Processing method of medical high-strength titanium bone needle

Abstract

The application discloses a medical high-strength titanium bone needle processing method, which comprises the following steps of material selection, upsetting and drawing processing, forging, grinding, square billet rolling, primary rod billet rolling, skin scraping and grinding, secondary rod billet rolling, wire drawing, annealing and high-frequency wire straightening. The titanium wire bone needle prepared by the application has a tensile strength greater than 1200 MPa, which is higher than that of a conventional titanium wire bone needle. The titanium bone needle prepared by the application can have a smaller outer diameter and ensure sufficient strength and smaller weight, so that more accurate treatment effect can be achieved, the excessive damage and discomfort caused by the treatment to the patient's body can be effectively reduced, the activity range of the patient after the treatment can be expanded, and the application can be widely applied to orthopedic treatment.

Description

Technical Field

[0001] This invention relates to the field of medical titanium bone needle molding technology, and in particular to a method for processing high-strength medical titanium bone needles. Background Technology

[0002] Medical bone needles are needles used in medical procedures to sew on patients. Originally, they were made from animal bones. With the development of technology, bone needles are now made from metals with no side effects. Due to the biocompatibility and high strength of titanium, it is now widely used to make bone needles. Smaller outer diameter sizes can also be made. In the later stages of treatment, this not only facilitates smooth and accurate treatment by medical staff, but also effectively reduces excessive damage and discomfort to the patient's body.

[0003] Currently, besides suturing, titanium bone needles are also widely used in orthopedic bone reattachment. Due to titanium's high strength, it can improve the effectiveness of bone reattachment treatment and allow patients a greater range of motion after recovery, reducing the significant impact of bone diseases on their lives. While titanium is primarily used in industrial applications due to its typically large dimensions, its strength meets the needs of those fields. However, in orthopedic treatment, to reduce treatment difficulty and minimize the impact on patients' later mobility, smaller titanium bone needles, especially those with smaller outer diameters, are usually manufactured. This requires higher strength, and the titanium materials produced in other industrial sectors cannot meet the strength requirements of titanium bone needles. When applied to orthopedic treatment, thinner titanium bone needles are prone to breakage, while thicker needles pose treatment difficulties and affect the patient's normal activities later on. Summary of the Invention

[0004] To address the aforementioned problems, this invention aims to provide a method for processing high-strength titanium bone needles for medical use. Titanium bone needles prepared by this method can maintain a relatively small outer diameter while exhibiting higher intrinsic strength compared to titanium materials prepared in the industrial field. This effectively reduces the difficulty of treatment during subsequent procedures, while simultaneously ensuring long-term connection strength and allowing for a greater range of motion for the patient. It can be widely applied in orthopedic treatment.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A method for processing high-strength titanium bone needles for medical use, characterized by comprising the following steps:

[0006] S1. Material Selection: Select titanium ingots with the following composition percentage requirements: Al: 6.0-6.4%, Fe: 0.15-0.18%, V: 3.7-4.1%, O: 0.16-0.18%.

[0007] S2. Upsetting and drawing: The process is three-stage upsetting and three-stage drawing, with an upsetting and drawing temperature of 1100-1200℃.

[0008] S3. Forging: The forging process is carried out in two stages. The temperature of the first stage is 980-990℃, and the temperature of the second stage is 960-980℃.

[0009] S4. Grinding: Grinding the forged ingot into square pieces with equal length and width.

[0010] S5. Rolled square billet: Rolling temperature is 940-950℃;

[0011] S6. One-time rolled billet: rolling temperature is 930-950℃;

[0012] S7. Peeling and Grinding: After removing the outer skin of the rolled bar, the surface is ground.

[0013] S8. Secondary rolled bar billet: Rolling temperature is 910-930℃;

[0014] S9. Wire drawing: Seven-pass wire drawing is used, with each pass having a necking of not less than 0.5mm.

[0015] S10, Annealing: The annealing temperature of the wire is 650-700℃;

[0016] S11, High-frequency wire straightening: The current for high-frequency straightening is 18-20A, and the speed is 9m / min;

[0017] S12. Annealing of titanium wire: The annealing temperature of titanium wire is 680-700℃.

[0018] Preferably, in step In this process, the wire drawing is a hot wire drawing process, with the following temperatures: first wire drawing temperature 875-885℃, second wire drawing temperature 865-875℃, third wire drawing temperature 855-865℃, fourth wire drawing temperature 845-855℃, fifth wire drawing temperature 835-845℃, sixth wire drawing temperature 825-835℃, and seventh wire drawing temperature 825-835℃.

[0019] Preferably, the drawing temperatures for each pass of the hot drawing process are as follows: 880°C for the first pass, 870°C for the second pass, 860°C for the third pass, 850°C for the fourth pass, 840°C for the fifth pass, 830°C for the sixth pass, and 830°C for the seventh pass.

[0020] Preferably, in step In this process, the annealing temperature of the wire is 700℃.

[0021] The beneficial effects of this invention are: the preparation method has significant differences from the industrial titanium material preparation in terms of material selection, multi-process preparation (including upsetting, rolling, hot drawing and high frequency straightening), so that the prepared titanium bone needles have a better strength improvement effect.

[0022] The tensile strength of the titanium wires (bone needles) prepared by this invention is greater than [amount missing]. Compared to conventionally prepared titanium wires (bone needles), which have higher tensile strength, the titanium bone needles prepared in this invention can be made with a smaller outer diameter while ensuring sufficient strength and a smaller weight, thereby achieving a more precise treatment effect. At the same time, it can also effectively reduce excessive damage and discomfort to the patient's body. Furthermore, it can expand the patient's range of motion after treatment and can be widely used in orthopedic treatment. Attached Figure Description

[0023] Figure 1 This is a flowchart illustrating the manufacturing process of the high-strength titanium bone needle for medical use according to the present invention.

[0024] Figure 2 This is a schematic diagram of high-frequency straightening operation according to an embodiment of the present invention.

[0025] Figure 3 For the present invention Figure 2 Side view of the rotating straightening cylinder. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0027] Example 1

[0028] A method for manufacturing high-strength titanium bone needles for medical use includes the following steps:

[0029] S1. Material Selection: Select materials with the specified specifications. The titanium ingots must have the following composition percentage requirements: Al: 6.0, Fe: 0.18, V: 4.1, O: 0.16.

[0030] S2, Upsetting and Drawing

[0031] Will The titanium ingot is heated to 1100℃ and then upset in one go. Pull to ;

[0032] Second upset Pull to ;

[0033] Three upsets Pull to ;

[0034] And finally, it is preferred to upset and shape at 1050℃. .

[0035] S3. Forging: The forging process is carried out in two stages. The forging temperature of the first stage is 980℃ and the forging temperature of the second stage is 960℃.

[0036] S4. Grinding: Grinding the forged ingot into... The square material;

[0037] S5. Rolled square billet: Rolling temperature is 940℃, dimensional deformation range is... ;

[0038] S6. One-time rolled bar billet: rolled at 930℃ Black bar (ensuring the bar material structure is not overheated);

[0039] S7. Peeling and Grinding: After removing the outer skin of the rolled bar, the surface is ground to a minimum dimension. ;

[0040] S8, Secondary rolled bar billet: rolled at 910℃ Dimensions (to ensure the bar stock structure is not overheated);

[0041] S9. Wire Drawing: A seven-pass wire drawing process is employed, with the following temperatures for each pass: 875℃ for the first pass, 865℃ for the second, 855℃ for the third, 845℃ for the fourth, 835℃ for the fifth, 825℃ for the sixth, and 825℃ for the seventh. The necking at each pass is checked and ensured to be no less than 0.5mm. The final wire drawing process is completed to... Titanium wire.

[0042] S10, Titanium wire coiling and annealing: The titanium wire after seven drawing passes is coiled (coiled diameter between 650-700mm) and annealed at a temperature of 650℃.

[0043] S11, High-frequency wire straightening: The high-frequency straightening current is 19A, and the speed is... ;

[0044] This application uses the invention titled "An Ultra-High Frequency Wire Heat Treatment Device" (CN210596194U) to achieve high-frequency heating of the titanium wire in this application. In one embodiment, the high-frequency heating current is 19A. Under this current, the temperature transfer between the metal tube 4 and the insulating tube 7 is approximately 750°C. After the titanium wire passes through the insulating tube 7, the internal structure of the titanium wire is softened.

[0045] After being softened by high frequency and high temperature as described above, it is then subjected to... Figure 2-3 The straightening device shown performs a straightening operation. Its specific structure includes a rotating straightening cylinder 1 (which can rotate continuously during straightening via a belt 5). Inside the cylinder 1, there are upper straightening molds 21 and lower straightening molds 22 that are staggered vertically. Straightening grooves 201 are provided on the opposite surfaces of the two molds. The upper straightening molds 21 and lower straightening molds 22 can be moved closer or further apart by an adjusting screw 3 passing through the rotating straightening cylinder 1 to adjust the distance between them, thus adapting to the close-fitting straightening effect of titanium wires of different diameters.

[0046] Currently, although the straightness of the wire meets the requirements after cold straightening, its mechanical properties are substandard, mainly in terms of yield strength. Therefore, this application eliminates the mechanical stress generated by cold working by applying a suitable temperature during high-frequency straightening, and simultaneously obtains an optimal linear speed for straightening travel based on the test data recorded in the specification. By appropriately matching the heating temperature and current, and determining the linear velocity of the titanium wire, the high-frequency heating current and the achieved heating temperature are adjusted according to the diameter of the titanium wire to obtain the high strength required for medical titanium bone needles, while also meeting medical needs. The standard.

[0047] S12, Titanium wire annealing: The annealing temperature of titanium wire is 680℃.

[0048] Preferably, after high-frequency straightening of the wire, performance testing is also included, and the tensile strength of the titanium wire should be greater than [value missing]. After performance testing, the material is ground and machined, maintaining the diameter tolerance within a specified range. to Then, polishing and finishing are performed to maintain the smoothness of the titanium wire surface. Finally, the finished product is packaged.

[0049] Strength testing

[0050] As shown in Table 1, No. 01 represents the tensile test results of conventionally prepared titanium wire, and No. 02 represents the tensile test results of titanium wire prepared according to Example 1. Comparing the two, the tensile strength of the conventionally prepared titanium wire is... The tensile strength of the titanium wire prepared in Example 1 is Therefore, the tensile strength of the titanium wire (bone needle) prepared by the present invention is significantly higher than that of conventionally prepared titanium wire.

[0051]

[0052] Table 1

[0053] Example 2

[0054] A method for manufacturing high-strength titanium bone needles for medical use includes the following steps:

[0055] S1. Material Selection: Select materials with the specified specifications. The titanium ingots must have the following composition percentage requirements: Al: 6.2%, Fe: 0.16%, V: 3.9%, O: 0.17%.

[0056] S2, Upsetting and Drawing

[0057] Will The titanium ingot is heated to 1150℃ and then upset in one go. Pull to ;

[0058] Second upset Pull to ;

[0059] Three upsets Pull to ;

[0060] And finally, it is preferred to upset and shape at 1080℃ to... .

[0061] S3. Forging: The forging process is carried out in two stages. The forging temperature of the first stage is 985℃, and the forging temperature of the second stage is 970℃.

[0062] S4. Grinding: Grinding the forged ingot into... The square material;

[0063] S5. Rolled square billet: Rolling temperature is 945℃, dimensional deformation range is... ;

[0064] S6. One-time rolled bar billet: rolled at 940℃ Black bar (ensuring the bar material structure is not overheated);

[0065] S7. Peeling and Grinding: After removing the outer skin of the rolled bar, the surface is ground to a minimum dimension. ;

[0066] S8, Secondary rolled bar billet: rolled at 920℃ Dimensions (to ensure the bar stock structure is not overheated);

[0067] S9. Wire Drawing: A seven-pass wire drawing process is employed, with the following temperatures for each pass: 880℃ for the first pass, 870℃ for the second, 860℃ for the third, 850℃ for the fourth, 840℃ for the fifth, 830℃ for the sixth, and 830℃ for the seventh. The necking at each pass is checked and ensured to be no less than 0.5mm. The final wire drawing process is completed to... Titanium wire.

[0068] S10, Titanium wire coiling and annealing: The titanium wire after seven drawing passes is coiled (coiled diameter between 650-700mm) and annealed at a temperature of 680℃.

[0069] S11, High-frequency wire straightening: The high-frequency straightening current is 20A (at this current, the temperature reached by metal tube 4 is approximately 800℃), and the speed is... ;

[0070] S12, Titanium wire annealing: The annealing temperature of titanium wire is 700℃.

[0071] After high-frequency straightening is completed, the process includes performance testing, grinding and machining, polishing and finishing, and finished product packaging, just like in Example 1.

[0072] Strength testing

[0073] As shown in Table 2, No. 01 represents the tensile test results of conventionally prepared titanium wire, and No. 02 represents the tensile test results of titanium wire prepared according to Example 2. Comparing the two, the tensile strength of the conventionally prepared titanium wire is... The tensile strength of the titanium wire prepared in Example 2 is Therefore, the tensile strength of the titanium wire (bone needle) prepared by the present invention is significantly higher than that of conventionally prepared titanium wire.

[0074]

[0075] Table 2

[0076] Example 3

[0077] A method for manufacturing high-strength titanium bone needles for medical use includes the following steps:

[0078] S1. Material Selection: Select materials with the specified specifications. The titanium ingots must have the following composition percentage requirements: Al: 6.4%, Fe: 0.15%, V: 3.7%, O: 0.18%.

[0079] S2, Upsetting and Drawing

[0080] Will The titanium ingot is heated to 1200℃ and then upset in one go. Pull to ;

[0081] Second upset Pull to ;

[0082] Three upsets Pull to ;

[0083] And finally, it is preferred to upset and shape at 1100℃. .

[0084] S3. Forging: The forging process is carried out in two stages. The temperature of the first stage is 990℃ and the temperature of the second stage is 980℃.

[0085] S4. Grinding: Grinding the forged ingot into... The square material;

[0086] S5. Rolled square billet: Rolling temperature is 950℃, dimensional deformation range is... ;

[0087] S6. One-time rolled billet: rolled at 950℃ Black bar (ensuring the bar material structure is not overheated);

[0088] S7. Peeling and Grinding: After removing the outer skin of the rolled bar, the surface is ground to a minimum dimension. mm;

[0089] S8, Secondary rolled bar billet: rolled at 930℃ Dimensions (to ensure the bar stock structure is not overheated);

[0090] S9. Wire Drawing: A seven-pass wire drawing process is employed, with the following temperatures for each pass: 885℃ for the first pass, 875℃ for the second, 865℃ for the third, 855℃ for the fourth, 845℃ for the fifth, 835℃ for the sixth, and 835℃ for the seventh. The necking at each pass is checked and ensured to be no less than 0.5mm. The final wire drawing process is completed to... Titanium wire.

[0091] S10, Titanium wire coiling and annealing: The titanium wire after seven drawing passes is coiled (coiled diameter between 650-700mm) and annealed at a temperature of 700℃.

[0092] S11, High-frequency wire straightening: The high-frequency straightening current is 18A (at this current, the temperature reached by metal tube 4 is approximately 700℃), and the speed is... ;

[0093] S12, Titanium wire annealing: The annealing temperature of titanium wire is 690℃.

[0094] After high-frequency straightening is completed, the process includes performance testing, grinding and machining, polishing and finishing, and finished product packaging, just like in Example 1.

[0095] Strength testing

[0096] As shown in Table 3, No. 01 represents the tensile test results of conventionally prepared titanium wire, and No. 02 represents the tensile test results of titanium wire prepared according to Example 3. Comparing the two, the tensile strength of the conventionally prepared titanium wire is... The tensile strength of the titanium wire prepared in Example 3 is Therefore, the tensile strength of the titanium wire (bone needle) prepared by the present invention is significantly higher than that of conventionally prepared titanium wire.

[0097]

[0098] Table 3

[0099] In summary, the tensile strength of the titanium wires (bone needles) prepared by this invention is greater than that of [missing information]. Compared to conventionally prepared titanium wires (bone needles), which have higher tensile strength, the titanium bone needles prepared in this invention can be made with a smaller outer diameter while ensuring sufficient strength and a smaller weight, thereby achieving a more precise treatment effect. At the same time, it can also effectively reduce excessive damage and discomfort to the patient's body, and on this basis, it can also expand the patient's range of motion after treatment.

[0100] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A method for processing high-strength titanium bone needles for medical use, characterized in that, Includes the following steps: S1. Material Selection: Select titanium ingots with the following composition percentage requirements: Al: 6.0-6.4%, Fe: 0.15-0.18%, V: 3.7-4.1%, O: 0.16-0.18%. S2. Upsetting and drawing: The process is three-stage upsetting and three-stage drawing, with an upsetting and drawing temperature of 1100-1200℃. S3. Forging: The forging process is carried out in two stages. The temperature of the first stage is 980-990℃, and the temperature of the second stage is 960-980℃. S4. Grinding: Grinding the forged ingot into square pieces with equal length and width. S5. Rolled square billet: Rolling temperature is 940-950℃; S6. One-time rolled billet: rolling temperature is 930-950℃; S7. Peeling and Grinding: After removing the outer skin of the rolled bar, the surface is ground. S8. Secondary rolled bar billet: Rolling temperature is 910-930℃; S9. Wire drawing: Seven-pass wire drawing is used, with each pass having a necking of not less than 0.5mm. S10, Titanium wire coil annealing: The annealing temperature of the wire is 650-700℃; S11, High-frequency wire straightening: The current for high-frequency straightening is 18-20A, and the speed is 9m / min; S12. Annealing of titanium wire: The annealing temperature of titanium wire is 680-700℃.

2. The method for processing a high-strength titanium bone needle for medical use according to claim 1, characterized in that: In step S9, the wire drawing is a hot wire drawing process, with the first wire drawing temperature being 875-885℃, the second wire drawing temperature being 865-875℃, the third wire drawing temperature being 855-865℃, the fourth wire drawing temperature being 845-855℃, the fifth wire drawing temperature being 835-845℃, the sixth wire drawing temperature being 825-835℃, and the seventh wire drawing temperature being 825-835℃.

3. The method for processing high-strength titanium bone needles for medical use according to claim 2, characterized in that, The drawing temperatures for each pass of the hot drawing process are as follows: 880℃ for the first pass, 870℃ for the second pass, 860℃ for the third pass, 850℃ for the fourth pass, 840℃ for the fifth pass, 830℃ for the sixth pass, and 830℃ for the seventh pass.

4. The method for processing a high-strength titanium bone needle for medical use according to claim 3, characterized in that, In step S10, the annealing temperature of the wire is 700°C.

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