US3646653A - Method and tool for making a watch dial with raised symbols - Google Patents

Method and tool for making a watch dial with raised symbols Download PDF

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Publication number
US3646653A
US3646653A US817970A US3646653DA US3646653A US 3646653 A US3646653 A US 3646653A US 817970 A US817970 A US 817970A US 3646653D A US3646653D A US 3646653DA US 3646653 A US3646653 A US 3646653A
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US
United States
Prior art keywords
blank
dial
depression
cushion
raised
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
US817970A
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English (en)
Inventor
Pierre Richard
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.)
JAP
Original Assignee
JAP
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Filing date
Publication date
Application filed by JAP filed Critical JAP
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Publication of US3646653A publication Critical patent/US3646653A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/021—Deforming sheet bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/021—Deforming sheet bodies
    • B21D26/029—Closing or sealing means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44B—MACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING
    • B44B5/00—Machines or apparatus for embossing decorations or marks, e.g. embossing coins
    • B44B5/02—Dies; Accessories
    • B44B5/026—Dies
    • 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
    • G04D3/0002—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe
    • G04D3/0043—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe for components of the time-indicating mechanisms
    • G04D3/0048—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe for components of the time-indicating mechanisms for dials
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F7/00—Signs, name or number plates, letters, numerals, or symbols; Panels or boards
    • G09F7/16—Letters, numerals, or other symbols adapted for permanent fixing to a support
    • G09F7/165—Letters, numerals, or other symbols adapted for permanent fixing to a support obtained by a treatment of the support
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49579—Watch or clock making
    • Y10T29/49583—Watch or clock making having indicia, face, or dial
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49805—Shaping by direct application of fluent pressure

Definitions

  • the invention relates to a method for making watch dials with raised symbols that are formed in one piece out of the dial during fabrication of the latter, one part of the forming tool having hollows corresponding to the symbols to be raised.
  • the invention also relates to a tool for carrying out the method and to the raised dial obtained with the method of the invention.
  • the raised symbols are obtained by stamping a dial blank having a thickness corresponding to that of the final dial, the thickness of the stamped blank then being equal to that of the dial.
  • thin dials such as watch dials, which commonly have a thickness of forty one-hundreths mm.
  • the raised symbols are formed using male and female dies. This operation can be performed using presses less powerful than the stamping presses for the previously described known methods.
  • To form the symbols there is required not only a female die having hollows corresponding to the negative of the symbols that are to be raised but also a male die incorporating the positive of these symbols.
  • the male and female dies must precisely match. Consequently, the tools required for this kind of stamping are much more expensive than those for the kind of stamping previously described.
  • An object of the invention is a method for obtaining watch dials with raised symbols that avoids all of the aforementioned disadvantages.
  • Another object of the invention is a forming tool for carrying out the method of the invention.
  • a further object of the invention is the watch dial with raised symbols obtained with the method of the invention.
  • FIG. 1 is a side view partly in section showing the dial blank and the forming tool at one step of the method.
  • FIG. 2 is a view similar to that of FIG. 1, showing a second step of the method.
  • the forming tool comprises a first part consisting of a die I.
  • the die embodies in its upper face a bowl-shaped depression 2, the diameter of which is less than that of the dial blank 3, but larger than that of the final dial.
  • the die 1 has two blind holes 4 which receive the dial feet 5. The diameter of these holes is slightly greater than that of the feet so as to provide a small amount of play within the holes.
  • the holes 4 are deeper than the feet 5 are long.
  • An annular projection 6, triangular in cross section, forms the rim of the depression 2.
  • a flat face 7 surrounds the projection. The height of the projection 6 above the face 7 is less than the thickness of the blank 3. If the latter has a thickness of forty one-hundredths mm., the height of the projection 6 above the face 7 is preferably between twenty and twenty-five one-hundredths mm.
  • the forming tool illustrated comprises a second part consisting of a punch 8, which has the same outer diameter as the die face 7.
  • the lower face 9 of the punch is flat, and incorporates hollows l0 constituting the negative of the symbols that are to be raised in the dial.
  • the first step is to fill the depression 2 and the holes 4 completely with a substance that forms a cushion l l.
  • the cushion can consist of any liquid or pasty substance, such as water or of an aqueous solution of starch, of oil, or of a heavy grease.
  • a transparent substance is preferably chosen, making the holes 4 visible through the cushion l 1.
  • the depression 2 is filled up until the cushion 11 forms a convex meniscus above the upper edge of the projection 6, thereby ensuring that the entire central part of the reverse side of the blank 3, extending above the depression 2, is in direct contact with the cushion 11, when the blank is placed on the die 1, as shown in FIG. 1.
  • the cushion is made of a pasty material, care is taken to fill the depression 2 with a sufficient quantity of the material to ensure the same direct contact.
  • the blank 3 After having filled the depression 2 in the manner described, the blank 3 is placed in the position seen in FIG. I, the feet 5 being introduced into the die holes 4. Since the depression 2 is brimming over with the liquid or pasty substance, the blank does not immediately fall to the position shown in FIG. 1; instead, it floats on the cushion 11, above the annular projection 6. If the blank is slightly pressed on, the excess amount of substance in the depression 2 flows over the projection 6 until the blank rests on the latter, as seen in FIG. 1, in which the dial blank is in position for forming.
  • the forming is done by forcibly and abruptly lowering the punch 8 against the blank until there is reached the position seen in FIG. 2.
  • the pressure on the latter causes the projection 6 to penetrate into the reverse of the blank.
  • the cushion 11 is subjected to tremendous pressure, since the central part of the blank is forced within the depression 2, as seen in FIG. 2.
  • the pressure of the blank on the cushion 11 is spread over the entire area of the latter, causing those parts of the blank located opposite the punch hollows 10 to enter the latter and to form the raised symbols 12. Since both liquids and pasty substances easily take on the shape of the container holding them, the portions 11a of the cushion 11 enter the punch hollows l0, forcing the material of the blank 3 into intimate contact with the sides and bottoms of the hollows 10.
  • the forming operation described can be carried out using a small friction fly press developing a maximum of 30 or so tons pressure.
  • the punch 8 compresses on the die face 7 the blank edge 13 located outside of the projection 6, as seen in FIG. 2.
  • the projection 6 Since the volume occupied by the blank 3 in the depression 2 is substantially greater than the sum of the volumes of the cushion portions 1 la forced into the punch hollows 10, it is essential that the projection 6 does not constitute a perfectly sealed joint. It must permit the liquid or paste of the cushion 11 to escape between the blank and the projection 6, when the blank has already been raised against the bottom of the hollows 10 while the punch 8 continues to descend. Otherwise, the joint constituted by the projection 6 must not permit the liquid or the paste of the cushion 11 to escape until the symbols are completely formed. If necessary, the effectiveness of this joint can be improved by tiny projections or grooves (not shown) incorporated in the punch face 9 opposite the projection 6. To the same end, a second projection (not shown), concentric to the projection 6, can be provided in the die face 7.
  • the raised symbols have perfectly flat side and upper faces meeting in sharp and very well defined corners.
  • the symbol 12 shown in the drawing is constituted by a bar.
  • the method of the invention can be used, however, to form in the blank 3 raised symbols of any desired shape in plan view. These symbols can be Arabic numerals or a trademark consisting of letters or of a design.
  • the feet 5 are previously fixed to the blank; instead, they can be fixed after the forming.
  • the raised symbols can be formed in any area of the dial and completely independently of the position occupied by the feet 5.
  • the foot 5 comes to be positioned within the symbol 12.
  • Tests undertaken with the foot coming to be positioned on the sides 14 of the symbol 12 demonstrate that this location is not disadvantageous; the solder connection of the foot to the side 14 holds perfectly, and the foot remains held to the side with all of the tightness desired.
  • a play of a few hundredths of a millimeter of the feet 5 in their holes 4 is sufficient to ensure that the pressure caused by part of the blank 3 forced into the depression 2 is transmitted to the liquid or paste at the bottom of these holes.
  • the method described can be used at any stage during the manufacture of the dial. in particular, it is altogether possible to carry out all of the finishing operations on the obverse 15 of the blank.
  • the finest surface finish is not harmed by the forming operation.
  • the manufacturer is therefore free to prepare a number of blanks beforehand, and to finish the obverses 15 of these blanks while preparing the forming tools, particularly the punch 8, which is the part of the forming tool requiring the most time to be made ready.
  • the openings embodied in the blank 3 for the hands do not prevent use of the described method. While forming, these openings are actually closed by the punch face 9. It is only necessary to prevent droplets of the substance constituting the cushion 11 from passing through these openings and onto the obverse 15 of the blank, when the latter is placed on the die 1. For this purpose, the openings can be covered with adhesive paper.
  • the forming can be done by the method described, the date aperture being cut out only after the forming is completed.
  • the raised symbols obtained with the method of the invention can be faceted, of course, after the forming.
  • the finished face of the blank 3 can be covered with a protective coat of lacquer of the sort regularly used in the manufacture of dials. Tests have shown that the described forming method does not damage this coating, and after forming the coating was removed from only those areas of the symbols that were to be faceted. These uncovered areas can be colored as desired, with a view to obtaining the wanted contrast with the dial background.
  • the obverse 15 of the blank In order to apply to the sides 14 of the symbols 12 a color different from that of the dial background, the obverse 15 of the blank must be covered with a protective coating that is destroyed in those areas where the symbols are raised out of the surface of the blank. To this end, adhesive paper or a hard lacquer can be applied to the blank.
  • the blank After forming, the blank is easily taken up by a suction gripper for the purpose of removing the edge of the blank by turning on a lathe, for example, and to give the dial its final diameter. During this operation the dial can also be cambered.
  • the dial obtained with the method of the invention has the appearance of a dial with applied symbols, but at a much lower cost price.
  • a method for making watch dials with raised symbols that are formed in one piece out of the dial during fabrication of the latter including the step of stamping a dial blank with a forming tool comprising two parts consisting of a punch and of a die, one of these two parts incorporating hollows corresponding to the negative of the symbols to be raised in the dial blank, and wherein the improvement comprises the further steps, before stamping, of filling a depression of the other part of the forming tool with a liquid or pasty substance for forming a cushion in the depression and of placing the blank on the cushion so that it is in direct contact therewith.
  • a press-forming tool for making watch dials with raised symbols integrally formed in said dials comprising two parts, a punch and a die, a first one of said two tool parts having a depression for holding a liquid or pasty substance to act as a cushion and support for a blank when said two parts press against each other, a second one of said two tool parts having hollows corresponding to the negative of the symbols that are to be raised in the die blank; and wherein the blank is larger in diameter than a final dial formed therein and said depression is round in plan view and has a diameter between those of the blank and of the dial.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Adornments (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
US817970A 1968-04-26 1969-04-21 Method and tool for making a watch dial with raised symbols Expired - Lifetime US3646653A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH623668A CH524173A (fr) 1968-04-26 1968-04-26 Procédé de fabrication d'un cadran d'horlogerie et cadran obtenu par ce procédé

Publications (1)

Publication Number Publication Date
US3646653A true US3646653A (en) 1972-03-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
US817970A Expired - Lifetime US3646653A (en) 1968-04-26 1969-04-21 Method and tool for making a watch dial with raised symbols

Country Status (7)

Country Link
US (1) US3646653A (ja)
JP (1) JPS5120911B1 (ja)
AT (1) AT300674B (ja)
CH (2) CH623668A4 (ja)
DE (1) DE1919388C3 (ja)
FR (1) FR1597916A (ja)
GB (1) GB1227913A (ja)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3914969A (en) * 1973-04-18 1975-10-28 Nasa Apparatus for forming dished ion thruster grids
US3934441A (en) * 1974-07-08 1976-01-27 Rockwell International Corporation Controlled environment superplastic forming of metals
US4048934A (en) * 1976-07-29 1977-09-20 Reynolds Metals Company Method of bottom embossing
US4748837A (en) * 1985-12-11 1988-06-07 Hitachi, Ltd. Method of forming spherical shells
US5157969A (en) * 1989-11-29 1992-10-27 Armco Steel Co., L.P. Apparatus and method for hydroforming sheet metal
US5865054A (en) * 1989-08-24 1999-02-02 Aquaform Inc. Apparatus and method for forming a tubular frame member
US6708543B2 (en) * 2000-03-23 2004-03-23 Araco Kabushiki Kaisha Sheet-metal formed with spaced projections and manufacturing method of the same
US20050135198A1 (en) * 2003-12-23 2005-06-23 Alexander Wellen Tactile timepiece
US20090081931A1 (en) * 2007-09-21 2009-03-26 Hantover, Inc. Blade dressing tool
US20120135264A1 (en) * 2009-08-05 2012-05-31 Gi.Di. Meccanica S.P.A. Method for obtaining an opening in a hollow-body member, and a hollow-body member provided with one or more openings obtained with said method
CN108508728A (zh) * 2018-04-20 2018-09-07 依波精品（深圳）有限公司 表盘字钉的制造方法、表盘及手表
CN112445119A (zh) * 2019-08-27 2021-03-05 广州市恒上钟表配件有限公司 一种手表表盘冲凸加工工艺

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2638949C3 (de) * 1976-08-28 1981-04-02 Robert Bosch Gmbh, 7000 Stuttgart Verfahren zum Anformen von Zapfen an einer Platine
GB2208619B (en) * 1987-08-15 1991-11-13 Austin Rover Group A sheet metal drawing tool and methods of making and using same.
DE69939973D1 (de) * 1999-03-24 2009-01-08 Eta Sa Mft Horlogere Suisse Verfahren zur Herstellung von Anzeigeorganen für Uhren und nach diesem Verfahren hergestelltes Anzeigeorgan
DE10136860B4 (de) * 2001-07-27 2009-01-15 Grinbaum, Jan, Dipl.-Ing. Verfahren und Vorichtung zum Umformen oder Lochen

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2726973A (en) * 1952-05-24 1955-12-13 North American Aviation Inc Method of and apparatus for forming and quenching metal
US2728317A (en) * 1951-10-23 1955-12-27 Walton S Clevenger Apparatus for hydraulic die forming
US3277562A (en) * 1964-02-11 1966-10-11 Huguenin & Cie Method for manufacturing clock dials

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2728317A (en) * 1951-10-23 1955-12-27 Walton S Clevenger Apparatus for hydraulic die forming
US2726973A (en) * 1952-05-24 1955-12-13 North American Aviation Inc Method of and apparatus for forming and quenching metal
US3277562A (en) * 1964-02-11 1966-10-11 Huguenin & Cie Method for manufacturing clock dials

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3914969A (en) * 1973-04-18 1975-10-28 Nasa Apparatus for forming dished ion thruster grids
US3934441A (en) * 1974-07-08 1976-01-27 Rockwell International Corporation Controlled environment superplastic forming of metals
US4048934A (en) * 1976-07-29 1977-09-20 Reynolds Metals Company Method of bottom embossing
US4748837A (en) * 1985-12-11 1988-06-07 Hitachi, Ltd. Method of forming spherical shells
US5865054A (en) * 1989-08-24 1999-02-02 Aquaform Inc. Apparatus and method for forming a tubular frame member
US5157969A (en) * 1989-11-29 1992-10-27 Armco Steel Co., L.P. Apparatus and method for hydroforming sheet metal
US5372026A (en) * 1989-11-29 1994-12-13 Armco Steel Company Apparatus and method for hydroforming sheet metal
US6708543B2 (en) * 2000-03-23 2004-03-23 Araco Kabushiki Kaisha Sheet-metal formed with spaced projections and manufacturing method of the same
US20050135198A1 (en) * 2003-12-23 2005-06-23 Alexander Wellen Tactile timepiece
US7079454B2 (en) 2003-12-23 2006-07-18 Alexander Wellen Tactile timepiece
US20090081931A1 (en) * 2007-09-21 2009-03-26 Hantover, Inc. Blade dressing tool
US20120135264A1 (en) * 2009-08-05 2012-05-31 Gi.Di. Meccanica S.P.A. Method for obtaining an opening in a hollow-body member, and a hollow-body member provided with one or more openings obtained with said method
US9308565B2 (en) * 2009-08-05 2016-04-12 Gi. Di. Meccanica S.P.A. Method for obtaining an opening in a hollow-body member, and a hollow-body member provided with one or more openings obtained with said method
CN108508728A (zh) * 2018-04-20 2018-09-07 依波精品（深圳）有限公司 表盘字钉的制造方法、表盘及手表
CN108508728B (zh) * 2018-04-20 2023-08-01 依波精品（深圳）有限公司 表盘字钉的制造方法、表盘及手表
CN112445119A (zh) * 2019-08-27 2021-03-05 广州市恒上钟表配件有限公司 一种手表表盘冲凸加工工艺

Also Published As

Publication number Publication date
AT300674B (de) 1972-08-10
CH524173A (fr) 1971-03-31
CH623668A4 (ja) 1971-03-31
DE1919388A1 (de) 1969-11-20
DE1919388C3 (de) 1975-05-15
DE1919388B2 (de) 1974-09-05
JPS5120911B1 (ja) 1976-06-29
GB1227913A (ja) 1971-04-15
FR1597916A (ja) 1970-06-29

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