EP0074518B2 - Präzisionsschleifmaschine, insbesondere Projektions- Formenschleifmaschine - Google Patents

Präzisionsschleifmaschine, insbesondere Projektions- Formenschleifmaschine Download PDF

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Publication number
EP0074518B2
EP0074518B2 EP82107665A EP82107665A EP0074518B2 EP 0074518 B2 EP0074518 B2 EP 0074518B2 EP 82107665 A EP82107665 A EP 82107665A EP 82107665 A EP82107665 A EP 82107665A EP 0074518 B2 EP0074518 B2 EP 0074518B2
Authority
EP
European Patent Office
Prior art keywords
grinding wheel
grinding
dressing
workpiece
dressing member
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
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German (de)
English (en)
French (fr)
Other versions
EP0074518B1 (de
EP0074518A2 (de
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
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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(B2) "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/de
Publication of EP0074518A3 publication Critical patent/EP0074518A3/de
Publication of EP0074518B1 publication Critical patent/EP0074518B1/de
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Publication of EP0074518B2 publication Critical patent/EP0074518B2/de
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
    • 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 projection shape grinding machine for surface shape grinding, with a grinding wheel processing a workpiece, as specified in the preamble of claim 1.
  • the contour of the machined workpiece can be observed on a projection screen and the grinding wheel can be guided along this contour by hand along a desired shape line. Wear of the grinding wheel during operation can be easily corrected visually.
  • a cylindrical grinding machine (DE-A-23 53 833) it is known to use a substantially cylindrical dressing roller for dressing the cylindrical grinding surface of the grinding wheel.
  • the dressing roller is fed mechanically by hand against the grinding wheel.
  • the grinding wheel is fed by a stepper motor according to the dressing amount.
  • This known machine is not designed and is not suitable for a projection form grinding machine for flat form grinding, in which the grinding wheel executes a reciprocating movement.
  • a profiled dressing roller is arranged as a dressing body on the side of the grinding wheel opposite the workpiece.
  • a slide carrying the regulating wheel and a slide holding the workpiece can each be advanced in the direction of the grinding wheel by means of two synchronously driven stepper motors. This arrangement cannot be transferred to a projection form grinding machine for surface form grinding, in which the grinding wheel executes a reciprocating movement.
  • a numerically controllable profile grinding machine which has two parallel, mutually adjustable grinding spindles, each with several profiled grinding wheels.
  • Profiled dressing rollers which can be fed to the grinding wheels, are also used as dressing bodies. After the grinding wheels have been dressed, the two grinding spindles are moved against each other to the extent necessary so that the workpiece moved between the two sets of grinding wheels receives the required contour and dimensions.
  • 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 invention is based on the object of designing the dressing process 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 take place 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 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 lifting movement of the grinding wheel can be used to guide the grinding wheel over the entire length of the profile groove in the dressing body, so that the Grinding wheel from different areas of the profile groove is ground in succession. This significantly reduces the wear of the dressing body.
  • 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.
  • the projection screen 12 is normally a transparent support is placed, which contains the target shape curve, so that you can immediately compare the actual shape of the workpiece 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 On its side facing the grinding wheel, the dressing body 26 has a professional 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 practically 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 Präzisionsschleifmaschine, insbesondere Projektions- Formenschleifmaschine Expired EP0074518B2 (de)

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 (de) 1983-03-23
EP0074518A3 EP0074518A3 (en) 1983-07-20
EP0074518B1 EP0074518B1 (de) 1986-01-29
EP0074518B2 true EP0074518B2 (de) 1989-04-05

Family

ID=6141500

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82107665A Expired EP0074518B2 (de) 1981-09-12 1982-08-21 Präzisionsschleifmaschine, insbesondere Projektions- Formenschleifmaschine

Country Status (3)

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

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 (ja) * 1985-02-22 1986-09-01
JPH0123728Y2 (ja) * 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 (ja) *
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
EP0074518B1 (de) 1986-01-29
EP0074518A2 (de) 1983-03-23
DE3268825D1 (en) 1986-03-13
DE3136240A1 (de) 1983-03-31
EP0074518A3 (en) 1983-07-20
JPS5882662A (ja) 1983-05-18

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