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EP0389870A2 - Cutting or grinding wheel for an automatic casting cleaning machine - Google Patents

Cutting or grinding wheel for an automatic casting cleaning machine Download PDF

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Publication number
EP0389870A2
EP0389870A2 EP90104857A EP90104857A EP0389870A2 EP 0389870 A2 EP0389870 A2 EP 0389870A2 EP 90104857 A EP90104857 A EP 90104857A EP 90104857 A EP90104857 A EP 90104857A EP 0389870 A2 EP0389870 A2 EP 0389870A2
Authority
EP
European Patent Office
Prior art keywords
grinding
grinding wheel
cutting disc
cutting
cleaning machine
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
EP90104857A
Other languages
German (de)
French (fr)
Other versions
EP0389870B1 (en
EP0389870A3 (en
Inventor
Werner Lüber
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.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0389870A2 publication Critical patent/EP0389870A2/en
Publication of EP0389870A3 publication Critical patent/EP0389870A3/en
Application granted granted Critical
Publication of EP0389870B1 publication Critical patent/EP0389870B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • B24D3/34—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties
    • 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
    • B24B49/10—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 involving electrical means

Definitions

  • the present invention relates to a grinding or cutting disc for an automatic cast cleaning machine.
  • a method for controlling an automatic cast cleaning machine in which a grinding or cutting disc is placed on a clamped cast workpiece and then at least the working feed of the grinding or cutting disc is program-controlled using workpiece-dependent control data, the approximate distance between Grinding or cutting disc and cast workpiece serves as a comparative measure for triggering an electrical control signal to initiate program control by building a controllable high-voltage potential between the grinding or cutting disc and the cast workpiece the level of the voltage and the size of the air gap forming a flashover gap between the grinding or cutting disc and the cast workpiece are a measure of the ignition voltage causing the electrical control signal.
  • a control signal can be generated, which takes effect before a contact between the grinding or cutting disc and the cast workpiece and thus initiates a precise program-controlled machining of the cast workpiece, regardless of fibrations. It is also irrelevant which material the workpiece is made of.
  • this method requires a special grinding or cutting disc, which is the subject of the present invention and which, according to the invention, is distinguished by an electrically conductive design over its entire extent.
  • Such a grinding or cutting disc can thus, in addition to its processing function, form one of the two electrodes of a high-voltage ignition path, the other electrode of which is the cast workpiece to be machined, between which two electrodes an arc ignition then takes place with sufficient high voltage and sufficient proximity, which leads to the aforementioned control signal .
  • the grinding or cutting disc can be advantageous be designed such that the abrasive body is coated or interspersed with a copper mesh or braid or a copper foil, or electrically conductive structures such as graphite are incorporated in the abrasive body.
  • the grinding wheel can then be connected to a pole of a high-voltage generator via its hub.
  • the grinding or cutting disc shown here as a circumferential grinding wheel 1 comprises in the usual way a grinding body 2 which is seated on a metal hub 3 on an axis or shaft 4 which is supported in bearings 5.
  • This grinding wheel 1 is intended to cooperate with the cast workpiece 7 in order to ignite a signal-generating arc in the proximity gap 8 if the wheel and the workpiece are sufficiently approached.
  • the grinding wheel 1 forms an electrode which can be connected to a high-voltage generator 9 and whose counter-electrode forms the cast workpiece 7.
  • the grinding or cutting disc is electrically conductive over its entire formation.
  • electrically conductive structures such as graphite
  • the grinding body 2 is coated or interspersed with a fabric or braid 6, preferably made of copper, or with copper foil or the like.
  • the grinding wheel 2 is then resp. Via its hub 3.
  • its shaft or axis 4 is electrically connected to the high-voltage generator 9 via suitable sliding contacts or the like.
  • Such a grinding or cutting wheel according to the invention can moreover be constructed in a conventional manner.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

The peripheral grinding wheel (1) comprises an abrasive body (2) which sits on a spindle or shaft (4) via a metal hub (3). Here, this grinding wheel (1) forms an electrode which can be connected to a high-voltage generator (9) and whose opposite electrode is a casting (7). An arc producing a control signal is struck between the grinding wheel (1) and the casting (7) when they approach one another. For this purpose, the grinding wheel (1) is designed so as to be electrically conductive over its entire extent. <IMAGE>

Description

Die vorliegende Erfindung betrifft eine Schleif- oder Trenn­scheibe für eine automatische Gussputzschleifmaschine.The present invention relates to a grinding or cutting disc for an automatic cast cleaning machine.

In einer gleichzeitig hinterlegten Patentanmeldung des glei­chen Anmelders wird ein Verfahren zum Steuern einer automati­schen Gussputzschleifmaschine beschrieben, bei welcher eine Schleif- oder Trennscheibe an ein eingespanntes Gusswerk­stück angestellt und dann mindestens der Arbeitsvorschub der Schleif- oder Trennscheibe mittels werkstückabhängigen Steuer­daten programmgesteuert wird, wobei der Näherungsabstand zwischen Schleif- oder Trennscheibe und Gusswerkstück als Vergleichsmass für die Auslösung eines elektrischen Steuer­signals zur Einleitung der Programmsteuerung dient, indem zwischen der Schleif- oder Trennscheibe und dem Gusswerkstück ein regelbares Hochspannungspotential aufgebaut wird, wobei die Höhe der Spannung und die Grösse des, einen Ueberschlags­spalt bildenden Luftspaltes zwischen Schleif- oder Trennscheibe und Gusswerkstück ein Mass für die das elektrische Steuer­signal bewirkende Zündspannung sind.In a simultaneously filed patent application by the same applicant, a method for controlling an automatic cast cleaning machine is described, in which a grinding or cutting disc is placed on a clamped cast workpiece and then at least the working feed of the grinding or cutting disc is program-controlled using workpiece-dependent control data, the approximate distance between Grinding or cutting disc and cast workpiece serves as a comparative measure for triggering an electrical control signal to initiate program control by building a controllable high-voltage potential between the grinding or cutting disc and the cast workpiece the level of the voltage and the size of the air gap forming a flashover gap between the grinding or cutting disc and the cast workpiece are a measure of the ignition voltage causing the electrical control signal.

Durch diese Massnahmen kann ein Steuersignal erzeugt werden, welches vor einer Berührung zwischen Schleif- oder Trenn­scheibe und Gusswerkstück wirksam wird und so unabhängig und unbeeinflusst von Fibrationen eine präzise programmgesteuerte Bearbeitung des Gusswerkstückes einleitet. Hierbei ist es zu­dem gleichgültig, aus welchem Material das Werkstück besteht.Through these measures, a control signal can be generated, which takes effect before a contact between the grinding or cutting disc and the cast workpiece and thus initiates a precise program-controlled machining of the cast workpiece, regardless of fibrations. It is also irrelevant which material the workpiece is made of.

Dieses Verfahren setzt aber eine spezielle Schleif- oder Trennscheibe voraus, welche Gegenstand der vorliegenden Er­findung ist und welche sich erfindungsgemäss auszeichnet durch eine elektrisch leitende Ausbildung über deren ganze Ausdehnung.However, this method requires a special grinding or cutting disc, which is the subject of the present invention and which, according to the invention, is distinguished by an electrically conductive design over its entire extent.

Eine solche Schleif- oder Trennscheibe kann somit neben ihrer Bearbeitungsfunktion eine der beiden Elektroden einer Hoch­spannungs-Zündstrecke bilden, deren andere Elektrode das zu bearbeitende Gusswerkstück ist, zwischen welchen beiden Elek­toden dann bei genügender Hochspannung und ausreichender Nähe­rung eine Lichtbogenzündung stattfindet, welche zum vorer­wähnten Steuersignal führt.Such a grinding or cutting disc can thus, in addition to its processing function, form one of the two electrodes of a high-voltage ignition path, the other electrode of which is the cast workpiece to be machined, between which two electrodes an arc ignition then takes place with sufficient high voltage and sufficient proximity, which leads to the aforementioned control signal .

Hierbei kann die Schleif- oder Trennscheibe vorteilhaft so ausgebildet sein, dass der Schleifkörper mit einem Kupferge­webe oder -geflecht oder einer Kupferfolie beschichtet oder durchsetzt wird oder im Schleifkörper elektrisch leitende Strukturen, wie Graphit, eingebunden sind.Here, the grinding or cutting disc can be advantageous be designed such that the abrasive body is coated or interspersed with a copper mesh or braid or a copper foil, or electrically conductive structures such as graphite are incorporated in the abrasive body.

Der Schleifkörper kann dann über seine Nabe mit einem Pol eines Hochspannungsgenerators verbunden werden.The grinding wheel can then be connected to a pole of a high-voltage generator via its hub.

Eine beispielsweise Ausführungsform des Erfindungsgegenstandes ist nachfolgend anhand der Zeichnung, welche in schematischer Darstellung eine Schleif- oder Trennscheibe für eine auto­matische Gussputzschleifmaschine zeigt, näher erläutert.An example embodiment of the subject matter of the invention is explained in more detail below with reference to the drawing, which shows a grinding or cutting disc for an automatic cast-iron grinding machine in a schematic representation.

Die hier als Umfangsschleifscheibe 1 dargestellte Schleif- oder Trennscheibe umfasst in üblicher Weise einen Schleif­körper 2, der über eine Metallnabe 3 auf einer Achse oder Welle 4 aufsitzt, die in Lager 5 abgestützt ist.The grinding or cutting disc shown here as a circumferential grinding wheel 1 comprises in the usual way a grinding body 2 which is seated on a metal hub 3 on an axis or shaft 4 which is supported in bearings 5.

Diese Schleifscheibe 1 soll hier mit dem Gusswerkstück 7 zu­sammenwirken, um bei genügender Näherung von Scheibe und Werk­stück im Näherungsspalt 8 einen signalerzeugenden Lichtbogen zu zünden.This grinding wheel 1 is intended to cooperate with the cast workpiece 7 in order to ignite a signal-generating arc in the proximity gap 8 if the wheel and the workpiece are sufficiently approached.

Hierfür bildet die Schleifscheibe 1 eine an einen Hochspan­nungsgenerator 9 anschliessbare Elektrode, deren Gegenelek­trode das Gusswerkstück 7 bildet.For this purpose, the grinding wheel 1 forms an electrode which can be connected to a high-voltage generator 9 and whose counter-electrode forms the cast workpiece 7.

Um als Elektrode wirksam zu sein, ist die Schleif- oder Trennscheibe über ihre ganze Ausbildung elektrisch leitend.In order to be effective as an electrode, the grinding or cutting disc is electrically conductive over its entire formation.

Hierfür können im Schleifkörper 2 elektrisch leitende Struk­turen, wie Graphit, eingebunden sein, oder der Schleifkörper ist, wie dargestellt, mit einem Gewebe oder Geflecht 6 vor­zugsweise aus Kupfer, oder mit Kupferfolie o. dgl. beschich­tet oder damit durchsetzt.For this purpose, electrically conductive structures, such as graphite, can be incorporated in the grinding body 2, or, as shown, the grinding body is coated or interspersed with a fabric or braid 6, preferably made of copper, or with copper foil or the like.

Der Schleifkörper 2 ist dann über seine Nabe 3 resp. seine Welle oder Achse 4 über geeignete Schleifkontakte o. dgl. mit dem Hochspannungsgenerator 9 elektrisch verbunden.The grinding wheel 2 is then resp. Via its hub 3. its shaft or axis 4 is electrically connected to the high-voltage generator 9 via suitable sliding contacts or the like.

Eine solche erfindungsgemässe Schleif- oder Trennscheibe kann im übrigen in konventioneller Weise aufgebaut sein.Such a grinding or cutting wheel according to the invention can moreover be constructed in a conventional manner.

Claims (4)

1. Schleif- oder Trennscheibe für eine automatische Guss­putzschleifmaschine, gekennzeichnet durch eine elektrisch leitende Ausbildung über deren ganze Ausdehnung.1. Grinding or cutting disc for an automatic cast cleaning machine, characterized by an electrically conductive design over its entire extent. 2. Schleif- oder Trennscheibe nach Anspruch 1, dadurch ge­kennzeichnet, dass der Schleifkörper (2) mit einem Gewebe oder Geflecht oder einer Folie aus Kupfer o. dgl. beschich­tet oder durchsetzt ist.2. Grinding or cutting disc according to claim 1, characterized in that the grinding body (2) is coated or interspersed with a fabric or braid or a foil made of copper or the like. 3. Schleif- oder Trennscheibe nach Anspruch 1, dadurch ge­kennzeichnet, dass im Schleifkörper (2) elektrisch leitende Strukturen, wie Graphit, eingebunden sind.3. Grinding or cutting disc according to claim 1, characterized in that in the grinding body (2) electrically conductive structures, such as graphite, are integrated. 4. Schleif- oder Trennscheibe nach einem der vorangehenden Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Schleif­körper (2) über seine Nabe (3) mit einem Pol eines Hoch­spannungsgenerators (9) verbindbar ist.4. Grinding or cutting disc according to one of the preceding claims 1 to 3, characterized in that the grinding body (2) via its hub (3) with a pole of a high voltage generator (9) can be connected.
EP90104857A 1989-03-29 1990-03-15 Cutting or grinding wheel for an automatic casting cleaning machine Expired - Lifetime EP0389870B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1130/89 1989-03-29
CH1130/89A CH678827A5 (en) 1989-03-29 1989-03-29

Publications (3)

Publication Number Publication Date
EP0389870A2 true EP0389870A2 (en) 1990-10-03
EP0389870A3 EP0389870A3 (en) 1991-02-06
EP0389870B1 EP0389870B1 (en) 1994-07-27

Family

ID=4203197

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90104857A Expired - Lifetime EP0389870B1 (en) 1989-03-29 1990-03-15 Cutting or grinding wheel for an automatic casting cleaning machine

Country Status (6)

Country Link
US (1) US5159785A (en)
EP (1) EP0389870B1 (en)
AT (1) ATE109057T1 (en)
CH (1) CH678827A5 (en)
DE (1) DE59006547D1 (en)
ES (1) ES2057227T3 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113894363A (en) * 2021-09-03 2022-01-07 燕山大学 Polishing device for automatic paint removal of pipeline and polishing method thereof
CN116512079A (en) * 2023-06-29 2023-08-01 山东福尔特种设备有限公司 Pressure vessel rust cleaning device that polishes

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2750632B1 (en) * 1996-07-08 1998-10-30 Efsa METHOD AND DEVICE FOR GRINDING A THICKNESS OF A METAL PART
JP3362148B2 (en) * 1998-05-22 2003-01-07 株式会社ジャパン・コスモ Core drill for micro-hole processing and method of manufacturing the same

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3194751A (en) * 1961-09-01 1965-07-13 Ex Cell O Corp Electrolytic grinder wheel
US3686800A (en) * 1969-12-22 1972-08-29 Itt Abrasive cutting-off wheels having metal coated sides
FR2243783A1 (en) * 1973-09-17 1975-04-11 Chijiiwa Kenji
GB2098892A (en) * 1981-05-21 1982-12-01 Nicco Machine Tool Co Ltd Grinding wheel
FR2526353A1 (en) * 1982-05-10 1983-11-10 Tokyo Shibaura Electric Co MACHINING WHEEL AND METHOD FOR MANUFACTURING THE SAME
JPS61131873A (en) * 1984-11-28 1986-06-19 Tokai Carbon Co Ltd conductive abrasive
JPS61178181A (en) * 1985-02-01 1986-08-09 Inoue Japax Res Inc Manufacture of conductive grind stone

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2256120A (en) * 1940-05-20 1941-09-16 Gear Grinding Mach Co Electric indicator for grinding machines
US3062633A (en) * 1958-12-30 1962-11-06 Norton Co Electrically conductive organic bonded grinding wheel
US3147574A (en) * 1962-06-29 1964-09-08 Hupp Corp Dimensional control device
JPS5216837B2 (en) * 1973-07-17 1977-05-11
DE2422940B2 (en) * 1974-05-11 1976-06-10 Werkzeugmaschinenfabrik Adolf Waldrich Coburg, 8630 Coburg DEVICE FOR CONTROLLING THE INFEED MOVEMENT OF A ROTATING TOOL CARRIED BY A TOOL SPINDLE, IN PARTICULAR A GRINDING WHEEL
JPS5929391B2 (en) * 1979-09-18 1984-07-20 株式会社井上ジャパックス研究所 grinding wheel
DE3717568A1 (en) * 1987-05-25 1988-12-08 Lach Spezial Werkzeuge Gmbh METHOD AND DEVICE FOR MECHANICAL GRINDING OF WORKPIECES BY MEANS OF ELECTRICALLY CONDUCTIVE GRINDING TOOLS

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3194751A (en) * 1961-09-01 1965-07-13 Ex Cell O Corp Electrolytic grinder wheel
US3686800A (en) * 1969-12-22 1972-08-29 Itt Abrasive cutting-off wheels having metal coated sides
FR2243783A1 (en) * 1973-09-17 1975-04-11 Chijiiwa Kenji
GB2098892A (en) * 1981-05-21 1982-12-01 Nicco Machine Tool Co Ltd Grinding wheel
FR2526353A1 (en) * 1982-05-10 1983-11-10 Tokyo Shibaura Electric Co MACHINING WHEEL AND METHOD FOR MANUFACTURING THE SAME
JPS61131873A (en) * 1984-11-28 1986-06-19 Tokai Carbon Co Ltd conductive abrasive
JPS61178181A (en) * 1985-02-01 1986-08-09 Inoue Japax Res Inc Manufacture of conductive grind stone

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 10, no. 326 (M-532)(2382) 06 November 1986, & JP-A-61 131873 (TOKAI CARBON CO LTD) 19 Juni 1986, *
PATENT ABSTRACTS OF JAPAN vol. 10, no. 388 (M-549)(2445) 25 Dezember 1986, & JP-A-61 178181 (INOUE JAPAX RES INC.) 09 August 1986, *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113894363A (en) * 2021-09-03 2022-01-07 燕山大学 Polishing device for automatic paint removal of pipeline and polishing method thereof
CN113894363B (en) * 2021-09-03 2022-11-04 燕山大学 Polishing device for automatically removing paint of pipeline and polishing method thereof
CN116512079A (en) * 2023-06-29 2023-08-01 山东福尔特种设备有限公司 Pressure vessel rust cleaning device that polishes
CN116512079B (en) * 2023-06-29 2023-09-12 山东福尔特种设备有限公司 Pressure vessel rust cleaning device that polishes

Also Published As

Publication number Publication date
ES2057227T3 (en) 1994-10-16
EP0389870B1 (en) 1994-07-27
ATE109057T1 (en) 1994-08-15
US5159785A (en) 1992-11-03
EP0389870A3 (en) 1991-02-06
DE59006547D1 (en) 1994-09-01
CH678827A5 (en) 1991-11-15

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