• 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 workpiece carrier for the electrolytic treatment of workpieces of complex geometry comprises an armature (2) vertically supporting rotatably movable supports (3) adapted to carry the workpieces (6) to be treated, and a control member (8) of which actuation rotates the movable supports (3) sequentially on either side of a neutral initial position. Application to electroplating
    公开号:FR3037600A1
    申请号:FR1555540
    申请日:2015-06-17
    公开日:2016-12-23
    发明作者:Maxence Renaud
    申请人:Maxence Renaud；
    IPC主号:
    专利说明:

    [0001] TECHNICAL FIELD TO WHICH THE INVENTION RELATES The present invention relates generally to electrolytic or anodic oxidation surface treatment, in particular electroplating, of surfaces of metal parts or metallizable plastics (ABS, PA, PP, ABS). PC, ...) of complex geometry. Conventionally, the parts whose faces are intended to be coated by electrolytic treatment, in particular electroplating, are arranged in an electrolysis bath contained in a treatment tank by means of a workpiece constituting the cathode of the device. Typically, the pieces are placed in the tank in a fixed position opposite the anodes of the treatment device so that the surfaces to be treated of the pieces are as much as possible directly facing the anodes. In operation, the streamlines in the bath conventionally going from anodes to cathodes primarily reach the surfaces of the parts directly exposed to the anodes. This situation is acceptable for the treatment of parts of simple geometry where the surfaces to be treated parts are all sufficiently exposed to the current lines when the part is in a fixed initial position. On the other hand, in the case of pieces of complex geometry, that is to say which in the fixed initial position have surfaces that are totally or partially obscured with respect to the anodes, the current lines will only partially reach, or not at all those surfaces with little or no exposure to the anodes. It follows that the treatments, in particular the galvanic deposits on the surfaces, are different and not homogeneous. In particular, the thicknesses of the deposits will be different from one surface to another of the parts and the parts will not meet the specifications. The inventors have studied the impact of current lines on the surfaces of parts to be treated, of complex geometry, as a function of the orientation of the parts relative to the anodes of a treatment device. This study is schematically illustrated by FIGS. 1A to 1C. In FIG. 1A, the parts 6 to be treated are in an initial neutral position with respect to the anodes 2. In this case, the impact of the current lines 3 is certainly 80% on the surface A of the parts, but only 10%, 20% and 10% for surfaces B, C and D. 3037600 2 If parts 1 is rotated 45 ° clockwise or counterclockwise, As shown in FIGS. 1B and C, the impact of the current lines on the different surfaces is established as follows: Rotation 45 ° 45 ° direction of the hands of a 45 ° rotation counterclockwise direction Surface Impact% Surface Impact A 75 A 75 B 80 B 10 C 10 C 80 D 50 D 50 In general, the present invention therefore aims to solve the problem of standardization of electrolytic treatment or by anodic oxidation, in particular by electroplating, surfaces of parts of complex geometry and, more particularly, uniformity ion electroplating deposits. BACKGROUND ART Documents FR-2.832.429 and FR-2.714.079 describe workpiece carriers for electrolytic treatment or by anodic oxidation.
    [0002] In these documents, the objects to be treated are arranged on horizontal rods rotatable about their longitudinal axis. The rotation is carried out once the treatment is completed after removal of the workpiece-holding device from the treatment bath, and is intended to eliminate the excess of treatment bath that may remain in the parts.
    [0003] Document GB-1,428,856 describes a device in which the workpieces carried by horizontal bars are able to oscillate freely during the treatment in order to ensure agitation of the treatment bath. OBJECT OF THE INVENTION In order to overcome the above-mentioned disadvantage of the state of the art, the present invention proposes a process for electrolytic treatment or anodic oxidation, in particular electroplating, of surfaces of parts, of complex geometry. , ensuring optimal access to the surfaces of complex parts during treatment. More particularly, the subject of the present invention is such an electrolytic or anodic oxidation process which provides optimum exposure of the surfaces of complex parts to the streamlines during processing and, hence, treatment, e.g. electroplating as uniform as possible, surfaces of complex parts. The invention also relates to an electrolytic treatment device or anodic oxidation device designed for the implementation of the method. Finally, the invention relates to a workpiece capable of ensuring optimal exposure of complex parts surfaces to the current lines during electrolytic treatment or anodic oxidation, including electroplating.
    [0004] The above aims are achieved according to the invention by a process of electrolytic treatment or anodic oxidation, especially electroplating, which comprises the establishment in a so-called initial neutral position, by means of a removable piece holder constituting a first electrode in a treatment bath contained in a tank having a second electrode of polarity opposite the first electrode, of parts of complex geometry, characterized in that: a) the pieces of complex geometry are such that in a position initial neutral, surfaces of these pieces of complex geometry are little or not reached by the current lines established between the first and the second electrode during the implementation of the treatment process; and b) during the processing of the pieces of complex geometry, the parts are subjected to sequential rotations on either side of their neutral initial position by an angle of up to 90 °, in particular 45 °, of in order to increase the exposure to the current lines of the surfaces of the pieces of complex geometry that were initially little or not reached. According to the invention, the angles of rotation of the complex parts are chosen as a function of the treatment and the geometry of the parts, so as to optimally expose the surfaces initially not exposed to the current lines established during the treatment.
    [0005] These sequential rotation angles are generally between 5 and 90 ° on either side of the initial position fleure. During a treatment, the pieces of complex geometry are rotated sequentially at different angles on either side of their neutral initial position and are maintained in each of these different positions for a sufficient processing time to to obtain as uniform a treatment as possible of the surfaces of the parts, in particular an electrolytic deposit, for example by electroplating. Of course, the method of the invention can be implemented by means of a computer program designed according to the geometric complexity of the parts to be treated and the planned treatment. The invention also relates to a workpiece for the electrolytic treatment or anodic oxidation, in particular electroplating, complex geometry parts comprising: - a frame of electrically conductive material having horizontal upper and lower sides joined by two vertical lateral sides; - Rotating mobile supports designed to carry the parts to be treated; characterized in that: - the movable supports are held vertically between the upper and lower sides of the frame so as to be pivotable along a vertical pivot axis; the upper end of each of the movable supports comprises an element cooperating with a control member whose actuation sequentially rotates the movable supports, preferably at a maximum angle of 90 °, and typically up to an angle of at least 45 °, on both sides of a neutral initial position. The piece carrier according to the invention may also comprise the following characteristics taken separately or in any combination thereof: the upper side of the armature is constituted by an electrically conductive bar allowing the device to be held workpieces vertically in a treatment tank and removal from the treatment tank; the control member is integral with the upper horizontal side of the armature; the control member is a rack that is linearly movable in a reciprocating motion and the elements at the upper ends of the mobile supports are gears meshing with the rack; The control member is adapted to be removably connected to an actuator, for example an electric jack; the actuator is integral with the upper side of the armature; the movable supports are held vertically in rotation in the armature by means of bearings.
    [0006] In a preferred embodiment of the workpiece carrier of the invention, the workpieces are held back-to-back in pairs along the supports. The invention further relates to a device for electrolytic treatment or anodic oxidation, in particular electroplating, comprising: - at least one treatment tank having an open top surface 15 adapted to contain a treatment bath and in which is disposed vertically at minus a first electrode, usually an anode; a workpiece carrier as defined above constituting a second electrode of opposite polarity to the first electrode, generally a cathode, which can be arranged vertically in the vessel, so that parts carried by the workpiece carrier are in a initially neutral position vis-a-vis the first electrode, and - at least one actuator of the control member of the workpiece holder. In one embodiment of the invention, the treatment tank comprises, inside the tank, arranged vertically, a first electrode, typically an anode, a third electrode of the same polarity as the first electrode and spaced from this first electrode. , the workpiece holder being removably disposed between the first and the third electrode. Preferably, the first and the third electrode are anodes and the workpiece device constitutes a cathode; In one embodiment of the treatment device according to the invention, the actuator of the control member is integral with the treatment tank. The treatment device according to the invention may comprise several successive treatment tanks for the complete treatment of the parts, the parts to be treated being placed successively in the different tanks for their treatment by means of a single piece holder according to the invention. invention. In this case, one can provide on each tank an actuator connectable to the control member of the workpiece. Alternatively, the actuator of the control member may be integral with the workpiece holder and will be transported with the vat cell holder to the completion of the coin processing process. Alternatively, the control member comprises a control arm connectable to an external actuator, in particular fixed on a treatment tank.
    [0007] DETAILED DESCRIPTION OF AN EXEMPLARY EMBODIMENT The following description with reference to the accompanying drawings, given as non-limiting examples, will make it clear what the invention consists of and how it can be achieved. The remainder of the description refers to the appended figures which represent respectively: FIGS. 1A to 1C, schematic representations of the impact of the lines on the surfaces of a piece of complex geometry as a function of their orientation; - Figure 2, a perspective view of an embodiment of a workpiece holder 20 according to the invention in its neutral initial position; - Figures 2A and 2B, front and top views, respectively of the piece carrier of Figure 1; Figure 3 is a perspective view of the workpiece carrier of Figure 1 after 45 ° rotation in the clockwise direction relative to the neutral initial position; - Figures 3A and 3B, front and top views, respectively of the piece carrier of Figure 3; FIGS. 4A and 4B, front and top views, respectively, of the workpiece carrier of FIG. 1 after a rotation of 45.degree. Counterclockwise with respect to the neutral initial position; - Figure 5 is a schematic perspective view of the workpiece of Figure 1 set up in a treatment tank; - Figure 6, a top view of the workpiece carrier and the treatment tank of Figure 5, with the parts to be treated in their original neutral position by 3037600 7 compared to the anodes; - Figures 7 and 8, top views similar to Figure 6, after rotation of 45 ° parts to be treated respectively respectivemert on both sides, relative to the neutral initial position; 5 - Figures 9 and 10, schematic views, respectively from the front and in perspective of an embodiment of the workpiece carriers and a treatment tank according to the invention, the workpiece holder being out of the tank. Referring to Figures 2, 2A and 2B, there is shown in perspective, in front views and from above, an embodiment of a workpiece carrier 1 according to the invention.
    [0008] The workpiece carrier 1 comprises a generally rectangular frame 2 made of electroconductive material having an upper side 2a, a lower side 2b and two lateral sides 2c. Also known as candle holders 3, also of electroconductive material, arranged parallel to the lateral sides 2c of the frame 2, are held between the upper side 2a and the lower side 2b of the frame 2 so as to be able to rotate according to a vertical axis on either side of a neutral initial position as shown in FIG. 2. This rotary holding can be done by means of bearings 4, for example plain bearings, integral with the upper 2a and lower 2b the armature 2. Means 20 for attaching the parts 6, for example clips, clips or springs, are arranged along the supports. In the embodiment shown, the attachment means 5 of the parts are arranged along the supports 3 so as to maintain the parts 6 in opposite pairs. Of course, other arrangements of the fastening means 5, for example staggered, are possible depending on the geometry of the workpieces and treatments envisaged. The upper end of each of the rotary supports 3 is provided with a pinion 7 which meshes with a rack 8 secured to the upper side 2a of the armature 2. One end of the rack 8 is integral with a maneuvering arm 9 whose free end can be removably connected to the control rod 11 of a linear actuator 10 such as a cylinder. A horizontal translation of the rack 8, in one direction or the other, rotates the supports 3, and therefore the parts 6, on either side of the neutral initial position. Of course, the control of the rotation of the supports 3 and therefore 3037600 8 parts 6 could be achieved by other means such as a cam system or worm. The upper side 2a of the armature is a bar ensuring the maintenance of the armature 2 in a treatment tank and the supply of current in the rotary supports 3. As is known, the armature 2, the supports 3 and fastening means 5 of the parts are of electrically conductive material and together constitute an electrode, in particular the cathode of a device for electrolytic treatment or anodic oxidation, in particular electroplating, and means are provided, generally on the upper side 2a by connection to a power source. By way of illustration, FIGS. 3, 3A and 3B, respectively in perspective, front and top, respectively, after a rotation of the supports 3 by 45 ° in the direction of clockwise, and in FIGS. and 4B, from the front and from above, after a rotation in the opposite direction of 45 °, the positioning of the workpieces with respect to the neutral initial position of FIG. 2. The workpiece carrier 1 according to the invention is particularly designed for use in an electrolytic treatment or anodic oxidation device, in particular electroplating, and the implementation of the method of the invention. Referring to Figures 5 to 10, will now be described an embodiment of a treatment device according to the invention as well as the implementation of the method of the invention. Figure 5 shows the workpiece carrier 1 of the invention set up in a treatment vessel 20 of a device according to the invention. As shown in FIG. 5, the treatment tank 20 is of generally parallelepipedal shape. The vessel 20 comprises an open upper face 20a, a bottom 20b and two pairs of opposite side walls, a main pair 20c, 20d and a secondary pair 20e, 20f.
    [0009] An electrode set 21a, 21b, typically anodes, is disposed vertically along each of the opposite major sidewalls 20c, 20d and is, for example, in the form of vertical and parallel rectangular electroconductive strips. The workpiece carrier 1 is arranged and held vertically in the vessel between the sets of electrodes 21a, 21b, the ends of the upper side 2a of the armature 2 resting on the upper edges of the secondary side walls 20e, 20f, the supports 3 then being vertically arranged in front of the electrode sets 21a, 21b, in particular of each of the strips constituting the sets of electrodes. A linear actuator 10 is fixed to the upper edge of a secondary side wall 20e and removably connected by its control rod 11 to the operating arm 9 of the rack 8. Figures 9 and 10 are front views and in perspective of a treatment device according to the invention with the workpiece holder 1 outside the treatment tank 20 before or after a treatment. In this embodiment, the linear actuator 10 remains on the tank 20 after disengagement of the operating arm 9 of the rack 8. Obviously, the device according to the invention may comprise several successive tanks as described above for treatments different successive pieces 6 carried by the same carrier 1. If, in the embodiment described above of the device, there is provided an actuator 10 attached to each treatment tank, one can alternatively provide a single actuator attached to the bar upper 2a of the frame 2 of the workpiece holder 1, 20 this actuator then being transported from tank to tank at the same time as the workpiece holder. An implementation of the process of the invention will now be described in connection with Figures 5 to 10 and in the context of an electrolytic treatment. As shown in FIGS. 5 and 6, the workpiece carrier 1 described above, with the workpieces 6 of complex geometry to be treated arranged on the rotary supports 3, is placed vertically in a treatment tank 20 containing a bath of electrolyte, between the sets of anodes 21a and 21b, the upper bar 20c of the frame 2 resting on the opposite sides of the open upper surface 20a constituting the upper edges of the secondary side surfaces 20e, 20f of the tank 20 not provided anodes. The bar 2a is connected to a current source, for example by means of a conductive braid or contact ves (not shown). The rotary supports 3 are electrically connected to the bar 2a by means of conductive braids (not shown). In operation, the armature 2 and the parts 6 form a cathode facing the anode sets 21a and 21b. The rack 8 is connected via the operating arm 9 to the rod 11 of a linear actuator 10, for example a cylinder, fixed on the upper edge of the secondary lateral surface 20e of the tank 20.
    [0010] At this stage, the supports 3, and hence the workpieces 6, are in a neutral initial position in which the "a" surfaces of the parts 6 face directly the anodes 21a, 21b and are directly impacted by the lines. current L between the anodes and the cathode during the treatment. On the other hand, the surfaces "b" and "c" of the parts 6 which are not in front of the anodes 21a, 21b, are little or not impacted by the current lines L. During the treatment, the circuit is activated sequentially. linear actuator 10. In the embodiment shown, the linear actuator 10 is activated a first time in order to retract the rod 11 and thus translate to the right of the rack 8. This translation to the right of the rack 8 has the effect of pivoting the supports 3 in the direction of clockwise, here at an angle of 45 ° relative to the neutral initial position. Following this rotation of the supports 3, the exposure of the surfaces "b" of the parts 6 to the anodes is increased and the impact of the current lines on these surfaces 20 increases (Figure 7). The linear actuator 10 is then activated a second time to advance the rod 11 and thus translate to the left of the rack 8. This translation to the left of the rack 8 has the effect of pivoting the supports 3 in the counter-clockwise, here at an angle of 45 ° to the neutral initial position. Following this rotation of the supports 3, the exposure of the surfaces "c" to the anodes is increased and the impact of the current lines L on these surfaces c increases. Of course, depending on the treatment and the complexity of the geometry of the parts (FIG. 8), it is possible to use during the treatment several rotations 30 of an angle of between 0 degrees (neutral initial position) and 90 ° on either side. from the neutral initial position. Also, the holding time at each of the selected positions will depend on the processing and the geometric complexity of the parts. In the case of electrolytic deposition, the angles of rotation 3037600 11 and the holding time at the different angular positions will be selected so as to obtain the most homogeneous deposition possible and in particular of as equal thickness as possible. The sequence of rotations during a process can be automatically controlled by computer program. At the end of the treatment, the operating arm 9 is locked in the neutral position and is disconnected from the rod 11 of the actuator and the upper bar 2a is disconnected. The piece carrier 1, with the treated parts 6, is then removed from the tank 20, the actuator 10 remaining fixed on the tank 20.
    [0011] The piece carrier 1, together with the parts 6, can then be placed in another treatment chamber for further electrolytic treatment or other treatment, eg drying, baking, etc., or the parts 6 can be removed from the carrier. parts 1 and stored before shipment. 15
    权利要求:
    Claims (15)
    [0001]
    REVENDICATIONS1. A method of electrolytic surface treatment or anodic oxidation comprising placing in a neutral initial position by means of a removable workpiece carrier (1) constituting a first electrode in a treatment bath contained in a tank (20). ) having at least one second electrode (21a, 21b) of opposite polarity to the first electrode, parts (6) made of metal or metallizable plastic (ABS, PA, PP, ABS PC, ...) of complex geometry, characterized in that: a) the parts (6) of complex geometry are such that in a neutral initial position, surfaces of these parts (6) of complex geometry are little or not reached by the current lines established between the first and second electrodes during the implementation of the treatment method; and b) during the treatment of the parts (6) of complex geometry, the parts (6) are subjected to sequential rotations on either side of their neutral initial position (0 degrees) of an angle up to 90 °, so as to increase the exposure to the current lines of the surfaces of the parts that are hardly or not reached by these current lines in the neutral initial position.
    [0002]
    2. Method according to claim 1, characterized in that the angle of rotation of the parts (6) is 45 ° from the side and trough of the neutral initial position.
    [0003]
    3. Method according to claim 1 or 2, characterized in that the parts (6) to be treated are maintained in the different angular positions resulting from the sequential rotations for a given time depending on the processing and the geometric complexity of the parts (6) .
    [0004]
    4. Workpiece carriers (1) for the electrolytic or anodic oxidation treatment of workpieces (6) of complex geometry comprising: - an armature (2) of electrically conductive material having upper (2a) and lower ( 2b) joined by two lateral sides (2c, 2d) vertical; - rotatable supports (3) adapted to carry the parts (6) to be treated; characterized in that: - the movable supports (3) are held vertically between the upper (2a) and lower (2b) sides of the frame (2) so as to be pivotable 3037600 13 along a vertical pivot axis; and - the upper end of each of the movable supports (3) comprises an element (7) cooperating with a control member (8) whose actuation sequentially rotates the movable supports (3), on either side of an initial neutral position.
    [0005]
    5. Workpiece holder (1) according to claim 4, characterized in that the maximum angle of rotation is 90 °, and preferably at least 45 °.
    [0006]
    6. Workpiece holder (1) according to claim 4 or 5, characterized in that the control member (8) is integral with the upper side (2a) of the armature (2). 10
    [0007]
    7. Holders (1) according to any one of claims 4 to 6, characterized in that the upper side (2a) of the frame (2) consists of a bar for the placement and vertical maintenance of a workpiece holder (1) in a treatment tank (20) and the supply of current to the workpiece carrier (1).
    [0008]
    8. Workpiece holders (1) according to any one of claims 4 to 7, characterized in that the control member (8) is adapted to be detachably connected to an actuator (10).
    [0009]
    9. Workpiece carrier (1) according to any one of claims 4 to 8, characterized in that the control member (8) is a rack moving linearly in a reciprocating movement and the elements ( 7) at the upper ends of the movable supports (3) are pinions meshing with the rack (8).
    [0010]
    10. Workpiece holder (1) according to any one of claims 4 to 9, characterized in that the actuator (10) is integral with the workpiece carrier and transportable with it. 25
    [0011]
    11. Workpiece carrier according to any one of claims 4 to 10, characterized in that the control member (8) comprises a control arm (9) connectable to an external actuator, in particular fixed on a treatment tank.
    [0012]
    12. An electrolytic treatment or anodic oxidation device, characterized in that it comprises: - at least one treatment tank (20) having an open upper surface (20a) and able to contain a treatment bath; at least one first electrode (21a, 21b), preferably an anode, arranged vertically in the tank (20); - a workpiece carrier (1) according to any one of claims 4 to 11, constituting a second electrode of opposite polarity to the first electrode (21a, 21b), being able to be arranged vertically in the tank (20), in such a way that parts (6) of complex geometry carried by the workpiece carrier (1) are in an initially neutral position opposite the first electrode (21a, 21b); and - at least one actuator (10) of the control member (8) of the workpiece carrier (1).
    [0013]
    13. Device according to claim 12, characterized in that the first electrode consists of two sets of electrodes (21a, 21b), and the workpiece carrier (1) is placed between the two sets of electrodes.
    [0014]
    14. Device according to claim 12 or 13, characterized in that the actuator (10) is integral with the treatment tank (20) or carried on the door parts 1.
    [0015]
    15
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    同族专利:
    公开号 | 公开日
    EP3310946B1|2019-04-03|
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    MX2017016475A|2018-05-17|
    US10858752B2|2020-12-08|
    US20180163320A1|2018-06-14|
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    EP3310946A1|2018-04-25|
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    引用文献:
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    CN109119605A|2018-08-01|2019-01-01|马春国|A kind of lithium-containing transition metal nitride layer structure is every wet equipment and every wet method|
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    法律状态:
    2016-03-25| PLFP| Fee payment|Year of fee payment: 2 |
    2016-12-23| PLSC| Search report ready|Effective date: 20161223 |
    2017-04-07| PLFP| Fee payment|Year of fee payment: 3 |
    2018-04-09| PLFP| Fee payment|Year of fee payment: 4 |
    2020-06-16| PLFP| Fee payment|Year of fee payment: 6 |
    2021-05-07| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1555540A|FR3037600B1|2015-06-17|2015-06-17|METHOD FOR PROCESSING SURFACES OF COMPLEX GEOMETRY PARTS, PIECE DEVICE AND PROCESSING DEVICE|FR1555540A| FR3037600B1|2015-06-17|2015-06-17|METHOD FOR PROCESSING SURFACES OF COMPLEX GEOMETRY PARTS, PIECE DEVICE AND PROCESSING DEVICE|
    ES16736533T| ES2733299T3|2015-06-17|2016-06-17|Surface treatment procedure of complex geometry parts, part carrier device and treatment device|
    MX2017016475A| MX2017016475A|2015-06-17|2016-06-17|Method for treating surfaces of geometrically complex parts, part-carrying device and treatment device.|
    US15/736,365| US10858752B2|2015-06-17|2016-06-17|Method for treating surfaces of geometrically complex parts, part-carrying device and treatment device|
    PT16736533T| PT3310946T|2015-06-17|2016-06-17|Method for treating surfaces of geometrically complex parts, part-carrying device and treatment device|
    EP16736533.7A| EP3310946B1|2015-06-17|2016-06-17|Method for treating surfaces of geometrically complex parts, part-carrying device and treatment device|
    PCT/FR2016/051481| WO2016203173A1|2015-06-17|2016-06-17|Method for treating surfaces of geometrically complex parts, part-carrying device and treatment device|
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