An automatic polishing tool and polishing method for metal support

Abstract

The application relates to the field of metal support polishing, in particular to an automatic polishing tool and polishing method for a metal support, the tool comprising a base, a rotating shaft, a motor, clamping members and a conductive wire, the rotating shaft being arranged on the base and capable of rotating relative to the base around a rotating shaft axis parallel to the vertical direction, the rotating shaft axis coinciding with the central axis of the rotating shaft; the two clamping members are sequentially arranged on the rotating shaft along the vertical direction and are relatively fixed with the rotating shaft; the conductive wire is used for clamping between the two clamping members, and in the clamping state, the part of the conductive wire between the two clamping members is arranged in parallel to the rotating shaft and is spaced apart from the rotating shaft in the radial direction of the rotating shaft; the application can reduce the consumption of polishing liquid and reduce the damage to the metal support.

Description

Technical Field

[0001] This application relates to the field of metal bracket polishing, and more particularly to an automatic polishing fixture and polishing method for metal brackets. Background Technology

[0002] Currently, for some metal implantable stents (i.e., metal stents), such as cardiac stents, the polishing method often adopts electrochemical polishing (also known as electrolytic polishing). The basic principle is that under specific polishing solution (or electrolyte), temperature and voltage conditions, the metal stent to be polished is used as the anode, another conductive material is used as the cathode, and a DC power supply is connected. Under the action of the electric field, the surface of the anode workpiece will undergo electrolysis, thus achieving polishing of the workpiece. In the electrochemical polishing of metal stents, the tooling used to mount the metal stent (equivalent to the anode tooling) has a significant impact on the polishing effect of the metal stent.

[0003] In related technologies, the metal support of the anode tooling is usually fitted onto a rotatable shaft. The purpose of setting up a rotatable shaft is to ensure that the contact position between the metal support and the shaft is constantly changed by the relative rotation between the shaft and the metal support, thereby ensuring the uniformity of polishing.

[0004] For example, patent document CN202421379813.1 provides a bracket polishing clamping fixture and bracket polishing jig. During electrolytic polishing, the rotating shaft can rotate, allowing the bracket to continuously change its contact position with the rotating shaft due to its own weight, polishing fluid resistance, and friction with the rotating shaft. This achieves dynamic contact between the fixture and the bracket, ensuring that all positions of the bracket can contact the polishing fluid. In this solution, the rotating shaft is horizontally set in the polishing tank, essentially making it a horizontal fixture. However, this design has certain shortcomings in practical applications. For instance, because the rotating shaft is horizontally set, a container with a large horizontal dimension (i.e., the polishing tank) is required to install the shaft. This necessitates a larger amount of polishing fluid in the container to fully immerse the metal bracket, resulting in greater fluid consumption. Furthermore, the polishing fluid in the container will immerse the transmission components connected to the rotating shaft, such as bearings, thus requiring high corrosion resistance from these components.

[0005] For example, patent document with application number CN202310539412.1 provides a cardiac stent polishing device and polishing method. In this solution, frosted glass is used to rotate the stent, which may cause scratches on the surface of the stent. Summary of the Invention

[0006] In order to solve at least one of the technical problems mentioned in the background art, the purpose of this application is to provide an automatic polishing fixture and polishing method for metal brackets.

[0007] To achieve the above objectives, this application provides the following technical solution.

[0008] In a first aspect, this application provides an automatic polishing fixture for metal brackets, comprising: Base; A rotating shaft is mounted on a base and is capable of rotating relative to the base about a rotation axis parallel to the vertical, wherein the rotation axis coincides with the central axis of the rotating shaft; An electric motor is used to drive the rotating shaft to rotate around the rotation axis; Two clamping components are arranged vertically on the rotating shaft and kept relatively fixed to the rotating shaft; A conductive wire is used to be clamped between two clamping components. In the clamped state, the portion of the conductive wire located between the two clamping components is parallel to the rotating shaft and is spaced apart from the rotating shaft in the radial direction.

[0009] As an optional embodiment of this application, of the two clamping components, the one that is closer to the base in the vertical direction constitutes the first clamping component, and the other constitutes the second clamping component, wherein the first clamping component is a conductive component, and the second clamping component and the rotating shaft are both insulating components.

[0010] As an optional embodiment of this application, the base is provided with a conductive slip ring, the conductive slip ring includes a first part and a second part that are electrically connected to each other and can rotate relative to each other around the rotation axis. Of the first part and the second part, one part is kept relatively fixed to the base, and the other part is fixed to the rotation axis and electrically connected to the first clamping member.

[0011] As an optional embodiment of this application, at least one of the two clamping components is capable of detachably clamping and fixing the conductive wire.

[0012] As an optional embodiment of this application, the clamping member has a cut for embedding the conductive wire. The cut is opened on the outer peripheral wall of the clamping member and is arranged radially along the clamping member. A removable retaining ring is fitted on the clamping member. In the clamping state, the conductive wire is pressed into the clamping member radially along the clamping member by the retaining ring.

[0013] As an optional embodiment of this application, the retaining ring is a fluororubber ring.

[0014] As an optional embodiment of this application, both clamping components are disc structures coaxially arranged with the rotating shaft, and an annular groove is formed on the outer peripheral wall of the clamping component for embedding a fixing ring.

[0015] As an optional embodiment of this application, the distance between the portion of the conductive wire located between the two clamping members and the rotating shaft is configured such that when the metal bracket is sleeved on the conductive wire and rotates relative to the conductive wire, the metal bracket will not contact the rotating shaft.

[0016] As an optional embodiment of this application, of the two clamping components, the one that is closer to the base in the vertical direction constitutes the first clamping component, and the other constitutes the second clamping component; the top surface of the second clamping component at least partially serves as the cross surface supporting the lower end of the metal bracket, the cross surface being a plane perpendicular to the axis of rotation; wherein, when the metal bracket is threaded onto the conductive wire, the lower end of the metal bracket at least partially slides out of the edge of the cross surface to be exposed.

[0017] Secondly, this application also provides a method for polishing a metal support, wherein the polishing method is electrochemical polishing, comprising the following steps: - Provides a conductive wire rotatable about a rotation axis, the conductive wire being at least partially parallel to the rotation axis and radially offset from the rotation axis to serve as a working section for a sleeved metal support; the rotation axis is parallel to the vertical. - After the metal support is fitted onto the metal support, the metal support should be immersed in the polishing solution at least once; and the conductive wire should be energized. - Drive the conductive wire to rotate intermittently around the rotation axis.

[0018] Compared with the prior art, this application has the following advantages: First, in this application, the rotating shaft is vertically positioned, thus not occupying excessive space in the horizontal direction. Consequently, the horizontal dimensions of the container holding the polishing fluid do not need to be too large. Compared to the horizontally positioned rotating shaft in the prior art, this application can use less polishing fluid to immerse the metal support, thereby reducing the consumption of polishing fluid. Moreover, the vertically positioned rotating shaft also ensures that some transmission components (such as conductive slip rings, couplings, etc.) are not immersed in the polishing fluid, thus avoiding corrosion caused by these components being immersed in the polishing fluid.

[0019] Secondly, in this application, there is no need to use frosted glass to rub the metal bracket as is common in the prior art, which can reduce damage to the metal bracket.

[0020] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this application, nor is it intended to limit the scope of this application. Other features of this application will become readily apparent from the following description. Attached Figure Description

[0021] The above and other objects, features, and advantages of exemplary embodiments of this application will become readily apparent from the following detailed description taken in conjunction with the accompanying drawings. Several embodiments of this application are illustrated in the drawings by way of example and not limitation, in which: In the accompanying drawings, the same or corresponding reference numerals indicate the same or corresponding parts.

[0022] Figure 1 A schematic diagram of the structure of Embodiment 1 of this application is shown; Figure 2 This paper shows a schematic diagram of the structure of Embodiment 1 of this application in the state of having a metal support installed; Figure 3 A cross-sectional view of Embodiment 1 of this application is shown in the state of having a metal support installed; Figure 4 A schematic diagram of the structure of the first loading component in Embodiment 1 of this application is shown.

[0023] Explanation of the labels in the diagram: X, vertical; L1, axis of rotation; M, metal support; 1. Base; 2. Shaft; 3. Motor; 41. First clamping component; 411. Cut; 412. Groove; 42. Second clamping component; 43. Fluoropolymer ring; 5. Conductive wire; 51. Working section; 6. Conductive slip ring; 7. Coupling. Detailed Implementation

[0024] To make the objectives, features, and advantages of this application more apparent and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] This application provides an automatic polishing fixture for metal brackets, comprising: Base; A rotating shaft is mounted on a base and is capable of rotating relative to the base about a rotation axis parallel to the vertical, wherein the rotation axis coincides with the central axis of the rotating shaft; An electric motor is used to drive the rotating shaft to rotate around the rotation axis; Two clamping components are arranged vertically on the rotating shaft and kept relatively fixed to the rotating shaft; A conductive wire is used to be clamped between two clamping components. In the clamped state, the portion of the conductive wire located between the two clamping components is parallel to the rotating shaft and is spaced apart from the rotating shaft in the radial direction.

[0026] It is worth noting that the tooling provided in this embodiment is mainly suitable for electrochemical reaction polishing (also known as electrochemical polishing, electrolytic polishing, etc.) of metal supports (i.e. workpieces).

[0027] The essence of electrochemical polishing is anodic dissolution. Under specific polishing solution (or electrolyte), temperature, and voltage conditions, the workpiece to be polished (such as the metal support in this application) is used as the anode, and another conductive material is used as the cathode. When a DC power supply is connected, electrolysis occurs on the surface of the anode workpiece under the action of an electric field, thus achieving polishing of the workpiece. The tooling provided in this application is essentially an anode tooling, used to mount the metal support, so that the metal support acts as the anode for electrochemical polishing.

[0028] Example 1 Figure 1 A schematic diagram of the structure of the automatic polishing fixture for the metal support M provided in the embodiment (hereinafter referred to as the fixture) is shown, as follows. Figure 1 As shown, the tooling mainly includes a base 1, a rotating shaft 2, a motor 3, a clamping assembly, and a conductive wire 5.

[0029] like Figure 1 As shown, the base 1 is basically U-shaped, but it can also be other shapes, depending on the actual needs. In actual use, the base 1 can be installed on the polishing tank (i.e., the container for holding polishing liquid), or it can be fixedly installed with the help of a carrier, depending on the actual needs.

[0030] The rotating shaft 2 is rotatably connected to the base 1, so that the rotating shaft 2 can rotate relative to the base 1 around its own central axis. At this time, the central axis of the rotating shaft 2 constitutes the rotation axis L1 of the rotating shaft 2. In addition, the rotating shaft 2 is set vertically X, so the rotation axis L1 is equivalent to being parallel to the vertical X, where the vertical X refers to the up and down direction.

[0031] Motor 3 is mainly used to provide driving force to drive shaft 2 to rotate around the rotation axis L1, such as Figure 1 As shown, the motor 3 is fixed on the base 1; in some embodiments, the main shaft of the motor 3 and the rotating shaft 2 are coaxially arranged. The coaxiality claimed in this embodiment refers to the central axis of the two components coinciding with each other. Taking the coaxiality of the main shaft of the motor 3 and the rotating shaft 2 as an example, it means that the central axis of the main shaft of the motor 3 coincides with the central axis of the rotating shaft 2.

[0032] Two clamping components are sequentially mounted on the rotating shaft 2 along the vertical X direction and kept relatively fixed to the rotating shaft 2.

[0033] In some embodiments, such as Figure 1As shown, without considering the material of the two clamping components, the overall structure of the two clamping components is basically the same, both being disc structures. Furthermore, both clamping components are set on the same axis as the rotating shaft 2.

[0034] To distinguish them, in this embodiment, the clamping member located on the upper side in the vertical X direction is referred to as the first clamping member 41, and the clamping member located on the lower side is referred to as the second clamping member 42; it can also be understood that, in the vertical X direction, the first clamping member 41 is closer to the base 1 than the second clamping member 42.

[0035] The conductive wire 5 has electrical conductivity and is a round rod structure; the specific material of the conductive wire 5 can be one of stainless steel, titanium, platinum, etc.

[0036] During polishing, the metal support M is threaded onto the conductive wire 5. It can be understood that the metal support M used in this embodiment is basically a circular mesh structure with a hollowed-out peripheral wall, so it can be threaded onto the conductive wire 5.

[0037] The two clamping components are mainly used to clamp and fix the conductive wire 5, such as Figure 1 As shown, the conductive wire 5 extends substantially vertically along the X direction. The upper part of the conductive wire 5 is clamped and fixed on the first clamping member 41, and the lower part of the conductive wire 5 is clamped and fixed on the second clamping member 42, so that the conductive wire 5 is in a clamped state. In the clamped state, the portion of the conductive wire 5 located between the two clamping members constitutes the working section 51 of the conductive wire 5. During polishing, the metal support M is mounted on the working section 51. The working section 51 is parallel to the rotating shaft 2, or in other words, parallel to the rotation axis L1, and the working section 51 is offset from the rotating shaft 2 in the radial direction to form a gap between it and the rotating shaft 2.

[0038] Figure 2 and Figure 3 A schematic diagram of the metal bracket M mounted on this tooling is shown, as follows. Figure 3 As shown, for ease of explanation, the radial distance between the working section 51 and the rotating shaft 2 is denoted as D. Figure 3 From this perspective, the spacing D can be understood as the distance between the rightmost end of the working section and the leftmost end of the rotating shaft 2.

[0039] During the subsequent polishing process, the metal support M is sleeved on the working section of the conductive wire 5. Thus, a portion of the metal support M is within the aforementioned spacing D. The metal support M will rotate relative to the working section. In order to prevent the metal support M from touching the rotating shaft 2 during rotation, in this embodiment, the aforementioned spacing D needs to meet the following condition: when the metal support M is sleeved on the conductive wire 5 and rotates relative to the conductive wire 5, the metal support M will not contact the rotating shaft 2. For example, the spacing D ≥ the outer diameter of the metal support M, where the outer diameter of the metal support M refers to the outer diameter of the metal support M.

[0040] Since it is necessary to apply voltage to the conductive wire 5 during polishing, it is necessary to electrically connect the conductive wire 5 to the power source that applies the voltage. The electrical connection claimed in this embodiment means that there is at least one path between the two electrically connected conductors that allows current to flow.

[0041] In order to enable the conductive wire 5 to be energized, in some embodiments, the first clamping member 41 is a conductive component, i.e., a conductor, so that when the conductive wire 5 comes into contact with the first clamping member 41, the two can be electrically connected to each other. In addition, since the conductive wire 5 needs to rotate with the rotating shaft 2, if the first clamping member 41 is directly connected to the power supply through a wire, the wire may be broken during rotation. Based on this, in this embodiment, the rotating shaft 2 and the main shaft of the motor 3 are connected by a conductive slip ring 6.

[0042] The conductive slip ring 6 has been widely used and described in the prior art. It mainly comprises two electrically connected and rotatable parts, a first part and a second part, which maintain their electrical connection during relative rotation. Specifically, in this embodiment, the conductive slip ring 6 is mounted on the base 1, and the axis of relative rotation between the first and second parts of the conductive slip ring 6 coincides with the rotation axis L1 of the rotating shaft 2. The first part of the conductive slip ring 6 is fixed to the base 1 for electrical connection to a power source, for example, by means of a wire. The second part of the conductive slip ring 6 is fixed to the rotating shaft 2, allowing the second part and the rotating shaft 2 to rotate synchronously. The second part is also electrically connected to the first clamping member 41, for example, by means of a wire or conductive sheet. In addition, the main shaft of the motor 3 is fixed to the second part through the coupling 7, so that the motor 3 can drive the second part and the rotating shaft 2 to rotate synchronously around the rotation axis L1, and the conductive wire 5 can form an electrical connection with the power source while rotating. The current path formed is: power source - first part - second part - first clamping member 41 - conductive wire 5, so as to achieve the purpose of connecting the conductive wire 5 to the power source.

[0043] In addition, in this embodiment, both the rotating shaft 2 and the second loading member are insulating components, i.e., non-conductors; the purpose is to prevent the second loading member and the rotating shaft 2 from being electrolyzed in the polishing liquid during polishing; furthermore, the rotating shaft 2 and the second loading member are preferably made of corrosion-resistant materials, for example, the rotating shaft 2 and / or the second loading member are made of one of the following materials: PTFE, PE, PP, PEEK, etc.

[0044] In this embodiment, the first clamping member 41 and the second clamping member 42 are basically the same in terms of physical structure except for the material. Therefore, for the sake of convenience, the physical structure of the first clamping member 41 will be used as an example for specific explanation in this embodiment.

[0045] Figure 4 The specific structure of the first clamping member 41 is shown, as follows: Figure 4 As shown, the first clamping component 41 is basically a disc structure and is coaxially fixed on the rotating shaft 2.

[0046] It is understandable that in order to fit the metal bracket M onto the conductive wire 5, at least one of the first clamping member 41 and the second clamping member 42 needs to be able to clamp and fix the conductive wire 5 in a detachable manner. For example, in this embodiment, both clamping members clamp the conductive wire 5 in the same detachable connection manner. Since the clamping structures of the two clamping members are basically the same, the clamping structure of the first clamping member 41 will be described below as an example in this embodiment.

[0047] A cutout 411 is provided on the outer peripheral wall of the first clamping member 41 for inserting the conductive wire 5. The cutout 411 is basically arranged along the radial direction of the first clamping member 41 and penetrates the axial end walls and the outer peripheral wall of the first clamping member 41. Thus, the cutout 411 is open on one side of the outer peripheral wall of the first clamping member 41 to serve as the insertion port for inserting the conductive wire 5 into the cutout 411.

[0048] In addition, the first clamping member 41 is fitted with a fixing ring, which presses the conductive wire 5 embedded in the cut 411 along the radial direction of the clamping member onto the clamping member. Under the pressure of the fixing ring, the conductive wire 5 can form contact with the first clamping member 41 to achieve electrical connection between the two.

[0049] In some embodiments, the fixing ring can be made of an elastic material, such as a fluororubber ring 43. During clamping, the elastic force of the fluororubber ring 43 will tighten the conductive wire 5 onto the clamping component. Of course, in other optional embodiments, the fixing ring can also be made of a rigid but tightening component, such as a clamp, which can also achieve the clamping and fixing of the conductive wire 5.

[0050] The reason for embedding the conductive wire 5 into the cut 411 is that the conductive wire 5 can be positioned by the two opposing side walls of the cut 411, so that the conductive wire 5 can rotate circumferentially with the clamping component.

[0051] In order to position the fluororubber ring 43 and prevent it from falling off the clamping member, a groove 412 is provided on the first clamping member 41 to enclose the fluororubber ring 43. During clamping, the fluororubber ring 43 is fitted into the groove 412 to tighten the conductive wire 5.

[0052] The construction of the second clamping member 42 can be referred to the description of the first clamping member 41, which is also provided with a notch 411, a groove 412 and a retaining ring.

[0053] The polishing principle of this embodiment is as follows: During polishing, the metal support M is sleeved on the working section of the conductive wire 5, and the conductive wire 5 is in an energized state; when the rotating shaft 2 is driven by the motor 3 to rotate, it can drive the conductive wire 5 to rotate together with the rotating shaft 2. Since the working section 51 of the conductive wire 5 is offset from the rotation axis L1 of the rotating shaft 2, when the conductive wire 5 rotates, the metal support M and the conductive wire 5 can be brought into close contact with each other under the action of centrifugal force, so that the metal support M becomes an anode as a whole, so as to achieve electrochemical polishing in the polishing liquid.

[0054] During this process, the area where the metal support M contacts the conductive wire 5 is blocked by the conductive wire 5, making it difficult to polish. Therefore, the contact area between the metal support M and the conductive wire 5 needs to be continuously changed during the polishing process. Thus, in actual operation, the motor 3 needs to be started intermittently to make the rotating shaft 2 rotate intermittently. Specifically: After the rotating shaft 2 rotates for a period of time, the motor 3 is turned off to stop the rotating shaft 2. At this time, the conductive wire 5 also stops rotating synchronously, while the metal bracket M, which is sleeved on the conductive wire 5, will rotate relative to the conductive wire 5 under the action of inertia. When the motor 3 is turned on again to drive the rotating shaft 2 to rotate, the metal bracket M will make contact with the conductive wire 5 in a new position for polishing. By repeating the above steps, the contact position between the metal bracket M and the conductive wire 5 can be changed continuously, so that the inner peripheral wall of the metal bracket M can be polished as much as possible to achieve the purpose of uniform polishing.

[0055] In this embodiment, the rotating shaft 2 is vertically X-shaped, thus not occupying excessive space in the horizontal direction. Therefore, the horizontal dimension of the container holding the polishing fluid does not need to be too large. Compared with the horizontally shaped rotating shaft 2 in the prior art, this application can use less polishing fluid to achieve immersion of the metal support M, thereby reducing the consumption of polishing fluid. Moreover, the vertically X-shaped rotating shaft 2 also ensures that some transmission parts (such as the conductive slip ring 6, coupling 7, etc.) are not immersed in the polishing fluid, thereby avoiding corrosion caused by these parts being immersed in the polishing fluid.

[0056] Furthermore, since the bottom of the metal bracket M is supported by the second clamping member 42, i.e., the top surface of the second clamping member 42 serves as the cross-sectional surface supporting the lower end of the metal bracket M, and this cross-sectional surface is a plane perpendicular to the rotation axis L1, if the lower end of the metal bracket M completely rests on this cross-sectional surface, the lower end of the metal bracket M will be completely obscured by the cross-sectional surface and difficult to polish. Therefore, in some embodiments, when designing the clamping position of the conductive wire 5 on the clamping member, it is necessary to ensure that when the metal bracket M is threaded onto the conductive wire 5, the lower end of the metal bracket M can at least partially slide out of the edge of the cross-sectional surface to be exposed. For example, the radial length of the groove on the clamping member should be less than the inner diameter of the metal bracket M, where the inner diameter of the metal bracket M refers to the diameter of the inner ring of the metal bracket M; thus, as... Figure 3 Taking the perspective shown as an example, when the inner peripheral wall of the metal bracket M comes into contact with the conductive wire 5, part of the lower end of the metal bracket M rests on the carrier surface, while the other part protrudes to the left from the carrier surface to contact the polishing liquid. Thus, with the above polishing cycle, the part of the metal bracket M that comes into contact with the carrier surface can be continuously changed, so that the lower end surface of the metal bracket M can also be polished evenly.

[0057] Example 2 This embodiment provides a polishing method for a metal support M, which mainly includes the following steps: - Provides a conductive wire 5 that can rotate about a rotation axis L1, the conductive wire 5 being at least partially parallel to the rotation axis L1 and radially offset from the rotation axis L1 to serve as a working section 51 for passing through a metal support M; the rotation axis L1 is parallel to the vertical X; - After the metal bracket M is fitted onto the metal bracket M, the metal bracket M should be immersed in the polishing liquid at least; and the conductive wire 5 should be energized. - The conductive wire 5 is driven to rotate intermittently around the rotation axis L1. Here, intermittent rotation means that the conductive wire 5 stops rotating after rotating for a period of time, then rotates again, and stops again, and so on in a cycle.

[0058] As a specific implementation method, the polishing method provided in this embodiment can be performed based on the automatic polishing fixture of the metal support M provided in Embodiment 1. The specific steps are as follows: First, the metal support M is threaded onto the working section 51 of the conductive wire 5; and the metal support M is immersed in the polishing liquid; then, the conductive wire 5 is energized and the polishing liquid is connected to the cathode; subsequently, the motor 3 is started intermittently, so that the conductive wire 5 starts and stops intermittently around the rotation axis L1, thereby changing its contact position with the conductive wire 5 to perform uniform polishing.

[0059] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this application can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution disclosed in this application can be achieved, and this is not limited herein.

[0060] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0061] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An automatic polishing fixture for metal brackets, characterized in that, include: Base; A rotating shaft is mounted on a base and is capable of rotating relative to the base about a rotation axis parallel to the vertical, wherein the rotation axis coincides with the central axis of the rotating shaft; An electric motor is used to drive the rotating shaft to rotate around the rotation axis; Two clamping components are arranged vertically on the rotating shaft and kept relatively fixed to the rotating shaft; A conductive wire is used to be clamped between two clamping components. In the clamped state, the portion of the conductive wire located between the two clamping components is parallel to the rotating shaft and is spaced apart from the rotating shaft in the radial direction.

2. The automatic polishing fixture for a metal bracket according to claim 1, characterized in that, Of the two clamping components, the one that is closer to the base in the vertical direction constitutes the first clamping component, and the other constitutes the second clamping component. The first clamping component is a conductive component, while the second clamping component and the rotating shaft are both insulating components.

3. The automatic polishing fixture for a metal bracket according to claim 2, characterized in that, The base is provided with a conductive slip ring, which includes a first part and a second part that are electrically connected to each other and can rotate relative to each other around the rotation axis. Of the first part and the second part, one part is fixed relative to the base, and the other part is fixed to the rotation axis and electrically connected to the first clamping member.

4. The automatic polishing fixture for a metal bracket according to claim 1, characterized in that, Two clamping components, at least one of which can detachably clamp and fix the conductive wire.

5. The automatic polishing fixture for a metal bracket according to claim 4, characterized in that, The clamping member has a cut for embedding the conductive wire. The cut is located on the outer peripheral wall of the clamping member and is arranged radially along the clamping member. A removable retaining ring is fitted on the clamping member. In the clamping state, the retaining ring presses the conductive wire radially onto the clamping member.

6. The automatic polishing fixture for a metal bracket according to claim 5, characterized in that, The retaining ring is a fluororubber ring.

7. An automatic polishing fixture for a metal bracket according to claim 5 or 6, characterized in that, Both clamping components are disc structures coaxial with the rotating shaft, and an annular groove is formed on the outer peripheral wall of the clamping component for embedding a fixing ring.

8. The automatic polishing fixture for a metal bracket according to claim 1, characterized in that, The distance between the portion of the conductive wire located between the two clamping components and the rotating shaft is configured such that the metal support will not contact the rotating shaft when it is sleeved on the conductive wire and rotates relative to the conductive wire.

9. The automatic polishing fixture for a metal bracket according to claim 1, characterized in that, Of the two clamping components, the one that is closer to the base in the vertical direction constitutes the first clamping component, and the other constitutes the second clamping component; the top surface of the second clamping component at least partially serves as the cross surface supporting the lower end of the metal bracket, the cross surface being a plane perpendicular to the axis of rotation; wherein, when the metal bracket is threaded onto the conductive wire, the lower end of the metal bracket at least partially slides out of the edge of the cross surface to be exposed.

10. A method for polishing a metal support, characterized in that, The polishing method is electrochemical polishing, which includes the following steps: - Provides a conductive wire rotatable about a rotation axis, the conductive wire being at least partially parallel to the rotation axis and radially offset from the rotation axis to serve as a working section for a sleeved metal support; the rotation axis is parallel to the vertical. - After the metal support is fitted onto the metal support, the metal support should be immersed in the polishing solution at least once; and the conductive wire should be energized. - Drive the conductive wire to rotate intermittently around the rotation axis.

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