EP0321971B1 - Verfahren zum Abrichten von Schleifscheiben - Google Patents

Verfahren zum Abrichten von Schleifscheiben Download PDF

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Publication number
EP0321971B1
EP0321971B1 EP88121445A EP88121445A EP0321971B1 EP 0321971 B1 EP0321971 B1 EP 0321971B1 EP 88121445 A EP88121445 A EP 88121445A EP 88121445 A EP88121445 A EP 88121445A EP 0321971 B1 EP0321971 B1 EP 0321971B1
Authority
EP
European Patent Office
Prior art keywords
dressing
speed
grinding wheel
cbn
grains
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
EP88121445A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0321971A3 (en
EP0321971A2 (de
Inventor
Horst Josef Dr.-Ing. Wedeniwski
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.)
Fortuna Werke Maschinenfabrik GmbH
Original Assignee
Fortuna Werke Maschinenfabrik 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
Application filed by Fortuna Werke Maschinenfabrik GmbH filed Critical Fortuna Werke Maschinenfabrik GmbH
Publication of EP0321971A2 publication Critical patent/EP0321971A2/de
Publication of EP0321971A3 publication Critical patent/EP0321971A3/de
Application granted granted Critical
Publication of EP0321971B1 publication Critical patent/EP0321971B1/de
Anticipated expiration legal-status Critical
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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
    • B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
    • B24B53/04—Devices or means for dressing or conditioning abrasive surfaces of cylindrical or conical surfaces on abrasive tools or wheels
    • B24B53/053—Devices or means for dressing or conditioning abrasive surfaces of cylindrical or conical surfaces on abrasive tools or wheels using a rotary dressing tool
    • 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
    • B24B53/00—Devices or means for dressing or conditioning abrasive surfaces

Definitions

  • the invention relates to a method for dressing grinding wheels, the surface of which is provided with an investment material for CBN grains, in which a rotating dressing roller is guided along the counter-rotating surface of the grinding wheel (see, for example, WO-A-8 701 065).
  • dressing rollers It is known to recondition worn grinding wheels by running a dressing roller along their surface.
  • the surface of the dressing roller is provided with diamonds which, when dressing, engage the worn surface of the grinding wheel and produce a sharp surface there again by crushing the grinding wheel material crystals or grains.
  • Dressing rollers are usually guided against the grinding surface at a slight angle of attack of, for example, 10 ° and are advanced with a feed of, for example, 0.02 to 0.03 mm per revolution.
  • CBN Cubic Boron Nitride
  • the invention is therefore based on the object of developing a method of the type mentioned in such a way that the grinding surface of a CBN grinding wheel is optimally sharpened again with little expenditure of time.
  • the dressing roller is guided at least twice along the surface, the first guide being carried out at a first, high feed rate, in such a way that dressing crystals of the dressing roller deflect the CBN grains elastically, but on the other hand reset the investment material, while the second guidance takes place at a second, lower feed rate in such a way that the dressing crystals shatter the CBN grains at their tips.
  • the worn grinding wheel has rounded CBN grains on the outer circumference of its grinding surface and the spaces between the CBN grains are either filled with smeared workpiece material or with investment material, so that overall there is only a surface with very small depressions with rounded, protruding CBN grains is.
  • the CBN grains are now only deflected elastically by the dressing crystals of the dressing roller because the feed speed of the dressing roller has been set relatively high.
  • the investment material between the CBN grains, the so-called grain binding, is reset, by initiating a dressing force Fo.
  • the grinding wheel has a peripheral speed of 25 to 40 m / s, preferably 35 m / s, the peripheral speed of the dressing roller is between - 25 and - 40 m / s, preferably - 32 m / s, the first Speed is set to 300 to 900 mm / min, preferably 400 mm / min, the second speed, however, is set to 100 to 400 mm / min, preferably 150 mm / min, in particular the value pairs of dressing roller circumferential speed and grinding wheel circumferential speed are selected in this way that their quotient is between 0.75 and 0.95, preferably 0.92.
  • a truncated-cone-shaped dressing roller is used, which lies with the circumferential line in the transition between the conical surfaces on the surface.
  • This measure has the advantage that the dressing roller in turn rests with a pointed edge on the surface of the grinding wheel and therefore material removal is particularly successful when the binding or splitting of the CBN grains is reset.
  • the dressing roller is guided along a surface line of the surface at the first speed and at the second speed.
  • 10 is a total of a grinding wheel, as can be used for example for external cylindrical grinding or for profile grinding.
  • the grinding wheel has a diameter of approximately 600 mm and a width of approximately 24 mm.
  • the grinding wheel 10 which is worn on its surface after a long period of use, is dressed by means of a dressing roller 11, which is rotatable about an axis 12.
  • the axis 12 runs parallel to the axis of the grinding wheel 10 or is slightly inclined relative to the latter.
  • An arrow 13 indicates an example of a direction of rotation of the grinding wheel 10.
  • An arrow 14 shows that the dressing roller 11 rotates in the same direction or in the opposite direction to the grinding wheel 10.
  • an arrow 15 indicates that the dressing roller 11 can be moved back and forth in the direction of its axis 12 over a surface 16 of the grinding wheel 10.
  • the dressing roller 11 is preferably double-conical, two conical surfaces 17 converging approximately in a central plane of the dressing roller 11 in a sharp circumferential line 18 with which the dressing roller 11 lies against the surface 16 of the grinding wheel 10. In the area of this circumferential line 18, the dressing roller 11 is set with diamonds in a manner known per se.
  • the circumferential speed on the circumference of the grinding wheel 10 is designated with v 1.
  • the peripheral speed v1 is preferably 35 m / s, but can also vary in a range from about 25 to 40 m / s.
  • the circumferential speed of the dressing roller 11 is designated with v2.
  • the peripheral speed v2 of the dressing roller 11 is preferably - 32 m / s, but can also vary in the range from - 10 to - 40 m / s.
  • the minus sign is intended to indicate that the circumferential speed vectors v 1 and v 2 at the point of contact of the dressing roller 11 on the grinding wheel 10 run in opposite directions to one another.
  • the dressing roller 11 can, for example, be attached to the left edge of the width of the surface 16 of the grinding wheel 10 in FIG. 2 and be moved to the right from there at a first, high feed rate v 3.
  • This first feed rate is preferably 400 mm / min, but can vary in the range between 300 and 900 mm / min.
  • the feed of the dressing roller 11 is reversed so that it runs again to the left at a second, lower feed speed v4.
  • the dressing roller 11 sweeps over the same surface line on the surface 16, which it had already covered v3 at the feed rate at the feed rate.
  • the second, lower feed speed v4 is preferably 150 mm / min, but can also vary in the range between 100 and 400 mm / min.
  • Fig. 3 shows the surface of the grinding wheel 10 on a greatly enlarged scale.
  • CBN grains 20 are embedded in a ceramic bond 21, which serves as an investment.
  • Fig. 3 shows the grinding wheel 10 in the worn state, in which tips 22 of the CBN grains 20 are already largely rounded. There are also no more gaps between the tips 22 of adjacent CBN grains 20, either because the CBN grains 20 have worn down to a first surface 23 of the bond 21 or because these gaps have filled with material of the machined workpiece.
  • a relatively high feed speed v 3 is now achieved that the diamonds on the circumferential line 18 of the dressing roller 11 pass the surface of the grinding wheel 10 at a relatively high speed.
  • the feed speed v3 is set depending on the modulus of elasticity of the CBN grinding wheel 10 so that when the dressing roller 11 runs with the high feed speed v3, the diamonds on the circumferential line 18 grip the CBN grains 20 in their elastic region.
  • Fig. 4 shows that a dressing force F Q 'can be set according to the amount and direction on the peripheral speeds v2 and v3.
  • the CBN grains 20 are displaced by the dressing force V Q 'shown in Fig. 4'.
  • the binding 21 is on this Way "reset", ie reduced by a first area 24 on the circumference, which is shown in dashed lines in Fig. 4.
  • the CBN grains 20 now protrude far beyond the second surface 25 and there is enough space between the CBN grains 20 to pick up material removed from a workpiece to be machined.
  • the shape of the chip spaces also ensures that chips cannot penetrate into the binding 21.
  • a grinding wheel 10 is obtained with a surface on which again sharp-edged CBN grains 20 project far beyond a surface 25 of the embedding ceramic 21, so that the grinding wheel 10 can again work effectively on a workpiece and achieve high machining rates.
  • the dressing roller 11 can not only be guided along a surface line of the grinding wheel 10, but also that it can be guided along a straight line or another line that is slightly inclined to a surface line.
  • a synthetic resin or a metal e.g. a sintered or galvanized metal.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
EP88121445A 1987-12-23 1988-12-22 Verfahren zum Abrichten von Schleifscheiben Expired - Lifetime EP0321971B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3743812 1987-12-23
DE3743812 1987-12-23
DE3811782A DE3811782A1 (de) 1987-12-23 1988-04-08 Verfahren zum abrichten von schleifscheiben
DE3811782 1988-04-08

Publications (3)

Publication Number Publication Date
EP0321971A2 EP0321971A2 (de) 1989-06-28
EP0321971A3 EP0321971A3 (en) 1990-08-16
EP0321971B1 true EP0321971B1 (de) 1993-03-24

Family

ID=25863160

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88121445A Expired - Lifetime EP0321971B1 (de) 1987-12-23 1988-12-22 Verfahren zum Abrichten von Schleifscheiben

Country Status (4)

Country Link
US (1) US4920945A (enrdf_load_stackoverflow)
EP (1) EP0321971B1 (enrdf_load_stackoverflow)
JP (1) JPH01216772A (enrdf_load_stackoverflow)
DE (2) DE3811782A1 (enrdf_load_stackoverflow)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3942285C1 (en) * 1989-12-21 1991-04-25 Naxos-Union Schleifmittel- Und Schleifmaschinenfabrik Ag, 6000 Frankfurt, De Dressing rotating grinding plate - by locating diamond dressing plate parallel to grinding plate and contacting both plates for specified period
CH684581A5 (de) * 1990-11-07 1994-10-31 Reishauer Ag Verfahren und Vorrichtung zum Profilieren von Schleifscheiben.
US5622526A (en) * 1994-03-28 1997-04-22 J. D. Phillips Corporation Apparatus for trueing CBN abrasive belts and grinding wheels
JP3052190B2 (ja) * 1996-05-23 2000-06-12 セイコー精機株式会社 砥石の修正方法およびその装置
US6113474A (en) * 1997-10-01 2000-09-05 Cummins Engine Company, Inc. Constant force truing and dressing apparatus and method
US8915768B2 (en) * 2008-07-31 2014-12-23 Mitsubishi Heavy Industries, Ltd. Method of phasing threaded grinding stone, as well as device therefor
FR2963268B1 (fr) * 2010-07-27 2015-03-13 Areva Nc Dispositif d'avivage de meule de travail et son utilisation dans une rectifieuse sans centre de pastilles de combustible nucleaire
JP6127657B2 (ja) * 2013-03-29 2017-05-17 株式会社ジェイテクト 回転砥石のツルーイング方法及びそのツルーイング方法を実施するための研削盤

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR963809A (enrdf_load_stackoverflow) * 1947-07-11 1950-07-21
US2664681A (en) * 1948-07-19 1954-01-05 Robert J Hood Method of dressing diamond wheels
DE1123945B (de) * 1957-09-11 1962-02-15 Bosch Gmbh Robert Verfahren und Vorrichtung zum Abrichten von Schleifscheiben
GB1011630A (en) * 1963-11-11 1965-12-01 Povazske Strojarne Np Improvements in or relating to devices for dressing v-shaped grinding wheels
US3584616A (en) * 1968-08-08 1971-06-15 Landis Tool Co Truing mechanism for grinding wheels
JPS5852788B2 (ja) * 1975-06-30 1983-11-25 豊田工機株式会社 トイシグルマセイケイソウチ
US4073281A (en) * 1975-09-29 1978-02-14 Toyoda-Koki Kabushiki-Kaisha Truing and dressing apparatus for grinding wheels
JPS585148B2 (ja) * 1976-10-15 1983-01-29 豊田工機株式会社 砥石車の修正方法および装置
JPS60150965A (ja) * 1984-01-17 1985-08-08 F S K:Kk 超砥粒砥石の総形ドレツシング方法
GB8520421D0 (en) * 1985-08-14 1985-09-18 Ford Motor Co Honing
JP2539801B2 (ja) * 1986-12-10 1996-10-02 豊田工機株式会社 砥石のツル―イング装置

Also Published As

Publication number Publication date
DE3879646D1 (de) 1993-04-29
JPH01216772A (ja) 1989-08-30
DE3811782C2 (enrdf_load_stackoverflow) 1989-10-05
JPH0579464B2 (enrdf_load_stackoverflow) 1993-11-02
US4920945A (en) 1990-05-01
EP0321971A3 (en) 1990-08-16
EP0321971A2 (de) 1989-06-28
DE3811782A1 (de) 1989-07-06

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