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  • 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 for manufacturing a component (14) comprising a cavity consisting of two substrates (11, 12), a substrate (11) having an assembly face at least partially superimposable to another assembly face of the other substrate (12), removing material from a substrate at its assembly face by forming a recess (13) and assembling the two substrates (11, 12) by superposing assembly faces.
    公开号:CH713123A2
    申请号:CH01503/16
    申请日:2016-11-14
    公开日:2018-05-15
    发明作者:Turcotte Karine；Laforge Elias
    申请人:Swatch Group Res & Dev Ltd；
    IPC主号:
    专利说明:

    Description
    TECHNICAL AREA
    The present invention relates to a method of manufacturing a component, in particular a watch component in a substrate and more particularly to a method for digging a cavity inside a component.
    PRIOR ART
    It is already known the method of producing a component described in EP 2 607 971 which can be implemented on a transparent material for the laser. A first step consists of modifying the internal structure of the material by sweeping the area to be excavated with the focusing point of a laser having a very short pulse duration. The area of material thus scanned by the laser is made more sensitive to the action of a chemical agent. In a second step, the material is immersed in a bath containing this chemical agent. The modified zone is dissolved more quickly than the rest of the material that has not been modified, which makes it possible to create cavities inside the component.
    This type of method, however, has a number of disadvantages. It is reserved for transparent laser materials. The cavity to be machined must open out of the room. The unmodified area also dissolves, causing some of the material to be lost. The final dimension of the component is related to the dissolution time of the cavity so that it is difficult to modify the shape of the cavity without impacting the dimensions of the component. The loss of material and the shrinkage of the component are all the more important that the duration of the dissolution is large, that is to say that the volume to be dissolved is deep relative to the attack surface of the component where the dissolution.
    [0004] The shape of the cavity also impacts the dissolution time. Thus the dissolution will be slowed down if the section of the zone to be dissolved increases as a function of the distance to the etching surface of the chemical agent. A cavity 13 in FIGS. 4 and 5, in which a fine pipe opens into a reservoir, will be longer to dissolve a cavity of the same depth and the same volume but of constant section. In addition, the chemical agents used for dissolution such as hydrofluoric acid are highly toxic and their use requires the implementation of expensive safety procedures and a cleaning step to remove acid residues.
    SUMMARY OF THE INVENTION
    The present invention aims to overcome the disadvantages of the aforementioned prior art by proposing a new method for producing a component having a cavity which improves the process of the prior art and which offers new aesthetic and technical possibilities.
    For this purpose, the invention relates to a method for manufacturing a component comprising a cavity which consists in providing two substrates, a substrate having an assembly face at least partially superimposable on another assembly face. the other substrate, to remove the material of a substrate at its assembly face forming a recess and to assemble the two substrates by superimposing the assembly faces.
    Such a process makes it possible to easily create cavities of complex shape inside a component. Advantageously, the component can be formed from a wide variety of substrates that do not have the need to be transparent for laser machining, for example. The method of the invention also offers a great freedom regarding the shape of the cavity. This may, for example for aesthetic purposes, be completely closed and not lead to the outside of the component. Machining techniques that can be used to dig the cavity are simpler and less expensive to implement and also allow better accuracy compared to the dissolving operation of the prior art. The invention also improves the process of the prior art by reducing the duration of the dissolution step.
    The invention also relates to a method of manufacturing a component comprising a cavity and which consists in providing two substrates, a substrate having an assembly face having a recess and being at least partially superimposable on another face. assembly of the other substrate, and to assemble the two substrates by superimposing the assembly faces of the two substrates.
    According to an advantageous embodiment, the manufacturing method further comprises a step of polishing the assembly faces before the assembly step.
    According to another advantageous embodiment of the manufacturing process, the two substrates are assembled by gluing.
    According to another advantageous embodiment of the manufacturing process, the two substrates are transparent.
    According to another advantageous embodiment of the manufacturing process, the two substrates are made of materials selected from the group consisting of transparent ceramics, corundum, glass, diamond and quartz.
    According to another advantageous embodiment of the manufacturing process, the substrates are assembled by a transparent glue whose glue joint is invisible.
    According to another advantageous embodiment of the manufacturing process, the removal of material is carried out by a chemical etching.
    According to another advantageous embodiment of the manufacturing process, the removal of material is performed by a laser etching.
    According to another advantageous embodiment of the manufacturing method, the removal of material is performed by machining.
    According to another advantageous embodiment of the manufacturing method, the assembly face is a cylindrical surface.
    According to another advantageous embodiment of the manufacturing method, the assembly face is a surface of revolution.
    According to another advantageous embodiment of the manufacturing method, the assembly face is a flat surface.
    According to another advantageous embodiment of the manufacturing method, the component is a watch component.
    According to another advantageous embodiment of the manufacturing method, the component is a pallet.
    According to another advantageous embodiment of the manufacturing method, the component is a bearing.
    According to another advantageous embodiment of the manufacturing process, the component is a platen.
    According to another advantageous embodiment of the manufacturing method, the component is a watch crystal.
    According to another advantageous embodiment of the manufacturing process, the cavity formed in the component is a lubrication tank.
    According to another advantageous embodiment of the manufacturing process, the recesses open exclusively on the assembly faces.
    According to another advantageous embodiment of the manufacturing process, it is possible to apply a surface treatment in the recess before assembling the two substrates.
    The invention also relates to a watch component comprising a cavity, the component being composed of two parts joined together and delimiting between them a joint surface and the cavity extending along the joint surface.
    Advantageously, the two parts are made of a transparent material.
    Advantageously, the two parts are assembled by a transparent glue whose glue joint is invisible.
    Other features and advantages of the invention will appear on reading the description of exemplary embodiments, given by way of non-limiting illustration, with reference to the accompanying drawings, in which:
    BRIEF DESCRIPTION OF THE FIGURES
    FIG. 1 shows a perspective view of a half-pallet intended to be assembled with another symmetrical half-pallet not shown, FIGS. 2 and 3 show views of a pallet obtained after assembly of the part of FIG. 1 and the other half-pallet according to the manufacturing method of the invention, FIG. 4 is a sectional view of a bearing obtained by the manufacturing method of the invention, FIG. 5 is a top view of the lower part of the bearing, FIG. 6 shows a sectional view of a second bearing obtained by the manufacturing method of the invention, FIG. 7 shows a top view of the lower part of this second bearing.
    DETAILED DESCRIPTION
    Figs. 1 to 3 illustrate a first component obtained by the manufacturing method of the invention. This is a watch component, in this case a pallet 1 intended to be mounted on an anchor to cooperate with an escape wheel. The pallet 1 is composed of two half-pallets 2,3 visible in the sectional view of FIG. 3. To reduce energy losses due to friction and slow wear of the parts in contact, it is advantageous to provide in the pallet 1, a cavity 4 in which a lubricant is maintained by capillarity. This cavity 4 is for example in the form of a conical channel opening on one side on the rest plane 5 and on the other on the leakage plane 6.
    The present invention provides a manufacturing method for producing a component such as the pallet 1 with its cavity 4. To fix ideas, the dimensions of the cavity 4 are typically for such an application of a few tens of microns wide by example 50 micrometers and the same order of magnitude for the depth, for example 30 micrometers.
    A first step of the manufacturing process of a pallet 1 is to have two substrates 11,12 in which are formed two half-pallets 2, 3. The substrates 11,12 can be made of any kind of materials suitable for pallet manufacture. The substrate 11 has an assembly face 7 which is at least partially superimposable on an assembly face 8 of the other substrate 12. The assembly face 7 of the half-pallet 2 is visible in FIG. 1. The assembly face 8 of the other half-pallet 3 is symmetrical and superimposable to the assembly face 7. The assembly faces 7, 8 are flat surfaces.
    A second step of the manufacturing process consists of removing the material of a substrate 11,12 at its assembly face 7, 8. It is possible to remove the material of one or the other substrates 11,12 or both, symmetrically or not. A recess channel 13 of shape, for example conical, is thus obtained, as can be seen in FIG. 1. The removal of material may be carried out by any suitable means such as CNC machining, laser engraving, chemical etching etc.
    A third step of the manufacturing process consists of assembling the two substrates 11, 12 by superimposing their assembly face 7, 8 and holding them against each other everywhere appropriate means, for example by gluing, screwing, brazing or clamping. In the case of an at least partially transparent material, the assembly can be made invisible by using a transparent glue or a transparent gluing process. We know the commercial reference of such a method, "Advancedthinfilms / CADB (Chemically Assisted Direct Bonding) -Epoxy-free®", which forms an invisible joint between the two substrates assembled and has very low values of dispersion and d optical absorption. Thus, although it is made in two parts, the final appearance of the component is not different from that of a one-piece piece obtained by the manufacturing processes of the prior art.
    Figs. 4 and 5 show a bearing 14 of a timepiece obtained by the manufacturing method of the invention. The bearing 14 is composed of a substrate 11 forming the upper part of the bearing 14 and a substrate 12 forming the lower part. The bearing 14 has a bore 15 extending in the upper part and ending with a seat 16 of conical shape in the lower part. The recesses 13 were formed exclusively in the substrate 12 of the lower part before the assembly of the two substrates. The upper portion has a flange 17 being lodged against a shoulder 18 of the lower part.
    In a general manner, the manufacturing method according to the invention makes it possible to use a wide variety of opaque or transparent materials, such as spinel, silicon, silicon carbide, metals, ceramics, glass, quartz, diamond, etc. The method of the invention is especially adapted to the manufacture of microtechnical components and in particular to watch components such as anchor pallets, bearings, plates, dials, windows, pushers or crowns, or bridges . In an original way, the two substrates 11, 12 assembled for the manufacture of the bearing 14 are not made of the same material. The manufacturing method according to the invention therefore makes it possible to manufacture components having different optical, mechanical and / or tribological properties depending on the different substrates forming the component.
    In an original way, the faces of assemblies of the two substrates 11,12 of the bearing 14 are not necessarily flat surfaces. The assembly faces are composed of a central disk, a peripheral annular portion and an intermediate cylindrical portion, perpendicular to the first two and connecting them. The assembly faces could also be cylindrical surfaces or surfaces of revolution.
    Thus the assembly faces can be flat or have more complex surface geometries. In the case of a bonding assembly, a complex geometry makes it possible to increase the contact surface and the cohesive force. A non-planar surface has the other property of blocking certain degrees of freedom of movement between the two substrates and thus consolidate the assembly. These configurations make it possible to prevent the substrates from sliding relative to one another in the case of a clamping assembly or when shearing forces are supported by the bonding. In the example shown in figs. 4 and 5, the vertical cylindrical portions of the assembly faces allow to lock in translation the two parts of the bearing relative to each other in the directions perpendicular to the axis of rotation of the bearing.
    The shape of the faces of assemblies can also be studied to facilitate the assembly of the substrates by positioning the two assembly faces relative to each other. In the embodiment shown, the complementary shapes of the connector 17 and the shoulder 18 make it possible to align the lower and upper parts.
    An optional step of the method is to polish the assembly faces 7,8. In the case of 11.12 transparent substrates, an optical quality polishing makes it possible to make the interface between the two parts of the component invisible. This polishing step may be carried out indifferently before or after the step of removing the material forming the recess 13. The polishing may be carried out by a specific tool or obtained by a relative displacement of the substrates 11, 12 and
    权利要求:
    Claims (23)
    [1]
    friction of the assembly faces 7, 8 against each other in the presence of an abrasive. It is thus possible to produce transparent components by assembling with a transparent adhesive two substrates made of transparent materials selected from the group consisting of transparent ceramics, corundum, glass, diamond and quartz. An additional step, also optional, is to apply a surface treatment at the recess 13 for functional or aesthetic reasons, in the case where the component is transparent or translucent. It is thus possible to give a particular effect to a transparent or translucent component whose cavity may for example be colored, metallized, sandblasted or provided with a particular surface state. In the embodiment shown, the cavity is intended to receive a lubricant. Appropriate surface treatment of the recess 13 makes it possible to give the cavity 4 a particular surface state corresponding to the desired capillary adhesion properties. The method of the invention also covers the manufacture of a component from a number of substrates greater than two. This configuration can be interesting in the case where it is desired to obtain a cavity extending in several non-coplanar directions, particularly if it is desired that the faces of assemblies be flat. The embodiment illustrated auxfig. 6 and 7 has a bearing 20 comprising a lubrication channel 21 positioned in the axis of the bearing 20 and connected to four perpendicular supply ducts 22 whose ends open into a reservoir 23 of toric shape. The bearing is composed of three substrates 10, 11, 12 assembled together and arranged in such a way that the cavities 4 of the bearing extend along the joint planes separating the different substrates. The two substrates 11, 12 of the upper part of the bearing are assembled in a first step and the assembly they form is assembled with the lower part of the bearing. With this manufacturing method, it is possible to obtain a cavity 4 of complex shape extending in different directions by performing only simple machining operations on the surface of the different assembly faces. According to an alternative embodiment, the step of removing the material from a substrate forming the recess may precede the step consisting in providing two substrates. This can be the case when a substrate is itself a component obtained by the method of the invention, as has been seen for the upper part of the bearing 20 shown in FIG. 6. The recesses for forming the supply ducts 22 and the reservoir 23 could be machined before assembling the substrates 11 and 12 and thus before the creation of the upper part itself. The step of removing the material may also be totally absent from the method when a substrate already comprises, as soon as it is created, a recess at its assembly face. This is particularly the case when a substrate is a molded part and that the recess is obtained directly at the time of molding. It is necessary to understand the word recess in the broad sense as being a zone devoid of material with reference to the theoretical surface defined by the assembly face of the other substrate or by the joint plane of the two substrates when the other substrate is also hollowed out. Advantageously, the manufacturing method of the invention is particularly suitable for implementing the chemical etching process of the prior art. Since all the dissolving material is in close proximity to the assembly faces of the substrates, the material dissolving operation is greatly accelerated. As a result, the material losses and the dimensional variations of the bearing are limited during the dissolution step. According to another advantageous and original aspect of the invention, it is possible to manufacture a component comprising a completely closed cavity. It suffices for this that the recesses forming the cavity open exclusively on the assembly face where they are formed. This allows for multiple aesthetic ornaments or markings within an at least partially transparent component. The internal surfaces may for example be colored, etched or polished, the substrate may be a polarizing filter. The cavity can also enclose an object or a liquid. The invention also relates to a timepiece component consisting of two parts joined to each other contiguously by any means of assembly, in particular by gluing. The component further comprises a cavity extending along the joint surface delimited by the two parts, such that at least one face of each portion is a wall of the cavity. According to an alternative embodiment of the watch component, the two parts are made of a transparent material that can be selected from the group consisting of transparent ceramics, corundum, glass, diamond and quartz. According to another variant, the assembly is performed by an adhesive whose glue joint is invisible so that the component has the appearance of a monobloc component. According to the watch component and its application the dimensions of the cavities produced by the method of the invention may have widths and depths typically ranging from a few microns, typically 10 micrometers to 1 ms. It is obvious that one skilled in the art can make many variations to the embodiments presented without departing from the scope of the invention defined by the claims. claims
    1. A method of manufacturing a timepiece component (1,14,20) comprising a cavity (4), characterized in that it comprises the following steps: - Having two substrates (11,12), a substrate ( 11) having an assembly face (7) at least partially superimposed on another assembly face (8) of the other substrate (12), - removing material from a substrate (11, 12) at the of its assembly face (7, 8) forming a recess (13, 21, 22, 23), -Assembling the two substrates (11, 12) by superimposing the assembly faces (7, 8) of the two substrates .
    [2]
    2. Manufacturing process according to the preceding claim characterized in that the removal of material is carried out by chemical etching.
    [3]
    3. The manufacturing method according to claim 1 characterized in that the removal of material is performed by a laser etching.
    [4]
    4. Manufacturing process according to claim 1 characterized in that the removal of material is performed by machining.
    [5]
    5. A method of manufacturing a watch component comprising a cavity, characterized in that it comprises the following steps: - Have two substrates, a substrate having an assembly face having a recess and being at least partially superimposable to another assembly face of the other substrate, - Assemble the two substrates by superimposing the assembly faces of the two substrates.
    [6]
    6. Manufacturing method according to one of the preceding claims characterized in that it further comprises the step of polishing the assembly faces (7, 8) before the assembly step.
    [7]
    7. Manufacturing process according to the preceding claim characterized in that the step of polishing the assembly faces (7, 8) is obtained by a relative displacement of the substrates (11, 12) and friction of the assembly faces (7). , 8) against each other.
    [8]
    8. Manufacturing process according to one of the preceding claims characterized in that the substrates (11, 12) are assembled by gluing.
    [9]
    9. Manufacturing process according to one of the preceding claims characterized in that the substrates are transparent.
    [10]
    10. The manufacturing method according to the preceding claim characterized in that the substrates are made of materials selected from the group consisting of transparent ceramics, corundum, glass, diamond and quartz.
    [11]
    11. The manufacturing method according to one of claims 9 or 10 characterized in that the substrates are assembled by a transparent adhesive whose glue joint is invisible.
    [12]
    12. The manufacturing method according to one of the preceding claims characterized in that the substrates are made of different materials.
    [13]
    13. Manufacturing process according to one of the preceding claims characterized in that the assembly face is a flat surface.
    [14]
    14. The manufacturing method according to one of the preceding claims characterized in that the assembly face is a cylindrical surface.
    [15]
    15. Manufacturing method according to one of the preceding claims characterized in that the assembly face is a surface of revolution.
    [16]
    16. The manufacturing method according to one of the preceding claims characterized in that the component is an anchor pallet, a bearing, a plate, an ice, a pusher, a crown, a dial or a bridge.
    [17]
    17. The manufacturing method according to one of the preceding claims characterized in that the cavity formed in the component is a lubrication reservoir.
    [18]
    18. The manufacturing method according to one of the preceding claims characterized in that the recesses forming the cavity open exclusively on the assembly face where they are formed.
    [19]
    19. Manufacturing method according to one of the preceding claims characterized in that it further comprises a surface treatment step of the recess before the assembly step.
    [20]
    20. Watchmaking component comprising a cavity, characterized in that the component is composed of two parts joined together and delimiting between them a joint surface and in that the cavity extends along the joint surface.
    [21]
    21. Horological component according to the preceding claim characterized in that the two parts are made of a transparent material.
    [22]
    22. Horological component according to claim 21 characterized in that the two parts are assembled by a transparent glue whose glue joint is invisible.
    [23]
    23. Horological component according to one of claims 20 to 22, characterized in that it forms an anchor pallet, a bearing, an ice, a pusher, a crown, a dial, a plate or a bridge.
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    同族专利:
    公开号 | 公开日
    CH713123B1|2021-03-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CH01503/16A|CH713123B1|2016-11-14|2016-11-14|A method of manufacturing a watch component and a watch component obtained by such processes.|CH01503/16A| CH713123B1|2016-11-14|2016-11-14|A method of manufacturing a watch component and a watch component obtained by such processes.|
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