Titanium alloy wire braid, processing technology and application thereof

Abstract

The application discloses a titanium alloy wire weaving belt, a processing technology and application thereof, and belongs to the technical field of titanium alloy wire weaving belts.The titanium alloy wire weaving belt comprises a plurality of titanium alloy wires which are woven with each other, the plurality of titanium alloy wires are woven to form a round weaving belt with a circular cross section, or the plurality of titanium alloy wires are woven to form a flat weaving belt with a flat cross section, and the diameter of the titanium alloy wire is controlled to be between 0.05 mm and 0.20 mm.The application has the following advantages and effects: the scheme utilizes a new mechanical structure, can select the round weaving belt or the flat weaving belt according to an actual fracture site, and has the effects that the mechanical property of the weaving belt is higher and the weaving belt is not prone to be broken.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a titanium alloy wire webbing, its processing technology, and its application. Background Technology

[0002] Chinese patent CN111214284B discloses a biodegradable metal cable internal fixation system and its application. The internal fixation system includes a biodegradable metal cable, clamping buckles, and bone screws, which work together for binding and fixing after fractures. The metal cable is composed of several metal wires spirally twisted together. Titanium and titanium alloys, due to their good biocompatibility, mechanical properties, and corrosion resistance, have become ideal materials for manufacturing metal wires. However, existing technologies struggle to industrially produce ultra-fine titanium alloy wires with a diameter of 0.2 mm or less. Furthermore, the smaller the diameter of a single ultra-fine titanium alloy wire, the more difficult it is to manufacture using multiple ultra-fine wires. Metal cables of the same diameter woven from fine titanium alloy wires exhibit better mechanical properties, flexibility, and elasticity, making them less prone to breakage due to high tensile stress and large-angle bending. However, currently, domestically produced ultra-fine titanium alloy wires cannot achieve a diameter below 0.2mm, and the production of ultra-fine titanium alloy wires with a diameter below 0.2mm is almost entirely dependent on imports. Furthermore, existing technologies for imported ultra-fine titanium alloy wires below 0.2mm suffer from relatively simple weaving structures, resulting in metal cables with circular cross-sections that can easily cause marks on bone surfaces, damage periosteal nerves, and hinder fracture healing. Improvements are urgently needed. Summary of the Invention

[0003] The purpose of this invention is to provide a titanium alloy wire webbing, its processing technology and its application, which has the effect of allowing the selection of round or flat webbing according to the actual fracture site, and the webbing has higher mechanical properties and is less prone to breakage.

[0004] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a titanium alloy wire weave, comprising a plurality of interwoven titanium alloy wires, wherein the plurality of titanium alloy wires are woven to form a circular weave with a near-circular cross section, or wherein the plurality of titanium alloy wires are woven to form a flat weave with a flat cross section, and the diameter of the titanium alloy wires is controlled between 0.05-0.20 mm.

[0005] By adopting the above technical solution, this invention uses titanium alloy material to make titanium alloy wire. Titanium alloy wire has excellent biocompatibility, and the titanium alloy webbing can promote bone cell attachment and facilitate bone healing. Furthermore, a dense oxide layer can be formed on the surface of the titanium alloy wire, which can improve the corrosion resistance and service life of the webbing. This invention controls the diameter of a single titanium alloy wire between 0.05-0.20 mm, resulting in webbing woven from multiple ultra-fine titanium alloy wires having better mechanical properties and flexibility. The woven titanium alloy wire webbing also exhibits good resilience in both radial and axial directions, improving the performance of the titanium alloy webbing. The braided wire bandage provides stability for bone binding and also facilitates knotting and fixation at both ends. Furthermore, the operator can choose round braided bandages for internal fixation of fractures of the olecranon, medial and lateral malleoli, or flat braided bandages for internal fixation of fractures of long bones and joints in the limbs. Flat braided bandages reduce pressure on the bone surface, minimize damage to the periosteal nerves, and improve fracture healing rate. This invention allows for the selection of round or flat braided bandages based on the actual fracture site, and offers higher mechanical properties and less breakage, resulting in higher clinical efficacy compared to existing cables.

[0006] A further provision of the present invention is that the circular braided tape is woven from a plurality of first titanium alloy wires and second titanium alloy wires, wherein the diameter of the first titanium alloy wires is smaller than the diameter of the second titanium alloy wires.

[0007] By adopting the above technical solution, the circular braided belt made of first titanium alloy wire and second titanium alloy wire of different diameters has higher mechanical strength and mechanical properties. The second titanium alloy wire with a larger diameter provides the main support force and tensile strength, while the first titanium alloy wire with a smaller diameter assists in filling the mesh structure and enhances the overall durability of the circular braided belt.

[0008] A further configuration of the present invention is as follows: a plurality of first titanium alloy wires are twisted together to form a titanium alloy stranded rope distributed at the center of the circular braided belt. The titanium alloy stranded rope includes a central wire located at the center of the titanium alloy stranded rope and six peripheral wires spirally wound around the outer wall of the central wire. A plurality of second titanium alloy wires are cross-woven around the outer periphery of the titanium alloy stranded rope, and the diameter of the titanium alloy stranded rope is larger than the diameter of the second titanium alloy wires. The braiding angle between adjacent second titanium alloy wires in the circular braided belt is between 8 and 15°.

[0009] By adopting the above technical solution, the titanium alloy stranded rope adopts a "1+6" titanium alloy wire twisting structure to form a dense load-bearing structure, which greatly enhances the axial tensile strength of the titanium alloy stranded rope. The outer periphery of the thicker diameter second titanium alloy wire cross-weave provides radial constraint, effectively suppressing the radial deformation of the titanium alloy stranded rope and improving the overall breaking load strength of the circular braided belt. The titanium alloy stranded rope structure formed by the twisting of the thinner diameter first titanium alloy wire can effectively disperse stress concentration. Combined with the thicker diameter second titanium alloy wire braiding layer to absorb dynamic load impact, the service life of the circular braided belt of the present invention is extended.

[0010] A further feature of the present invention is that the titanium alloy stranded rope has three strands, the center wires of the three titanium alloy stranded ropes are distributed in an equilateral triangle, and the outer walls of adjacent titanium alloy stranded ropes are closely fitted together.

[0011] By adopting the above technical solution, the three strands are arranged in an equilateral triangle symmetrical arrangement to form a stable mechanical triangular support system, which evenly distributes axial and radial loads and improves the overall bending resistance of the circular braided belt. At the same time, the close fit between the outer walls of the adjacent titanium alloy strands eliminates stress concentration points and extends the service life of the circular braided belt. In addition, the triangular distribution and close fit structure work together to effectively suppress vibration transmission and maintain structural integrity under impact loads.

[0012] A further feature of the present invention is that the diameters of the titanium alloy wires in the flat braided strip are equal, and a hollow deformation cavity is formed in the middle region of the flat braided strip, and the braiding angle between adjacent titanium alloy wires in the flat braided strip is between 20° and 40°.

[0013] By adopting the above technical solution, the flat braided strip made of ultra-fine titanium alloy wire provides better circumferential binding performance and a lower cross-section compared to the round braided strip. This facilitates passage through narrow cavities such as long bones of the limbs and joints, reducing damage caused by the strip passing through tissues. At the same time, the addition of a hollow deformation cavity allows the flat braided strip to undergo elastic deformation inward when subjected to external compression, absorbing impact energy and reducing stress concentration. This greatly improves the fatigue life of the flat braided strip and avoids the risk of fracture caused by metal fatigue. In addition, when the flat braided strip is bound to the bone and is in a taut state, the hollow deformation cavity is subjected to compressive force in the thickness direction, causing the hollow deformation cavity to expand in the width direction to compensate for the reduction in thickness. This increases the compression area between the flat braided strip and the bone, making it less likely for the flat braided strip to slip when bound to the bone, reducing the possibility of the flat braided strip loosening relative to the bone.

[0014] A processing method for titanium alloy wire webbing includes the following steps:

[0015] S1: Ultra-fine filament drawing:

[0016] S101: Heating oxidation:

[0017] The coarse titanium wire was placed in an atmosphere with an argon to oxygen ratio of 9:1, with the pressure maintained between 0.4 and 0.6 atm and the temperature controlled between 890 and 910°C. The oxidation was carried out for a long time of 0.5 hours, so that a dense oxide film layer with tight bonding was formed on the surface of the coarse titanium wire.

[0018] S102: Preparation of wire drawing lubricant:

[0019] Animal fats, nano molybdenum dioxide particles, and dispersant are mixed evenly in a weight ratio of 80-90:5-12:3-8.

[0020] S103: Coarse drawing:

[0021] The lubricant prepared by S102 is coated or pre-impregnated to form an isolation layer on the surface of the titanium wire, the temperature of the lubricant is controlled to be maintained between 50-100℃, and coarse drawing is performed through a polycrystalline drawing die core;

[0022] S104: Annealing:

[0023] In an atmosphere with an argon to oxygen ratio of 9:1, the pressure is maintained between 0.4 and 0.6 atmospheres, while the temperature is controlled between 750 and 780°C. After annealing for 0.5 hours, an ultrathin and dense oxide film is formed on the surface of the titanium wire.

[0024] S105: Fine drawing: Repeat steps S102 and S103;

[0025] S2: Ultra-fine filament polishing:

[0026] S201: Polishing electrolyte preparation:

[0027] Anhydrous ethanol, 8-10% perchloric acid, and 4-7% hydrofluoric acid are mixed to form an electrolyte;

[0028] S202: Pickling;

[0029] S203: Electrolytic polishing: Platinum metal sheet is used as the negative electrode, titanium metal wire is used as the positive electrode, and the DC voltage is controlled at 25-30V, and the electrolyte temperature is less than 50 degrees Celsius for electrolysis;

[0030] S204: Drying. The titanium alloy wire is dried using a vacuum drying oven or hot air drying equipment. The drying temperature is controlled between 75-85℃ and the drying time is controlled between 30-45 minutes.

[0031] S3: Circular braided weave:

[0032] S301: Titanium alloy stranded rope braiding: Multiple outer wires are wrapped around the outside of the central wire to form a titanium alloy stranded rope;

[0033] S302: Titanium alloy strand twisting: Three titanium alloy strands obtained in step S301 are spirally wound together to form a titanium alloy inner core.

[0034] S303: Multiple second titanium alloy wires are woven around the titanium alloy core obtained in step 302, so that a titanium alloy wire braided layer formed by the cross-weaving of multiple second titanium alloy wires is formed around the titanium alloy core. The titanium alloy core and the titanium alloy wire braided layer together constitute a circular braided belt.

[0035] By adopting the above technical solutions, in steps S101 and S104, the present invention ensures the formation of a dense oxide film layer through the synergistic control of a specific nitrogen-oxygen atmosphere and temperature, enhancing the oxidation resistance and surface integrity of the wire, reducing frictional damage in subsequent processing, and effectively avoiding material deformation or performance fluctuations caused by high temperatures, thus achieving precise control over the dense oxide film. In step S102, the lubricant is composed of animal fat, nano-molybdenum dioxide particles, and a dispersant, which significantly reduces the coefficient of friction during the titanium alloy wire drawing process, preventing scratches on the surface of the titanium alloy wire, and also reducing energy consumption during the drawing process. Simultaneously, the lubricant temperature is controlled between 50-100℃ to ensure the lubricant adheres to the surface of the titanium alloy wire. Uniform coating, combined with a polycrystalline drawing die core to improve drawing efficiency; steps S103 and S105 involve repeated cycles of coarse and fine drawing, combined with intermediate annealing, to gradually reduce the wire diameter, achieving the drawing of coarse titanium alloy wires to ultra-fine titanium alloy wires, effectively preventing breakage during the drawing process. Simultaneously, argon-oxygen atmosphere annealing eliminates work hardening, reduces the oxide film thickness on the titanium alloy wire surface, avoids increased surface roughness, and improves the plasticity uniformity and concentricity of the titanium alloy wire along its length; steps S201-S203 use a mixed electrolyte of anhydrous ethanol + perchloric acid + hydrofluoric acid, with platinum as the negative electrode and titanium wire as the positive electrode, at a temperature less than 50... Electrolytic polishing is performed at low temperatures of 100 degrees Celsius and low voltage of 25-30V to efficiently remove oxidation residues, improve surface smoothness and corrosion resistance, and ultimately achieve microscopic smoothness of the ultra-fine filaments. At the same time, it can effectively reduce the amount of hydrogen absorbed during the polishing process of titanium alloy wires, avoiding excessive hydrogen absorption that could increase the brittleness of the wires and thus preventing the titanium alloy wires from breaking during the use of the webbing.

[0036] A further provision of the present invention is that step S202 includes the following steps:

[0037] S2021: Pickling solution preparation: Mix inorganic acid and corrosion inhibitor evenly. The inorganic acid is one of nitric acid, hydrochloric acid, hydrofluoric acid, phosphoric acid or oxalic acid, and the concentration of inorganic acid is controlled between 5-15%. The corrosion inhibitor is one of benzotriazole, thiazole, organothiol or phosphate, and the concentration of corrosion inhibitor is controlled between 0.1-1%.

[0038] S2022: Ultrasonic cleaning: Ultrasonic cleaning is performed using ultrasonic equipment. The frequency of the ultrasonic equipment is controlled between 20-50kHz, and the ultrasonic cleaning time is controlled between 2-10 minutes.

[0039] S2023: Heating and soaking: Heating and controlling the room temperature to be maintained between 30-60℃, and keeping warm for 5-15 minutes;

[0040] S2024: Repeat steps S2022-S2023 multiple times;

[0041] S2025: Post-treatment: Rinse with deionized water for 3-10 minutes to remove residual acid from the surface of the titanium alloy wire, and then dry the titanium alloy wire with vacuum drying equipment or hot air drying equipment.

[0042] An application of titanium alloy wire webbing in an internal fixation system is disclosed. The internal fixation system includes a tensioning and positioning assembly, a nail-shaped bone pin, and a titanium alloy wire webbing wrapped around the tensioning and positioning assembly and the nail-shaped bone pin. The tensioning and positioning assembly includes a pressure locking ring and a pressure screw. The outer wall of the pressure locking ring has a winding groove along the circumference to constrain the titanium alloy wire webbing. The pressure locking ring has a waist-shaped pressure groove for the pressure screw to pass through. The width of the first end of the pressure locking ring towards the second end is a teardrop shape that first increases and then decreases.

[0043] A guide sliding structure is provided between the pressure screw and the pressure locking ring. As the insertion depth of the pressure screw relative to the waist-shaped pressure groove gradually increases, the pressure locking ring slides laterally relative to the pressure screw under the guidance of the guide sliding structure, thereby adjusting the tightness of the titanium alloy wire webbing.

[0044] By adopting the above technical solution, the operator only needs to fix the nail-shaped bone pin at the fracture site, then lock the compression screw to the bone through the waist-shaped compression groove, then wrap one end of the titanium alloy wire webbing around the nail-shaped bone pin, and wrap the other end of the titanium alloy wire webbing around the side wall of the compression locking ring through the winding groove. Then, the compression screw is gradually tightened and inserted into the bone. Utilizing the guiding effect of the guide sliding structure, the compression locking ring slides laterally relative to the compression screw to the predetermined position until the titanium alloy wire webbing is tightened by the compression locking ring and the compression screw. This allows the titanium alloy wire webbing to firmly connect the bone fragments to the bone. The operation is convenient and does not require the operator to have high technical skills. It has the effects of convenient operation and easy installation.

[0045] A further feature of the present invention is that the titanium alloy wire webbing includes a first end and a second end, and the first end and the second end are fixedly connected by a locking buckle.

[0046] By adopting the above technical solution, before installing the titanium alloy wire webbing, the operator can select or cut the titanium alloy wire webbing to the appropriate length according to actual needs, and fix the first and second ends of the titanium alloy wire webbing together with locking buckles, so that the titanium alloy wire webbing is in the shape of a ring.

[0047] A further configuration of the present invention is as follows: the guide sliding structure includes a guide groove and a guide mating part, the guide mating part is disposed on the pressure screw, the guide groove is opened at the waist-shaped pressure groove opening end of the pressure locking ring, the guide mating part guides and engages with the guide groove, the opening width of the guide groove gradually increases from the first end of the pressure locking ring towards the second end, and the opening depth of the guide groove gradually increases from the first end of the pressure locking ring towards the second end;

[0048] The pressure screw includes a screw cap and a screw post, and the guide mating part is a spherical protrusion formed by the screw cap extending toward the screw post.

[0049] By adopting the above technical solution, when the screw is turned and gradually penetrates into the bone, the guide groove and the guide mating part guide the sliding cooperation, so that the position of the screw relative to the pressure locking ring slides laterally from the first end to the second end, and drives the titanium alloy wire webbing to a taut state. At this time, the engagement force between the screw and the bone is also greater. The spherical protrusion adapts to the shape of the guide groove, reducing the contact area between the guide mating part and the guide groove, so that the guide mating part can slide more smoothly in the guide groove.

[0050] An application of a titanium alloy wire webbing, wherein the circular braided webbing is used for tension compression fixation of fractures of the olecranon or medial and lateral malleoli.

[0051] An application of a titanium alloy wire webbing, wherein the flat woven webbing (9) is used for fixation and protection of the medullary cavity during fractures of the long bones of the limbs, as well as during joint replacement and revision.

[0052] In summary, the present invention has the following beneficial effects:

[0053] This invention involves controlling the pressure and temperature of coarse-diameter titanium alloy wire raw materials under an argon-oxygen atmosphere, uniformly coating the surface of the titanium alloy wire with a drawing lubricant, and electropolishing with a polishing electrolyte. This process is repeated multiple times to prepare ultrafine titanium alloy wires with a diameter between 0.05-0.20 mm. Utilizing the excellent biocompatibility of titanium alloy wire, the titanium alloy webbing of this invention can promote bone cell attachment and facilitate bone healing. Furthermore, a dense oxide layer can form on the surface of the titanium alloy wire, improving the corrosion resistance and service life of the webbing. By controlling the diameter of a single titanium alloy wire to between 0.05-0.20 mm, this invention allows the webbing woven from multiple ultrafine titanium alloy wires to possess better mechanical properties and flexibility. The woven titanium alloy wire braided band has good resilience in both the radial and axial directions, improving the stability of the band for binding bones. It also facilitates knotting and fixation at both ends of the band. Furthermore, the operator can choose round braided bands for internal fixation of fractures of the olecranon, medial and lateral malleoli, etc., or flat braided bands for internal fixation of fractures of long bones and joints of the limbs. Flat braided bands reduce the compressive force on the bone surface, reduce damage to the periosteal nerves, and improve the fracture healing rate. This invention allows for the selection of round or flat braided bands based on the actual fracture site, and offers higher mechanical properties and less breakage. Compared to existing cables, it results in higher clinical efficacy. Attached Figure Description

[0054] Figure 1 This is a structural diagram of the circular braided tape in a specific embodiment of the present invention.

[0055] Figure 2 This is a longitudinal sectional view of the circular braided tape of the present invention.

[0056] Figure 3 This is a structural diagram of the circular braided tape of the present invention.

[0057] Figure 4 This is a structural diagram of the flat braided strip in a specific embodiment two of the present invention.

[0058] Figure 5 This is a longitudinal sectional view of the flat woven tape of the present invention.

[0059] Figure 6 This is a structural diagram of the flat braided tape of the present invention.

[0060] Figure 7This is a scanning electron microscope image of the surface of the ultrafine titanium alloy wire of the present invention.

[0061] Figure 8 This is a schematic diagram of the positioning pin of the present invention positioning the pressure locking ring on the bone.

[0062] Figure 9 This is a schematic diagram of the pressure screw of the present invention locking the pressure locking ring to the bone, with the positioning pin removed.

[0063] Figure 10 This is the present invention. Figure 9 The structural diagram is shown, but the skeleton is not shown.

[0064] Figure 11 This is an exploded view of the pressure locking ring and pressure screw of the present invention.

[0065] Figure 12 This is the present invention. Figure 11 A longitudinal sectional view.

[0066] Figure 13 This is a top view of the pressure locking ring of the present invention.

[0067] Figure 14 This is a schematic diagram of the circular woven strap fixing the olecranon of the ulna according to the present invention.

[0068] Figure 15 This is a schematic diagram of how the circular braided strap of the present invention fixes the medial and lateral malleoli.

[0069] Figure 16 This is a schematic diagram of the fixation of the patella by the circular braided strap of the present invention.

[0070] Figure 17 This is a schematic diagram of the fixation of the fibula by the circular braided strap of the present invention.

[0071] Figure 18 This is a schematic diagram of the individual binding of the long bones of the limbs with the flat woven strap of the present invention.

[0072] Figure 19 This is a schematic diagram of the binding of the long bones of the limbs with the flat woven strap and bone plate of the present invention.

[0073] Figure 20 This is a schematic diagram of the individual binding of the flat woven strap for joint repair according to the present invention.

[0074] Figure 21 This is a schematic diagram of the binding of the flat woven strap with the bone plate for joint repair according to the present invention.

[0075] Figure 22 This invention relates the radial diameter of two circular braided tapes of different lengths to the tension force after being stretched twice.

[0076] Figure 23 This relates the elongation and tension of two circular braided strips of different lengths in this invention to the integral stainless steel strip in the prior art.

[0077] In the diagram: 1. Tensioning and positioning assembly; 2. Pressure locking ring; 21. Winding groove; 22. Waist-shaped pressure groove; 23. Guide groove; 24. Positioning hole; 241. Positioning pin; 3. Pressure screw; 31. Screw cap; 311. Guide mating part; 312. Tightening hole; 32. Screw post; 321. Spiral groove; 4. Nail-type bone needle; 41. Bone nail segment; 42. Winding segment; 421. Wire stop part; 422. Winding track; 5. Titanium alloy wire webbing; 51. First end; 52. Second end; 6. Locking buckle; 7. Bone; 70. Bone suture; 71. Bone fragment; 8. Round braided tape; 81. Titanium alloy stranded rope; 811. First titanium alloy wire; 82. Second titanium alloy wire; 9. Flat braided tape; 91. Hollow deformation cavity; 10. Bone plate. Detailed Implementation

[0078] The invention will now be further described with reference to the accompanying drawings. Specific Implementation Example 1

[0080] A titanium alloy wire weave, such as Figures 1-3 As shown, the device includes several interwoven titanium alloy wires, which are woven to form a circular braided strip 8 with a near-circular cross-section. The diameter of the titanium alloy wires is controlled between 0.05-0.20 mm. The circular braided strip 8 is woven from several first titanium alloy wires 811 and second titanium alloy wires 82. The diameter of the first titanium alloy wire 811 is smaller than the diameter of the second titanium alloy wire 82. The circular braided strip 8, woven with first titanium alloy wires 811 and second titanium alloy wires 82 of different diameters, has higher mechanical strength and mechanical properties. The larger diameter second titanium alloy wire 82 provides the main support force and tensile strength, while the smaller diameter first titanium alloy wire 811 assists in filling the mesh structure and enhances the overall durability of the circular braided strip 8. In this embodiment, the diameter of the first titanium alloy wire 811 is selected as 0.08 mm or 0.12 mm, and the diameter of the second titanium alloy wire 82 is selected as 0.14 mm or 0.16 mm.

[0081] Several first titanium alloy wires 811 are twisted together to form a titanium alloy stranded rope 81 distributed at the center of the circular braided belt 8. The titanium alloy stranded rope 81 includes a center wire 8111 located at the center of the titanium alloy stranded rope 81 and six peripheral wires 8112 spirally wound around the outer wall of the center wire 8111. Several second titanium alloy wires 82 are cross-woven around the outer periphery of the titanium alloy stranded rope 81, and the diameter of the titanium alloy stranded rope 81 is larger than the diameter of the second titanium alloy wires 82. The weaving angle between adjacent second titanium alloy wires 82 in the circular braided belt 8 is between 8-15°. The titanium alloy stranded rope 81 adopts a "1+6" titanium alloy wire twisting structure to form a dense load-bearing structure, which greatly enhances the axial tensile strength of the titanium alloy stranded rope 81. The cross-weaving of the outer periphery of the larger diameter second titanium alloy wires 82 provides radial restraint, effectively suppressing the radial deformation of the titanium alloy stranded rope 81 and improving the overall strength of the circular braided belt 8. The titanium alloy stranded rope 81 structure, formed by twisting the first titanium alloy wire 811 with a smaller diameter, can effectively disperse stress concentration. Combined with the braided layer of the second titanium alloy wire 82 with a larger diameter, it absorbs dynamic load impact, thereby extending the service life of the circular braided belt 8 of this invention. The titanium alloy stranded rope 81 consists of three strands, with the center wires 8111 of the three strands arranged in an equilateral triangle. The outer walls of adjacent titanium alloy stranded ropes 81 are tightly fitted together. The three strands are arranged symmetrically in an equilateral triangle, forming a stable mechanical triangular support system that evenly disperses axial and radial loads, improving the overall bending resistance of the circular braided belt 8. Simultaneously, the tight fit of the outer walls of adjacent titanium alloy stranded ropes 81 eliminates stress concentration points, extending the service life of the circular braided belt 8. Furthermore, the triangular distribution and tight fit work together to effectively suppress vibration transmission, maintaining structural integrity under impact loads. Specific Implementation Example 2

[0083] A titanium alloy wire weave, such as Figures 4-6As shown, the device includes several interwoven titanium alloy wires, which are woven together to form a flat braided strip 9 with a flat cross-section. The diameter of the titanium alloy wires is controlled between 0.05-0.20 mm. The diameters of the titanium alloy wires in the flat braided strip 9 are equal, and a hollow deformation cavity 91 is formed in the middle region of the flat braided strip 9. The weaving angle between adjacent titanium alloy wires in the flat braided strip 9 is controlled between 20-40°. Compared with the round braided strip 8, the flat braided strip 9 made of ultra-fine titanium alloy wires can provide better circumferential performance and a lower cross-section, making it easier to pass through narrow cavities such as long bones of the limbs and joints, reducing the damage caused by the webbing when passing through tissues. The addition of the hollow deformation cavity 91 allows the flat braided strip 9 to undergo elastic deformation inward when subjected to external compression, absorbing impact energy and reducing stress concentration. This greatly improves the fatigue life of the flat braided strip 9 and avoids the risk of fracture caused by metal fatigue. In addition, when the flat braided strip 9 is tied to the skeleton 7 and is in a taut state, the hollow deformation cavity 91 is subjected to compressive force in the thickness direction, causing the hollow deformation cavity 91 to expand in the width direction to compensate for the reduction in thickness. This increases the compression area between the flat braided strip 9 and the skeleton 7, making it less likely for the flat braided strip 9 to slip when tied to the skeleton 7 and reducing the possibility of the flat braided strip 9 loosening relative to the skeleton 7.

[0084] This invention produces ultra-fine titanium alloy wires with a diameter between 0.05 and 0.20 mm by controlling the pressure and temperature of coarse-diameter titanium alloy wire raw materials under an argon-oxygen atmosphere, uniformly coating the surface of the titanium alloy wires with a drawing lubricant, and electropolishing with a polishing electrolyte. This process is repeated multiple times. Utilizing the excellent biocompatibility of titanium alloy wires, the titanium alloy webbing of this invention promotes bone cell attachment and facilitates bone healing. Furthermore, a dense oxide layer containing titanium dioxide can form on the surface of the titanium alloy wires, improving the corrosion resistance and service life of the webbing. By controlling the diameter of a single titanium alloy wire to between 0.05 and 0.20 mm, the webbing woven from multiple ultra-fine titanium alloy wires exhibits better mechanical properties and flexibility. The woven titanium alloy wire braided band has good resilience in both the radial and axial directions, which improves the stability of the titanium alloy wire braided band when binding the bone 7. It also facilitates the knotting and fixation at both ends of the titanium alloy wire braided band. In addition, the operator can choose the round braided band 8 to achieve internal fixation for fractures of the olecranon and medial and lateral malleoli, and choose the flat braided band 9 to achieve internal fixation for fractures of long bones and joints of the limbs. The flat braided band 9 can reduce the compressive force of the band on the surface of the bone 7, reduce the degree of damage to the periosteal nerve, and improve the fracture healing rate. This invention has the effect of selecting the round braided band 8 or the flat braided band 9 according to the actual fracture site, and the band has higher mechanical properties and is less prone to breakage. Compared with existing cables, it results in higher clinical efficacy.

[0085] A processing technology for titanium alloy wire webbing includes the following steps: S1: drawing ultrafine filaments:

[0086] S101: Heating oxidation:

[0087] The coarse titanium wire was placed in an atmosphere with an argon to oxygen ratio of 9:1, with the pressure maintained between 0.4 and 0.6 atm and the temperature controlled between 890 and 910°C. The oxidation was carried out for a long time of 0.5 hours, so that a dense oxide film layer with tight bonding was formed on the surface of the coarse titanium wire.

[0088] S102: Preparation of wire drawing lubricant:

[0089] Animal fats, nano molybdenum dioxide particles, and dispersant are mixed evenly in a weight ratio of 80-90:5-12:3-8.

[0090] S103: Coarse drawing:

[0091] The lubricant prepared by S102 is coated or pre-impregnated to form an isolation layer on the surface of the titanium wire, the temperature of the lubricant is controlled to be maintained between 50-100℃, and coarse drawing is performed through a polycrystalline drawing die core;

[0092] S104: Annealing:

[0093] In an atmosphere with an argon to oxygen ratio of 9:1, the pressure is maintained between 0.4 and 0.6 atmospheres, while the temperature is controlled between 750 and 780°C. After annealing for 0.5 hours, an ultrathin and dense oxide film is formed on the surface of the titanium wire.

[0094] S105: Fine drawing: Repeat steps S102 and S103;

[0095] S2: Ultra-fine filament polishing:

[0096] S201: Polishing electrolyte preparation:

[0097] Anhydrous ethanol, 8-10% perchloric acid, and 4-7% hydrofluoric acid are mixed to form an electrolyte;

[0098] S202: Pickling:

[0099] S2021: Pickling solution preparation: Mix inorganic acid and corrosion inhibitor evenly. The inorganic acid is one of nitric acid, hydrochloric acid, hydrofluoric acid, phosphoric acid or oxalic acid, and the concentration of inorganic acid is controlled between 5-15%. The corrosion inhibitor is one of benzotriazole, thiazole, organothiol or phosphate, and the concentration of corrosion inhibitor is controlled between 0.1-1%.

[0100] S2022: Ultrasonic cleaning: Ultrasonic cleaning is performed using ultrasonic equipment. The frequency of the ultrasonic equipment is controlled between 20-50kHz, and the ultrasonic cleaning time is controlled between 2-10 minutes.

[0101] S2023: Heating and soaking: Heating and controlling the room temperature to be maintained between 30-60℃, and keeping warm for 5-15 minutes;

[0102] S2024: Repeat steps S2022-S2023 multiple times;

[0103] S2025: Post-treatment: Rinse with deionized water for 3-10 minutes to remove residual acid from the surface of the titanium alloy wire, and then dry the titanium alloy wire with vacuum drying equipment or hot air drying equipment.

[0104] S203: Electrolytic polishing: Platinum metal sheet is used as the negative electrode, titanium metal wire is used as the positive electrode, and the DC voltage is controlled at 25-30V, and the electrolyte temperature is less than 50 degrees Celsius for electrolysis;

[0105] S204: Drying. The titanium alloy wire is dried using a vacuum drying oven or hot air drying equipment. The drying temperature is controlled between 75-85℃ and the drying time is controlled between 30-45 minutes.

[0106] S3: Circular braided tape with 8 weaves:

[0107] S301: Titanium alloy stranded rope 81 braiding: Multiple outer wires are wrapped around the outside of the central wire to form a titanium alloy stranded rope 81;

[0108] S302: Titanium alloy stranded rope 81 twisting: Three titanium alloy stranded ropes 81 obtained by step S301 are spirally wound together to form a titanium alloy inner core.

[0109] S303: Multiple second titanium alloy wires 82 are woven around the titanium alloy inner core obtained in step 302, so that a titanium alloy wire braided layer formed by the cross-weaving of multiple second titanium alloy wires 82 is formed around the titanium alloy inner core. The titanium alloy inner core and the titanium alloy wire braided layer together constitute a circular braided belt 8.

[0110] In steps S101 and S104, a dense oxide film is formed through the synergistic control of a specific nitrogen-oxygen atmosphere and temperature, enhancing the oxidation resistance and surface integrity of the wire, reducing frictional damage during subsequent processing, and effectively preventing material deformation or performance fluctuations caused by high temperatures, thus achieving precise control over the dense oxide film. In step S102, the lubricant consists of animal fat, nano-molybdenum dioxide particles, and a dispersant. The animal fat is one or more of refined beef tallow fatty acids, mutton fatty acids, lard fatty acids, and fish oil fatty acids. The dispersant is one or more of polyethylene glycol octylphenyl ether, fatty alcohol polyoxyethylene ethers, polysorbates, and sorbitan fatty acid esters, significantly reducing the coefficient of friction during the titanium alloy wire drawing process, preventing surface scratches on the titanium alloy wire, and also reducing energy consumption during the drawing process. The lubricant consumption is controlled, and the lubricant temperature is maintained between 50-100℃ to ensure uniform coating of the lubricant on the surface of the titanium alloy wire. This is combined with a polycrystalline drawing die to improve drawing efficiency. Steps S103 and S105 involve repeated cycles of coarse and fine drawing, combined with intermediate annealing, to gradually reduce the wire diameter, achieving the drawing process from coarse to ultra-fine titanium alloy wires. This effectively prevents breakage during the drawing process. Simultaneously, argon-oxygen atmosphere annealing eliminates work hardening, reduces the oxide film thickness on the titanium alloy wire surface, and prevents an increase in surface roughness, improving the plasticity uniformity and concentricity of the titanium alloy wire along its length. Steps S201-S203 use a mixed electrolyte of anhydrous ethanol, perchloric acid, and hydrofluoric acid, with platinum as the negative electrode and titanium wire as the positive electrode, at a temperature less than 50℃. Electrolytic polishing is performed at a low temperature of 25-30V and a low voltage of 25-30°C to efficiently remove oxide residues, improve surface smoothness and corrosion resistance, and ultimately achieve microscopic smoothness of the ultrafine wire. At the same time, it can effectively reduce the amount of hydrogen absorbed during the polishing process of titanium alloy wire, avoiding excessive hydrogen absorption that would increase the brittleness of the wire and thus prevent the titanium alloy wire from breaking during the use of the webbing. The ultrafine titanium alloy wire produced by this process has a hydrogen content of <0.015%, an oxygen content of <0.20%, a tensile strength of ≥1200MPa, and a surface smoothness Ra≤0.38μm. The drying equipment in step S204 can also be a vacuum oven, a vacuum hot air circulating drying oven, etc.

[0111] Depend on Figure 22 It can be seen that the circular braided tape 8, due to its cross-weave structure, possesses radial elastic deformation capability. As the tension force on the tape gradually increases, the radial diameter of the circular braided tape 8 gradually decreases. Figure 23 It can be seen that, under the same tension force, the circular braided strip 8 of the present invention has a significantly improved elongation rate compared with the stainless steel integral strip of the prior art.

[0112] An application of titanium alloy wire webbing in internal fixation systems, such as... Figures 6-7As shown, the internal fixation system includes a tensioning and positioning assembly 1, a nail-shaped bone pin 4, and a titanium alloy wire webbing 5 wrapped around the tensioning and positioning assembly 1 and the nail-shaped bone pin 4. The tensioning and positioning assembly 1 includes a pressure locking ring 2 and a pressure screw 3. The outer wall of the pressure locking ring 2 has a winding groove 21 along the circumference to constrain the titanium alloy wire webbing 5. The pressure locking ring 2 has a waist-shaped pressure groove 22 for the pressure screw 3 to pass through. A guide sliding structure is provided between the pressure screw 3 and the pressure locking ring 2. When the insertion depth of the pressure screw 3 relative to the waist-shaped pressure groove 22 gradually increases, under the guidance of the guide sliding structure, the pressure locking ring 2 slides laterally relative to the pressure screw 3 and adjusts the tightness of the titanium alloy wire webbing 5.

[0113] like Figures 11-13 As shown, the guide sliding structure includes a guide groove 23 and a guide mating part 311. The guide mating part 311 is provided on the pressure screw 3. The guide groove 23 is opened at the opening end of the waist-shaped pressure groove 22 of the pressure locking ring 2. The guide mating part 311 guides and engages with the guide groove 23. The opening width of the guide groove 23 gradually increases from the first end to the second end of the pressure locking ring 2, and the opening depth of the guide groove 23 gradually increases from the first end to the second end of the pressure locking ring 2. When the pressure screw 3 is screwed deeper into the bone 7, the guide sliding engagement between the guide groove 23 and the guide mating part 311 causes the position of the pressure screw 3 relative to the pressure locking ring 2 to slide laterally from the first end to the second end, driving the titanium alloy wire webbing 5 to a taut state. At this time, the engagement force between the fitted pressure screw 3 and the bone 7 is also greater. The pressure screw 3 includes a screw cap 31 and a screw post 32. The guide mating part 311 is provided with... The spherical protrusion extending from the screw cap 31 toward the screw post 32 is adapted to the shape of the guide groove 23, reducing the contact area between the guide mating part 311 and the guide groove 23, allowing the guide mating part 311 to slide more smoothly within the guide groove 23. Several spiral grooves 321 are provided on the surface of the screw post 32, and a screw hole 312 is provided at the end of the screw cap 31 away from the screw post 32. The addition of spiral grooves 321 facilitates the screw post 32 to be screwed into the bone 7 more smoothly. The operator can use a specific tool to screw the pressure screw 3 through the screw hole 312. The width of the first end of the pressure locking ring 2 toward the second end is a teardrop shape that first increases and then decreases, making the width of the pressure locking ring 2 closer to the nail-shaped bone needle 4 smaller. This helps to reduce the contact area between the pressure locking ring 2 and the titanium alloy wire webbing 5, and improves the smoothness of the sliding of the titanium alloy wire webbing 5 on the pressure locking ring 2.

[0114] like Figures 8-13As shown, a positioning hole 24 is provided through the pressure locking ring 2, and a positioning pin 241 is inserted into the positioning hole 24. Before installation, the positioning pin 241 can be inserted into the bone 7 through the positioning hole 24 to pre-position the pressure locking ring 2. Then, the pressure screw 3 is installed. When the pressure screw 3 is installed on the surface of the bone 7, the positioning pin 241 is removed and the pressure screw 3 is screwed deeper into the bone 7. The guide sliding structure is used to tighten the titanium alloy wire webbing 5. There are two nail-type bone pins 4, which are arranged in a triangle with the pressure screw 3. The triangular arrangement of the nail-type bone pins 4 and the pressure screw 3 helps to improve the installation firmness of the titanium alloy wire webbing 5. The titanium alloy wire webbing 5 is made of titanium alloy material and is wrapped around the nail-type bone pins 4 and the pressure screw 3 in a figure-eight shape. The figure-eight-shaped wrapping of the titanium alloy wire webbing 5 helps to improve the installation firmness of the titanium alloy wire webbing 5. The titanium alloy wire webbing 5 is designed to prevent detachment from the pressure locking ring 2 and the nail-shaped bone needle 4. The titanium alloy wire webbing 5 includes a first end 51 and a second end 52, which are fixedly connected by a locking buckle 6. Before installation, the operator can select or cut the titanium alloy wire webbing 5 to the appropriate length as needed, and fix the first end 51 and the second end 52 of the titanium alloy wire webbing 5 to the locking buckle 6, so that the titanium alloy wire webbing 5 is in a ring shape. The nail-shaped bone needle 4 includes a bone nail segment 41 and a winding segment 42. The winding segment 42 includes at least two wire-blocking parts 421 integrally formed on the pressure screw 3. A winding track 422 for winding the titanium alloy wire webbing 5 is formed between adjacent wire-blocking parts 421. The wire-blocking parts 421 can effectively prevent the titanium alloy wire webbing 5 from coming out of the winding track 422 of the winding segment 42, thereby improving the connection stability between the titanium alloy wire webbing 5 and the nail-shaped bone needle 4.

[0115] The working principle of the internal fixation system is as follows: The internal fixation system includes a tensioning and positioning component 1, a nail-shaped bone pin 4, and a titanium alloy wire webbing 5 wrapped around the tensioning and positioning component 1 and the nail-shaped bone pin 4. The tensioning and positioning component 1 includes a pressure locking ring 2 and a pressure screw 3. The outer wall of the pressure locking ring 2 has a winding groove 21 along the circumference to constrain the titanium alloy wire webbing 5. The pressure locking ring 2 has a waist-shaped pressure groove 22 for the pressure screw 3 to pass through. A guide sliding structure is provided between the pressure screw 3 and the pressure locking ring 2. The guide sliding structure includes a guide groove 23 and a guide mating part 311. The guide mating part 311 is provided on the pressure screw 3. The guide groove 23 is opened at the opening end of the waist-shaped pressure groove 22 of the pressure locking ring 2. The opening width of the guide groove 23 gradually increases from the first end of the pressure locking ring 2 to the second end, and the opening depth of the guide groove 23 gradually increases from the first end of the pressure locking ring 2 to the second end. The structure gradually increases from one end to the second end. The guide fitting part 311 guides and fits with the guide groove 23. During use, the operator only needs to fix the nail-shaped bone needle 4 on the bone fragment 71, then lock the pressure screw 3 onto the bone 7 through the waist-shaped pressure groove 22, then wrap one end of the titanium alloy wire webbing 5 around the nail-shaped bone needle 4, and wrap the other end of the titanium alloy wire webbing 5 around the side wall of the pressure locking ring 2 through the winding groove 21. Then, the pressure screw 3 is gradually tightened and inserted into the bone 7. Utilizing the guiding effect of the guide sliding structure, the pressure locking ring 2 slides laterally relative to the pressure screw 3 to the predetermined position until the titanium alloy wire webbing 5 is tightened by the pressure locking ring 2 and the pressure screw 3, thus firmly connecting the bone fragment 71 and the bone 7 together. The operation is convenient and does not require the operator to have high technical skills. It has the effects of convenient operation and easy installation.

[0116] An application of titanium alloy wire webbing, the circular braided webbing 8 is used for tension compression fixation of fractures of the olecranon or medial and lateral malleoli.

[0117] An application of a titanium alloy wire webbing: the flat braided webbing 9 is used for fixation and protection of the medullary cavity during fractures of the long bones of the limbs, as well as during joint replacement and revision.

[0118] The above description is only a preferred embodiment of the present invention. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of this patent application are included in the scope of this patent application.

Claims

1. An application of a titanium alloy wire webbing in an internal fixation system, characterized in that: The internal fixation system includes a tensioning and positioning assembly (1), a nail-shaped bone pin (4), and a titanium alloy wire webbing (5) wrapped around the tensioning and positioning assembly (1) and the nail-shaped bone pin (4). The tensioning and positioning assembly (1) includes a pressure locking ring (2) and a pressure screw (3). The outer wall of the pressure locking ring (2) has a winding groove (21) along the circumferential direction for restraining the titanium alloy wire webbing (5). The pressure locking ring (2) has a waist-shaped pressure groove (22) for the pressure screw (3) to pass through. The width of the first end of the pressure locking ring (2) towards the second end is a teardrop shape that first increases and then decreases. A guide sliding structure is provided between the pressure screw (3) and the pressure locking ring (2). When the insertion depth of the pressure screw (3) relative to the waist-shaped pressure groove (22) gradually increases, under the guidance of the guide sliding structure, the pressure locking ring (2) slides laterally relative to the pressure screw (3) and adjusts the tightness of the titanium alloy wire webbing (5). The titanium alloy wire weave (5) includes a plurality of interwoven titanium alloy wires, which are woven to form a circular weave (8) with a near-circular cross section, or the titanium alloy wires are woven to form a flat weave (9) with a flat cross section, and the diameter of the titanium alloy wires is controlled between 0.05-0.20 mm.

2. The application of the titanium alloy wire webbing according to claim 1, characterized in that: The circular braided tape (8) is woven from a plurality of first titanium alloy wires (811) and second titanium alloy wires (82), wherein the diameter of the first titanium alloy wires (811) is smaller than the diameter of the second titanium alloy wires (82).

3. The application of the titanium alloy wire webbing according to claim 2, characterized in that: A plurality of first titanium alloy wires (811) are twisted together to form a titanium alloy stranded rope (81) distributed at the center of the circular braided belt (8). The titanium alloy stranded rope (81) includes a center wire (8111) located at the center of the titanium alloy stranded rope (81) and six peripheral wires (8112) spirally wound around the outer wall of the center wire (8111). A plurality of second titanium alloy wires (82) are cross-woven on the outer periphery of the titanium alloy stranded rope (81), and the diameter of the titanium alloy stranded rope (81) is larger than the diameter of the second titanium alloy wires (82). The weaving angle between adjacent second titanium alloy wires (82) in the circular braided belt (8) is between 8 and 15°.

4. The application of the titanium alloy wire webbing according to claim 3, characterized in that: The titanium alloy stranded rope (81) has three strands, and the center wires (8111) of the three titanium alloy stranded ropes (81) are distributed in an equilateral triangle, and the outer walls of adjacent titanium alloy stranded ropes (81) are closely attached.

5. The application of the titanium alloy wire webbing according to claim 1, characterized in that: The titanium alloy wires of the flat braided strip (9) have equal diameters, and a hollow deformation cavity (91) is formed in the middle region of the flat braided strip (9), and the braiding angle between adjacent titanium alloy wires in the flat braided strip (9) is between 20-40°.

6. The application of the titanium alloy wire webbing according to claim 1, characterized in that: The titanium alloy wire webbing (5) includes a first end (51) and a second end (52), which are fixedly connected by a locking buckle (6).

7. The application of a titanium alloy wire webbing according to claim 6, characterized in that: The guide sliding structure includes a guide groove (23) and a guide mating part (311). The guide mating part (311) is provided on the pressure screw (3). The guide groove (23) is opened at the opening end of the waist-shaped pressure groove (22) of the pressure locking ring (2). The guide mating part (311) guides and mates with the guide groove (23). The opening width of the guide groove (23) gradually increases from the first end of the pressure locking ring (2) toward the second end, and the opening depth of the guide groove (23) gradually increases from the first end of the pressure locking ring (2) toward the second end. The pressure screw (3) includes a screw cap (31) and a screw post (32), and the guide mating part (311) is a spherical protrusion formed by the screw cap (31) extending toward the screw post (32).

8. An application of the titanium alloy wire webbing as described in claim 1, characterized in that: The circular braided band (8) is used for tension compression fixation of fractures of the olecranon or medial and lateral malleoli.

9. An application of the titanium alloy wire webbing as described in claim 1, characterized in that: The flat braided band (9) is used to fix and protect the medullary cavity during fractures of the long bones of the limbs, as well as during joint replacement and revision.

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