CN115300762A - Manufacturing process of superfine multi-strand memory alloy guide wire - Google Patents
Manufacturing process of superfine multi-strand memory alloy guide wire Download PDFInfo
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- CN115300762A CN115300762A CN202211049291.4A CN202211049291A CN115300762A CN 115300762 A CN115300762 A CN 115300762A CN 202211049291 A CN202211049291 A CN 202211049291A CN 115300762 A CN115300762 A CN 115300762A
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- 229910001285 shape-memory alloy Inorganic materials 0.000 title claims abstract description 143
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- HZEWFHLRYVTOIW-UHFFFAOYSA-N [Ti].[Ni] Chemical compound [Ti].[Ni] HZEWFHLRYVTOIW-UHFFFAOYSA-N 0.000 claims abstract description 94
- 238000010438 heat treatment Methods 0.000 claims abstract description 28
- 238000007493 shaping process Methods 0.000 claims abstract description 27
- 238000003466 welding Methods 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 16
- 230000008569 process Effects 0.000 claims abstract description 16
- 238000005520 cutting process Methods 0.000 claims abstract description 10
- 238000005728 strengthening Methods 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims description 17
- 239000011248 coating agent Substances 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 10
- -1 polytetrafluoroethylene Polymers 0.000 claims description 10
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 10
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 10
- 238000002791 soaking Methods 0.000 claims description 10
- 238000004140 cleaning Methods 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 238000004093 laser heating Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 210000004351 coronary vessel Anatomy 0.000 abstract description 3
- 238000005452 bending Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000002560 therapeutic procedure Methods 0.000 abstract description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 6
- 230000007704 transition Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 208000002740 Muscle Rigidity Diseases 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 229910052697 platinum Inorganic materials 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 210000004204 blood vessel Anatomy 0.000 description 2
- 230000000747 cardiac effect Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- 239000010963 304 stainless steel Substances 0.000 description 1
- 206010011086 Coronary artery occlusion Diseases 0.000 description 1
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000001256 tonic effect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F45/00—Wire-working in the manufacture of other particular articles
- B21F45/008—Wire-working in the manufacture of other particular articles of medical instruments, e.g. stents, corneal rings
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/09—Guide wires
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F11/00—Cutting wire
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F7/00—Twisting wire; Twisting wire together
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/525—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length for wire, for rods
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2207/00—Methods of manufacture, assembly or production
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- Chemical & Material Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
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- General Health & Medical Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Vascular Medicine (AREA)
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Abstract
The invention discloses a manufacturing process of an ultra-fine multi-strand memory alloy guide wire, which comprises the following steps: 1. selecting a plurality of titanium-nickel base memory alloy wires for strengthening; 2. selecting a plurality of titanium-nickel-based memory alloy wires subjected to strengthening treatment, and arranging the titanium-nickel-based memory alloy wires in a circumferential array mode, wherein one ends of the titanium-nickel-based memory alloy wires are flush with each other; 3. drawing a plurality of wires, enabling each wire to rotate along the central axis of the wire in the drawing process, and simultaneously revolving along the central axis of the circumferential array, so that the plurality of wires are twisted together; 4. carrying out three-section heat treatment and shaping on the twisted wire; 5. cutting the shaped twisted wire to obtain a core wire of the guide wire; 6. and welding one end of the guide wire core wire to the guide wire distal end component, and welding the other end of the guide wire core wire to the push rod. Has the beneficial effects that: the ultra-fine multistrand memory alloy guide wire manufactured by the process has the advantages of accurate and smooth appearance size, good conduction performance of tension and moment and high flexible bending degree; and meets the requirements for implementing stent interventional therapy of the heart coronary artery CTO.
Description
Technical Field
The invention relates to the field of medical surgery, in particular to a manufacturing process of an ultra-fine multistrand memory alloy guide wire.
Background
The guide wire is also a guide wire, which is one of the main tools of the percutaneous puncture cannula. The guide wire plays a role in guiding and supporting the catheter, helps the catheter enter blood vessels and other cavities, and guides the catheter to smoothly reach a lesion.
The existing guide wire is mostly made of a single-stranded stainless steel wire with the diameter larger than 0.3mm, and the grade of the stainless steel is 304 stainless steel. Due to the limitation of the material and the diameter, the defects of poor force and torque transmission and difficult operation exist. Particularly, when CTO (cardiac coronary artery occlusion) occurs in a coronary artery of a heart, interventional stent treatment cannot be implemented by using the conventional guide wire, so that the operation of a thoracotomy bypass surgery can only be implemented on a patient.
The existing guide wire also has the problems of poor flexibility, poor trafficability to a bent pipeline, easy puncture of blood vessels to cause false cavities and injury to other human tissues. Especially when the rotation angle is less than 90 degrees, the guide wire can not be basically folded, the difference of positive and negative torques is large, and the surgical occasion that the guide wire has no length deformation and torsion change can not be completed.
Disclosure of Invention
In order to solve the problems, the invention provides a manufacturing process of an ultra-fine multistrand memory alloy guide wire.
The invention is realized by the following technical scheme:
a manufacturing process of an ultra-fine multi-strand memory alloy guide wire comprises the following steps:
1.1, selecting a plurality of titanium-nickel-based memory alloy wires, respectively drawing the wires into a linear state, keeping the wires in a rigid state for 5-10 minutes at the temperature of 300-400 ℃, and then cooling the wires to room temperature for later use;
1.2 selecting x titanium-nickel-based memory alloy wires subjected to strengthening treatment, arranging the wires in a circumferential array mode, and enabling one ends of the wires to be flush with each other; wherein x is a positive integer greater than or equal to 4;
1.3, drawing one end of x titanium nickel-based memory alloy wires which are level, wherein the drawing direction is the axial direction of the titanium nickel-based memory alloy wires, and in the drawing process, enabling each titanium nickel-based memory alloy wire to rotate along the central axis of the wire and revolve along the central axis of the circumferential array, so that the x titanium nickel-based memory alloy wires are twisted together, and obtaining a twisted wire with a hollow structure; wherein, the rotation direction of the rotation is the same as the revolution direction;
1.4, carrying out three-section heat treatment setting on the twisted wire;
1.5 cutting the shaped twisted wire rod according to the length of 1000mm-3000mm to obtain a core wire rod of a guide wire, wherein the core wire rod is a support section of the guide wire;
1.6 welding one end of the guide wire core wire to the guide wire distal end component, and welding the other end of the guide wire core wire to the push rod to obtain the superfine multi-strand memory alloy guide wire.
A manufacturing process of an ultra-fine multi-strand memory alloy guide wire comprises the following steps:
2.1 selecting a plurality of titanium-nickel-based memory alloy wires, respectively drawing the wires into a linear state, keeping the wires in a rigid state for 5-10 minutes at the temperature of 300-400 ℃, and then cooling the wires to room temperature for later use;
2.2 selecting n + m strong-processed titanium-nickel-based memory alloy wires, arranging the wires in a circumferential array mode to form a concentric circle structure with n inner circles and m outer circles, and enabling one ends of the concentric circle structure to be flush with each other; wherein 2 xn = m, n being a positive integer greater than or equal to 4;
2.3, drawing one end of n + m titanium-nickel-based memory alloy wires which are flush, wherein the drawing direction is the axial direction of the titanium-nickel-based memory alloy wires, enabling each titanium-nickel-based memory alloy wire to rotate along the central axis of the titanium-nickel-based memory alloy wire in the drawing process, and revolving along the central axis of the circumferential array, so that the n + m titanium-nickel-based memory alloy wires are twisted together, and obtaining a hollow twisted wire which is of a double-layer structure; the rotation direction of the inner ring is the same as the rotation direction of the outer ring, and the rotation direction of the inner ring is opposite to the rotation direction of the outer ring;
2.4, carrying out three-section heat treatment setting on the twisted wire;
2.5 cutting the shaped twisted wire rod according to the length of 1500mm-2500mm to obtain a core wire rod of a guide wire, wherein the core wire rod is a support section of the guide wire;
2.6 welding one end of the guide wire core wire to the guide wire distal end component, and welding the other end of the guide wire core wire to the push rod to obtain the ultrafine multi-strand memory alloy guide wire.
A manufacturing process of an ultra-fine multi-strand memory alloy guide wire comprises the following steps:
3.1 selecting a plurality of titanium-nickel-based memory alloy wires, respectively drawing the wires into a linear state, keeping the wires in a rigid state for 5-10 minutes at the temperature of 300-400 ℃, and then cooling the wires to room temperature for later use;
3.2 selecting o + p + q titanium-nickel-based memory alloy wires subjected to strengthening treatment, and arranging the wires in a circumferential array mode to form concentric circle structures with o inner rings, p middle rings and q outer rings, wherein one ends of the concentric circle structures are flush with one another; wherein 4 × o =2 × p = q, o is a positive integer equal to or greater than 4;
3.3 drawing one end of the o + p + q titanium-nickel-based memory alloy wires which are leveled, wherein the drawing direction is the axial direction of the titanium-nickel-based memory alloy wires, each titanium-nickel-based memory alloy wire rotates along the central axis of the titanium-nickel-based memory alloy wire in the drawing process, and simultaneously revolves along the central axis of the circumferential array, so that the o + p + q titanium-nickel-based memory alloy wires are twisted together, and the twisted wire which is hollow and has a three-layer structure is obtained; the rotation direction of the inner ring is the same as that of the revolution, the rotation direction of the middle ring is the same as that of the revolution, the rotation direction of the outer ring is the same as that of the revolution, the rotation direction of the inner ring is opposite to that of the middle ring, and the rotation direction of the inner ring is the same as that of the outer ring;
3.4, carrying out three-section heat treatment setting on the twisted wire;
3.5 cutting the shaped twisted wire rod according to the length of 1500mm-2500mm to obtain a core wire rod of a section of guide wire, wherein the core wire rod is a support section of the guide wire;
3.6 welding one end of the guide wire core wire rod to the distal end component of the guide wire, and welding the other end of the guide wire core wire rod to the push rod to obtain the superfine multi-strand memory alloy guide wire.
Preferably, the diameter of the titanium-nickel-based memory alloy wire is 0.01-0.03mm.
Preferably, the three-stage heat treatment setting is to draw the twisted wire, perform heat treatment setting in a three-stage hot box, and then cool the twisted wire to room temperature; the three-section type heating box is a far infrared or laser heating box, the temperature of the inlet end of the heating box is 167 ℃, the temperature of the middle section of the heating box is 199.5 ℃, and the temperature of the outlet end of the heating box is 232 ℃; the time from the entering of any point of the twisted wire into the three-section hot box to the leaving of any point of the twisted wire is 6 to 8 minutes.
Preferably, when the titanium-nickel-based memory alloy wire rod rotates and revolves, the rotation torque is 6.7N · m, the revolution torque is 17.3N · m, and the traction force is 212N.
Preferably, the ultrafine stranded memory alloy guide wire welded with the guide wire distal end member and the push rod is provided with a post-treatment step, and the post-treatment step comprises the following steps:
a. soaking the ultramicro fine multistrand memory alloy guide wires in a polytetrafluoroethylene solution for soaking treatment, so that the surfaces of the guide wires are uniformly covered with a polytetrafluoroethylene coating;
b. then placing the mixture into an oven, baking at 160-190 ℃, and naturally cooling for 12-20 minutes;
b. repeating the steps for 1-2 times to obtain the coating ultrafine multi-strand memory alloy guide wire;
d. cleaning the coated superfine multi-strand memory alloy guide wire for 1-2 times by using an ultrasonic cleaner and then completely drying;
e. then the sterilized products are sterilized completely by irradiation and then are aseptically packaged and put in storage.
The invention has the beneficial effects that: the ultra-fine multistrand memory alloy guide wire manufactured by the process has the advantages of precise and smooth overall dimension, good conduction performance of tension and torque, and capability of ensuring that the elastic deformation is approximately equal to zero under the action of ultimate working tension and torque; the flexible bending within the radius of 0.5mm can reach 90-180 degrees; and meets the requirements for implementing stent interventional therapy of the cardiac coronary artery CTO.
Drawings
FIG. 1: the invention embodiment 1 is a structural schematic diagram of an ultra-fine multi-strand memory alloy guide wire;
FIG. 2 is a schematic diagram: the embodiment 2 of the invention is a schematic structural diagram of an ultra-fine multistrand memory alloy guide wire;
FIG. 3: embodiment 3 of the invention is a structural schematic diagram of an ultra-fine multi-strand memory alloy guide wire.
Detailed Description
The invention is further described with reference to the following figures and detailed description:
example 1: a manufacturing process of an ultra-fine multi-strand memory alloy guide wire comprises the following steps:
1. selecting a plurality of titanium-nickel-based memory alloy wires with the diameter of 0.02mm, respectively drawing the titanium-nickel-based memory alloy wires into a linear state, keeping the titanium-nickel-based memory alloy wires in a rigid state for 8 minutes at the temperature of 350 ℃, and then cooling the titanium-nickel-based memory alloy wires to room temperature for later use;
2. selecting 4 titanium-nickel-based memory alloy wires subjected to strong rigidity treatment, arranging the wires in a circumferential array mode, and enabling one ends of the wires to be flush with each other;
3. drawing one end of the 4 titanium-nickel-based memory alloy wires which are leveled, wherein the drawing direction is the axial direction of the titanium-nickel-based memory alloy wires, and in the drawing process, each titanium-nickel-based memory alloy wire rotates along the central axis of the titanium-nickel-based memory alloy wire and simultaneously revolves along the central axis of the circumferential array, so that the 4 titanium-nickel-based memory alloy wires are twisted together to obtain a twisted wire with a hollow structure;
wherein, the rotation direction of rotation is the same as the revolution direction, the rotation torque is 6.7 N.m, the revolution torque is 17.3 N.m, and the traction force is 212N; because the titanium-nickel-based memory alloy wire rods rotate to generate torsional stress and the combined movement of revolution, a plurality of the titanium-nickel-based memory alloy wire rods can be twisted together to form a multi-strand single rope;
4. carrying out three-stage heat treatment and shaping on the twisted wire; the three-stage heat treatment shaping process comprises the steps of drawing the twisted wire, carrying out heat treatment shaping through a three-stage hot box, and then cooling to room temperature; the three-section type heating box is a far infrared or laser heating box, the temperature of the inlet end of the heating box is 167 ℃, the temperature of the middle section of the heating box is 199.5 ℃, and the temperature of the outlet end of the heating box is 232 ℃; the time from the entering of any point of the twisted wire into the three-section type hot box to the leaving of any point of the twisted wire is 8 minutes;
5. cutting the shaped twisted wire rod according to the length of 1500mm to obtain a section of core wire rod of the guide wire, wherein the core wire rod is a support section of the guide wire;
6. welding one end of a guide wire core wire rod to a guide wire distal end component, and welding the other end of the guide wire core wire rod to a push rod to obtain the superfine multi-strand memory alloy guide wire;
the far-end component comprises a guide wire transition section, a guide wire shaping belt, a guide wire guide head and a developing coil, and the far-end component and the guide wire core wire are coaxially arranged; the transition section is in a conical tapered circular truncated cone structure, one end with larger diameter is connected with the guide wire core wire, and the other end is connected with the shaping belt; the outer side of the circumferential surface of the shaping belt is connected with a developing coil made of platinum, and the end part of the shaping belt is connected with a guide head;
7. carrying out post-treatment by the following steps: a. soaking the ultramicro fine multistrand memory alloy guide wires in a polytetrafluoroethylene solution for soaking treatment, so that the surfaces of the guide wires are uniformly covered with a polytetrafluoroethylene coating;
b. then placing the mixture into an oven, baking at 180 ℃, and naturally cooling for 18 minutes;
c. repeating the step for 1 time to obtain the coating ultramicro multistrand memory alloy guide wire;
d. cleaning the coated superfine multi-strand memory alloy guide wire for 2 times by using an ultrasonic cleaner and then completely drying;
e. then the sterilized products are sterilized completely by irradiation and then are aseptically packaged and stored.
Example 2: a manufacturing process of an ultra-fine multistrand memory alloy guide wire comprises the following steps:
1. selecting a plurality of titanium-nickel-based memory alloy wires with the diameter of 0.02mm, respectively drawing the titanium-nickel-based memory alloy wires into a linear state, keeping the titanium-nickel-based memory alloy wires in a rigid state for 8 minutes at the temperature of 350 ℃, and then cooling the titanium-nickel-based memory alloy wires to room temperature for later use;
2. selecting 12 titanium-nickel-based memory alloy wires subjected to strong rigidity treatment, and arranging the wires in a circumferential array mode to form a concentric circle structure with 4 inner rings and 8 outer rings, wherein one ends of the concentric circle structure are flush with each other;
3. drawing one end of the 12 titanium-nickel-based memory alloy wires which are leveled, wherein the drawing direction is the axial direction of the titanium-nickel-based memory alloy wires, and in the drawing process, each titanium-nickel-based memory alloy wire rotates along the central axis of the titanium-nickel-based memory alloy wire and simultaneously revolves along the central axis of the circumferential array, so that the 12 titanium-nickel-based memory alloy wires are twisted together to obtain a twisted wire with a hollow structure;
the rotation direction of the inner ring is the same as the rotation direction of the outer ring, and the rotation direction of the inner ring is opposite to the rotation direction of the outer ring; the rotation torque is 6.7 N.m, the revolution torque is 17.3 N.m, and the traction force is 212N; because the titanium-nickel-based memory alloy wire rods rotate to generate torsional stress and the combined movement of revolution, a plurality of the titanium-nickel-based memory alloy wire rods can be twisted together to form a multi-strand double-layer single rope;
4. carrying out three-stage heat treatment and shaping on the twisted wire; the three-stage heat treatment shaping process comprises the steps of drawing the twisted wire, carrying out heat treatment shaping in a three-stage hot box, and then cooling to room temperature; the three-section type heat box is a far infrared ray or laser heating box, the temperature of the inlet end of the heat box is 167 ℃, the temperature of the middle section of the heat box is 199.5 ℃, and the temperature of the outlet end of the heat box is 232 ℃; the time from the entering of any point of the twisted wire into the three-section type hot box to the leaving of any point of the twisted wire is 8 minutes;
5. cutting the shaped twisted wire rod according to the length of 1500mm to obtain a section of core wire rod of the guide wire, wherein the core wire rod is a support section of the guide wire;
6. welding one end of a guide wire core wire rod to a guide wire distal end component, and welding the other end of the guide wire core wire rod to a push rod to obtain the ultrafine multi-strand memory alloy guide wire;
the far-end component comprises a guide wire transition section, a guide wire shaping belt, a guide wire guide head and a developing coil, and the far-end component and the guide wire core wire are coaxially arranged; the transition section is in a conical tapered circular truncated cone structure, one end with larger diameter is connected with the guide wire core wire, and the other end is connected with the shaping belt; the outer side of the circumferential surface of the shaping belt is connected with a developing coil made of platinum, and the end part of the shaping belt is connected with a guide head;
7. carrying out post-treatment, comprising the following steps: a. soaking the ultramicro fine multistrand memory alloy guide wires in a polytetrafluoroethylene solution for soaking treatment, so that the surfaces of the guide wires are uniformly covered with a polytetrafluoroethylene coating;
b. then placing the mixture into an oven, baking at 180 ℃, and naturally cooling for 18 minutes;
c. repeating the step for 1 time to obtain the coating ultramicro multistrand memory alloy guide wire;
d. cleaning the coated superfine multi-strand memory alloy guide wire for 2 times by using an ultrasonic cleaner and then completely drying;
e. then the sterilized products are sterilized completely by irradiation and then are aseptically packaged and put in storage.
Example 3: a manufacturing process of an ultra-fine multi-strand memory alloy guide wire comprises the following steps:
1. selecting a plurality of titanium-nickel-based memory alloy wires with the diameter of 0.02mm, respectively drawing the titanium-nickel-based memory alloy wires into a linear state, keeping the titanium-nickel-based memory alloy wires in a tonic state for 8 minutes at 350 ℃, and then cooling the titanium-nickel-based memory alloy wires to room temperature for later use;
2. selecting 28 titanium-nickel-based memory alloy wires subjected to strong rigidity treatment, and arranging the wires in a circumferential array manner to form a concentric circle structure with 4 inner circles, 8 middle circles and 16 outer circles, wherein one ends of the concentric circle structure are flush with one another;
3. drawing one end of the 28 titanium-nickel-based memory alloy wires which are leveled, wherein the drawing direction is the axial direction of the titanium-nickel-based memory alloy wires, and in the drawing process, each titanium-nickel-based memory alloy wire rotates along the central axis of the titanium-nickel-based memory alloy wire and simultaneously revolves along the central axis of the circumferential array, so that the 28 titanium-nickel-based memory alloy wires are twisted together to obtain a twisted wire with a hollow structure;
the rotation direction of the inner ring is the same as the rotation direction of the revolution, the rotation direction of the middle ring is the same as the rotation direction of the revolution, the rotation direction of the outer ring is the same as the rotation direction of the revolution, the rotation direction of the inner ring is opposite to that of the middle ring, and the rotation direction of the inner ring is the same as that of the outer ring; the rotation torque is 6.7 N.m, the revolution torque is 17.3 N.m, and the traction force is 212N; because the titanium-nickel-based memory alloy wire rods rotate to generate torsional stress and the revolution compound motion is added, a plurality of titanium-nickel-based memory alloy wire rods can be twisted together to form a multi-strand three-layer single rope;
4. carrying out three-stage heat treatment and shaping on the twisted wire; the three-stage heat treatment shaping process comprises the steps of drawing the twisted wire, carrying out heat treatment shaping through a three-stage hot box, and then cooling to room temperature; the three-section type heat box is a far infrared ray or laser heating box, the temperature of the inlet end of the heat box is 167 ℃, the temperature of the middle section of the heat box is 199.5 ℃, and the temperature of the outlet end of the heat box is 232 ℃; the time from the entering of any point of the twisted wire into the three-section type hot box to the leaving of any point of the twisted wire is 8 minutes;
5. cutting the shaped twisted wire rod according to the length of 1500mm to obtain a section of core wire rod of the guide wire, wherein the core wire rod is a support section of the guide wire;
6. welding one end of a guide wire core wire rod to a guide wire distal end component, and welding the other end of the guide wire core wire rod to a push rod to obtain the superfine multi-strand memory alloy guide wire;
the far-end component comprises a guide wire transition section, a guide wire shaping belt, a guide wire guide head and a developing coil, and the far-end component and the guide wire core wire are coaxially arranged; the transition section is in a conical tapered round platform structure, one end with larger diameter is connected with the guide wire core wire, and the other end is connected with the shaping belt; the outer side of the circumferential surface of the shaping belt is connected with a developing coil made of platinum, and the end part of the shaping belt is connected with a guide head;
7. carrying out post-treatment by the following steps: a. soaking the ultramicro fine multistrand memory alloy guide wires in a polytetrafluoroethylene solution for soaking treatment, so that the surfaces of the guide wires are uniformly covered with a polytetrafluoroethylene coating;
b. then placing the mixture into an oven, baking at 180 ℃, and naturally cooling for 18 minutes;
c. repeating the step for 1 time to obtain the coating ultramicro multistrand memory alloy guide wire;
d. cleaning the coated superfine multi-strand memory alloy guide wire for 2 times by using an ultrasonic cleaner, and then completely drying;
e. then the sterilized products are sterilized completely by irradiation and then are aseptically packaged and put in storage.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (7)
1. A manufacturing process of an ultra-fine multistrand memory alloy guide wire is characterized by comprising the following steps:
selecting a plurality of titanium-nickel-based memory alloy wires, respectively drawing the titanium-nickel-based memory alloy wires into a linear state, keeping the titanium-nickel-based memory alloy wires in a rigid state for 5-10 minutes at the temperature of 300-400 ℃, and then cooling the titanium-nickel-based memory alloy wires to room temperature for later use;
selecting x titanium-nickel-based memory alloy wires subjected to strengthening treatment, and arranging the wires in a circumferential array mode, wherein one ends of the wires are flush with each other; wherein x is a positive integer greater than or equal to 4;
drawing one end of the x titanium-nickel-based memory alloy wires which are leveled, wherein the drawing direction is the axial direction of the titanium-nickel-based memory alloy wires, and in the drawing process, each titanium-nickel-based memory alloy wire rotates along the central axis of the titanium-nickel-based memory alloy wire and simultaneously revolves along the central axis of the circumferential array, so that the x titanium-nickel-based memory alloy wires are twisted together to obtain a twisted wire with a hollow structure; wherein, the rotation direction of rotation is the same as that of revolution;
carrying out three-stage heat treatment and shaping on the twisted wire;
cutting the shaped twisted wire rod according to the length of 1000mm-3000mm to obtain a core wire rod of a guide wire, wherein the core wire rod is a support section of the guide wire;
and welding one end of the guide wire core wire rod to the guide wire distal end component, and welding the other end of the guide wire core wire rod to the push rod to obtain the superfine multi-strand memory alloy guide wire.
2. A manufacturing process of an ultra-fine multi-strand memory alloy guide wire is characterized by comprising the following steps:
selecting a plurality of titanium-nickel-based memory alloy wires, respectively drawing the titanium-nickel-based memory alloy wires into a linear state, keeping the titanium-nickel-based memory alloy wires in a rigid state for 5-10 minutes at the temperature of 300-400 ℃, and then cooling the titanium-nickel-based memory alloy wires to room temperature for later use;
selecting n + m titanium-nickel-based memory alloy wires subjected to strengthening treatment, and arranging the wires in a circumferential array manner to form a concentric circle structure with n inner rings and m outer rings, wherein one ends of the concentric circle structure are flush with each other; wherein 2 xn = m, n being a positive integer greater than or equal to 4;
drawing one end of n + m titanium-nickel-based memory alloy wires which are leveled, wherein the drawing direction is the axial direction of the titanium-nickel-based memory alloy wires, each titanium-nickel-based memory alloy wire rotates along the central axis of the titanium-nickel-based memory alloy wire in the drawing process, and simultaneously revolves along the central axis of the circumferential array, so that the n + m titanium-nickel-based memory alloy wires are twisted together, and a hollow twisted wire with a double-layer structure is obtained; the rotation direction of the inner ring is the same as the rotation direction of the outer ring, and the rotation direction of the inner ring is opposite to the rotation direction of the outer ring;
carrying out three-stage heat treatment and shaping on the twisted wire;
cutting the shaped twisted wire rod according to the length of 1500mm-2500mm to obtain a core wire rod of a guide wire, wherein the core wire rod is a support section of the guide wire;
and welding one end of the guide wire core wire rod to the guide wire distal end component, and welding the other end of the guide wire core wire rod to the push rod to obtain the superfine multi-strand memory alloy guide wire.
3. A manufacturing process of an ultra-fine multi-strand memory alloy guide wire is characterized by comprising the following steps:
selecting a plurality of titanium-nickel-based memory alloy wires, respectively drawing the titanium-nickel-based memory alloy wires into a linear state, keeping the titanium-nickel-based memory alloy wires in a rigid state for 5-10 minutes at the temperature of 300-400 ℃, and then cooling the titanium-nickel-based memory alloy wires to room temperature for later use;
selecting o + p + q titanium-nickel-based memory alloy wires subjected to strengthening treatment, and arranging the wires in a circumferential array manner to form concentric circle structures with o inner rings, p middle rings and q outer rings, wherein one ends of the concentric circle structures are flush with one another; wherein 4 × o =2 × p = q, o is a positive integer of 4 or more;
drawing one end of the o + p + q titanium-nickel-based memory alloy wires which are level, wherein the drawing direction is the axial direction of the titanium-nickel-based memory alloy wires, enabling each titanium-nickel-based memory alloy wire to rotate along the central axis of the titanium-nickel-based memory alloy wire in the drawing process, and revolving along the central axis of the circumferential array, so that the o + p + q titanium-nickel-based memory alloy wires are twisted together, and obtaining a hollow twisted wire with a three-layer structure; the rotation direction of the inner ring is the same as the rotation direction of the revolution, the rotation direction of the middle ring is the same as the rotation direction of the revolution, the rotation direction of the outer ring is the same as the rotation direction of the revolution, the rotation direction of the inner ring is opposite to that of the middle ring, and the rotation direction of the inner ring is the same as that of the outer ring;
carrying out three-stage heat treatment and shaping on the twisted wire;
cutting the shaped twisted wire rod according to the length of 1500mm-2500mm to obtain a core wire rod of a section of guide wire, wherein the core wire rod is a support section of the guide wire;
and welding one end of the guide wire core wire rod to the guide wire distal end component, and welding the other end of the guide wire core wire rod to the push rod to obtain the superfine multi-strand memory alloy guide wire.
4. The process for manufacturing the ultrafine multi-strand memory alloy guide wire according to any one of claims 1 to 3, wherein the manufacturing method comprises the following steps: the diameter of the titanium-nickel-based memory alloy wire is 0.01-0.03mm.
5. The process for manufacturing the ultra-fine multi-strand memory alloy guidewire according to any one of claims 1 to 3, wherein: the three-stage heat treatment shaping is to draw the twisted wire rods, carry out heat treatment shaping in a three-stage hot box and then cool the twisted wire rods to room temperature;
the three-section type heat box is a far infrared ray or laser heating box, the temperature of the inlet end of the heat box is 167 ℃, the temperature of the middle section of the heat box is 199.5 ℃, and the temperature of the outlet end of the heat box is 232 ℃; the time from the entry of any point of the twisted wire into the three-stage hot box to the exit of the twisted wire is 6 to 8 minutes.
6. The process for manufacturing the ultra-fine multi-strand memory alloy guidewire according to any one of claims 1 to 3, wherein: when the titanium-nickel-based memory alloy wire rotates and revolves, the rotation torque is 6.7N m, the revolution torque is 17.3N m, and the traction force is 212N.
7. The process for manufacturing the ultra-fine multi-strand memory alloy guidewire according to any one of claims 1 to 3, wherein: the ultramicro multi-strand memory alloy guide wire welded with the guide wire distal end component and the push rod is provided with a post-treatment step, and the post-treatment step comprises the following steps:
soaking the ultramicro fine multistrand memory alloy guide wires in a polytetrafluoroethylene solution for soaking treatment, so that the surfaces of the guide wires are uniformly covered with a polytetrafluoroethylene coating;
then placing the mixture into an oven, baking at 160-190 ℃, and naturally cooling for 12-20 minutes;
repeating the steps for 1-2 times to obtain the coating ultra-fine multi-strand memory alloy guide wire;
cleaning the coated superfine multi-strand memory alloy guide wire for 1-2 times by using an ultrasonic cleaner, and then completely drying;
then the sterilized products are sterilized completely by irradiation and then are aseptically packaged and stored.
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| CN202211049291.4A CN115300762A (en) | 2022-08-30 | 2022-08-30 | Manufacturing process of superfine multi-strand memory alloy guide wire |
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| CN202211049291.4A CN115300762A (en) | 2022-08-30 | 2022-08-30 | Manufacturing process of superfine multi-strand memory alloy guide wire |
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