EP0057298A2 - Machine for grinding the grooves of helicoidal cutters - Google Patents

Machine for grinding the grooves of helicoidal cutters Download PDF

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Publication number
EP0057298A2
EP0057298A2 EP81201400A EP81201400A EP0057298A2 EP 0057298 A2 EP0057298 A2 EP 0057298A2 EP 81201400 A EP81201400 A EP 81201400A EP 81201400 A EP81201400 A EP 81201400A EP 0057298 A2 EP0057298 A2 EP 0057298A2
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EP
European Patent Office
Prior art keywords
spindle
lever
machine according
grinding wheel
rotation
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.)
Withdrawn
Application number
EP81201400A
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German (de)
French (fr)
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EP0057298A3 (en
Inventor
Max Meili
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.)
AG fuer Automatisierung
Original Assignee
AG fuer Automatisierung
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 AG fuer Automatisierung filed Critical AG fuer Automatisierung
Publication of EP0057298A2 publication Critical patent/EP0057298A2/en
Publication of EP0057298A3 publication Critical patent/EP0057298A3/en
Withdrawn legal-status Critical Current

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    • 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
    • B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • B24B19/02—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding grooves, e.g. on shafts, in casings, in tubes, homokinetic joint elements
    • B24B19/04—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding grooves, e.g. on shafts, in casings, in tubes, homokinetic joint elements for fluting drill shanks

Definitions

  • the present invention relates to a machine for grinding the grooves of helical cutting tools, such as drills or milling cutters, comprising a workpiece spindle driven in a helical movement in front of at least one grinding wheel carried by a grinding wheel doll.
  • the helical drive device comprises a displacement cursor on two rectilinear orientable bars, this cursor being driven by the slide carrying the spindle, the displacement of the cursor ensuring reciprocally the spindle drive.
  • This device is relatively complicated and delicate.
  • the engagement and disengagement of the spindle requires the displacement of a considerable mass, because it is necessary to move a lower slide carrying the slide of the spindle and the device helical drive.
  • the present invention aims to achieve the helical drive by simpler means, also adjustable and simultaneously allowing to clear the spindle very simply.
  • the machine according to the invention is characterized in that the spindle is slidably mounted, but integral in rotation in a socket driven in rotation by a motor, in a support, this spindle being connected to a lever having means for modifying the position of its fulcrum and an arm of which is constantly applied against a cam driven in rotation by the same motor as said socket.
  • the spindle consists of two telescopic parts allowing the actuation of the clamp by displacement of the internal part and the adjustment of the length of the spindle by simple rotation of the external part.
  • a motor 1 driving by a belt 72, through a gear reducer 2, a shaft 3 and a cam-bell 4.
  • a pinion 5 driving, by means of a pinion 6, a pinion 7 secured to a socket 12 itself secured in rotation to the tool-holder spindle 8.
  • This spindle is axially movable and it is connected to a lever 9 by means of two links 11 and 11 '.
  • This lever 9 bears against a flat and vertical support face 10 by means of a roller 13 mounted on a vertical axis on a slide 73 capable of being moved and positioned along the arm 9.
  • a shape of this device is shown in detail in Figures 7 and 8.
  • the roller 13 is held in abutment against the surface 10 by a tension spring 64.
  • the lever 9 is provided with a roller 74 cooperating with the cam 4 and held in abutment against this cam by a spring 60 guided in a tube 59.
  • the lever 9 carries a link 26 whose end is shaped fork carries a roller 27 and is attached to the end of two arms 28 hinged about a horizontal axis 76 on the frame.
  • the roller 27 cooperates with a second bell-cam 29 mounted on a camshaft 30 driven, by means of a belt 75, by a second motor 31.
  • the spindle 8 is of adjustable length, as will be described in detail in connection with FIG. 6, and comprises a sliding bush 23 allowing the clamp of the spindle to be opened by means of a lever 24.
  • the bush 23 is controlled by one of the cams of the camshaft 30.
  • the sharpening tool 77 is supported, during sharpening, by a support 78 formed at the end of a shaft 33 slidably mounted in a ball bushing 34 keyed into a support 37 articulated around a horizontal axis 35 on a frame 79 and supported at the opposite end by a toggle 36 connected to an electromagnet 38 articulated on the frame 79.
  • the shaft 33 is connected by a link 39 to a lever 40 pivoted on the frame around an axis 80 and connected to the end of a bar 41 itself attached to a lever 42 pivoted on the frame around an axis 81 and the upper part of which, in the form of a fork, carries two rods 43 whose V-shaped ends come to bear on two pins 82 of the spindle 8.
  • the support against the pins 82 is provided by a tension spring 65 pulling on the bar 41.
  • a light 83 is provided at the end of the bar 41 to allow the lever 42 to pivot without driving the bar 41.
  • This lever 42 has indeed another function, that of driving a second bar 45 acting on a lifting member 46 pivoted about a horizontal axis 84 on the frame and provided with a boss 46 'supporting a vertically movable stud 47 intended to lift the grinding wheel holder, as will be described in relation to Figures 4 and 5.
  • the bar 45 also has a light 85 allowing the lifting device 46 to tilt freely to the left independently of the bar 45.
  • the part 46 is in fact connected by a second bar 56 to an electro -magnet 55 for actuating the lifting device 46 independently of the lever 42.
  • the point of attachment of the bar 45 to the lever 42 is produced by means of a sliding nut displaceable by means of a screw 54 along the lever 42. This makes it possible to modify the amplitude of the lifting of the grinding wheel as a function of the axial displacement of the spindle 8, according to the taper of the tool to be sharpened, as will be described later.
  • the grinding wheel 86 (FIGS. 4 and 5) is mounted on a grinding wheel spindle 44 driven by a motor 87 and mounted in a headstock 50 provided with a vertical slide 51 sliding in a frame 88.
  • the motor 87 and the frame 88 are mounted on a plate 52 resting on the frame 71 and mounted pivoting about a vertical axis 53 on a strip 66 along which the plate can be moved and positioned by means of a micro screw -metric 89.
  • the axis 53 coincides with the axis of the lifting stud 47 mounted in a ball bushing 68.
  • the stud 47 supports a lever 48 articulated around an axis 90 and which in turn supports the end mite with a micro-metric screw 49 integral with the slide 51.
  • the lifting of the stud 47 therefore has the effect of lifting the grinding spindle.
  • a tilting stop 67 keeps the lever 48 in the raised position so that the lifting device no longer has any effect on this lever 48. This stop 67 is used when the tool to be sharpened does not have a taper.
  • the spindle 8 is shown on a larger scale in FIG. 6.
  • This spindle is rotatably mounted in a frame 91 by means of two ball bearings 92 and 93.
  • the outer bush 12, secured to the drive pinion 7, is rotatably secured of a fluted tubular shaft 12 'by means of a key 94.
  • the fluted shaft 12' is screwed at 15 to a tubular part 14 in which can slide an assembly consisting of tubular parts 17 and 19 screwed at 18 and a tubular part 20, screwed to the part 19, the part 20 having a conical orifice for actuating the cone of the clamp 22 of the spindle.
  • This clamp is shown in the open position. The clamp tends to be kept closed by a spring 21 bearing on the part 14.
  • the lever 24 is pivoted about an axis 95 in the wall of the tube 14. It is provided with a roller 96 cooperating with the oblique face 23 'of the sliding sleeve 23 which controls the lever 24. This lever has a lug 24' engaging in a housing 97 of the part 17. The lever 24 therefore controls the assembly 17-19-20, that is that is to say the opening of the clamp 22.
  • the roller 96 has been pushed back by the bush 23 moved to the left, which has the effect of opening the clamp 22.
  • the spring 21, pressing on the part 14 closes the clamp by pushing on a shoulder of the part 19.
  • the threads 15 and 18 are identical, so that it is possible to make vary the length of the spindle by making rotate the tubular part 14 which has a nut 25 for this purpose.
  • the rotation of the part 14 has the effect of screwing or unscrewing the parts 12 ′ and 14 from one another.
  • the splined shaft 12 ′ being however fixed in rotation, it moves axially.
  • the parts 17 and 19 are screwed, respectively unscrewed from each other by the same value. This adjustment of the length of the spindle has no influence on the position of the socket 23.
  • FIGS. 7 and 8 An embodiment of the fulcrum of the lever 9 is shown in detail in FIGS. 7 and 8.
  • a slide made up of three parts 98, 99 and 100.
  • This slide is mounted on a screw 70 bearing on an elbow 101 of the lever 9 at its end.
  • the slide carries a vertical axis 62 passing through a longitudinal slot of the lever 9 and resting on a polished surface 102.
  • On the shaft 62 is rotatably mounted a rectangular stud 103 on which is in turn mounted a slide 61, with a certain axial play.
  • This slide is connected to the slide by a tension spring 69 which has the effect of eliminating any play in the position of the slide 61.
  • This slide 61 plays the role of the roller 13 of FIG. 1 and bears against the surface d 'Support 10 consisting of two plates 10 and 10a between which is fixed a permanent magnet 63 which aims to prevent the slide 61 from unintentionally peeling off its support surface.
  • the installation operates as follows: the lever 9 being in position 9 ', that is to say at the bottom of the cam 4, and the clamp 22 open, a helical cutting tool 77, which is will assume conical, is fixed in the clamp 22.
  • the clamp is opened by means of the sleeve 23 as already described.
  • the end of the tool 77 is on the axis 33.
  • the grinding wheel 86 is brought to the end of the tool 77.
  • the motor 1 starts to rotate, driving the spindle 8 in a helical movement thanks to the cam 4, the lever 9 pivoting on its fulcrum.
  • the support of the tool 78 exactly follows the movement of the spindle 8 because it is linked to it by the bar 41.
  • the bar 45 which moves with the spindle 8 has the effect of gradually lifting the grinding wheel 86 as and when measurement of the advance thereof on the tool 77, following the taper of the tool.
  • the electromagnet 55 is excited, which has the effect of disengaging the grinding wheel 86 from the tool by lifting it.
  • the electromagnet 38 is also excited, which has the effect of tilting the support 78 and releasing the tool 77.
  • the motor 31 then makes one revolution, which has the effect of pushing back the lever 9 by the cam 29, this lever 9 coming to occupy the position 9 ", since the roller 74 is lowered on the lower part of the cam 4.
  • one of the cams of the camshaft 30 controls the opening of the pliers by the socket 23, which makes it possible to release the tool 77 to replace it with a new tool and so on.
  • the amplitude of the lifting of the grinding wheel 86 is adjusted, as a function of the taper of the tool to be sharpened, by means of the screw 54.

Abstract

The machine comprises a workpiece-holding spindle (8) mounted slideably, but integral in rotation, in a sleeve (12) driven in rotation by a motor (1). It is connected to a lever (9) controlled by a cam (4) in order to obtain a helical movement. The bearing point (13) of the lever (9) can be displaced in order to modify the gradient of the helix. The opening of the chuck of the spindle is controlled by a sliding sleeve (23) acting on a lever (24). The spindle is linked kinematically, in its axial movement, to a device for lifting the wheel for grinding conical tools. <IMAGE>

Description

La présente invention a pour objet une machine à rectifier les rainures d'outils de coupe hélicoïdaux, tels que forets ou fraises, comprenant une broche porte-pièce entraînée selon un mouvement hélicoïdal devant au moins une meule portée par une poupée porte-meule.The present invention relates to a machine for grinding the grooves of helical cutting tools, such as drills or milling cutters, comprising a workpiece spindle driven in a helical movement in front of at least one grinding wheel carried by a grinding wheel doll.

On connaît des machines comportant un dispositif pour entraîner la broche selon un mouvement hélicoïdal. Une machine de ce type est décrite dans le brevet CH 553 032. Le dispositif d'entraînement hélicoïdal comprend un curseur de déplaçant sur deux barres rectilignes orientables, ce curseur étant entraîné par la coulisse portant la broche, le déplacement du curseur assurant réciproquement l'entraînement en rotation de la broche. Ce dispositif est relativement compliqué et délicat. En outre, l'engagement et le dégagement de la broche nécessitent le déplacement d'une masse considérable, car il faut déplacer une coulisse inférieure portant la coulisse de la broche et le dispositif d'entraînement hélicoïdal.There are known machines comprising a device for driving the spindle in a helical movement. A machine of this type is described in patent CH 553,032. The helical drive device comprises a displacement cursor on two rectilinear orientable bars, this cursor being driven by the slide carrying the spindle, the displacement of the cursor ensuring reciprocally the spindle drive. This device is relatively complicated and delicate. In addition, the engagement and disengagement of the spindle requires the displacement of a considerable mass, because it is necessary to move a lower slide carrying the slide of the spindle and the device helical drive.

La présente invention a pour but de réaliser l'entraînement hélicoïdal par des moyens plus simples, également réglables et permettant simultanément de dégager la broche très simplement.The present invention aims to achieve the helical drive by simpler means, also adjustable and simultaneously allowing to clear the spindle very simply.

La machine selon l'invention est caractérisée par le fait que la broche est montée coulissante, mais solidaire en rotation dans une douille entraînée en rotation par un moteur, dans un support, cette broche étant reliée à un levier présentant des moyens pour modifier la position de son point d'appui et dont un bras est appliqué constamment contre une came entraînée en rotation par le même moteur que ladite douille.The machine according to the invention is characterized in that the spindle is slidably mounted, but integral in rotation in a socket driven in rotation by a motor, in a support, this spindle being connected to a lever having means for modifying the position of its fulcrum and an arm of which is constantly applied against a cam driven in rotation by the same motor as said socket.

Seule la broche se déplace, son support étant fixe, de sorte que la masse à déplacer est faible. Le réglage de la pente de l'hélice s'effectue simplement en déplaçant le point d'appui du levier, ce qui a pour effet de modifier la longueur du bras de levier agissant sur la broche.Only the spindle moves, its support being fixed, so that the mass to be moved is small. The propeller slope is adjusted simply by moving the fulcrum of the lever, which has the effect of modifying the length of the lever arm acting on the spindle.

Pour dégager la broche, il suffit d'agir sur le levier. Ceci peut se faire simplement et automatiquement au moyen d'une came.To release the spindle, simply act on the lever. This can be done simply and automatically by means of a cam.

Selon une forme d'exécution avantageuse de l'invention, la broche est constituée de deux parties télescopiques permettant l'actionnement de la pince par déplacement de la partie intérieure et le réglage de la longueur de la broche par simple rotation de la partie extérieure.According to an advantageous embodiment of the invention, the spindle consists of two telescopic parts allowing the actuation of the clamp by displacement of the internal part and the adjustment of the length of the spindle by simple rotation of the external part.

Le dessin annexé représente, à titre d'exemple, une forme d'exécution de l'invention.

  • La figure 1 représente une vue en plan de la broche porte-outils et de ses moyens de commande.
  • La figure 2 en représente une vue en élévation de face.
  • La figure 3 représente une vue en élévation de côté de la broche porte-outil et du dispositif d'appui de l'outil.
  • La figure 4 représente une vue en élévation du porte-meule.
  • La figure 5 représente une vue en plan de ce même porte-meule.
  • La figure 6 représente une vue de détail et en demi- coupe de la broche porte-outil.
  • La figure 7 représente une vue en plan et en coupe du point d'appui du levier de commande de la broche.
  • La figure 8 représente une vue en coupe selon VIII-VIII de la figure 7.
The accompanying drawing shows, by way of example, an embodiment of the invention.
  • Figure 1 shows a plan view of the tool spindle and its control means.
  • Figure 2 shows a front elevation view.
  • Figure 3 shows a side elevational view of the tool spindle and the tool support device.
  • Figure 4 shows an elevational view of the grinding wheel holder.
  • FIG. 5 represents a plan view of this same grinding wheel holder.
  • FIG. 6 represents a detailed and half-section view of the tool-holder spindle.
  • Figure 7 shows a plan view and in section of the fulcrum of the spindle control lever.
  • FIG. 8 represents a sectional view along VIII-VIII of FIG. 7.

On se réfère aux figures 1 et 2. Sur un bâti 71 est monté un moteur 1 entraînant par une courroie 72, à travers un réducteur à engrenage 2, un arbre 3 et une came-cloche 4. Sur l'arbre 3 est monté un pignon 5 entraînant, par l'intermédiaire d'un pignon 6, un pignon 7 solidaire d'une douille 12 elle-même solidaire en rotation de la broche porte-outil 8. Cette broche est mobile axialement et elle est reliée à un levier 9 par l'intermédiaire de deux biellettes 11 et 11'. Ce levier 9 s'appuie contre une face d'appui 10 plane et verticale par l'intermédiaire d'un galet 13 monté sur un axe vertical sur un coulisseau 73 susceptible d'être déplacé et positionné le long du bras 9. Une forme d'exécution de ce dispositif est représentée en détail aux figures 7 et 8. Le galet 13 est maintenu en appui contre la surface 10 par un ressort de traction 64. A son autre extrémité le levier 9 est muni d'un galet 74 coopérant avec la came 4 et maintenu en appui contre cette came par un ressort 60 guidé dans un tube 59. Entre son point d'appui et le point d'attache de la broche 8, le levier 9 porte une biellette 26 dont l'extrémité en forme de fourche porte un galet 27 et est attaché à l'extrémité de deux bras 28 articulés autour d'un axe horizontal 76 sur le bâti. Le galet 27 coopère avec une seconde came-cloche 29 montée sur un arbre à cames 30 entraîné, par l'intermédiaire d'une courroie 75, par un second moteur 31.Referring to Figures 1 and 2. On a frame 71 is mounted a motor 1 driving by a belt 72, through a gear reducer 2, a shaft 3 and a cam-bell 4. On the shaft 3 is mounted a pinion 5 driving, by means of a pinion 6, a pinion 7 secured to a socket 12 itself secured in rotation to the tool-holder spindle 8. This spindle is axially movable and it is connected to a lever 9 by means of two links 11 and 11 '. This lever 9 bears against a flat and vertical support face 10 by means of a roller 13 mounted on a vertical axis on a slide 73 capable of being moved and positioned along the arm 9. A shape of this device is shown in detail in Figures 7 and 8. The roller 13 is held in abutment against the surface 10 by a tension spring 64. At its other end the lever 9 is provided with a roller 74 cooperating with the cam 4 and held in abutment against this cam by a spring 60 guided in a tube 59. Between its fulcrum and the point of attachment of the spindle 8, the lever 9 carries a link 26 whose end is shaped fork carries a roller 27 and is attached to the end of two arms 28 hinged about a horizontal axis 76 on the frame. The roller 27 cooperates with a second bell-cam 29 mounted on a camshaft 30 driven, by means of a belt 75, by a second motor 31.

La broche 8 est de longueur réglable, comme ceci sera décrit en détail en relation avec la figure 6, et comprend une douille coulissante 23 permettant d'ouvrir la pince de la broche par l'intermédiaire d'un levier 24. La douille 23 est commandée par l'une des cames de l'arbre porte-cames 30.The spindle 8 is of adjustable length, as will be described in detail in connection with FIG. 6, and comprises a sliding bush 23 allowing the clamp of the spindle to be opened by means of a lever 24. The bush 23 is controlled by one of the cams of the camshaft 30.

L'outil à affûter 77 est soutenu, pendant l'affûtage, par un support 78 formé à l'extrémité d'un arbre 33 monté coulissant dans une douille à billes 34 claveté dans un support 37 articulé autour d'un axe horizontal 35 sur un bâti 79 et soutenu à l'extrémité opposée par une genouillère 36 reliée à un électro-aimant 38 articulé sur le bâti 79. L'arbre 33 est relié par une biellette 39 à un levier 40 pivoté sur le bâti autour d'un axe 80 et relié à l'extrémité d'une barre 41 elle-même attachée à un levier 42 pivoté sur le bâti autour d'un axe 81 et dont la partie supérieure, en forme de fourche, porte deux biellettes 43 dont les extrémités en V viennent s'appuyer sur deux tétons 82 de la broche 8. L'appui contre les tétons 82 est assuré par un ressort de traction 65 tirant sur la barre 41. Une lumière 83 est prévue à l'extrémité de la barre 41 pour permettre au levier 42 de pivoter sans entraîner la barre 41. Ce levier 42 a en effet une autre fonction, celle d'entraîner une seconde barre 45 agissant sur un organe de levage 46 pivoté autour d'un axe horizontal 84 sur le bâti et muni d'un bossage 46' soutenant un plot mobile verticalement 47 destiné à soulever le porte-meule, comme ceci sera décrit en relation avec les figures 4 et 5. En son point d'attache au dispositif de levage 46, la barre 45 présente également une lumière 85 permettant au dispositif de levage 46 de basculer librement vers la gauche indépendamment de la barre 45. La pièce 46 est en effet reliée par une seconde barre 56 à un électro-aimant 55 permettant d'actionner le dispositif de levage 46 indépendamment du levier 42.The sharpening tool 77 is supported, during sharpening, by a support 78 formed at the end of a shaft 33 slidably mounted in a ball bushing 34 keyed into a support 37 articulated around a horizontal axis 35 on a frame 79 and supported at the opposite end by a toggle 36 connected to an electromagnet 38 articulated on the frame 79. The shaft 33 is connected by a link 39 to a lever 40 pivoted on the frame around an axis 80 and connected to the end of a bar 41 itself attached to a lever 42 pivoted on the frame around an axis 81 and the upper part of which, in the form of a fork, carries two rods 43 whose V-shaped ends come to bear on two pins 82 of the spindle 8. The support against the pins 82 is provided by a tension spring 65 pulling on the bar 41. A light 83 is provided at the end of the bar 41 to allow the lever 42 to pivot without driving the bar 41. This lever 42 has indeed another function, that of driving a second bar 45 acting on a lifting member 46 pivoted about a horizontal axis 84 on the frame and provided with a boss 46 'supporting a vertically movable stud 47 intended to lift the grinding wheel holder, as will be described in relation to Figures 4 and 5. At its point of attachment to the lifting device 46, the bar 45 also has a light 85 allowing the lifting device 46 to tilt freely to the left independently of the bar 45. The part 46 is in fact connected by a second bar 56 to an electro -magnet 55 for actuating the lifting device 46 independently of the lever 42.

Le point d'attache de la barre 45 au levier 42 est réalisé au moyen d'un écrou coulissant déplaçable au moyen d'une vis 54 le long du levier 42. Ceci permet de modifier l'amplitude du levage de la meule en fonction du déplacement axial de la broche 8, selon la conicité de l'outil à affûter, comme ceci sera décrit plus loin.The point of attachment of the bar 45 to the lever 42 is produced by means of a sliding nut displaceable by means of a screw 54 along the lever 42. This makes it possible to modify the amplitude of the lifting of the grinding wheel as a function of the axial displacement of the spindle 8, according to the taper of the tool to be sharpened, as will be described later.

La meule 86 (figures 4 et 5) est montée sur une broche porte-meule 44 entraînée par un moteur 87 et monté dans une poupée 50 munie d'une coulisse verticale 51 coulissant dans un bâti 88.The grinding wheel 86 (FIGS. 4 and 5) is mounted on a grinding wheel spindle 44 driven by a motor 87 and mounted in a headstock 50 provided with a vertical slide 51 sliding in a frame 88.

Le moteur 87 et le bâti 88 sont montés sur un plateau 52 reposant sur le bâti 71 et monté pivotant autour d'un axe vertical 53 sur une réglette 66 le long de laquelle le plateau peut être déplacé et positionné au moyen d'une vis micro-métrique 89. L'axe 53 coïncide avec l'axe du plot de levage 47 monté dans une douille à billes 68. Le plot 47 soutient un levier 48 articulé autour d'un axe 90 et qui soutient à son tour l'extrémité d'une vis micro-métrique 49 solidaire de la coulisse 51. Le soulèvement du plot 47 a donc pour effet de soulever la broche porte-meule. Une butée basculante 67 permet de maintenir le levier 48 en position élevée de telle sorte que le dispositif de levage n'a plus d'effet sur ce levier 48. Cette butée 67 est utilisée lorsque l'outil à affûter ne présente pas de conicité.The motor 87 and the frame 88 are mounted on a plate 52 resting on the frame 71 and mounted pivoting about a vertical axis 53 on a strip 66 along which the plate can be moved and positioned by means of a micro screw -metric 89. The axis 53 coincides with the axis of the lifting stud 47 mounted in a ball bushing 68. The stud 47 supports a lever 48 articulated around an axis 90 and which in turn supports the end mite with a micro-metric screw 49 integral with the slide 51. The lifting of the stud 47 therefore has the effect of lifting the grinding spindle. A tilting stop 67 keeps the lever 48 in the raised position so that the lifting device no longer has any effect on this lever 48. This stop 67 is used when the tool to be sharpened does not have a taper.

La broche 8 est représentée à plus grande échelle à la figure 6. Cette broche est montée rotativement dans un bâti 91 au moyen de deux roulements à billes 92 et 93. La douille extérieure 12, solidaire du pignon d'entraînement 7, est rotativement solidaire d'un arbre tubulaire cannelé 12' au moyen d'une clavette 94. L'arbre cannelé 12' est vissé en 15 à une pièce tubulaire 14 dans laquelle peut coulisser un ensemble constitué des pièces tubulaires 17 et 19 vissées en 18 et d'une pièce tubulaire 20, vissée à la pièce 19, la pièce 20 présentant un orifice conique pour l'actionnement du cône de la pince 22 de la broche. Cette pince est représentée en position ouverte. La pince a tendance à être maintenue fermée par un ressort 21 prenant appui sur la pièce 14. Le levier 24 est pivoté autour d'un axe 95 dans la paroi du tube 14. Il est muni d'un galet 96 coopérant avec la face oblique 23' de la douille coulissante 23 qui commande le levier 24. Ce levier présente un ergot 24' s'engageant dans un logement 97 de la partie 17. Le levier 24 commande donc l'ensemble 17-19-20, c'est-à-dire l'ouverture de la pince 22. Dans la position représentée au dessin, le galet 96 a été repoussé par la douille 23 déplacée vers la gauche, ce qui a pour effet d'ouvrir la pince 22. Lorsque la douille 23 est déplacée vers la droite, le ressort 21, s'appuyant sur la pièce 14, ferme la pince en poussant sur un épaulement de la pièce 19. Les pas de vis 15 et 18 sont identiques, de telle sorte qu'il est possible de faire varier la longueur de la broche en faisant tourner la partie tubulaire 14 qui présente à cet effet un écrou 25. La rotation de la partie 14 a pour effet de visser ou de dévisser l'une de l'autre les parties 12' et 14. L'arbre cannelé 12' étant toutefois fixe en rotation, il se déplace axialement. Les pièces 17 et 19 se vissent, respectivement se dévissent l'une de l'autre de la même valeur. Ce réglage de la longueur de la broche n'a pas d'influence sur la position de la douille 23. Il est ainsi non seulement possible de modifier la position de la broche en fonction de l'outil à affûter, sans déplacer le support de cette broche, mais il est également possible de relier la douille 23 à un levier de commande actionné par l'une des cames de l'arbre porte-cames 30 pour obtenir une commande automatique de la pince.The spindle 8 is shown on a larger scale in FIG. 6. This spindle is rotatably mounted in a frame 91 by means of two ball bearings 92 and 93. The outer bush 12, secured to the drive pinion 7, is rotatably secured of a fluted tubular shaft 12 'by means of a key 94. The fluted shaft 12' is screwed at 15 to a tubular part 14 in which can slide an assembly consisting of tubular parts 17 and 19 screwed at 18 and a tubular part 20, screwed to the part 19, the part 20 having a conical orifice for actuating the cone of the clamp 22 of the spindle. This clamp is shown in the open position. The clamp tends to be kept closed by a spring 21 bearing on the part 14. The lever 24 is pivoted about an axis 95 in the wall of the tube 14. It is provided with a roller 96 cooperating with the oblique face 23 'of the sliding sleeve 23 which controls the lever 24. This lever has a lug 24' engaging in a housing 97 of the part 17. The lever 24 therefore controls the assembly 17-19-20, that is that is to say the opening of the clamp 22. In the position shown in the drawing, the roller 96 has been pushed back by the bush 23 moved to the left, which has the effect of opening the clamp 22. When the bush 23 is moved to the right, the spring 21, pressing on the part 14, closes the clamp by pushing on a shoulder of the part 19. The threads 15 and 18 are identical, so that it is possible to make vary the length of the spindle by making rotate the tubular part 14 which has a nut 25 for this purpose. The rotation of the part 14 has the effect of screwing or unscrewing the parts 12 ′ and 14 from one another. The splined shaft 12 ′ being however fixed in rotation, it moves axially. The parts 17 and 19 are screwed, respectively unscrewed from each other by the same value. This adjustment of the length of the spindle has no influence on the position of the socket 23. It is thus not only possible to modify the position of the spindle according to the tool to be sharpened, without moving the support of this pin, but it is also possible to connect the sleeve 23 to a control lever actuated by one of the cams of the camshaft 30 to obtain automatic control of the clamp.

Une forme d'exécution du point d'appui du levier 9 est représentée en détail aux figures 7 et 8. Sur le levier 9, en forme de fourche 9a, 9b, est monté un coulisseau constitué de trois pièces 98, 99 et 100. Ce coulisseau est monté sur une vis 70 prenant appui sur un coude 101 du levier 9 à son extrémité. Le coulisseau porte un axe vertical 62 traversant une fente longitudinale du levier 9 et s'appuyant sur une surface polie 102. Sur l'arbre 62 est monté rotativement un plot rectangulaire 103 sur lequel est montée à son tour une glissière 61, avec un certain jeu axial. Cette glissière est reliée au coulisseau par un ressort de traction 69 qui a pour effet d'éliminer tout jeu dans la position de la glissière 61. Cette glissière 61 joue le rôle du galet 13 de la figure 1 et s'appuie contre la surface d'appui 10 constituée de deux plaquettes 10 et 10a entre lesquelles est fixé un aimant permanent 63 qui a pour but d'empêcher la glissière 61 de se décoller intempestivement de sa surface d'appui.An embodiment of the fulcrum of the lever 9 is shown in detail in FIGS. 7 and 8. On the lever 9, in the form of a fork 9a, 9b, is mounted a slide made up of three parts 98, 99 and 100. This slide is mounted on a screw 70 bearing on an elbow 101 of the lever 9 at its end. The slide carries a vertical axis 62 passing through a longitudinal slot of the lever 9 and resting on a polished surface 102. On the shaft 62 is rotatably mounted a rectangular stud 103 on which is in turn mounted a slide 61, with a certain axial play. This slide is connected to the slide by a tension spring 69 which has the effect of eliminating any play in the position of the slide 61. This slide 61 plays the role of the roller 13 of FIG. 1 and bears against the surface d 'Support 10 consisting of two plates 10 and 10a between which is fixed a permanent magnet 63 which aims to prevent the slide 61 from unintentionally peeling off its support surface.

L'installation fonctionne de la manière suivante : le levier 9 étant dans la position 9', c'est-à-dire au bas de la came 4, et la pince 22 ouverte, un outil de coupe hélicoïdal 77, que l'on supposera conique, est fixé dans la pince 22. La pince est ouverte au moyen de la douille 23 comme déjà décrit. L'extrémité de l'outil 77 est sur l'axe 33. La meule 86 est amenée à l'extrémité de l'outil 77. Le moteur 1 se met à tourner en entraînant la broche 8 dans un mouvement hélicoïdal grâce à la came 4, le levier 9 pivotant sur son point d'appui. L'appui de l'outil 78 suit exactement le déplacement de la broche 8 car il lui est lié par la barre 41. La barre 45, qui se déplace avec la broche 8 a pour effet de soulever progressivement la meule 86 au fur et à mesure de l'avance de celle-ci sur l'outil 77, en suivant la conicité de l'outil. Une fois arrivé à la base de l'outil, l'électro-aimant 55 est excité, ce qui a pour effet de dégager la meule 86 de l'outil en la soulevant. L'électro-aimant 38 est également excité, ce qui a pour effet de faire basculer l'appui 78 et de dégager l'outil 77. Le moteur 31 effectue alors un tour, ce qui a pour effet de repousser en arrière le levier 9 par la came 29, ce levier 9 venant occuper la position 9", étant donné que le galet 74 est redescendu sur la partie basse de la came 4. Simultanément, l'une des cames de l'arbre à cames 30 commande l'ouverture de la pince par la douille 23, ce qui permet de dégager l'outil 77 pour le remplacer par un nouvel outil et ainsi de suite.The installation operates as follows: the lever 9 being in position 9 ', that is to say at the bottom of the cam 4, and the clamp 22 open, a helical cutting tool 77, which is will assume conical, is fixed in the clamp 22. The clamp is opened by means of the sleeve 23 as already described. The end of the tool 77 is on the axis 33. The grinding wheel 86 is brought to the end of the tool 77. The motor 1 starts to rotate, driving the spindle 8 in a helical movement thanks to the cam 4, the lever 9 pivoting on its fulcrum. The support of the tool 78 exactly follows the movement of the spindle 8 because it is linked to it by the bar 41. The bar 45, which moves with the spindle 8 has the effect of gradually lifting the grinding wheel 86 as and when measurement of the advance thereof on the tool 77, following the taper of the tool. Once arrived at the base of the tool, the electromagnet 55 is excited, which has the effect of disengaging the grinding wheel 86 from the tool by lifting it. The electromagnet 38 is also excited, which has the effect of tilting the support 78 and releasing the tool 77. The motor 31 then makes one revolution, which has the effect of pushing back the lever 9 by the cam 29, this lever 9 coming to occupy the position 9 ", since the roller 74 is lowered on the lower part of the cam 4. Simultaneously, one of the cams of the camshaft 30 controls the opening of the pliers by the socket 23, which makes it possible to release the tool 77 to replace it with a new tool and so on.

L'amplitude du levage de la meule 86 est ajustée, en fonction de la conicité de l'outil à affûter, au moyen de la vis 54.The amplitude of the lifting of the grinding wheel 86 is adjusted, as a function of the taper of the tool to be sharpened, by means of the screw 54.

Avec une deuxième meule on peut procéder simultanéement au détalonnage, comme décrit dans un brevet antérieur de la déposante. La position de la meule, respectivement des meules, en fonction de la pente de l'hélice de l'outil à affûter, s'effectue par la rotation du plateau 52 autour de l'axe 53.With a second grinding wheel, it is possible to simultaneously carry out the calibration, as described in an earlier patent of the applicant. The position of the grinding wheel, respectively ment of the grinding wheels, as a function of the slope of the propeller of the tool to be sharpened, is effected by the rotation of the plate 52 around the axis 53.

Claims (10)

1. Machine à rectifier les rainures d'outils de coupe hélicoïdaux, comprenant une broche porte-pièce entraînée selon un mouvement hélicoïdal devant au moins une meule portée par une poupée porte-meule, caractérisée par le fait que la broche (8) est montée coulissante mais solidaire en rotation dans une douille (12) entraînée en rotation par un moteur, dans un support, cette broche étant reliée à un levier (9) présentant des moyens pour modifier la position de son point d'appui (13) et dont un bras est appliqué constamment contre une came (4) entraînée en rotation par le même moteur que ladite douille (12).1. Machine for grinding the grooves of helical cutting tools, comprising a workpiece spindle driven in a helical movement in front of at least one grinding wheel carried by a grinding wheel headstock, characterized in that the spindle (8) is mounted sliding but integral in rotation in a socket (12) driven in rotation by a motor, in a support, this pin being connected to a lever (9) having means for modifying the position of its fulcrum (13) and of which an arm is constantly applied against a cam (4) driven in rotation by the same motor as said bush (12). 2. Machine selon la revendication 1, caractérisée par le fait que les moyens pour modifier la position du point d'appui du levier sont constitués par un galet (13) monté sur un support déplaçable le long du levier, par une surface d'appui (10) pour le galet et un ressort attaché au levier pour maintenir le galet en appui contre ladite surface d'appui.2. Machine according to claim 1, characterized in that the means for modifying the position of the fulcrum of the lever consist of a roller (13) mounted on a support movable along the lever, by a bearing surface (10) for the roller and a spring attached to the lever to keep the roller in abutment against said bearing surface. 3. Machine selon la revendication 2, caractérisée par le fait que la surface d'appui (10) est un plan vertical parallèle au levier (9) en position basse extrême sur la came (4).3. Machine according to claim 2, characterized in that the bearing surface (10) is a vertical plane parallel to the lever (9) in the extreme low position on the cam (4). 4. Machine selon la revendication 1, caractérisée par le fait qu'elle comporte une deuxième came (29) coopérant avec le levier en fin d'usinage pour assurer le recul de la broche.4. Machine according to claim 1, characterized in that it comprises a second cam (29) cooperating with the lever at the end of machining to ensure the retraction of the spindle. 5. Machine selon la revendication 1, caractérisée par le fait que la broche comprend une partie tubulaire (12', 14) dans laquelle est monté un arbre coulissant et solidaire en rotation, maintenu en arrière par un ressort et coopérant avec un levier (24) pivoté dans la paroi de la partie tubulaire (14) et dont un bras coopère avec une rampe d'une douille extérieure (23) coulissante de l'arbre coulissant agissant sur le cône de la pince de la broche, de telle sorte que le déplacement de la douille coulissante (23) entraîne l'ouverture de la pince.5. Machine according to claim 1, characterized in that the spindle comprises a tubular part (12 ', 14) in which is mounted a sliding shaft and integral in rotation, held behind by a spring and cooperating with a lever (24) pivoted in the wall of the tubular part (14) and one arm of which cooperates with a ramp of an external sleeve (23) sliding from the sliding shaft acting on the cone of the pliers the spindle, so that the displacement of the sliding sleeve (23) causes the opening of the clamp. 6. Machine selon la revendication 5, caractérisée par le fait que la partie tubulaire (12', 14) et l'arbre coulissant (17, 19) sont chacun en deux parties vissées l'une dans l'autre avec un pas de vis identique, de telle sorte qu'il est possible de modifier la longueur de la broche en rapport avec la longueur de l'outil à rectifier, sans déplacer la broche elle-même, en faisant tourner la partie mâle (14) de la partie tubulaire de la broche.6. Machine according to claim 5, characterized in that the tubular part (12 ', 14) and the sliding shaft (17, 19) are each in two parts screwed into each other with a screw pitch identical, so that it is possible to modify the length of the spindle in relation to the length of the tool to be ground, without moving the spindle itself, by rotating the male part (14) of the tubular part of the spindle. 7. Machine selon la revendication 1, caractérisée par le fait qu'elle comprend en outre un appui de travail (33) pour l'outil à rectifier, cet appui étant monté coulissant dans l'axe de la broche et relié mécaniquement à la broche de telle sorte qu'il se déplace avec celle-ci.7. Machine according to claim 1, characterized in that it further comprises a working support (33) for the tool to be ground, this support being slidably mounted in the axis of the spindle and mechanically connected to the spindle so that it moves with it. 8. Machine selon la revendication 7, caractérisée par le fait que l'appui de travail est en outre monté basculant.8. Machine according to claim 7, characterized in that the working support is also pivotally mounted. 9. Machine selon la revendication 1, caractérisée par le fait que la poupée porte-meule (50) est montée coulissante verticalement et que la broche (8) est reliée, par un système à leviers, réglable, à un dispositif de levage (46, 47) de la poupée porte-meule, permettant d'effectuer un rectifiage conique.9. Machine according to claim 1, characterized in that the grinding wheel headstock (50) is slidably mounted vertically and that the spindle (8) is connected, by a lever system, adjustable, to a lifting device (46 , 47) of the grinding wheel headstock, enabling conical grinding to be carried out. 10. Machine selon la revendication 9, caractérisée par le fait que le dispositif de levage (46, 47) est en . outre relié à un dispositif d'actionnement (55, 56) assurant l'engagement et le dégagement de la meule.10. Machine according to claim 9, characterized in that the lifting device (46, 47) is in. further connected to an actuating device (55, 56) ensuring the engagement and disengagement of the grinding wheel.
EP81201400A 1981-01-29 1981-12-29 Machine for grinding the grooves of helicoidal cutters Withdrawn EP0057298A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH589/81 1981-01-29
CH58981A CH643476A5 (en) 1981-01-29 1981-01-29 GRINDING MACHINE FOR HELICOID CUTTING TOOLS.

Publications (2)

Publication Number Publication Date
EP0057298A2 true EP0057298A2 (en) 1982-08-11
EP0057298A3 EP0057298A3 (en) 1983-04-27

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ID=4190496

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81201400A Withdrawn EP0057298A3 (en) 1981-01-29 1981-12-29 Machine for grinding the grooves of helicoidal cutters

Country Status (4)

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EP (1) EP0057298A3 (en)
JP (1) JPS57144656A (en)
CH (1) CH643476A5 (en)
SU (1) SU1058493A3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105834898A (en) * 2016-05-20 2016-08-10 东莞市鸿金顺机械制造有限公司 Intelligent double-sided grinding head assembly of vertical high-precision high-speed grinding machine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH425518A (en) * 1963-06-14 1966-11-30 Guehring Gottlieb Machine for the simultaneous grinding of the grooves and the relief grinding of twist drills
NL6714159A (en) * 1967-10-18 1969-04-22
DE2053506A1 (en) * 1970-10-31 1972-05-25 V Nauschno I Instr Grinding machine for making grooves in round parts

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH425518A (en) * 1963-06-14 1966-11-30 Guehring Gottlieb Machine for the simultaneous grinding of the grooves and the relief grinding of twist drills
NL6714159A (en) * 1967-10-18 1969-04-22
DE2053506A1 (en) * 1970-10-31 1972-05-25 V Nauschno I Instr Grinding machine for making grooves in round parts

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105834898A (en) * 2016-05-20 2016-08-10 东莞市鸿金顺机械制造有限公司 Intelligent double-sided grinding head assembly of vertical high-precision high-speed grinding machine

Also Published As

Publication number Publication date
CH643476A5 (en) 1984-06-15
EP0057298A3 (en) 1983-04-27
JPS57144656A (en) 1982-09-07
SU1058493A3 (en) 1983-11-30

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