EP0074518B1 - Rectifieuse de précision, en particulier rectifieuse de formes par projection - Google Patents

Rectifieuse de précision, en particulier rectifieuse de formes par projection Download PDF

Info

Publication number
EP0074518B1
EP0074518B1 EP82107665A EP82107665A EP0074518B1 EP 0074518 B1 EP0074518 B1 EP 0074518B1 EP 82107665 A EP82107665 A EP 82107665A EP 82107665 A EP82107665 A EP 82107665A EP 0074518 B1 EP0074518 B1 EP 0074518B1
Authority
EP
European Patent Office
Prior art keywords
grinding wheel
grinding
grinding machine
dressing
precision
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
EP82107665A
Other languages
German (de)
English (en)
Other versions
EP0074518B2 (fr
EP0074518A2 (fr
EP0074518A3 (en
Inventor
Alfred Dipl.-Ing. Kolb
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.)
WERKZEUGMASCHINENBAU PRAEZISIONS-TECHNIK GMBH
Original Assignee
Werkzeugmaschinenbau Prazisions-Technik 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6141500&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0074518(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Werkzeugmaschinenbau Prazisions-Technik GmbH filed Critical Werkzeugmaschinenbau Prazisions-Technik GmbH
Publication of EP0074518A2 publication Critical patent/EP0074518A2/fr
Publication of EP0074518A3 publication Critical patent/EP0074518A3/de
Publication of EP0074518B1 publication Critical patent/EP0074518B1/fr
Application granted granted Critical
Publication of EP0074518B2 publication Critical patent/EP0074518B2/fr
Expired legal-status Critical Current

Links

Images

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
    • B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
    • B24B49/18—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation taking regard of the presence of dressing tools
    • 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
    • B24B17/00—Special adaptations of machines or devices for grinding controlled by patterns, drawings, magnetic tapes or the like; Accessories therefor
    • B24B17/04—Special adaptations of machines or devices for grinding controlled by patterns, drawings, magnetic tapes or the like; Accessories therefor involving optical auxiliary means, e.g. optical projection form grinding machines

Definitions

  • the invention relates to a precision grinding machine, in particular a projection form grinding machine, with a grinding wheel processing a workpiece, as specified in the preamble of claim 1.
  • a grinding machine is known, for example, from DE-A-2452396.
  • the contour of the machined workpiece can be observed on a projection screen and the grinding wheel can be guided along this line by hand along a desired shape line. Wear of the grinding wheel during operation can be easily corrected visually.
  • the dressing body is located together with the workpiece on the workpiece table, and to dress the grinding wheel, the entire workpiece table must be moved so that the workpiece is disengaged and the dressing body is brought into engagement .
  • the workpiece table is moved overall so that the dressing body assumes a precisely defined position with respect to the grinding wheel slide, so that after each dressing process the grinding wheel has a constant position of the active surface of the grinding wheel with respect to the grinding wheel slide. To restart the machining process, the workpiece table must then be moved back again.
  • the object of the invention is to design the dressing process in a precision grinding machine, in particular in a projection form grinding machine, in such a way that dressing is possible during the normal machining process.
  • the grinding wheel comes into contact with the complementary profile groove over its entire cross section, that is to say the grinding wheel is simultaneously dressed to the desired dimension over its entire active surface.
  • the wear of the dressing tool is considerably less than when dressing with a single-grain diamond. It is also possible to give the grinding wheel complex profiles that deviate from a straight line and a circular shape, for example.
  • the dressing process can be carried out practically during normal operation, since the dressing body can engage at a point different from the point of engagement between the grinding wheel and the tool, for example opposite the point of engagement.
  • the feed movement of the dressing body can be controlled by the CNC control of the grinding machine, and the CNC control changes the distance between the grinding wheel and the workpiece to be machined in accordance with the respective position of the dressing body relative to the grinding wheel.
  • control unit controls the infeed movement of the dressing body, it has a measure of the distance between the dressing body and the grinding wheel with the size of the infeed movement of the dressing body and thus a measure of the instantaneous shape of the grinding wheel. This measure can therefore be used directly by the control to adjust the relative distance between the grinding wheel and the tool accordingly, so that inaccuracies that can be attributed to the abrasion of the grinding wheel can be continuously compensated for during operation. It is sufficient to feed the dressing body to the extent that wear of the grinding wheel is to be expected.
  • the dressing device does not have to be with the Be in contact with the grinding wheel, it is sufficient to move the dressing body towards the grinding wheel at certain time intervals and then pull it back again.
  • the profile groove in the dressing body runs parallel to the grinding wheel stroke in the case of a grinding wheel performing a reciprocating stroke movement, and in particular if the profile groove extends over the entire length of the dressing body and is open on its end faces. This is because the stroke movement of the grinding wheel can then be used to guide the grinding wheel over the entire length of the profile groove in the dressing body, so that the grinding wheel is ground successively from different areas of the profile groove. This significantly reduces the wear of the dressing body. This process can also be easily carried out in normal operation.
  • the dressing body has a plurality of profile grooves of different cross-sectional shape next to one another and is displaceable transversely to its infeed direction. With this shift, a certain profile groove can be aligned with the grinding wheel, on the other hand, the preferred embodiment makes it possible to provide the grinding wheel with different profiles, since the profile groove dressing the grinding wheel can be replaced by the transverse displacement of the dressing body.
  • the projection shape grinding machine shown in FIG. 1 has a cross table 1 with slides 2, 3 which can be moved perpendicular to one another and which can be displaced by means of servomotors 4 and 5, respectively.
  • the upper carriage 3 (FIG. 2) carries a holder 6 for a grinding wheel 7.
  • the holder 6 can be displaced in the vertical direction on a carrier 8 placed on the upper carriage 3, so that the grinding wheel can be moved up and down during operation, as shown by arrow 9 in Fig. 2.
  • the workpiece 11 to be machined is fastened on a further cross table 10 (FIG. 1). It can be advanced by means of the cross table 10 into a processing position in which the grinding wheel can be brought into engagement with the workpiece.
  • the point of intervention can be shown enlarged on a projection screen 12.
  • a light source 13 illuminating the point of engagement, a projection objective 14 and deflecting mirrors 15 and 16 are provided.
  • a silhouette 18 of the grinding wheel 7 and a silhouette 19 of the workpiece 11 are depicted on the projection screen.
  • a transparent support is usually placed on the projection screen 12 and contains the target shape curve so that the actual shape of the workpiece can be compared directly with the target shape.
  • the grinding wheel is controlled so that it grinds a contour that corresponds to the target shape into the workpiece.
  • This can be done manually, for this purpose handwheels 20 and 21 are provided, which slide the carriages 2 and 3 of the cross table 1 in each direction.
  • control will normally take place by means of a CNC control 22, which controls the servomotors 4 and 5 accordingly.
  • a dressing device 23 is also held on the carrier 8 and comprises a holder 24 that can be advanced in the direction of the grinding wheel 7.
  • the feed movement of the holder can be carried out manually or by means of a servomotor 25, which can also be controlled by the CNC control 22.
  • the holder 24 At its end facing the grinding wheel, the holder 24 carries a dressing body 26, the design of which is explained below in particular with reference to FIGS. 3 and 4.
  • the dressing body 26 has on its side facing the grinding wheel a profile groove 27 which is open towards the grinding wheel and which, in the exemplary embodiment shown, extends over the entire length of the dressing body 26 and is open on the end faces.
  • the surface of the profile groove 27 is designed as a grinding surface, for example by coating with diamonds.
  • the cross-sectional shape is complementary to the desired grinding wheel profile.
  • the dressing body shown in Figure 3 has only a single profile groove 27, this dressing body can be attached to the holder 24 by means of an extension 28 on its rear side.
  • the longitudinal direction of the profile grooves 27 is arranged parallel to the direction of the oscillating stroke movement of the grinding wheel 7. If, on the other hand, the grinding wheel does not perform a lifting movement but maintains a constant height, the direction of the profile grooves coincides with the direction of the tangent to the point of the grinding wheel closest to the dressing body 26.
  • the holder 24 with the dressing body 26 is pushed onto the grinding wheel 7 until the grinding wheel comes into contact with the grinding surfaces of the profile groove 27, so that the grinding wheel is dressed.
  • the profile of the grinding wheel results from the profile of the respective profile groove.
  • the grinding process does not always take place at the same point on the profile groove, but moves along the profile groove depending on the instantaneous position of the grinding wheel. This results in a significantly reduced wear of the grinding surface of the profile groove.
  • the dressing device can be brought out of engagement with the grinding wheel again by pushing back the holder 24.
  • the dressing body shown in FIG. 4 can be used to provide grinding wheels with different profiles; it suffices to move the dressing body 26 transversely to the grinding wheel plane.
  • the infeed movement of the dressing device 23 takes place via the servomotor 25 controlled by the CNC control.
  • This infeed can take place continuously or at time intervals during normal grinding operation.
  • the size of the infeed or the time interval between infeeds depends on the natural abrasion of the grinding wheel during normal grinding operations.
  • the CNC control Since the infeed movement is controlled by the CNC control via the servomotor 25 and since the respective shape of the grinding wheel adjusts itself according to the position of the dressing device 23, the CNC control has a signal which corresponds to the respective grinding wheel size. This signal can be used to adjust the relative distance between the grinding wheel and the workpiece in accordance with the respective grinding wheel size, for example by actuating the servomotor 4. In this way it is ensured during the entire operation that the respective abrasion of the grinding wheel is taken into account, incorrect mass due to wear of the This virtually eliminates the grinding wheel.
  • Dressing the grinding wheel is also in no way time-consuming, since it can take place during normal operation; an interruption is not necessary.
  • the grinding wheel can be dressed with different profiles that result from the respective cross-sectional shape of the profile grooves 27.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)

Claims (7)

1. Rectifieuse de précision, et en particulier rectifieuse de profil à projection, comprenant une meule (7) usinant une pièce, un bâton dresseur (26) muni d'au moins une gorge profilée, ouverte en direction de la meule, s'étendant tangentiellement à cette dernière, dont la surface est abrasive et dont la section est complémentaire du profil souhaité de la meule, et une commande numérique du mouvement relatif de la meule et de la pièce, et du dressage automatique de la meule par le bâton dresseur, ladite rectifieuse étant caractérisée en ce que le bâton dresseur (26) est amené pour le dressage de la meule (7) sur cette dernière et dans son plan; l'amenage du bâton dresseur est commandable par la commande numérique (22); et la commande numérique (22) fait varier la distance entre la meule (7) et la pièce (11 ) à usiner, en fonction de la position instantanée du bâton dresseur (26) par rapport à la meule (7).
2. Rectifieuse de précision selon revendication 1, caractérisé en ce que le dispositif de dressage 23 est fixé sur un montant (8) qui porte aussi la meule (7).
3. Rectifieuse de précision selon revendication 1, caracterisée en ce que la gorge profilée (27) du bâton dresseur (26) est, dans le cas d'une meule (7) effectuant un mouvement de va-et-vient en foncitionnement, parallèle à la course de la meule.
4. Rectifieuse de précision selon revendication 3, caractérisée en ce que la gorge profilée (27) s'étend sur toute la longueur du bâton dresseur (26) et est ouverte sur ses faces frontales.
5. Rectifieuse de précision selon une quelconque des revendications 1 à 4, caractérisée en ce que le bâton dresseur (26) présente côte à côte plusieurs gorges profilées (27) à section de forme différente et peut être translaté perpendiculairement à sa direction d'amenage.
6. Rectifieuse de précision selon une quelconque des revendications 1 à 5, caractérisée en ce que les surfaces abrasives des gorges profilées (27) sont diamantées.
7. Rectifieuse de précision selon une quelconque des revendications 1 à 6, caractérisée en ce que le mouvement d'amenage du bâton dresseur (26) est commandé par un servomoteur (25).
EP82107665A 1981-09-12 1982-08-21 Rectifieuse de précision, en particulier rectifieuse de formes par projection Expired EP0074518B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3136240 1981-09-12
DE19813136240 DE3136240A1 (de) 1981-09-12 1981-09-12 Praezisionsschleifmaschine, insbesondere projektions-formenschleifmaschine

Publications (4)

Publication Number Publication Date
EP0074518A2 EP0074518A2 (fr) 1983-03-23
EP0074518A3 EP0074518A3 (en) 1983-07-20
EP0074518B1 true EP0074518B1 (fr) 1986-01-29
EP0074518B2 EP0074518B2 (fr) 1989-04-05

Family

ID=6141500

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82107665A Expired EP0074518B2 (fr) 1981-09-12 1982-08-21 Rectifieuse de précision, en particulier rectifieuse de formes par projection

Country Status (3)

Country Link
EP (1) EP0074518B2 (fr)
JP (1) JPS5882662A (fr)
DE (2) DE3136240A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59169720A (ja) * 1983-03-16 1984-09-25 Inoue Japax Res Inc 電気加工用マシニングセンタ
DE3311861A1 (de) * 1983-03-31 1984-10-04 Werkzeugmaschinenbau Präzisions-Technik GmbH Wertheim, 6980 Wertheim Verfahren zum ueberwachen des betriebsverhaltens von projektions-formen-schleifmaschinen
JPS61141067U (fr) * 1985-02-22 1986-09-01
JPH0123728Y2 (fr) * 1985-03-29 1989-07-20
JPH0639056B2 (ja) * 1988-04-21 1994-05-25 牧野フライス精機株式会社 Ｎｃ工具研削盤の砥石整形方法と装置
IT1235588B (it) * 1989-09-07 1992-09-11 Cima Apparecchiatura per la diamantatura delle mole a vite nelle macchine rettificatrici di ingranaggi
GB2348837B (en) * 1996-06-15 2001-01-17 Unova Uk Ltd Improvements in and relating to grinding and polishing machines
CN102218682B (zh) * 2011-03-24 2013-03-13 新乡日升数控轴承装备股份有限公司 一种圆锥滚子数控磨床
CN102528620A (zh) * 2011-11-10 2012-07-04 贵州英特利智能控制工程研究有限责任公司 五轴联动的数控工具磨床

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE165235C (fr) *
AT23431B (de) * 1904-05-03 1906-03-10 Richard Klinger Vorrichtung zum Schleifen von Profilen und Facetten.
DE473868C (de) * 1927-05-19 1929-03-26 Johannes Wilberz Ab- und Beistellen der Schleifscheibe an Praezisions-Schleifmaschinen zum Abrichten und nach dem Abrichten in die urspruengliche, genau einzuhaltende Arbeitsstellung
US2337183A (en) * 1941-11-03 1943-12-21 American Optical Corp Honing device
US2770925A (en) * 1954-10-19 1956-11-20 Wheel Trueing Tool Co Form dressing tool
GB1213631A (en) * 1966-11-18 1970-11-25 Wickman Mach Tool Sales Ltd Profile grinding machines
JPS5113491A (ja) * 1974-07-24 1976-02-02 Nippei Sangyo Kk Kensakuban
DE2452396C3 (de) * 1974-11-05 1978-11-02 Heckler & Koch Gmbh, 7238 Oberndorf Profilschleifmaschine
JPS5537201A (en) * 1978-08-29 1980-03-15 Isao Tomizawa Grinder wheel shaping method at orifice of small-diameter tube
US4274231A (en) * 1978-12-20 1981-06-23 Boyar-Schultz Corporation Method and apparatus for dressing a grinding wheel

Also Published As

Publication number Publication date
EP0074518B2 (fr) 1989-04-05
EP0074518A2 (fr) 1983-03-23
DE3268825D1 (en) 1986-03-13
DE3136240A1 (de) 1983-03-31
EP0074518A3 (en) 1983-07-20
JPS5882662A (ja) 1983-05-18

Similar Documents

Publication Publication Date Title
DE2760355C2 (fr)
DE2654404C2 (de) Transparentzeichnung zum Auflegen auf den Bildschirm einer numerisch steuerbaren Projektionsformenschleifmaschine
DE2742307A1 (de) Verfahren und vorrichtung zum schleifen und/oder polieren von optischen flaechen
DE2814676A1 (de) Vorrichtung zum honen von zahnraedern
EP0074518B1 (fr) Rectifieuse de précision, en particulier rectifieuse de formes par projection
DE485404C (de) Vorrichtung zur Steuerung der Bei- und Abstellvorrichtung an Schleifmaschinen
DE4232497C2 (de) Vorrichtung zur Positionierung einer Karosserie auf einem Förderer
EP0538435B1 (fr) Procede d'usinage en plusieurs etapes de dents pour lames de scies, ainsi que machine d'usinage de scies pour la realisation du procede
DE3826655A1 (de) Selbsttaetiges verfahren zum glaetten und polieren von platten aus marmor, granit oder steinen anderer art
EP0602308B1 (fr) Dispositif pour travailler les cÔtés de pièces en forme de plaques alimentées de façon continue
DE3512761C2 (fr)
DE3911719C2 (fr)
EP1387743B1 (fr) Unite de detourage pour une machine continue commandee par programme
DE19518710C1 (de) Vorrichtung zum bahngesteuerten Schärfen von Sägeverzahnungen
DE6902724U (de) Schleifmaschine zum praezisionsschleifen eines werkzeuges.
DE2723231B2 (de) Maschine zum Abrunden mit einem vorbestimmten Radius der Ecken von Glasplatten
DE3048738C2 (de) Vorschubeinrichtung zum intermittierenden Drehen eines Kreissägeblattes
EP0549821B1 (fr) Procédé pour opérer le pierrage de forages et tête de pierrage pour la mise en oeuvre du procédé
DE3220038C2 (de) Fräseinrichtung zur Bearbeitung der Seitenflächen von Steinen
DE10341776B4 (de) Verfahren zur Bearbeitung eines Werkstücks mittels eines rotierenden, spanabhebenden Werkzeugs
DE3315302A1 (de) Verfahren und vorrichtung zum einloeten von hartmetallzaehnen in stammblaetter
DE626282C (de) Selbsttaetige Drehbank
DE3434338C2 (fr)
DE1652105A1 (de) Verfahren und einrichtung zum abrichten von profilschleifscheiben
DE586327C (de) Verfahren und Einrichtung zur Herstellung von Formzeugen fuer Brikettstrangpressen

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): CH DE FR GB IT LI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): CH DE FR GB IT LI

17P Request for examination filed

Effective date: 19840119

ITF It: translation for a ep patent filed

Owner name: BARZANO' E ZANARDO MILANO S.P.A.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): CH DE FR GB IT LI

ET Fr: translation filed
REF Corresponds to:

Ref document number: 3268825

Country of ref document: DE

Date of ref document: 19860313

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: HAUNI-WERKE KOERBER & CO. KG

Effective date: 19861024

REG Reference to a national code

Ref country code: CH

Ref legal event code: PUE

Owner name: WERKZEUGMASCHINENBAU PRAEZISIONS-TECHNIK GMBH

PLAB Opposition data, opponent's data or that of the opponent's representative modified

Free format text: ORIGINAL CODE: 0009299OPPO

RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: WERKZEUGMASCHINENBAU PRAEZISIONS-TECHNIK GMBH WER

R26 Opposition filed (corrected)

Opponent name: KOERBER AG

Effective date: 19861024

ITPR It: changes in ownership of a european patent

Owner name: CESSIONE;WERKZEUGMASCHINENBAU PRAEZISIONS-TECHNIK

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732

PUAH Patent maintained in amended form

Free format text: ORIGINAL CODE: 0009272

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT MAINTAINED AS AMENDED

RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: WERKZEUGMASCHINENBAU PRAEZISIONS-TECHNIK GMBH

27A Patent maintained in amended form

Effective date: 19890405

AK Designated contracting states

Kind code of ref document: B2

Designated state(s): CH DE FR GB IT LI

ITF It: translation for a ep patent filed

Owner name: BARZANO' E ZANARDO MILANO S.P.A.

ET3 Fr: translation filed ** decision concerning opposition
ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19920622

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19920629

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19920807

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19920924

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19930821

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19930831

Ref country code: CH

Effective date: 19930831

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19930821

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19940429

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19940503

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST