EP0281835B1 - Meuleuse à contrôle numérique - Google Patents

Meuleuse à contrôle numérique Download PDF

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Publication number
EP0281835B1
EP0281835B1 EP88102668A EP88102668A EP0281835B1 EP 0281835 B1 EP0281835 B1 EP 0281835B1 EP 88102668 A EP88102668 A EP 88102668A EP 88102668 A EP88102668 A EP 88102668A EP 0281835 B1 EP0281835 B1 EP 0281835B1
Authority
EP
European Patent Office
Prior art keywords
swivel arm
grinding machine
revolver
machine according
swivel
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
EP88102668A
Other languages
German (de)
English (en)
Other versions
EP0281835A1 (fr
Inventor
Rudolf Beyer
Roland Schemel
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.)
K JUNG GmbH
Original Assignee
K JUNG 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 K JUNG GmbH filed Critical K JUNG GmbH
Priority to AT88102668T priority Critical patent/ATE64879T1/de
Publication of EP0281835A1 publication Critical patent/EP0281835A1/fr
Application granted granted Critical
Publication of EP0281835B1 publication Critical patent/EP0281835B1/fr
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
    • B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
    • B24B53/06—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels
    • B24B53/065—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels having other than straight profiles, e.g. crowned
    • 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
    • B24B53/12—Dressing tools; Holders therefor

Definitions

  • the invention relates to a CNC-controlled grinding machine with a rotatingly driven grinding wheel, with at least one dressing tool which is movable relative to the grinding wheel, this tool having a cutting edge which engages the grinding wheel and has a substantially circular cross-sectional shape, and with a swivel arm which carries the dressing tool and which is in a Storage frame is pivotally mounted and can be rotated by controlled drive means about a CNC pivot axis passing through the center of the cutting edge.
  • This object is achieved in a generic grinding machine in that at least two dressing tools are attached to a revolver rotatably mounted on the swivel arm, and the axis of rotation of the revolver runs parallel to and at a distance from the CNC swivel axis in that the indexing of the revolver from the twisting movement of the Swivel arm is derived about its CNC swivel axis, and that for this purpose a recess is formed in the turret, into which a numerically controlled index pin which is axially displaceable in the bearing frame of the swivel arm can be inserted such that when the swivel arm is rotated, the turret held by the pin causes a relative rotary movement through which another dressing tool comes into the working position.
  • the required relative movement (dressing movement) between the dressing tool (e.g. a dressing diamond) and the grinding wheel can be generated either by the tool or by the grinding wheel or by both in combination, the movements controlled by CNC control devices with associated programs.
  • the longitudinal axis 2 of a dressing tool 3 forms one with the axis of rotation 4 of the grinding wheel Angle ⁇ 0, which depends on the profile shape to be created on the circumference of the grinding wheel. 1 shows three different positions of the dressing tool 3, each with different angles ⁇ 0.
  • the angle ⁇ 0 z. B. 90 °, ie the dressing tool is approximately perpendicular to the axis of rotation 4 of the grinding wheel 1.
  • other angles ⁇ 0 are set so that the dressing tool must be pivoted accordingly (see FIG. 1, the position of the two dressing tools 3 and 3 ⁇ ).
  • the cutting edge 5 of the dressing tool 3 has an essentially circular cross-sectional shape.
  • the pivot axis 6 runs through the center of the circle of the cutting edge 5. This ensures that there is no shape distortion on the dressing profile when the dressing tool 3 is pivoted.
  • the center point of the cutting edge 5, through which the swivel axis 6 of the dressing tool runs, follows the profile to be produced at an equidistant distance during the dressing process, this distance being equal to the radius of the circle producing the tip of the dressing tool.
  • the dressing tool 3 is further arranged so that its axis 2 includes an angle of ⁇ 1 (for example 5 °) with the radius 8 of the grinding wheel 1 directed towards the point of application 7 of the tool 3.
  • This arrangement of the dressing tool is called 3 with respect to the direction of rotation D of the grinding wheel 1 also "pulling".
  • the pivot axis 6 of the dressing tool 3 with respect to the grinding wheel circumference is not set exactly tangentially at the point of application 7, but at an angle of ⁇ 2 to the tangent. If ⁇ 1 and ⁇ 2 are chosen approximately the same, the center point and thus the center line of the tip 5 of the dressing tool coincide approximately with the pivot axis. As a result, when the dressing tool is pivoted, e.g. on a cylindrical outer peripheral part of the grinding wheel, the same projection of the circle determining the tip of the dressing tool is always effective, i.e. the distance a in Fig. 2a is retained. This avoids "ripple" on the grinding wheel surface to be dressed.
  • a swivel arm 12 is mounted in a bearing frame 11 so that it can pivot about the swivel axis 6 already mentioned by means of ball bearings 13.
  • the drive is CNC controlled so that precisely defined angular positions can be communicated to the swivel arm.
  • the storage rack 11 is in turn firmly connected to a machine table 17, not shown in detail, which can be adjusted in a manner known per se with respect to the grinding wheel 1 in at least two directions.
  • the swivel arm 12 has the shape of a crank.
  • a shaft 19 is rotatably arranged in a self-supporting manner and is fixedly connected to a revolver 20 at its free end.
  • three further dressing tools 21, 22, 23 are fixedly arranged in the turret 20, wherein each dressing tool can be clamped in its own tool holder 24, which in turn is aligned with the body of the turret 20.
  • the turret 20 is thus rotatable about the axis of the shaft 19, this axis running parallel to and at a distance from the pivot axis 6 of the pivot arm 12. Different dressing tools can thus be brought into position alternately on the grinding wheel 1.
  • the shaft 19 is firmly connected to a grooved washer 25, on the exposed rear side of which a recess is formed in the form of a cross groove 26, see FIGS. 3 and 8.
  • the shaft 19 is slidably displaceable in the end 18 of the swivel arm 12 and is biased into its normal position by a spring assembly 27 (to the left in FIG. 2b).
  • a centering toothing 29 is formed between the actual body of the revolver and an adjusting part 28 of the swivel arm to be described later. If the shaft 19 is moved out of its normal position (to the right in FIG. 2b) against the action of the spring assembly 27, the toothing 29 disengages so that the turret 20 and the dressing tools carried by it can be rotated.
  • an index pin 31 is slidably mounted against the pressure of a spring 32.
  • the pin 31 is connected to a piston 33 which is connected to a pressure medium, e.g. Compressed air can be acted on, so that the pin emerges from the storage rack 11 (to the right in FIG. 2b).
  • the index pin 31 can enter the cross groove 26 and thereby fix the washer 25 and with it the turret 20 relative to the storage rack 11.
  • the shaft 19 is displaced by the pin 31 striking the bottom of the cross groove, so that the toothing 29 disengages.
  • Fig. 3 the swivel arm is in its normal position.
  • the dressing tool 3 engages the grinding wheel 1.
  • the pivot axis 6 of the pivot arm 12 runs through the center of the circular tip 5 of the dressing tool 3.
  • the position of the index pin 31 and the cross groove 26 are indicated by dashed lines.
  • the turret 20 is pivotable in the direction of arrow R, the swivel arm 12 in the direction of arrow S.
  • the pivot arm 12 first reaches the position shown in FIG. 4, in which the index pin 31 enters an arm of the cross groove 26 and thereby fixes the turret 20 and releases the toothing 29.
  • the swivel arm 12 is still pivoted in the direction of arrow S when the turret 20 is fixed, as a result of which a relative rotation between the turret 20 and the swivel arm 12 is brought about.
  • the tool 21 takes the place of the tool 3, while the tool 3 assumes the former position of the tool 23.
  • the index pin 31 is withdrawn and the swivel arm is returned to its normal operating position.
  • the new dressing tool 21 is centered by the toothing 29.
  • the swivel arm 12 has a recess 35 in addition to the grooved washer 25, into which the remote-controlled index pin 31 can be inserted if necessary with the angular position of the swivel arm 12.
  • the swivel arm can be locked in the normal position with respect to its swivel drive without play, which enables a particularly precise dressing of the cylindrical outer surface of a grinding wheel.
  • FIG. 6 shows a dressing tool 3 that has been worn after dressing a grinding wheel.
  • the originally circular, dash-dotted "tip" of the dressing tool 3 has a wavy shape as a result of wear Take shape. If the latter remains within certain tolerances, for example within the circular arcs 5 ⁇ and 5 ⁇ shown in FIG. 6, the dressing tool 3 can continue to be used. However, a new adjustment is then required in order to bring the center of the arcs 5 ⁇ and 5 ⁇ into alignment with the swivel axis of the swivel arm 12. As can be seen from FIG. 6, the center point of the circular arc 5 is initially in register with the pivot axis 6.
  • the center of the circular arcs 5 ⁇ and 5 ⁇ , designated by the reference numeral 6 ⁇ , is shifted downward and rightward by ⁇ H and ⁇ S with respect to the center of the circular arc 5, designated by the reference numeral 6.
  • the dressing tool 3 has to be readjusted accordingly by ⁇ H and ⁇ S.
  • the device according to the invention is also able to carry out this readjustment automatically, which is explained below with reference to FIGS. 2b and 7 to 9.
  • FIG. 7 shows a view essentially rotated by 90 ° compared to FIG. 2b.
  • the adjustment part 28 of the swivel arm 12 already mentioned is loosely clamped to the rest of the swivel arm 12 by means of bolts 36, 37 (FIG. 2b) and springs 38, 39 and is therefore slightly movable relative to the rest of the swivel arm.
  • 7 and 9 - a straight line of balls 41 is arranged in corresponding grooves of parts 12 and 28, which overall form a linear ball guide and on the one hand a limited displacement of the adjusting part 28 the axis of the ball guide and on the other hand allow a limited pivoting about this axis, the maximum amount of pivoting depends on the space between parts 12 and 28.
  • the translatory shift mentioned takes place in FIG. 7 perpendicular to the plane of the drawing and in FIG. 2b in the plane of the drawing, that is to say from bottom to top or vice versa. Due to this mobility of the adjustment part 28, the deviations ⁇ H and ⁇ S explained in connection with FIG. 6 can be corrected, namely the deviation ⁇ H by means of translational adjustment of the adjustment part 28 along the axis of the ball guide and the deviation ⁇ S by pivoting the adjustment part 28 about this axis . Because of the spring assembly 27, the shaft 19 running with a little play in the swivel arm 12 can participate in these (slight) adjustment movements.
  • a shaft 42 is rotatably and axially immovably mounted in the swivel arm 12 and carries an eccentric 43 at its end which projects freely into the adjusting part 28.
  • the eccentric 43 lies against a cylindrical pin 44 arranged in the adjusting part 28, which in turn is supported on a threaded pin 45. If the shaft 42 is thus rotated, the adjusting part 28 (and thus the dressing tool 3) is displaced translationally relative to the rest of the swivel arm 12.
  • a threaded spindle 46 is rotatably mounted in the swivel arm 12 (see FIG. 7), on whose end facing the adjusting part 28 a stilt 47 is supported in a wobbling manner. This stilt 47 continues to be supported in a corresponding recess in the adjusting part 28. If the threaded spindle 46 is thus rotated, the associated axial displacement of the stilt 27 causes the adjusting part 28 to pivot about the axis of the ball guide.
  • a lever arm 48 or 49 is rotatably connected to the ends of the shaft 42 and the threaded spindle 46 protruding from the swivel arm 12, cf. 7 and 8. If the swivel arm 12 is pivoted about its swivel axis 6 in a CNC-controlled manner when the index pin 31 is extended (shown in broken lines in FIGS.
  • the lever arms 48, 49 can be brought to a stop against the pin 31, whereby in each case a rotary movement of the shaft 42 or the threaded spindle 46 can be triggered, which in turn can then be used to correct the deviations ⁇ H or ⁇ S in the manner described.
  • a protective cap is connected to the body of the turret 20, which extends freely over the adjusting part 28 and is flexibly supported on the swivel arm 12 with the interposition of a seal 52 in such a way that the protective hood 51 adjusts the adjusting movements of the turret 20 and the Adjustment part 28 is not hindered.
  • a spherical reference surface 54 which is designed as a laterally projecting stop 53, is arranged on the bearing frame 11 of the swivel arm 12 (which is arranged displaceably on the machine table) and, as indicated by the dash-dotted line 55, with the tip of the dressing tool 3 is aligned.
  • the stop 53 with its reference surface 54 is arranged on the storage rack 11 so that it can be adjusted in height, so that it can be adjusted with the dressing tool 3 can be precisely aligned.
  • the housing 57 of a sensor 58 With a grinding headstock 56, which surrounds the grinding wheel 1 in a known manner and serves as a protective hood, the housing 57 of a sensor 58 is connected, the sensing pin 59 of which, in a manner known per se, faces a flat surface 50 of the spherical reference surface 54.
  • the housing 57 is preferably also vertically displaceable on the box 56 so that it can be moved out of the way during normal operation of the grinding machine.
  • the height shift of the sensor 58 can be done automatically by a pressure medium or electromechanically.
  • the position of the diamond tip of the dressing tool 3 can be measured precisely in comparison to the reference surface 54 with the aid of the scanning pin 59 of the sensor 58 brought into the working position.
  • the dressing tool 3 is moved into the position shown in dash-dot lines in FIG. 10 by moving the storage rack 11.
  • the described dressing device can, as described, be arranged fixedly on the machine table 17 which can be moved in the usual manner. Then only the CNC-controlled swivel movement of the swivel arm 12 about its axis 6 is required for the described adjustment and adjustment movements, because the other movements can be carried out by the machine table.
  • the dressing device can also be "overhead", i.e. rotated downward by 180 ° and fastened directly to the grinding spindle box 56. In this case, two additional translational adjustment axes are required to carry out the dressing.
  • a circumferential dressing tool e.g. a diamond roller in which turret 20 are inserted.
  • stops e.g. a stop for a reference standard of a measuring device can be used.
  • the fine adjustment described carried out with the aid of the shaft 42 or the threaded spindle 46, can be used not only to adjust a dressing tool that is worn through wear, but also when a different turret 20 with other dressing tools is attached to the swivel arm 12.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)

Claims (15)

  1. Machine à meuler à commande numérique par calculateur, avec une meule (1) entraînée en rotation, avec au moins un dresse-meule (3) mobile relativement à la meule, ce dresse-meule ayant une tranche (5) à section droite sensiblement circulaire agissant sur la meule, et avec un bras pivotant (12) portant le dresse-meule qui est monté pour pivoter dans un support de palier (11) et qui peut tourner grâce à des moyens d'entraînement commandés autour d'un axe de pivotement (6) à commande numérique passant par le centre du cercle de la tranche caractérisé en ce que, sur une tourelle (20) montée tournante sur le bras pivotant (12) sont fixés au moins deux dresse-meule (3, 21), l'axe de rotation (19) de la tourelle s'étendant parallèlement à l'axe de pivotement (6) à commande numérique en étant espacé de lui, que le mouvement d'avance de la tourelle est dérivé du mouvement de giration du bras pivotant autour de l'axe de pivotement à commande numérique de celui-ci, et qu'à cet effet il est prévu dans la tourelle un évidement (26) dans lequel peut être introduite une broche d'indexation (31) déplaçable en sens axial dans le support de palier (11) du bras pivotant et commandée par commande numérique de telle sorte que, lorsque le bras pivotant tourne, la tourelle tenue par la broche effectue un mouvement relatif par suite duquel un autre dresse-meule vient en position de travail.
  2. Machine à meuler selon la revendication 1 caractérisée en ce que la tourelle (20) porte quatre dressemeule (3, 21, 22, 23) et l'évidement (26) prévu pour recevoir la broche d'indexation (31) a la configuration d'une rainure cruciforme.
  3. Machine à meuler selon la revendication 1 caractérisée en ce que la tourelle (20) est normalement verrouillée (29) avec le bras pivotant (12) par la pression d'un ressort (27) et, après son introduction dans l'évidement (26), la broche d'indexation (31) supprime ce verrouillage (29) de sorte que la tourelle peut avancer.
  4. Machine à meuler selon la revendication 1 caractérisée en ce que la tourelle (20) est montée sur une pièce d'ajustage (28) qui peut être déplacée sur le bras pivotant (12) dans deux directions (△H, △S) pour le réglage fin des dresse-meule (3, 21, 22, 23), en ce que ce mouvement de réglage est dérivé du mouvement de rotation du bras pivotant autour de son axe de pivotement à commande numérique (6) et en ce qu'il est prévu à cette fin des organes de réglage (42, 46) qui, lorsque le bras pivotant tourne, rencontrent des butées (31) et déclenchent par là même le mouvement de réglage.
  5. Machine à meuler selon la revendication 4 caractérisée en ce que les butées sont constituées par la broche d'indexation (31).
  6. Machine à meuler selon la revendication 4 caractérisée en ce que la pièce d'ajustage (28) prend appui sur le bras pivotant (12) par l'intermédiaire d'une glissière linéaire à billes (41) et d'un poussoir (47) pour pouvoir se déplacer en translation ainsi que pour pouvoir basculer.
  7. Machine à meuler selon la revendication 1 caractérisée en ce qu'il est prévu comme organe de réglage un excentrique (43) rotatif sous l'action duquel la pièce d'ajustage (28) peut coulisser le long de la glissière à billes (41).
  8. Machine à meuler selon la revendication 6 caractérisée en ce qu'il est prévu comme organe de réglage une broche filetée (46) au moyen de laquelle la pièce d'ajustage (28) peut être basculée autour de l'axe de la glissière à billes (41).
  9. Machine à meuler selon la revendication 7 ou 8 caractérisée en ce que sont fermement liés à l'excentrique (43) et à la broche filetée (46) des bras de levier (48, 49) qui, lorsque le bras pivotant (12) tourne, rencontrent la broche d'indexation (31).
  10. Machine à meuler selon la revendication 1, caractérisée par un trou (35) du bras pivotant (12) dans lequel peut être introduite la broche d'indexation (31) pour l'immobilisation du bras pivotant.
  11. Machine à meuler selon la revendication 1 caractérisée en ce que le support de palier (11) du bras pivotant (12) est disposé sur une table de machine-outil (17) déplaçable suivant deux axes de coordonnées.
  12. Machine à meuler selon la revendication 1 caractérisée en ce que le support de palier (11) du bras pivotant (12) est fixé sur un chariot qui est de son côté monté déplaçable suivant deux axes de coordonnées sur une poupée fixe porte-meule (56) de la machine à meuler.
  13. Machine à meuler selon la revendication 4 caractérisée en ce que sont disposés sur le support de palier (11) du bras pivotant (12), à la hauteur de l'axe de pivotement (6) à commande numérique, une surface de référence (54) et, sur la poupée fixe porte-meule (56) de la machine, un palpeur (58, 59), ce palpeur pouvant être mis à volonté en contact avec la surface de référence ou avec la tranche (5) du dresse-meule (3).
  14. Machine à meuler selon la revendication 13 caractérisée en ce que la surface de référence (54) et/ou le palpeur (58) sont réglables en hauteur.
  15. Procédé de détermination du déréglage du dresse-meule sur une machine à meuler conforme à la revendication 13 caractérisé en ce que, on détecte l'usure du dresse-meule par palpage à l'aide du palpeur des positions de la surface de référence et de la tranche du dresse-meule, on détermine par une rotation faite à ce moment du bras pivotant l'écart de la forme de la tranche par rapport à la forme circulaire, et on obtient ainsi des données pouvant être mises en mémoire pour le réglage fin du dresse-meule.
EP88102668A 1987-03-11 1988-02-24 Meuleuse à contrôle numérique Expired - Lifetime EP0281835B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88102668T ATE64879T1 (de) 1987-03-11 1988-02-24 Cnc-gesteuerte schleifmaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3707775 1987-03-11
DE3707775A DE3707775C2 (de) 1987-03-11 1987-03-11 CNC-gesteuerte Schleifmaschine mit einer Abrichtvorrichtung

Publications (2)

Publication Number Publication Date
EP0281835A1 EP0281835A1 (fr) 1988-09-14
EP0281835B1 true EP0281835B1 (fr) 1991-07-03

Family

ID=6322760

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88102668A Expired - Lifetime EP0281835B1 (fr) 1987-03-11 1988-02-24 Meuleuse à contrôle numérique

Country Status (4)

Country Link
EP (1) EP0281835B1 (fr)
JP (1) JPH0780122B2 (fr)
AT (1) ATE64879T1 (fr)
DE (1) DE3707775C2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5025592A (en) * 1988-05-09 1991-06-25 Brother Kogyo Kabushiki Kaisha Machine tool having workpiece machining dimension and tool length measuring functions
US5138799A (en) * 1991-04-12 1992-08-18 Bryant Grinder Corporation Probe positioning mechanism for a radius dresser
DE69200382T2 (de) * 1991-05-07 1995-03-23 Voumard Machines Co Sa Numerisch gesteuerte Schleifmaschine.
US6015335A (en) * 1997-12-17 2000-01-18 Memc Electronic Materials, Inc. Apparatus for dressing inside diameter saws
DE10214792B4 (de) * 2002-04-04 2004-05-06 Saint-Gobain Winter Diamantwerkzeuge Gmbh & Co. Kg Verfahren zum Schleifen von Profilen an Werkstücken

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE704226C (de) * 1936-05-24 1941-03-26 Herbert Lindner Vorrichtung zum Profilieren und Abrichten von ein- oder mehrprofiligen Formschleifscheiben
US2979971A (en) * 1960-05-27 1961-04-18 Warner Swasey Co Power indexed machine tool turret
GB916294A (en) * 1960-07-27 1963-01-23 Jones & Shipman A A Ltd Improvements relating to grinding wheels
DD96430A1 (fr) * 1972-04-07 1973-03-20
DD219142B5 (de) * 1983-11-09 1996-08-08 Niles Werkzeugmasch Gmbh Einrichtung zum Abrichten von Doppelkegelschleifkoerpern
US4603677A (en) * 1984-08-29 1986-08-05 Gile Richard H Orthogonal dressing of grinding wheels
JPH0224610Y2 (fr) * 1986-10-24 1990-07-05

Also Published As

Publication number Publication date
DE3707775C2 (de) 1996-03-07
DE3707775A1 (de) 1988-09-22
EP0281835A1 (fr) 1988-09-14
JPS63232979A (ja) 1988-09-28
ATE64879T1 (de) 1991-07-15
JPH0780122B2 (ja) 1995-08-30

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