EP0281025B1 - Dispositif pour le meulage d'outils de coupe à rainure rectiligne ou hélicoidale - Google Patents

Dispositif pour le meulage d'outils de coupe à rainure rectiligne ou hélicoidale Download PDF

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Publication number
EP0281025B1
EP0281025B1 EP88102877A EP88102877A EP0281025B1 EP 0281025 B1 EP0281025 B1 EP 0281025B1 EP 88102877 A EP88102877 A EP 88102877A EP 88102877 A EP88102877 A EP 88102877A EP 0281025 B1 EP0281025 B1 EP 0281025B1
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EP
European Patent Office
Prior art keywords
spindle
actuating device
tool spindle
contact
roller
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
EP88102877A
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German (de)
English (en)
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EP0281025A1 (fr
Inventor
Volker Zang
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Individual
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Individual
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Filing date
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Priority to AT88102877T priority Critical patent/ATE66845T1/de
Publication of EP0281025A1 publication Critical patent/EP0281025A1/fr
Application granted granted Critical
Publication of EP0281025B1 publication Critical patent/EP0281025B1/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
    • B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
    • B24B3/02—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of milling cutters
    • 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
    • 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
    • B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
    • B24B3/24—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of drills
    • 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
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/04—Headstocks; Working-spindles; Features relating thereto

Definitions

  • the invention relates to a device for grinding straight and helically grooved cutting tools according to the preamble of claim 1, as e.g. is known from US-A-2503926.
  • Such a device to be used in conjunction with conventional tool grinding machines has a spindle which is mounted so as to be free of play and can be rotated back and forth to accommodate the tool to be ground, the pitch of which is necessary for generating the feed of the tool during grinding via the change in the angle of attack with the Spindle is set non-positively connected roller; see. DE-PS 32 32 689.
  • a tool with several helical cutting edges e.g. a milling cutter
  • the spindle for grinding the other cutting edges in their respective angular position with respect to the first cutting edge, corresponding to a cutting edge on the longitudinal axis Zero plane to be rotated by certain degrees; see.
  • US Pat. No. 2,503,926 it is necessary to release the non-positive connection between the spindle and the roller and, with the aid of the locking device working as an indexing device, to transfer the spindle into the new angular position in which the spindle passes through the locking device is fixed radially and axially.
  • the roll is placed on the spindle for the subsequent grinding of the new tool cutting edge and released after the attachment of the locking device. Since the locking device there is a cam disc firmly connected to the spindle with four equally spaced projections, which is associated with a fixed cam on the spindle bearing housing, the spindle can assume any position within 60 ° in the circumferential direction and is the axial position of the extent of the axial extent of the projections within the indexed position is undetermined.
  • the invention has for its object to simplify the known device in such a constructive and operational manner that while maintaining the backlash faster and safer than before, the adjustment of the spindle can be carried out according to the division of the cutting edges of the tool to be ground and operating errors are almost impossible.
  • the inventive design of the device avoids the influence of the manual skill of the operator on the grinding result.
  • the first actuating device is de-energized, so that the roller determining the pitch of the spindle is automatically lifted off the spindle. This simplifies the setting of the released spindle in the new angular position and prevents the surfaces of the spindle and the roller from being damaged during adjustment and the working accuracy being reduced as a result.
  • the second actuating device For indexing, only the second actuating device has to be closed with the help of the work contact designed as a pulse switch, so that the indexing pin of the locking device is moved into its angular position.
  • the indexing pin engages in the indexing disc and, due to the formation of the centering hole on the circumference of the indexing disc, moves the indexing disc and thus the associated spindle in the axial direction into the locking position, whereby the previously open quiescent current contact of the first actuating device is closed again.
  • the first actuating device is thereby switched on again and moves the roller in contact with the spindle.
  • the pulse switch can be released, so that the second actuation device is de-energized and the indexing pin resumes its rest position.
  • the spindle can now be moved again for the grinding process.
  • Another advantage is the fact that the contact pressure between the roller and the spindle can be regulated in a simple manner.
  • a two-part guide bushing 5 and 6 for one over a ball cage 7, 8 back and forth Spindle 14 rotatably mounted, receiving a workpiece or tool.
  • a roller 16 engages with its outer lateral surface 15 in the position shown in FIG. 1, which is rotatably supported by a bearing pin 17 in a bearing fork 18 which is mounted in the housing 4 by means of a ball bearing 20 up and down and rotatably.
  • a free space 9 is provided between the mutually facing guide bushes 5 and 6.
  • the bearing fork 18 is arranged in a recess 19 in the housing 4 and has a cylindrical extension 21 which is fixedly connected in the radial direction to an adjusting disk 22 having a graduation and resting on the housing.
  • the setting disk 22 fixed via the locking member 32 is connected via a pressure piece 21a and a spring plate membrane disk 21b to the cylindrical extension 21 of the bearing fork 18 so that an axial movement for lifting the roller 16 from the outer surface 15 of the spindle 14 is possible without that the set helix angle is changed.
  • a cylindrical bearing 21 is assigned a thrust bearing 25, which is acted upon by a pressure plate 26 acting as a switching element, which is arranged in a further recess 28 of the housing 4, which projects above the recess 19 mentioned above.
  • the recess 28 is followed by a further recess 29, which is also larger than the recess 28 and which receives an end plate 30 on which a locking member 32 is adjustably arranged.
  • the recesses 19, 28 and 29 form a stepped recess in the diameter of the housing 4, which extends to the guide bushes 5 and 6.
  • the housing 4 With the pressure plate 26 are four spaced apart, outside the area of the guide bushings 5 and 6 the housing 4 arranged through holes penetrating studs 35 which are screwed at their opposite ends to an anchor plate 36 which forms part of a first actuating device B1 and is assigned to an electromagnet M1.
  • the actuating device B 1 is arranged in a recess 38 of the housing 4 and is closed off from the outside by a cover plate 39 which is flush with the housing.
  • springs 43 In the blind bores 41 arranged coaxially to the stud bolts 35, springs 43 are arranged which endeavor to move the pressure plate 26 upward in relation to FIG. 1 to the extent of the gap of approx. 2 mm provided for this purpose.
  • the required helix angle of the workpiece can be found in a table.
  • the pitch of the workpiece in mm / rev corresponds to a certain setting angle of the setting disk 22.
  • the required angular position of the setting disk 22 for an existing spiral pitch on the workpiece can also be set directly using a dial gauge.
  • a bearing plate 50 which is coaxial with the spindle 14, is rotatably mounted on the right-hand end side of the housing 4 with reference to FIG. 1 and can be locked in the respective setting position with the aid of an adjusting screw 52 engaging in a semi-annular slot 51.
  • a locking device 53 assigned to the spindle 14 is fixedly connected to the bearing plate and supports an indexing pin 54 in radial alignment with the spindle 14, said indexing pin 54 being held in its rest position by a spring 55.
  • the indexing pin 54 is then with its tapered tip 56 out of engagement with an index disk 58 which is fixedly connected to the spindle 14 and has frustoconical recesses 59 which are arranged regularly distributed around its circumference.
  • the locking device 53 is also associated with an actuating device B2, which also has an electromagnet M2 which, when excited via a switching element 60, moves the indexing pin 54 against the action of the spring 55 into the operative position shown in FIG. 1, in which its tip 56 moves into a of the recesses 59 engages and locks the spindle 14 against rotational and axial movements, as shown in FIG. 1.
  • This position is the so-called grinding starting position, in which a bearing flange 57 of the spindle 14, on which the index disk 58 is arranged, is at a predetermined distance from the end face of the bearing plate 50, which in the present exemplary embodiment is approximately 2 mm.
  • the spindle 14 can be moved to the right by approximately 128 mm in the axial direction, so that the total axial freedom of movement of the spindle 14 in the housing 4 is 130 mm.
  • a quiescent current contact K1 is also arranged, which is opened by an actuating pin 63 can be when the spindle 14 is in its outermost position in relation to FIG. 2, in which the actuating pin 63 of the closed-circuit current contact K 1 is open via the index disk 58.
  • the quiescent current contact K1 is part of a circuit shown in Figure 2 with a power supply source Q, a potentiometer P1, the excitation coil M1 of the actuator B1, the coil M2 of the actuator B2 and the other switching contacts K2, K3, K4 and K5.
  • the switch contact K2 is designed as a switch, which in the first switching position is formed as a spring switch in the open position, the switch contact K3 is connected in series, while in the second switching position of the switch K2, not shown in Figure 2, the Pulse switch K3 is bridged.
  • the closed-circuit current contact K 1 can be bridged via the switch contact K 1, to which the switch contact K 1 is connected in series. Via the switching contacts K4 and K5, the function of the closed-circuit current contact K1 can be bridged. About the potentiometer P1, the excitation current of the magnet M1 of the actuator B1 and thus the contact pressure of the roller 16 on the outer surface 15 of the spindle 14 can be changed.
  • the device works as follows:
  • the setting angle of the roller 16 and thus the helix pitch of the spindle 14 can be adjusted via the adjusting plate 22, specifically in accordance with the helix angle of the tool cutting edges of the tool to be ground, not shown in FIG. 1, to be inserted into the cone 65 of the spindle Tool.
  • the helix angle of the tool is only identical if the shaft and workpiece have the same diameter.
  • the locking member 32 is to be rendered ineffective, while after the setting thereof is moved back into its position blocking the setting plate 22.
  • the helix angle is set with the actuating device B 1 switched on.
  • the spindle 14 In order to bring the workpiece cutting edges into a new angular position with respect to the grinding wheel by means of the indexing disk 58, the spindle 14 is to be moved from the starting starting position shown in FIG Index disc 58 and the actuating pin 63 is opened. Due to the closed current contact moved into the open position, the first actuating device B 1 is de-energized so that the roller determining the pitch of the spindle is lifted off the spindle via the springs 43. This releases the setting of the released spindle in the new angular position and at the same time prevents the surfaces of the spindle and roller from being damaged.
  • the second actuating device B2 With the help of the work contact designed as a pulse switch K3 to close, so that the indexing pin 54 of the locking device against the action of the spring 55 in its action is moved.
  • the indexing pin engages in the selected recess 59 arranged on the circumference of the indexing disc and moves the indexing disc and thus the associated disc as a result of the formation of the centering hole on the circumference of the indexing disc Spindle 14 in the axial direction in the locking position - namely in the starting position shown in Figure 1 - whereby the previously open quiescent current contact of the first actuating device is closed again.
  • the actuating device B1 is thereby switched on again and moves the roller over the switching elements described above until it comes into contact with the spindle.
  • the pulse switch can be released, so that the second actuator B2 is de-energized and the indexing pin 54 resumes its rest position via the spring 55.
  • the spindle 14 can now be moved again in the axial direction for a further grinding operation, with the lowered roller 16 simultaneously forcing it to perform a rotational movement corresponding to the set angle of inclination of the roller 16.
  • the adjustment of the spindle is therefore simple and easy and without fatigue.
  • the contact pressure between the roller and the spindle can be regulated in a simple manner by adjusting the potentiometer P 1.

Landscapes

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

Claims (7)

  1. Dispositif pour meuler des outils de coupe possédant des gorges rectilignes ou hélicoïdales, et comportant une broche porte-pièce ou porte-outil (14), qui peut tourner dans un carter (4) et peut être déplacée manuellement selon un mouvement combiné de rotation et d'avance, et dont le pas peut être réglé au moyen d'un galet (16) qui, en cours d'utilisation, peut être amené, de manière à établir une liaison de force, contre la surface enveloppe (15) de la broche porte-outil, peut pivoter autour d'un axe qui s'étend dans la direction radiale de la broche porte-outil (14) et est monté de manière à pouvoir être soulevé et abaissé le long de son axe de réglage (18'), ainsi qu'un dispositif de blocage (53) servant à bloquer la position angulaire de la broche porte-outil (14) en tant que position de départ pour le mouvement combiné de rotation et d'avance, caractérisé par le fait que le galet (16) est maintenu appliqué contre la broche porte-outil (14) par l'intermédiaire d'un premier dispositif d'actionnement (B1), qui possède un premier électroaimant (M1), à l'encontre de la force de ressorts (ressorts 43), que le dispositif de blocage (53), qui détermine la position angulaire de départ de la broche porte-outil (4), est maintenu élastiquement (ressort 55), dans une position qui libère la broche porte-outil, et peut être amené, par l'intermédiaire d'un second dispositif d'actionnement (B2) comportant un second électroaimant (M2), dans une position de blocage axial et radial de la broche porte-outil, et que le premier dispositif d'actionnement (B1) est commuté électriquement au moyen du second dispositif d'actionnement de telle sorte qu'il ne peut être enclenché qu'en fonction du dispositif de blocage (53) pouvant être déclenché par le second dispositif d'actionnement (B2).
  2. Dispositif suivant la revendication 1, caractérisé par le fait qu'il est prévu un contact de repos (K1) qui doit être ouvert sous l'effet de la venue de la broche porte-outil (14), selon un déplacement axial, dans la position initiale de meulage, pour le débranchement du premier dispositif d'actionnement électromagnétique (B1), tandis que le second dispositif d'actionnement électromagnétique (B2) peut être enclenché après fermeture d'un contact de travail (K2), par l'intermédiaire d'un contact de travail (K3) réalisé sous la forme d'un contact à impulsion.
  3. Dispositif suivant la revendication 2, caractérisé par le contact de repos (K1) peut être shunté au moyen d'un contact de travail (K4) et peut être fermé et ouvert par l'intermédiaire d'un second contact de travail (K5) branché en série.
  4. Dispositif suivant la revendication 2, caractérisé par le fait que la force de maintien du premier dispositif d'actionnement (B1) est réglable (P1).
  5. Dispositif suivant la revendication 1, caractérisé par le fait que le galet (16) est monté de manière à pouvoir tourner dans une fourche (18) montée dans un boîtier (4) de manière à pouvoir monter et descendre et tourner, et est maintenu dans la position de repos par les ressorts (43), par l'intermédiaire d'une plaque de pression (26).
  6. Dispositif suivant la revendication 1, caractérisé par le fait que le dispositif de blocage (53) comprend un disque d'indexage (58), fixé à la broche (14), et une tige d'indexage (54) qui coopère avec le disque d'indexage et possède une pointe conique qui est maintenue, par le ressort (55), dans un état dégagé des évidements (59) de forme correspondante, ménagés dans le disque d'indexage (58) monté sur la broche porte-outil.
  7. Dispositif suivant l'une quelconque des revendications 1 à 6, caractérisé par le fait que la broche (14), qui, dans la position initiale de meulage, ouvre le contact de repos (K1) agissant sur le premier dispositif d'actionnement (B1), peut être amenée, par l'intermédiaire de la tige d'indexage (54) du second dispositif d'actionnement (B2), lors de l'opération d'indexage, dans une position fermant le contact de repos (K1).
EP88102877A 1987-03-04 1988-02-26 Dispositif pour le meulage d'outils de coupe à rainure rectiligne ou hélicoidale Expired - Lifetime EP0281025B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88102877T ATE66845T1 (de) 1987-03-04 1988-02-26 Vorrichtung zum schleifen von gerad- und wendelgenuteten schneidwerkzeugen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873706948 DE3706948A1 (de) 1987-03-04 1987-03-04 Vorrichtung zum schleifen von gerad- und wendelgenuteten schneidwerkzeugen
DE3706948 1987-03-04

Publications (2)

Publication Number Publication Date
EP0281025A1 EP0281025A1 (fr) 1988-09-07
EP0281025B1 true EP0281025B1 (fr) 1991-09-04

Family

ID=6322259

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88102877A Expired - Lifetime EP0281025B1 (fr) 1987-03-04 1988-02-26 Dispositif pour le meulage d'outils de coupe à rainure rectiligne ou hélicoidale

Country Status (5)

Country Link
US (1) US4890419A (fr)
EP (1) EP0281025B1 (fr)
JP (1) JPH01228763A (fr)
AT (1) ATE66845T1 (fr)
DE (2) DE3706948A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2659260B1 (fr) * 1990-03-06 1994-04-15 Touraine Automatismes Indls Dispositif d'affutage des outils a aretes droites ou helicouidales muni d'un guidage de broche.
AUPQ992000A0 (en) * 2000-09-05 2000-09-28 Anca Pty Ltd Grinding of cutting tools with a constant rake angle
CN101804594B (zh) * 2010-05-07 2013-05-01 台州北平机床有限公司 刀具沟槽的磨削装置
CN113857956B (zh) * 2021-09-26 2024-05-24 宇环数控机床股份有限公司 一种双端面磨床磨头结构
CN114603406B (zh) * 2022-05-16 2022-07-08 山东鼎驰木业集团有限公司 木板加工用刀具自动磨刀机

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1355616A (en) * 1918-06-08 1920-10-12 Western Electric Co Feeding-head
US2325364A (en) * 1942-11-23 1943-07-27 Joseph W Boening Cutter feeding device
US2503926A (en) * 1945-04-28 1950-04-11 Raymond T Moloney Spiral grinding machine
FR975020A (fr) * 1948-09-20 1951-02-28 Horstmann Ets Procédé et dispositif pour rectifier les goujures d'un foret, pour procéder au détalonnage de celui-ci ou pour affûter un taraud ou un outil similaire
US3039244A (en) * 1961-03-06 1962-06-19 Wynn S Vickerman Tool grinding fixture
US3600860A (en) * 1969-07-14 1971-08-24 Warren Harding Liepold Adjustable angle helix generator for edge and radial relief sharpening
DE3232689C2 (de) * 1982-09-02 1985-10-24 Volker 8044 Lohhof Zang Vorrichtung zum Schleifen von gerad- und wendelgenuteten Schneidwerkzeugen
JPS61146457A (ja) * 1984-12-19 1986-07-04 Toshiaki Hosoi ドリルの切刃研摩装置

Also Published As

Publication number Publication date
US4890419A (en) 1990-01-02
JPH0581385B2 (fr) 1993-11-12
DE3864542D1 (de) 1991-10-10
ATE66845T1 (de) 1991-09-15
EP0281025A1 (fr) 1988-09-07
JPH01228763A (ja) 1989-09-12
DE3706948A1 (de) 1988-09-15

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