• 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 method and a tool for calendering a barrel spring, from a lace (1) comprising a previously shaped shell, using a calender (20) comprising a first support means (10) exerting a force (F) on said lace (1) in a first contact zone (A) located between a second (B) and a third (G) contact zone that comprise a second (12) and a third (13) means of support, for winding, beyond said shell an accumulation zone with a curvature opposite to that of said shell, and where, during the advance of said lace (1), the position of said first contact zone (A ) away from said second (B) and third (C) contact areas, to vary the calender radius from a first minimum value to a second maximum value at a junction neck between said zone accumulation and said shell.
    公开号:CH712533A2
    申请号:CH00741/16
    申请日:2016-06-10
    公开日:2017-12-15
    发明作者:Vannod Jonas；Charbon Christian
    申请人:Nivarox-Far S A；
    IPC主号:
    专利说明:

    Description
    FIELD OF THE INVENTION [0001] The invention relates to a method for calendering the spiral portion of a watch-spring, from a drawn and pre-rolled lace, said lace comprising, successively, since a beginning blade, a shell shaped prior to said calender, with a curvature whose center is an outer side of said lace, said shell being followed by a neck having a zone of zero curvature and forming a zone of inflection, and said neck followed by an accumulation zone which is intended to be, during said calendering operation, calendered in a spiral according to a curvature whose center is on an inner side of said lace, opposite said outer side, said accumulation zone ending with an end of tape.
    The invention further relates to a calender for the implementation of this method.
    The invention further relates to a clock spring.
    The invention relates to the field of watch cylinder springs and their manufacture.
    BACKGROUND OF THE INVENTION [0005] The manufacture of clock springs is complex, and requires many steps, including a ringing step and / or a calendering step of a portion of a lace. at one end of which has been previously formed a shell, to form the leaf of the spring.
    This calendering operation is delicate, and requires perfect reproducibility. The handling of the spring is inconvenient at the exit of the calendering operation. SUMMARY OF THE INVENTION [0007] The purpose of the calendering is to guarantee the operation of the spring. Indeed, the entire leaf spring must provide the maximum torque when disarming the spring. That is, for each location on the blade, the spring surface is constrained to its elastic limit in the fully-armed state.
    The invention proposes to modify the calendering so as to avoid a conventional and expensive operation of ring setting the spring for the end of its development, for example for the execution of a treatment. And, more particularly, to produce a storable intermediate product that can be handled flat.
    The invention is to avoid an unnecessary burden of processing facilities with large tools, and to facilitate the handling of the springs, while eliminating the usual debugging.
    The calendering process consists in constraining the leaf spring between two rollers and a motorized rod to make a three-point bending of the blade, to plastically deform.
    The calendering is usually constant diameter, which involves a stack of turns, which can not resume their flattened shape once out of the plane. This problem is all the more important as the diameter of the spring is small.
    The invention proposes the implementation of a progressive or variable calendering technique, which produces a calender spring with a space, constant or variable depending on the settings between the turns. The goal is to facilitate handling in subsequent operations of the manufacturing process, and to remove the usual mattress. The invention makes it possible to guarantee a calender of smaller diameter at the calendered portion which corresponds to the beginning of the process, and to increase the diameter while approaching the shell.
    The principle of the invention also consists in constraining the blade between three points to exceed the elastic limit locally in the blade and thus form the calendered portion.
    For this purpose, the invention relates to a barrel spring calendering method according to claim 1.
    The invention also relates to a particular calender, according to claim 8, allowing this progressive calendering, and provided to reduce the lines due to the friction of the blade on metal parts, such as the axis and the rollers.
    The invention further relates to a clock spring according to claim 17.
    BRIEF DESCRIPTION OF THE DRAWINGS [0017] Other features and advantages of the invention will appear on reading the detailed description which follows, with reference to the appended drawings, in which: FIG. 1 represents, schematically, and in plan, a calender clock spring according to the invention; fig. 2 represents, schematically, and in plan view, a calender according to the invention with a lace introduced for its calendering; fig. 3 is similar to FIG. 2, bringing the lace into contact with three bearing and guiding means distributed on either side of this lace; fig. 4 shows, similarly to FIG. 3, pressurizing the support means and intermediate guide, on the lace; fig. 5 is similar to FIG. 4, another angle of threading of the lace in the shell; fig. 6 shows, schematically, the deformation of the contact triangle between the three support and guide means and the lace, during the advancement of the support means and intermediate guide with respect to the two extremes.
    DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention relates to a method of calendering the spiral portion of a clock spring 100 of watchmaking, starting from a lace 1 drawn and laminated beforehand.
    This lace 1, of thickness "e", comprises successively, since a blade start, a shell 2 shaped prior to calendering, with a curvature whose center is an outer side of the lace 1.
    This shell 2 is followed by a neck 3, of length LC, having a zone of zero curvature 4 and forming a zone of inflection.
    And this neck 3 is followed by an accumulation zone 5, which alone relates to the calendering operation according to the invention, and which is intended to be, during this calendering operation, calendered spirally according to a curvature whose center is an inner side of the lace 1, opposite the outer side.
    The accumulation zone 5 ends with a band end 6, and may advantageously, but not necessarily, have a short final length LF not spiral, which is the primer where we begin the calendering operation.
    According to the invention, the operation is a variable calendering operation, and more particularly a progressive calendering operation.
    According to the invention, a calender 20 is used which comprises at least a first support and guide means 10 arranged to exert a force F on the yaw 1 in a first intermediate contact zone A, which is located between a second B and a third C extreme contact zones that respectively comprise a second 12 and a third 13 support and guiding means, which comprises the calender 20, for winding the accumulation zone 5 with a curvature opposite to that of the shell 2.
    And, during the advance of the lace 1 in the calender 20, progressively modifies the position of the first contact area A away from the second B and third C contact areas, to vary the radius of calendering from a first minimum value R1 to a second maximum value R2 at the junction between the accumulation zone 5 and the neck 3, where the calendering operation is stopped.
    Fig. 3 3 illustrates the contacting of the lace 1 with the three bearing and guiding means 10, 12, 13, distributed on either side of this lace 1, at the beginning of the calendering, FIG. 4 illustrates the pressurization of the intermediate support and guide means 10, on the lace 1. And FIG. 6 represents the deformation of the contact triangle ABC between the three bearing and guiding means 10, 12, 13, and the lace 1, during the advancement of the support and intermediate guide means 10 with respect to the two extremes 12 and 13.
    In a particular implementation of the invention, the third support and guiding means 13 is maintained in a fixed position.
    In a particular implementation of the invention, it maintains the second support and guide means 12 in a fixed position.
    In a particular implementation of the invention, it moves the first support and guide means 10 relative to the second 12 and third 13 support and guide means which are fixed.
    In a particular embodiment of the invention, the first support and guiding means 10 and / or the second support and guiding means 12 are moved relative to the third support and guiding means. 13 which is in a fixed position.
    In a particular embodiment of the invention, a carriage 11 carrying the first support and guiding means 10 is displaced, with at least one degree of freedom, to exert this force F on the lace 1.
    And, more particularly, it prints to this carriage 11 a forward movement, including regular, allowing the progressive calendering according to the invention. Figs. 3 and 4 illustrate a particular non-limiting embodiment with a pivoting of the carriage 11, which allows to show a particular deformability of the triangle ABC supports.
    In a particular embodiment of the invention, there is interposed a deflector 15 on the path of the lace 1 after its exit from the calender zone to ensure its correct winding.
    The first support and guide means 10, the second support and guide means 12, and the third support and guide means 13 may each be in the form of a fixed shaft, an idler roller, or a motorized roller to ensure the advance of the lace 1 in the calender 20.
    If several of them are motorized, they may not be perfectly synchronous, so as to ensure for example a tension of the lace 1 in the calender zone between the second B and third C contact areas. In a variant, the second support and guiding means 12 and the third support and guiding means 13 are both motorized, and the first tends to impress the shoelace with a tangential velocity slightly greater than the second.
    The optional addition of a stamping operation allows to remove the calendering plate present at the end of the blade since the introduction of the calendering instead of setting ring heat treatment. This can prevent the camber of manual springs reported.
    The invention is illustrated in a nonlimiting particular case where the first support and guide means 10 is a rod, the second support and guide means 12 and the third support and guide means 13 are two pebbles. In sum, at a given moment, the contact surfaces between the rod 10, the two rollers 12, 13, and the lace 1, determine on the latter a profile close to an arc with a certain instantaneous curvature.
    For the spring 100 can be wound flat on the work plane, it is necessary that this instantaneous curvature varies approximately regularly during all the calendering of the spiral accumulation zone 5.
    And this instantaneous curvature increases, if possible regularly, from the end of the blade to the neck.
    For example, it is applied to the carriage 11 carrying the rod 10 a regularly increasing pressure depending on the advance of the lace 1, defined by the speed of rotation of at least one motorized roller, which may be the roller 14 of fig. 2, or the roller 12 and / or the roller 13, this rotational speed being also adjustable.
    To quantify the calender diameters, let us quote some examples of the various quantities: - internal or initial diameter 2R1: 3-15 mm - outer diameter or final 2R2: 12-40 mm - pitch P of the turn: 0-10 thickness blade length - blade length: 100-1000 mm.
    The invention further relates to a calender 20 for the implementation of this method, which comprises the various devices described above.
    This calender 20 comprises, on either side of a calendering zone arranged to receive a lace 1 provided beforehand with a shell 2 at one end, a first side at least a first means of support and guide 10 arranged to exert a force F on such a lace 1 in a first intermediate contact zone A, which is located between a second B and a third C extreme contact zones that respectively comprise a second 12 and a third 13 support and guiding means, which comprises the calender 20 on a second side opposite to the first side with respect to the calender zone. The exercise of this effort F on the lace 1 creates on it an accumulation zone 5 with a curvature opposite that of the shell 2.
    More particularly, the first support and guide means 10 is movable relative to the second 12 and third 13 support and guiding means.
    More particularly, the calender 20 comprises means for moving the first support and guiding means 10 to create such a variable force F.
    More particularly, these displacement means are arranged to print to a movable carriage 11 carrying this at least one first support and guide means 10, an advance movement, or a regular advance movement, for the realization of a progressive calendering. More particularly, the displacement means are arranged to print to a mobile carriage 11 at least one pivoting movement.
    More particularly, the calender 20 comprises a baffle 15 interposed on the path of the lace 1 after its exit from the calender zone to ensure correct winding. Naturally, this deflector 15 can be motorized, and movable in one or more degrees of freedom.
    More particularly still, the first support and guiding means 10 and / or the second support and guiding means 12 and / or the third support and guiding means 13 are made in the form of a motorized roller to ensure the advancement of the lace 1 in the calender zone. More particularly, at least two of these first support and guiding means 10, second support and guiding means 12, third support and guiding means 13, are motorized in a non-synchronous manner, so as to ensure lace tension 1 in the calender zone.
    权利要求:
    Claims (18)
    [1]
    More particularly, the calender 20 comprises at least one drive roller 14 motorized to ensure the advance of the lace 1 in the calender zone. Naturally the calender 20 may advantageously include control means and / or storage means, for controlling the various motorized organs and reproduce identically stored sequences for obtaining springs in a reproducible manner. These control means can, again, be combined with sensors for measuring the thickness of the spring downstream of the calendering zone, and / or measuring its concavity after calendering. The invention also relates to a clock spring 100 clock, whose turns are not contiguous, and are spaced from each other in the free state of the spring. More particularly, this spring 100 is a teflon spring, whose Teflon turns are spaced apart from each other in the free state of the spring. The invention allows the realization of such a spring. The progressive calendering technique according to the invention has several advantages: - the elimination or at least the reduction of the entanglement of the springs during handling, and during bulk operations such as baking, washing, tefloning, loading on automata, thanks to the separation of the turns of the springs, because the calendering process according to the invention is designed so that each spring remains in a flat configuration and does not relax during handling; - The reduction of the lines due to friction with the rollers and axes of the calender; - The elimination of contact between the turns, allowing washing, especially by solvents, and a Teflon more effective; - The reduction of the spring mattress resulting from the interweaving of the turns, common in the prior art. claims
    1. A method of calendering a barrel spring (100) from a lace (1) having a shell (2) shaped beforehand, characterized in that it implements a calender (20) comprising a first means of bearing and guiding (10) exerting a force (F) on said lace (1) in a first contact zone (A) located between a second (B) and a third (C) contact zone that comprises a second ( 12) and a third (13) support and guide means, for winding, beyond said shell (2), an accumulation zone (5) with a curvature opposite to that of said shell (2), and where during the advance of said lace (1), the position of said first contact zone (A) is progressively changed away from said second (B) and third (C) contact zones, to vary the calender radius from a first minimum value (R1) to a second maximum value (R2) at a neck (3) between said accumulation zone (5) and said shell (2).
    [2]
    2. A calendering method according to claim 1, characterized in that it stops said calendering operation when said second value (R2) maximum is reached.
    [3]
    3. Method according to claim 1 or 2, characterized in that said third support means (13) and guiding and / or said second (12) support and guide means in a fixed position are maintained.
    [4]
    4. Method according to claim 3, characterized in that moves said first support means and guide (10) relative to said second (12) and third (13) support and guide means which are fixed.
    [5]
    5. Method according to claim 1 or 2, characterized in that displacing said first support and guiding means (10) and / or said second (12) support and guide means relative to said third (13) ) support and guiding means which is in a fixed position.
    [6]
    6. Method according to one of claims 1 to 5, characterized in that moves, with at least one degree of freedom, a carriage (11) carrying said first support means and guide (10), to exercise said force (F) on said lace (1).
    [7]
    7. Method according to one of claims 1 to 6, characterized in that interposed a baffle (15) on the path of said lace (1) after its exit from the calender area to ensure its correct winding.
    [8]
    8. Calender (20) for carrying out this method, comprising on either side of a calendering zone arranged to receive a lace (1) provided beforehand with a shell (2) at one end, on a first side at least a first support and guiding means (10) arranged to exert a force (F) on a said lace (1) in a first intermediate contact zone (A), which is located between a second (B) and a third (C) extreme contact zones that respectively comprise a second (12) and a third (13) support and guiding means, which comprises said calender (20) on a second side, opposite the first side with respect to said calendering zone, the exercise of said force (F) on said lace (1) creating on it an accumulation zone (5) with a curvature opposite that of said shell (2).
    [9]
    9. Calender (20) according to claim 8, characterized in that said first bearing and guiding means (10) is movable relative to said second (12) and third (13) bearing and guiding means.
    [10]
    10. Calender (20) according to claim 8 or 9, characterized in that said calender (20) comprises means for moving said first support means and guide (10) to create a said variable force (F).
    [11]
    11. Calender (20) according to claim 10, characterized in that said moving means are arranged to print a movable carriage (11) carrying said at least one first support and guiding means (10), a movement of advance, or a regular advance movement, for the realization of a progressive calendering.
    [12]
    12. Calender (20) according to claim 11, characterized in that said moving means are arranged to print to a movable carriage (11) at least one pivoting movement.
    [13]
    13. Calender (20) according to one of claims 8 to 12, characterized in that said calender (20) comprises a baffle (15) interposed in the path of said lace (1) after exiting said calender zone to ensure its correct winding.
    [14]
    14. Calender (20) according to one of claims 8 to 13, characterized in that said first support and guide means (10) and / or said second support and guide means (12) and / or said third support and guiding means (13) is in the form of a motorized roller for advancing said lace (1) in said calender zone.
    [15]
    15. Calender (20) according to claim 14, characterized in that at least two of said first support and guiding means (10), second support and guiding means (12), third support means and guide (13), are motorized non-synchronously, so as to ensure a tension of said lace (1) in said calendering zone.
    [16]
    16. Calender (20) according to one of claims 8 to 15, characterized in that said calender (20) comprises at least one drive roller (14) motorized to ensure the advancement of said lace (1) in said area calendering.
    [17]
    17. Clock spring (100) of clockwork, characterized in that the turns are spaced apart from each other in the free state of said spring (100).
    [18]
    18. Clock spring (100) watchmaker according to claim 17, characterized in that said spring (100) is a teflonne spring whose Teflon turns are spaced apart from each other in the free state of said spring (100).
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    同族专利:
    公开号 | 公开日
    CH712533B1|2022-02-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP3575885A1|2018-06-01|2019-12-04|Nivarox-FAR S.A.|Barrel spring|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CH00741/16A|CH712533B1|2016-06-10|2016-06-10|Calender and process for calendering a watch barrel spring.|CH00741/16A| CH712533B1|2016-06-10|2016-06-10|Calender and process for calendering a watch barrel spring.|
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