EP0606635A1 - Verfahren zum Herstellen von Schleifwerkzeugen und danach hergestelltes Werkzeug - Google Patents

Verfahren zum Herstellen von Schleifwerkzeugen und danach hergestelltes Werkzeug Download PDF

Info

Publication number
EP0606635A1
EP0606635A1 EP93120839A EP93120839A EP0606635A1 EP 0606635 A1 EP0606635 A1 EP 0606635A1 EP 93120839 A EP93120839 A EP 93120839A EP 93120839 A EP93120839 A EP 93120839A EP 0606635 A1 EP0606635 A1 EP 0606635A1
Authority
EP
European Patent Office
Prior art keywords
base body
grinding
abrasive coating
hot
grains
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Withdrawn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
EP93120839A
Other languages
German (de)
English (en)
French (fr)
Inventor
Hans-Joachim C/O A. Heumann Dr.-Ing. Wiemann
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.)
MECANO VORRICHTUNGSBAU GmbH
Original Assignee
MECANO VORRICHTUNGSBAU GmbH
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 MECANO VORRICHTUNGSBAU GmbH filed Critical MECANO VORRICHTUNGSBAU GmbH
Publication of EP0606635A1 publication Critical patent/EP0606635A1/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for

Definitions

  • the invention relates to a method for producing grinding tools with a base body which carries an abrasive coating, which consists of super-abrasives such as diamond grains or grains of cubic-crystalline boron nitride, which are finely distributed in a bond.
  • resin-bonded grinding wheels are used in particular for grinding tools that are equipped with hard and wear-resistant materials, such as hard metals or ceramic materials.
  • resin-bonded grinding wheels are used for processing high-alloy steels.
  • hard material grit of such grinding wheels consists of natural or artificial diamond or cubic-crystalline boron nitride as the abrasive.
  • Thermoplastic resins such as phenolic resins, which contain so-called fillers in addition to the finely divided hard material grains, are used as bonds of such super abrasives in synthetic resin-bonded grinding wheels, which contribute to stabilizing the plastic structure and its elasticity.
  • Such fillers consist, for example, of silicon carbide in different grain sizes.
  • Melamine resins, polyamides, poliimides and polisulfones can also be used as bindings.
  • the resins, fillers and super-abrasives are entered as mixtures in press molds made of hardened steel and pressed under high pressure and corresponding temperatures onto corresponding base bodies or abrasive carriers in order to convert them into a hardened one to transfer thermosetting condition.
  • Circumferential grinding wheels with, for example, 2 mm covering depth and a grinding covering length of several hundred millimeters cannot be produced in one piece by this known method, but must be assembled from several individual grinding wheels.
  • the problem of the connection at the seams, which in the circumferential direction are generally not allowed to be parallel, because otherwise there are visible grinding marks on the workpieces to be machined, for example during so-called plunge grinding.
  • the object of the invention is to make the method for producing grinding tools more economical. According to the invention, it is provided that the tool is vacuum-packed in an autoclave after the application of the abrasive coating on the base body in a film in a hot foil.
  • the method of manufacture according to the invention has the particular advantage over previously known methods that there is no need to use hardened and ground compression molds made of high-alloy steel since the base body in the method according to the invention is so can be prepared that the abrasive pads correspond to the required dimensions after their completion.
  • This is particularly the case if depressions are preformed in the base body for receiving the abrasive coating and this is exposed after hot pressing by partially turning off the base body and grinding the covering to size.
  • the preformed depressions have a volume which allows the resins to be processed, with their fillers and super-abrasives, to be filled in without pressure in the desired thickness or height.
  • the per se dry covering which consists of the resins, fillers and the hard material granules, with a small amount of liquid resin so that it is brought into a viscous, dough-like state.
  • a pretreatment can take place before the hot pressing in the autoclave in the manner of a pre-compression of the coating and a degassing in an oven.
  • the following procedural steps can preferably be carried out:
  • the base bodies are welded together with their coverings filled into the depressions in plastic films with simultaneous evacuation to a vacuum of, for example, 10 -1 Torr.
  • the welded tools of various shapes and sizes can then be cold-compacted simultaneously in an autoclave using a pressure of, for example, 3000 Newton / cm2.
  • the advantage can be taken of cold pressing or pre-compressing a large number of grinding tools of different types and sizes in a single operation in an autoclave.
  • the corresponding tools are removed from an electrically heated convection oven after removal of the foils and degassed in a cycle of about 2-3 hours at a temperature of about 90 °, since the resins are degassed at this temperature.
  • the degassed and pre-compressed coverings or tools are again sealed in foils and evacuated again to a vacuum of about 10 ⁇ 1 Torr, in order to be subsequently isostatically hot-pressed in an autoclave using pressure and temperature, whereby with pressures of 1500 - 4000 Newton / cm2 and a temperature of 180 - 350 ° C depending on the type of resin of the bond.
  • the tools are mechanically finished, in particular by finishing turning and regrinding in the area of the grinding surface for the purpose of exposing the grinding surface.
  • This finish machining is comparable to the machining of grinding tools, which are manufactured according to the known methods using hardened molds.
  • the implementation of the method according to the invention can also be simplified in that the coverings for their provisional hold are fastened to the base body with an adhesive with which the aforementioned depressions are to be spread, a plastic based on phenolic resin preferably being considered as the adhesive.
  • the cup grinding wheel 1 shown partially and in section in FIG. 1 has a base body 2 which consists of a synthetic resin or a metal or a combination of both. On its outside, the base body 2 is provided with an annular recess 4, which is incorporated by turning and extends to close to the upper edge of the base body 1. In this recess 3, the abrasive coating 8 is entered in a pasty form or in a dough-like state.
  • the abrasive coating 8 consists of the super abrasives, which are finely distributed in a bond made of phenolic resin, to which a filler or filler has been added, for example silicon carbide or aluminum oxide.
  • the base body 2 with the covering 6 is surrounded by a tubular plastic film, such as polyimide, which is evacuated.
  • the film 10 protects the covering 8 against that at one Pressing, both in cold pressing and in hot isostatic pressing, the gaseous press medium of the autoclave penetrates into the pores of the coating.
  • the arrangement of the film and the evacuation is therefore carried out first before cold pressing in an autoclave. If drying should then take place in an oven, the first film must be removed.
  • the base body is again covered with a film 10 and the film tube is evacuated.
  • the covering is compressed to a lower height, as indicated in FIG. 1.
  • the base body is reworked to expose the grinding surface 8.
  • the upper edge region of the tool 1 is turned off by the height "H”.
  • Post-processing can also be done of the exposed grinding surface is done by grinding.
  • a circumferential grinding wheel according to FIG. 2 is produced in the same way, so that the circumferential grinding wheel according to FIG. 2 can be produced simultaneously with a cup grinding wheel according to FIG.
  • the base body 2 is provided on its outer circumference with an annular recess 4, into which an adhesive is coated for a better hold of the covering 8 applied thereafter.
  • This covering 8 is inserted in the full height of the recess 4. Pressing under high pressure reduces its strength or height to the extent shown in FIG. 2. After the grinding wheel has been produced, the grinding covering 8 is exposed by twisting off the protruding sections of the base body 2, which are shown with double hatching in FIG.
  • FIG. 3 shows a grinding pin produced in a similar manner, which rotates about the axis AA. All of these three aforementioned embodiments can be produced simultaneously using the method described above, without the need for separate molds and, for example, hydraulic presses. All that is required for use is a commercially available autoclave, inside which both high pressure and high temperature can be generated in accordance with the respective requirements. In other words, different types of grinding tools of different sizes and different covering thicknesses or covering lengths can be produced at the same time without the need for the production and use of special molds.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
EP93120839A 1993-01-14 1993-12-23 Verfahren zum Herstellen von Schleifwerkzeugen und danach hergestelltes Werkzeug Withdrawn EP0606635A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4300722A DE4300722A1 (de) 1993-01-14 1993-01-14 Verfahren zum Herstellen von Schleifwerkzeugen und danach hergestelltes Werkzeug
DE4300722 1993-01-14

Publications (1)

Publication Number Publication Date
EP0606635A1 true EP0606635A1 (de) 1994-07-20

Family

ID=6478125

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93120839A Withdrawn EP0606635A1 (de) 1993-01-14 1993-12-23 Verfahren zum Herstellen von Schleifwerkzeugen und danach hergestelltes Werkzeug

Country Status (8)

Country Link
US (1) US5503648A (zh)
EP (1) EP0606635A1 (zh)
JP (1) JPH07504619A (zh)
CN (1) CN1091688A (zh)
BR (1) BR9306080A (zh)
DE (1) DE4300722A1 (zh)
RU (1) RU94042403A (zh)
WO (1) WO1994015753A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113664736A (zh) * 2021-07-20 2021-11-19 江苏华东砂轮有限公司 树脂结合剂固结磨具的制备方法及其制备的固结磨具

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5743185A (en) * 1995-01-17 1998-04-28 Mattel, Inc. Flexible thermally conductive stamp and material
DE19520404A1 (de) * 1995-06-08 1996-12-12 Mecano Vorrichtungsbau Gmbh Verfahren zum Herstellen von Schleifwerkzeugen und danach hergestelltes Werkzeug
KR20030079195A (ko) * 2002-04-02 2003-10-10 손석대 콜크분말이 첨가된 석재 연마용 패드 및 그 제조방법
DE102004019959B4 (de) * 2004-04-23 2008-02-21 Freimut Storrer Schleifwerkzeug
FI121654B (sv) * 2006-07-10 2011-02-28 Kwh Mirka Ab Oy Förfarande för tillverkning av en flexibel sliprondell och en flexibel sliprondell
FR2922362B1 (fr) * 2007-10-16 2009-12-18 Avancis Gmbh & Co Kg Perfectionnements apportes a un boitier de connexion pour elements capables de collecter de la lumiere.
CN101913049B (zh) * 2010-08-06 2013-08-21 中国一拖集团有限公司 一种增加金刚石工具涂层厚度的制备方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2845386A1 (de) * 1978-10-18 1980-04-30 Frank Dr Kasper Verfahren zur herstellung von schleifkoerpern aus pulverfoermigen bis koernigen ausgangsmaterial
EP0204195A2 (en) * 1985-05-20 1986-12-10 Norton Company Method for making vitrified bonded grinding tools
JPH02224976A (ja) * 1989-02-27 1990-09-06 Shin Etsu Handotai Co Ltd 内周式メタルボンド切断砥石の製造方法
EP0407069A2 (en) * 1989-07-06 1991-01-09 Unicorn Abrasives Limited Grinding tools

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3415635A (en) * 1966-07-28 1968-12-10 Toolmasters Ltd Method of making a grinding member
US4124401A (en) * 1977-10-21 1978-11-07 General Electric Company Polycrystalline diamond body

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2845386A1 (de) * 1978-10-18 1980-04-30 Frank Dr Kasper Verfahren zur herstellung von schleifkoerpern aus pulverfoermigen bis koernigen ausgangsmaterial
EP0204195A2 (en) * 1985-05-20 1986-12-10 Norton Company Method for making vitrified bonded grinding tools
JPH02224976A (ja) * 1989-02-27 1990-09-06 Shin Etsu Handotai Co Ltd 内周式メタルボンド切断砥石の製造方法
EP0407069A2 (en) * 1989-07-06 1991-01-09 Unicorn Abrasives Limited Grinding tools

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 9042, Derwent World Patents Index; AN 90-316520 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113664736A (zh) * 2021-07-20 2021-11-19 江苏华东砂轮有限公司 树脂结合剂固结磨具的制备方法及其制备的固结磨具
CN113664736B (zh) * 2021-07-20 2024-05-14 江苏华东砂轮有限公司 树脂结合剂固结磨具的制备方法及其制备的固结磨具

Also Published As

Publication number Publication date
BR9306080A (pt) 1997-11-18
JPH07504619A (ja) 1995-05-25
RU94042403A (ru) 1997-05-20
CN1091688A (zh) 1994-09-07
DE4300722A1 (de) 1994-07-21
US5503648A (en) 1996-04-02
WO1994015753A1 (de) 1994-07-21

Similar Documents

Publication Publication Date Title
DE2624854C3 (de) Rollendrückvorrichtung zum Herstellen eines becherförmigen Riemenscheiben-Rohteils
DE2160155C3 (de) Zusammengesetzte, hohen Beanspruchungen standhaltende Bauteile und Verfahren zu ihrer Herstellung
DE2219856B2 (de) Verfahren zum Herstellen von in einem Arbeitsgang geschmiedeten Sinterschmiedewerkstücken
DE60113767T2 (de) Verfahren zur Herstellung von Kraftfahrzeuglenkrädern, insbesondere Holzlenkräder mit einer Hülle aus hochwertigem Material, und durch ein solches Verfahren hergestellte Lenkräder
DE3150845C2 (zh)
EP0606635A1 (de) Verfahren zum Herstellen von Schleifwerkzeugen und danach hergestelltes Werkzeug
DE3705660C2 (zh)
EP0826450B1 (de) Verfahren zur Kalibrierung einer vorgeformten Ausnehmung
DE2129828A1 (de) Verfahren zur herstellung von verformten werkstuecken aus vorgefertigten, beschichteten spanplatten
EP1098104A2 (de) Verfahren und Vorrichtung zur Herstellung von Bremsbelägen
DE2614743A1 (de) Verfahren zur herstellung von schleifkoerpern
DE2453374B2 (de) Verfahren zur Herstellung von Druckkochtöpfen und Vorrichtung zur Durchführung dieses Verfahrens
DE2916709A1 (de) Werkzeuge mit schneiden aus harten stoffen
EP1268099A1 (de) Verfahren zum herstellen von bauteilen mittels eines fliessfähigen wirkmediums sowie eines formwerkzeugs
AT515475B1 (de) Herstellung einer Topfscheibe
DE723387C (de) Verfahren zur Herstellung von Hartmetallformstuecken
DE4447036C1 (de) Werkzeug zur Oberflächenbearbeitung von Werkstücken
DE890128C (de) Verfahren zur Herstellung von Schichtstoffpresslingen oder Gegenstaenden aus Kunstharzpressholz
DE3311865C1 (de) Verfahren zur pulvermetallurgischen Herstellung einer Warmarbeits-Werkzeugform
DE2417589A1 (de) Verfahren und anordnung zum herstellen von verdichteten legierten gegenstaenden mit einem inneren durchtritt
DE1571446C3 (de) Verfahren und Vorrichtung zum Formen von rohrförmigen Körpern aus pulverförmigem, insbesondere keramischem Material, mit wenigstens zwei Zonen verschiedener Zusammensetzung
DE19520404A1 (de) Verfahren zum Herstellen von Schleifwerkzeugen und danach hergestelltes Werkzeug
AT410359B (de) Verfahren zum herstellen eines reibringes für kupplungen oder bremsen
DE19505844B4 (de) Verfahren zum Herstellen und Verwenden eines Schleifringes für Schleifscheiben sowie Schleifring für Schleifscheiben und Vorrichtung zur Verfahrensdurchführung
AT225011B (de) Verfahren zum Herstellen von Formkörpern, z. B. Reibbelägen, aus Sintermetall

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE DE FR GB IT

17P Request for examination filed

Effective date: 19940530

17Q First examination report despatched

Effective date: 19950928

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19970121