EP0074518A2 - Rectifieuse de précision, en particulier rectifieuse de formes par projection - Google Patents

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

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Publication number
EP0074518A2
EP0074518A2 EP82107665A EP82107665A EP0074518A2 EP 0074518 A2 EP0074518 A2 EP 0074518A2 EP 82107665 A EP82107665 A EP 82107665A EP 82107665 A EP82107665 A EP 82107665A EP 0074518 A2 EP0074518 A2 EP 0074518A2
Authority
EP
European Patent Office
Prior art keywords
grinding wheel
grinding
grinding machine
dressing
dressing body
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.)
Granted
Application number
EP82107665A
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German (de)
English (en)
Other versions
EP0074518A3 (en
EP0074518B1 (fr
EP0074518B2 (fr
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
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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
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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
    • 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 shape grinding machine, with a grinding wheel processing a workpiece, as specified in the preamble of claim 1.
  • a grinding machine is e.g. known from German patent specification 473 868.
  • the contour of the machined workpiece can be observed on a projection screen and the grinding wheel corresponding to this contour can be guided by hand along a nominal shape line. Wear of the grinding wheel during operation can be easily corrected visually.
  • the object of the invention is to considerably simplify the dressing process in a precision grinding machine, in particular in a projection form grinding machine, and in particular to design it 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.
  • 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.
  • the size of the infeed movement of the dressing body has a measure of the distance between the dressing body and the grinding wheel 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 Unge Accuracies 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. You get absolute security if you choose the infeed movement - or the time interval between successive infeed movements - in such a way that the dressing body always removes a little more material from the grinding wheel than can be expected from natural abrasion when machining the workpiece.
  • the dressing device does not have to be in contact with the grinding wheel during the entire operating process; it is sufficient if the dressing body is moved to the grinding wheel at certain time intervals for dressing and then withdrawing it 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 lifting 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 feed 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 is displaceable 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, such as this is represented by the 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, which contains the target shape curve, is normally placed on the projection screen 12, 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 move the slides 2 and 3 of the cross table 1 in one 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 extends in the exemplary embodiment shown 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 feed 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)
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
DE19813136240 DE3136240A1 (de) 1981-09-12 1981-09-12 Praezisionsschleifmaschine, insbesondere projektions-formenschleifmaschine
DE3136240 1981-09-12

Publications (4)

Publication Number Publication Date
EP0074518A2 true EP0074518A2 (fr) 1983-03-23
EP0074518A3 EP0074518A3 (en) 1983-07-20
EP0074518B1 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)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0121212A2 (fr) * 1983-03-31 1984-10-10 Werkzeugmaschinenbau Präzisions-Technik GmbH Wertheim Procédé pour la surveillance du comportement en service de rectifieuses de profils par projection optique
US4596066A (en) * 1983-03-16 1986-06-24 Inoue-Japax Research Incorporated Machining center
EP0417050A2 (fr) * 1989-09-07 1991-03-13 Pfauter Italia S.P.A. Dispositif de dressage pour des outils de meulage sous forme de vis sans fin dans des machines à meuler des roues d'engrenage
GB2348837A (en) * 1996-06-15 2000-10-18 Unova Uk Ltd Grinding machine
CN102218682A (zh) * 2011-03-24 2011-10-19 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

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
GB1213631A (en) * 1966-11-18 1970-11-25 Wickman Mach Tool Sales Ltd Profile grinding machines
DE2452396A1 (de) * 1974-11-05 1976-05-13 Heckler & Koch Gmbh Profilschleifmaschine

Family Cites Families (7)

* 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.
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
JPS5113491A (ja) * 1974-07-24 1976-02-02 Nippei Sangyo Kk Kensakuban
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
GB1213631A (en) * 1966-11-18 1970-11-25 Wickman Mach Tool Sales Ltd Profile grinding machines
DE2452396A1 (de) * 1974-11-05 1976-05-13 Heckler & Koch Gmbh Profilschleifmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
OBERFL[CHENTECHNIK, 53. Jahrg., Oktober-Dezember 1976, Coburg "Die neue numerisch gesteuerte Formschleifmaschine für Messerköpfe und Fräser", Seite 384 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4596066A (en) * 1983-03-16 1986-06-24 Inoue-Japax Research Incorporated Machining center
EP0121212A2 (fr) * 1983-03-31 1984-10-10 Werkzeugmaschinenbau Präzisions-Technik GmbH Wertheim Procédé pour la surveillance du comportement en service de rectifieuses de profils par projection optique
EP0121212A3 (en) * 1983-03-31 1986-09-03 Wertheim Praezisions Tech Method of controlling the service performance of projection form grinding machines
EP0417050A2 (fr) * 1989-09-07 1991-03-13 Pfauter Italia S.P.A. Dispositif de dressage pour des outils de meulage sous forme de vis sans fin dans des machines à meuler des roues d'engrenage
EP0417050A3 (en) * 1989-09-07 1992-05-27 C.I.M.A. Costruzioni Italiane Macchine Attrezzi S.P.A. Equipment for dressing worm type grinding tools in gear grinding machinery
GB2348837A (en) * 1996-06-15 2000-10-18 Unova Uk Ltd Grinding machine
GB2348837B (en) * 1996-06-15 2001-01-17 Unova Uk Ltd Improvements in and relating to grinding and polishing machines
CN102218682A (zh) * 2011-03-24 2011-10-19 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

Also Published As

Publication number Publication date
DE3136240A1 (de) 1983-03-31
EP0074518A3 (en) 1983-07-20
JPS5882662A (ja) 1983-05-18
EP0074518B1 (fr) 1986-01-29
EP0074518B2 (fr) 1989-04-05
DE3268825D1 (en) 1986-03-13

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