidkrone 3 weist eine innere Umfangswand 15 auf, welche von der Werkzeugvorderkante 9 schräg nach innen in Richtung auf die Achse 13 verläuft. Die der Oberkante 9 gegenüberliegende Endseite 17 der Schneidkrone 3 ist als abgeschrägte Lötfläche ausgebildet. Hierzu weist die Trägerhülse 5 einen entsprechend abgeschrägten oberen Rand 19 auf. Die Schrägen sind bevorzugt so gewählt, daß der obere Rand 19 der Trägerhülse 5 nach innen abgeschrägt ist, so daß die darauf gesetzte Schneidkrone 3 sich selbst zentrierend ausrichtet und in der Trägerhülse 5 aufgenommen wird. Die Verbindung der Schneidkrone 3 mit der Trägerhülse 5 erfolgt auf einfachste Weise durch Löten, was eine einfache und widerstandsfähige Verbindung darstellt. Weiterhin ermöglicht die Lötung ein durch einfache Maßnahmen erzielbares Lösen der Schneidkrone 3 von der Trägerhülse 5, beispielsweise für den Fall der Abnutzung des Schneidkantenbereichs, der ein Auswechseln der Schneidkrone 3 erforderlich macht.The cross-sectional enlargement is designed such that the outer circumferential wall 11 of the cutting crown 3 runs essentially parallel to its axis 13, so that the cut surface produced is essentially perpendicular to the plane of the workpiece. The cutting crown 3 has an inner peripheral wall 15 which extends obliquely inwards from the tool front edge 9 in the direction of the axis 13. The end side 17 of the cutting crown 3 opposite the upper edge 9 is designed as a beveled soldering surface. For this purpose, the carrier sleeve 5 has a correspondingly bevelled upper edge 19. The bevels are preferably chosen so that the upper edge 19 of the carrier sleeve 5 is chamfered inwards, so that the cutting crown 3 placed thereon aligns itself and is received in the carrier sleeve 5. The cutting crown 3 is connected to the carrier sleeve 5 in the simplest manner by soldering, which represents a simple and robust connection. Furthermore, the soldering enables the cutting crown 3 to be detached from the carrier sleeve 5 by simple measures, for example in the event of wear of the cutting edge region, which makes it necessary to replace the cutting crown 3.

Wie weiterhin aus Fig. 2 ersichtlich ist, sind die Kerben 7 vorzugsweise V-förmig ausgebildet, wobei jedoch bevorzugt die beiden Schenkel des V unterschiedliche Winkel zu einer zur Achse 13 parallelen Ebene oder Richtung aufweisen. Die Kerben können auch eine andere Form haben, soweit eine Sägezahnwirkung gegeben ist. Die sich in Drehrichtung - Pfeil 21 - befindliche Antriebskante 23 jeder Kerbe 7 ist unter einem Winkel α gegenüber der Richtung der Achse 13 abgeschrägt, der größer ist als ein Winkel ß, mit dem eine Nachlaufkante 25 gegenüber der Richtung der Achse 13 geneigt angeordnet ist. Dies hat den Vorteil, daß durch die große Schräge das Material entsprechend exakt durchtrennbar ist und durch die geringe Schräge der Nachlaufkante 25 eine entsprechende Verkürzung des Kerbenbereichs möglich ist, so daß insgesamt eine hohe Anzahl von Kerben 7 am Umfang der Schneidkrone 3 ausgebildet werden kann.As can also be seen from FIG. 2, the notches 7 are preferably V-shaped, but the two legs of the V preferably have different angles to a plane or direction parallel to the axis 13. The notches can also have a different shape, provided that there is a sawtooth effect. The drive edge 23 of each notch 7 located in the direction of rotation - arrow 21 - is chamfered at an angle α with respect to the direction of the axis 13, which is greater than an angle β with which a trailing edge 25 is arranged inclined with respect to the direction of the axis 13. This has the advantage that due to the large slope Material can be cut exactly according to and the corresponding slope of the notch area is possible due to the small slope of the trailing edge 25, so that a large number of notches 7 can be formed on the circumference of the cutting crown 3.

Die Trägerhülse 5 weist ausgehend von ihrem vorderen Bereich, der in Verbindung mit der Schneidkrone 3 steht, eine Aussparung 27 auf, welche bezüglich der Achse 13 der Trägerhülse 5 schräg nach innen verläuft, wodurch sich eine sich vergrößernde Öffnung ergibt. Vorzugsweise reicht die Öffnung, wie aus der Seitenansicht gemäß Fig. 1 ersichtlich ist, bis nahe an die Drehachse heran, so daß in diesem größten Bereich ein Ausbringen der abgetrennten Gummiprofile möglich ist. Die Aussparung 27 endet dann in einem sich wieder schnell verjüngenden Bereich 29.Starting from its front area, which is in connection with the cutting crown 3, the carrier sleeve 5 has a recess 27 which extends obliquely inwards with respect to the axis 13 of the carrier sleeve 5, which results in an enlarging opening. The opening preferably extends, as can be seen from the side view according to FIG. 1, close to the axis of rotation, so that the separated rubber profiles can be brought out in this largest region. The cutout 27 then ends in a region 29 that tapers again rapidly.

Im dem dem oberen Rand 19 entgegengesetzten Endbereich 31 der Trägerhülse 5 ist eine Aussparung 33 ausgebildet, die für die Verbindung der Trägerhülse mit einem Aufnahmestück 35 (Fig. 5 und 7) vorgesehen ist. Die Anordnung am Umfang der Trägerhülse 5 ergibt sich aus Fig. 3 und deren Ausbildung deutlich aus Fig. 4. Hier wird deutlich, daß die Aussparung 33 L-förmig ausgebildet ist.In the end region 31 of the carrier sleeve 5 opposite the upper edge 19, a recess 33 is formed which is provided for the connection of the carrier sleeve to a receiving piece 35 (FIGS. 5 and 7). The arrangement on the circumference of the carrier sleeve 5 results from FIG. 3 and its design clearly from FIG. 4. Here it is clear that the recess 33 is L-shaped.

Durch die Aussparung 33 wird die Möglichkeit einer besonders einfachen Verbindung der Trägerhülse 5 mit dem Aufnahmestück 35 ermöglicht. Hierzu weist das Aufnahmestück einen Werkzeugführungsbereich 36 auf, der mit einer entsprechenden Passung zur Anlage an eine Führungsfläche 39 der Trägerhülse 5, wie dies deutlich aus Fig. 5 ersichtlich ist, gebracht wird. Zur Verbindung der Trägerhülse mit dem Aufnahmestück 35 weist der Werkzeugführungsbereich 36 einen über ihn hervorstehenden Zapfen 37 auf, der in Eingriff bringbar ist mit der L-förmigen Aussparung 33, so daß auf einfachste Weise ein bajonettartiger Verbindungsbereich geschaffen ist, der zudem eine besonders einfache und schnell lösliche Verbindung zwischen Aufnahmestück und der Hülse bietet.The cutout 33 enables the carrier sleeve 5 to be connected to the receiving piece 35 in a particularly simple manner. For this purpose, the receptacle has a tool guide area 36 which, with a corresponding fit, is brought into contact with a guide surface 39 of the carrier sleeve 5, as can be clearly seen in FIG. 5. To connect the carrier sleeve to the receptacle 35, the tool guide area 36 has a pin 37 protruding above it, which can be brought into engagement with the L-shaped recess 33, so that a bayonet-like connection area is created in the simplest way also offers a particularly simple and quickly detachable connection between the receptacle and the sleeve.

Wie aus Fig. 5 ersichtlich, weist das Aufnahmestück 35 drei Werkzeugführungsbereiche 36, 36', 36'' auf für die Aufnahme von entsprechenden Trägerhülsen 5, 5', 5''. Die jeweils entsprechenden Teile sind mit den entsprechenden Bezugsziffern bezeichnet, wobei für das gegenüber dem Werkzeug 1 kleinere Werkzeug die Bezugsziffern mit ' und das gegenüber dem Werkzeug 1 größere Werkzeug mit '' ergänzt sind.5, the receiving piece 35 has three tool guide areas 36, 36 ', 36' 'for receiving corresponding carrier sleeves 5, 5', 5 ''. The respective corresponding parts are designated with the corresponding reference numerals, the reference numerals with 'and the larger tool with respect to the tool 1 with' 'for the smaller tool compared to the tool 1.

In einer alternativen Ausführungsform kann das Aufnahmestück 35 jedoch auch einen sich kontinuierlich oder schrittweise in seinem Durchmesser veränderbaren Werkzeugführungsbereich aufweisen, so daß eine entsprechende Anpassung an unterschiedliche Trägerhülsendurchmesser und damit Schneidkronendurchmesser möglich ist.In an alternative embodiment, however, the receptacle 35 can also have a tool guide area which can be changed in its diameter continuously or stepwise, so that a corresponding adaptation to different carrier sleeve diameters and thus cutting crown diameters is possible.

An dem Werkzeugführungsbereich gegenüberliegenden Ende des Aufnahmestücks 35 ist eine Maschinenaufnahme 41 ausgebildet, die der üblichen Standardausführung entspricht, so daß das Aufnahmestück beispielsweise in das Futter einer Handbohrmaschine eingeführt werden kann. Fig. 6 zeigt eine Draufsicht auf die Maschinenaufnahme 41 des Aufnahmestücks 35.At the tool guide area opposite end of the receiving piece 35, a machine holder 41 is formed, which corresponds to the usual standard design, so that the receiving piece can be inserted into the chuck of a hand drill, for example. 6 shows a top view of the machine holder 41 of the holder 35.

Fig. 7 zeigt eine Seitenansicht des Aufnahmestücks 35 von Fig. 5, welches zur Verdeutlichung der Anbringung des Zapfens 37 teilweise geschnitten ist. Entsprechende Teile des Aufnahmestücks 35 sind mit den entsprechenden Bezugsziffern versehen.FIG. 7 shows a side view of the receiving piece 35 from FIG. 5, which is partially cut to illustrate the attachment of the pin 37. Corresponding parts of the receiving piece 35 are provided with the corresponding reference numerals.

Aus Vorgenanntem ergibt sich zusammenfassend, daß mit der erfindungsgemäßen Vorrichtung beschädigte Stellen in Gummiteilen, insbesondere Stahlgürtelreifen, sauber herausgetrennt werden können, wobei eine glatte und runde Schnittfläche erzeugt werden kann.From the foregoing, it can be summarized that damaged areas in rubber parts, in particular steel belt tires, can be cleanly removed with the device according to the invention, a smooth and round cut surface being produced.

Claims (17)

  1. Device for removing damaged areas in rubber parts including steel-reinforced parts of steel breaker tyres, with a driven rotating tool (1, 1', 1'') which is formed from a socket of which the wall thickness tapers in the tool working direction essentially to an edge (9) after the fashion of a blade, and the outer circumferential surface (11) of the socket extends essentially parallel to its axis (13) and the inner circumferential surface (15) extends obliquely outwards in the foremost region of the socket, wherein in the front edge (9) of the tool are formed notches (7) which interrupt the edge (9), wherein the notches (7) in each case have an axial depth and a circumferential surface area which are sufficient to leave a plurality of segments extending in the circumferential direction.
  2. Device according to claim 1, characterised in that the socket is formed from a cutting crown (3, 3', 3'') and a carrier socket (5, 5', 5'').
  3. Device according to claim 2, characterised in that the cutting crown (3, 3', 3'') is formed from a very hard material, preferably hard metal.
  4. Device according to claim 2 or 3, characterised in that the cutting crown (3, 3', 3'') is fixed on the carrier socket (5, 5', 5''), wherein the connection is made preferably by soldering.
  5. Device according to claim 4, characterised in that the cutting crown (3, 3', 3'') and the carrier socket (5, 5', 5'') comprise soldering faces (17, 19) adapted to each other.
  6. Device according to claim 5, characterised in that the soldering faces (17, 19) are formed from obliquely extending end sides of the cutting crown (3, 3', 3'') and carrier socket (5, 5', 5''), wherein the end side (17) of the cutting crown (3, 3', 3'') is constructed as a cone wall.
  7. Device according to any of claims 1 to 6, characterised in that by the notches (7) at the front edge (9) of the socket or cutting crown (3, 3', 3'') there is formed a sawtooth profile which both in geometry and in type of cutting material can be adapted to the materials to be worked.
  8. Device according to any of claims 2 to 7, characterised in that the carrier socket (5, 5', 5'') comprises a recess (27, 27', 27'').
  9. Device according to claim 8, characterised in that the recess (27, 27', 27'') begins in the vicinity of the cutting crown (3, 3', 3'') and extends with increasing size as far as an end region (29).
  10. Device according to any of claims 2 to 9, characterised in that the carrier socket (5, 5', 5'') can be mounted on a receptacle piece (35) of a drive device.
  11. Device according to any of claims 2 to 10, characterised in that the carrier socket (5, 5', 5'') comprises an L-shaped recess in the region of its end opposite the cutting crown (3, 3', 3'').
  12. Device according to claim 10 or 11, characterised in that the receptacle piece (35) comprises at least one tool guiding region (36, 36', 36'') for receiving the carrier socket (5, 5', 5'').
  13. Device according to claim 12, characterised in that the tool guiding region (36, 36', 36'') comprises a pin (37, 37', 37'') which protrudes at its circumference and which can be brought into engagement with the L-shaped recess (33, 33', 33'') of the carrier socket (5, 5', 5'').
  14. Device according to claim 12 or 13, characterised in that the receptacle piece (35) comprises several, preferably three tool guiding regions (36, 36', 36'') which have different diameters for receiving carrier sockets (5, 5', 5'') of different diameters.
  15. Device according to any of claims 10 to 14, characterised in that the receptacle piece (35) comprises a machine receiving region (41) at its end opposite the tool guiding region.
  16. Device according to claim 1, characterised in that the tool is formed from a socket with a cutting crown (3, 3', 3'').
  17. Device according to claim 16, characterised in that the cutting crown is formed from a very hard socket (3, 3', 3'').
EP90102226A 1989-02-17 1990-02-05 Device for removing damaged spots from rubber parts Expired - Lifetime EP0385133B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8901906U DE8901906U1 (en) 1989-02-17 1989-02-17 Device for removing damaged areas in rubber parts
DE8901906U 1989-02-17

Publications (2)

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EP0385133A1 EP0385133A1 (en) 1990-09-05
EP0385133B1 true EP0385133B1 (en) 1995-05-03

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US (1) US5054971A (en)
EP (1) EP0385133B1 (en)
AT (1) ATE121984T1 (en)
DE (2) DE8901906U1 (en)

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CN110519932B (en) * 2019-09-03 2021-10-01 何翔鹤 Circuit board drilling device based on wiring coil is electrically conductive

Also Published As

Publication number Publication date
EP0385133A1 (en) 1990-09-05
ATE121984T1 (en) 1995-05-15
DE59008989D1 (en) 1995-06-08
US5054971A (en) 1991-10-08
DE8901906U1 (en) 1989-05-24

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