EP0181104A2 - Meule-boisseau - Google Patents

Meule-boisseau Download PDF

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Publication number
EP0181104A2
EP0181104A2 EP85307436A EP85307436A EP0181104A2 EP 0181104 A2 EP0181104 A2 EP 0181104A2 EP 85307436 A EP85307436 A EP 85307436A EP 85307436 A EP85307436 A EP 85307436A EP 0181104 A2 EP0181104 A2 EP 0181104A2
Authority
EP
European Patent Office
Prior art keywords
wheel
grinding
cup
stock
axis
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Withdrawn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
EP85307436A
Other languages
German (de)
English (en)
Other versions
EP0181104A3 (fr
Inventor
Shoji Kobayashi
Kiyoshi Nishio
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.)
NISSEI INDUSTRIAL Co Ltd
Asahi Diamond Industrial Co Ltd
Nissei Industrial Co Ltd
Original Assignee
NISSEI INDUSTRIAL Co Ltd
Asahi Diamond Industrial Co Ltd
Nissei Industrial Co Ltd
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 NISSEI INDUSTRIAL Co Ltd, Asahi Diamond Industrial Co Ltd, Nissei Industrial Co Ltd filed Critical NISSEI INDUSTRIAL Co Ltd
Publication of EP0181104A2 publication Critical patent/EP0181104A2/fr
Publication of EP0181104A3 publication Critical patent/EP0181104A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
    • B24D7/02—Wheels in one piece

Definitions

  • the present invention relates to a cup-type grinding wheel which is used for surface grinding.
  • a surface grinding operation is known which is performed by passing workpieces 2, 2' to be ground under a rotating cup wheel 1 along an arcuate path as illustrated in Fig. 4. It is also known to effect another surface grinding operation as illustrated in Fig. 5, wherein the workpiece 2 to be ground is kept in one position and rotated about its own axis - as indicated by arrow 3. Although the first mentioned grinding operation is more frequently utilised, the latter operation is sometimes advantageous - depending upon the purpose of the working operation. In the operation as illustrated in Fig. 5 it is necessary to locate the axis of rotation 4 of the rotating of the workpiece 2 to be ground in the width W of an annular-shaped acting surface 5 of the wheel 1 as shown in Fig. 6.
  • a central portion of the workpiece surface 2 to be ground is left unground corresponding to the inside of a circle 6 with a radius corresponding to a spacing R.
  • a grinding wheel tends to wear due to effect of the grinding operation and the whole acting surfaoe of the wheel is not worn equally and it is the outer peripheral portion thereof which is worn to a greater extent. Because of the foregoing effect of wear, the acting surface assumes a oonical shape (each wall portion slanting in section) as indicated by reference numeral 17 of Fig. 8.
  • Fig. 8 illustrates the relationship between a wheel and a workpiece to be ground, wherein a workpieoe 12 to be ground, is placed on a rotary table 19 and an annular grinding body 11 is fixed to a' wheel stock 18 (or wheel mounting plate or body) thus forming a cup-type wheel. Whilst being shown in a somewhat exaggerated manner, the lower, acting surface of the grinding body is worn so as to have a conical shape as denoted by reference numeral 17. Although the rotary axis 21 of the workpieoe 12 to be ground passes through the central portion of an annular width W of the wheel, because of the effects of wear it assumes a relative positional relationship somewhat similar to that of Fig. 7 and as a result, a projection 20 is produced.
  • a cup-type grinding wheel comprising an annular grinding body (11) mounted to the peripheral portion of a wheel stock (18) in such a manner as to be eccentric with respect to the rotary axis (22) of the wheel.
  • a grinding machine including a oup-type grinding wheel as defined above, wherein said wheel is mounted to rotate about the axis of said wheel stock (18) and wherein mounting or support means for workpieces is located or locatable to rotate the workpieces about an axis which is cleared on opposite sides during the eccentric rotary action of the grinding body (11).
  • FIG. 1 and 2 A cup-type grinding wheel according to the present invention is illustrated in Figs. 1 and 2 and as will now be described.
  • an abrasive annular-shaped grinding body 11 (220 mm outer diameter and 2 mm width including a 230 mesh diamond powder in its resin bond) having a oentre 23 and which is eccentrically mounted on a wheel mounting plate, flange or stock 18.
  • the abrasive grinding body 11 contains abrasives such as diamond, CBN or the like abrasive material.
  • the eccentricity E i.e. the distance between oentre 23 of annular body 11 and the centre and axis of rotation 22 of stock 18, is set to be larger than the width W of the annular portion of the grinding wheel measured in a radial direction.
  • a centre hole 24 is provided in the stock 18 for mounting the wheel on a machine spindle (not shown).
  • the grinding body 11 Because of eccentricity of the grinding body 11, the grinding body 11 is caused to reciprocally grind between the left side 101 and the right side 101' of the rotary centre 21 of a workpiece 12 to be ground while travelling at a high speed in the circumferential direction as shown in Fig. 3. Accordingly, a projection, such as projection 20 shown in Fig. 8, is not produced.
  • the annular-shaped grinding body is eccentrically mounted on the wheel stock having a coaxis with the non-eccentric rotary axis. Accordingly, since only the grinding body is eccentrically rotated, unbalancing of rotation is extensively small when compared with the previously mentioned eccentric rotation of the whole wheel. Thus, balancing can be easily recovered by an adequate balancing operation.
  • the projection 20 is produced at the central portion of the grinding surface of the workpieoe 12 as shown in Fig. 9.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
EP85307436A 1984-11-05 1985-10-16 Meule-boisseau Withdrawn EP0181104A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP23282684A JPS61111887A (ja) 1984-11-05 1984-11-05 カツプ型砥石
JP232826/84 1984-11-05

Publications (2)

Publication Number Publication Date
EP0181104A2 true EP0181104A2 (fr) 1986-05-14
EP0181104A3 EP0181104A3 (fr) 1988-08-24

Family

ID=16945384

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85307436A Withdrawn EP0181104A3 (fr) 1984-11-05 1985-10-16 Meule-boisseau

Country Status (2)

Country Link
EP (1) EP0181104A3 (fr)
JP (1) JPS61111887A (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE804762C (de) * 1948-10-02 1951-04-30 Krusius Geb Vorrichtung zum Schleifen der Klingen von Messern u. dgl.
DE1652901A1 (de) * 1967-09-14 1971-04-29 Indiam Diamantwerkzeugfabrikat Schleifscheibe
DE1777089A1 (de) * 1968-09-04 1971-04-01 Winter & Sohn Ernst Stirnschleifscheibe
DE2026903A1 (de) * 1970-06-02 1971-12-16 J Konig + Co oHG, Werkzeugfabrik, 7500 Karlsruhe Schleifteller fur Handschleif maschinen
GB1539499A (en) * 1976-08-14 1979-01-31 Mueller Georg Kugellager Surface grinding of workpieces
FR2535640A1 (fr) * 1982-11-09 1984-05-11 Lignes Telegraph Telephon Meule diamantee et son utilisation

Also Published As

Publication number Publication date
JPS61111887A (ja) 1986-05-29
EP0181104A3 (fr) 1988-08-24

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Inventor name: NISHIO, KIYOSHI

Inventor name: KOBAYASHI, SHOJI