Electrochemical polishing hanging device

Abstract

The utility model relates to an electrochemical polishing hanging device, and relates to the technical field of polishing. The electrochemical polishing hanging device comprises the rotating mechanism, the polishing mechanism and the hanging component, and the hanging component can be driven by the rotating mechanism to be switched between forward rotation and reverse rotation, so that the contact position between the hanging component and an object to be polished can be changed; and the contact part between the hanging component and the to-be-polished object is not fixed in the polishing process, so that the problem that the contact point becomes black or dirty can be avoided, and the attractiveness of the appearance of the to-be-polished object and the corrosion resistance of the to-be-polished object are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of polishing, in particular to an electrochemical polishing hanging device. Background Art

[0002] Medical stents are mainly used in tissue cavities or blood vessel cavities in the body to expand the tissue cavities or blood vessel cavities to achieve the purpose of treating diseases such as stenosis and blockage of the tissue cavities or blood vessel cavities. In order to improve the performance of medical stents, they are generally polished using electrochemical polishing liquid. During polishing, the medical stent is supported in the polishing liquid by a support, so the contact part between the support and the medical stent is relatively fixed, so that the fixed contact part will appear black or dirty during the polishing process, which affects the appearance of the medical stent and its corrosion resistance. Utility Model Content

[0003] The utility model provides an electrochemical polishing hanging device, which is used to solve at least one of the above-mentioned technical problems.

[0004] The utility model provides an electrochemical polishing hanging device, comprising:

[0005] A rotating mechanism, wherein the rotating mechanism can switch between a forward rotation and a reverse rotation at a preset switching frequency;

[0006] A polishing mechanism, the polishing mechanism comprising a polishing liquid container carrying a polishing liquid; and

[0007] A hanging member, one side of which is connected to the rotating mechanism, and the other side of which is used to hang the object to be polished and immerse the object to be polished in the polishing liquid container.

[0008] Wherein, the hanging member is constructed so that when it is driven by the rotating mechanism to switch between forward rotation and reverse rotation, the contact position between it and the object to be polished can be changed.

[0009] In one implementation, the preset switching frequency is once every 1s-5s.

[0010] In one embodiment, the hanging member is formed by two or more metal wires intertwined with each other, and the ends of the metal wires form hooks for hooking the object to be polished, and the hooks are used to form point contact connection with the object to be polished.

[0011] In one embodiment, the metal wire is a titanium wire.

[0012] In one embodiment, the rotating mechanism comprises:

[0013] A motor, wherein the motor is connected to a motor reversing switch, and the motor reversing switch can change the rotation direction of the motor;

[0014] a coupling, the coupling being insulated and connected to the motor via a first bearing; and

[0015] A connector, one side of which is connected to the coupling via a second bearing, and the other side of which is conductively connected to the hanging member.

[0016] In one embodiment, the polishing liquid container further includes a polishing power supply, an anode and a cathode of the polishing power supply are respectively connected to an anode terminal and a cathode terminal, and the anode terminal is conductively connected to the second bearing.

[0017] In one embodiment, the polishing liquid container further comprises a porous metal tube disposed in the polishing liquid container, the object to be polished can be placed inside the porous metal tube, and the porous metal tube is conductively connected to the cathode terminal.

[0018] In one embodiment, the polishing liquid container further includes a refrigerator carrying refrigerant, and the polishing liquid container is disposed in the refrigerator.

[0019] In one embodiment, the liquid level of the refrigerant in the refrigerator is consistent with the liquid level of the polishing liquid in the polishing liquid container.

[0020] In one embodiment, the polishing liquid container further comprises a magnetic stirrer disposed in the polishing liquid container, and the magnetic stirrer rotates under the action of the refrigerator to stir the polishing liquid.

[0021] Compared with the prior art, the advantage of the utility model is that the hanging member can be driven by the rotating mechanism to switch between positive rotation and reverse rotation, thereby changing the contact position between the hanging member and the object to be polished, so that the contact position between the hanging member and the object to be polished is not fixed during the polishing process, thereby avoiding the problem of blackening or dirtiness of the contact point, thereby improving the aesthetic appearance of the object to be polished and improving its corrosion resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0023] Figure 1 It is a structural schematic diagram of the electrochemical polishing hanging device in the embodiment of the utility model;

[0024] Figure 2 It is a structural schematic diagram of the embodiment of the utility model when the hanging member and the object to be polished are connected;

[0025] Figure 3 yes Figure 1 Schematic diagram of the structure of the connector.

[0026] Reference numerals:

[0027] 1. Rotating mechanism; 11. Motor; 12. Coupling; 13. Connector; 14. Motor reversing switch; 15. First bearing; 16. Second bearing; 17. Housing;

[0028] 2. Polishing mechanism; 21. Polishing liquid container; 22. Multi-hole metal tube; 23. Anode terminal; 24. Cathode terminal; 25. Magnetic stirrer; 26. Refrigerator; 27. Power supply for polishing;

[0029] 131, claw portion; 132, connecting hole; 133, tooth portion; 134, rotating disk; 135, adjusting knob; 1341, spiral tooth; 1342, annular tooth; 1351, bevel gear;

[0030] 3. Hanging member; 31. Hook;

[0031] 4. Object to be polished; 41. Wave peak. DETAILED DESCRIPTION

[0032] The utility model will be further described below in conjunction with the accompanying drawings.

[0033] like Figure 1 and Figure 2 As shown, the utility model provides an electrochemical polishing hanging device, comprising a rotating mechanism 1, a polishing mechanism 2 and a hanging member 3. The rotating mechanism 1 can switch between positive rotation and reverse rotation at a preset switching frequency. The polishing mechanism 2 includes a polishing liquid container 21 carrying a polishing liquid. One side of the hanging member 3 is connected to the rotating mechanism 1, and the other side of the hanging member 3 is used to hang the object to be polished 4 and immerse the object to be polished 4 in the polishing liquid container 21.

[0034] The object to be polished 4 may be, for example, a medical stent, which may be made of metals such as stainless steel, titanium alloy, nickel-titanium alloy or cobalt-chromium alloy by laser cutting or weaving.

[0035] The polishing mechanism 2 uses a polishing liquid to polish the object to be polished 4 immersed therein by an electrochemical method, so that the surface of the object to be polished 4 can be smooth and bright, achieving a mirror effect, thereby improving the biocompatibility and corrosion resistance of the object to be polished 4, and improving the application performance of the object to be polished 4.

[0036] Among them, when the rotating mechanism 1 switches between forward rotation and reverse rotation at a preset switching frequency, it can drive the hanging component 3 to switch between forward rotation and reverse rotation, so that the contact position between the hanging component 3 and the object to be polished 4 can be continuously changed, thereby solving the problem of blackening or dirtiness of the contact point between the hanging component 3 and the object to be polished 4.

[0037] Specifically, the preset switching frequency is 1s-5s switching, that is, after the rotating mechanism 1 rotates in the forward direction for 1s-5s, it switches to rotate in the reverse direction; after rotating in the reverse direction for 1s-5s, it switches to rotate in the forward direction again, and the above process is repeated until the electrochemical polishing process is completed.

[0038] The hanging member 3 is formed by two or more metal wires intertwined with each other, and the ends of each metal wire form a hook portion 31 for hooking the object to be polished 4, and the hook portion 31 is used to form a point contact connection with the object to be polished 4. Figure 2 As shown, the hanging member 3 is formed by two metal wires in a spirally wound manner, and the end of each metal wire forms a hook portion 31, and the peak 41 of the object to be polished 4 can be hung on the hook portion 31. Since the hook portion 31 is a curved hook-shaped structure, it forms a point contact with the peak 41 of the object to be polished 4 after being hung on each other, so the hanging member 3 will not restrict the circumferential rotation of the object to be polished 4.

[0039] When the rotating mechanism 1 rotates in the positive direction, the hanging member 3 and the object to be polished 4 can be driven to rotate in the positive direction. At this time, the hook portion 31 of the object to be polished 4 forms a point contact with the wave crest 41 of the object to be polished 4 at a certain position; when the rotating mechanism 1 rotates in the reverse direction, the hanging member 3 and the object to be polished 4 can be driven to rotate in the reverse direction. Therefore, the hanging member 3 and the object to be polished 4 both change their rotation direction, and because the hanging member 3 does not constrain the circumferential rotation of the object to be polished 4, the rotation speeds of the hanging member 3 and the object to be polished 4 are not synchronized, so that the contact position between the two changes, that is, the hook portion 31 of the object to be polished 4 forms a point contact with the wave crest 41 of the object to be polished 4 at another position. At this time, when polishing is performed, the hook portion 31 of the object to be polished 4 and the wave crest 41 of the object to be polished 4 can be polished at the previous contact point or the previous several times, and vice versa, thereby avoiding the phenomenon that the contact point between the hook portion 31 of the object to be polished 4 and the wave crest 41 of the object to be polished 4 becomes black or dirty.

[0040] Furthermore, the metal wire forming the hanging member 3 is a titanium wire, which can be used as an anode for electrochemical polishing.

[0041] like Figure 1As shown, the rotating mechanism 1 includes a motor 11, a coupling 12 and a connector 13. The motor 11 is connected to a motor reversing switch 14, and the motor reversing switch 14 can change the rotation direction of the motor 11. The coupling 12 is insulated and connected to the motor 11 through a first bearing 15, and the specific connection method can be connected by fasteners such as bolts. One side of the connector 13 is connected to the coupling 12 through a second bearing 16, and the other side of the connector 13 is conductively connected to the hanging member 3.

[0042] The motor reversing switch 14 is used to switch the positive and negative poles of the motor 11, and can realize the switching between the forward rotation and the reverse rotation of the motor 11. The motor reversing switch 14 can be controlled by a controller or manually controlled by an operator. For example, the motor reversing switch 14 can include a forward rotation button, a stop rotation button, and a reverse rotation button, which correspond to the forward rotation, the stop rotation, and the reverse rotation of the motor 11, respectively.

[0043] The motor reversing switch 14 can be connected to a DC power supply, the voltage of the DC power supply is 3V to 12V, and the speed of the motor 11 can be adjusted by adjusting the DC power supply.

[0044] In an optional embodiment, the motor is a precision N20 reduction motor, and its operating voltage is 3V to 6V (36 rpm to 72 rpm).

[0045] An insulating member (eg, an insulating member) is provided in the coupling 12 to insulate the motor 11 from the hanging member 3 (used as an anode).

[0046] The rotating mechanism 1 further includes a housing 17 . The housing 17 is made of a non-conductive material and can fix the motor 11 , the first bearing 15 , the second bearing 16 and the coupling 12 therein.

[0047] In an optional embodiment, the connector 13 is configured as a multi-jaw chuck. Figure 3 As shown, a rotating disk 134 and a plurality of claws 131 are provided inside the connector 13. The plurality of claws 131 are arranged at intervals in the circumferential direction of the rotating disk 134, and connecting holes 132 are formed between the plurality of claws 131. An adjusting button 135 is also provided on the circumferential side wall of the connector 13. A spiral tooth 1341 is provided on one end face of the rotating disk 134, and an annular tooth 1342 is provided on the opposite face thereof. The adjusting button 135 is provided with a bevel gear 1351, and the bevel gear 1351 can mesh with the annular tooth 1342 of the rotating disk 134, and can drive the rotating disk 134 to rotate. A tooth portion 133 is provided at the bottom of each claw portion 131, and the spiral tooth 1341 of the rotating disk 134 can mesh with a tooth portion 133 of each claw portion 131, so that when the rotating disk 134 rotates, each claw portion 131 can be driven to move concentrically.

[0048] like Figure 1As shown, the polishing liquid container 21 also includes a polishing power supply 27 , the anode and cathode of the polishing power supply 27 are respectively connected to an anode terminal 23 and a cathode terminal 24 , and the anode terminal 23 is conductively connected to the second bearing 16 .

[0049] Therefore, the anode of the polishing liquid container 21 is conductively connected to the hanging member 3 through the anode terminal 23, the second bearing 16 and the connector 13. The hanging member 3 is formed of titanium wire, so it can be used as an anode for electrochemical polishing.

[0050] The anode terminal 23 penetrates the housing 17 and is connected to the second bearing 16 . The anode terminal 23 may be, for example, a metal fastener such as a bolt, which can achieve electrical conduction.

[0051] The polishing liquid container 21 also includes a porous metal tube 22 disposed in the polishing liquid container 21, and the object 4 to be polished can be placed inside the porous metal tube 22, and the porous metal tube 22 is conductively connected to the cathode terminal 24. Therefore, in the polishing liquid container 21, the hanging member 3 forms an anode, and the porous metal tube 22 forms a cathode, so that the object 4 to be polished is electrochemically polished.

[0052] The porous metal tube 22 can be a porous stainless steel tube with a diameter of 80 mm and a wall thickness of 1 mm, so that an ordinary medical stent can be accommodated inside; the height of the porous metal tube 22 is 180 mm, which is greater than the length of an ordinary medical stent, so the length of the ordinary medical stent will not touch the bottom of the polishing liquid container 21 after being placed therein; the pore diameter of the porous metal tube 22 is 3 mm, and the polishing liquid in the polishing liquid container 21 can pass through it.

[0053] Furthermore, the cathode terminal 24 is a columnar structure having a diameter of 4 mm and a height of 50 mm.

[0054] The polishing liquid container 21 also includes a refrigerator 26 carrying a refrigerant, and the polishing liquid container 21 is arranged in the refrigerator 26. The refrigerator 26 can cool the polishing liquid in the polishing liquid container 21, thereby improving the polishing effect. Among them, the refrigerant can be alcohol. The refrigeration temperature of the refrigerator 26 can be -20°C, because the polishing liquid will freeze at -20°C, so an ice-water mixture will be formed in the polishing liquid container 21, which will put the object to be polished 4 in the polishing liquid in a suspended state, that is, the gravity G of the object to be polished 4 is equal to the buoyancy of the object to be polished 4 in the polishing liquid and the suspension tension applied to it by the hanging member 3.

[0055] Furthermore, the object to be polished 4 needs to be completely immersed in the polishing liquid, that is, the liquid level of the polishing liquid in the polishing liquid container 21 needs to be greater than the length of the object to be polished 4, and the liquid level of the refrigerant in the refrigerator 26 is consistent with the liquid level of the polishing liquid in the polishing liquid container 21 to ensure that all the polishing liquid can be cooled by the refrigerant.

[0056] like Figure 1 As shown, the polishing liquid container 21 also includes a magnetic stirrer 25 arranged in the polishing liquid container 21. The magnetic stirrer 25 rotates under the action of the refrigerator 26 to stir the polishing liquid so that the polishing liquid remains in a state of an ice-water mixture, thereby improving the polishing effect.

[0057] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An electrochemical polishing hanging device, characterized in that: include: A rotating mechanism (1), wherein the rotating mechanism (1) is capable of switching between forward rotation and reverse rotation at a preset switching frequency; A polishing mechanism (2), the polishing mechanism (2) comprising a polishing liquid container (21) carrying a polishing liquid; as well as A hanging member (3), one side of the hanging member (3) is connected to the rotating mechanism (1), and the other side of the hanging member (3) is used to hang the object to be polished (4) and immerse the object to be polished (4) in the polishing liquid container (21). The hanging member (3) is configured such that when it is driven by the rotating mechanism (1) to switch between forward rotation and reverse rotation, the contact position between it and the object to be polished (4) can be changed; The hanging member (3) is formed by two or more metal wires intertwined with each other, and the ends of the metal wires respectively form hooks (31) for hooking the object to be polished (4), and the hooks (31) are used to form a point contact connection with the object to be polished (4).

2. The electrochemical polishing hanging device according to claim 1, characterized in that: The preset switching frequency is once every 1s-5s.

3. The electrochemical polishing hanging device according to claim 1, characterized in that: The metal wire is a titanium wire.

4. The electrochemical polishing hanging device according to claim 1 or 2, characterized in that: The rotating mechanism (1) comprises: A motor (11), wherein the motor (11) is connected to a motor reversing switch (14), and the motor reversing switch (14) can change the rotation direction of the motor (11); A coupling (12), the coupling (12) being insulated and connected to the motor (11) via a first bearing (15); and A connector (13), one side of the connector (13) is connected to the coupling (12) via a second bearing (16), and the other side of the connector (13) is electrically connected to the hanging member (3).

5. The electrochemical polishing hanging device according to claim 4, characterized in that: The polishing liquid container (21) also includes a polishing power supply (27), wherein the anode and cathode of the polishing power supply (27) are respectively connected to an anode terminal (23) and a cathode terminal (24), and the anode terminal (23) is conductively connected to the second bearing (16).

6. The electrochemical polishing hanging device according to claim 5, characterized in that: The polishing liquid container (21) further comprises a porous metal tube (22) arranged in the polishing liquid container (21), the object to be polished (4) can be placed inside the porous metal tube (22), and the porous metal tube (22) is conductively connected to the cathode terminal (24).

7. The electrochemical polishing hanging device according to claim 1 or 2, characterized in that: The polishing liquid container (21) further comprises a refrigerator (26) carrying refrigeration liquid, and the polishing liquid container (21) is arranged in the refrigerator (26).

8. The electrochemical polishing hanging device according to claim 7, characterized in that: The liquid level of the refrigerant in the refrigerator (26) is consistent with the liquid level of the polishing liquid in the polishing liquid container (21).

9. The electrochemical polishing hanging device according to claim 7, characterized in that: The polishing liquid container (21) further comprises a magnetic stirrer (25) arranged in the polishing liquid container (21); the magnetic stirrer (25) rotates under the action of the refrigerator (26) to stir the polishing liquid.

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