EP0045380B1 - Steuerschaltung für eine Vorrichtung zum Nachstellen und Abrichten einer Schleifscheibe - Google Patents

Steuerschaltung für eine Vorrichtung zum Nachstellen und Abrichten einer Schleifscheibe Download PDF

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Publication number
EP0045380B1
EP0045380B1 EP81105183A EP81105183A EP0045380B1 EP 0045380 B1 EP0045380 B1 EP 0045380B1 EP 81105183 A EP81105183 A EP 81105183A EP 81105183 A EP81105183 A EP 81105183A EP 0045380 B1 EP0045380 B1 EP 0045380B1
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EP
European Patent Office
Prior art keywords
grinding wheel
counter
grinding
dressing
comparator
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
EP81105183A
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German (de)
English (en)
French (fr)
Other versions
EP0045380A3 (en
EP0045380A2 (de
Inventor
Ulrich Dipl.-El.-Ing./Eth Wuest
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.)
Maag Zahnrader und Maschinen AG
Original Assignee
Maag Zahnrader und Maschinen AG
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 Maag Zahnrader und Maschinen AG filed Critical Maag Zahnrader und Maschinen AG
Publication of EP0045380A2 publication Critical patent/EP0045380A2/de
Publication of EP0045380A3 publication Critical patent/EP0045380A3/de
Application granted granted Critical
Publication of EP0045380B1 publication Critical patent/EP0045380B1/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

Definitions

  • the invention relates to a control circuit of the type specified in the preamble of claim 1 for a device for adjusting and dressing a grinding wheel.
  • a control circuit which has a push button contact attached to a push button. The button is placed intermittently on the ring surface, and as soon as the contact is closed due to a certain wear of the ring surface, the control circuit issues a command to readjust the grinding wheel.
  • the adjustment takes place around one tooth of a ratchet wheel, by means of which the grinding spindle is adjusted. If a preselected number of readjustments is not reached within the preselectable dressing interval, this is regarded as an indication that the surface of the grinding wheel is smeared (clogging of its pores by grinding dust, oil, etc.) and that work is not done properly within the dressing interval Has. In this case, the control circuit therefore delivers a further command, by means of which the dressing tool is moved by one tooth of another ratchet wheel and the dressing tool is then pivoted over the ring surface of the grinding wheel for dressing.
  • the scanning is only intended for readjusting the grinding wheel, because the dressing process always remains the same and is always carried out only if the preselected number of grinding wheel readjustments is not reached within a dressing interval. It is therefore to be seen as in need of improvement that the scanning process does not provide any information about the quality of the grinding wheel, i.e. says nothing about the appearance of their grinding surface, and that the same amount of material is always removed from the grinding wheel during the dressing process, without knowing whether such material removal is necessary at all. Since the touch contact only provides YES / No information (i.e. readjust or not readjust), it cannot be determined how far the grinding spindle is to be readjusted, which is why in the known device the grinding spindle is simply always advanced by one tooth. It can only be determined in the next sampling interval whether such an extension was sufficient or too large.
  • the grinding wheel must therefore be adjusted in the radial direction so that its outer surface can be dressed by another dressing device.
  • the known device provides no information about when this radial adjustment of the grinding wheel and thus the dressing of its outer surface has to take place.
  • the object of the invention is to design a control circuit of the type specified in the preamble of patent claim 1 for a device for adjusting and dressing a grinding wheel in such a way that it indicates the actual state of wear of the grinding wheel and its surface condition and a readjusting and / or dressing process only then, if it is actually required and only to the extent necessary.
  • control circuit equipped with a touch contact is only able to indicate whether the grinding wheel is worn or not worn and thus can be adjusted or not adjusted
  • the control circuit according to the invention delivers considerably more due to the displacement sensor used instead of the touch contact by the scanning process Information by means of which a statement can be made about the quality of the surface of the grinding wheel.
  • the counter reading of the first counter corresponds to the number of pulses during a key interval.
  • this counter reading can be used as a statement about the surface quality of the wheel, for example due to grinding dust, oil etc., the pores of the disc are clogged and fewer impulses are delivered. So it is possible to dress the grinding wheel only when dressing is really necessary, and also to adjust the stroke of the dressing tool accordingly.
  • control circuit supplies a signal which corresponds to the number of axial readjustments and states precisely when the grinding wheel is to be radially adjusted and dressed, i.e. when their outer surface has to be turned off.
  • control circuit provides a signal that indicates when a grinding wheel has been turned so far that it can no longer be used.
  • Fig. 1 shows schematically a control circuit for a device, not shown, for adjusting and dressing a grinding wheel 1.
  • the grinding wheel 1 is only partially shown in Fig. 1 and rotatable about a vertical axis.
  • a button 2 corresponds to the button designated in FIG. 1 of DE-OS 27 26 843 with the reference number 15.
  • the button 2 is pivotally mounted at point 3. At its right end, it wears a tactile diamond 4, which is brought into contact with an annular surface 1 of the grinding wheel 1 when the stylus 2 is pivoted.
  • An actuating device 5 acts on the lever arm 2b of the pushbutton 2 to the left of the pivot bearing 3, which periodically presses the pushbutton diamond 4 against the grinding wheel, so that an active connection 6 at the other end to an element provided inside a displacement sensor 7 in the following acts in a detailed manner.
  • the button 2 is periodically pivoted by the actuating device 5 in such a way that the touch diamond touches the grinding wheel for a short time t T and is then lifted off again, as shown in FIG. 2, in which the interval “buttons” (t T ) For example, 0.3 s and the “off-hook” interval is 0.7 s. This avoids unnecessary wear of the grinding wheel by the tactile diamond.
  • the short swivel path of the lever arm 2a is converted into a substantially longer swivel path of the lever arm 2b and into a corresponding translation movement on the operative connection 6.
  • a displacement sensor is used in the control circuit described here, which can be an inductive, a capacitive or an optical displacement sensor.
  • Such a position sensor is able to supply a continuous signal dependent on the path of the touch diamond instead of the YES / NO information of the known touch contact.
  • the embodiment of the control circuit described here is explained using the example of the use of an inductive displacement sensor. This can have the structure shown schematically in FIG. 3, for example.
  • a reciprocating iron core 71 is arranged, the position of which influences the magnetic field of the coils and thus the output signal of the displacement sensor, which is picked up at the connection point of the two coils and the other end point of one or the other coil , while the supply voltage of the displacement sensor is applied to the terminals labeled «+» and «-».
  • the position of the iron core 71 is dependent on the position of the tactile diamond 4 due to the operative connection 6, which is a mechanical connection in the exemplary embodiment described here. Unevenness of the grinding wheel 1 in the order of magnitude of 1 1 1 m already causes the touch diamond 4 and thus the displacement sensor 7 to respond.
  • the displacement sensor 7 emits an output signal which has one of the signal forms shown in FIGS. 4a-4d.
  • 4a shows a voltage signal, the shape of which corresponds to the oscillations of the tactile diamond, which the diamond executes when it follows the grinding wheel surface and is deflected in each case by abrasive grains or generally by unevenness.
  • This signal corresponds to a small wear on the grinding wheel and a rough, ie open-pore grinding wheel surface.
  • the signal shown in Fig. 4b corresponds to a small wear of the grinding wheel and a smooth surface, the pores of which are clogged, for example by grinding dust and oil.
  • the peaks of this signal are each wider in time, since the tactile diamond is deflected less frequently by an abrasive grain protruding from the surface of the grinding wheel.
  • the signal shown in Fig. 4c corresponds to a large wear of the grinding wheel and a rough surface. Due to the greater wear of the grinding wheel compared to the case in FIG. 4a, the tactile diamond had to travel a greater distance, the iron core 71 in the displacement sensor 7 being correspondingly displaced further upward. The probe diamond 4 or the iron core 71 then carries out the same oscillations around this upper layer as in the case of FIG. 4a. As a result, the signal in FIG. 4c has a larger effective value than the signal in FIG. 4a.
  • the signal shown in Fig. 4d corresponds to a large wear of the grinding wheel and a smooth grinding wheel surface. For the reasons set out above, the Si 4d has a larger effective value than the signal in FIG. 4b.
  • the path transmitter 4 is followed by three circuit branches, designated I, II and 111, of the control circuit, which are described in detail below.
  • the output of the displacement sensor 7 is connected to a comparator 8, the output of which is connected to the input of a counter 9.
  • the output of the counter 9 is connected to the input of a comparator 10, the second input of which is connected to a constant encoder 11.
  • the output of the comparator 10 is connected to a terminal A I.
  • the set input S and the reset input R of the counter 9 are connected to the actuating device 5.
  • Circuit branch I enables the control circuit not only to trigger a dressing process, but also to determine the stroke of the dressing tool. This represents a much more precise dressing process than in the known device, since it is dressed at regular time intervals and always with the same stroke. The latter is particularly disadvantageous in the case of panes which are only used for layering, ie which have a significantly longer service life due to significantly less wear.
  • the control circuit according to the invention is much more advantageous since it only initiates a dressing process when a smooth (ie smeared) grinding wheel surface has actually been found.
  • the signal emitted at terminal A I is fed to a dressing device (not shown in FIG. 1) which can be continuously adjusted in accordance with the size of this signal. After this adjustment has been made, the dressing diamond carries out the dressing process as in the known device.
  • circuit branch I only the number of vertices of the output signal of displacement sensor 7 is of interest, since this number, based on the comparison with the grinding wheel constant, enables a statement about the surface condition of the grinding wheel.
  • the amplitude of the apex is additionally evaluated in circuit branch II, since these have an apex value V 2 which is greater than V 1 when the grinding wheel is very worn.
  • the circuit branch 11 contains an integrator 12, the output of which is connected to the output of the displacement sensor 7 and the output of which is connected to an output terminal A.
  • the integrator 12 integrates the output signal of the displacement sensor over the pulse time t T and delivers a wear signal at the terminal A ll as the integration result.
  • the rms voltage value of this signal is an immediate indication of how much the grinding wheel is worn and how far the grinding spindle has to be readjusted.
  • the wear signal emitted at output A ll is fed with a stepless adjustment drive for the grinding spindle.
  • the circuit branch II makes it possible to determine this adjustment, which is too wide, because the iron core 71 of the inductive displacement sensor 7 is pulled further out of the magnetic field and then the rms voltage value formed by the integrator is significantly smaller than in the case of a rough surface with the correct grinding wheel position. In this case, the grinding wheel can be automatically reset to the correct position.
  • the circuit branch 111 contains an A / D converter 13, the input of which is connected to the output of the integrator 12 and the output of which is connected to the input of a comparator 14.
  • the A / D converter 13 outputs a number of digital values corresponding to the voltage supplied by the integrator 12, which the comparator 14 compares with a constant which it receives from a constant generator 15 via a further input.
  • the comparator 14 outputs the comparison result as an output signal at a terminal A 11 .
  • a counter 16 is connected to the output of the circuit branch 111, the output of which is connected to an input of a comparator 17.
  • the comparator 17 has a further input which is connected to a constant generator 18.
  • the output of the comparator 17 is connected to a terminal A ' III .
  • the counter 16 counts the output pulses of the comparator 14.
  • the counter reading is compared in the comparator 17 with the constant set in the constant generator 18. This constant indicates how often the dimension Y can be turned off until the disc can no longer be used. If the comparator 17 determines that the counter reading of the counter 16 and the constant supplied by the constant transmitter 18 are the same, the grinding machine is switched off via the signal output at the terminal A ' III , since the grinding wheel has to be replaced. In this case, the counter 16 is also cleared to zero again via a reset input (not shown).
  • FIG. 6 shows an overall view of a gear grinding machine in which the control circuit described here is used.
  • the control circuit is accommodated in an electronics cabinet 61 arranged next to the machine.
  • An operating panel 62 carries the setting devices for the constant transmitters 11, 15 and 18.
  • 63a and 63b denote the feed cylinders for the two grinding wheels of the machine.
  • the drive motor is one of the two feed carriages for the axial grinding spindle adjustment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
EP81105183A 1980-07-31 1981-07-04 Steuerschaltung für eine Vorrichtung zum Nachstellen und Abrichten einer Schleifscheibe Expired EP0045380B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH583580 1980-07-31
CH5835/80 1980-07-31

Publications (3)

Publication Number Publication Date
EP0045380A2 EP0045380A2 (de) 1982-02-10
EP0045380A3 EP0045380A3 (en) 1982-06-02
EP0045380B1 true EP0045380B1 (de) 1984-10-24

Family

ID=4300086

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81105183A Expired EP0045380B1 (de) 1980-07-31 1981-07-04 Steuerschaltung für eine Vorrichtung zum Nachstellen und Abrichten einer Schleifscheibe

Country Status (4)

Country Link
US (1) US4461125A (ja)
EP (1) EP0045380B1 (ja)
JP (1) JPS5754075A (ja)
DE (2) DE3039130C2 (ja)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3315197A1 (de) * 1983-04-27 1984-10-31 Schaudt Maschinenbau Gmbh, 7000 Stuttgart Verfahren zum abrichten von schleifscheiben
US4493168A (en) * 1983-06-16 1985-01-15 Coburn Optical Industries, Inc. Calibration gauge for computer-controlled lens generator, or the like
JPS6033006A (ja) * 1983-08-02 1985-02-20 Toyoda Mach Works Ltd 円筒型砥石車のツル−イング装置
DE3529427A1 (de) * 1985-08-16 1987-02-26 Fortuna Werke Maschf Ag Verfahren und vorrichtung zum einleiten eines abrichtvorganges einer schleifscheibe in abhaengigkeit von deren stumpfungsgrad
US4604834A (en) * 1985-10-03 1986-08-12 General Electric Company Method and apparatus for optimizing grinding
US5025592A (en) * 1988-05-09 1991-06-25 Brother Kogyo Kabushiki Kaisha Machine tool having workpiece machining dimension and tool length measuring functions
CA1276470C (en) * 1988-06-30 1990-11-20 Suren B. Rao Optimization method and apparatus for dressing a grinding wheel
US4924842A (en) * 1988-06-30 1990-05-15 National Broach & Machine Company Optimization method and apparatus for dressing a grinding wheel
DE19626388C1 (de) * 1996-07-01 1997-07-31 Vollmer Werke Maschf Maschine zum Bearbeiten von Zahnflanken eines Sägeblattes
DE10104287B4 (de) * 2001-01-30 2006-08-24 Sirona Dental Systems Gmbh Verfahren zur Bestimmung aktueller Positionsdaten eines Bearbeitungswerkzeuges und Vorrichtung hierzu
US20170066104A9 (en) * 2009-12-08 2017-03-09 Allison Transmission Inc. Method for Detecting And/Or Preventing Grind Burn
JP5573459B2 (ja) * 2010-07-27 2014-08-20 株式会社ジェイテクト 研削方法および研削盤
CN112439951B (zh) * 2020-11-11 2022-03-11 中国航发中传机械有限公司 一种基于几何自适应补偿的齿轮倒圆倒角铣削加工方法
CN113927482B (zh) * 2021-10-18 2023-04-11 广汽乘用车有限公司 一种伺服焊钳电极修磨压力控制方法及控制系统

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH89285A (de) * 1920-08-06 1921-09-16 Fleischmann Nikolaus Vorrichtung zum selbsttätigen Nachstellen einer Schleifscheibe behufs Ausgleichens ihrer Abnützung.
GB481021A (en) * 1936-08-31 1938-02-28 Maag Zahnraeder & Maschinen Ag Device for adjusting the grinding disc of grinding machines, more particularly gear grinding machines
US3033187A (en) * 1961-03-13 1962-05-08 Norton Co Wheel wear sensing device and compensator
US3214965A (en) * 1962-05-31 1965-11-02 Abrasive Dressing Tool Company Inspecting abrasive grinding wheels
DE1302454B (ja) * 1964-07-08
GB1053140A (ja) * 1965-12-20
US3517460A (en) * 1966-04-26 1970-06-30 Donald R Stewart Abrading tool control systems
US3500811A (en) * 1966-08-26 1970-03-17 Gen Motors Corp Automatically controlled dressing apparatus for a grinding wheel
US3691698A (en) * 1970-11-23 1972-09-19 Sundstrand Engelberg Abrasive element dimension sensing mechanism
JPS48101151A (ja) * 1972-04-04 1973-12-20
DD96043A1 (ja) * 1972-04-07 1973-03-12
DE2535912A1 (de) * 1975-08-12 1977-02-17 Salje Ernst Verfahren und vorrichtung zur rauhigkeitspruefung von oberflaechen
DD122662A1 (ja) * 1975-10-28 1976-10-20
SU544542A2 (ru) * 1976-01-19 1977-01-30 Центральный Научно-Исследовательский И Конструкторский Институт Топливной Аппаратуры Автотракторных И Стационарных Двигателей Устройство дл правки шлифовальных кругов
CH617380A5 (ja) * 1977-05-05 1980-05-30 Maag Zahnraeder & Maschinen Ag
US4295301A (en) * 1979-11-08 1981-10-20 Trw Inc. Dressing apparatus with means for detecting grinding wheel wear

Also Published As

Publication number Publication date
EP0045380A3 (en) 1982-06-02
DE3166817D1 (en) 1984-11-29
EP0045380A2 (de) 1982-02-10
JPS5754075A (ja) 1982-03-31
DE3039130C2 (de) 1982-12-09
DE3039130A1 (de) 1982-02-11
US4461125A (en) 1984-07-24

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