EP0072934B1 - Dispositif de palpage pour une machine pour l'affûtage automatique des broches - Google Patents

Dispositif de palpage pour une machine pour l'affûtage automatique des broches Download PDF

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Publication number
EP0072934B1
EP0072934B1 EP82106815A EP82106815A EP0072934B1 EP 0072934 B1 EP0072934 B1 EP 0072934B1 EP 82106815 A EP82106815 A EP 82106815A EP 82106815 A EP82106815 A EP 82106815A EP 0072934 B1 EP0072934 B1 EP 0072934B1
Authority
EP
European Patent Office
Prior art keywords
slide
vertical
horizontal slide
horizontal
tracer
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
Application number
EP82106815A
Other languages
German (de)
English (en)
Other versions
EP0072934A2 (fr
EP0072934A3 (en
Inventor
Roland Börner
Herbert Ing.Grad. Holstein
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.)
Oswald Forst Maschinenfabrik u Apparatebauanstalt GmbH and Co KG
Original Assignee
Oswald Forst Maschinenfabrik u Apparatebauanstalt GmbH and Co KG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6138950&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0072934(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Oswald Forst Maschinenfabrik u Apparatebauanstalt GmbH and Co KG filed Critical Oswald Forst Maschinenfabrik u Apparatebauanstalt GmbH and Co KG
Priority to AT82106815T priority Critical patent/ATE13151T1/de
Publication of EP0072934A2 publication Critical patent/EP0072934A2/fr
Publication of EP0072934A3 publication Critical patent/EP0072934A3/de
Application granted granted Critical
Publication of EP0072934B1 publication Critical patent/EP0072934B1/fr
Expired 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
    • B24B3/16—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of broaches

Definitions

  • the invention relates to a scanning device according to the preamble of claim 1.
  • Machines for automatically sharpening broaching tools with a scanning device and with a scanning finger of the generic type are known from US Pat. No. 3,646,593 and are also commercially available.
  • the touch finger falls over the cutting edge of the broaching tooth of a broaching tool to be ground, with a corresponding movement of the horizontal carriage, as a result of which the horizontal carriage is stopped.
  • an infeed movement of the vertical slide with the grinding slide then takes place in accordance with the vertical deflection of the touch finger, which rests with its horizontal contact surface on the free surface of the broaching tooth.
  • a tooth flank tester in which a measuring probe is arranged on a cross slide, each slide being assigned an X or Y drive together with an X or Y servo motor, position transmitter and position controller are.
  • the probe itself can be deflected.
  • the slides are moved by means of the servo motors. If their displacement does not correspond to a predefined program, then the probe located on the tooth flanks to be scanned is deflected, which leads to a change in the control of the servomotors.
  • the invention is therefore based on the object of designing a scanning device of the generic type in such a way that largely arbitrary but exact guidance of the scanning finger for determining the geometry of the broaching tool is possible.
  • the measures according to the invention make it possible for the touch finger to be displaceable exactly in right-angled coordinates and for the movement of the touch finger to be detected precisely in each coordinate direction, so that the original position of the cutting edge can be scanned by scanning the free surface and the rake face of the respective clearing tooth at a distance from the cutting edge is possible, as is described in detail in the unpublished EP-A-0 071 882.
  • Claims 2 to 4 indicate constructive measures by means of which it is ensured that the vertical slide and the horizontal slide, one of which carries the touch finger, can be moved from their respective rest position without play but smoothly.
  • the configuration according to the invention makes it possible for the finger to scan the position of the rake face and / or the bottom of the chip chamber below and behind the cutting edge, it is advantageous to provide the measures according to claim 5.
  • an automatic broaching machine has a horizontal slide 3, which is guided on a machine bed 1 and driven by a non-visible servo motor arranged in the machine bed 1 via a roller spindle 2 and carries a broaching tool 5 to be sharpened on a magnetic chuck 4.
  • the broaching tool also has a vertical slide 7 connected to the machine bed 1, which is also driven via a roller spindle 8 by a servo motor, likewise not visible in the drawing. At the upper end it rotatably supports a grinding slide 9 with one or more grinding spindles 10.
  • the grinding slide 9 can be moved back and forth on the vertical slide 7 transversely to the horizontal slide 3, ie perpendicular to the plane of the drawing in FIG. 1.
  • Switch or control cabinets 11 are also provided, in which the - pre-programmable - control devices for controlling the individual drive motors are accommodated.
  • a scanning device 12 is arranged on the front part of the grinding spindle 10, by means of which the geometry of the broaching tool 5 to be ground is detected in such a way that an exact regrinding is possible.
  • This broaching tool described so far is known in principle, for example, from US Pat. No. 3,646,593. Otherwise, this machine is commercially available.
  • the scanning device 12 has a closable by means of a lid 13 approximately cuboid housing 14 on which is attached to a base plate, not shown, on the grinding spindle 10, the attachment to this base plate can be such that an adjustment of the housing 14 by means of micrometer screws is possible, such as it is described in US-A-3,464,593.
  • a support frame 16 is screwed onto the bottom 15 of the housing facing the grinding spindle 10 and lying opposite the cover 13 and has two vertical holding webs 17, 18 arranged at a distance from one another and an upper horizontal holding web connecting them.
  • two guide rods 20, 21 are held at a distance from each other in a common vertical plane, which are fixed axially immovable by gluing in adapted holes 22 in the holding webs 17, 18.
  • a horizontal slide 23 is slidably mounted, which engages around the two guide rods 20, 21 by means of guide bushes 24, 25, ball cages 26, 27 being arranged between the guide rod 20 and 21 on the one hand and the guide bush 24 and 25 on the other are to ensure a smooth but play-free guidance and horizontal displaceability of the horizontal slide 23 relative to the housing 14 of the scanning device 12.
  • a vertical slide 28 is mounted so that it can move vertically.
  • two vertical guide columns 30, 31 are attached to a support bracket 29 arranged horizontally below the horizontal slide 23, which are fastened in corresponding bores 30 ', 31' in the support bracket 29 by gluing.
  • These guide columns 30, 31 are vertically displaceably mounted in corresponding vertical guide bushes 32, 33 of the horizontal slide 23.
  • ball cages 34, 35 are provided between guide bushing 32 and 33 on the one hand and guide columns 30 and 31 on the other hand, in order to ensure smooth and at the same time play-free guidance and displaceability of the vertical slide 28 relative to the horizontal slide 23.
  • the support bracket 29 of the vertical slide 28 is arranged below the lower side wall 36 of the housing 14, for which purpose a recess 37 is provided in this side wall 36.
  • a dust-tight closure of this recess 37 is achieved by a bellows 38 which is fastened on the one hand to the holding bracket 29 and on the other hand to the lower side wall 36.
  • An inductive displacement sensor 39 is fastened to the horizontal slide 23 by being fixed radially and axially in a corresponding bore 40 by means of a clamping screw 41 and being secured against rotation.
  • a downwardly projecting rod-shaped actuator 42 of the displacement transducer 39 is screwed onto the holding bracket 29 of the vertical slide 28. Since the displacement sensor 39 is arranged with its actuator 42 parallel to the guide columns 30, 31, vertical displacements of the vertical slide 28 are converted into movements of the actuator 42 of the displacement sensor 39 of the same size and thus into corresponding electrical signals.
  • Another horizontally arranged inductive displacement sensor 43 is fixed on the one hand in a corresponding bore 44 of the horizontal slide 23 by gluing.
  • its rod-shaped actuator 45 is screwed to a vertical holding web 18. Since this displacement transducer 43 with its actuator 45, which is displaceable relative to it, is also arranged parallel to the horizontal guide rods 20, 21, horizontal displacements of the horizontal slide 23 are converted into adjusting movements of the actuator 45 of the same size relative to the displacement transducer 43 and thus into corresponding electrical signals.
  • a stop bush 46 is fastened by gluing, which comes to bear against the vertical retaining web 18 in which the actuator 45 of the horizontal displacement sensor 43 is fastened.
  • the horizontal slide 23 is pressed into its rest position by a prestressed spring 47, which is arranged on a guide rod 21 and on the one hand bears against the other holding web 17 and the side of the horizontal slide 23 facing it.
  • the lower rest position of the vertical slide 28 is set again and again by its own weight.
  • a lever 49 is pivotally mounted about an axis 50.
  • the lever 49 is arranged in the plane which is spanned by the displacement directions of the horizontal slide 23 and the vertical slide 28; the axis 50 is therefore normally arranged for this.
  • the lever 49 has a leg 51 located below the axis 50 and angled away from the axis 50, which engages under a pin 52 fastened to the vertical slide 28.
  • This pin is attached to a stop piece 53, which is screwed from above on the front side by means of a screw 54 against a guide column 30, as a result of which the vertical slide 28 is simultaneously secured against falling out of the horizontal slide 23.
  • a core 57 of a lifting magnet 58 which is fastened to the associated vertical side wall 59, engages on a leg 55 of the lever 49 ending above the axis 50 with the interposition of a spring 56, the core 57 passing through this side wall 59 through an opening 60.
  • a touch finger 61 is fastened, which is arranged in an adapted recess 62 of the support bracket 29 and is fixed upwards by means of a transverse pin 63. Axial, radial and tangential fixation is achieved by means of a grub screw 64.
  • the touch finger 61 has at its lower end an inclined run-up surface 65, which is followed by a front nose 66 serving as a distant signal transmitter.
  • This front nose 66 is delimited by a vertically recessed vertical surface 67 which is adjoined by a horizontal contact surface 68.
  • a measuring edge 69 is formed, which is formed by the contact surface 68 and an undercut surface 70, which slants back upwards.
  • This undercut surface 70 delimits an undercut 71 which is adjoined by a horizontal touch surface 72 which has an edge 73 toward the undercut 71.
  • the contact surface 68 jumps upwards by the dimension “a” relative to the front nose 66.
  • the horizontal tactile surface 72 jumps up again by the dimension “b” relative to the contact surface 68. Both dimensions range from a few tenths to 1 millimeter.
  • the horizontal extent of the undercut 71 is also a few tenths to a maximum of 1 millimeter.
  • a broaching tool 5 the worn cutting edges 74 of which are to be sharpened again by grinding the rake face 75 and / or the free face 76, is moved in the direction 77 by appropriate driving of the horizontal slide 3, then the tracer finger 61 runs over the free face 76 and falls with it Front nose 66 over the cutting edge 74. This movement triggers a signal in the vertical displacement sensor 39, by means of which the drive motor of the horizontal slide 3 is switched from overdrive to a creep speed.
  • a delivery of the vertical slide 7 is triggered via the displacement sensor 39 until the displacement sensor has been adjusted. Subsequent subsequent operations are then triggered. These first include the excitation of the solenoid 58, the core 57 of which is drawn into it, whereby the lever 49 is pivoted about the axis 50 and the vertical slide 28 on the one hand, but on the other hand also moves the horizontal slide 23 further out of its rest position, so that the touch finger 61 is lifted freely from the respective clearing tooth 78 from the free surface 76 and the rake surface 75 without grinding there. This also triggers the actual grinding operations.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Claims (5)

1. Dispositif de palpage (12) pour une machine pour l'affûtage automatique des outils à brocher (5), comportant un chariot horizontal (3) pour le montage d'un outil à brocher (5) à affûter et un chariot vertical (7) avec au minimum une broche portemeule (10), un doigt de palpage (61), mobile sensiblement verticalement par rapport au dispositif de palpage (12), étant prévu pour la détection de la position d'une dent de brochage (78) de l'outil à brocher (5), qui est accouplé à un élément qui fournit des signaux fonction du dé- plament pour l'excitation de commandes des chariots de la machine, caractérisé en ce que le doigt de palpage (61) est fixé rigidement sur l'un des deux chariots mobiles perpendiculairement l'un par rapport à l'autre (chariot horizontal 23, chariot vertical 28), chacun d'eux librement à partir d'une position de repos, et en ce qu'à chaque chariot est associé un capteur de déplacement (39, 43) déterminant sa trajectoire de déplacement à partir de la position de repos.
2. Dispositif de palpage selon la revendication 1, caractérisé en ce que le doigt de palpage (61) est disposé sur un chariot vertical (28) monté pour coulisser verticalement sur un chariot vertical (28) monté pour coulisser verticalement sur un chariot horizontal (23), le chariot horizontal (23) étant monté pour coulisser horizontalement sur des guidages (barres de guidage 20, 21) fixes vis-à-vis du dispositif de palpage (12).
3. Dispositif de palpage selon la revendication 2, caractérisé en ce que le chariot vertical (28) et le chariot horizontal (23) sont montés au moyen de colonnes de guidage (30, 31) ainsi que de barres de guidage (20, 21) et de douilles de guidage (32, 33; 24, 25) correspondantes les recevant.
4. Dispositif de palpage selon la revendication 3, caractérisé en ce que des paliers à roulement sont respectivement prévus dans les douilles de guidage (24,25; 32,33).
5. Dispositif de palpage selon l'une des revendications 1 à 4, dans lequel un dispositif de manoeuvre est prévu pour lever le doigt de palpage (61), caractérisé en ce que le dispositif de manoeuvre est relié à un levier pivotant (49) agissant sur l'un des chariots (chariot vertical 28) dans le sens de déplacement du chariot horizontal (23) et du chariot vertical (28).
EP82106815A 1981-08-08 1982-07-28 Dispositif de palpage pour une machine pour l'affûtage automatique des broches Expired EP0072934B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82106815T ATE13151T1 (de) 1981-08-08 1982-07-28 Abtasteinrichtung fuer eine maschine zum automatischen schaerfen von raeumwerkzeugen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813131511 DE3131511A1 (de) 1981-08-08 1981-08-08 Abtasteinrichtung fuer eine maschine zum automatischen schaerfen von raeumwerkzeugen
DE3131511 1981-08-08

Publications (3)

Publication Number Publication Date
EP0072934A2 EP0072934A2 (fr) 1983-03-02
EP0072934A3 EP0072934A3 (en) 1983-05-18
EP0072934B1 true EP0072934B1 (fr) 1985-05-08

Family

ID=6138950

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82106815A Expired EP0072934B1 (fr) 1981-08-08 1982-07-28 Dispositif de palpage pour une machine pour l'affûtage automatique des broches

Country Status (4)

Country Link
US (1) US4514935A (fr)
EP (1) EP0072934B1 (fr)
AT (1) ATE13151T1 (fr)
DE (2) DE3131511A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9401282U1 (de) * 1994-01-26 1994-03-10 Oswald Forst Maschinenfabrik und Apparatebauanstalt GmbH & Co KG, 42659 Solingen Maschine zum automatischen Schärfen von Räumwerkzeugen

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1178278B (de) * 1957-05-25 1964-09-17 Bbc Brown Boveri & Cie Taster fuer Nachformwerkzeugmaschinen mit sich drehendem Werkzeug, insbesondere Messerkoepfe
DE1752718C3 (de) * 1968-07-05 1975-02-13 Oswald Forst Maschinenfabrik Und Apparatebauanstalt Gmbh, 5650 Solingen Maschine zum automatischen Schärfen von Räumwerkzeugen
US3616578A (en) * 1969-01-10 1971-11-02 Ingersoll Milling Machine Co Method for turning workpieces
US4166323A (en) * 1973-09-14 1979-09-04 Maag Gear-Wheel & Machine Co. Ltd. Gear tester for profile and lead testing
DE2646209B1 (de) * 1976-10-13 1978-01-12 Klink Gmbh Arthur Vorrichtung zum automatischen nachschleifen von raeumwerkzeugen
DE2926807C2 (de) * 1979-07-03 1986-11-13 Arthur Klink Gmbh, 7530 Pforzheim Verfahren zum automatischen Positionieren einer Räumwerkzeugschärfmaschine und Vorrichtung zum automatischen Nachschleifen von Räumwerkzeugen
IT1118941B (it) * 1979-10-03 1986-03-03 Tacchella Macchine Spa Macchina affilatrice per brucce
DE2948337C2 (de) * 1979-10-11 1983-07-21 Maag-Zahnräder & -Maschinen AG, 8023 Zürich Schaltungsanordnung zum Festlegen der Grenzen einer Meßstrecke eines Zahnflankenprüfgerätes
US4348838A (en) * 1980-11-13 1982-09-14 Tacchella Macchine S.P.A. Broach sharpening machine
DE3131557A1 (de) * 1981-08-08 1983-02-24 Oswald Forst Maschinenfabrik und Apparatebauanstalt GmbH & Co KG, 5650 Solingen Tastfinger fuer eine abtasteinrichtung einer maschine zum automatischen schaerfen von raeumwerkzeugen

Also Published As

Publication number Publication date
US4514935A (en) 1985-05-07
DE3131511A1 (de) 1983-02-17
ATE13151T1 (de) 1985-05-15
DE3131511C2 (fr) 1991-02-14
DE3263674D1 (en) 1985-06-13
EP0072934A2 (fr) 1983-03-02
EP0072934A3 (en) 1983-05-18

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