EP2036671A1 - Verfahren und Vorrichtung zum Abrichten oder Richten einer Diamantschleifscheibe - Google Patents

Verfahren und Vorrichtung zum Abrichten oder Richten einer Diamantschleifscheibe Download PDF

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Publication number
EP2036671A1
EP2036671A1 EP07116112A EP07116112A EP2036671A1 EP 2036671 A1 EP2036671 A1 EP 2036671A1 EP 07116112 A EP07116112 A EP 07116112A EP 07116112 A EP07116112 A EP 07116112A EP 2036671 A1 EP2036671 A1 EP 2036671A1
Authority
EP
European Patent Office
Prior art keywords
grinding wheel
wheel
grinding
sensor
position detector
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.)
Withdrawn
Application number
EP07116112A
Other languages
English (en)
French (fr)
Inventor
Martial Gremaud
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.)
Rollomatic SA
Original Assignee
Rollomatic SA
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 Rollomatic SA filed Critical Rollomatic SA
Priority to EP07116112A priority Critical patent/EP2036671A1/de
Priority to PCT/IB2008/053636 priority patent/WO2009034523A1/fr
Priority to TW97134726A priority patent/TW200927381A/zh
Publication of EP2036671A1 publication Critical patent/EP2036671A1/de
Withdrawn legal-status Critical Current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
    • 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
    • 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
    • B24B49/186—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 taking regard of the wear of the 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
    • 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
    • B24B53/06—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels
    • B24B53/062—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels using rotary dressing tools

Definitions

  • German patent application DE 102 49 358 filed on 23 October 2002 indicates some of the difficulties encountered in solving this problem and proposes a combination of means which requires, after having determined the final set value of the position of the axis of the wheel to be trained and the desired diameter for this wheel, and therefore the value must have the radius of the grinding wheel at the end of the operation, to place a sensor opposite the point where the grinding wheel and grinding wheel touch, to choose a starting position for this sensor and for the axis of the grinding wheel, and to move at the same time the grinding wheel and the sensor, the latter of a value twice that of the axis of the grinding wheel at each movement, until the sensor touches the periphery of the grinding wheel.
  • the operation can be interrupted.
  • This method avoids the need for continuous visual observation of the point of contact between the grinding wheel and the grinding wheel, which, due to the presence of the lubricants, is not possible with sufficient accuracy. However, it does not allow to control the progress of the process between the moment of departure of the operation and that of obtaining the radius (or any other form) desired for the wheel to be trained.
  • the present invention provides a method and a device for achieving the same purpose as known methods and devices, but also offering wider management possibilities for the training operation and implementing simpler means, while allowing a much greater accuracy in the results, and avoiding visual observation by means of cameras.
  • the present invention relates to a method and a device as defined by the appended claims.
  • a working grinding wheel 16 is used in a softer material and therefore subjected to a certain amount of wear. It is necessary to periodically check the value of its radius.
  • a position detector 20 comprising a diamond stylus 21 is brought into contact with the working grinding wheel 16, the contact position being measured by the intervention of a sensor 22 which causes the recording of the position of the detector .
  • Successive passes of dressing are made by moving the grinding wheel after having determined and adjusted 7.
  • the achievement of the desired result that is the reduction of the radius of the grinding wheel 7 to the desired value, is indicated by the fact that the contact circumference between the grinding wheel 7 to be straightened and the grinding wheel 16 coincides in radius with a predetermined set point 33.
  • the measurements of the positions of the grinding wheel axes and the position of the position detector being electronically input into a control device at the precise moment when the sensor 22 detects the contact between the stylus 21 and the grinding wheel, the process flow can be managed and controlled in a very wide and very flexible manner.
  • the sensor 22 may be an acoustic emission sensor which detects the sound emitted during the contact between the stylus 21 and the grinding wheel, but also a piezoelectric sensor (force sensor or load cell or accelerometer) or an inductive sensor or capacitive, or an eddy current sensor, or any other suitable device.
  • a five-axis machine base 1 on which are mounted two superimposed trays 2 and 3 respectively carrying a working wheel support 4 and a wheel stand 5 to be erected.
  • the plate 2 may or may not be integral with the base 1 while the plate 3 is rotatable on the plate 2 (direction B) in one direction or the other around an axis 6 which is fixed relative to the base 1 and perpendicular to it and to the plates 2 and 3.
  • the support 5 guides a rotary shaft on the end of which is mounted the grinding wheel to grind or grind 7, driven by a motor 8.
  • This is a diamond grinding wheel of the type used, for example, for grinding tools such as drills or reamers made of hard material, tool steel or tungsten carbide.
  • the material of so-called diamond wheels is generally formed of diamond grains sintered with a suitable binder or CBN.
  • the support 5 is mounted on the plate 3 by means of a set of two crossed slides 9 and 10 controlled by motors.
  • the motor of the slide 9 is housed inside thereof while that of the slide 10 is shown at 11. It moves the support 5 in the direction Z while the slide 9 is moved on the plate 3 in the direction X.
  • the motor driving the plate 3 in rotation about the axis B is not shown.
  • the plate 2 is fixed relative to the base 1. Like the plate 3 it carries a system of crossed slides 12 and 13 whose slide 12 is driven by a motor 14 to move in the direction U relative to the plate 2 and the slide 13, driven by the motor 15 moves in direction W.
  • the support 4 is mounted on the slide 13. It guides a working wheel shaft (not shown) which carries at its left end to the Fig. 1 a working wheel 16 which is rotated by a motor 17.
  • the working grinding wheel 16 extends cantilevered above the turntable 3. It is a cylindrical piece made of a material more than that of the grinding wheel 7, for which silicon carbide SiC or aluminum oxide Al.sub.2 O.sub.2 is generally used.
  • this grinding wheel consists in making rectifying passes on the edge of the grinding wheel 7 by moving the support 4 by means of the slide 13 in the direction W, it is conceivable that the shape of this grinding wheel remains cylindrical, that is to say with a slice whose generatrices remain parallel to the axis of the shaft housed in the support 4.
  • An important element of the method described here consists in the fact that the operator performing the dressing of the grinding wheel 7, or possibly the cnc (software) command can know at any time the exact diameter of the grinding wheel 16.
  • the material of this grinding wheel being softer than that of the grinding wheel, it undergoes wear that is all the more noticeable when the two wheels turn in contact with each other at a point in their circumference. To take account of this wear, it is necessary to know the rays of the grinding wheels. Now, it is sufficient to know the radius of the grinding wheel so that that of the grinding wheel is given.
  • a carriage 18 driven in the direction E parallel to U, by a motor 19 whose frame is integral with the slide 13.
  • This carriage 18 carries a device 20 more visible to the Fig. 2 . It is a high precision position detector with a diamond stylus 21, periodically measuring the position of the carriage 18 in the direction E and a sensor 22 of the type described above and arranged to record the exact position of the stylus 21 at the precise moment when this element comes into contact with the edge of the grinding wheel 16 while moving in the direction E .
  • the Fig. 2 shows a schematic example of the constituents of the device 20.
  • This device comprises a housing 24 which can be seen at Fig. 2 two rigid plates front and rear, and side guards, these parts being fixed relative to the plate 13. Inside the housing 24 is fixed a guide rail 26 on which slides the carriage 18 driven by a roller guide 27.
  • the motor 19 is fixed. It is housed in the housing 24 and controls a ball screw 28 supported by a bearing 29 secured by its external path with the support 30 of the motor 19.
  • the screw 28 passes through a nut 31 secured to a spacer support 32 which is connected thereto. even to the frame of the mobile carriage 18.
  • This frame carries a support 25 projecting laterally on the side of the housing 24 through an opening of its side protection.
  • the support 25 is equipped with the diamond 21 and the sensor 22.
  • a linear ruler also integral with the carriage 18 makes it possible to measure the instantaneous position of the diamond 21. Said instantaneous position of diamond 21 can also be measured using the encoder of the motor 19 taking into account the pitch of the ball screw 28.
  • the point 33 located at the periphery of the grinding wheel in the horizontal plane containing the axis of the grinding wheel will hereinafter be called the set point.
  • the slides 9 and 10, as the case may be, are thus displaced by also causing the plate 3 to pivot about the axis 6, so that the plane of the grinding wheel train 7 has the desired orientation.
  • the exact position of the grinding wheel will be determined according to the work to be done: perfecting or creating its profile, or reducing its radius only at the tip of the profile or other correction.
  • the successive points of the profile will be processed one after the other, possibly modifying the angle between the plane of the grinding wheel and the main horizontal axis given by U and E, and especially by placing the axis of the wheel 7 so that the point to be treated is at a well-judged distance, that is to say beyond the set point.
  • the grinding wheel 16 is moved so that its edge is in contact with the periphery of the grinding wheel 7, the position of its axis being recorded in the control electronics.
  • This working grinding wheel 16 having a slice parallel to its axis, the grinding wheel 7 can be oriented with its axis parallel to that of the grinding wheel 16, or arranged obliquely, this being obtained by rotation of the plate 3 according to the work to be performed.
  • the exact diameter of the grinding wheel is then measured a first time. For this, the detector 20 is moved in the direction E towards the grinding wheel until, the grinding wheel 16 being rotated by the motor 17, the contact of the diamond 21 with this grinding wheel is detected by the sensor 22.
  • the electronic control device stops the movement of the detector 20 and displays the exact value of the radius of the wheel, the position of its axis being recorded beforehand, which gives the radius of the grinding wheel at this stage of operations.
  • a first pass or a series of dressing or grinding passes is made on the grinding wheel 7. either move the wheel support parallel to itself, or change the orientation of the grinding wheel by moving the plate 3 pivoting on the axis 6, or perform a new series of passes, having previously taken care to measure again the radius of the working wheel by means of the detector 20 and brought it closer to the grinding wheel 7 by choosing a suitable depth for this new pass.
  • the diamond 21 of the position sensor can be moved away so that it is not likely to suffer significant wear.
  • Knowing the diameter of the grinding wheel at all times has several advantages. In particular, it allows to control the holding of this wheel. If it does not cut well, we are led to reduce the depth of the passes. Another advantage is that it makes it possible to know when the dimension of the wheel to trainer approaches the desired value to be achieved. By taking care to reduce the depth of the passes, we obtain a better surface. Finally, the method and the device described allow to give a grinding wheel all the desired profile, regardless of this profile, provided that it is convex.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
EP07116112A 2007-09-11 2007-09-11 Verfahren und Vorrichtung zum Abrichten oder Richten einer Diamantschleifscheibe Withdrawn EP2036671A1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP07116112A EP2036671A1 (de) 2007-09-11 2007-09-11 Verfahren und Vorrichtung zum Abrichten oder Richten einer Diamantschleifscheibe
PCT/IB2008/053636 WO2009034523A1 (fr) 2007-09-11 2008-09-09 Procede et dispositif pour dresser ou rectifier une meule diamantee
TW97134726A TW200927381A (en) 2007-09-11 2008-09-10 Method and device for dressing or rectifying a diamond wheel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07116112A EP2036671A1 (de) 2007-09-11 2007-09-11 Verfahren und Vorrichtung zum Abrichten oder Richten einer Diamantschleifscheibe

Publications (1)

Publication Number Publication Date
EP2036671A1 true EP2036671A1 (de) 2009-03-18

Family

ID=38750357

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07116112A Withdrawn EP2036671A1 (de) 2007-09-11 2007-09-11 Verfahren und Vorrichtung zum Abrichten oder Richten einer Diamantschleifscheibe

Country Status (3)

Country Link
EP (1) EP2036671A1 (de)
TW (1) TW200927381A (de)
WO (1) WO2009034523A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6541546B2 (ja) * 2015-10-21 2019-07-10 株式会社ディスコ 切削装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2484890A1 (fr) * 1980-06-18 1981-12-24 Toyoda Machine Works Ltd Machine a meuler equipee d'un dispositif de detection de l'arrivee d'une meule a sa limite d'usure
DE10249358A1 (de) * 2002-10-23 2004-05-13 Cleveland Präzisions-Systeme GmbH Verfahren und Vorrichtung zum Abrichten eines rotierenden Werkzeugs, z. B. einer Schleifscheibe

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2484890A1 (fr) * 1980-06-18 1981-12-24 Toyoda Machine Works Ltd Machine a meuler equipee d'un dispositif de detection de l'arrivee d'une meule a sa limite d'usure
DE10249358A1 (de) * 2002-10-23 2004-05-13 Cleveland Präzisions-Systeme GmbH Verfahren und Vorrichtung zum Abrichten eines rotierenden Werkzeugs, z. B. einer Schleifscheibe

Also Published As

Publication number Publication date
TW200927381A (en) 2009-07-01
WO2009034523A1 (fr) 2009-03-19

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