EP0242593A2 - Method of grinding cylindrical surfaces externally - Google Patents

Method of grinding cylindrical surfaces externally Download PDF

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Publication number
EP0242593A2
EP0242593A2 EP87104056A EP87104056A EP0242593A2 EP 0242593 A2 EP0242593 A2 EP 0242593A2 EP 87104056 A EP87104056 A EP 87104056A EP 87104056 A EP87104056 A EP 87104056A EP 0242593 A2 EP0242593 A2 EP 0242593A2
Authority
EP
European Patent Office
Prior art keywords
workpiece
rocker
roller
grinding wheel
infeed
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.)
Granted
Application number
EP87104056A
Other languages
German (de)
French (fr)
Other versions
EP0242593A3 (en
EP0242593B1 (en
Inventor
Paul Kohler
Heinz Keck
Theodor Bähr
Gerd Krattenmacher
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.)
JM Voith GmbH
Original Assignee
JM Voith GmbH
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 JM Voith GmbH filed Critical JM Voith GmbH
Priority to AT87104056T priority Critical patent/ATE89775T1/en
Publication of EP0242593A2 publication Critical patent/EP0242593A2/en
Publication of EP0242593A3 publication Critical patent/EP0242593A3/en
Application granted granted Critical
Publication of EP0242593B1 publication Critical patent/EP0242593B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B24B5/02—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
    • 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
    • B24B5/16—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 peculiarly surfaces, e.g. bulged
    • B24B5/167—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 peculiarly surfaces, e.g. bulged for rolls with large curvature radius, e.g. mill rolls
    • 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
    • B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation

Definitions

  • the invention relates to a method for external cylindrical grinding of rotationally symmetrical workpieces according to the preamble of claim 1. Such a method is known from US-PS 42 18 850.
  • the tool holder or the tool slide is mounted on a rocker which rotates about a to the longitudinal axis of the workpiece, e.g. Roller, parallel pivot axis is pivotally mounted.
  • a cam disc mounted on the longitudinal tool slide serves to control the pivoting movement of the rocker and thus the infeed movement of the grinding wheel. This depends on the values stored in a computer (see e.g. US 42 18 850).
  • bearing blocks 4 and 5 are arranged, on which the roller R is mounted by means of its lateral pins 2 and 3. Centering by means of centering pins 6 and 7 is provided.
  • the drive takes place from the motor 8 via a disk 10 which engages by means of rollers 9 and 11 on cams 12 of a driver part 33 which is clamped at the right end of the roller.
  • the longitudinal slide 14 of the tool holder is mounted on the front tool bed 13. This is driven translationally via drive motor 18, shaft 22 and gear 21. Support 17 is slidably mounted on longitudinal slide 14, the drive of which is not shown here.
  • the rocker 16 is adjusted by a threaded spindle 37 of a gear 36, which is driven by a motor 40, which is preferably a stepper motor.
  • the diameter can be measured by means of the devices 33, 38 and 39, but the diameter at the two roller ends can also be measured easily by hand using a hand-held measuring device.
  • This diameter or the deviation of the two diameters is related to the distances of the support 17 or rocker 16 and grinding wheel 15 measured by the rotary encoder 44 when sparking from the roller surface in the area of these two roller ends, or also to the difference between these two relative ends Stretching.
  • a resulting remaining difference is a measure of the inclination of the roller with respect to the tool bed 13 or the travel of the grinding wheel 5 in the longitudinal direction of this bed.
  • This difference is entered as a correction value in the computer, which takes this correction into account in its program when producing the profile of the roll surface.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

Provided in the external cylindrical grinding machine is a rocker on which the grinding wheel is mounted and which is adjusted by a threaded spindle which is driven by a stepping motor or a digital motor. The infeed of the grinding wheel, i.e. the adjustment of the rocker, is controlled by a computer in accordance with the axial travel of the rocker or of the tool slide as a function of the oblique position of the roller to be ground with regard to the axial travel of the rocker or the tool slide. <IMAGE>

Description

Die Erfindung betrifft ein Verfahren zum Außenrundschleifen von rotationssymmetrischen Werkstücken entsprechend dem Oberbegriff des Patentanspruchs 1. Ein solches Verfahren ist bekannt aus US-PS 42 18 850.The invention relates to a method for external cylindrical grinding of rotationally symmetrical workpieces according to the preamble of claim 1. Such a method is known from US-PS 42 18 850.

Bei dieser dem Verfahren zugrunde liegenden Einrichtung ist die Werkzeugaufnahme bzw. der Werkzeugschlitten auf einer Wippe ge­lagert, die um eine zur Längsachse des Werkstücks, z.B. Walze, parallele Schwenkachse schwenkbar gelagert ist. Eine auf dem Werkzeuglängsschlitten gelagerte Kurvenscheibe dient dabei dazu, die Verschwenkbewegung der Wippe und damit die Zustellbewegung der Schleifscheibe zu steuern. Dies erfolgt abhängig von den in einem Rechner gespeicherten Werten (siehe z.B. US 42 18 850).In this device on which the method is based, the tool holder or the tool slide is mounted on a rocker which rotates about a to the longitudinal axis of the workpiece, e.g. Roller, parallel pivot axis is pivotally mounted. A cam disc mounted on the longitudinal tool slide serves to control the pivoting movement of the rocker and thus the infeed movement of the grinding wheel. This depends on the values stored in a computer (see e.g. US 42 18 850).

Bei dem Schleifen von Walzen, wobei es auf sehr große Genauig­keit von wenigen tausendstel Millimetern ankommt, sind die ver­schiedensten Fehlermöglichkeiten und es sind auch einige Korrek­turmöglichkeiten im Stand der Technik bekanntgeworden. Gemäß US-PS 45 16 212 hat man Maßnahmen getroffen, um ein nicht voll­ständig starres Verhalten von Werkzeugaufnahme bzw. Werkzeug­schlitten und Werkzeugbett zu kompensieren. Hierbei wird laufend der gerade hergestellte Durchmesser des Werkstücks sowie die Abweichung von dem jeweils eingestellten Sollwert erfaßt, und entsprechend der Differenz eine Nachstellung der Schleifscheibe abhängig von einer gemessenen Leistungsdifferenz des Schleif­scheibenantriebs vorgenommen.When grinding rollers, where very high accuracy of a few thousandths of a millimeter is important, the most varied of error possibilities are known and some correction options have also become known in the prior art. According to US-PS 45 16 212 measures have been taken to compensate for a not completely rigid behavior of the tool holder or tool slide and tool bed. The diameter of the workpiece that has just been produced and the deviation from the respectively set target value are continuously recorded, and the grinding wheel is readjusted according to the difference depending on a measured power difference of the grinding wheel drive.

Erfindungsgemäß hat man erkannt, daß eine Fehlerquelle auch eine Schiefstellung des Werkstücks in der Aufspannung bzw. im Ver­hältnis zum Werkzeugbett ist. Die Aufgabe der Erfindung ist es, diesen Fehler zu korrigieren. Diese Aufgabe wird erfindungsgemäß durch die Merkmale des kennzeichnenden Teils des Patentanspruchs 1 gelöst.According to the invention, it has been recognized that a source of error is also an inclination of the workpiece in the clamping or in relation to the tool bed. The object of the invention is correct this mistake. This object is achieved by the features of the characterizing part of patent claim 1.

Eine besonders vorteilhafte Ausbildung ergibt sich dabei mit Patentanspruch 2.A particularly advantageous embodiment results from claim 2.

Nachfolgend wird die Erfindung anhand eines in der Zeichnung dargestellten Ausführungsbeispiels erläutert. Dabei stellt

  • Fig. 1 eine Draufsicht auf die Werkzeugmaschine mit aufge­spannter Walze R und
  • Fig. 2 und 3 Querschnitte entsprechend der Angabe in Fig. 1 dar.
The invention is explained below using an exemplary embodiment shown in the drawing. It poses
  • Fig. 1 is a plan view of the machine tool with the roll R and
  • 2 and 3 are cross sections as shown in Fig. 1.

Auf dem Werkzeugbett 1 sind Lagerböcke 4 und 5 angeordnet, auf denen die Walze R mittels ihrer seitlichen Zapfen 2 und 3 gela­gert ist. Es ist eine Zentrierung mittels Zentrierzapfen 6 und 7 vorgesehen. Der Antrieb erfolgt vom Motor 8 über eine Scheibe 10, die mittels Rollen 9 und 11 an Nocken 12 eines Mitnehmer­teils 33 angreift, das an dem rechten Walzenende festgespannt ist. Auf dem vorderen Werkzeugbett 13 ist der Längsschlitten 14 der Werkzeughalterung gelagert. Dieser wird translatorisch ange­trieben über Antriebsmotor 18, Welle 22 und Getriebe 21. Auf dem Längsschlitten 14 ist der Support 17 verschieblich gelagert, dessen Antrieb aber hier nicht dargestellt ist. Auf dem Support befindet sich nun die durch Lagerbolzen 41 in einer zur Walzen­achse senkrechten Ebene schwenkbare Wippe 16, die die Schleif­scheibe 15 samt deren Antriebsmotor trägt. Nach der Bewegung des Schlittens 14 werden die Führungsbahnen des Betts 13 durch Te­leskopabdeckungen 25 und 26 abgedeckt. Es ist in Fig. 1 noch ein kleines Bett 35 für einen Meßschlitten dargestellt, der den di­gitalen Wegaufnehmer 39, den zugehörigen Auswert- und Anzeige­teil 33 sowie den Meßwagen 38 trägt, der als Motor bzw. mit einem Motor integriert ausgebildet ist. Dies ist aber keine un­bedingt notwendige Einrichtung; es können nämlich für den vor­liegenden Zweck auch die Durchmesser der Walze getrennt mit einem Handgerät gemessen werden. Die verschiedenen Werkzeugwege werden durch Drehwegaufnehmer gemessen, wie z.B. für die Längs­bewegung des Schlittens 14 bei 24 und für die Supportbewegung bei 44 angedeutet.On the tool bed 1 bearing blocks 4 and 5 are arranged, on which the roller R is mounted by means of its lateral pins 2 and 3. Centering by means of centering pins 6 and 7 is provided. The drive takes place from the motor 8 via a disk 10 which engages by means of rollers 9 and 11 on cams 12 of a driver part 33 which is clamped at the right end of the roller. The longitudinal slide 14 of the tool holder is mounted on the front tool bed 13. This is driven translationally via drive motor 18, shaft 22 and gear 21. Support 17 is slidably mounted on longitudinal slide 14, the drive of which is not shown here. On the support is now the rocker 16 which can be pivoted by bearing bolts 41 in a plane perpendicular to the roller axis and which bears the grinding wheel 15 together with its drive motor. After the carriage 14 has moved, the guideways of the bed 13 are covered by telescopic covers 25 and 26. There is also shown in FIG. 1 a small bed 35 for a measuring slide which carries the digital displacement sensor 39, the associated evaluation and display part 33 and the measuring carriage 38, which acts as a motor or with a motor is integrated. However, this is not an absolutely necessary facility; namely, for the present purpose, the diameter of the roller can also be measured separately with a hand-held device. The various tool paths are measured by rotary displacement sensors, as indicated for example for the longitudinal movement of the slide 14 at 24 and for the support movement at 44.

Die Verstellung der Wippe 16 erfolgt durch eine Gewindespindel 37 eines Getriebes 36, das von einem Motor 40, der vorzugsweise ein Schrittmotor ist, angetrieben wird.The rocker 16 is adjusted by a threaded spindle 37 of a gear 36, which is driven by a motor 40, which is preferably a stepper motor.

Wie gesagt, kann die Messung des Durchmessers mittels der Ein­richtung 33, 38 und 39 erfolgen, jedoch kann auch ohne weiteres von Hand mit einem Handmeßgerät jeweils der Durchmesser an den beiden Walzenenden gemessen werden. Diese Durchmesser bzw. die Abweichung der beiden Durchmesser wird in Bezug gesetzt zu den vom Drehweggeber 44 gemessenen Abständen des Supports 17 bzw. Wippe 16 und Schleifscheibe 15 beim Anfunken von der Walzenober­fläche im Bereich dieser beiden Walzenenden, bzw. ebenfalls zu der Differenz dieser beiden relativen Wegstrecken. Eine hieraus resultierende, weitere restliche Differenz ist ein Maß für die Schiefstellung der Walze in Bezug auf das Werkzeugbett 13 bzw. den Verfahrweg der Schleifscheibe 5 in Längsrichtung dieses Bet­tes. Diese Differenz wird als Korrekturwert in den Rechner ein­gegeben, der diese Korrektur in seinem Programm bei der Herstel­lung des Profils der Walzenoberfläche berücksichtigt. Hierdurch kann sowohl eine genau zylindrische als auch eine genaue Bom­bierkurve geschliffen werden, ohne daß der Schiefstellungsfehler hier stark eingeht. Praktisch heißt das, daß z.B. bei der Her­stellung einer bombierten Walzenoberfläche, die Impulse für den Schrittmotor 40 je nach Stellung der Schleifscheibe 15 in Rich­tung der Walzenachse entsprechend einem korrigierten Sollwert aufgegeben werden.As said, the diameter can be measured by means of the devices 33, 38 and 39, but the diameter at the two roller ends can also be measured easily by hand using a hand-held measuring device. This diameter or the deviation of the two diameters is related to the distances of the support 17 or rocker 16 and grinding wheel 15 measured by the rotary encoder 44 when sparking from the roller surface in the area of these two roller ends, or also to the difference between these two relative ends Stretching. A resulting remaining difference is a measure of the inclination of the roller with respect to the tool bed 13 or the travel of the grinding wheel 5 in the longitudinal direction of this bed. This difference is entered as a correction value in the computer, which takes this correction into account in its program when producing the profile of the roll surface. As a result, both a precisely cylindrical and an exact crowning curve can be ground without the misalignment error being greatly affected here. In practice, this means that, for example, when producing a cambered roller surface, the pulses for the stepper motor 40 are given in accordance with a corrected setpoint depending on the position of the grinding wheel 15 in the direction of the roller axis.

Es ist natürlich auch möglich, den Werkzeugschlitten - trans­versal - bei Vermeidung der Wippe digital gesteuert über z.B. ein mit Stirnverzahnungsrädern und/oder Kegelrädern ausgebilde­tes Getriebe über einen Schrittmotor zu verstellen, wie geschil­dert, abhängig von den vorher ermittelten Korrekturwerten der Zustellung der Schleifscheibe.It is of course also possible to digitally control the tool slide - transversely - by avoiding the rocker e.g. to adjust a gear designed with spur gears and / or bevel gears via a stepper motor, as described, depending on the previously determined correction values for the infeed of the grinding wheel.

Claims (3)

1. Verfahren zum Außenrundschleifen von rotationssymmetrischen Werkstücken (Walzen oder Zylindern oder Hohlzylindern) mit­tels rechnergesteuerter Schleifmaschinen, dadurch gekenn­zeichnet, daß abhängig von vorher bei Einrichtung der Ma­schine bzw. vor der Speisung der Prozeßsteuerung mit den Ausgangswerten gemessenen oder ermittelten Werten a) der Werkstückdurchmesser an den beiden (stirnseitigen) Werkstückenden und b) der erfaßten Wegdifferenz der an den beiden Werkstück­enden sich ergebenden Zustellung der Schleifscheibe (15) beim Anfunken 1. A method for external cylindrical grinding of rotationally symmetrical workpieces (rollers or cylinders or hollow cylinders) by means of computer-controlled grinding machines, characterized in that, depending on previously measured or determined values with the initial values when the machine was set up or before the process control was fed a) the workpiece diameter at the two (front) workpiece ends and b) the detected path difference of the infeed of the grinding wheel (15) at the two workpiece ends when sparking in den Rechner je Längeneinheit des Werkstücks (Walze, Zy­linder) Korrekturwerte der Zustellung oder der Bombierungs­kurve eingegeben werden.correction values for the infeed or the crowning curve can be entered into the computer for each length unit of the workpiece (roller, cylinder). 2. Einrichtung zur Durchführung des Verfahrens, dadurch ge­kennzeichnet, daß die Werkzeugaufnahme auf einem um eine zur Werkstückachse parallele Achse schwenkbar in Form einer Wippe (16) ausgebildeten Teil des Werkzeugschlittens (17) angeordnet ist, die durch veränderliche Einstellmittel (36), z.B. eine Gewindespindel (37), die durch einen Schrittmotor (40) angetrieben ist, um die genannte Achse (41) schwenkbar ist.2. Device for carrying out the method, characterized in that the tool holder is arranged on a part of the tool slide (17) which is designed to be pivotable about an axis parallel to the workpiece axis in the form of a rocker (16) and which can be adjusted by variable setting means (36), e.g. a threaded spindle (37) which is driven by a stepper motor (40) about the said axis (41) is pivotable.
EP87104056A 1986-04-23 1987-03-19 Method of grinding cylindrical surfaces externally Expired - Lifetime EP0242593B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87104056T ATE89775T1 (en) 1986-04-23 1987-03-19 PROCESS FOR EXTERNAL CYLINDRICAL GRINDING.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863613733 DE3613733A1 (en) 1986-04-23 1986-04-23 EXTERNAL ROUND GRINDING METHOD
DE3613733 1986-04-23

Publications (3)

Publication Number Publication Date
EP0242593A2 true EP0242593A2 (en) 1987-10-28
EP0242593A3 EP0242593A3 (en) 1989-07-26
EP0242593B1 EP0242593B1 (en) 1993-05-26

Family

ID=6299343

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87104056A Expired - Lifetime EP0242593B1 (en) 1986-04-23 1987-03-19 Method of grinding cylindrical surfaces externally

Country Status (6)

Country Link
EP (1) EP0242593B1 (en)
JP (1) JPS62297065A (en)
KR (1) KR870009817A (en)
AT (1) ATE89775T1 (en)
DE (2) DE3613733A1 (en)
ES (1) ES2040709T3 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0395576A1 (en) * 1989-04-28 1990-10-31 Moser, Jean P. Schleifmaschinen Cylindrical grinding machine with pivotable worktable
US6379227B1 (en) 1997-04-10 2002-04-30 Valmet Corporation Abrasive-band grinding device and method for controlling an abrasive-band grinding device during grinding of faces of crowned rolls
CN111791101A (en) * 2020-07-22 2020-10-20 柳友香 Cold rolling mill roll surface treatment device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2249128B1 (en) * 2004-05-06 2006-12-01 Danobat, S.Coop PRINT AND ROLLING ROLLER RECTIFIER MACHINE.

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2927650A1 (en) * 1978-07-14 1980-01-24 Tschudin Werkzeugmasch METHOD FOR ROUND GRINDING OF ROUND PARTS AND ROUND GRINDING MACHINE FOR CARRYING OUT THIS METHOD
US4218850A (en) * 1977-09-26 1980-08-26 Toshiba Kikai Kabushiki Kaisha Cambering devices of roll grinding lathes
US4516212A (en) * 1981-08-20 1985-05-07 Toshiba Kikai Kabushiki Kaisha Control system for roll grinding machine
EP0154683A2 (en) * 1984-03-14 1985-09-18 Hoesch Aktiengesellschaft Grinding machine for wet grinding rolls with slight profile

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1502423B2 (en) * 1964-11-17 1972-03-30 Farrel Corp., Ansonia, Conn. (V.StA.) DEVICE FOR ALIGNING A ROLLER ON A ROLLER GRINDING MACHINE
CH631646A5 (en) * 1978-09-06 1982-08-31 Meseltron Sa Process for the external cylindrical grinding of a plurality of diameters of a workpiece in a mount
DE2911320A1 (en) * 1979-03-22 1980-10-02 Fortuna Werke Maschf Ag METHOD FOR CONTROLLING, ERROR CORRECTION AND DETERMINING CHANGING SIZES IN GRINDING MACHINES FOR GRINDING WORKPIECES AND MEANS FOR IMPLEMENTING THE METHOD

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4218850A (en) * 1977-09-26 1980-08-26 Toshiba Kikai Kabushiki Kaisha Cambering devices of roll grinding lathes
DE2927650A1 (en) * 1978-07-14 1980-01-24 Tschudin Werkzeugmasch METHOD FOR ROUND GRINDING OF ROUND PARTS AND ROUND GRINDING MACHINE FOR CARRYING OUT THIS METHOD
US4516212A (en) * 1981-08-20 1985-05-07 Toshiba Kikai Kabushiki Kaisha Control system for roll grinding machine
EP0154683A2 (en) * 1984-03-14 1985-09-18 Hoesch Aktiengesellschaft Grinding machine for wet grinding rolls with slight profile

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0395576A1 (en) * 1989-04-28 1990-10-31 Moser, Jean P. Schleifmaschinen Cylindrical grinding machine with pivotable worktable
US6379227B1 (en) 1997-04-10 2002-04-30 Valmet Corporation Abrasive-band grinding device and method for controlling an abrasive-band grinding device during grinding of faces of crowned rolls
CN111791101A (en) * 2020-07-22 2020-10-20 柳友香 Cold rolling mill roll surface treatment device

Also Published As

Publication number Publication date
DE3613733A1 (en) 1987-10-29
ES2040709T3 (en) 1993-11-01
KR870009817A (en) 1987-11-30
EP0242593A3 (en) 1989-07-26
DE3785962D1 (en) 1993-07-01
ATE89775T1 (en) 1993-06-15
DE3613733C2 (en) 1993-01-14
EP0242593B1 (en) 1993-05-26
JPS62297065A (en) 1987-12-24

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