EP0560888B1 - Vorrichtung zum bearbeiten und zur oberflächenbehandlung von elastischen materialien - Google Patents

Vorrichtung zum bearbeiten und zur oberflächenbehandlung von elastischen materialien Download PDF

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Publication number
EP0560888B1
EP0560888B1 EP92901499A EP92901499A EP0560888B1 EP 0560888 B1 EP0560888 B1 EP 0560888B1 EP 92901499 A EP92901499 A EP 92901499A EP 92901499 A EP92901499 A EP 92901499A EP 0560888 B1 EP0560888 B1 EP 0560888B1
Authority
EP
European Patent Office
Prior art keywords
grinding wheel
machining
machined
spindle
recesses
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP92901499A
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English (en)
French (fr)
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EP0560888A1 (de
Inventor
Louis Rouyer
Jacques Bastin
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Createc Rollers
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Createc Rollers
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Publication date
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Publication of EP0560888A1 publication Critical patent/EP0560888A1/de
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Publication of EP0560888B1 publication Critical patent/EP0560888B1/de
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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
    • B24B5/36—Single-purpose machines or devices
    • B24B5/37—Single-purpose machines or devices for grinding rolls, e.g. barrel-shaped 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
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/50—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground, e.g. strings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
    • B24D5/10—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor with cooling provisions, e.g. with radial slots

Definitions

  • the present invention relates to a wheel device for machining, including surfacing, elastic and semi-elastic materials.
  • Two machining techniques are known from grinding wheels: the so-called “sweeping” technique according to which a grinding wheel with a width smaller than the length of the workpiece, "sweeps” the said workpiece by moving in front of it at a distance desired, and the so-called “plunge” technique according to which the workpiece is attacked by a grinding wheel whose width is at least equal to the length of this workpiece so as to carry out the machining thereof without having to move it laterally (see for example GB-A-1 150 996).
  • the "sweeping" technique has the double advantage over the “plunging” technique, allowing the use of smaller grinding wheels and ensuring the machining of parts made of elastic or semi-elastic materials.
  • the relative movement between the grinding wheel and the workpiece is radial with respect to the latter, and if the workpiece is made of somewhat elastic material, there is necessarily a crushing of the surface which prevents non-controlling not only the correct dimensioning of the part, but also its final surface condition.
  • the pressure exerted by the grinding wheel always causes, more or less, a deflection of the part during machining and the result of this deflection is to give the finished part a rounded shape. more or less important undesirable.
  • the object of the present invention is to propose a wheel device for machining, including surfacing, parts made of elastic or semi-elastic materials, making it possible to use the "plunge” technique while retaining the advantages of the technique. "sweeping" with regard to compliance with the dimensions and the final surface condition.
  • the grinding wheel acting "plunging" is provided with means capable of ensuring for a certain time, at the end of the machining operation, the immobilization of the part being machined in such a way that its axis of rotation is , to the right of its support points, at an equal distance, relative to the axis of rotation of the grinding wheel, to the sum of the theoretical radius of the desired part and the radius of the grinding wheel.
  • the invention is defined by claim 1.
  • This arrangement makes it possible to obtain, after roughing, a part with precise dimensions, therefore with a precise shape, and with a surface finish as fine as desired, even if these are parts made of elastic materials.
  • it is an oleo-pneumatic device which immobilizes the part being machined on the indication of an approach detector through a timer when said part arrives at the desired position.
  • the device according to the invention is provided with means allowing, during the roughing period, a slight floating of the axis of rotation of the part during machining.
  • two open supports are provided, each of which is constituted by a part comprising two surfaces arranged at right angles to one another, on which the axis of the part being machined is likely to be supported along two of its generators, on lines located less than 180 ° from each other relative to said axis of the part, means being provided to prevent this axis from escaping from these supports during the fluctuations experienced by said part.
  • the control in rotation of the part during machining is obtained by a flexible control, which allows without disadvantage, during machining, a bending of the axis carrying said part .
  • an adjustable support is provided which can exert on the roller during machining, a controlled elastic thrust s exerting against the pressure exerted by the grinding wheel.
  • Another means of reducing the pressure exerted by the grinding wheel on the workpiece consists, according to the invention, in using a grinding wheel having, over its entire periphery, recesses arranged so as to produce with the active surface portions , an alternation such that the active surface / recesses ratio is constant on any plane perpendicular to a generatrix of the grinding wheel and passing through any point of this generatrix.
  • the leading edges of the recesses existing on the surface of the grinding wheel form, with a generator of said grinding wheel, an angle other than zero, the advantage of such an arrangement being a lesser wear of the grinding wheel at the same time as a less brutal attack on the part to be removed.
  • the recesses of the grinding wheel are constituted by helical grooves extending over the entire length of the grinding wheel, which allows a technically easier realization and increases the scouring effect of the recesses on the grinding wheel.
  • Figure 1 is a front view of a machining device according to the invention.
  • Figure 2 is a plan view of Figure 1.
  • Figure 3 is a section along III-III of Figure 1.
  • FIG. 4 shows, on a larger scale, a detail of FIG. 3.
  • the apparatus comprises a frame 1 carrying a grinding wheel 2 which rotates around an axis 3 integral with the output shaft of a motor 4 with two positions, one ensuring only the drive in rotation of the axis and the grinding wheel, and the other simultaneously impulsing them an axial back and forth movement (arrow 38).
  • the grinding wheel 2 has a diameter of 15 centimeters and has, over its entire periphery, recesses formed by crossed helical grooves with a depth of 10 millimeters and arranged so that the ratio of active surface / recesses is constant over any plane perpendicular to a generatrix of the grinding wheel passing through any point of this generatrix.
  • This ratio is, in this case, 1, but may vary, however preferably between 0.8 and 1.2.
  • a mobile assembly 6, consisting of two plates 7 and 8, is capable of sliding on the base of the frame 1 thanks to two rails 5 with crossed rollers cooperating with two grooves provided on the plate 7.
  • the plate 7 has an operating stick 31 secured to the movable part of an oleopneumatic device 32 controlled, through a timer 39, by an approach detector 33.
  • the plate 8 rotatably mounted on the plate 7 by means of a pivot 9, has an angular locking device which is not shown because it is not part of the invention. It carries, at its upper part, two rails 10 perpendicular to the rails 5, and two supports 11 and, on the side, a plate 29 on which an electric motor 28 is arranged.
  • the rails 10 allow a mobile assembly 13 (see FIG. 4) essentially consisting of two slides 14 and 15, to move parallel to the axis 3 of the grinding wheel.
  • the slide 14 comprises a sole 16 and a heel 17, the sole 16 carrying on its upper surface, a guide rail 18, and on its lower surface, two grooves 12 corresponding to the two rails 10 of the plate 8.
  • the slider 15 carries, on the first part, a groove corresponding to the guide rail 18 of the slider 14, on the second part, a threaded rod 19 which freely crosses the heel 17 of said slider 14 and is provided with two nuts 20 at its end, and thirdly, an axis 21 on which two double levers 22 freely rotate, each of which carries two free wheels 23.
  • a spring 24 is threaded on the threaded rod 19 and is supported, on one side, on the heel 17, and on the other side, on the rear of the slide 15.
  • the supports 11 are arranged, in an adjustable manner, on a rail 36 parallel to the rails 10 on which the moving element 13 moves.
  • Their head is constituted by an asymmetrical notch constituting an open support for receiving the axis 26 and which is formed by two surfaces arranged at right angles to each other, namely the upper horizontal surface of the support and the side of a vertical projection 39.
  • a mobile stop 35 is provided, the role of which will be explained below.
  • a roller 25 is shown during machining. It is mounted on an axis 26 placed on the head of the supports 11, the mobile stops 35 being arranged, by means not shown because they are not part of the invention at a certain distance from the axis 26, and having for effect of preventing it from escaping from the supports 11 while allowing it to float slightly.
  • the axis 26 is secured by a fitting device 34, to a flexible control 27 constituted by a spring itself secured to the output shaft of the motor 28 carried by the plate 29 of the plate 8 .
  • the machining begins, each grain of the grinding wheel acting, due to the back and forth movement which it is animated, on an area of the roller 25 and not only on a line, which improves the regularity of the machining.
  • the presence of the recesses on the grinding wheel favors the aspiration of shavings and dust, thus ensuring permanent cleaning of the grinding wheel.
  • the oleo-pneumatic device stops the assembly 6, thus immobilizing the supports of the roller 25.
  • the timer 39 is triggered and the machining continues in this position since the roller continues to rotate, as well as the grinding wheel 2. If one wishes to give a non-cylindrical shape to the roller 25, however, the control of the reciprocating movement of the grinding wheel 2 is stopped.
  • the time during which the workpiece will be left to rotate after reaching the defined position will preferably be between 10 and 30 seconds depending on the desired grain size.
  • the timer 39 moves the movable assembly 6 backward.
  • the engine 28 is stopped.
  • the roller 25 is removed and it is uncoupled from its flexible control.
  • the recesses of the grinding wheel 2 could be made other than by crossed helical grooves. They could, for example, be the reverse of the embodiment illustrated by the figures, the grooves becoming the active surface of the grinding wheel and the diamonds becoming recesses which would then be discontinuous.
  • the flexible control 27 could obviously be replaced by a flexible cable or even a device with one or more cardan joints.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Springs (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)

Claims (13)

  1. Schleifvorrichtung mit walzenförmigem Schleifkörper für die spanende Bearbeitung und Oberflächenbehandlung von Werkstücken aus elastischem oder halbelastischem Werkstoff in "Einstechtechnik" unter Verwendung eines Schleifkörpers, dessen Breite mindestens der Länge des besagten zu bearbeitenden Werkstücks entspricht, dadurch gekennzeichnet, daß diese Vorrichtung über Hilfsmittel (32, 33, 39) verfügt, die über einen bestimmten Zeitraum nach Beendigung der Bearbeitung in der Lage sind, das besagte Werkstück (25) in einer Position zu fixieren, in der sich seine Drehachse (26) im rechten Winkel zu den Auflageflächen (11) in einer Entfernung zur Drehachse (3) des Schleifkörpers (2) befindet, die der Summe aus dem theoretischen Radius des gewünschten Werkstücks und dem Radius des besagten Schleifkörpers entspricht.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die besagten Hilfsmittel aus einer pneumatisch-ölhydraulischen Einrichtung (32), betätigt über einen Näherungssensor (33), und einer Schaltuhr (39) bestehen, welche ein mobiles System (6) in Bewegung versetzt, auf dem das Werkstück (25) während der Bearbeitung gelagert ist, wobei das besagte mobile System infolge der Aktion des besagten Näherungsschalters (33) über einen von der Schaltuhr (39) definierten Zeitraum immobilisiert wird.
  3. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß sie aus einem Hilfsmittel (13) besteht, welches auf das in Bearbeitung befindliche Werkstück (25) eine geregelte flexible Andruckkraft ausübt, die dem Druck des durch den Kontakt des Werkstücks mit dem Schleifkörper (2) entstehenden Druck entgegengerichtet ist.
  4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß das besagte Hilfsmittel (13) aus einem mobilen System (13) besteht, das mit einem Satz freilaufender Räder (23) ausgestattet ist, die elastisch gegen das in Bearbeitung befindliche Werkstück (25) gedrückt werden.
  5. Vorrichtung nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß sie aus einem Motor (4) besteht, der parallel zur Achse (3) des Schleifkörpers (2) eine Links-Rechts-Bewegung in Relation zu dem in Bearbeitung befindlichen Werkstück (25) ausführen kann.
  6. Vorrichtung nach Anspruch (5), dadurch gekennzeichnet, daß der Motor (4) geeignet ist, eine axiale Links-Rechts-Bewegung des Schleifkörpers (2) zu bewirken.
  7. Vorrichtung nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß sie aus einem Hilfsmittel (27) besteht, das während des Schruppens des Werkstücks ein leichtes Driften der Drehachse (26) des in Bearbeitung befindlichen Werkstücks (25) bewirkt.
  8. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, daß das Hilfsmittel (27) eine elastische Verbindung (27) zwischen dem in Bearbeitung befindlichen Werkstück und dem Motor (28) darstellt, welcher das Werkstück in Drehung versetzt.
  9. Vorrichtung nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß sie mit zwei offenen Auflagepunkten (11) versehen ist, die aus zwei winkelförmigen Flächen bestehen und jeweils ein Endstück der Achse (26) des in Bearbeitung befindlichen Werkstücks (25) aufnehmen, wobei zwei Anschläge (35) im rechten Winkel zu diesen Auflagen vorgesehen sind, um zu verhindern, daß sich die besagte Achse (26) aufgrund der während der Bearbeitung des Werkstücks (26) entstehenden Drift aus den Auflagepunkten bewegt.
  10. Vorrichtung nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß der Schleifkörper (2) auf seiner gesamten Oberfläche mit Vertiefungen ausgestattet ist, die sich mit den bearbeitungsaktiven Teilen der Oberfläche abwechseln, wobei sich diese Bereiche so abwechseln, daß das Verhältnis aktive Oberfläche/Vertiefungen auf der gesamten Ebene senkrecht zu einer Mantellinie des Schleifkörpers konstant ist, wobei diese Ebene die Mantellinie in einem beliebigen Punkt schneiden kann.
  11. Vorrichtung nach Anspruch (10), dadurch gekennzeichnet, daß das Verhältnis aktive Oberfläche/Vertiefung zwischen 0,8 und 1,2 liegt.
  12. Vorrichtung nach Anspruch (11), dadurch gekennzeichnet, daß die Stirnkanten der auf der Oberfläche des Schleifkörpers ausgeführten Vertiefungen mit der Mantellinie des besagten Schleifkörpers einen Winkel ungleich 0° bilden.
  13. Vorrichtung nach Anspruch (12), dadurch gekennzeichnet, daß die Vertiefungen des Schleifkörpers aus Spiralnuten bestehen.
EP92901499A 1990-12-05 1991-12-05 Vorrichtung zum bearbeiten und zur oberflächenbehandlung von elastischen materialien Expired - Lifetime EP0560888B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9015220 1990-12-05
FR9015220A FR2670150B1 (fr) 1990-12-05 1990-12-05 Dispositif d'usinage et de surface de materiaux elastiques.
PCT/FR1991/000972 WO1992010331A1 (fr) 1990-12-05 1991-12-05 Dispositif d'usinage et de surfaçage de materiaux elastiques

Publications (2)

Publication Number Publication Date
EP0560888A1 EP0560888A1 (de) 1993-09-22
EP0560888B1 true EP0560888B1 (de) 1994-07-06

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP92901499A Expired - Lifetime EP0560888B1 (de) 1990-12-05 1991-12-05 Vorrichtung zum bearbeiten und zur oberflächenbehandlung von elastischen materialien

Country Status (9)

Country Link
US (1) US5443411A (de)
EP (1) EP0560888B1 (de)
JP (1) JPH06505924A (de)
AT (1) ATE108114T1 (de)
AU (1) AU9103091A (de)
DE (1) DE69102772T2 (de)
ES (1) ES2059210T3 (de)
FR (1) FR2670150B1 (de)
WO (1) WO1992010331A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0806260B1 (de) * 1996-05-09 2002-02-13 FELIX BÖTTCHER GmbH & Co. Verfahren zum Entfernen von gebrauchten elastomeren Bezügen von Walzen sowie Vorrichtung zur Durchführung desselben
DE102012223276B4 (de) * 2012-12-14 2015-09-03 Erwin Junker Grinding Technology A.S. Verfahren und rundschleifmaschine zum spitzenlosen rundschleifen

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE567711C (de) * 1933-01-07 Hans Thoma Dr Ing Hydraulische Luenette
US1575968A (en) * 1921-07-20 1926-03-09 Bryant William Le Roy Grinding machine
US1709671A (en) * 1927-05-31 1929-04-16 Cincinnati Grinders Inc Grinding machinery
US3324607A (en) * 1964-08-13 1967-06-13 Super Cut Rotary grinding tool with interrupted abrasive helicoid
US3427755A (en) * 1965-12-20 1969-02-18 Brown & Sharpe Mfg Counter-force motivated back rest
DE1629236A1 (de) * 1966-11-26 1971-01-28 Peter Wolters Kratzenfabrik Un Verfahren zum Schleifen von Elastomeren und aehnlichen Werkstoffen
JPS4833062B1 (de) * 1970-12-15 1973-10-11
JPS5518383A (en) * 1978-07-28 1980-02-08 Toyoda Mach Works Ltd Numerical controller for controlling grinding
US4404772A (en) * 1981-09-14 1983-09-20 Litton Industrial Products, Inc. Cylindrical grinding machine
IT1145094B (it) * 1981-09-16 1986-11-05 Martinson Srl Lunetta autocentrante
US4663892A (en) * 1982-11-30 1987-05-12 Energy Adaptive Grinding, Inc. Force-controlled steadyrest system
CH664717A5 (de) * 1984-11-03 1988-03-31 Maag Zahnraeder & Maschinen Ag Verfahren und vorrichtung zur herstellung evolventenfoermiger zahnflanken.
SE8504090D0 (sv) * 1985-09-03 1985-09-03 Welin Berger Guy Sjelvcentrerande stoddocka
JPS62107949A (ja) * 1985-11-04 1987-05-19 Toyoda Mach Works Ltd 振れ止め装置を備えた研削盤
JPS62181802A (ja) * 1986-02-03 1987-08-10 Matsumoto Masamichi 研削機
JPS62228361A (ja) * 1986-03-27 1987-10-07 Tokai Rubber Ind Ltd 熱硬化性樹脂パイプの表面研摩方法およびそれに用いる装置
JPH0451959Y2 (de) * 1987-11-27 1992-12-07
JPH0673813B2 (ja) * 1988-04-02 1994-09-21 アミテック株式会社 研磨用成形工具と、その製造方法
JP2619497B2 (ja) * 1988-09-29 1997-06-11 豊田工機株式会社 端面測定装置を備えた研削装置
US5148827A (en) * 1991-11-26 1992-09-22 Delaware Capital Formation, Inc. Air-oil full hydraulic reservoir tank

Also Published As

Publication number Publication date
WO1992010331A1 (fr) 1992-06-25
DE69102772T2 (de) 1995-01-12
JPH06505924A (ja) 1994-07-07
ATE108114T1 (de) 1994-07-15
US5443411A (en) 1995-08-22
EP0560888A1 (de) 1993-09-22
DE69102772D1 (de) 1994-08-11
ES2059210T3 (es) 1994-11-01
FR2670150B1 (fr) 1995-04-07
FR2670150A1 (fr) 1992-06-12
AU9103091A (en) 1992-07-08

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