CN112064103A - Periodical rotation electrochemical polishing device and polishing method for intravascular stent - Google Patents

Abstract

The invention discloses a periodical rotation electrochemical polishing device for a vascular stent, which comprises an anode mechanical driving mechanism, a deflector rod mechanism, a polishing tank, a cathode assembly and the vascular stent, wherein the deflector rod mechanism continuously changes the contact position of a conductive wire and the vascular stent, reduces polishing residues at the contact position, effectively solves the problems of uneven thickness of the whole stent, too thin two ends and obvious traces left at a clamping position in the electrochemical polishing process of the vascular stent, improves the yield and reduces the labor intensity; the screw rod sliding block is driven by the servo motor to lift up and down on the screw rod and the sliding seat, so that the movable part of the anode mechanical arm, the pressing and clamping assembly, the conductive wire and the blood vessel support are driven to be brought into the cathode assembly in the polishing groove for polishing, and the size uniformity of the blood vessel support in the polishing groove cathode assembly during polishing is effectively ensured; the movable plate of the pressing clamp is adjusted to tension the conductive wires, so that the thickness of the whole polished bracket is uniform, and the two ends of the polished bracket are flat.

Description

Periodical rotation electrochemical polishing device and polishing method for intravascular stent

Technical Field

The invention relates to the technical field of intravascular stent polishing, in particular to a periodical rotating electrochemical polishing device and a periodical rotating electrochemical polishing method for an intravascular stent.

Background

Cardiovascular and cerebrovascular diseases are considered as one of the most serious diseases harming human life all over the world, wherein the morbidity and mortality of coronary heart disease are the first of all diseases, and vascular stent implantation is an effective method for treating coronary heart disease. The blood vessel stent is mainly divided into a coronary stent, a cerebrovascular stent, a renal artery stent, an aorta stent and the like. At present, the metal intravascular stent is mainly used clinically and mainly comprises stainless steel, cobalt-chromium alloy, nickel-titanium alloy, magnesium alloy and other materials.

The metal blood vessel stent is polished in the production process to ensure that the surface of a workpiece is bright and flat, and then the subsequent further processing can be carried out. In view of the problems that the vascular stent obtained by polishing with the existing polishing device often has a series of problems of uneven thickness of the whole stent, too thin two ends, and obvious traces left on the clamping position, a new electrochemical polishing device is urgently needed to be provided by the technical personnel in the field.

Disclosure of Invention

The invention aims to solve the problems that the contact position of a conductive wire and a vascular stent is continuously changed through a deflector rod mechanism, the polishing residue at the contact position is reduced, the problems of uneven thickness of the whole stent, excessively thin two ends and obvious trace residue at a clamping position in the electrochemical polishing process of the vascular stent can be effectively solved, the yield is effectively improved, the mechanical automation degree is high, and the labor intensity is greatly reduced; the screw rod sliding block is driven by the servo motor to lift up and down on the screw rod and the sliding seat, so that the movable part of the anode mechanical arm, the pressing and clamping assembly, the conductive wire and the blood vessel support are driven to be brought into the cathode assembly in the polishing groove for polishing, the size uniformity of the blood vessel support in the polishing groove during polishing is effectively ensured, and meanwhile, the stability during conveying can be effectively ensured; the blood vessel support wears on the electrically conductive silk to press and press the clamp to press the draw-in groove on pressing the clamp movable plate through the clamp pressing piece crimping of pressing the clamp subassembly respectively with the electrically conductive silk, adjust and press the clamp movable plate and make the electrically conductive silk tensioning, further guarantee the whole even thickness of support polishing, the smooth problem in both ends, adopt the mode that presses the clamp to make blood vessel support centre gripping department not have obvious vestige, promote the periodic rotation electrochemical polishing device to blood vessel support of the yields of product greatly.

In order to solve the problems, the invention provides a periodically rotating electrochemical polishing device for a vascular stent, which comprises an anode mechanical driving mechanism, a driving lever mechanism, a polishing groove, a cathode assembly and the vascular stent, wherein the polishing groove is arranged in the horizontal direction at one end of the anode mechanical driving mechanism, the anode mechanical driving mechanism penetrates through a central shaft of the stent through a conductive wire so as to transversely enter the polishing groove, the driving lever mechanism is arranged at one end of the vascular stent, the driving lever mechanism rotates to touch the stent so as to drive the stent to circumferentially rotate, and the cathode assembly is arranged in the polishing groove.

Preferably, the anode mechanical driving mechanism comprises a servo motor, a lead screw, a sliding seat, a lead screw sliding block, an anode mechanical arm moving part, a clamping component and a conductive wire, wherein the lead screw is arranged at one end of the servo motor and is in transmission connection with the servo motor, the lead screw sliding block is sleeved on the lead screw in a sliding manner, one end of the lead screw sliding block is arranged in a sliding groove of the sliding seat, the anode mechanical arm moving part is fixedly connected to the side end of the lead screw sliding block, a detachable structure is arranged between the anode mechanical arm moving part and the lead screw sliding block, the clamping component is fixedly connected to one end of the anode mechanical arm moving part, and the conductive wire is connected with the positive electrode of the power supply through a.

Preferably, the anode mechanical arm movable portion is divided into three portions, one end of the anode mechanical arm movable portion is provided with a fixed connection portion detachably connected with the screw rod sliding block, one end of the fixed connection portion is provided with a T-shaped bearing portion in a vertical direction, the bottom of the T-shaped bearing portion is provided with a cylindrical support portion, and one end of the cylindrical support portion is fixedly connected with the clamping assembly.

Preferably, the clamping component comprises a clamping fixed plate, a clamping movable plate and a clamping block, the clamping movable plate is arranged at the side end of the clamping fixed plate and fixedly connected through a limiting clamping block, clamping grooves are symmetrically formed in the clamping fixed plate and the clamping movable plate, the clamping block is fixedly arranged in the clamping groove, two ends of the conductive wire are respectively pressed in the clamping grooves through the clamping blocks, and the conductive wire is connected with the positive electrode of the power supply through a metal contact in the clamping fixed plate.

Preferably, the shifting lever mechanism comprises a shifting lever movable swinging arm component, a first swinging movable rod, a second swinging movable rod, a support touch rod and a gear set, the shifting lever movable swinging arm component comprises three parts, a long swinging arm and a short swinging arm are respectively arranged at two ends of the shifting lever movable swinging arm component, a support arm is connected between the long swinging arm and the short swinging arm, one end of the long swinging arm is movably connected with the first swinging movable rod through a pin shaft, one end of the short swinging arm is movably connected with the second swinging movable rod through a pin shaft, the support touch rod is fixedly arranged at the other end of the short swinging arm, and the gear set is respectively arranged at one ends of the first swinging movable rod and the second swinging movable rod and is fixedly connected with the.

Preferably, the gear train includes last driving gear unit and lower driven gear unit, go up driving gear unit and lower driven gear unit and mesh mutually, go up the driving gear unit and locate the second and wave movable rod one end and rather than fixed connection, lower driven gear unit is located first and is waved movable rod one end and rather than fixed connection, it is fixed with manual runner or rotating electrical machines to go up driving gear unit other end, it is connected with the rotating electrical machines transmission to go up the driving gear unit.

Preferably, the cathode assembly is of a transverse netted cylindrical structure and comprises a cathode netted cylindrical anode mechanism open slot and a cathode fixing table, the cathode netted cylinder is provided with an anode mechanism open slot matched with the anode mechanical driving mechanism, the cathode fixing table is of a hollow structure, and the cathode netted cylinder is fixedly arranged at the upper end of the cathode fixing table.

Preferably, the cathode assembly is in a spiral or elongated open configuration.

Preferably, the anode mechanical driving mechanism and the deflector rod mechanism are respectively and electrically connected with the PLC system.

Preferably, the cathode assembly is made of a corrosion-resistant metal material, including but not limited to platinum or gold or copper.

Preferably, the polishing receptacle is made of an insulating or corrosion resistant material, including but not limited to polytetrafluoroethylene or PEEK or polyethylene materials.

Preferably, the outer surface of the toggle mechanism is coated with a corrosion resistant material, including but not limited to polytetrafluoroethylene or polyethylene or polycarbonate or PEEK or polyurethane.

Preferably, the conductive filaments are made of a corrosion resistant metal, including but not limited to platinum or gold or copper.

A polishing method for a vascular stent periodic rotation electrochemical polishing device comprises the following steps:

s1, setting polishing parameters by a PLC system, setting polishing time to be 3-12S, polishing times to be 9-23 times, setting the constant current of the conductive wire to be 0.45-1.7A, and controlling the temperature of the polishing solution to be-20-3 ℃ by controlling heating or cooling;

s2, degreasing and pickling the vascular stent;

s3, penetrating the processed vascular stent on a conductive wire, pressing and clamping the conductive wire at two ends of a pressing and clamping assembly into clamping grooves on a pressing and clamping movable plate respectively through pressing and clamping blocks of the pressing and clamping assembly, adjusting the pressing and clamping movable plate to tension the conductive wire, and in order to adapt to vascular stents with different diameters, an operator manually rotates a rotating wheel and adjusts the extending length of a stent touch rod until the touch rod can smoothly drive the vascular stent to circumferentially rotate and fix the stent touch rod before operation;

s4, starting a polishing program, wherein the PLC system sends a signal to drive a servo motor of the anode mechanical driving mechanism to start, the servo motor drives a lead screw slide block to descend, and the lead screw slide block drives a movable part of an anode mechanical arm, a pressing and clamping component, a conductive wire and a blood vessel bracket to be brought into an anode mechanism open slot of a cathode component in the polishing slot 3 to be polished for 3-12S;

s5, after primary polishing is finished, the PLC system sends a command to drive the servo motor to rotate reversely, and the lead screw slide block drives the anode mechanical arm moving part, the pressing and clamping assembly, the conductive wire and the vascular stent to ascend so as to bring the vascular stent back to the starting point position;

s6, a PLC sends a command to drive a rotating motor of the deflector rod mechanism to start, the rotating motor drives an upper driving gear unit to rotate, the driving gear unit drives a lower driven gear unit to rotate, the lower driven gear unit rotates to drive a first swing movable rod and a long swing arm to swing, the driving gear unit rotates to drive a short swing arm and a second swing movable rod to swing at the same time, and therefore a support touch rod at one end of the short swing arm swings towards one end to touch a vascular support to further drive the vascular support to rotate circumferentially and change the contact position;

s7, automatically repeating the procedures of S4, S5 and S6 for 9-23 times in total to finish polishing;

and S8, finally, detaching the conductive wire, and taking out the blood vessel stent for cleaning.

Adopt above-mentioned structure, its beneficial effect lies in:

the invention comprises an anode mechanical driving mechanism, a deflector rod mechanism, a polishing tank, a cathode component and a vascular stent, wherein the polishing tank is arranged at one end of the anode mechanical driving mechanism in the horizontal direction, the anode mechanical driving mechanism penetrates through a central shaft of the stent through a conductive wire so as to transversely enter the stent into the polishing tank, the problem of uneven two ends of the vascular stent caused by temperature and ion concentration difference at the upper end and the lower end during vertical clamping can be effectively solved by the transverse polishing mode of the stent, the deflector rod mechanism is arranged at one end of the vascular stent, the deflector rod mechanism rotates to touch the stent so as to drive the stent to circumferentially rotate, the cathode component is arranged in the polishing tank, the contact position of the conductive wire and the vascular stent is continuously changed through the deflector rod mechanism, the polishing residue at the contact position is reduced, and the problems of uneven overall thickness of the stent, excessively thin two ends and, the yield is effectively improved, the mechanical automation degree is high, and the labor intensity is greatly reduced.

The anode mechanical driving mechanism comprises a servo motor, a lead screw, a sliding seat, a lead screw sliding block, an anode mechanical arm movable part, a pressing and clamping assembly and a conductive wire, wherein one end of the servo motor is provided with the lead screw and is in transmission connection with the lead screw; the movable part of the anode mechanical arm and the lead screw sliding block are of a detachable structure, and the movable parts of the anode mechanical arm can be changed to adapt to vascular stents with different lengths; the blood vessel support penetrates through the conductive wire, the two ends of the conductive wire are respectively pressed and clamped in the clamping grooves on the pressing and clamping assembly through the pressing and clamping blocks of the pressing and clamping assembly, the pressing and clamping movable plate is adjusted to tension the conductive wire, and the thickness of the whole support polishing is further ensured to be uniform and smooth.

The anode mechanical arm movable part is divided into three parts, one end of the anode mechanical arm movable part is provided with a fixed connection part detachably connected with the screw rod sliding block, one end of the fixed connection part is provided with a T-shaped bearing part in the vertical direction, the bottom of the T-shaped bearing part is provided with a cylindrical supporting part, one end of the cylindrical supporting part is fixedly connected with the clamping assembly, and through multiple effective tests and designs, the design of the anode mechanical arm movable part can further improve the stability of the device during integral conveying, and greatly reduces the risk of the clamping assembly and the vascular stent falling off in the conveying process.

The deflector rod mechanism comprises a deflector rod movable swinging arm component, a first swinging movable rod, a second swinging movable rod, a support touch rod and a gear set, wherein the deflector rod movable swinging arm component comprises three parts, a long swinging arm and a short swinging arm are respectively arranged at two ends of the deflector rod movable swinging arm component, a support arm is connected between the long swinging arm and the short swinging arm, one end of the long swinging arm is movably connected with the first swinging movable rod through a pin shaft, one end of the short swinging arm is movably connected with the second swinging movable rod through a pin shaft, the support touch rod is fixedly arranged at the other end of the short swinging arm, the gear set is respectively arranged at one end of the first swinging movable rod and one end of the second swinging movable rod and is fixedly connected with the first swinging movable rod, the gear set comprises an upper driving gear unit and a lower driven gear unit, the upper driving gear unit is meshed with the lower driven gear unit, the upper driving gear unit is arranged at one end, the other end of the upper driving gear unit is fixedly provided with a manual rotating wheel or a rotating motor, the upper driving gear unit is in transmission connection with the rotating motor, the upper driving gear unit is driven to rotate by a rotating motor or an operator manually rotates a manual rotating wheel to drive the upper driving gear unit to rotate, the driving gear unit drives the lower driven gear unit to rotate, the lower driven gear unit rotates to drive the first swing movable rod and the long swing arm to swing, the driving gear unit rotates to drive the short swing arm and the second swing movable rod to swing at the same time, so that the bracket touch rod at one end of the short swing arm swings to touch the vascular bracket towards one end, thereby driving the intravascular stent to rotate circumferentially, continuously changing the contact position of the conductive wire and the intravascular stent through the deflector rod mechanism, the swing type deflector rod mechanism enables the deflector rod mechanism to adjust the extending length, so that the deflector rod mechanism is suitable for vascular stents with different diameters, and the adaptability is excellent.

The cathode assembly is in a transverse net cylindrical structure or a spiral or strip opening structure, and is suitable for polishing solutions with different structures or different flowability through various different structures.

Drawings

Fig. 1 is a schematic structural diagram of a periodically rotating electrochemical polishing device for a vascular stent.

Fig. 2 is a schematic structural diagram of the anode mechanical driving mechanism.

Fig. 3 is a schematic structural diagram of the shifter lever mechanism.

Fig. 4 is a schematic structural view of a cathode assembly.

Fig. 5 is a block diagram of another embodiment of fig. 4.

Fig. 6 is a block diagram of another embodiment of fig. 4.

Fig. 7 is a schematic view of a polishing method of a periodically rotating electrochemical polishing device for a vascular stent.

In the figure: 1-anode mechanical driving mechanism, 101-servo motor, 102-lead screw, 103-sliding seat, 104-lead screw sliding block, 105-anode mechanical arm movable part, 105-1 fixed connection part, 105-2T type bearing part, 105-3 cylindrical supporting part, 106-clamping component, 106-1 clamping fixed plate, 106-2 clamping movable plate, 106-3 clamping block, 107-conducting wire, 2-deflector rod mechanism, 201-deflector rod movable swinging arm part, 201-1 long swinging arm, 201-2 short swinging arm, 201-3 supporting arm, 202-first swinging movable rod, 203-second swinging movable rod, 204-support touch rod, 205-gear set, 205-1 upper driving gear unit, 205-2 lower driven gear unit, 206-manual rotating wheel, 3-polishing tank, 4-cathode component, 401-cathode mesh cylinder, 402-anode mechanism open slot, 403-cathode fixing table, 5-blood vessel support and 6-PLC system.

Detailed Description

The invention is further explained below with reference to the figures and examples.

The first embodiment is as follows:

this example is a polished nickel-titanium alloy stent with an outer diameter of 1.8mm and a length of 12 mm.

The utility model provides a vascular support's periodic electrochemical polishing device, mainly used vascular support's electrochemical polishing, the device main part includes positive pole mechanical drive mechanism 1, driving lever mechanism 2, polishing groove 3, cathode assembly 4 and vascular support 5, and positive pole mechanical drive mechanism 1 drive vascular support 5 rises and descends, and driving lever mechanism 2 drives vascular support 5 and rotates, and positive pole mechanical drive mechanism 1 selects transverse length to be 30mm, and driving lever mechanism 2 width selection is 10 mm.

The polishing device is characterized in that a polishing groove 3 is horizontally arranged at one end of the anode mechanical driving mechanism 1, the anode mechanical driving mechanism 1 penetrates through a central shaft of the support 5 through a conductive wire to transversely enter the polishing groove 3, the deflector rod mechanism 2 is arranged at one end of the blood vessel support 5, the deflector rod mechanism 2 rotates to touch the support 5 to drive the support to circumferentially rotate, and the cathode assembly 4 is arranged in the polishing groove 3.

The anode mechanical driving mechanism 1 comprises a servo motor 101, a lead screw 102, a sliding seat 103, a lead screw sliding block 104, an anode mechanical arm moving part 105, a clamping component 106 and a conductive wire 107, wherein the lead screw 102 is arranged at one end of the servo motor 101 and is in transmission connection with the servo motor, the lead screw sliding block 104 is in sliding sleeve connection with the lead screw 102, one end of the lead screw sliding block 104 is arranged in a sliding groove of the sliding seat 103, the anode mechanical arm moving part 105 is fixedly connected to the side end of the lead screw sliding block 104, a detachable structure is arranged between the anode mechanical arm moving part 105 and the lead screw sliding block 104, the clamping component 106 is fixedly connected to one end of the anode mechanical arm moving part 105, and the conductive wire 107 is connected with the positive pole of a power supply through a metal.

The anode mechanical arm moving part 105 is divided into three parts, one end of the anode mechanical arm moving part 105 is provided with a fixed connecting part 105-1 detachably connected with the lead screw sliding block 104, one end of the fixed connecting part 105-1 is provided with a T-shaped bearing part 105-2 in the vertical direction, the bottom of the T-shaped bearing part 105-2 is provided with a cylindrical supporting part 105-3, and one end of the cylindrical supporting part 105-3 is fixedly connected with a clamping assembly 106.

The clamping component 106 comprises a clamping fixing plate 106-1, a clamping movable plate 106-2 and a clamping block 106-3, the clamping movable plate 106-2 is arranged at the side end of the clamping fixing plate 106-1 and is fixedly connected with the clamping movable plate 106-2 through a limiting clamping block, clamping grooves are symmetrically formed in the clamping fixing plate 106-1 and the clamping movable plate 106-2, the clamping block 106-3 is fixedly arranged in the clamping grooves, two ends of the conductive wire 107 are respectively pressed in the clamping grooves through the clamping movable plate 106-3, and the conductive wire 107 is connected with the positive electrode of the power supply through a metal contact point in the clamping fixing plate 106-1.

The shifting lever mechanism 2 comprises a shifting lever movable swinging arm piece 201, a first swinging movable rod 202, a second swinging movable rod 203, a support touch rod 204 and a gear set 205, wherein the shifting lever movable swinging arm piece 201 comprises three parts, a long swinging arm 201-1 and a short swinging arm 201-2 are respectively arranged at two ends of the shifting lever movable swinging arm piece 201, a support arm 201-3 is connected between the long swinging arm 201-1 and the short swinging arm 201-2, one end of the long swinging arm 201-1 is movably connected with the first swinging movable rod 202 through a pin shaft, one end of the short swinging arm 201-2 is movably connected with the second swinging movable rod 203 through a pin shaft, the support touch rod 204 is fixedly arranged at the other end of the short swinging arm 201-2, and the gear set 205 is respectively arranged at one end of the first swinging movable rod 202 and the second swinging movable rod 203 and is.

The gear set 205 comprises an upper driving gear unit 205-1 and a lower driven gear unit 205-2, the upper driving gear unit 205-1 is engaged with the lower driven gear unit 205-2, the upper driving gear unit 205-1 is disposed at one end of the second swing movable rod 203 and fixedly connected with the second swing movable rod, the lower driven gear unit 205-2 is disposed at one end of the first swing movable rod 202 and fixedly connected with the first swing movable rod, a manual rotating wheel 206 or a rotating motor is fixedly disposed at the other end of the upper driving gear unit 205-1, and the upper driving gear unit 205-1 is in transmission connection with the rotating motor.

Cathode assembly 4 is the netted drum type structure of horizontal formula, and cathode assembly 4 includes netted drum 401 of cathode positive pole mechanism open slot 402, negative pole fixed station 403, set up the positive pole mechanism open slot 402 with 1 looks adaptation of positive pole mechanical drive mechanism on the netted drum 401 of cathode, negative pole fixed station 403 is the fretwork formula structure, the netted drum 401 of cathode is fixed and is located negative pole fixed station 403 upper end, cathode assembly 4 is screw-tupe or rectangular opening type structure.

The anode mechanical driving mechanism 1 and the deflector rod mechanism 2 are respectively and electrically connected with the PLC system 6.

The polishing method for the vascular stent periodic rotation electrochemical polishing device comprises the following steps:

s1, setting polishing parameters by the PLC system 6, setting polishing time to be 6S, polishing times to be 20 times, setting the constant current of the electrified conductive wire 107 to be 1.2A, and controlling the temperature of the polishing solution to be 0 ℃ by controlling heating or cooling;

s2, degreasing and pickling the blood vessel stent 5;

s3, threading the processed vascular stent on a conductive wire, pressing and clamping the conductive wire on the pressing and clamping assembly 106, and respectively pressing and clamping two ends of the conductive wire in clamping grooves on the pressing and clamping movable plate 106-2 through the pressing and clamping block 106-3 of the pressing and clamping assembly 106, and adjusting the pressing and clamping movable plate 106-2 to tension the conductive wire; in order to adapt to the vascular stents 5 with different diameters, an operator manually rotates the rotating wheel 206 and adjusts the extension length of the stent touch rod 204 before the operation until the touch rod can smoothly drive the vascular stent 5 to circumferentially rotate and fix the stent touch rod 204;

s4, starting a polishing program, wherein the PLC system sends a signal to drive the servo motor 101 of the anode mechanical driving mechanism 1 to start, the servo motor 101 drives the lead screw sliding block 104 to descend, and the lead screw sliding block 104 drives the anode mechanical arm moving part 105, the pressing and clamping component 106, the conductive wire 107 and the blood vessel support 5 to be brought into the anode mechanism opening groove 402 of the cathode component 4 in the polishing groove 3 for polishing for 6S;

s5, after primary polishing is finished, the PLC system 6 sends a command to drive the servo motor 101 to rotate reversely, and the lead screw slide block 104 drives the anode mechanical arm moving part 105, the pressing and clamping component 106, the conductive wire 107 and the blood vessel support 5 to ascend so as to bring the blood vessel support 5 back to the starting position;

s6, then the PLC shift lever mechanism 2 sends a command to drive a rotating motor of the shift lever mechanism 2 to start, the rotating motor drives an upper driving gear unit 205-1 to rotate, the driving gear unit 205-1 drives a lower driven gear unit 205-2 to rotate, the lower driven gear unit 205-2 rotates to drive a first swing movable rod 202 and a long swing arm 201-1 to swing, the driving gear unit 205-1 rotates and simultaneously drives a short swing arm 201-2 and a second swing movable rod 203 to swing, so that a stent touch rod 204 at one end of the short swing arm 201-2 swings to touch a vascular stent 5 towards one end, and further drives the vascular stent 5 to rotate circumferentially to change the contact position;

s7, followed by repeating S4, S5, S6 a total of 20 times, completing polishing;

s8, finally, the conductive wire 107 is detached, and the blood vessel bracket 5 is taken out for cleaning.

Example two: this example is a polished 3.0mm outer diameter, 30mm long nitinol stent.

In this embodiment, the anode mechanical driving mechanism 1 is replaced with a specification of 35mm in transverse length and 20mm in width of the shifter lever mechanism 2, and the manual rotating wheel 206 is rotated to adjust the extending length of the stent touch rod 204, so that the stent 5 can be shifted smoothly.

The polishing method for the vascular stent periodic rotation electrochemical polishing device comprises the following steps:

s1, setting polishing parameters by the PLC system 6, setting polishing time to be 4S, polishing times to be 15 times, setting the constant current of the electrified conductive wire 107 to be 1.0A, and controlling the temperature of the polishing solution to be-5 ℃ by controlling heating or cooling;

s4, starting a polishing program, wherein the PLC system sends a signal to drive the servo motor 101 of the anode mechanical driving mechanism 1 to start, the servo motor 101 drives the lead screw sliding block 104 to descend, and the lead screw sliding block 104 drives the anode mechanical arm moving part 105, the pressing and clamping component 106, the conductive wire 107 and the blood vessel support 5 to be brought into the anode mechanism opening groove 402 of the cathode component 4 in the polishing groove 3 for polishing for 4S;

s7, repeating S4, S5 and S6 for 15 times to finish polishing, and the rest technical scheme is the same as the first embodiment.

Example three: this example is a polished nickel-titanium alloy stent with an outer diameter of 2.0 and a length of 20 mm.

In this embodiment, the specification of the robot arm is the same as that in the second embodiment.

The polishing method for the vascular stent periodic rotation electrochemical polishing device comprises the following steps:

s1, setting polishing parameters by the PLC system 6, setting polishing time to be 8S, polishing times to be 12 times, setting the constant current of the electrified conductive wire 107 to be 0.8A, and controlling the temperature of the polishing solution to be-15 ℃ by controlling heating or cooling;

s4, starting a polishing program, wherein the PLC system sends a signal to drive the servo motor 101 of the anode mechanical driving mechanism 1 to start, the servo motor 101 drives the lead screw sliding block 104 to descend, and the lead screw sliding block 104 drives the anode mechanical arm moving part 105, the pressing and clamping component 106, the conductive wire 107 and the blood vessel support 5 to be brought into the anode mechanism opening groove 402 of the cathode component 4 in the polishing groove 3 for polishing for 8S;

s7, repeating S4, S5 and S6 for 12 times, and finishing the polishing, wherein the rest technical scheme is the same as the first embodiment.

The above-mentioned applications of the periodical electrochemical polishing device for vascular stents are only three applications of the periodical electrochemical polishing device for vascular stents, and should not be considered as limiting the scope of the present invention, and all equivalent variations and modifications made within the scope of the claims of the present invention should fall within the scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "end", "side", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a group" or "a plurality" means two or more unless specifically defined otherwise.

While there have been shown and described what are at present considered to be the essential features of the invention and advantages thereof, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (10)

1. The utility model provides a to vascular support periodic rotation electrochemical polishing device which characterized in that: including positive pole mechanical drive mechanism (1), driving lever mechanism (2), polishing groove (3), negative pole subassembly (4) and blood vessel support (5), positive pole mechanical drive mechanism (1) one end horizontal direction is provided with polishing groove (3), thereby positive pole mechanical drive mechanism (1) passes support (5) center pin through the conducting wire and gets into polishing groove (3) with its horizontal, blood vessel support (5) one end is located in driving lever mechanism (2), driving lever mechanism (2) rotate touching support (5) and then drive its circumferential direction, negative pole subassembly (4) are located in polishing groove (3).

2. The device of claim 1, wherein: the anode mechanical driving mechanism (1) comprises a servo motor (101), a lead screw (102), a sliding seat (103), a lead screw sliding block (104), an anode mechanical arm movable part (105), a pressing and clamping assembly (106) and a conductive wire (107), one end of the servo motor (101) is provided with a screw rod (102) and is in transmission connection with the screw rod, the screw rod sliding block (104) is sleeved on the screw rod (102) in a sliding way, one end of the screw rod sliding block (104) is arranged in a sliding groove of the sliding seat (103), an anode mechanical arm movable part (105) is fixedly connected with the side end of the screw rod sliding block (104), a detachable structure is arranged between the anode mechanical arm movable part (105) and the lead screw sliding block (104), one end of the anode mechanical arm movable part (105) is fixedly connected with a clamping component (106), the conductive wire (107) is connected with the positive electrode of the power supply through a metal contact inside the pressing and clamping assembly (106).

3. The device of claim 2, wherein: the anode mechanical arm comprises three movable parts (105), one end of each movable part is provided with a fixed connection part (105-1) detachably connected with a screw rod sliding block (104), one end of each fixed connection part (105-1) is provided with a T-shaped bearing part (105-2) in the vertical direction, the bottom of each T-shaped bearing part (105-2) is provided with a cylindrical supporting part (105-3), and one end of each cylindrical supporting part (105-3) is fixedly connected with a clamping assembly (106).

4. The device of claim 3, wherein: the clamping component (106) comprises a clamping fixing plate (106-1), a clamping moving plate (106-2) and a clamping block (106-3), the clamping moving plate (106-2) is arranged at the side end of the clamping fixing plate (106-1) and fixedly connected through a limiting clamping block, clamping grooves are symmetrically formed in the clamping fixing plate (106-1) and the clamping moving plate (106-2), the clamping block (106-3) is fixedly arranged in the clamping grooves, two ends of the conductive wire (107) are respectively pressed in the clamping grooves through the clamping block (106-3), and the conductive wire (107) is connected with a positive electrode of a power supply through a metal contact inside the clamping fixing plate (106-1).

5. The device of claim 1, wherein: the poking rod mechanism (2) comprises a poking rod movable swinging arm piece (201), a first swinging movable rod (202), a second swinging movable rod (203), a support touch rod (204) and a gear set (205), wherein the poking rod movable swinging arm piece (201) comprises three parts, a long swinging arm (201-1) and a short swinging arm (201-2) are respectively arranged at two ends of the poking rod movable swinging arm piece (201), a supporting arm (201-3) is connected between the long swinging arm (201-1) and the short swinging arm (201-2), one end of the long swinging arm (201-1) is movably connected with the first swinging movable rod (202) through a pin shaft, one end of the short swinging arm (201-2) is movably connected with the second swinging movable rod (203) through a pin shaft, the support touch rod (204) is fixedly arranged at the other end of the short swinging arm (201-2), and the gear set (205) is respectively arranged on the first swinging movable, One end of the second swing movable rod (203) is fixedly connected with the second swing movable rod.

6. The device of claim 5, wherein: the gear set (205) comprises an upper driving gear unit (205-1) and a lower driven gear unit (205-2), the upper driving gear unit (205-1) is meshed with the lower driven gear unit (205-2), the upper driving gear unit (205-1) is arranged at one end of a second swing movable rod (203) and fixedly connected with the second swing movable rod, the lower driven gear unit (205-2) is arranged at one end of a first swing movable rod (202) and fixedly connected with the first swing movable rod, a manual rotating wheel (206) or a rotating motor is fixedly arranged at the other end of the upper driving gear unit (205-1), and the upper driving gear unit (205-1) is in transmission connection with the rotating motor.

7. The device of claim 1, wherein: cathode assembly (4) are the netted cylindric type structure of horizontal formula, and cathode assembly (4) include negative pole netted drum (401) positive pole mechanism open slot (402), negative pole fixed station (403), set up on the netted drum of negative pole (401) with positive pole mechanical drive mechanism (1) looks adaptation positive pole mechanism open slot (402), negative pole fixed station (403) are fretwork formula structure, negative pole netted drum (401) are fixed and are located negative pole fixed station (403) upper end.

8. The device of claim 1, wherein: the cathode assembly (4) is of a spiral or strip opening type structure.

9. The device of claim 1, wherein: the anode mechanical driving mechanism (1) and the deflector rod mechanism (2) are respectively and electrically connected with a PLC system (6), and the model of the PLC system is Mitsubishi FX3SA-20 MT-CM.

10. A polishing method for a vascular stent periodic rotation electrochemical polishing device is characterized in that: the method comprises the following steps:

s1, setting polishing parameters by a PLC (6) system, setting polishing time to be 3-12S, polishing times to be 9-23, setting the constant current of the conductive wire (107) to be 0.45-1.7A, and controlling the temperature of the polishing solution to be-20-3 ℃ by controlling heating or cooling;

s2, degreasing and pickling the blood vessel stent (5);

s3, penetrating the processed vascular stent (5) on a conductive wire, pressing and clamping the conductive wire on a pressing and clamping assembly (106), pressing and clamping two ends of the conductive wire in clamping grooves on a pressing and clamping movable plate (106-2) through pressing and clamping blocks (106-3) of the pressing and clamping assembly (106), adjusting the pressing and clamping movable plate (106-2) to tension the conductive wire, and manually rotating a rotating wheel (206) and adjusting the extending length of a stent touch rod (204) until the touch rod can smoothly drive the vascular stent (5) to circumferentially rotate and fix the stent touch rod (204) before operation so as to adapt to vascular stents (5) with different diameters;

s4, starting a polishing program, wherein a PLC system sends a signal to drive a servo motor (101) of an anode mechanical driving mechanism (1) to start, the servo motor (101) drives a lead screw sliding block (104) to descend, and the lead screw sliding block (104) drives an anode mechanical arm moving part (105), a pressing and clamping assembly (106), a conductive wire (107) and a blood vessel support (5) to be brought into an anode mechanism open slot (402) of a cathode assembly (4) in a polishing slot 3 to be polished for 3-12S;

s5, after primary polishing is finished, the PLC system (6) sends a command to drive the servo motor (101) to rotate reversely, and the lead screw sliding block (104) drives the anode mechanical arm moving part (105), the pressing and clamping assembly (106), the conductive wire (107) and the blood vessel support (5) to ascend, so that the blood vessel support (5) is brought back to the starting point position;

s6, the PLC sends a command to drive a rotating motor of the deflector rod mechanism (2) to start, the rotating motor drives an upper driving gear unit (205-1) to rotate, the driving gear unit (205-1) drives a lower driven gear unit (205-2) to rotate, the lower driven gear unit (205-2) rotates to drive a first swing movable rod (202) and a long swing arm (201-1) to swing, the driving gear unit (205-1) rotates and simultaneously drives a short swing arm (201-2) and a second swing movable rod (203) to swing, so that a support touch rod (204) at one end of the short swing arm (201-2) swings to one end to touch a vascular support (5), the vascular support (5) is driven to rotate circumferentially, and the contact position is changed;

s7, automatically repeating the procedures of S4, S5 and S6 for 9-23 times in total to finish polishing;

s8, finally, the conductive wire (107) is detached, and the blood vessel support (5) is taken out for cleaning.

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