EP0054214A1 - Procédé de dressage de meules et dispositif à cet effet - Google Patents

Procédé de dressage de meules et dispositif à cet effet Download PDF

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Publication number
EP0054214A1
EP0054214A1 EP81110024A EP81110024A EP0054214A1 EP 0054214 A1 EP0054214 A1 EP 0054214A1 EP 81110024 A EP81110024 A EP 81110024A EP 81110024 A EP81110024 A EP 81110024A EP 0054214 A1 EP0054214 A1 EP 0054214A1
Authority
EP
European Patent Office
Prior art keywords
grinding wheel
roller
grinding
ratio
feed
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
EP81110024A
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German (de)
English (en)
Other versions
EP0054214B1 (fr
Inventor
Jaroslav Vlk
Johannes Woynowski
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.)
Gebr Maegerle AG
Original Assignee
Gebr Maegerle AG
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Filing date
Publication date
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Application filed by Gebr Maegerle AG filed Critical Gebr Maegerle AG
Priority to AT81110024T priority Critical patent/ATE12603T1/de
Publication of EP0054214A1 publication Critical patent/EP0054214A1/fr
Application granted granted Critical
Publication of EP0054214B1 publication Critical patent/EP0054214B1/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
    • B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
    • 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
    • B24B53/06—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels
    • B24B53/07—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels by means of forming tools having a shape complementary to that to be produced, e.g. blocks, profile rolls

Definitions

  • the present invention relates to a method for processing grinding wheels with a processing roller, a device for carrying it out, and a use of the method.
  • the peripheral speed r R . ⁇ R of the roller is equal to the peripheral speed r S .w S of the grinding wheel.
  • a sufficient pressure between the roller and the grinding wheel exceeds the compressive strength of the binding agent on the grinding wheel and individual grains are broken out of the grinding wheel. This pressure processes the grinding wheel onto the negative form of the crushing roller.
  • the surface quality of the grinding wheel which corresponds to the grinding wheel grit, cannot be influenced. It is relatively rough and results in a correspondingly rough workpiece surface during the grinding process.
  • the second method known as roller diamond coating, which uses the former in addition, a diamond-coated preparation roller is used, a so-called diamond roller.
  • the diamond roller is moved at a different speed than the grinding wheel, so that due to its relative movement, the diamonds cut off the grinding wheel grains. With this method, the grinding wheel surface becomes much smoother than in the first method, depending on the relative speed ratio chosen.
  • the purpose of the present invention is to achieve that the advantages of the two conventional methods can be combined in one with a single preparation roller.
  • the grinding machine 1 comprises a stable support frame 3, on the upper side of which, the actual grinding machine bed 5, a machine table 7 is mounted so as to be longitudinally displaceable. Perched vertically, a stand 9 is arranged on a longitudinal side of the basically cube-shaped support frame 3, stably connected to the latter, on which a vertical support 11 is mounted vertically, ie displaceably perpendicular to the machine table 7.
  • the vertical support 11 projects parallel to the table 7 above the latter and forms the support for a horizontal support 13 arranged horizontally displaceably thereon.
  • the horizontal support 13 is thus movable parallel to the plane of the table 7 and perpendicular to its one degree of freedom.
  • a console 17 which projects downward parallel to the stand 9 and on which a grinding wheel 19 and a processing roller 21 for the grinding wheel 19 are mounted.
  • the grinding wheel 19 is, of course, rotatably mounted on the console 17 about an axis parallel to the table 7 and perpendicular to its degree of freedom, while the processing roller 21, in addition to its rotatable mounting, is designed to carry out a translatory movement, preferably parallel to the stand 9, so that it can be used the grinding wheel 19 can be brought into contact.
  • a carrier element 23 which projects downward beyond the console to such an extent that its end comes to lie at the height of the grinding wheel working area 25. At this end there is a water nozzle 27, directed towards the work area.
  • FIG. 1 makes no claim whatsoever to want to show construction features, but serves, in addition to the definition of terms, of the representation of how the individual grinding machine assemblies are movable relative to one another.
  • FIG. 2 shows the arrangement according to FIG. 1 in a highly schematic manner.
  • the corresponding modules have the same position symbols.
  • the individual relative movements of the assemblies and their possible dependencies are to be explained on the basis of this figure.
  • the vertical support 11 guides the grinding wheel 19 to a workpiece 29 during the grinding process. This corresponds to the movement according to arrow A in FIG. 1.
  • the table 7 serves the horizontal support 13, which supports the console 17. This corresponds to the movement according to arrow B in FIG. 1.
  • the processing roller 21 in turn on the bracket 17 translationally, for example movable parallel to the carrier 9 according to the arrow C of FIG. 1, serves to reprocess a worn grinding wheel 19 with respect to its profile and also its surface quality.
  • a zero value specification 31 is arranged on a stationary assembly, be it on the stand 9 or on the support frame 3. It protrudes parallel to the stator 9 and is operatively connected to a zero value sensor 33 lying vertically above it, which at least in the vertical direction, i.e. is moved parallel to the stand 9 synchronously with the grinding wheel 19.
  • the zero value sensor 33 can be attached to the bracket 17 or directly to the vertical support 11.
  • the zero value specification 31 with a stop 35 for the sensor 33 is set such that the sensor 33 then touches the stop 35 when the grinding wheel 19 has ground the workpiece 29 down to its desired value.
  • this is shown in FIG. 2 in such a way that the zero sensor 33 projects down to the height of the grinding wheel working area 25 and thus the stop 35 is set exactly to the desired value height of the workpiece 29 being processed.
  • the original height is shown in dashed lines on the workpiece.
  • the grinding wheel diameter D is reduced.
  • X S0 the shortest distance from the vertical support 11 to the grinding area of the disc 19 before the start of work X s0 , it is X ' S0 after preparation, where X S0 ⁇ X' S0 .
  • the difference between these two quantities corresponds to half D of the grinding wheel 19. If urchmesserabddling now with unchanged setting of the zero value input 31 and the zero-value sensor ground 33 with the now recycled grinding wheel 19, the workpiece would be processed deep 29 by half the diameter decrease slightly.
  • the setpoint In order to always work the workpiece down to the same height, the setpoint, either the height of the zero value specification 31 must be reduced in accordance with the radius decrease of the grinding wheel 19, or the zero value sensor 33 must be placed on the new working area of the grinding wheel 19 or . can be adjusted by reducing the radius against the axis of rotation of the grinding wheel.
  • the processing roll 21 has before it first occurs with the grinding wheel 19 in contact, the distance between the roller periphery and disc periphery cover, which according to FIG 2 by the distance is represents -. - since r ge (X SO X RO).
  • the distance X S0 will increase in X ' S0 , so that for the preparation roll feed the information must be stored as to how much the wheel 19 has been processed in the immediately preceding preparation process.
  • a water nozzle 27 is directed onto the working area 25 of the grinding wheel 19, as has already been explained with reference to FIG. 1. So that the alignment of its cooling jet always remains precisely aligned to this area 25, the nozzle 27 must be moved up with respect to the vertical support 11 by exactly the amount that the conditioning roller 21 has removed from the grinding wheel 19.
  • FIG. 3 shows in a signal flow diagram how the compensation of the grinding wheel removal can be carried out.
  • the information I is preferably in the form of electrical signals.
  • a sensor 38 a for detecting X RO a sensor 38 b for detecting X S0 and an input device 38 c for the roll feed are basically provided.
  • the sensors 38, 38 b can be designed as opto-electrical converters, the input device 38 c as a ramp generator with ramp slope that can be input in analog or digital form.
  • a first superposition unit 37 when a first-time preparation process is triggered, for example with the buttons 36, the information I (X R0 ) and I (X S0 ) are compared with one another after being stored in memories 40 a , 40 b , and the difference result ⁇ I is fed to a second superposition unit 39 .
  • this difference information ⁇ I is superimposed with the information I v (t), which is applied, for example, with the switch 36 a , and the result is fed to a converter unit 41, which converts this information into a mechanical displacement X R (t) for the processing roller 21.
  • the converter 41 is an electromechanical converter, for example an electric motor arrangement. In order to register the decrease in diameter of the grinding wheel 19 which occurs in the preparation process thus effected, the information I V (t) becomes fundamental checked in a unit 43 for an extreme point.
  • a switch unit 45 is closed, so that the instantaneous value of the information T V (t) is then entered into a storage unit 47. Since this instantaneous information corresponds to the radius decrease of the grinding wheel 19 and thus must be added to the original default value I (X S0 ) in a next preparation process, the output of the memory 47 is fed to the superposition unit 37.
  • the content of the memory 47 also corresponds to the information on how far both the water nozzle and the zero value setting must be compensated. The memory content is therefore supplied to at least one further converter 49, via which the said compensations are carried out.
  • the signal flow diagram shown in FIG. 3 is only intended to show a basic possibility of carrying out the necessary compensations and feed movements. It goes without saying that a large number of possible modifications can be made which aim for the same effect.
  • the ratio 1 which would result in a maximum grinding wheel roughness and thus cutting ability, the The grinding wheel cannot be profiled, since the latter would only be broken out at the contact points with the diamond and the binding agent of the diamond roller would be damaged as soon as it came into contact with the grinding wheel during profiling, which would result in the diamond failing.
  • a ratio less than 1, according to FIG. 4, for example of 0.75 practically the entire grinding wheel surface is profiled by the diamonds because of the relative speed of the roller and grinding wheel circumference, which would not be the case with a ratio of 1.
  • the diamond roller is not damaged and this speed ratio allows a good profile, but the grinding wheel will not have the optimal cutting ability.
  • the aim must also be to achieve an optimal cutting ability corresponding to R at the peripheral speed ratio 1 with the diamond roller. In terms of the method, this is now achieved by profiling the grinding wheel in a first preparation process with the peripheral speed ratio of at least almost 0.75 and then making it sleek with the ratio of at least almost 1.
  • the grinding machine according to FIG. 1 enables automatic execution of the process steps of points I and II (FIG. 4) and, if desired, of point III.
  • FIG. 5 shows a functional block diagram for the automatic execution of the processing method described above.
  • the grinding wheel drive 51 By closing a start switch 50, the grinding wheel drive 51 and, with the switch 53 closed, the roller feed drive 55 and the roller drive 57 are started.
  • the processing roller 59 of the grinding wheel 61 becomes corresponding to the roller feed path XR (t) (cf. FIG. 3) fed.
  • the portion of X R (t) which the diameter resp. Radius decrease AD corresponds to the grinding wheel 61.
  • This value ⁇ D is checked in a first comparison unit 65 to determine whether it is larger or smaller than a predetermined threshold value ⁇ D 1 . If it is smaller, the roller drive 57 and the grinding wheel drive 51 are controlled via a first ratio control unit 67 in accordance with the peripheral speed ratio of point I of FIG. 4, this unit 67 preferably continuously adjusting the rotation speeds ⁇ R corresponding to ⁇ D, respectively.
  • ⁇ S of role resp. Disc By closing a start switch 50, the grinding wheel drive
  • the diameter decrease ⁇ D is greater than the predetermined first threshold value ⁇ D 1 , then it is compared in a second comparison unit 69 with a second predetermined threshold value ⁇ D 2 and, if it is smaller than this threshold value, the two drive units 57 and 51 are compared via a second ratio Control unit 71 driven according to the peripheral speed ratio of point II of FIG. 4.
  • the threshold value ⁇ D 1 thus corresponds to a predetermined profiling depth and the threshold value ⁇ D 2 corresponds to the grinding wheel dimension to be achieved during the cutting.
  • a switching unit 73 is operated, which connects via a switch 75, a control unit 77 for the grinding process with the grinding wheel drive 51, and which opens the switch 53 so that the R cllenantrieb 57 and the roller delivery drive are stopped 55th
  • the preparation roll is now lifted off the grinding wheel.
  • the grinding process which is now triggered automatically and is controlled by the unit 77, causes the vertical support of the machine to be advanced by means of its drive group 79.
  • This feed movement is sensed by a detector 81, for example a potentiometer, and fed to a further comparison unit 83. If the vertical support feed reaches a predetermined threshold value V 0 , the profile grinding process is completed and the switchover unit 73 is reset. The control of the grinding machine drive by the unit 77 is interrupted again and with the closing switch 53 both the drive 55 for the roller feed and the roller drive 57 are started again. The grinding wheel drive always remains started. Since the diameter decrease sensed by the detector 63 is now greater than ⁇ D 2 and a switch 85 has been closed when the threshold value V o for the vertical feed has been reached, the peripheral speed ratio of the roller and grinding wheel is controlled by a further ratio control unit 87, corresponding to the ratio of the point III in Fig. 4.
  • the switching unit 73 is triggered again, whereby the last preparation step on the grinding wheel is ended and the fine grinding process is started. Then, when the final finished dimension for the workpiece is reached, its processing is terminated by opening switch 50.
  • the two units 89 and 91 alternatively feed the corresponding control signals from the ratio control units 67 and 71 or 87 to the drives 57 and 51, or feed the control signals from the control unit 77 to the drive 51 during the grinding process.
  • the roller feed drive 55 as indicated by the return lines 93, is influenced by the control units 67, 71 and 87, depending on the peripheral speed ratio kept constant there. Depending on this ratio, the roll feed can take place only slowly or more quickly, as has been explained with reference to FIG. 4.
  • control functions described with reference to FIG. 5 can be carried out by conventionally constructed function blocks in analog, digital or hybrid technology.
  • a process computer is particularly suitable for this if additional monitoring, regulating and control functions are to be automated.
  • the described method allows with appropriate control, such as 4, also automatically with a continuously adjustable speed of the preparation roller and / or grinding wheel, preferably with a diamond roller, to profile the grinding wheel and then to make it sleek.
  • the same diamond roller can then be used in a further preparation process to prepare the grinding wheel for fine grinding.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
EP81110024A 1980-12-11 1981-12-01 Procédé de dressage de meules et dispositif à cet effet Expired EP0054214B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81110024T ATE12603T1 (de) 1980-12-11 1981-12-01 Verfahren zum aufbereiten von schleifscheiben und vorrichtung zu dessen ausfuehrung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH916180 1980-12-11
CH9161/80 1980-12-11

Publications (2)

Publication Number Publication Date
EP0054214A1 true EP0054214A1 (fr) 1982-06-23
EP0054214B1 EP0054214B1 (fr) 1985-04-10

Family

ID=4349000

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81110024A Expired EP0054214B1 (fr) 1980-12-11 1981-12-01 Procédé de dressage de meules et dispositif à cet effet

Country Status (5)

Country Link
US (1) US4458660A (fr)
EP (1) EP0054214B1 (fr)
JP (1) JPS57168863A (fr)
AT (1) ATE12603T1 (fr)
DE (1) DE3169891D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMO20100070A1 (it) * 2010-03-17 2011-09-18 Giuseppe Soli Macchina per il taglio e/o la profilatura di manufatti sostanzialmente lastriformi

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2193127A (en) * 1986-08-01 1988-02-03 Unicorn Ind Plc Dressing of grinding wheels
GB2343133A (en) * 1998-09-09 2000-05-03 Renold Plc Dressing grinding wheels
JP2000237957A (ja) * 1999-02-22 2000-09-05 Hitachi Seiki Co Ltd 研削盤
JP3844420B2 (ja) * 2000-09-04 2006-11-15 株式会社牧野フライス製作所 マシニングセンタ及びその工具交換方法
AT412197B (de) * 2002-11-22 2004-11-25 Lisec Peter Vorrichtung zum bearbeiten von werkstoffplatten
CN103894930B (zh) * 2014-04-18 2016-04-20 环球石材（福建）有限公司 一种磨轮的成型及修磨专用设备

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2664681A (en) * 1948-07-19 1954-01-05 Robert J Hood Method of dressing diamond wheels
FR1070546A (fr) * 1952-10-31 1954-07-28 Diamant Boart Sa Procédé de rectification des meules et dispositif pour la mise en oeuvre de ce procédé
US2775078A (en) * 1955-06-17 1956-12-25 Ncr Co Method and apparatus for forming grinding wheels
USRE24448E (en) * 1958-04-01 Method of grinding
US2877758A (en) * 1954-01-06 1959-03-17 Sheffield Cleveland Corp Machine tool
US3006332A (en) * 1958-10-10 1961-10-31 Norton Co Powered rotary truing device
FR1316314A (fr) * 1962-02-28 1963-01-25 Herminghausen Werke G M B H Procédé et dispositif pour le dressage répété de la meule de rectifieuses de précision, notamment de machines sans centre à rectifier les surfaces cylindriques
US3204628A (en) * 1963-05-08 1965-09-07 Magerle Karl Grinding device having integrally mounted means for profiling the grinding wheel
US3695249A (en) * 1970-08-12 1972-10-03 Henry F Swenson Grinding wheel dressing apparatus
GB1440868A (en) * 1974-04-29 1976-06-30 Winter & Sohn Ernst Method of and apparatus for dressing and sharpening grinding wheels
US4222362A (en) * 1979-04-02 1980-09-16 Litton Industrial Products, Inc. Speed control for a rotary dressing wheel

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3584616A (en) * 1968-08-08 1971-06-15 Landis Tool Co Truing mechanism for grinding wheels
DE2321477C3 (de) * 1973-04-27 1979-11-15 Ernst Winter & Sohn, 2000 Hamburg Verfahren und Vorrichtung zum Abrichten und Schärfen von Schleifscheiben
JPS5834257B2 (ja) * 1978-04-27 1983-07-26 豊田工機株式会社 ロ−タリドレツサによる砥石ドレツシング方法及び装置

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE24448E (en) * 1958-04-01 Method of grinding
US2664681A (en) * 1948-07-19 1954-01-05 Robert J Hood Method of dressing diamond wheels
FR1070546A (fr) * 1952-10-31 1954-07-28 Diamant Boart Sa Procédé de rectification des meules et dispositif pour la mise en oeuvre de ce procédé
US2877758A (en) * 1954-01-06 1959-03-17 Sheffield Cleveland Corp Machine tool
US2775078A (en) * 1955-06-17 1956-12-25 Ncr Co Method and apparatus for forming grinding wheels
US3006332A (en) * 1958-10-10 1961-10-31 Norton Co Powered rotary truing device
FR1316314A (fr) * 1962-02-28 1963-01-25 Herminghausen Werke G M B H Procédé et dispositif pour le dressage répété de la meule de rectifieuses de précision, notamment de machines sans centre à rectifier les surfaces cylindriques
US3204628A (en) * 1963-05-08 1965-09-07 Magerle Karl Grinding device having integrally mounted means for profiling the grinding wheel
US3695249A (en) * 1970-08-12 1972-10-03 Henry F Swenson Grinding wheel dressing apparatus
GB1440868A (en) * 1974-04-29 1976-06-30 Winter & Sohn Ernst Method of and apparatus for dressing and sharpening grinding wheels
US4222362A (en) * 1979-04-02 1980-09-16 Litton Industrial Products, Inc. Speed control for a rotary dressing wheel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMO20100070A1 (it) * 2010-03-17 2011-09-18 Giuseppe Soli Macchina per il taglio e/o la profilatura di manufatti sostanzialmente lastriformi

Also Published As

Publication number Publication date
US4458660A (en) 1984-07-10
JPS57168863A (en) 1982-10-18
ATE12603T1 (de) 1985-04-15
DE3169891D1 (en) 1985-05-15
EP0054214B1 (fr) 1985-04-10

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