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EP0329651B1 - Polierscheibe aus faserigem material und verfahren zum verwenden derselben - Google Patents

Polierscheibe aus faserigem material und verfahren zum verwenden derselben Download PDF

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Publication number
EP0329651B1
EP0329651B1 EP87904018A EP87904018A EP0329651B1 EP 0329651 B1 EP0329651 B1 EP 0329651B1 EP 87904018 A EP87904018 A EP 87904018A EP 87904018 A EP87904018 A EP 87904018A EP 0329651 B1 EP0329651 B1 EP 0329651B1
Authority
EP
European Patent Office
Prior art keywords
disk
slots
periphery
radial direction
fibrous material
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
EP87904018A
Other languages
English (en)
French (fr)
Other versions
EP0329651A1 (de
Inventor
Pierre-Marie Chapatte
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.)
POLINOX SA
Original Assignee
POLINOX SA
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 POLINOX SA filed Critical POLINOX SA
Publication of EP0329651A1 publication Critical patent/EP0329651A1/de
Application granted granted Critical
Publication of EP0329651B1 publication Critical patent/EP0329651B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
    • G04D3/00—Watchmakers' or watch-repairers' machines or tools for working materials
    • G04D3/02—Lathes, with one or more supports; Burnishing machines, with one or more supports
    • G04D3/0227—Lathes, with one or more supports; Burnishing machines, with one or more supports for the manufacture of special components for clockworks
    • G04D3/029—Lathes, with one or more supports; Burnishing machines, with one or more supports for the manufacture of special components for clockworks for components of the means protecting the mechanism from external influences, e.g. cases

Definitions

  • the first object of the present invention is a disc made of fibrous material for polishing metal parts, in particular parts of watch cases.
  • polishing operations play an essential role in the termination of certain metal parts, such as certain parts of watch cases, in particular parts made of a precious metal.
  • the required degree of polishing must be obtained in a perfectly regular manner over the entire surface of the part, and this as quickly as possible and without deformation of the part.
  • these requirements are particularly difficult to meet if the surfaces to be polished are complicated, such as for example the connection surfaces between the outer periphery of a middle part or of a case body and a hinge or a strap fixing horn.
  • US-A-2,146,548 describes abrasive wheels formed by a stack of fabric discs covered with abrasive material on their external face of the kind mentioned in the preamble of claim 1. Radial or oblique slots are provided. They all extend to the same depth.
  • the different elements are separated from each other at their periphery or retained by a central means.
  • the disc of the invention is characterized in that it forms a solid piece of said material and in that its periphery is cut into contiguous strips separated by thin slots, which have at all points of their length a direction oblique to the radial direction and which extend over varying depths so as to determine lamellae whose thickness remains approximately constant as a function of the depth.
  • the subject of the invention is also a method of polishing a metal part, in particular a watch case part, characterized in that a disc of the aforementioned type is used, the periphery of which is cut into contiguous strips separated by thin slits having, at all points along their length, an oblique direction with respect to the radial direction, and this disc is rotated at a sufficient speed so that, under the effect of centrifugal force, the lamellae are compressed l 'against the other at the periphery of the disc.
  • the polishing disc shown in fig. 1 is a massive, relatively hard felt disc with a diameter of around 30 cm.
  • the thickness of the disc is of the order of 10 mm.
  • This disc 1 has at its periphery a series of thin slots of different lengths.
  • the slots designated by 2 extend to a circle 3 whose diameter is approximately half the total diameter of the disc, while the slots designated by 4 which are interposed between the slots 2 extend in depth to a circle 5 of intermediate diameter between the periphery of the disc 1 and of the circle 3.
  • these different slots determine branched lamellae whose thickness varies relatively little as a function of the depth.
  • the slots can be cut in a straight line.
  • the number and therefore the thickness of the slats is not critical. In the embodiment described (diameter 30 cm) the number was, at the periphery of the disc, of 90. However, according to the needs this number can be modified.
  • the optimum angle of inclination of the slots depends on the application cases. It has been found that in some cases a value of 20 ° is advantageous, but this value is not limiting. It will also be noted that the angle of inclination of the slots could also be reversed with respect to the direction of rotation, from the example in FIG. 1.
  • the latter For carrying out a polishing operation by means of the disc 1, the latter is mounted so as to be driven in rotation in the direction of the arrow 7 in FIG. 1, at a speed such that under the effect of centrifugal force the various lamellae separated by the slots 2 and 4 are compressed against each other.
  • the resistance force is relatively high, while, if the application force is directed obliquely to the plane of the disc, the lamellae can easily deform laterally. This prevents wear of the part if it is a piece of soft metal, for example gold.
  • Fig. 3 schematically represents a type of middle designated by 8 comprising two hinges 9 of which all the outer surfaces are rounded in the manner of a rod. It has been found that on this type of middle, the rounded edges, in particular in the connection surfaces between the rod and the hinges, could be performed very quickly and easily without risk of wear of the part when using a disc 1 driven at the appropriate speed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Claims (5)

  1. Polierscheibe (1) aus faserigem Material zum Polieren von metallischen Stücken, insbesondere von Uhrgehäusestücken, welche schmale Schlitze (2,9) enthält, die an jedem Punkt ihrer Länge eine schräge Richtung hinsichtlich der radialen Richtung haben, und die an der Peripherie vorgesehen sind, dadurch gekennzeichnet, dass ein massives Stück aus besagtem Material gebildet ist, und dass seine Peripherie durch schmale Schlitze in aneinanderstossende Lamellen geschnitten sind, die sich derart auf unterschiedliche Tiefen erstrecken, dass die Lamellen, deren Dicke näherungsweise in Funktion der Tiefe konstant bleibt, festgelegt sind.
  2. Polierscheibe nach Anspruch 1, dadurch gekennzeichnet, dass der Verlauf der Schlitze leicht gekrümmt ist, wobei der Winkel hinsichtlich der radialen Richtung progressiv in dem Masse zunimmt, wie man sich dem Zentrum nähert.
  3. Polierscheibe nach Anspruch 1, dadurch gekennzeichnet, dass der Verlauf der Schlitze geradlinig ist.
  4. Polierscheibe nach Anspruch 1, dadurch gekennzeichnet, dass das faserige Material ein relativ harter Filz ist.
  5. Verfahren zum Polieren eines metallischen Stückes, insbesondere eines Uhrengehäusestückes, dadurch gekennzeichnet, dass eine Scheibe aus Filz gemäss Anspruch 1 verwendet wird, dessen Peripherie in aneinanderliegende Lamellen geschnitten ist, die durch schmale Schlitze getrennt sind, wobei die Schlitze an jedem Punkt ihrer Länge eine schräge Richtung hinsichtlich der radialen Richtung haben, und dass diese Scheibe mit einer ausreichenden Geschwindigkeit rotiert, so dass unter dem Einfluss der Zentrifugalkraft an der Peripherie der Scheibe eine Lamelle gegen die andere gedrückt wird.
EP87904018A 1986-06-03 1987-07-01 Polierscheibe aus faserigem material und verfahren zum verwenden derselben Expired - Lifetime EP0329651B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH223986A CH666377GA3 (de) 1986-06-03 1986-06-03

Publications (2)

Publication Number Publication Date
EP0329651A1 EP0329651A1 (de) 1989-08-30
EP0329651B1 true EP0329651B1 (de) 1992-08-19

Family

ID=4229102

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87904018A Expired - Lifetime EP0329651B1 (de) 1986-06-03 1987-07-01 Polierscheibe aus faserigem material und verfahren zum verwenden derselben

Country Status (3)

Country Link
EP (1) EP0329651B1 (de)
CH (1) CH666377GA3 (de)
WO (1) WO1989000092A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202020000786U1 (de) 2020-02-28 2021-05-31 Wendt Poliertechnik Gmbh & Co. Kg Polierwerkzeug
DE102020001283A1 (de) 2020-02-28 2021-09-02 Wendt Poliertechnik Gmbh & Co. Kg Polierwerkzeug
MX2022010370A (es) 2020-02-28 2022-11-08 Wendt Poliertechnik Gmbh & Co Kg Herramienta para pulir.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1926812A (en) * 1932-06-17 1933-09-12 John H Mcgrady Buffer wheel
US2039677A (en) * 1934-11-12 1936-05-05 Chas W House & Sons Polishing roll
GB456985A (en) * 1935-05-18 1936-11-18 Carborundum Co Improvements in abrasive articles
US2146548A (en) * 1937-02-19 1939-02-07 Curtiss Wright Corp Flexible abrasive disk
US2680335A (en) * 1951-12-29 1954-06-08 United Cotton Products Company Abrading device and method of making
FR2546098B3 (fr) * 1983-05-20 1986-08-22 Prigent Fernand Roue de polissage a lamelles souples

Also Published As

Publication number Publication date
WO1989000092A1 (fr) 1989-01-12
CH666377GA3 (de) 1988-07-29
EP0329651A1 (de) 1989-08-30

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