EP0556149B1 - Machining disc - Google Patents

Machining disc Download PDF

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Publication number
EP0556149B1
EP0556149B1 EP93810006A EP93810006A EP0556149B1 EP 0556149 B1 EP0556149 B1 EP 0556149B1 EP 93810006 A EP93810006 A EP 93810006A EP 93810006 A EP93810006 A EP 93810006A EP 0556149 B1 EP0556149 B1 EP 0556149B1
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EP
European Patent Office
Prior art keywords
working
recess
blade according
centre
working blade
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Expired - Lifetime
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EP93810006A
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German (de)
French (fr)
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EP0556149A1 (en
Inventor
Paul Dummermuth
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Pamag AG
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Pamag AG
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Priority claimed from CH197392A external-priority patent/CH683507A5/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/18—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by milling, e.g. channelling by means of milling tools
    • B28D1/181—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by milling, e.g. channelling by means of milling tools using cutters loosely mounted on a turning tool support

Definitions

  • the invention relates to a processing lamella with the features of the preamble of claim 1.
  • US Pat. No. 1,964,746 shows such a device of the type of stone, floor cleaning or floor roughening machine that has been formed independently for several decades. For example, 50 to 100 individual fins are used on a rotor cage rod. The effectiveness of the processing slats is tangential, since the surface cleaning devices mostly have to process even, stationary surfaces evenly. For this purpose, the processing lamellae are lined up in relatively large numbers and individually stored directly on a rotor cage rod.
  • the rotor itself has a plurality of rotor cage bars arranged in a circular path so that when the machine tool is advanced, the surface is as uniform as possible, in particular from stone and concrete floors.
  • the object of the invention was now to remedy the disadvantages of the known machining lamellae, in particular to increase the surface roughening or surface cleaning effect under comparable conditions.
  • the solution according to the invention is characterized in that the recess has a plurality of semicircular sliding guides and in such a way that a hammer-like, eccentric machining point is assigned to the center of the recess, but in opposite directions, in each case to a sliding guide.
  • a hammer-like, eccentric machining point is assigned to the center of the recess, but in opposite directions, in each case to a sliding guide.
  • An important core approach lies in the interaction of the required semi-circular sliding guide according to the invention and the processing point designed to be hammer-like for this purpose.
  • the conceptual model is therefore no longer the chisel that acts in a quick form, but the one on the end (on the hammer handle) Sharp hammer, roughly analogous to the classic hammer mills for breaking stones.
  • the processing lamella does not jump into the next guide when it first makes contact or strikes the processing surface, and a rotating chatter movement is generated even less.
  • the processing lamella uses the maximum kinetic energy via the processing point in a strongly guided circular movement and enables precise processing. It is consciously accepted that the processing lamella does not change the bearing point after each stroke or circulation. Since the machining process is not continuous over a long period of time, there are sufficient changes in position with respect to the sliding guide, so that all machining points wear evenly. The clear assignment of the sliding guide point to the processing point is very important for success.
  • the invention allows various, particularly advantageous configurations. In individual applications, it has been shown that at a certain number of revolutions per minute, the processing lamellae rotate in a middle position and only have a greatly reduced processing effect.
  • the machining point is therefore preferably offset with respect to the opposite sliding guide point in the machining direction of rotation.
  • the transfer is regarding an axis through the center of the recess and a semicircular sliding guide preferably selected less than 30 degrees, particularly preferably 10-25 degrees. An optimum could be found at a 20 degree offset.
  • the distance of the actual center of rotation of the sliding guide to the center of the recess in relation to the distance from the center and a machining point is preferably selected at least about 1: 3.
  • the machining lamella has an odd number of sliding guides, preferably three, each with a turning center, and three machining points. If you choose three sliding guides, they will look like a three-leaf clover, with the three machining points also being offset by 120 °. In this way, the holding section of the processing lamella with the lowest material concentration lies exactly opposite the striking section with the largest material concentration, the sliding guides being on the "light" side. It is also very advantageous if the processing points are attached to a tooth-shaped, projecting hammer nose. The transition from one sliding guide to the next is preferably designed as a convex curve directed towards the center of the recess and as a reinforcement of the impact nose.
  • the eccentric sliding guides enclose at least an angle of approximately 180 ° and lead against the imaginary center via a rolling shoulder to the adjacent sliding guide.
  • the sliding guides advantageously have a symmetrical shape with respect to an imaginary axis: center recess / center of rotation, preferably one machining point each being arranged on an axis of symmetry.
  • the processing point preferably has an inserted hard metal tip or a hard metal plate, which are attached to a tooth-like material thickening, with an approximately radial tooth flank arranged in the working direction.
  • a processing lamella 1 is designed as a three-part shape, a central recess 2 having the shape of a three-leaf clover and each of the three “leaves” being a sliding guide 3.
  • the sliding guide 3 is at least approximately a semicircle, which extends from its center of rotation and extends over an angle of approximately 180 °.
  • the processing lamella 1 is held by a rotor cage rod 4 and moves in a clockwise direction in FIG. 1 on a rotating rotor cage, not shown.
  • the centrifugal force Zf acts mainly in free circulation, so that the processing point ZB occupies the outermost peripheral point for a work position and is held rotatably about a center Z of the sliding guide 3Z.
  • the slide guides 3Z, 3Y, 3X each have a radius Ri which is opposite to the three slide guides and which only makes up a fraction of the radius R3 of each slide guide 3.
  • the processing lamella has three processing points ZB, YB and XB, which, due to the three-part structure, have a 60 ° offset to the next axis AX, respectively AZ, respectively AY.
  • the diameter of the sliding guide 3 is a little more than the diameter of the rotor cage rod 4, which is designed as a loose sliding seat.
  • the processing points each have an impact tip 5, which is formed from a soldered hard metal tip. At a standstill, the processing lamella 1 would slide downward in the position shown, so that the rotor cage rod 4 would be moved into the center of rotation Z.
  • FIG. 2 shows a processing lamella which, instead of a striking tip 5, has three hard metal plates 6 which are well suited for cleaning purposes.
  • FIG. 3 shows a sequence of movements of a processing lamella in four successive positions.
  • position A only the centrifugal force acts in addition to the weight.
  • the striking tip 5 is the outermost, peripheral tip of the processing lamella and lies on a radius that passes through the center of rotation RZ and through at the same time the center Z of the sliding guide 3 goes.
  • the striking tip 5 experiences resistance, so that the processing lamella 1 begins to deflect the center Z, deflection angle.
  • the processing lamella now rotates one or more times around the center of the sliding guide.
  • the mass distribution means that the optimum angular position is reached again after about one revolution.
  • the processing lamella can assume any other position within the boundaries of the recess, for example by the action of unevenness and the shocks it produces or by jerky movement. This does not endanger the machining quality, but protects the mechanical parts of the machine against excessive impact loads.
  • FIG. 4 shows the core elements of the processing lamella 1 on a larger scale and in the sense of an oversubscription.
  • a hammer nose 7, which is arranged at a distance 8 from a center of rotation Z, and a small holding mass 9, which is arranged at a distance 10 opposite to the hammer nose 7, are clearly expressed in the upper left half of the figure.
  • the hammer nose 7 is over more than twice as far from the center Z as the center of gravity S of the holding mass 9.
  • the recess 2 consists of semi-circular sliding guides lying close to one another, in each case at least approximately. This is the only way to avoid chattering of the processing lamellae which, contrary to the previous opinion, has not improved the work performance.
  • the mass in the area of the holding lug 7 is considerably larger than the holding mass 9 in the opposite area, so that the lamella always strives to remain in its respective sliding guide, due to the unevenly distributed centrifugal forces.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Furan Compounds (AREA)
  • Polarising Elements (AREA)
  • Steroid Compounds (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Road Repair (AREA)

Abstract

The invention proposes a novel machining disc (1) for surface-roughening and surface-cleaning appliances for stone floors, hammer-like machining points (XB, YB, ZB) being formed opposite one semicircular sliding guide (3X, 3Y, 3Z) each. This shape enables an operation of a machining point to bring about a circular movement of the machining disc in the sliding guide and not as before a springing or chattering movement in accordance with a compressed-air hammer. The machining disc is preferably of three-piece design, the recess assuming a shape like a three-leaf clover, and the machining points being turned through about 20 DEG relative to the axes of symmetry (AZ, AX, AY) of the cloverleaf. This shape has proved to be especially effective. <IMAGE>

Description

Die Erfindung betrifft eine Bearbeitungslamelle mit mit den Merkmalen des Oberbegriffes des Patentanspruches 1.The invention relates to a processing lamella with the features of the preamble of claim 1.

Die US-Patentschrift Nr. 1'964'746 zeigt eine solche Vorrichtung der sich bereits seit etlichen Jahrzehnten eigenständig gebildeten Gattung von Stein- Bodenreinigungs-, beziehungsweise Bodenaufrauhmaschinen. Dabei werden zum Beispiel 50 bis 100 Einzellamellen auf einem Rotorkäfigstab eingesetzt. Die Wirksamkeit der Bearbeitungslamellen ist tangentiell, da die Flächenreinigungsgeräte mehrheitlich ebene, stillstehende Flächen gleichmässig bearbeiten müssen. Zu diesem Zweck werden die Bearbeitungslamellen in grosser Zahl relativ dicht aneinander gereiht und direkt auf einem Rotorkäfigstab einzeln gelagert. Der Rotor selbst weist mehrere, in einer Kreisbahn angeordnete Rotorkäfigstäbe auf, damit beim Vorschieben der Bearbeitungsmaschine eine möglichst einheitliche Oberfläche, insbesondere von Stein- und Betonböden entsteht.US Pat. No. 1,964,746 shows such a device of the type of stone, floor cleaning or floor roughening machine that has been formed independently for several decades. For example, 50 to 100 individual fins are used on a rotor cage rod. The effectiveness of the processing slats is tangential, since the surface cleaning devices mostly have to process even, stationary surfaces evenly. For this purpose, the processing lamellae are lined up in relatively large numbers and individually stored directly on a rotor cage rod. The rotor itself has a plurality of rotor cage bars arranged in a circular path so that when the machine tool is advanced, the surface is as uniform as possible, in particular from stone and concrete floors.

In der DE-PS Nr. 576'920 ist eine Spezialausführung einer ähnlichen Gattung zum Einarbeiten von Rillen in Mauern dargestellt. Grundsätzlich werden in beiden Fällen die einzelnen Bearbeitungslamellen fräserartig ausgebildet und haben im Umfang mehrere Meisselköpfe, respektiv Bearbeitungsstellen. Für die Lagerurg der Bearbeitungslamelle weist jede in der Mitte eine Ausnehmung mit einer vorzugsweise polygonalen Form und mehreren exzentrischen Lagerstellen, auf. Dadurch wird erreicht, dass die Bearbeitungslamelle nicht nur bezüglich der Ausnehmung frei rotieren kann, sondern ständig von einer Lagerstelle zur anderen springt. Zweierlei wird dadurch erreicht:

  • Erstens kommt so, statistisch betrachtet, jede Bearbeitungsstelle zu gleich vielen Meisseleinsätzen, was zumindest theoretisch eine gleichmässige Abnützung ergibt.
  • Der zweite Effekt liegt vor allem, wie in der Anmeldung WO 91/04144 ausgeführt wird, die eine Lamelle nach dem Oberbegriff des Anspruchs 1 offenbart, in der Erzielung einer, die rotierende Bewegung hemmende Ratterbewegung.
DE-PS No. 576'920 shows a special version of a similar type for incorporating grooves into walls. In both cases, the individual processing lamellae are basically designed in the manner of a milling cutter and have a number of chisel heads or processing points on the circumference. For the bearing block of the processing lamella, each has a recess in the middle with a preferably polygonal shape and several eccentric bearing points. This ensures that the processing lamella can not only rotate freely with respect to the recess, but also jumps continuously from one bearing point to another. This achieves two things:
  • First of all, statistically speaking, each processing point has the same number of chisel inserts, which at least theoretically results in even wear.
  • The second effect lies, above all, as is stated in the application WO 91/04144, which discloses a lamella according to the preamble of claim 1, in the achievement of a chatter movement which inhibits the rotating movement.

Interessant ist aber die langjährige Erfahrung: Fast mit jeder vernünftigen Form erhält man ähnliche Resultate, so dass die bisherige Entwicklung sich im wesentlichen auf Materialfragen konzentrierte. Die Exzentrizität ergibt sich aus der polygonalen Form der Lagerstellen, in der Ausnehmung einerseits und der gegenüberliegenden Bearbeitungsstelle andererseits und verursacht mit der raschen Umdrehung des Rotorkäfigs die Meisselkraft. Dadurch, dass die Bearbeitungslamelle nach dem Aufschlag sofort in eine andere Auflage springt, vermeidet man eine starke Schlagrückwirkung auf Rotor und Antrieb.However, the many years of experience are interesting: almost every reasonable form gives similar results, so that the development so far mainly focuses on material issues concentrated. The eccentricity results from the polygonal shape of the bearing points, in the recess on the one hand and the opposite machining point on the other and causes the chisel force with the rapid rotation of the rotor cage. The fact that the processing lamella jumps to another support immediately after impact prevents a strong impact on the rotor and drive.

Der Erfindung wurde nun die Aufgabe gestellt, die Nachteile der bekannten Bearbeitungslamellen zu beheben, insbesondere die Flächenaufrauh-, respektiv Flächenreinigungswirkung bei vergleichbaren Voraussetzungen zu erhöhen.The object of the invention was now to remedy the disadvantages of the known machining lamellae, in particular to increase the surface roughening or surface cleaning effect under comparable conditions.

Die erfindungsgemässe Lösung ist dadurch gekennzeichnet, dass die Ausnehmung mehrere halbkreisförmige Gleitführungen aufweist und zwar so, dass in Bezug auf das Zentrum der Ausnehmung, aber entgegengesetzt, je einer Gleitführung, eine hammerartige, exzentrische Bearbeitungsstelle zugeordnet ist. Ueberraschenderweise konnte mit der neuen Erfindung auf Anhieb bis zu 50% mehr Arbeitsleistung erzielt werden, dies insbesondere mit einem spürbar ruhigeren Betrieb. Ein wichtiger Kernansatz liegt dabei in der Zusammenwirkung der erfindungsgemässen geforderten, halbkreisförmigen Gleitführung und der dazu hammerartig ausgebildeten Bearbeitungsstelle. Das gedankliche Modell ist damit nicht mehr der, in rascher Form wirkende Meissel, sondern der endseitig (am Hammerstiel) gelagerte Spitzhammer, etwa in Analogie zu den klassischen Hammermühlen für das Brechen von Steinen.
Durch die halbkreisförmige Lagerung springt die Bearbeitungslamelle nicht schon beim ersten Kontakt, beziehungsweise Aufschlag auf die Bearbeitungsfläche in die nächststehende Führung, noch viel weniger wird eine rotierende Ratterbewegung erzeugt. Die Bearbeitungslamelle bringt die maximale kinetische Energie über die Bearbeitungsstelle in einer stark geführten Kreisbewegung zum Einsatz und erlaubt eine präzise Bearbeitung. Es wird bewusst in Kauf genommen, dass die Bearbeitungslamelle nicht nach jedem Schlag, beziehungsweise Umlauf, die Lagerstelle wechselt. Da der Bearbeitungsvorgang über längere Zeit betrachtet, nicht stetig ist, ergeben sich genügende Lageänderungen in Bezug auf die Gleitführung, so dass sich alle Bearbeitungsstellen gleichmässig abnützen. Sehr wesentlich für den Erfolg ist, die eindeutige Zuordnung der Gleitführungsstelle zur Bearbeitungsstelle.The solution according to the invention is characterized in that the recess has a plurality of semicircular sliding guides and in such a way that a hammer-like, eccentric machining point is assigned to the center of the recess, but in opposite directions, in each case to a sliding guide. Surprisingly, up to 50% more work could be achieved with the new invention, especially with a noticeably quieter operation. An important core approach lies in the interaction of the required semi-circular sliding guide according to the invention and the processing point designed to be hammer-like for this purpose. The conceptual model is therefore no longer the chisel that acts in a quick form, but the one on the end (on the hammer handle) Sharp hammer, roughly analogous to the classic hammer mills for breaking stones.
Due to the semicircular mounting, the processing lamella does not jump into the next guide when it first makes contact or strikes the processing surface, and a rotating chatter movement is generated even less. The processing lamella uses the maximum kinetic energy via the processing point in a strongly guided circular movement and enables precise processing. It is consciously accepted that the processing lamella does not change the bearing point after each stroke or circulation. Since the machining process is not continuous over a long period of time, there are sufficient changes in position with respect to the sliding guide, so that all machining points wear evenly. The clear assignment of the sliding guide point to the processing point is very important for success.

Die Erfindung erlaubt verschiedene, besonders vorteilhafte Ausgestaltungen. In einzelnen Anwendungsfällen hat es sich gezeigt, dass bei einer gewissen Anzahl Umdrehungen pro Minute die Bearbeitungsamellen in einer mittleren Lage drehen und dabei nur noch einen stark reduzierten Bearbeitungseffekt ausüben. Vorzugweise wird deshalb die Bearbeitungsstelle bezüglich der gegenüberliegenden Gleitführungsstelle in Bearbeitungsdrehrichtung versetzt angeordnet. Die Versetzung wird bezüglich einer Achse durch das Zentrum der Ausnehmung und einer halbkreisförmigen Gleitführung vorzugsweise weniger als 30 Winkelgrade, besonders vorzugsweise 10-25 Winkelgrade gewählt. Ein Optimum konnte bei 20 Grad Versetzung gefunden werden. Bevorzugt wird der Abstand des tatsächlichen Drehzentrums der Gleitführung zu dem Zentrum der Ausnehmung im Verhältnis zu dem Abstand von dem Zentrum und einer Bearbeitungsstelle, wenigstens etwa 1 : 3 gewählt.The invention allows various, particularly advantageous configurations. In individual applications, it has been shown that at a certain number of revolutions per minute, the processing lamellae rotate in a middle position and only have a greatly reduced processing effect. The machining point is therefore preferably offset with respect to the opposite sliding guide point in the machining direction of rotation. The transfer is regarding an axis through the center of the recess and a semicircular sliding guide preferably selected less than 30 degrees, particularly preferably 10-25 degrees. An optimum could be found at a 20 degree offset. The distance of the actual center of rotation of the sliding guide to the center of the recess in relation to the distance from the center and a machining point is preferably selected at least about 1: 3.

Eine ganz besonders gute Wirkung ergibt sich, wenn die Bearbeitungslamelle Gleitführungen in ungerader Zahl, vorzugsweise drei mit je einem Drehzentrum, sowie drei Bearbeitungsstellen aufweist. Bei der Wahl von drei Gleitführungen erhalten diese das Aussehen, wie ein drei-blättriges Kleeblatt, wobei die ebenfalls drei Bearbeitungsstellen um 120° versetzt angeordnet werden.
Auf diese Weise liegt jeweils die Haltepartie der Bearbeitungslamelle mit der geringsten Materialkonzentration genau gegenüber der Schlag-Partie mit der grössten Materialkonzentration, wobei die Gleitführungen, je an der "leichten" Seite liegen. Sehr vorteilhaft ist ferner, wenn die Bearbeitungsstellen an einer zahnförmigen, auskragenden Hammernase angebracht sind.
Der Uebergang von einer Gleitführung zu der nächsten wird bevorzugt als gegen das Zentrum der Ausnehmung gerichtete konvexe Rundung und als Verstärkung der Schlagnase ausgebildet.A particularly good effect is obtained if the machining lamella has an odd number of sliding guides, preferably three, each with a turning center, and three machining points. If you choose three sliding guides, they will look like a three-leaf clover, with the three machining points also being offset by 120 °.
In this way, the holding section of the processing lamella with the lowest material concentration lies exactly opposite the striking section with the largest material concentration, the sliding guides being on the "light" side. It is also very advantageous if the processing points are attached to a tooth-shaped, projecting hammer nose.
The transition from one sliding guide to the next is preferably designed as a convex curve directed towards the center of the recess and as a reinforcement of the impact nose.

Es wird ein zu häufiges Ueberspringen von einer Gleitführung zur nächsten vermieden, dagegen von Zeit zu Zeit, ein Ueberrollen von einer Gleitführung zur nächsten erreicht, was besonders zur Beruhigung des Arbeitsablaufes beiträgt.
Die exzentrischen Gleitführungen umschliessen wenigstens einen Winkel von etwa 180° und führen gegen das gedachte Zentrum über einen Abrollschulter zur angrenzenden Gleitführung. Die Gleitführungen weisen vorteilhafterweise bezüglich je einer gedachten Achse: Zentrum Ausnehmung/Drehzentrum eine symmetrische Form auf, wobei bevorzugt je eine Bearbeitungsstelle auf einer Symmetrieachse angeordnet ist.Too often skipping from one slide guide to the next is avoided, but from time to time a rollover from one slide guide to the next is achieved, which contributes particularly to calming down the workflow.
The eccentric sliding guides enclose at least an angle of approximately 180 ° and lead against the imaginary center via a rolling shoulder to the adjacent sliding guide. The sliding guides advantageously have a symmetrical shape with respect to an imaginary axis: center recess / center of rotation, preferably one machining point each being arranged on an axis of symmetry.

Ferner wird vorgeschlagen, die Bearbeitungsstelle auf einer hammerartigen Materialverdickung aufzusetzen, wobei über einen Winkel von etwa 60° vom Zentrum der Ausnehmung aus betrachtet, eine stetig sich verjüngende Form gebildet wird.
Bevorzugt weist die Bearbeitungsstelle eine eingesetzte Hartmetallspitze oder eine Hartmetallplatte auf, welche an einer zahnartig ausgebildeten Materialverdickung angebracht sind, mit einer in Arbeitsrichtung angeordneten, annäherend radialen Zahnflanke.It is also proposed to place the processing point on a hammer-like material thickening, a continuously tapering shape being formed over an angle of approximately 60 ° from the center of the recess.
The processing point preferably has an inserted hard metal tip or a hard metal plate, which are attached to a tooth-like material thickening, with an approximately radial tooth flank arranged in the working direction.

Die Erfindung wird nun mit einigen Ausführungsbeispielen mit weiteren Einzelheiten erläutert. Es zeigen:

Figur 1
eine Bearbeitungslamelle mit Schlagspitze;
Figur 2
eine Bearbeitungslamelle mit Schlagkante;
Figur 3
schematisch den Bewegungsverlauf über einen Bearbeitungsweg;
Figur 4
eine Variante der Bearbeitungslamelle mit eingezeichneten Verhältnisangaben.
The invention will now be explained in more detail with some embodiments. Show it:
Figure 1
a processing blade with a striking tip;
Figure 2
a processing lamella with striking edge;
Figure 3
schematically the course of movement over a processing path;
Figure 4
a variant of the processing lamella with drawn ratio information.

In der Folge wird auf die Figuren 1 und 2 Bezug genommen. Eine Bearbeitungslamelle 1 ist als dreiteilige Form ausgebildet, wobei eine zentrale Ausnehmung 2 die Form eines dreiblättrigen Kleeblattes hat und jedes der drei "Blätter" je eine Gleitführung 3 ist. Die Gleitführung 3 ist mindestens annähernd ein Halbkreis, welcher sich von seinem Drehzentrum betrachtet, über einen Winkel von etwa 180° erstreckt. Die Bearbeitungslamelle 1 wird von einem Rotorkäfigstab 4 gehalten und bewegt sich in der Figur 1 im Uhrzeigersinnn an einem umlaufenden, nicht dargestellten Rotorkäfig. Es wirkt im freien Umlauf hauptsächlich die Zentrifugalkraft Zf, so dass die Bearbeitungsstelle ZB für eine Arbeitseinsatzlage den äussersten peripheren Punkt einnimmt und um ein Zentrum Z der Gleitführung 3Z drehbeweglich gehalten ist.In the following, reference is made to FIGS. 1 and 2. A processing lamella 1 is designed as a three-part shape, a central recess 2 having the shape of a three-leaf clover and each of the three “leaves” being a sliding guide 3. The sliding guide 3 is at least approximately a semicircle, which extends from its center of rotation and extends over an angle of approximately 180 °. The processing lamella 1 is held by a rotor cage rod 4 and moves in a clockwise direction in FIG. 1 on a rotating rotor cage, not shown. The centrifugal force Zf acts mainly in free circulation, so that the processing point ZB occupies the outermost peripheral point for a work position and is held rotatably about a center Z of the sliding guide 3Z.

Die Gleitführungen 3Z,3Y,3X sind je über einen zu den drei Gleitführungen entgegengesetzt gerichteten Radius Ri, welcher nur einen Bruchteil in Bezug auf den Radius R3 jeder Gleitführung 3 ausmacht. Die Bearbeitungslamelle weist drei Bearbeitungsstellen ZB,YB und XB auf, welche bedingt durch die Dreiteiligkeit eine 60° Versetzung zu der nächsten Achse AX, respektiv AZ, respektiv AY haben. Der Durchmesser der Gleitführung 3 ist um ein geringes Spiel grösser als der Durchmesser des Rotorkäfigstabes 4, welcher als lockerer Gleitsitz ausgebildet ist. In der Figur 1 weisen die Bearbeitungsstellen je eine Schlagspitze 5, welche aus einer eingelöteten Hartmetallspitze gebildet ist, auf. Im Stillstand würde in der gezeichneten Lage die Bearbeitungslamelle 1 nach unten gleiten, so dass der Rotorkäfigstab 4 in das Drehzentrum Z verschoben würde.The slide guides 3Z, 3Y, 3X each have a radius Ri which is opposite to the three slide guides and which only makes up a fraction of the radius R3 of each slide guide 3. The processing lamella has three processing points ZB, YB and XB, which, due to the three-part structure, have a 60 ° offset to the next axis AX, respectively AZ, respectively AY. The diameter of the sliding guide 3 is a little more than the diameter of the rotor cage rod 4, which is designed as a loose sliding seat. In FIG. 1, the processing points each have an impact tip 5, which is formed from a soldered hard metal tip. At a standstill, the processing lamella 1 would slide downward in the position shown, so that the rotor cage rod 4 would be moved into the center of rotation Z.

In der Figur 2 ist eine Bearbeitungslamelle dargestellt, die anstelle einer Schlagspitze 5, drei Hartmetallplatten 6 aufweist, welche sich für Reinigungszwecke gut eignen.FIG. 2 shows a processing lamella which, instead of a striking tip 5, has three hard metal plates 6 which are well suited for cleaning purposes.

In der Figur 3 ist ein Bewegungsablauf einer Bearbeitungslamelle in vier zeitlich nacheinander liegenden Positionen dargestellt. In der Stellung A wirkt neben dem Gewicht nur die Zentrifugalkraft. Die Schlagspitze 5 ist die äusserste, periphere Spitze der Bearbeitungslamelle und liegt auf einem Radius, der gleichzeitig durch das Rotationszentrum RZ und durch das Zentrum Z der Gleitführung 3 geht.FIG. 3 shows a sequence of movements of a processing lamella in four successive positions. In position A, only the centrifugal force acts in addition to the weight. The striking tip 5 is the outermost, peripheral tip of the processing lamella and lies on a radius that passes through the center of rotation RZ and through at the same time the center Z of the sliding guide 3 goes.

Beim ersten Kontakt mit dem Fussboden FB, (Situation B) erfährt die Schlagspitze 5 einen Widerstand, so dass die Bearbeitungslamelle 1 beginnt um das Zentrum Z auszulenken, Auslenk-Winkel . Je nach der Grösse des empfangenen Impulses dreht sich die Bearbeitungslamelle nun ein oder mehrmals um das Zentrum der Gleitführung. Die Massenverteilung führt jedoch dazu, dass nach cirka einer Umdrehung wieder die optimale Winkellage erreicht ist.At the first contact with the floor FB, (situation B), the striking tip 5 experiences resistance, so that the processing lamella 1 begins to deflect the center Z, deflection angle. Depending on the size of the pulse received, the processing lamella now rotates one or more times around the center of the sliding guide. However, the mass distribution means that the optimum angular position is reached again after about one revolution.

Selbstverständlich kann die Bearbeitungslamelle, zum Beispiel durch Einwirkung von Unebenheiten und dadurch erzeugten Schlägen oder durch ruckweises Bewegen jede andere Stellung innerhalb der Grenzen der Ausnehmung annehmen. Dies gefährdet nicht die Bearbeitungsqualität, sondern schützt die mechanischen Teile der Maschine vor übermässigen Schlagbeanspruchungen.Of course, the processing lamella can assume any other position within the boundaries of the recess, for example by the action of unevenness and the shocks it produces or by jerky movement. This does not endanger the machining quality, but protects the mechanical parts of the machine against excessive impact loads.

In der Figur 4 sind in grösserem Massstab und im Sinne einer Ueberzeichnung die Kernelemente der Bearbeitungslamelle 1 dargestellt. Es kommt in der linken oberen Bildhälfte deutlich eine Hammernase 7, welche gegenüber einem Drehzentrum Z um einen Abstand 8 angeordnet ist, sowie eine kleine Haltemasse 9, welche um einen Abstand 10, entgegengesetzt zu der Hammernase 7 angeordnet ist, zum Ausdruck. Die Hammernase 7 ist um mehr als das Zweifache weiter weg von dem Zentrum Z, als der Schwerpunkt S der Haltemasse 9.4 shows the core elements of the processing lamella 1 on a larger scale and in the sense of an oversubscription. A hammer nose 7, which is arranged at a distance 8 from a center of rotation Z, and a small holding mass 9, which is arranged at a distance 10 opposite to the hammer nose 7, are clearly expressed in the upper left half of the figure. The hammer nose 7 is over more than twice as far from the center Z as the center of gravity S of the holding mass 9.

Gegenüber in der Formgebung sehr ähnlichen Bearbeitungslamellen, besteht der wesentliche Unterschied, dass die Ausnehmung 2 aus dicht aneinander liegenden, jeweils mindestens annähernd, halbrunden Gleitführungen besteht. Nur so ist ein Rattern der Bearbeitungslamellen vermeidbar, welches entgegen der bisherigen Auffassung keine Verbesserung der Arbeitsleistung erbrachte.
Die Masse im Bereich der Haltenase 7 ist erheblich grösser als die Haltemasse 9 im gegenüberliegenden Bereich, so dass die Lamelle immer das Bestreben hat in ihrer jeweiligen Gleitführung zu verbleiben, bedingt durch die ungleich verteilten Fliehkräfte. Gelangt jedoch der Rotorkäfigstab 4 doch einmal aus einer Führung, so bewirkt die um rund 20° verschobene Anordnung der Hammernase, dass ein Gleichlauf nicht mehr möglich ist, so dass die Lamelle sogleich wieder in eine der Gleitführungen rutscht und die korrekten, optimalen Bearbeitungsverhältnisse sich wieder einstellen.Compared to machining lamellae which are very similar in shape, there is the essential difference that the recess 2 consists of semi-circular sliding guides lying close to one another, in each case at least approximately. This is the only way to avoid chattering of the processing lamellae which, contrary to the previous opinion, has not improved the work performance.
The mass in the area of the holding lug 7 is considerably larger than the holding mass 9 in the opposite area, so that the lamella always strives to remain in its respective sliding guide, due to the unevenly distributed centrifugal forces. However, if the rotor cage rod 4 does get out of a guide, the arrangement of the hammer nose shifted by about 20 ° means that synchronism is no longer possible, so that the lamella immediately slides back into one of the slide guides and the correct, optimal machining conditions are restored to adjust.

Claims (9)

  1. Floating bearing working blade (1) and rotor cage bar (4) of a surface roughening or working device, the blade having at least three circumferentially distributed working points (XB, YB, ZB) and a polygonal recess (2) centrally traversing the working blade (1) and having the same number of bulges as working points and with respect to the centre of the recess with each bulge is associated a hammer-like working point, each bulge at least approximately forming a semicircular sliding guide (3X, 3Y, 3Z) and each working point (XB, YB, ZB) being displaced by an angle with respect to an axis (AX, AY, AZ) through the centre (G) of the working blade and the rotation centre (X, Y, Z) of each semicircular sliding guide (3X, 3Y, 3Z), characterized in that the cage bar (4) is received in bearing manner with limited clearance in each bulge.
  2. Working blade according to claim 1, characterized in that the working point (XB, YB, ZB) is displaced with respect to the axis (AX, AY, AZ) by less than 30 radians, preferably 10 to 25 radians.
  3. Working blade according to claim 1, characterized in that the distance from the actual rotation centre (X, Y, Z) of the sliding guides (3X, 3Y, 3Z) from the centre (G) of the recess (2) relative to the distance from the centre (G) of the recess (2) and a working point (XB, YB, ZB) is at least approximately 1:3.
  4. Working blade according to claim 1, characterized in that it has an uneven number, preferably three sliding guides (3X, 3Y, 3Z).
  5. Working blade according to claim 1, characterized in that the working points (XB, YB, ZB) are fitted to in each case one tooth-like, projecting hammer nose (7).
  6. Working blade according to claim 5, characterized in that the transition from one sliding guide (3X, 3Y, 3Z) to the next is constructed as a convex rounding (Ri) directed against the centre (G) of the recess (2) and as a reinforcement of the hammer nose (7).
  7. Working blade according to claim 5, characterized in that each hammer nose (7) has a percussion tool (5, 6).
  8. Working blade according to claim 7, characterized in that the percussion tool is formed by an interposed carbide tip (5) or carbide plate (6).
  9. Working blade according to claim 5, characterized in that the hammer nose (7) has a tooth-like construction with an approximately radially directed tooth profile located in the operating direction.
EP93810006A 1992-02-10 1993-01-08 Machining disc Expired - Lifetime EP0556149B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CH393/92 1992-02-10
CH39392 1992-02-10
CH1973/92 1992-06-23
CH197392A CH683507A5 (en) 1992-06-23 1992-06-23 Machining disc for surface roughening and cleaning of stone surfaces

Publications (2)

Publication Number Publication Date
EP0556149A1 EP0556149A1 (en) 1993-08-18
EP0556149B1 true EP0556149B1 (en) 1997-03-12

Family

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Application Number Title Priority Date Filing Date
EP93810006A Expired - Lifetime EP0556149B1 (en) 1992-02-10 1993-01-08 Machining disc

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US (1) US5335976A (en)
EP (1) EP0556149B1 (en)
AT (1) ATE149908T1 (en)
DE (1) DE59305678D1 (en)
ES (1) ES2098708T3 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6308700B1 (en) * 1999-10-25 2001-10-30 Dr Kaiser Co. Process and manufacturing of a rotary diamond dresser for trueing and dressing of industrial grinding wheels
GB2361204B (en) * 2000-03-13 2003-12-03 John Elliott Burgess An attachment for a percussive tool
CH696975A5 (en) * 2001-10-03 2008-02-29 Airtec Ag Milling wheels to a bottom milling.

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE576920C (en) * 1929-10-22 1933-05-22 Ludwig Hammer Chisel machine
US1964746A (en) * 1932-06-09 1934-07-03 Francis P Sloan Floor roughing machine
DE622110C (en) * 1933-06-21 1935-11-19 Eugen Heimbucher Motoren Und Z Device for working grooves, grooves or the like in walls, walls or stones
JP2640662B2 (en) * 1988-01-26 1997-08-13 株式会社ライナックス Impact-type cutting machine cutter
WO1991004144A1 (en) * 1989-09-20 1991-04-04 Von Arx Ag Maschinenfabrik Machining blade for a rotor of a surface roughening device

Also Published As

Publication number Publication date
US5335976A (en) 1994-08-09
EP0556149A1 (en) 1993-08-18
ATE149908T1 (en) 1997-03-15
ES2098708T3 (en) 1997-05-01
DE59305678D1 (en) 1997-04-17

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