EP0389870B1 - Schleif- oder Trennscheibe für eine automatische Gussputzschleifmaschine - Google Patents

Schleif- oder Trennscheibe für eine automatische Gussputzschleifmaschine Download PDF

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Publication number
EP0389870B1
EP0389870B1 EP90104857A EP90104857A EP0389870B1 EP 0389870 B1 EP0389870 B1 EP 0389870B1 EP 90104857 A EP90104857 A EP 90104857A EP 90104857 A EP90104857 A EP 90104857A EP 0389870 B1 EP0389870 B1 EP 0389870B1
Authority
EP
European Patent Office
Prior art keywords
grinding wheel
grinding
cutting
cleaning machine
electrode
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
EP90104857A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0389870A3 (de
EP0389870A2 (de
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
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 Individual filed Critical Individual
Publication of EP0389870A2 publication Critical patent/EP0389870A2/de
Publication of EP0389870A3 publication Critical patent/EP0389870A3/de
Application granted granted Critical
Publication of EP0389870B1 publication Critical patent/EP0389870B1/de
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.
  • Grinding or cutting discs are e.g. known from FR-A-2526 353.
  • 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 by means of 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, independently and unaffected by 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 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 approximation, which leads to the aforementioned control signal .
  • the grinding or cutting disc can be advantageous be designed such that the abrasive body is coated with a copper fabric or braid or a copper foil.
  • 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 that can be connected to a high-voltage generator 9, the counter electrode of which forms the cast workpiece 7.
  • the grinding or cutting disc is electrically conductive over its entire formation.
  • the abrasive body can be coated with a fabric or braid 6 made of copper or with copper foil.
  • the grinding wheel 2 is then via its hub 3, respectively.
  • 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)
EP90104857A 1989-03-29 1990-03-15 Schleif- oder Trennscheibe für eine automatische Gussputzschleifmaschine Expired - Lifetime EP0389870B1 (de)

Applications Claiming Priority (2)

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

Publications (3)

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

Family

ID=4203197

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90104857A Expired - Lifetime EP0389870B1 (de) 1989-03-29 1990-03-15 Schleif- oder Trennscheibe für eine automatische Gussputzschleifmaschine

Country Status (6)

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

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2750632B1 (fr) * 1996-07-08 1998-10-30 Efsa Procede et dispositif de meulage d'une surepaisseur d'une piece metallique
JP3362148B2 (ja) * 1998-05-22 2003-01-07 株式会社ジャパン・コスモ 微細孔加工用コアドリル及びその製造方法
CN113894363B (zh) * 2021-09-03 2022-11-04 燕山大学 用于管道自动除漆的打磨装置及其打磨方法
CN116512079B (zh) * 2023-06-29 2023-09-12 山东福尔特种设备有限公司 一种压力容器打磨除锈装置

Family Cites Families (12)

* 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
US3194751A (en) * 1961-09-01 1965-07-13 Ex Cell O Corp Electrolytic grinder wheel
US3147574A (en) * 1962-06-29 1964-09-08 Hupp Corp Dimensional control device
US3686800A (en) * 1969-12-22 1972-08-29 Itt Abrasive cutting-off wheels having metal coated sides
JPS5216837B2 (enrdf_load_stackoverflow) * 1973-07-17 1977-05-11
JPS5316949B2 (enrdf_load_stackoverflow) * 1973-09-17 1978-06-05
DE2422940B2 (de) * 1974-05-11 1976-06-10 Werkzeugmaschinenfabrik Adolf Waldrich Coburg, 8630 Coburg Einrichtung zur steuerung der zustellbewegung eines rotierenden, von einer werkzeugspindel getragenen werkzeuges, insbesondere einer schleifscheibe
JPS5929391B2 (ja) * 1979-09-18 1984-07-20 株式会社井上ジャパックス研究所 砥石車
JPS57194824A (en) * 1981-05-21 1982-11-30 Nikko Kikai Kk Disk for grinding
JPS58223564A (ja) * 1982-05-10 1983-12-26 Toshiba Corp 砥石およびその製造法
DE3717568A1 (de) * 1987-05-25 1988-12-08 Lach Spezial Werkzeuge Gmbh Verfahren und vorrichtung zum mechanischen schleifen von werkstuecken mittels elektrisch leitfaehiger schleifwerkzeuge

Also Published As

Publication number Publication date
US5159785A (en) 1992-11-03
CH678827A5 (enrdf_load_stackoverflow) 1991-11-15
DE59006547D1 (de) 1994-09-01
ATE109057T1 (de) 1994-08-15
ES2057227T3 (es) 1994-10-16
EP0389870A3 (de) 1991-02-06
EP0389870A2 (de) 1990-10-03

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