EP4100205A1 - Method and device for cylindrical grinding - Google Patents

Method and device for cylindrical grinding

Info

Publication number
EP4100205A1
EP4100205A1 EP21749084.6A EP21749084A EP4100205A1 EP 4100205 A1 EP4100205 A1 EP 4100205A1 EP 21749084 A EP21749084 A EP 21749084A EP 4100205 A1 EP4100205 A1 EP 4100205A1
Authority
EP
European Patent Office
Prior art keywords
grinding
grinding wheel
workpiece
distance
wheel
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.)
Pending
Application number
EP21749084.6A
Other languages
German (de)
French (fr)
Inventor
Ralf Evertz
Jean-Louis Maurice
Gilles Schwirtz
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.)
Egon Evertz KG GmbH and Co
Original Assignee
Egon Evertz KG GmbH and Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Egon Evertz KG GmbH and Co filed Critical Egon Evertz KG GmbH and Co
Publication of EP4100205A1 publication Critical patent/EP4100205A1/en
Pending legal-status Critical Current

Links

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
    • B24B27/00—Other grinding machines or devices
    • B24B27/0076—Other grinding machines or devices grinding machines comprising two or more grinding tools
    • 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
    • B24B5/02—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work
    • B24B5/04—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding cylindrical surfaces externally
    • 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
    • B24B51/00—Arrangements for automatic control of a series of individual steps in grinding a workpiece

Definitions

  • the invention relates to a method for cylindrical grinding of cylindrical workpieces on a grinding machine, in which the axes of rotation of a grinding wheel and the workpiece are aligned parallel to one another and the grinding wheel is moved during grinding relative to the workpiece in the longitudinal axial direction of the workpiece.
  • Grinding is suitable for manufacturing parts with tightly toleranced dimensions that cannot be produced by turning or milling.
  • the advantages of grinding are, in particular, good machinability of hard materials, high dimensional and shape accuracy as well as small waviness and roughness.
  • the rotating grinding wheels have grinding grains whose position in the grinding wheel is undefined for each grain, so that grinding is referred to as cutting with geometrically undefined cutting edges.
  • cutting With external cylindrical longitudinal grinding, the workpiece is guided along the grinding wheel via the longitudinal feed of a workpiece slide.
  • Another variant is the so-called centerless cylindrical grinding, in which the round, cylindrical workpieces are pressed against the grinding wheel by a regulating wheel when being processed with a grinding wheel.
  • the grinding wheels used for longitudinal grinding often leave a helical error line on the workpiece, which depends on the feed.
  • a second grinding wheel follows the first grinding wheel at a constant distance, the distance being determined by the width of the first grinding wheel and the other grinding parameters such as the rotational speeds of the first grinding wheel and the workpiece and the feed in the longitudinal axial direction is determined in such a way that the second grinding wheel grinds the helical fault lines which the first grinding wheel has produced during grinding.
  • a second grinding wheel eliminates the surface defects in the workpiece that occur in a helical form.
  • the shape, arrangement or drive of the second grinding wheel can be selected as desired, as long as it is ensured that the said helical boundary line on the workpiece surface is reworked.
  • the grinding wheels can have abrasive grains with the same or different granulometry.
  • the first and second grinding wheels are mounted on the same axis of rotation and are driven at the same rotational speed during grinding. This has the advantage that only one drive needs to be used.
  • the grinding method according to the invention can be used for counter-rotating or co-rotating grinding wheels and workpieces, a co-rotating grinding wheel and workpiece provided that different rotational speeds are selected so that a relative movement between the grinding wheel and the workpiece can be set.
  • the grinding device described in claim 5 is used, which is characterized by a second grinding wheel, the distance to the first Grinding wheel is rotatably arranged. Both grinding wheels preferably have a common variable or controllable drive and/or are arranged on the same axis.
  • the distance between the first grinding wheel and the second grinding wheel can be adjusted.
  • a control device is provided that adjusts the distance between the first and second grinding wheel in such a way that the second grinding wheel sweeps over the helical error lines during grinding, which the first grinding wheel previously produced.
  • FIG. 2 shows a basic sketch of the grinding device according to the invention with a first and second grinding wheel.
  • helical error lines can arise during external cylindrical longitudinal grinding, which can be caused, for example, by non-parallel guidance of the surface line of the grinding wheel to the longitudinal slide movement or thermal influences or wear of the abrasion tool (for the grinding wheel).
  • the grinding wheel 12 leaves such helical grinding marks whose pitch is determined by the feed of the grinding wheel relative to the workpiece 10 shown by the arrow 13 .
  • the cylindrical workpiece 10 rests on rollers 14, 15, which are preferably in equally spaced serve as support and drive rollers for the rotary movement of the workpiece.
  • Fig. 1b and 1c show different drive options:
  • the drive rollers 14, 15, on which the cylindrical workpiece rests are rotated in the opposite direction to the direction of rotation of the grinding wheel 12.
  • the grinding wheel 12 and the cylindrical workpiece 10 move in the same direction of rotation, which is why the rotational speeds of the cylindrical workpiece 10 and the grinding wheel must be different for grinding.
  • the drive rollers 14, 15 drive the workpiece in a direction which is opposite to the direction of rotation of the grinding wheel 12.
  • a second grinding wheel 16 is used, which in the present case has the same diameter as the first grinding wheel 12 and which is mounted on the same axis of rotation.
  • the grinding wheels 12 and 16 experience the same rotational speed due to a common drive (not shown).
  • the distance between the first grinding wheel 12 and the second grinding wheel 16, which can be variably adjusted via a control device (not shown), depends on the spiral or helical course of the surface defects on the workpiece 10.
  • the second grinding wheel follows this helical line of defects and eliminates the surface defects.
  • the method according to the invention is suitable for all external cylindrical or internal cylindrical grinding processes, regardless of the dimensions of the workpiece and the material of which the workpiece is made.
  • post-processing of the workpiece surface can also be achieved in the simplest way with the method according to the invention.
  • the first and the second grinding wheel can be fixed so that the workpiece feed is generated by a linear movement of the cylindrical workpiece 10 .
  • the tandem grinding wheel pair consisting of the first and second grinding wheel can also be moved longitudinally and axially to the workpiece.

Abstract

The invention relates to a method for cylindrical grinding of cylindrical workpieces on a grinding machine, in which the axes of rotation of a grinding disc and of the workpiece are aligned in parallel to one another and the grinding disc is moved relative to the workpiece in the longitudinal-axial direction of the workpiece during the grinding process. According to the invention, the first grinding disc is followed by a second grinding disc at a continuously constant distance, wherein the distance is determined by the width of the first grinding disc and the remaining grinding parameters, such as the rotational speeds of the first grinding disc and of the workpiece and the feed rate in the longitudinal-axial direction, such that the second grinding disc grinds the helical error lines generated by the first grinding disc during the grind process. A control device adjusts the distance between the first and second grinding discs.

Description

Verfahren und Vorrichtung zum Rundschleifen Process and device for cylindrical grinding
Die Erfindung betrifft ein Verfahren zum Rundschleifen von zylindrischen Werkstücken auf einer Schleifmaschine, bei dem die Rotationsachsen einer Schleifscheibe und des Werkstücks parallel zueinander ausgerichtet sind und die Schleifscheibe während des Schleifens relativ zum Werkstück in längsaxialer Richtung des Werkstücks bewegt wird. The invention relates to a method for cylindrical grinding of cylindrical workpieces on a grinding machine, in which the axes of rotation of a grinding wheel and the workpiece are aligned parallel to one another and the grinding wheel is moved during grinding relative to the workpiece in the longitudinal axial direction of the workpiece.
Das Schleifen eignet sich zur Fertigung von Teilen mit eng tolerierten Maßen, die durch Drehen oder Fräsen nicht herstellbar sind. Die Vorzüge des Schleifens sind insbesondere eine gute Bearbeitbarkeit harter Werkstoffe, eine hohe Maß- und Formgenauigkeit sowie kleine Welligkeiten und Rauheiten. Die rotierenden Schleifscheiben besitzen Schleifkörner, deren Lagen in der Schleifscheibe je Korn unbestimmt ist, so dass das Schleifen als Spanen mit geometrisch unbestimmten Schneiden bezeichnet wird. Beim Außen-Rund-Längsschleifen wird über den Längsvorschub eines Werkstückschlittens das Werkstück an der Schleifscheibe entlanggeführt. Eine weitere Variante stellt das sog. spitzenlose Rundschleifen dar, bei dem die runden, zylindrischen Werkstücke bei der Bearbeitung mit einer Schleifscheibe durch eine Regelscheibe an die Schleifscheibe angedrückt werden. Grinding is suitable for manufacturing parts with tightly toleranced dimensions that cannot be produced by turning or milling. The advantages of grinding are, in particular, good machinability of hard materials, high dimensional and shape accuracy as well as small waviness and roughness. The rotating grinding wheels have grinding grains whose position in the grinding wheel is undefined for each grain, so that grinding is referred to as cutting with geometrically undefined cutting edges. With external cylindrical longitudinal grinding, the workpiece is guided along the grinding wheel via the longitudinal feed of a workpiece slide. Another variant is the so-called centerless cylindrical grinding, in which the round, cylindrical workpieces are pressed against the grinding wheel by a regulating wheel when being processed with a grinding wheel.
Gleichgültig welches Außen-Rundschleifverfahren gewählt wird, hinterlassen beim Längsschleifen die verwendeten Schleifscheiben häufig eine vom Vorschub abhängige wendeiförmige Fehlerlinie auf dem Werkstück. Regardless of which external cylindrical grinding method is selected, the grinding wheels used for longitudinal grinding often leave a helical error line on the workpiece, which depends on the feed.
Es ist Aufgabe der vorliegenden Erfindung ein Verfahren und eine Schleifvorrichtung anzugeben, womit derartige Oberflächenfehler an der Werkstückoberfläche beseitigt oder zumindest zu geringen Rauigkeitstiefen minimiert wird. It is the object of the present invention to specify a method and a grinding device with which such surface defects on the workpiece surface are eliminated or at least minimized to small roughness depths.
Diese Aufgabe wird durch ein Verfahren nach Anspruch 1 gelöst, dass dadurch gekennzeichnet ist, dass eine zweite Schleifscheibe der ersten Schleifscheibe in stets gleichbleibendem Abstand folgt, wobei der Abstand durch die Breite der ersten Schleifscheibe und die übrigen Schleifparameter wie die Rotationsgeschwindigkeiten der ersten Schleifscheibe sowie des Werkstückes und den Vorschub in längsaxialer Richtung so bestimmt wird, dass die zweite Schleifscheibe die wendeiförmigen Fehlerlinien schleifend bearbeitet, welche die erste Schleifscheibe beim Schleifen erzeugt hat. This object is achieved by a method according to claim 1, characterized in that a second grinding wheel follows the first grinding wheel at a constant distance, the distance being determined by the width of the first grinding wheel and the other grinding parameters such as the rotational speeds of the first grinding wheel and the workpiece and the feed in the longitudinal axial direction is determined in such a way that the second grinding wheel grinds the helical fault lines which the first grinding wheel has produced during grinding.
Anders ausgedrückt, beim erfindungsgemäßen Verfahren beseitigt eine zweite Schleifscheibe die in Wendelform auftretenden Oberflächenfehler im Werkstück. Die Form, Anordnung oder Antrieb der zweiten Schleifscheibe kann beliebig gewählt werden, so lange sichergestellt ist, dass die genannte wendeiförmige Grenzlinie an der Werkstückoberfläche nachbearbeitet wird. In other words, in the method according to the invention, a second grinding wheel eliminates the surface defects in the workpiece that occur in a helical form. The shape, arrangement or drive of the second grinding wheel can be selected as desired, as long as it is ensured that the said helical boundary line on the workpiece surface is reworked.
Die Schleifscheiben können Schleifkörner mit gleichen oder verschiedenen Granulometrien aufweisen. The grinding wheels can have abrasive grains with the same or different granulometry.
Vorzugsweise Ausgestaltungen ergeben sich aus den Unteransprüchen. Preferred configurations result from the dependent claims.
Nach einer bevorzugten Ausführungsform sind die erste und die zweite Schleifscheibe auf derselben Drehachse montiert und werden mit gleicher Drehgeschwindigkeit beim Schleifen angetrieben. Dies hat den Vorteil, dass nur ein Antrieb verwendet werden muss. According to a preferred embodiment, the first and second grinding wheels are mounted on the same axis of rotation and are driven at the same rotational speed during grinding. This has the advantage that only one drive needs to be used.
Oberflächenfehler lassen sich auch dann optimal vermeiden, wenn beide Schleifscheiben beim Schleifen mit demselben Anpressdruck beaufschlagt werden. Surface defects can also be optimally avoided if both grinding wheels are subjected to the same contact pressure during grinding.
Prinzipiell ist das erfindungsgemäße Schleifverfahren sowohl bei gegensinnig oder gleichsinnigen Rotationen von Schleifscheiben und Werkstück anwendbar, eine gleichsinnige Rotation von Schleifscheibe und Werkstück unter der Voraussetzung, dass unterschiedliche Rotationsgeschwindigkeiten gewählt werden, damit eine Relativbewegung zwischen der Schleifscheibe und dem Werkstück einstellbar ist. In principle, the grinding method according to the invention can be used for counter-rotating or co-rotating grinding wheels and workpieces, a co-rotating grinding wheel and workpiece provided that different rotational speeds are selected so that a relative movement between the grinding wheel and the workpiece can be set.
Zur Lösung dieser Aufgabe dient die im Anspruch 5 beschriebene Schleifvorrichtung, die durch eine zweite Schleifscheibe gekennzeichnet ist, die im Abstand zur ersten Schleifscheibe rotierbar angeordnet ist. Vorzugsweise besitzen beide Schleifscheiben einen gemeinsamen Regel- oder steuerbaren Antrieb und/oder sind auf derselben Achse angeordnet. To solve this problem, the grinding device described in claim 5 is used, which is characterized by a second grinding wheel, the distance to the first Grinding wheel is rotatably arranged. Both grinding wheels preferably have a common variable or controllable drive and/or are arranged on the same axis.
Um unterschiedliche Schleifgeschwindigkeiten wählen zu können, welche einen entscheidenden Einfluss auf die Wendelform der Fehlerlinie haben, ist der Abstand der ersten Schleifscheibe zur zweiten Schleifscheibe einstellbar. Idealerweise ist eine Regelvorrichtung vorgesehen, die den Abstand der ersten zur zweiten Schleifscheibe so einstellt, dass die zweite Schleifscheibe beim Schleifen die wendeiförmigen Fehlerlinien überstreicht, welche die erste Schleifscheibe zuvor erzeugt hat. Durch diese Regeleinrichtung kann selbst bei kleinen Schwankungen des Längsvorschubs eine optimierte Oberflächenbehandlung sichergestellt werden. In order to be able to select different grinding speeds, which have a decisive influence on the helical shape of the fault line, the distance between the first grinding wheel and the second grinding wheel can be adjusted. Ideally, a control device is provided that adjusts the distance between the first and second grinding wheel in such a way that the second grinding wheel sweeps over the helical error lines during grinding, which the first grinding wheel previously produced. With this control device, an optimized surface treatment can be ensured even with small fluctuations in the longitudinal feed.
Weitere Vorteile und Ausstattungen der erfindungsgemäßen Vorrichtung bzw. des erfindungsgemäßen Verfahrens sind in den Zeichnungen dargestellt. Es zeigen: Further advantages and features of the device according to the invention and the method according to the invention are shown in the drawings. Show it:
Fig. 1a, b, c Prinzipskizzen der nach dem Stand der Technik bekannten Außenrund-Längsschleifverfahren und der dabei entstehenden Schleiffehler und 1a, b, c Schematic sketches of the external cylindrical longitudinal grinding methods known according to the state of the art and the resulting grinding errors and
Fig. 2 eine Prinzipskizze der erfindungsgemäßen Schleifvorrichtung mit erster und zweiter Schleifscheibe. 2 shows a basic sketch of the grinding device according to the invention with a first and second grinding wheel.
Aus Fig. 1a ist ersichtlich, dass auf dem zylinderförmigen Werkstück, dessen Oberfläche durch Schleifen bearbeitet werden soll, beim Außenrund-Längsschleifen wendeiförmige Fehlerlinien entstehen können, die beispielsweise durch nicht parallele Führung der Mantellinie der Schleifscheibe zur Längsschlittenbewegung oder thermische Beeinflussungen oder Abnutzungen des Abriebswerkzeugs (für die Schleifscheibe) sein können. Die Schleifscheibe 12 hinterlässt solche wendeiförmigen Schleifmarken, deren Steigung von dem durch den Pfeil 13 dargestellten relativen Vorschub der Schleifscheibe zum Werkstück 10 bestimmt ist. Das zylinderförmige Werkstück 10 ruht auf Rollen 14, 15, die vorzugsweise im gleichen Abstand als Stütz- und Antriebsrollen für die Drehbewegung des Werkstückes dienen. From Fig. 1a it can be seen that on the cylindrical workpiece, the surface of which is to be ground by grinding, helical error lines can arise during external cylindrical longitudinal grinding, which can be caused, for example, by non-parallel guidance of the surface line of the grinding wheel to the longitudinal slide movement or thermal influences or wear of the abrasion tool ( for the grinding wheel). The grinding wheel 12 leaves such helical grinding marks whose pitch is determined by the feed of the grinding wheel relative to the workpiece 10 shown by the arrow 13 . The cylindrical workpiece 10 rests on rollers 14, 15, which are preferably in equally spaced serve as support and drive rollers for the rotary movement of the workpiece.
Fig. 1 b und 1c zeigen unterschiedliche Antriebsmöglichkeiten: Fig. 1b and 1c show different drive options:
Nach den Verfahren gemäß Fig. 1 b werden die Antriebsrollen 14, 15, auf denen das zylinderförmige Werkstück aufliegt, gegensinnig zur Drehrichtung der Schleifscheibe 12 rotierend bewegt. Die Schleifscheibe 12 sowie das zylinderförmige Werkstück 10 bewegen sich in derselben Drehrichtung, weshalb zum Schleifen die Drehgeschwindigkeiten des zylinderförmigen Werkstückes 10 und der Schleifscheibe unterschiedlich sein müssen. According to the method according to FIG. 1b, the drive rollers 14, 15, on which the cylindrical workpiece rests, are rotated in the opposite direction to the direction of rotation of the grinding wheel 12. The grinding wheel 12 and the cylindrical workpiece 10 move in the same direction of rotation, which is why the rotational speeds of the cylindrical workpiece 10 and the grinding wheel must be different for grinding.
Bei der Verfahrenstechnik nach Fig. 1c treiben die Antriebsrollen 14, 15 das Werkstück in einer Richtung an, die gegensinnig zur Drehrichtung der Schleifscheibe 12 ist. In the process technology according to FIG. 1c, the drive rollers 14, 15 drive the workpiece in a direction which is opposite to the direction of rotation of the grinding wheel 12.
Wie Fig. 2 zeigt, wird beim erfindungsgemäßen Schleifverfahren zusätzlich zur ersten Schleifscheibe 12 eine zweite Schleifscheibe 16 verwendet, die im vorliegenden Fall denselben Durchmesser wie die erste Schleifscheibe 12 hat und die auf derselben Drehachse montiert ist. Durch einen nicht dargestellten gemeinsamen Antrieb erfahren die Schleifscheiben 12 und 16 dieselbe Drehgeschwindigkeit. Der Abstand der ersten Schleifscheibe 12 zur zweiten Schleifscheibe 16, der über eine (nicht dargestellte Regelvorrichtung) variabel einstellbar ist, richtet sich danach welche spiral- bzw. wendeiförmigen Verlauf die Oberflächenfehler auf dem Werkstück 10 haben. Die zweite Schleifscheibe folgt dieser wendeiförmigen Fehlerlinie und beseitigt die Oberflächenfehler. As shown in FIG. 2, in the grinding method according to the invention, in addition to the first grinding wheel 12, a second grinding wheel 16 is used, which in the present case has the same diameter as the first grinding wheel 12 and which is mounted on the same axis of rotation. The grinding wheels 12 and 16 experience the same rotational speed due to a common drive (not shown). The distance between the first grinding wheel 12 and the second grinding wheel 16, which can be variably adjusted via a control device (not shown), depends on the spiral or helical course of the surface defects on the workpiece 10. The second grinding wheel follows this helical line of defects and eliminates the surface defects.
Grundsätzlich ist das erfindungsgemäße Verfahren für sämtliche Außenrund- oder auch Innenrund-Schleifverfahren geeignet, gleichgültig welche Dimensionen das Werkstück besitzt und aus welchem Material das Werkstück besteht. In principle, the method according to the invention is suitable for all external cylindrical or internal cylindrical grinding processes, regardless of the dimensions of the workpiece and the material of which the workpiece is made.
Als Nebeneffekt lässt sich mit dem erfindungsgemäßen Verfahren auch eine Nachbearbeitung der Werkstückoberfläche auf einfachste Weise erreichen. Die erste und zweite Schleifscheibe kann feststehend angeordnet sein, so dass der Werkstückvorschub durch eine Linearbewegung des zylinderförmigen Werkstücks 10 erzeugt wird. Alternativ hierzu kann bei fest eingespanntem Werkstück auch das aus erster und zweiter Schleifscheibe bestehende Tandem-Schleifscheibenpaar längsaxial zum Werkstück bewegt werden. As a side effect, post-processing of the workpiece surface can also be achieved in the simplest way with the method according to the invention. The first and the second grinding wheel can be fixed so that the workpiece feed is generated by a linear movement of the cylindrical workpiece 10 . As an alternative to this, when the workpiece is firmly clamped, the tandem grinding wheel pair consisting of the first and second grinding wheel can also be moved longitudinally and axially to the workpiece.
Bezuqszeichenliste Reference character list
10 zylinderförmiges Werkstück10 cylindrical workpiece
11 wendeiförmige Grenzlinien11 spiral border lines
12 Schleifscheibe 12 grinding wheel
13 Vorschubrichtung 13 feed direction
14, 15 Antriebsrollen 14, 15 drive rollers
16 zweite Schleifscheibe 16 second grinding wheel

Claims

7 Ansprüche 7 claims
1. Verfahren zum Rundschleifen von zylindrischen Werkstücken (10) auf einer Schleifmaschine, bei dem die Rotationsachsen einer (ersten) Schleifscheibe (12) und des Werkstückes (10) parallel zueinander ausgerichtet sind und die (erste) Schleifscheibe (12) während des Schleifens relativ zum Werkstück (10) in längsaxialer Richtung (13) des Werkstückes (10) bewegt wird, dadurch gekennzeichnet, dass eine zweite Schleifscheibe (16) der ersten Schleifscheibe (12) in stets gleichbleibendem Abstand folgt, wobei der Abstand durch die Breite der ersten Schleifscheibe (12) und die übrigen Schleifparameter wie die Rotationsgeschwindigkeiten der ersten Schleifscheibe (12) sowie des Werkstückes (10) und den Vorschub in längsaxialer Richtung so bestimmt wird, dass die zweite Schleifscheibe (16) die wendeiförmigen Fehlerlinien schleifend bearbeitet, welche die erste Schleifscheibe beim Schleifen erzeugt hat. 1. A method for cylindrical grinding of cylindrical workpieces (10) on a grinding machine, in which the axes of rotation of a (first) grinding wheel (12) and the workpiece (10) are aligned parallel to one another and the (first) grinding wheel (12) during grinding relatively to the workpiece (10) in the longitudinal axial direction (13) of the workpiece (10), characterized in that a second grinding wheel (16) follows the first grinding wheel (12) at an always constant distance, the distance being determined by the width of the first grinding wheel (12) and the other grinding parameters such as the rotational speeds of the first grinding wheel (12) and the workpiece (10) and the feed in the longitudinal axial direction is determined in such a way that the second grinding wheel (16) grinds the helical fault lines, which the first grinding wheel produces during created loops.
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass die erste und die zweite Schleifscheibe (12, 16) auf derselben Drehachse montiert sind und mit gleicher Drehgeschwindigkeit beim Schleifen angetrieben werden. 2. The method according to claim 1, characterized in that the first and the second grinding wheel (12, 16) are mounted on the same axis of rotation and are driven at the same rotational speed during grinding.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass beide Schleifscheiben (12, 16) beim Schleifen mit demselben Anpressdruck beaufschlagt werden. 3. The method according to claim 1 or 2, characterized in that both grinding wheels (12, 16) are subjected to the same contact pressure during grinding.
4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Schleifscheiben (12, 16) einerseits und das Werkstück (10) andererseits gegensinnig oder gleichsinnig, aber mit unterschiedlichen Rotationsgeschwindigkeiten gedreht werden. 8 Schleifvorrichtung, mit einer ersten Schleifscheibe (12), die um eine Drehachse rotierend antreibbar ist, die parallel zur Längsachse eines zu bearbeitenden Werkstückes (10) verläuft, und mit einer Vorschubeinrichtung, die während des Schleifens eine Relativbewegung zwischen dem Werkstück (10) und der Schleifscheibe (12) in längsaxialer Richtung des Werkstücks erzeugt, und mit einer zweiten Schleifscheibe (16), die im Abstand zur ersten Schleifscheibe (12) rotierbar angeordnet ist gekennzeichnet durch eine Regelvorrichtung, welche den Abstand der ersten (12) zur zweiten Schleifscheibe (16) so einstellt, dass die zweite Schleifscheibe beim Schleifen die wendeiförmige Fehlerlinie überstreicht, welche die erste Schleifscheibe (12) zuvor erzeugt hat. Schleifvorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass beide Schleifscheiben (12, 16) auf derselben Achse angeordnet sind und einen gemeinsamen regel- oder steuerbaren Antrieb besitzen. Schleifvorrichtung nach Anspruch 5 oder 6, dadurch gekennzeichnet, dass der Abstand der ersten Schleifscheibe (12) zur zweiten Schleifscheibe (16) einstellbar ist. 4. The method according to any one of claims 1 to 3, characterized in that the grinding wheels (12, 16) on the one hand and the workpiece (10) on the other hand are rotated in opposite directions or in the same direction, but at different rotational speeds. 8 Grinding device, with a first grinding wheel (12) which can be driven to rotate about an axis of rotation which runs parallel to the longitudinal axis of a workpiece (10) to be machined, and with a feed device which, during grinding, causes a relative movement between the workpiece (10) and of the grinding wheel (12) in the longitudinal axial direction of the workpiece, and with a second grinding wheel (16) which is arranged rotatably at a distance from the first grinding wheel (12), characterized by a control device which controls the distance between the first (12) and the second grinding wheel ( 16) in such a way that the second grinding wheel sweeps over the helical error line that the first grinding wheel (12) previously produced. Grinding device according to Claim 5, characterized in that both grinding wheels (12, 16) are arranged on the same axis and have a common variable or controllable drive. Grinding device according to Claim 5 or 6, characterized in that the distance between the first grinding wheel (12) and the second grinding wheel (16) can be adjusted.
EP21749084.6A 2020-08-05 2021-07-08 Method and device for cylindrical grinding Pending EP4100205A1 (en)

Applications Claiming Priority (2)

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DE102020120617.8A DE102020120617A1 (en) 2020-08-05 2020-08-05 Process and device for cylindrical grinding
PCT/DE2021/100596 WO2022028643A1 (en) 2020-08-05 2021-07-08 Method and device for cylindrical grinding

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EP (1) EP4100205A1 (en)
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Publication number Priority date Publication date Assignee Title
US2396505A (en) 1943-06-22 1946-03-12 Bridgeport Safety Emery Wheel Grinding
DE10100871C1 (en) 2001-01-11 2002-06-20 Sms Eumuco Gmbh Headless grinding machine, for grinding long workpieces, has second grindstone saddle fitted in running direction of workpiece and independent of first saddle
EP1681137B2 (en) 2004-12-30 2010-11-10 Niesi Mr.Giuseppe Grinding device and use of same grinding device for rectifying cylindrical items, apparatus and method for rectifying cylindrical items
US20110028074A1 (en) 2009-08-03 2011-02-03 Canon Kabushiki Kaisha Polishing method for a workpiece and polishing tool used for the polishing method
DE102011102113A1 (en) * 2011-05-20 2012-11-22 Schaudt Mikrosa Gmbh Grinding machine for grinding of external surfaces of work-piece, particularly for outer circular- or non-circular grinding, has work-piece adapter with work-piece holder, where work-piece adapter is designed to support rotational driving

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DE102020120617A1 (en) 2022-02-10
WO2022028643A1 (en) 2022-02-10

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