WO2002055260A1 - Centreless grinder comprising a fixed dressing unit and a method for operating said grinder - Google Patents

Centreless grinder comprising a fixed dressing unit and a method for operating said grinder Download PDF

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Publication number
WO2002055260A1
WO2002055260A1 PCT/DE2001/004487 DE0104487W WO02055260A1 WO 2002055260 A1 WO2002055260 A1 WO 2002055260A1 DE 0104487 W DE0104487 W DE 0104487W WO 02055260 A1 WO02055260 A1 WO 02055260A1
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Prior art keywords
grinding
grinding wheel
dressing unit
workpiece
grinder
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PCT/DE2001/004487
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German (de)
French (fr)
Inventor
Wilhelm Klopmeier
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Sms Eumuco Gmbh
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Publication of WO2002055260A1 publication Critical patent/WO2002055260A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/18—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centreless means for supporting, guiding, floating or rotating work
    • B24B5/22—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centreless means for supporting, guiding, floating or rotating work for grinding cylindrical surfaces, e.g. on bolts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/36—Single-purpose machines or devices
    • B24B5/38—Single-purpose machines or devices for externally grinding travelling elongated stock, e.g. wire
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
    • B24B53/02—Devices or means for dressing or conditioning abrasive surfaces of plane surfaces on abrasive tools

Definitions

  • the invention relates to a method for operating a centerless grinding machine and a centerless grinding machine for continuous grinding of elongate workpieces such as bars and tubes, comprising a grinding unit with at least one against the conveyed, in the machine housing of rollers or feed discs and / or rulers or strips supported workpiece adjustable, driven grinding wheel and a dressing unit assigned to the grinding wheel.
  • the machine arrangements which are mainly used for centerless through-grinding are based on the one hand on feed gears and opposite grinding wheels or on a grinding wheel with rod guide and feed drive via a regulating wheel.
  • the grinding gap and the "sharpness" of the grinding machine change with the machining time due to wear of the grinding wheel, i.e. Geometry (diameter) and engagement conditions (surface) change with the machining time.
  • the process must be continuously monitored and corrected. The oscillation between the intervention limits and the measurement and control deviations worsen the process reliability.
  • the invention has for its object to provide a method for operating a centerless grinding machine and a centerless grinding machine that allow constant cutting conditions with simple means throughout the life of the grinding wheel.
  • This object is achieved according to a method in that the grinding wheel is moved against a stationary dressing unit during the grinding and is permanently forcibly dressed. With continuous feeding of the grinding wheel, dressing takes place before each contact with the cutting edge, the contact point of the wheel and workpiece remaining stationary. No time is wasted on dressing and, in particular, no reset is required during delivery.
  • the constant cutting conditions achieved support the uniformity of diameter, surface quality and the dynamic properties.
  • the stationary dressing unit preferably a dressing roller, creates the conditions for fixed, unchangeable operating sizes. The only condition is that the (constant) infeed of the grinding wheel is chosen to be slightly larger than the wear of the wheel solely by the machining process.
  • a preferred embodiment of the invention provides that for adjusting the diameter of the workpiece to be machined, the grinding wheel and the dressing unit are fed together and in grinding operation alone the grinding wheel is fed against the workpiece and the dressing unit.
  • the feed for the thus precise diameter adjustment can be done by a drive derive via a suitable gear with constant gear ratio.
  • An alternative is to connect two separate drives in position control using a suitable computing algorithm or to implement this dependency using a coupling gear. The fact that the grinding wheel is fed in alone during grinding operation enables the position of the working plane to be kept constant regardless of the infeed accuracy.
  • the grinding wheel is opposite a dressing unit which is permanently stationary at least during grinding operation.
  • This stationary arrangement of the dressing unit during the duration of the grinding operation creates the desired constant cutting conditions on the basis of the precisely predeterminable assignment achieved thereby. This is irrespective of whether the grinding wheel is fed continuously or at intervals, but always in such a way that the effective infeed amount is slightly larger than the wear of the grinding wheel.
  • the compulsory dressing associated with each type of infeed independently according to the invention leads to a constant diameter and constant cutting conditions because of the invariable point of contact between the disk and the workpiece.
  • a dressing wheel designed as a cup wheel is assigned the dressing unit with active intervention on the inactive grinding wheel end face, which is distant from the point of contact between the grinding wheel and the workpiece.
  • the grinding wheel or the removal on the workpiece and the dressing unit are always in the same working position. It is within the scope of the possibilities to tilt the grinding wheel axis or to move it perpendicular to the workpiece axis in order to vary the engagement conditions, such as for setting different grinding gap geometries, e.g. for roughing or for roughing / finishing with a pronounced firing zone.
  • Figure 1 as a detail of a centerless grinding machine known as such, a basic arrangement of grinding wheel, dressing device and workpiece with guide.
  • FIG. 2 shows a principle arrangement corresponding to the representation according to FIG. 1, with a grinding wheel that has a wear.
  • a machined workpiece or rod 1 is arranged in a suitable support in a suitable support, a grinding wheel 3, which is designed as a cup wheel and can be delivered in the feed direction 2.
  • the guides receiving the workpiece 1 below the working plane consist of guide disks 4 and a ruler 5.
  • the new, unused grinding disk 3 according to FIG. 1 causes the removal with its active end face 6 at the point of contact 7 with the workpiece 1.
  • the inactive, i.e. A grinding wheel end face 8 currently removed from the workpiece 1 is assigned a dressing unit 9, which is set in a stationary manner during the grinding operation, in the form of a dressing roller.
  • FIG. 2 shows the grinding wheel 3 with considerable wear compared to the starting position (cf. FIG. 1).
  • the grinding wheel 3 was previously delivered in accordance with this wear in the infeed direction 2 against the workpiece 1 and the stationary dressing unit 9 and, along with the respective infeed path, was forcibly and permanently dressed and thus in a continuous operation.
  • the position of the working level remains constant.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)

Abstract

The invention relates to a method for operating a centreless grinder for the throughfeed grinding of longitudinal workpieces (1), such as bars and pipes. Said grinder comprises a grinding unit with at least one driven grinding disc (3), which can be set against a workpiece that is fed through said grinder and that is supported in the grinder housing by rollers (4) or infeed pulleys and/or guides or rails (5) and a dressing unit (9) allocated to the grinding disc. During the grinding process, the grinding disc (3) is set against a fixed dressing unit (9) and is continuously dressed by force. To achieve this, a dressing unit, which is fixed at least throughout the grinding process (9), is located opposite the grinding disc of a centreless grinder in the setting direction (2).

Description

SPITZENLOS-SCHLEIFMASCHINE MIT ORTFESTE ABRICHTEINHEIT UND VERFAHREN CENTERLESS GRINDING MACHINE WITH FIXED DRESSING UNIT AND PROCESS
ZUM BETREIBEN DER MASCHINETO OPERATE THE MACHINE
Die Erfindung betrifft ein Verfahren zum Betreiben einer Spitzenlos-Schleifmaschine sowie eine Spitzenlos-Schleifmaschine zum Durchgangsschleifen von länglichen Werkstücken wie Stäben und Rohren, umfassend eine Schleifeinheit mit zumindest einer gegen das durchgeförderte, im Maschinengehäuse von Rollen bzw. Vorschubscheiben und/oder Linealen bzw. Leisten gestützten Werkstück anstellbaren, angetriebenen Schleifscheibe und eine der Schleifscheibe zugeordnete Abrichteinheit.The invention relates to a method for operating a centerless grinding machine and a centerless grinding machine for continuous grinding of elongate workpieces such as bars and tubes, comprising a grinding unit with at least one against the conveyed, in the machine housing of rollers or feed discs and / or rulers or strips supported workpiece adjustable, driven grinding wheel and a dressing unit assigned to the grinding wheel.
Die zum spitzenlosen Durchgangsschleifen in der Hauptsache gebräuchlichen Maschinenanordnungen (vgl. z.B. DE 296 11 638 U1 , DE 33 08 586 C2) basieren zum einen auf Vorschubgetriebe und gegenüberliegenden Schleifscheiben bzw. auf einer Schleifscheibe mit Stabführung und Vorschubantrieb über eine Regelscheibe. In jedem Fall ändert sich der Schleifspalt und die "Schärfe" der Schleifmaschine mit der Bearbeitungszeit durch Verschleiß der Schleifscheibe, d.h. Geometrie (Durchmesser) und Eingriffsbedingungen (Oberfläche) ändern sich mit der Bearbeitungszeit. Der Prozeß muß dauernd überwacht und korrigiert werden. Das Pendeln zwischen den Eingriffsgrenzen und die Meß- und Regelabweichungen verschlechtern die Prozeßsicherheit.The machine arrangements which are mainly used for centerless through-grinding (see e.g. DE 296 11 638 U1, DE 33 08 586 C2) are based on the one hand on feed gears and opposite grinding wheels or on a grinding wheel with rod guide and feed drive via a regulating wheel. In any case, the grinding gap and the "sharpness" of the grinding machine change with the machining time due to wear of the grinding wheel, i.e. Geometry (diameter) and engagement conditions (surface) change with the machining time. The process must be continuously monitored and corrected. The oscillation between the intervention limits and the measurement and control deviations worsen the process reliability.
Beim spitzenlosen Rundschleifen tritt weiterhin das Problem auf, daß durch die verhältnismäßig großen Schnittkräfte zwischen Schleifscheibe und Werkstück das Maschinengestell elastisch verformt wird. Um die erforderliche Maßgenauigkeit zu erreichen, wird daher nach Beendigung der Zustellbewegung der Schleifscheibe der Schleifvorgang noch so lange fortgesetzt, bis sich die Maschine entspannt hat und die Schnittkräfte weitgehend abgebaut sind. Dieser auch unter dem Begriff "Ausfeuern" bekannte Vorgang verlängert die Bearbeitungszeit erheblich, da sich mit abnehmender Schnittkraft der Materialabtrag verringert.With centerless cylindrical grinding, the problem also arises that the machine frame is elastically deformed by the relatively large cutting forces between the grinding wheel and the workpiece. In order to achieve the required dimensional accuracy, the grinding process is continued after the feed movement of the grinding wheel has ended until the machine has relaxed and the cutting forces have largely been reduced. This process, also known as "firing", extends the machining time considerably, since the material removal decreases with decreasing cutting force.
Durch die DE 40 02 632 C2 ist es daher bekannt geworden, beim Betrieb einer Spitzenlos-Rundschleifmaschine die Zustellbewegung in zwei oder mehr Zustellstufen mit unterschiedlicher Zustellgeschwindigkeit zu unterteilen und zwischen den Zustellstufen Pausen vorzusehen, in denen die Zustellung ruht oder eine negative Zustellung erfolgt. Hierbei wird die Zustellbewegung in der ersten und/oder weiteren Stufe bzw. Stufen, mit Ausnahme der letzten Stufe, um das Maß der elastischen Verformung der Rundschleifmaschine und/oder des Werkstückes vergrößert. Außerdem wird während zumindest eines Teils der Zustellung ein Abrichtvorgang ausgeführt. Die Schleifscheibe wird zu diesem Zweck in einer Zustellstufe bis zu einem bestimmten Punkt zurückgesetzt und dabei gleichzeitig abgerichtet.From DE 40 02 632 C2 it is therefore known that the feed movement in two or more when operating a centerless cylindrical grinding machine To subdivide delivery stages with different delivery speeds and to provide breaks between delivery stages in which delivery stops or a negative delivery takes place. The infeed movement in the first and / or further stage or stages, with the exception of the last stage, is increased by the amount of elastic deformation of the cylindrical grinding machine and / or the workpiece. In addition, a dressing process is carried out during at least part of the delivery. For this purpose, the grinding wheel is reset in a feed step to a certain point and simultaneously dressed.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zum Betreiben einer Spitzenlos-Schleifmaschine und eine Spitzenlos-Schleifmaschine zu schaffen, die mit einfachen Mitteln während der gesamten Standzeit der Schleifscheibe konstante Schnittbedingungen ermöglichen.The invention has for its object to provide a method for operating a centerless grinding machine and a centerless grinding machine that allow constant cutting conditions with simple means throughout the life of the grinding wheel.
Diese Aufgabe wird gemäß einem Verfahren dadurch gelöst, daß während des Schleifens die Schleifscheibe gegen eine ortsfeste Abrichteinheit zugestellt und permanent zwangsweise abgerichtet wird. Beim kontinuierlichen Zustellen der Schleifscheibe findet somit vor jedem Schneidenkontakt ein Abrichten statt, wobei der Berührpunkt von Scheibe und Werkstück ortsfest bleibt. Zum Abrichten geht keinerlei Zeit verloren, und insbesondere ist auch kein Zurücksetzen während der Zustellung erforderlich. Die erzielten konstanten Schnittbedingungen unterstützen die Gleichhaltung von Durchmesser, Oberflächenbeschaffenheit und der dynamischen Eigenschaften. Die ortsfeste Abrichteinheit, vorzugsweise eine Abrichtrolle, schafft die Voraussetzung für festliegende, unveränderliche Betriebsgrößen. Die einzige Bedingung ist, daß die (konstante) Zustellung der Schleifscheibe geringfügig größer gewählt ist als der Verschleiß der Scheibe allein durch den Bearbeitungsprozeß.This object is achieved according to a method in that the grinding wheel is moved against a stationary dressing unit during the grinding and is permanently forcibly dressed. With continuous feeding of the grinding wheel, dressing takes place before each contact with the cutting edge, the contact point of the wheel and workpiece remaining stationary. No time is wasted on dressing and, in particular, no reset is required during delivery. The constant cutting conditions achieved support the uniformity of diameter, surface quality and the dynamic properties. The stationary dressing unit, preferably a dressing roller, creates the conditions for fixed, unchangeable operating sizes. The only condition is that the (constant) infeed of the grinding wheel is chosen to be slightly larger than the wear of the wheel solely by the machining process.
Eine bevorzugte Ausführung der Erfindung sieht vor, daß zur Einstellung auf den Durchmesser des zu bearbeitenden Werkstückes die Schleifscheibe und die Abrichteinheit gemeinsam zugestellt werden und im Schleifbetrieb allein die Schleifscheibe gegen das Werkstück und die Abrichteinheit zugestellt wird. Der Vorschub für die somit präzise Durchmessereinstellung läßt sich von einem Antrieb über ein geeignetes Getriebe mit konstantem Übersetzungsverhältnis ableiten. Eine Alternative besteht darin, zwei getrennte Antriebe in Lageregelung über einen geeigneten Rechenalgorithmus zu verbinden oder diese Abhängigkeit durch ein Koppelgetriebe zu verwirklichen. Das während des Schleifbetriebes alleinige Zustellen der Schleifscheibe ermöglicht es, die Lage der Arbeitsebene unabhängig von der Zustellgenauigkeit konstant zu halten.A preferred embodiment of the invention provides that for adjusting the diameter of the workpiece to be machined, the grinding wheel and the dressing unit are fed together and in grinding operation alone the grinding wheel is fed against the workpiece and the dressing unit. The feed for the thus precise diameter adjustment can be done by a drive derive via a suitable gear with constant gear ratio. An alternative is to connect two separate drives in position control using a suitable computing algorithm or to implement this dependency using a coupling gear. The fact that the grinding wheel is fed in alone during grinding operation enables the position of the working plane to be kept constant regardless of the infeed accuracy.
Bei einer Spitzenlos-Schleifmaschine zur Durchführung des Verfahrens ist erfindungsgemäß vorgesehen, daß der Schleifscheibe in Zustellrichtung eine zumindest während des Schleifenbetriebes dauerhaft ortsfeste Abrichteinheit gegenüberliegt. Diese während der Dauer des Schleifbetriebes ortsfeste Anordnung der Abrichteinheit schafft aufgrund der damit erreichten, exakt vorherbestimmbaren Zuordnung die angestrebten konstanten Schnittbedingungen. Dies unabhängig davon, ob die Schleifscheibe kontinuierlich oder in Intervallen, aber stets so zugestellt wird, daß der effektive Zustellbetrag etwas größer ist als der Verschleiß der Schleifscheibe. Das bei jeder Art von Zustellung erfindungsgemäß unabhängig damit einhergehende zwangsweise Abrichten führt wegen des unveränderlichen Berührungspunktes von Scheibe und Werkstück zu einem konstanten Durchmesser und konstanten Schnittbedingungen.In the case of a centerless grinding machine for carrying out the method, it is provided according to the invention that the grinding wheel is opposite a dressing unit which is permanently stationary at least during grinding operation. This stationary arrangement of the dressing unit during the duration of the grinding operation creates the desired constant cutting conditions on the basis of the precisely predeterminable assignment achieved thereby. This is irrespective of whether the grinding wheel is fed continuously or at intervals, but always in such a way that the effective infeed amount is slightly larger than the wear of the grinding wheel. The compulsory dressing associated with each type of infeed independently according to the invention leads to a constant diameter and constant cutting conditions because of the invariable point of contact between the disk and the workpiece.
Nach einer bevorzugten Ausführung der Erfindung ist einer als Topfscheibe ausgebildeten Schleifscheibe die Abrichteinheit mit Wirkeingriff an jeweils der vom Berührpunkt von Schleifscheibe und Werkstück entfernten, inaktiven Schleifscheiben-Stirnfläche zugeordnet. Die Schleifscheibe bzw. der Abtrag am Werkstück und die Abrichteinheit befinden sich stets in der gleichen Arbeitslage. Hierbei liegt es im Rahmen der Möglichkeiten, zur Variation der Eingreifbedingungen die Schleifscheibenachse schräg zu stellen bzw. senkrecht zur Werkstückachse zu verschieben, wie zum Einstellen unterschiedlicher Schleifspaltgeometrien, z.B. zum Schruppen oder zum Schruppen/Schlichten mit ausgeprägter Ausfeuerzone. Die Anpassung der Schleifspaltgeometrie durch Lageänderung der Schleifscheibe ist ein wichtiger Effekt der gewählten Anordnung der Abrichteinheit und ermöglicht es, nahezu ideale Schleifgeometrien für den Schrupp- und Schlichtbetrieb einzustellen sowie während der Bearbeitung konstant zu halten. Weitere Einzelheiten und Merkmale der Erfindung ergeben sich aus den Ansprüchen und der nachfolgenden Beschreibung eines in den Zeichnungen sehr schematisch dargestellten Ausführungsbeispiels der Erfindung. Es zeigen:According to a preferred embodiment of the invention, a dressing wheel designed as a cup wheel is assigned the dressing unit with active intervention on the inactive grinding wheel end face, which is distant from the point of contact between the grinding wheel and the workpiece. The grinding wheel or the removal on the workpiece and the dressing unit are always in the same working position. It is within the scope of the possibilities to tilt the grinding wheel axis or to move it perpendicular to the workpiece axis in order to vary the engagement conditions, such as for setting different grinding gap geometries, e.g. for roughing or for roughing / finishing with a pronounced firing zone. The adjustment of the grinding gap geometry by changing the position of the grinding wheel is an important effect of the selected arrangement of the dressing unit and enables almost ideal grinding geometries to be set for roughing and finishing operations and to be kept constant during machining. Further details and features of the invention result from the claims and the following description of an embodiment of the invention shown very schematically in the drawings. Show it:
Fig. 1 als Einzelheit einer als solche hinlänglich bekannten Spitzenlos- Schleifmaschine eine prinzipielle Anordnung von Schleifscheibe, Abrichtvorrichtung und Werkstück mit Führung; undFigure 1 as a detail of a centerless grinding machine known as such, a basic arrangement of grinding wheel, dressing device and workpiece with guide. and
Fig. 2 eine der Darstellung gemäß Fig. 1 entsprechende Prinzip-Anordnung mit demgegenüber einen Verschleiß aufweisenden Schleifscheibe.FIG. 2 shows a principle arrangement corresponding to the representation according to FIG. 1, with a grinding wheel that has a wear.
In einem Maschinengehäuse einer nicht dargestellten Spitzenlos-Schleifmaschine ist zum Bearbeiten eine durchgeförderten Werkstückes bzw. Stabes 1 in einem geeigneten Support eine in Zustellrichtung 2 zustellbare, als Topfscheibe ausgeführte Schleifscheibe 3 angeordnet. Die das Werkstück 1 unterhalb der Arbeitsebene aufnehmenden Führungen bestehen aus Führungsscheiben 4 und einem Lineal 5. Die gemäß Fig. 1 neue, unverbrauchte Schleifscheibe 3 bewirkt mit ihrer aktiven Stirnfläche 6 an jeweils den Berührungspunkt 7 mit dem Werkstück 1 den Abtrag. Der jeweils inaktiven, d.h. momentan vom Werkstück 1 entfernten Schleifscheiben-Stirnfläche 8 ist eine während des Schleifbetriebes ortsfest eingestellte Abrichteinheit 9 in Form einer Abrichtrolle zugeordnet.In a machine housing of a centerless grinding machine, not shown, a machined workpiece or rod 1 is arranged in a suitable support in a suitable support, a grinding wheel 3, which is designed as a cup wheel and can be delivered in the feed direction 2. The guides receiving the workpiece 1 below the working plane consist of guide disks 4 and a ruler 5. The new, unused grinding disk 3 according to FIG. 1 causes the removal with its active end face 6 at the point of contact 7 with the workpiece 1. The inactive, i.e. A grinding wheel end face 8 currently removed from the workpiece 1 is assigned a dressing unit 9, which is set in a stationary manner during the grinding operation, in the form of a dressing roller.
Die Betriebsposition gemäß Fig. 2 zeigt die Schleifscheibe 3 mit gegenüber der Ausgangsposition (vgl. Fig. 1) schon erheblichem Verschleiß. Die Schleifscheibe 3 wurde zuvor entsprechend diesem Verschleiß in Zustellrichtung 2 gegen das Werkstück 1 und die ortsfeste Abrichteinheit 9 zugestellt und einhergehend mit dem jeweiligen Zustellweg zwangsweise permanent und somit in einem kontinuierlichen Arbeitsgang abgerichtet. Die Lage der Arbeitsebene bleibt hierbei konstant. 2 shows the grinding wheel 3 with considerable wear compared to the starting position (cf. FIG. 1). The grinding wheel 3 was previously delivered in accordance with this wear in the infeed direction 2 against the workpiece 1 and the stationary dressing unit 9 and, along with the respective infeed path, was forcibly and permanently dressed and thus in a continuous operation. The position of the working level remains constant.

Claims

Patentansprüche: claims:
1. Verfahren zum Betreiben einer Spitzenlos-Schleifmaschine zum Durchgangsschleifen von länglichen Werkstücken wie Stäben und Rohren, umfassend eine Schleifeinheit mit zumindest einer gegen das durchgeförderte, im Maschinengehäuse von Rollen, Vorschubscheiben und/oder Linealen oder Leisten gestützten Werkstück anstellbaren, angetriebenen Schleifscheibe und eine der Schleifscheibe zugeordnete Abrichteinheit, dadurch gekennzeichnet, daß während des Schleifens die Schleifscheibe (3) gegen eine ortsfeste1. A method for operating a centerless grinding machine for the through grinding of elongated workpieces such as bars and tubes, comprising a grinding unit with at least one driven grinding wheel that can be positioned against the conveyed workpiece that is supported in the machine housing by rollers, feed disks and / or rulers or strips, and one of the Dressing unit assigned to the grinding wheel, characterized in that during grinding the grinding wheel (3) bears against a stationary one
Abrichteinheit (9) zugestellt und permanent zwangsweise abgerichtet wird.Dressing unit (9) is delivered and permanently forcibly dressed.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß zur Einstellung auf den Durchmesser des zu bearbeitenden Werkstückes (1) die Schleifscheibe (3) und die Abrichteinheit (9) gemeinsam zugestellt werden und im Schleifbetrieb die Schleifscheibe (3) gegen das Werkstück (1) und die Abrichteinheit (9) zugestellt wird.2. The method according to claim 1, characterized in that for adjusting to the diameter of the workpiece to be machined (1), the grinding wheel (3) and the dressing unit (9) are delivered together and in grinding operation, the grinding wheel (3) against the workpiece (1st ) and the dressing unit (9) is delivered.
3. Spitzenlos-Schleifmaschine zum Durchgangsschleifen von länglichen Werkstücken wie Stäben und Rohren, umfassend eine Schleifeinheit mit zumindest einer gegen das durchgeförderte, im Maschinengehäuse von Rolle, Vorschubscheiben und/oder Linealen oder Leisten gestützten Werkstück anstellbaren, angetriebenen Schleifscheibe und eine der Schleifscheibe zugeordnete Abrichteinheit, zum Durchführen des Verfahrens nach Anspruch3. Centerless grinding machine for through-grinding of elongated workpieces such as bars and tubes, comprising a grinding unit with at least one driven grinding wheel that can be set against the conveyed workpiece supported by the roller, feed disks and / or rulers or strips in the machine housing, and a dressing unit assigned to the grinding wheel, for performing the method according to claim
1, dadurch gekennzeichnet, daß der Schleifscheibe (3) in Zustellrichtung (2) eine zumindest während des Schleifbetriebes dauerhaft ortsfeste Abrichteinheit (9) gegenüberliegt und die Abrichteinheit (9) während des Schleifens permanent in Eingriff mit der Schleifscheibe (3) steht. Schleifmaschine nach Anspruch 3, gekennzeichnet durch eine als Topfscheibe ausgebildete Schleifscheibe (3), der die Abrichteinheit (9) mit Wirkeingriff an jeweils der vom Berührpunkt (7) von Schleifscheibe (3) und Werkstück (1) entfernten, inaktiven Schleifscheiben-Stirnfläche (8) zugeordnet ist. 1, characterized in that the grinding wheel (3) in the infeed direction (2) is opposite a dressing unit (9) which is permanently stationary at least during the grinding operation and the dressing unit (9) is permanently in engagement with the grinding wheel (3) during grinding. Grinding machine according to claim 3, characterized by a grinding wheel (3) designed as a cup wheel, which provides the dressing unit (9) with active intervention on the inactive grinding wheel end face (8) which is distant from the contact point (7) of the grinding wheel (3) and the workpiece (1) ) assigned.
PCT/DE2001/004487 2001-01-11 2001-11-29 Centreless grinder comprising a fixed dressing unit and a method for operating said grinder WO2002055260A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10100870.8 2001-01-11
DE2001100870 DE10100870C1 (en) 2001-01-11 2001-01-11 Headless grinding machine operating process involves setting grindstone against fixed correcting unit so that it is constantly forcibly corrected

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DE10202347A1 (en) * 2002-01-23 2003-07-24 Evertz Egon Kg Gmbh & Co Cup grinder wheel has rotary axis and slope with cup grinder arm and part-circuit

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