• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a strapping machine for decorating metal parts, comprising: an abrasive belt drive mechanism for moving an abrasive belt (6) relative to the workpiece (9); a mechanism for rotating the workpiece (9) with respect to the abrasive belt (6); rollers (14A, 14B, 14C) arranged for lateral holding of the workpiece (9) during strapping.
    公开号:CH710037A1
    申请号:CH01309/14
    申请日:2014-08-29
    公开日:2016-02-29
    发明作者:Damien Meusy
    申请人:Mec Assist Damien Meusy；
    IPC主号:
    专利说明:

    Technical area
    The present invention relates to a machine and a strapping process for the decoration of metal parts. Such a machine can be used for example in watchmaking, for the decoration of one or two sides of a flat part, for example wheels.
    State of the art
    The strapping is frequently used in watchmaking for the decoration of flat parts, including wheels and gears metal, for example steel, brass, nickel silver, aluminum, precious metal etc. It consists in softening at least one side of the piece by turning it against an abrasive surface, so as to produce fine circular features.
    [0003] Traditionally, the strapping of the wheels in watchmaking is carried out with a charcoal stick pressed against the face to be circled in rotation.
    [0004] Manual strapping machines are also known in which the operator raises the workpiece under a rotating spindle and then manually lowers it against a rotating band.
    There are also fully automatic strapping machines, in which the piece to be circled is loaded by an arm on a spindle and then lowered against the abrasive belt.
    These known strapping machines only allow to machine parts that can be maintained by their center. The loading of the pieces to be circled so as to be able to drag them through the center is, however, slow and imprecise. On the other hand, it is sometimes desired to strapped parts not pierced, or not yet drilled.
    Brief summary of the invention
    An object of the present invention is to provide a strapping machine different from known strapping machines.
    Another object of the invention is to provide a strapping machine that allows to circulate non-pierced parts.
    Another object of the invention is to provide a strapping machine that allows to circle parts without marking them.
    According to the invention, these objects are achieved in particular by means of a strapping machine for decorating metal parts, comprising:an abrasive belt drive mechanism for moving an abrasive belt relative to the workpiece;a mechanism for rotating the workpiece to be circled with respect to the abrasive belt;rollers arranged for lateral holding of said piece to be circled during strapping.
    This machine has the advantage of allowing the capture of parts of virtually any shape, including parts devoid of central hole.
    It also offers the advantage of allowing lateral retention of the part to be circled by its periphery, therefore without marking the part.
    In a preferred embodiment, the rotation mechanism comprises a pin, which can be movable vertically above the piece to be circled. A compressible member may be rotated by the spindle and press the workpiece against the abrasive belt during strapping. Thus, the vertical support against the band is exerted through a compressible part, without risking marking the part.
    The spindle may be mounted on an elastic spring to compensate for any vertical accuracy tolerances, strapping pieces of varying thickness or wear of the compressible part.
    The compressible element can be arranged to press against the rollers during strapping, so as to rotate the rollers to drive the workpiece by its periphery.
    In addition, the compressible element can be arranged to support the piece to be circled against the abrasive belt during the strapping.
    A centering piece movable relative to the abrasive belt may be provided to center the workpiece to be circled under the rotation mechanism.
    The centering piece may comprise a concave portion V to push and center the piece before strapping.
    The centering piece may for example move in a direction perpendicular to the direction of travel of the abrasive belt.
    At least one of the rollers can be mounted under the centering piece.
    In one embodiment, two of the rollers are mounted on one side of the workpiece to be circled with respect to the abrasive belt, while a third roller is mounted on the other side of the workpiece relative to the workpiece. to the abrasive belt.
    The third roller is advantageously positioned relative to said piece to be circled so that the tangent of the roller at the point of contact with the piece to be circled is not parallel to the direction of travel of the abrasive belt. The third roller can thus hold the workpiece and prevent it from being driven by the abrasive belt.
    According to an aspect independent of the other aspects above, the strapping machine for decorating metal parts may comprise:an abrasive belt drive mechanism for moving an abrasive belt relative to the workpiece;a mechanism for rotating the workpiece to be circled with respect to the abrasive belt;the machine being arranged so that the piece to be strapped is straddling the edge of the abrasive belt during the strapping, so as to allow the evacuation of dust from the side of the strip.
    The dust produced by the abrasion and fall next to the abrasive belt, under the part of the cantilevered part.
    This feature can optionally be combined with the other features listed above.
    A dust extraction system can be provided under the portion of the piece that protrudes next to the abrasive belt.
    The strapping machine may include a motorized ejection door to allow the ejection of coins after strapping. The hatch can be provided on the side of the abrasive belt. The machined parts can thus end up in a drawer under the machine tray.
    The hatch may include a dust suction system to suck the machining dust.
    A mechanical evacuation mechanism may be provided to repel the rimmed parts in the hatch.
    The evacuation mechanism may include the centering piece.
    A first jack may be provided to move the centering piece in the centering position, so as to position the workpiece to be centered under the pin and between the rollers.
    A second jack may be provided to move the centering piece in the ejection position, so as to push the piece to be centered in the hatch after the opening of the latter.
    A blowing mechanism may be provided to help the rimmed parts to fall into the hatch, preventing them from getting stuck for example on the upper surface of the hatch.
    The supply of rim wheels can be performed manually, by means of a tray arranged to facilitate the approximate positioning of the rim wheels.
    The machine can thus operate in semi-automatic mode; the loading and the turning of the parts is manual, but the positioning, the maintenance, the rotation of the part, the advance of the band and the ejection of the piece after strapping are automated and form a cycle.
    A sensor can detect the position of the tray and prevent strapping when the tray is misplaced.
    The invention also relates to a method of strapping pieces of metal parts, comprising:translation drive of an abrasive belt;positioning and holding said piece to be circled by its periphery during the strapping;rotating the workpiece to be circled relative to the abrasive belt.
    Brief description of the figures
    Examples of implementation of the invention are indicated in the description illustrated by the appended figures in which:<tb> Fig. 1 <SEP> illustrates a perspective view of the complete strapping machine.<tb> Fig. 2 <SEP> illustrates a perspective view of a detail of the machine before centering the workpiece, showing in particular the rollers, the hatch and the centering device.<tb> Fig. 3 <SEP> illustrates a perspective view of a detail of the machine after the centering of the workpiece, showing in particular the rollers, the hatch and the centering device.<tb> Fig. 4 <SEP> schematically illustrates a top view of the workpiece, rollers and centering device after centering<tb> Fig. 5 <SEP> schematically illustrates a sectional view of the workpiece, rollers and centering device after centering<tb> Fig. 6 <SEP> illustrates a perspective view of a detail of the machine after the strapping of the workpiece, showing in particular the rollers, the open hatch and the centering device.<tb> Fig. 7 <SEP> illustrates a perspective view of a detail of the machine, showing in particular the pin and the elastically compressible element.<tb> Fig. 8 <SEP> illustrates another perspective view of the part, the rollers and the centering device after centering<tb> Fig. 9 <SEP> illustrates the drive mechanism of the abrasive belt.
    Example (s) of embodiment of the invention
    FIG. 1 illustrates a perspective view of a strapping machine 1 for the decoration of metal parts 9. Strapping is obtained by rapidly rotating the workpiece 9 with respect to the abrasive belt 6, so as to produce concentric circles on the lower surface of the room. The abrasive belt is driven on the table 2 by the drive mechanism 8, described below in relation to FIG. 9, between a supply reel 82 upstream and a downstream unloading reel 83. The machine is controlled by a numerical control, for example a CNC, a PLC, a PC, etc. Elbow rests 4 are provided for the operator. The machine is advantageously semi-automatic, in that the supply of the machine with each part is performed manually by an operator, by means of the supply tray 7. Once the part is positioned approximately by means of this plateau, the operator simultaneously presses the two buttons 16 to trigger a ring cycle. The cycle comprises the precise centering of the workpiece 9, its support against the abrasive belt rotation for a predetermined time, and possibly the ejection by the ejection door.
    An unillustrated sensor can detect the position of the supply tray 7 and prevent strapping when the tray is misplaced.
    FIG. 2 illustrates a detail of the strapping machine before the precise centering of the workpiece 9. This piece has just been loaded in an approximate position by the operator by pushing it from the plate 7 or by means of tweezers. The figure shows in particular the centering piece 13 which can be moved in the direction y, for example by means of a jack. The direction is advantageously perpendicular to the direction of travel d of the abrasive belt 6. The centering piece comprises a centering portion 140 concave V to push the piece and position it at the intersection between the two branches of V.
    Two drive rollers 14A and 14B are arranged under the lower face of the centering piece 13. They contribute, with the branches of the V 130, to push and position the piece 9 during the centering phase, then to train this piece during the strapping phase, as will be seen later.
    A third roller 14 C is mounted on the other side of the part 9 relative to the abrasive belt 6. The three rollers cooperate to tighten and drive the workpiece to surround by the periphery during the strapping. The maintenance of the part is obtained by moving the two rollers 14A, 14B with the part 13 during the centering phase.
    The third roller 14C is advantageously mounted on an ejection flap 15 which can be opened to eject the piece after its strapping, in order to store it in a drawer (not shown) under the table 2, for intermediate storage rimmed pieces.
    An unillustrated sensor can detect the correct positioning of the drawer and prevent strapping if the drawer is not positioned correctly.
    The two rollers 14A and 14B are thus maintained by their axes in bearings arranged above the rollers, in the lower face of the centering member 13. The roller 14C is maintained by its axis in a bearing arranged below this roller, in the hatch 15.
    In an advantageous embodiment, the three rollers 14A-C are arranged to form a non-isosceles triangle, as shown in FIG. 4. In this example, the two rollers 14A and 14B are arranged on a line parallel to the running direction d of the abrasive belt 6. The third roller 14C is placed downstream of the bisector between these two rollers, so that that the tangent t to this roller at the point of contact with the piece to be circled 9 is not parallel to the direction d. This advantageous arrangement allows the roller 14C to retain the part 9 and prevent it being driven by the strip 6 beyond the rollers.
    FIG. 3 illustrates the strapping machine during the strapping of the part, after the precise positioning of the piece by means of the centering piece 13. As seen in this figure, the piece 9 is straddling the edge of the strip abrasive 6 and protrudes on the edge of this strip. This advantageous feature can also be used with a strapping machine in which the workpiece is driven by its center. The part 9 is rotated in this position, which allows the dust and debris resulting from abrasion to fall under the portion of the cantilevered piece next to the abrasive belt. This avoids rapid jamming of the abrasive belt by the abrasion debris. A suction system may be provided to suck up these dusts through the openings 150 formed in the upper face of the hatch 15.
    The piece to be circled is rotated through a compressible element 12 rotated by the pin 10 (Figures 5 and 7). The compressible element 12 supports the piece 9 against the abrasive belt 6 to ensure sufficient pressure for abrasion and perfect flatness of this piece.
    The compressible element 12 may for example be rubber, synthetic material, or other soft material so as not to scratch the part 9 and to adapt to the shape of the workpiece and rollers. The pin 10 can be mounted under a spring to ensure a virtually constant vertical pressure regardless of the thickness of the part 9 and the compressible element 12.
    The diameter of the compressible element 12 is preferably slightly greater than the diameter of the piece to be circled 9, so as to partially cover the three rollers 14A to 14C. Since the height of the rollers is not necessarily equal to the thickness of the workpiece 9 (which may be variable), the element 12 is deformed slightly in order to bear on the upper surface of the workpiece 9 and on the three pebbles. Advantageously, the upper edge of the rollers 14A to 14C forms a chamfer 140 to facilitate this support.
    This arrangement thus allows the part 9 to be driven both by its upper face and by the three rollers 14A-14C rotated by the compressible element 12. The part is therefore both driven by one of its flat faces and by its periphery. This ensures a regular rotation of the workpiece, perfectly concentric with rotation of the spindle 10.
    FIG. 6 illustrates a detail of the strapping machine 1 at the end of the strapping cycle. In this step, the hatch is opened for example by means of a cylinder provided for this purpose, and the piece 9 is pushed into this hatch by the centering piece 13 moved perpendicularly to the direction d through another cylinder. It is also possible to use a single jack for moving the piece 13 in the ejection position and for opening the hatch.
    A blowing system 151 may be provided under the band so as to blow the rimmed parts and facilitate their ejection through the hatch 15. This blowing system allows in particular to prevent the ejected parts are blocked against the roller 14C or against other elements protruding from the upper face of the hatch 15 open. The air is advantageously blown in a substantially horizontal direction, perpendicular to the direction d, in order to push the parts away from the abrasive belt 6.
    The opening of the hatch 15 and the ejection of the piece 9 in the hatch 15 through the centering piece 13 can be performed after each strapping operation of a face. In this case, the machining cycle comprises the following steps:approximate positioning of a part 9 by the operator;centering the workpiece by means of the centering piece 13;lowering the pin 10 so as to press the flange face of the piece 9 against the strip 6;translating the band 6 (optional), and rotating the spindle 6 so as to rotate the part 9 through the compressible element 13 and the rollers 14A-14C;stopping the spindle and, if necessary, stopping the abrasive belt;opening of the hatch 15;ejection of the circled piece 9 by pushing it into the hatch 15 by means of the centering piece and dejection 13 moved to the ejection position.
    In the case of parts whose two opposite faces must be rimmed, it is also possible to control the opening of the hatch and the ejection only after the machining of both faces. In this case, the machining cycle comprises the following steps:approximate positioning of a part 9 by the operator;centering the workpiece by means of the centering piece 13;lowering the pin 10 so as to press the first face of the part 9 against the strip 6;translating the band 6 (optional), and rotating the spindle 6 so as to rotate the part 9 through the compressible element 13 and the rollers 14A-14C;stopping the spindle and, if necessary, stopping the abrasive belt;lifting of the spindle 10;turning the workpiece 9 by the operator;lowering the pin 10 so as to press the second face of the part 9 against the strip 6;translating the band 6 (optional), and rotating the spindle 6 so as to rotate the part 9 through the compressible element 13 and the rollers 14A-14C;stopping the spindle and, if necessary, stopping the abrasive belt;opening of the hatch 15;ejection of the circled piece 9 by pushing it into the hatch 15 by means of the centering piece and dejection 13 moved to the ejection position.
    In one embodiment, a cutting and cleaning cycle of the compressible element 13 may be programmed and executed from time to time in order to smooth out and clean the lower face of the element 13. This cutting cycle is similar to the cycle described above for strapping a single face of a workpiece, but is performed without introducing a workpiece, so that the compressible element 13 rubs directly against the abrasive belt 6.
    FIG. 9 illustrates a portion of the drive mechanism of the abrasive belt 6. The strip from the left of the figure passes under the motorized roller 80 which drives it. An idler roller 81 is supported by a not shown spring against the first roller 80, so as to pinch the strip 6 between the two rollers and to prevent it from slipping on the periphery of the roll. The strip thus driven is wound around the downstream coil 83, which can be rotated by an additional motor or, in a preferred embodiment, by a belt 84 on the axis of the roller 80.
    Reference numbers used in the figures
    [0059]<tb> 1 <SEP> Strapping machine<Tb> 2 <September> Table<tb> 3 <SEP> Numeric control<Tb> 4 <September> Rest elbows<tb> 5A, 5B <SEP> Abrasive Belt Coils<tb> 6 <SEP> Path for abrasive belt or abrasive belt<tb> 7 <SEP> Supply tray<tb> 8 <SEP> Abrasive Belt Drive Device<tb> 9 <SEP> Piece to be strapped or circled piece<Tb> 10 <September> brooch<Tb> 11 <September> Housing<tb> 12 <SEP> Compressible element<tb> 13 <SEP> Centering piece<tb> 130 <SEP> Concave centering portion<Tb> 14A-C <September> Rollers<Tb> 140 <September> Chamfer<tb> 141C <SEP> Point of contact between roller 14C and workpiece<tb> 15 <SEP> Ejection hatch<tb> 150 <SEP> Suction opening<tb> 151 <SEP> Blowing mechanism<tb> 16 <SEP> Actuation buttons<tb> 80 <SEP> Motorized Roller<tb> 81 <SEP> Free roll on spring<tb> 82 <SEP> Upstream coil<tb> 83 <SEP> Downstream coil<Tb> 84 <September> Belt<tb> d <SEP> Abrasive Belt Scroll Direction<tb> t <SEP> Tangent of roller 14C at point of contact with workpiece<tb> y <SEP> Direction of movement of the centering piece
    权利要求:
    Claims (24)
    [1]
    Strapping machine (1) for decorating metal parts (9), comprising:an abrasive belt drive mechanism (8) for moving an abrasive belt (6) relative to the workpiece (9);a mechanism for rotating (10, 12) the workpiece to be circled relative to the abrasive belt;characterized byrollers (14A-C) arranged for lateral holding of the workpiece (9) during strapping.
    [2]
    2. Machine according to claim 1, wherein said rotation mechanism (10) comprises a pin (10) and a compressible element (12) intended to be rotated by said pin (10) and to support the piece to strapping (9) against the abrasive belt (6) during strapping.
    [3]
    3. Machine according to claim 1, wherein said rotation mechanism comprises a pin (10) and a compressible element (12) intended to be rotated by said pin and to press against the rollers (14A-C) during the strapping, so as to rotate the rollers.
    [4]
    4. Machine according to claim 3, wherein said compressible element (12) is arranged to press the workpiece (9) against the abrasive belt (6) during strapping.
    [5]
    5. Machine according to one of claims 1 to 4, comprising a movable centering piece (13) relative to the abrasive belt (6), said centering piece being arranged to center the piece to be circled (9) under the mechanism rotating (10, 12).
    [6]
    6. Machine according to claim 5, at least one of said roller (14A, 14B) being mounted under the centering piece (13).
    [7]
    7. Machine according to one of claims 1 to 6, comprising two of said rollers (14A) on one side of the workpiece (9) with respect to said abrasive belt (6), and a third of said roller (14C) on the other side of the workpiece to be circled with respect to said abrasive belt, the third roller (14C) being positioned with respect to said workpiece (9) so that the tangent (t) of this roller (14C ) at the point of contact (141C) with the piece to be strapped (9) is not parallel to the direction of travel (d) of the abrasive belt.
    [8]
    8. Machine according to one of claims 1 to 7, arranged so that the piece to be strapped (9) straddles the edge of the abrasive belt (6) during the strapping, so as to allow the evacuation dust resulting from abrasion from the side of the strip.
    [9]
    9. Machine according to claim 8, comprising a dust suction system (150) under the portion of the workpiece (9) protruding next to the abrasive belt (6).
    [10]
    10. Machine according to one of claims 1 to 9, comprising a ejection flap (15) pivoting, arranged to allow ejection of the rimmed parts (9) by the side of the abrasive belt (6).
    [11]
    11. Machine according to claim 10, the ejection flap (15) comprising a dust suction system (150).
    [12]
    12. Machine according to one of claims 10 or 11, comprising a mechanical removal mechanism (13) to push the circled parts in the door.
    [13]
    13. Machine according to claim 12, the evacuation mechanism including said centering piece (13).
    [14]
    14. Machine according to one of claims 10 to 13, comprising a blowing mechanism (151) to help the rimmed pieces (9) to fall into the ejection door (15).
    [15]
    15. Machine according to one of claims 1 to 14, comprising a supply tray (7) with strapping wheels (9) arranged to facilitate the approximate positioning of the wheels to be circled.
    [16]
    16. A method of strapping pieces of metal parts, comprising:driving in translation of an abrasive belt (6);positioning and holding the workpiece (9) by its periphery during strapping;rotating the workpiece (9) with respect to the abrasive belt (6).
    [17]
    17. The method of claim 16, comprising maintaining the support member (9) against the abrasive belt (6) by means of a compressible element (12) rotated.
    [18]
    18. The method of claim 16, the workpiece (9) being rotated by its periphery.
    [19]
    19. The method of claim 18, the piece to be strapped (9) being supported by a compressible element (12) against the abrasive belt (6) during strapping, said compressible element (12) driving in rotation rollers (14A-C). ) for rotating the workpiece (9).
    [20]
    20. Method according to one of claims 16 to 19, comprising a step of centering the workpiece (9) by means of a movable centering piece (13).
    [21]
    21. Method according to one of claims 16 to 20, the piece to be strapped (9) being positioned astride the edge of the abrasive belt (6) during strapping.
    [22]
    22. The method of claim 21, comprising a dust evacuation step under the portion of the piece (9) which projects next to the abrasive belt (6).
    [23]
    23. Method according to one of claims 16 to 22, comprising the opening of an ejection flap (15) for ejecting the rimmed piece (9) by the side of the abrasive belt (6).
    [24]
    24. The method as claimed in one of claims 16 to 23, comprising a step of manually supplying rim wheels (9) by means of a supply plate (7).
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    同族专利:
    公开号 | 公开日
    CH710037B1|2018-06-29|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE4009571A1|1990-03-24|1991-09-26|Thielenhaus Ernst Kg|Grinding machine for rolling bearing rings - has ring resting on three support rollers and driven by locating rollers at periphery|
    US5276999A|1990-06-09|1994-01-11|Bando Kiko Co., Ltd.|Machine for polishing surface of glass plate|
    CH696989A5|2006-03-24|2008-02-29|Piguet Frederic Sa|Time-piece e.g. dial, decorating method, involves machining part of flat surface of timepiece with help of cutting tool by relative translational and rotational movements of work head relative to tool along axis|
    法律状态:
    2017-06-30| PCOW| Change of address of patent owner(s)|Free format text: NEW ADDRESS: RUE DES FORGERONS 4, 2942 ALLE (CH) |
    2019-03-29| PL| Patent ceased|
    优先权:
    申请号 | 申请日 | 专利标题
    CH01309/14A|CH710037B1|2014-08-29|2014-08-29|Strapping machine and method for decorating metal parts|CH01309/14A| CH710037B1|2014-08-29|2014-08-29|Strapping machine and method for decorating metal parts|
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