Hanging fixture

Abstract

The present invention relates to a hanger for clamping a workpiece to realize electrolytic treatment of the workpiece, thereby improving the uniformity of the electrolytic treatment and improving the mechanical properties of the workpiece. The hanger comprises a fixing device, a rotating device, a driving device and a workpiece clamping device, wherein the rotating device is rotatably connected to the fixing device around a rotation axis, the driving device is connected to the rotating device to drive the rotating device to rotate, the workpiece clamping device is connected to the rotating device and is used to revolve around the rotation axis of the rotating device, the workpiece clamping device comprises a connecting portion and a clamping portion, the connecting portion is connected to the rotating device, the clamping portion is connected to the connecting portion and is used to load the workpiece, and the connecting portion is configured to be rotatable and / or retractable in the direction of the rotation axis.

Description

Technical Field

[0001] The invention relates to the technical field of electrolytic treatment, in particular to a hanger. Background Art

[0002] Electroplating is a process that uses electrolysis to attach a layer of metal film to the surface of metal or other materials, thereby preventing metal oxidation, improving wear resistance, conductivity, reflectivity, corrosion resistance and enhancing aesthetics. Electroplating hangers are often used in the electroplating process. During electroplating, the plated metal is at the anode, the product to be plated is at the cathode, and the solution containing the plated metal cation is used as the electroplating solution. After the direct current power supply is turned on, the metal at the anode will oxidize (lose electrons), and the positive ions in the solution will be reduced (gain electrons) to atoms at the cathode and accumulate on the surface of the cathode. In theory, the uneven distribution of electroplating current is absolute, because the distribution of power lines is affected by factors such as product shape, anode shape, and distance from the anode. In addition, during the electroplating process, bubbles are easily generated in the electroplating solution. Electroplating bubbles will seriously affect the product's anti-rust performance, cleaning performance, and extreme pressure performance. Bubbles will increase gas-liquid contact, promote oxidation, and cause product degradation and deterioration. And if bubbles are adsorbed on the surface of the workpiece, it can cause uneven coating of the product after electroplating and reduce the mechanical properties of the product. Therefore, uneven distribution of electroplating current and electroplating bubbles will lead to uneven coating, reducing the mechanical properties of the product. In addition, similar problems also occur in electrolytic chemical polishing. And the existing technology does not solve these problems well. Summary of the invention

[0003] In view of the problems existing in the prior art, the object of the present invention is to provide a hanger, which can achieve the purpose of uniform electroplating or polishing of the workpiece surface through multi-directional rotation and / or extension of the hanger.

[0004] In order to achieve the above object, the present invention provides a hanger, comprising:

[0005] Fixing devices for connection with external mechanisms;

[0006] A rotating device, the rotating device is rotatably connected to the fixing device around a rotation axis;

[0007] a workpiece clamping device for clamping a workpiece, and,

[0008] A driving device connected to the rotating device to drive the rotating device to rotate;

[0009] The workpiece clamping device is connected to the rotating device and is configured to revolve around the rotation axis of the rotating device;

[0010] The workpiece clamping device comprises a connecting portion and a clamping portion; the connecting portion is connected to the rotating device; the clamping portion is connected to the connecting portion and is used to load the workpiece; the connecting portion is configured to be rotatable and / or retractable in the direction of the rotation axis.

[0011] Optionally, the connecting part includes a fixed part, a telescopic part and a rotating part; the fixed part is connected to the rotating device; the telescopic part is connected to the fixed part and can be telescoped in the direction of the rotation axis; the rotating part is connected to the telescopic part and can rotate in multiple directions.

[0012] Optionally, the connecting part includes a fixed part, a rotating part and a telescopic part; the fixed part is connected to the rotating device; the rotating part is connected to the fixed part and can rotate in multiple directions; the telescopic part is connected to the rotating part and can be telescopic in the direction of its own axis.

[0013] Optionally, the telescopic portion includes a connecting rod structure or an elastic structure.

[0014] Optionally, the elastic structure comprises a spring, one end of the spring is connected to the fixed part, and the other end of the spring is connected to the rotating part.

[0015] Optionally, the fixing portion includes a shell, the telescopic portion is arranged inside the shell, and the rotating portion is arranged outside the shell.

[0016] Optionally, the rotating part includes a universal joint.

[0017] Optionally, the rotating device includes a screw and a cross bar, the driving device includes a slider, the slider is drivingly connected to the screw, the slider is used to move relative to the screw to drive the screw to rotate, the cross bar is arranged on the screw and cross-arranged with the screw, and the workpiece clamping device is connected to the cross bar.

[0018] Optionally, the driving device further comprises a power source, wherein the power source is connected to the slider to drive the slider to move relative to the screw rod.

[0019] Optionally, the power source is a cylinder, a linear motor or a connecting rod mechanism.

[0020] Optionally, the hanger includes a plurality of the workpiece clamping devices, and the plurality of the workpiece clamping devices are arranged at intervals in the same direction perpendicular to the rotation axis of the rotating device.

[0021] Optionally, the fixing device comprises a hook, and the hook is rotatably connected to the rotating device via a bearing.

[0022] Optionally, the clamping portion includes an elastic clip.

[0023] According to the technical solution provided by the present invention, the driving device drives the rotating device to rotate and at the same time drives the workpiece clamping device to revolve about the rotating device in the electrolytic cell, which can form a turbulence in the electrolytic cell and improve the uniformity of the distribution of metal ions in the electrolytic cell, so that the workpiece on the workpiece clamping device can be uniformly electroplated or electrochemically polished, thereby improving the uniformity of the electroplating or electrochemical polishing of the workpiece.

[0024] According to the technical solution provided by the present invention, through the telescopic ability of the connecting part on the workpiece clamping device, during electroplating or electrochemical polishing, the weight of the workpiece and the fluid resistance of the electrolytic solution are utilized to make the connecting part telescope up and down to make the workpiece swing up and down, and / or, through the multi-directional rotation of the connecting part on the workpiece clamping device, the surface of the workpiece is fully contacted with the electrolytic solution, and the workpiece is swing left and right through the rotation of the connecting part. While the workpiece revolves, the up and down swinging and / or rotation prevents the adsorption of bubbles and impurities on the surface of the workpiece, thereby improving the quality of electroplating or electrochemical polishing.

[0025] According to the technical solution provided by the present invention, the workpiece is clamped by the telescopic part and the multi-directional rotation of the rotating part on the workpiece clamping device, so that the workpiece can not only revolve but also swing up and down and left and right during electroplating or electrochemical polishing, thereby further improving the uniformity of electroplating or electrochemical polishing and improving the quality of electroplating or electrochemical polishing.

[0026] According to the technical solution provided by the present invention, the expansion and contraction is achieved by the elastic structure of the expansion and contraction part on the workpiece clamping device, the structure is simple, and the shaking effect is better. In particular, the elastic structure is a spring, and the spring is preferably arranged in the housing to prevent the spring from being affected by the electrolytic solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to better understand the present invention and do not constitute an improper limitation of the present invention.

[0028] Figure 1 It is a front view of a hanger in a preferred embodiment of the present invention;

[0029] Figure 2 is a three-dimensional diagram of a hanger in a preferred embodiment of the present invention;

[0030] Figure 3 It is a stereoscopic view of a workpiece clamping device in a preferred embodiment of the present invention.

[0031] Description of reference numerals:

[0032] 1-hook; 2-bearing; 3-screw; 4-slider; 5-cylinder; 6-workpiece clamping device; 7-clamping part; 71-elastic clamp; 8-connecting part; 81-fixing part; 82-telescopic part; 83-rotating part; 831-universal joint; 9-cross bar. DETAILED DESCRIPTION

[0033] In order to make the purpose, advantages and features of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings. It should be noted that the accompanying drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0034] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0035] The present invention provides a hanger for loading workpieces in an electrolytic process, wherein the electrolytic process is mainly electroplating or electrochemical polishing. The hanger of the present invention comprises a fixing device, a rotating device, a workpiece clamping device and a driving device. The fixing device is used to connect with an external mechanism, and the external mechanism is a component that can be installed with the hanger in the electrolytic process. The present invention does not limit the structure of the external mechanism. The rotating device is rotatably connected to the fixing device around an axis of rotation, which means that the rotating device can rotate around the axis of rotation relative to the fixing device, rather than that both the rotating device and the fixing device rotate around the axis of rotation. The workpiece clamping device is used to clamp the workpiece, and there is no requirement for the type of the workpiece. Since the hanger of the present invention can be used for electroplating or electrochemical polishing, the workpiece can be an electroplated part or an electrochemically polished part.

[0036] In addition, the driving device is connected to the rotating device to drive the rotating device to rotate. Here, it should be understood that the driving device can be electric, pneumatic or manual. And the workpiece clamping device is connected to the rotating device and is configured to revolve around the rotation axis of the rotating device, so that the workpiece can also revolve. In addition, the workpiece clamping device includes a connecting portion and a clamping portion; the connecting portion is connected to the rotating device; the clamping portion is connected to the connecting portion and is used to load the workpiece; the connecting portion is configured to be able to rotate and / or be able to retract in the direction of the rotation axis. Preferably, the connecting portion can rotate in multiple directions, especially 360° rotation, for example, rotation around the Z axis can achieve 360° rotation, deflection around the X axis, and deflection around the Y axis, wherein the Z axis is parallel to the rotation axis of the rotating device.

[0037] The hanger is configured in this way, so that the driving device drives the rotating device to rotate and drives the workpiece clamping device to revolve in the electrolytic cell about the rotating device. The revolving facilitates the formation of turbulence in the electrolytic cell, improves the uniformity of the distribution of metal ions in the electrolytic cell, and enables the workpiece on the workpiece clamping device to be uniformly electroplated or electrochemically polished, thereby improving the uniformity of the electroplating or electrochemical polishing of the workpiece. In particular, through the telescopic movement of the connecting portion on the workpiece clamping device, during electroplating or electrochemical polishing, the weight of the workpiece and the fluid resistance of the electrolytic solution are conveniently utilized to make the connecting portion telescope up and down and make the workpiece shake up and down. And / or, through the rotation of the connecting portion on the workpiece clamping device, the surface of the workpiece is fully contacted with the electrolytic solution, and the workpiece is shaken left and right through the rotation of the connecting portion. While the workpiece is revolving, due to the existence of up and down shaking and / or rotation, especially multi-directional rotation and up and down shaking, bubbles and impurities are avoided from being adsorbed on the surface of the workpiece, thereby improving the quality of electroplating or electrochemical polishing.

[0038] The structure of the hanger of the present invention is further described below in conjunction with the accompanying drawings and preferred embodiments.

[0039] Figure 1 is a front view of a hanger in a preferred embodiment of the present invention, Figure 2 is a three-dimensional diagram of a hanger in a preferred embodiment of the present invention, Figure 3 It is a stereoscopic view of a workpiece clamping device in a preferred embodiment of the present invention.

[0040] like Figure 1 to Figure 3As shown, this embodiment provides a hanger, including a hook 1, a screw 3, a slider 4, a cylinder 5 and a workpiece clamping device 6. The fixing device includes a hook 1, and the hook 1 can be hung above the electrolytic cell. The rotating device includes a screw 3. The hook 1 is rotatably connected to one end of the screw 3. Optionally, the hook 1 is connected to the screw 3 through a bearing 2. Specifically, the non-hook-shaped end of the hook 1 is interference-fitted with the inner ring of the bearing 2, and the outer ring of the bearing 2 is interference-fitted with the screw 3. The driving device includes a slider 4, which is transmission-connected to the screw 3, and the slider 4 is used to move relative to the screw 3 to drive the screw 3 to rotate. Here, the movement of the slider 4 relative to the screw 3 should be understood as the movement and / or rotation of the slider 4 relative to the screw 3. Optionally, the slider 4 is outer-sheathed on the screw 3, and the slider 4 has an inner hole, and the inner hole has an internal thread and cooperates with the external thread of the screw 3. It should be known that the length of the thread arrangement on the screw 3 is set according to actual needs, and the present invention has no requirements for this.

[0041] The driving device further comprises a cylinder 5, which is connected to the slider 4 as a power source to drive the slider 4 to move. Figure 1 Taking the illustrated embodiment as an example, the slider 4 is driven to move up and down along the rotation axis, and the screw 3 is driven to rotate around the rotation axis by the cooperation between the internal thread of the slider 4 and the external thread of the screw 3. In other embodiments, other power sources can be used instead of the cylinder 5 to drive the slider 4 to move, such as a linear motor or a connecting rod mechanism. In addition, the slider 4 can also be eliminated, and the screw 3 can be driven to rotate (i.e., rotate) directly by the power source, or the slider 4 can be manually driven to move. The workpiece clamping device 6 includes a clamping portion 7 and a connecting portion 8. The connecting portion 8 is connected to the rotating device. Preferably, the rotating device also includes a cross bar 9, which is arranged on the screw 3 and arranged crosswise with the screw 3 (i.e., the angle with the screw 3 is not 0° or 180°), preferably arranged vertically, and the connecting portion 7 is connected to the cross bar 9. The clamping portion 7 is connected to the connecting portion 8 for loading the workpiece. There is no special requirement for the way the clamping portion 7 loads the workpiece. Optionally, the clamping portion 7 includes an elastic clip 71, and the elastic clip 71 can be elastically deformed to achieve clamping and fixing of the workpiece. The clamping portion 7 may include one or more elastic clips 71, and the plurality of elastic clips 71 may be evenly arranged circumferentially. In addition, in order to facilitate clamping of different workpieces, the clamping portion 7 is preferably detachably connected to the connecting portion 8, so as to facilitate replacement of the clamping portion 7. In other embodiments, the clamping portion 7 may also be non-detachably connected to the connecting portion 8, such as by welding.

[0042] In some embodiments, the connecting portion 8 is configured to be rotatable, in particular, multi-directional rotation, including 360° rotation. For example, taking the direction of the rotation axis of the screw 3 as the Z axis, the connecting portion 8 can rotate 360° around the Z axis, and deflect around the X axis and the Y axis. The X axis passes through a point on the connecting portion 8 and is perpendicular to the Z axis, the Y axis passes through a point on the connecting portion 8 and is perpendicular to the Z axis, and the X axis and the Y axis are perpendicular to each other. There are many ways to achieve the rotation of the connecting portion 8, and the present invention has no special limitation on this. For example, it can be achieved through structures such as ball joints (universal joints) or Hooke's joints. The connecting portion 8 is designed to expand and contract autonomously when it is affected by the gravity of the workpiece and the electrolyte during rotation.

[0043] In other embodiments, the connecting portion 8 is configured to be able to extend and retract in the direction of the rotation axis of the screw 3. The connecting portion 8 is designed to rotate autonomously when subjected to the force of the electrolyte during rotation. Preferably, the connecting portion 8 can both rotate and extend and retract up and down. Here, it cannot be narrowly understood that the extension direction of the connecting portion 8 is absolutely along the rotation axis of the screw 3, because in actual use, the extension direction is allowed to be parallel to or deviate from the rotation axis, which will not affect the use effect.

[0044] In actual operation, after the hook 1 is fixed above the electrolytic cell, the workpiece is placed in the electrolytic cell, and the electrolytic cell contains electrolyte. After that, the cylinder 5 is started to push the slider 4 to move, so that the screw 3 rotates, and drives the workpiece clamping device 6 to revolve around the screw 3. During this process, the workpiece also revolves around the screw 3 in the electrolytic cell, and due to the weight of the workpiece and the fluid resistance of the electrolyte, the connecting part 8 will automatically stretch up and down and shake left and right, causing the workpiece to also stretch and shake, thereby achieving the purpose of uniform electroplating or electropolishing. Among them, the stroke of the cylinder 5 can be set by itself, and the maximum does not exceed the stroke of the thread on the screw 3. It should also be understood that the rotating device is not limited to the screw 3, and can also be a rotating shaft without threads, and the rotating shaft can be driven electrically or manually to rotate.

[0045] Further Figure 3 As shown, the connecting portion 8 preferably includes a fixing portion 81 , a telescopic portion 82 and a rotating portion 83 .

[0046] The fixing portion 81 is connected to the rotating device. The fixing portion 81 can be connected to the cross bar 9, and the connection method can be detachably fixed or non-detachably fixed. Optionally, a through hole (not marked) is provided on the cross bar 9, and the fixing portion 81 is connected to the through hole, such as welding, interference fit, threaded connection, etc. Thereby ensuring that the workpiece clamping device 6 will not fall off when the rotating device rotates. Further, the cross bar 9 can be provided with a plurality of through holes, and the plurality of through holes are arranged at intervals along the length direction of the cross bar 9, and each through hole is connected to a workpiece clamping device 6, so that a plurality of workpiece clamping devices 6 can be assembled, and the plurality of workpiece clamping devices 6 are arranged at intervals in the same direction perpendicular to the rotation axis of the screw 3, and each workpiece clamping device 6 can hang a workpiece. The present invention can improve the efficiency of electrolytic treatment by clamping a plurality of workpieces at the same height, and can ensure the uniformity of electrolytic treatment. The telescopic portion 82 is connected to the fixing portion 81, and is used to telescope in the direction of the rotation axis of the screw 3, that is, it can telescope up and down, thereby driving the workpiece to telescope up and down. The rotating part 83 is connected to the telescopic part 82 and can rotate in multiple directions, especially 360 degrees. The present invention has no limitation on the structure of the telescopic part 82. For example, the telescopic part 82 may include a connecting rod structure or an elastic structure, especially an elastic structure. The elastic structure may be a flexible body made of elastic material, such as a wire, a rope or a belt, etc. The elastic structure may also be a spiral structure such as a spring. Preferably, the elastic structure is Figure 3 One end of the spring is connected to the fixed portion 81, and the other end is connected to the rotating portion 83.

[0047] Further, the fixed part 81 includes a shell, the telescopic part 82 is arranged in the shell, and the rotating part 83 can be arranged outside or inside the shell. The shell can be used to seal the telescopic part 82 to prevent the electrolysis process from affecting it, and the shell can limit the left and right swing of the spring to ensure the safety of electroplating. Optionally, a rod-shaped connector (not marked) is provided at one end of the shell, and the rod-shaped connector is inserted into the through hole for fixing. Further, one end of the spring is welded to the shell, and the other end is welded to the rotating part 83. Further, the present invention does not make any special limitation on the structure of the rotating part 83, including but not limited to structures such as universal joints or Hooke's hinges. In this embodiment, the rotating part 83 preferably includes a universal joint 831, which is convenient for swinging in any direction around the center of the cross axis to achieve simultaneous changes in angle and distance, and is also convenient for installation.

[0048] Next, the working method of the hanger of the present invention is further explained in combination with the scheme of the spring, the universal joint 831 and the elastic clip 71. When the electrolytic treatment is carried out, the weight of the workpiece will cause the spring (telescopic part 82) to be stretched, and when the workpiece clamping device 6 revolves around the screw 3, the weight of the workpiece itself plus the resistance of the water flow during rotation causes the spring to continuously deform, thereby driving the workpiece to shake up and down. At the same time, because the universal joint 831 will also be subject to fluid resistance during rotation, and because the universal joint 831 itself can rotate freely in multiple directions, the workpiece connected to the elastic clip 71 will also contact the electrolytic solution in multiple directions, not only avoiding the adhesion of bubbles to the workpiece surface through shaking, but also even if there are bubbles on the surface of the workpiece, they will leave the workpiece surface due to the rotation and shaking of the workpiece, thereby achieving the effect of uniformly electroplating or polishing the workpiece in the electrolytic solution, and can also eliminate the adhesion of bubbles to the tool surface, further improving the effect of electroplating or polishing.

[0049] It should be understood that the preferred embodiments of the present invention are as described above, but are not limited to the scope disclosed in the above embodiments. For example, it is not limited to connecting the workpiece clamping device 6 through the cross bar 9, nor is it limited to clamping the workpiece through the elastic clip 71. For example, a ring can also be provided on the screw 3, the ring is coaxially arranged with the screw 3, and a plurality of workpiece clamping devices 6 are arranged circumferentially on the ring. Furthermore, the cross bar 9 can be integrally formed with the screw 3 or separately formed, a plurality of cross bars 9 can be arranged around the axis of the screw 3, etc. In addition, the fixing device is not limited to the hook 1.

[0050] For another example, the rotating portion 83 may be disposed between the fixed portion 81 and the telescopic portion 82, or disposed between the telescopic portion 82 and the clamping portion 7 and between the fixed portion 81 and the telescopic portion 82, or at other positions capable of realizing the rotation of the connecting portion 8. That is, the rotating portion 83 may be connected to the fixed portion 81, and the telescopic portion 82 may be connected to the rotating portion 83.

[0051] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes or modifications made by a person skilled in the art in the field of the present invention based on the above disclosure shall fall within the protection scope of the present invention.

Claims

1. A hanger for loading workpieces in an electrolytic process, characterized in that: include: Fixing devices for connection with external mechanisms; A rotating device, the rotating device is rotatably connected to the fixing device around a rotation axis, the rotating device comprises a screw and a cross bar, the cross bar is arranged on the screw and cross-arranged with the screw; a workpiece clamping device for clamping a workpiece, and, A driving device, the driving device comprising a slider, the slider is drivingly connected to the screw, and the slider is used to move relative to the screw to drive the screw to rotate; The workpiece clamping device is connected to the rotating device and is configured to revolve around the rotation axis of the rotating device; The workpiece clamping device includes a connecting part and a clamping part; the clamping part is connected to the connecting part and is used to load the workpiece; the connecting part is configured to be able to rotate and to be able to extend and retract in the direction of the rotation axis; the connecting part includes a fixed part, a rotating part and an elastic retractable part; the fixed part is connected to the cross bar; the rotating part can rotate in multiple directions, and the retractable part is configured to autonomously extend and retract when affected by the gravity of the workpiece and the electrolyte during rotation.

2. The hanger according to claim 1, characterized in that: The telescopic portion is connected to the fixed portion and can be telescoped in the direction of the rotation axis; the rotating portion is connected to the telescopic portion.

3. The hanger according to claim 1, characterized in that: The rotating part is connected to the fixed part; the telescopic part is connected to the rotating part and can be telescopic in the direction of its own axis.

4. The hanger according to claim 2, characterized in that: The telescopic part comprises a spring, one end of the spring is connected to the fixed part, and the other end of the spring is connected to the rotating part.

5. The hanger according to claim 2, characterized in that: The fixing part comprises a shell, the telescopic part is arranged inside the shell, and the rotating part is arranged outside the shell.

6. The hanger according to claim 2, characterized in that: The rotating part is a ball hinge.

7. The hanger according to claim 1, characterized in that: The driving device further comprises a power source, and the power source is connected to the slider to drive the slider to move relative to the screw rod.

8. The hanger according to claim 7, characterized in that: The power source is a cylinder, a linear motor or a connecting rod mechanism.

9. The hanger according to any one of claims 1 to 6, characterized in that: It comprises a plurality of workpiece clamping devices, which are arranged at intervals in the same direction perpendicular to the rotation axis of the rotating device.

10. The hanger according to any one of claims 1 to 6, characterized in that: The fixing device comprises a hook, and the hook is rotatably connected to the rotating device through a bearing.

11. The hanger according to any one of claims 1 to 6, characterized in that: The clamping portion includes an elastic clip.

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