Preparation method of high-precision and high-performance titanium alloy woven watchband wire and wire

Abstract

The invention relates to a preparation method of a high-precision and high-performance titanium alloy woven watchband wire. The preparation method at least comprises the following steps: S1, preparing a wire blank, wherein the wire blank comprises the following components in percentage by mass: 5.50-6.75% of Al; v: 3.50% to 4.50%; o: < = 0.2%; less than or equal to 0.4% of Fe; and the balance of Ti. S2, rolling is conducted, specifically, the wire rod blank containing the components is rolled into a wire material; a surface oxide layer and impurities are removed through a peeling mold, the surface quality is improved, and it is guaranteed that the roundness of the wire is smaller than or equal to 0.01 mm; s4, polishing is conducted, specifically, the wire is subjected to polishing treatment, so that the surface roughness of the wire is smaller than or equal to Ra 0.5 micron; and S5, annealing treatment is conducted, specifically, the polished wire is subjected to annealing treatment, during annealing, through a tension swing take-up and pay-off device, the front-back tension of the wire is adjusted and controlled to be 500-750 N, the annealing temperature is 750-800 DEG C, the online annealing time is 15 min, the internal stress of the material is removed, the material strength is reduced, and the finished wire with the material strength being 290-350 HV is prepared.

Description

Technical Field

[0001] The present invention relates to the technical field of titanium alloy manufacturing, and particularly to a preparation method and wire of a high-precision and high-performance titanium alloy braided watchband wire. Background Art

[0002] Metal braided watchbands, originating from the traditional handicrafts of Milan, Italy, have become a classic element in the fashion and watchmaking fields with their unique weaving techniques, diverse color and material choices, good comfort and durability, and the ability to fit various watch styles. From high-end luxury goods to modern smart watches, metal braided watchbands are deeply loved and pursued by consumers worldwide with their unique charm.

[0003] The materials mainly used for traditional watchband weaving are stainless steel. With the pursuit of high-quality and lightweight metals by people, titanium alloy materials have been widely concerned due to their high strength, low density, and corrosion resistance. However, due to the complexity of the watchband weaving process, its requirements for the ductility, surface finish, and dimensional accuracy of metal materials are very high, which has become a current technical difficulty. Summary of the Invention

[0004] The purpose of the present invention is to overcome the defects existing in the prior art and provide a preparation method and wire of a high-precision and high-performance titanium alloy braided watchband wire.

[0005] To achieve the above purpose, the technical solution of the present invention is to design a preparation method of a high-precision and high-performance titanium alloy braided watchband wire, which is characterized by including at least the following steps: S1 Prepare wire blank: The component mass percentage of the wire blank is: Al: 5.50% - 6.75%; V: 3.50% - 4.50%; O: ≤0.2%; Fe: ≤0.4%; the rest is Ti; S2 Rolling: Roll the wire blank with the above components into a wire; S3 Skinning: Remove surface defects through a skinning die and ensure that the roundness of the wire reaches ≤0.01 mm; S4 Polishing: Perform a polishing treatment on the wire to make the surface roughness of the wire reach ≤Ra0.5 μm; S5 Annealing treatment: Perform an annealing treatment on the polished wire. During annealing, adjust and control the front and rear tensions of the wire to be 500 - 750 N through a tension swing take-up and pay-off device, the annealing temperature is 750 - 800 °C, and the in-line annealing time is 15 min to remove the internal stress of the material and reduce the material strength, and prepare a finished wire with a material strength of 290 - 350 HV.

[0006] A further preferred technical solution is that in step S1, the wire blank contains one or more of the following components in the following mass percentages: C: ≤0.08%; N: ≤0.05%; H: ≤0.015%.

[0007] A further preferred technical solution is that in step S1, the wire blank is made into a wire blank with a diameter of 5 mm.

[0008] A further preferred technical solution is that in step S2, the titanium alloy wire blank is continuously rolled 1 to 18 times to form the titanium alloy wire; the single-pass reduction rate of rolling is controlled to be 10 - 20%, and the rolling speed is 25 - 40 m / min.

[0009] A further preferred technical solution is that the titanium alloy wire blank is continuously rolled 10 times through four sets of rolls, so that the diameter of the titanium alloy wire blank is rolled from 5.0 mm to 1.65 mm, the diameter accuracy is controlled to be 0.02 mm, and the roundness is 0.03 mm. Then the titanium alloy wire blank is continuously rolled 8 times through two sets of rolls, so that the diameter of the titanium alloy wire blank is rolled from 1.65 mm to 0.92 mm, the diameter accuracy is controlled to be 0.01 mm, and the roundness is 0.015 mm.

[0010] A further preferred technical solution is that the four sets of rolls include two groups of rolls, each group of rolls is composed of four rolls arranged in a cross, and an arc-shaped rolling surface matching the rolling diameter is provided on the outer periphery of each roll. The two groups of rolls are arranged front and back and are arranged in a 45-degree cross; The two sets of rolls include one group of rolls, each group of rolls is composed of four rolls arranged in a cross, and an arc-shaped rolling surface matching the rolling diameter is provided on the outer periphery of each roll. Several groups of two sets of rolls are arranged front and back and are arranged in a 15-degree cross.

[0011] A further preferred technical solution is that in step S3, the titanium alloy wire is successively passed through two peeling dies to remove the surface material, ensuring that the roundness is 0.01 mm and the diameter accuracy is 0.01 mm, and the peeling speed is 15 - 25 m / min.

[0012] A further preferred technical solution is that in step S4, the titanium alloy wire is polished by a combination of several groups of 600-mesh abrasive belts and several groups of 1000-mesh abrasive belts to ensure a smooth surface, achieving a surface roughness ≤ Ra0.5 μm.

[0013] A further preferred technical solution is that each group of abrasive belts includes at least two abrasive belts, and the two abrasive belts are arranged front and back and are arranged in a cross.

[0014] A high-precision and high-performance titanium alloy braided watchband wire, which is made by the preparation method of the high-precision and high-performance titanium alloy braided watchband wire described in any one of the above.

[0015] The advantages and beneficial effects of the present invention are as follows: control and research are carried out on the heat treatment process, cold drawing, peeling, polishing and other technologies of high-precision and high-performance titanium alloy, so that the dimensional accuracy of the 0.85mm titanium alloy wire with high precision and high performance is higher, reaching ±0.01mm. Through the polishing process, the surface roughness of the 0.85mm titanium alloy wire with high precision and high performance reaches within Ra0.5. By optimizing the titanium alloy annealing parameter of 775°C, the ductility of the 0.85mm titanium alloy wire with high precision and high performance is improved. Brief Description of the Drawings

[0016] Figure 1 It is a flow chart of the present invention; Figure 2 It is a schematic diagram of four rolls of the present invention; Figure 3 It is a schematic diagram of a sanding belt of the present invention; Figure 4 It is a schematic diagram of a tension swing type pay-off and take-up device of the present invention; Figure 5 It is a partial schematic diagram of a tension swing type pay-off and take-up device of the present invention.

[0017] In the figure: 10, four rolls; 11, roll; 20, telescopic seat; 30, tension swing type pay-off and take-up device; 31, annealing furnace; 32, coiler; 33, front guide wheel; 34, guide wheel; 35, rear guide wheel; 36, lever guide wheel; 361, slider; 362, lever guide wheel shaft; 37, lever; 371, fixed rotating shaft; 372, guide groove; 373, tension indication scale; 38, pay-off; 39, counterweight; 391, fastening screw; 40, limiting member; 41, adjusting rod. Detailed Embodiments

[0018] The following will further describe the detailed embodiments of the present invention in conjunction with the drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and cannot be used to limit the protection scope of the present invention.

[0019] As Figure 1 shown, a preparation method for high-precision and high-performance titanium alloy braided watchband wire includes at least the following steps: S1 Prepare wire stock: The mass percentage of the components of the wire stock is: Al: 5.50% - 6.75%; V: 3.50% - 4.50%; O: ≤0.2%; Fe: ≤0.4%; the rest is Ti; S2 Rolling: Roll the wire stock with the above components into wire. S3 Peeling: Remove the surface oxide layer and impurities through a peeling die to improve the surface quality and ensure that the roundness of the wire reaches ≤0.01mm; S4 Polishing: The wire is polished so that the surface roughness of the wire reaches ≤ Ra0.5μm; S5 Annealing treatment: The polished wire is annealed. During annealing, the front and rear tensions of the wire are adjusted and controlled to be 500 - 750N through a tension swing pay-off and take-up device. The annealing temperature is 750 - 800°C, and the on-line annealing time is 15 minutes to remove the internal stress of the material and reduce the material strength. A finished wire with a material strength of 290 - 350HV is prepared.

[0020] Preferably, the composition of the wire rod blank contains one or more of the following mass percentage components: C: ≤ 0.08%; N: ≤ 0.05%; H: ≤ 0.015%.

[0021] The geometric tolerances and mechanical properties such as the roundness, surface roughness, and material strength of the titanium alloy wire are interrelated and cross-influenced with the material composition and processing method of the titanium alloy wire. For example, with the same polishing method, the surface roughness of the titanium alloy wire is affected by the material composition of the titanium alloy and the roundness of the titanium alloy wire before polishing. The higher the roundness of the titanium alloy wire, the higher the quality of the surface roughness after polishing. When the roundness of the titanium alloy wire meets certain requirements, the surface roughness is related to the mechanical properties of the titanium alloy wire. When the strength and plasticity of the titanium alloy wire are moderate, the quality of the surface roughness of the titanium alloy wire after polishing in the same way is higher; The roundness of the titanium alloy wire is also affected in the same way. In the same rolling or peeling process, due to the different compositions of the titanium alloy wire, the roundness of the titanium alloy wire may be different. Therefore, each step in the composition and preparation method of the titanium alloy wire is interrelated and cross-influenced.

[0022] Furthermore, in step S1, the wire rod blank with the following component mass percentages: Al: 5.50% - 6.75%; V: 3.50% - 4.50%; O: ≤ 0.2%; Fe: ≤ 0.4%; the rest is Ti is prepared into a wire rod blank with a diameter of 5mm to meet the requirement that the reduction per pass in the subsequent rolling step is controlled within 10 - 20%, and to ensure that the roundness of the wire reaches ≤ 0.01mm and the surface roughness of the wire reaches ≤ Ra0.5μm.

[0023] Furthermore, in step S2, the titanium alloy wire rod blank is continuously rolled 1 - 18 times to form the titanium alloy wire; the reduction rate per pass of rolling is controlled at 10 - 20%, and the rolling speed is 25 - 40m / min; Specifically, as Figure 2As shown, the titanium alloy wire blank is continuously rolled 10 times through the four-roll mill 10, so that the diameter of the titanium alloy wire blank is rolled from 5.0 mm to 1.65 mm, the diameter accuracy is controlled to be 0.02 mm, and the roundness is 0.03 mm to ensure true roundness, obtaining a titanium alloy wire; the four-roll mill 10 includes two groups of rolls 11, and each group of rolls 11 is composed of four rolls 11 in a cross arrangement. An arc rolling surface matching the rolling diameter is provided on the outer periphery of each roll 11. In one embodiment, the two groups of rolls 11 are arranged in a front-back array, and the front and rear rolls 11 have the same structure. The titanium alloy wire is continuously rolled to ensure the reduction ratio and roundness of each pass. In another embodiment, in order to obtain better roundness, the two groups of rolls 11 are arranged front and back and cross at 45 degrees. In this way, at the rolling joint of two adjacent rolls 11 of the front four-roll mill 10, it will be directly rolled by one roll 11 of the rear four-roll mill 10, which can improve the diameter accuracy and roundness of a single pass.

[0024] The titanium alloy wire blank is then continuously rolled 8 times through the two-roll mill, so that the diameter of the titanium alloy wire blank is rolled from 1.65 mm to 0.92 mm, the diameter accuracy is controlled to be 0.01 mm, and the roundness is 0.015 mm to ensure the accuracy and uniformity of the diameter. The two-roll mill includes a group of rolls 11, and each group of rolls 11 is composed of four rolls in a cross arrangement. An arc rolling surface matching the rolling diameter is provided on the outer periphery of each roll 11. In one embodiment, eight groups of rolls 11 are arranged in a front-back array to continuously roll the titanium alloy wire to ensure the reduction ratio and roundness of each pass. In another embodiment, in order to obtain better roundness, eight groups of rolls 11 are arranged front and back and cross at 15 degrees. In this way, at the rolling joint of two adjacent rolls 11 of the front two-roll mill, it will be directly rolled by one roll 11 of the rear two-roll mill, which can improve the diameter accuracy and roundness.

[0025] Further, in step S3, the titanium alloy wire is successively passed through two peeling dies to remove the surface material, ensuring that the roundness is 0.01 mm and the diameter accuracy is 0.01 mm, and the peeling speed is 15 - 25 m / min; the titanium alloy wire is passed through a peeling die with a diameter of 0.88 ± 0.01 mm, which can remove the residual oxide layer on the surface; then passed through a peeling die with a diameter of 0.86 ± 0.01 mm to remove the surface defects of the material, and then linked with the ultrasonic cleaning equipment, and the laser diameter gauge controls the diameter size, so as to achieve the dimensional accuracy and material cleanliness of this process and prepare for the next polishing; Further, as Figure 3As shown, in step S4, the titanium alloy wire is polished by combining several groups of 600-mesh abrasive belts 20 and several groups of 1000-mesh abrasive belts 20 to ensure a smooth surface with a surface roughness of ≤ Ra 0.5 μm. Specifically, each group of abrasive belts 20 includes at least two abrasive belts 20. To obtain a better surface roughness, the two abrasive belts 20 are arranged one after the other and crosswise. In this way, the two abrasive belts 20 cover the entire outer peripheral surface of the titanium alloy wire to ensure uniform polishing. In a preferred embodiment, the titanium alloy wire is polished by combining four groups of 600-mesh abrasive belts 20 and four groups of 1000-mesh abrasive belts 20. The adjacent two groups of abrasive belts 20 are also crosswise arranged, preferably in a cross shape. The titanium alloy wire passes through 8 groups of abrasive belts 20 in sequence, which can make the surface roughness of the titanium alloy wire ≤ 0.3 μm.

[0026] Further, in step S5, the titanium alloy wire is passed through several groups of annealing furnaces in sequence for on-line annealing. The annealing temperature is 750 - 800 °C, the annealing speed is 2 - 3 m / min, and water cooling is used. The front and rear tensions of the material are adjusted and controlled by a self-designed tension swing type pay-off and take-up device. As Figure 4 and Figure 5As shown, the tension swing pay-off and take-up device 30 includes a winder 32 disposed at the front of the annealing furnace 31. A front guide wheel shaft is provided at the front end of the winder 32, and a front guide wheel 33 is provided on the front guide wheel shaft. A pair of guide wheels 34 are provided at the front end of the front guide wheel 33. It also includes a pay-off machine 38 disposed at the rear of the annealing furnace. A rear guide wheel 35 is provided at the front end of the pay-off machine 38. A fixed rotating shaft 371 and a lever 37 are provided between the rear guide wheel 35 and the pay-off machine 38. The lever 37 is movably connected to the annealing furnace 31 through the fixed rotating shaft 371 and can swing around the fixed rotating shaft 371. One end of the lever 37 is provided with a lever guide wheel shaft 362, and a lever guide wheel 36 is provided on the lever guide wheel shaft 362. A counterweight 39 is provided at the other end of the lever 37. The counterweight 39 is movably installed on the lever 37, and a fastening screw 391 is provided on the counterweight 39. With such a design, the counterweight 39 can be easily adjusted and fastened conveniently. The usage method of this device is as follows: 1. First, install this device at both ends of the annealing furnace 31 before use; 2. Initially adjust the position of the counterweight 39 on the lever 37 by loosening and tightening the fastening screw 391 on the counterweight 39 to make the lever 37 in a balanced position; 3. Wind the titanium alloy wire around the front guide wheel 33, the lever guide wheel 36, and the rear guide wheel 35; 4. Start the winder 32, and according to the production process requirements of the titanium alloy wire, use a handheld tensiometer to measure the tension of the titanium alloy wire. The position of the counterweight 39 on the lever 37 can be finely adjusted to make the lever 37 in a balanced position; 5. After finely adjusting the position of the counterweight 39 on the lever 37 to make the lever 37 in a balanced position, the automatic adjustment of the tension during the production process of the titanium alloy wire can be realized by using a simple lever principle.

[0027] Further, in order to realize the on-line continuous measurement and automatic adjustment of the tension, a guide groove 372 is provided along the entire length direction on the lever 37. A tension indicating scale 373 is provided on the lever 37 on one side of the guide groove 372. The lever guide wheel 36 is installed on the slider 361 through a wheel shaft. The slider 361 is slidably installed in the guide groove 372 of the lever 37 and can be locked on the lever 37 by a screw. With such a design, the position of the adjusting lever guide wheel 36 can be visually displayed, and the on-line continuous automatic adjustment of the tension can be realized. Moreover, a tension indicating scale 373 is also provided on the lever 37 corresponding to the counterweight 39, which can visually display the screwing depth of the fastening screw 391 and adjust the distance between the counterweight 39 and the center of the fixed rotating shaft, facilitating the adjustment of the counterweight and realizing the adjustment of the tension.

[0028] Further, a limiting member 40 is provided above the lever 37. The limiting member 40 is movably mounted on the bracket of the annealing furnace 31 above the lever 37 through an adjusting rod 41. The limiting member 40 is of a U-shaped structure and is buckled above the lever 37, which can prevent the lever guide wheel 36 from being lifted by the take-up machine 32 to cause imbalance. At the same time, it can keep the tension mechanism within a certain range. Since the titanium alloy wire passes around the lower part of the lever guide wheel 36 and then enters the annealing furnace through the rear guide wheel, the lever guide wheel 36 is subjected to an upward pulling force. Therefore, only the limiting member 40 is provided above the lever 37.

[0029] In order to ensure that the material is heated evenly without residual stress during annealing and reduce the material strength to 290 - 350 HV, argon is supplemented in the furnace, and the argon gas flow rate is 15 - 20 NL / min to ensure that there is no residual oxide layer during the annealing process.

[0030] In one embodiment, a method for preparing a high-precision and high-performance titanium alloy braided watchband wire with a diameter of 0.85 mm: Prepare a wire blank, and prepare the wire blank with a composition mass percentage of: Al: 5.50%; V: 3.50%; O: ≤0.2%; Fe: ≤0.4%; C: ≤0.08%; N: ≤0.05%; and the rest is Ti into a wire blank with a diameter of 5 mm. Rolling: The above-mentioned wire blank with the above composition and a diameter of 5 mm is rolled 12 times, the single-pass compression ratio of rolling is controlled to be 20%, and the rolling speed is 25 m / min. The titanium alloy wire blank is continuously rolled 8 times through four-pass rolling mills, so that the diameter of the titanium alloy wire blank is rolled from 5.0 mm to 1.65 mm, and the diameter accuracy is controlled to be 0.02 mm and the roundness is 0.03 mm; it is continuously rolled 4 times through two-pass rolling mills, so that the diameter of the titanium alloy wire blank is rolled from 1.65 mm to 0.92 mm, and the diameter accuracy is controlled to be 0.01 mm and the roundness is 0.015 mm to ensure the accuracy and uniformity of the diameter. Skinning: The titanium alloy wire passes through two skinning dies in sequence to remove the surface material, ensuring a roundness of 0.01 mm and a diameter accuracy of 0.01 mm, and the skinning speed is 15 m / min; the titanium alloy wire passes through a skinning die with a diameter of 0.88 mm, which can remove the residual oxide layer on the surface; and then passes through a skinning die with a diameter of 0.86 mm to remove the surface defects of the material. Polishing: The titanium alloy wire is polished by a combination of four groups of 600-mesh abrasive belts and four groups of 1000-mesh abrasive belts. The adjacent two groups of abrasive belts are also arranged in a cross pattern, preferably a cross pattern. The titanium alloy wire passes through 8 groups of abrasive belts in sequence, so that the surface roughness of the titanium alloy wire ≤ Ra 0.5 μm, and the diameter of the titanium alloy wire is 0.851 mm. Annealing treatment: The polished wire is subjected to annealing treatment. During annealing, the front and rear tensions of the wire are adjusted and controlled to be 500 N through a tension swing pay-off and take-up device. Annealing temperature: 775 °C, in-line annealing time: 15 min. The internal stress of the material is removed, and the material strength is reduced. The material strength of the wire is 290 HV, and the finished wire is produced.

[0031] In another embodiment, a method for preparing a high-precision and high-performance titanium alloy braided watchband wire with a diameter of 0.85 mm: Prepare a wire blank. The wire blank with the following component mass percentages: Al: 5.85%; V: 3.95%; O: ≤0.2%; Fe: ≤0.4%; C: ≤0.03%; N: ≤0.02%; H: ≤0.015%; the rest is Ti is prepared into a wire blank with a diameter of 5 mm. Rolling: The wire blank with the above composition and a diameter of 5 mm is rolled 18 times. The single-pass reduction rate of rolling is controlled to be 10%, and the rolling speed is 40 m / min. The titanium alloy wire blank is continuously rolled 10 times through four-pass rolls, so that the diameter of the titanium alloy wire blank is rolled from 5.0 mm to 1.65 mm, and the diameter accuracy is controlled to be 0.02 mm, and the roundness is 0.03 mm; then it is continuously rolled 8 times through two-pass rolls, so that the diameter of the titanium alloy wire blank is rolled from 1.65 mm to 0.92 mm, and the diameter accuracy is controlled to be 0.01 mm, and the roundness is 0.015 mm, ensuring the accuracy and uniformity of the diameter. Skinning: The titanium alloy wire passes through two skinning dies in sequence to remove the surface material, ensuring a roundness of 0.01 mm and a diameter accuracy of 0.01 mm, and the skinning speed is 40 m / min; the titanium alloy wire passes through a skinning die with a diameter of 0.88 mm, which can remove the residual oxide layer on the surface; and then through a skinning die with a diameter of 0.86 mm to remove the surface defects of the material. Polishing: The titanium alloy wire is polished by a combination of four groups of 600-mesh abrasive belts and four groups of 1000-mesh abrasive belts. The adjacent two groups of abrasive belts are also arranged in a cross pattern, preferably a cross pattern. The titanium alloy wire passes through 8 groups of abrasive belts in sequence, and the surface roughness of the titanium alloy wire can be ≤Ra0.3 μm. The diameter of the titanium alloy wire is 0.851 mm. Annealing treatment: The polished wire is subjected to annealing treatment. During annealing, the front and rear tensions of the wire are adjusted and controlled to be 700 N through a tension swing pay-off and take-up device. Annealing temperature: 800 °C, in-line annealing time 15 min, water cooling. Argon is supplemented in the furnace, and the argon gas flow rate is 15 NL / min to ensure that there is no residual oxide layer during the annealing process. The internal stress of the material is removed, and the material strength is reduced. The material strength of the wire is 350 HV, and the finished wire is produced.

[0032] 1. The surface of the high-precision and high-performance titanium alloy wire prepared by using this invention is smooth, the dimensional uniformity is good, the elongation rate is high, and the mechanical properties are as follows in the table:

[0033] 2. The process of the high-precision and high-performance titanium alloy wire prepared by this invention can effectively save labor and simplify the traditional wire drawing process, so as to achieve the purpose of improving production capacity and reducing costs.

[0034] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and retouches can still be made, and these improvements and retouches should also be regarded as the protection scope of the present invention.

Claims

1. Preparation method of high-precision and high-performance titanium alloy braided watchband wire, characterized in that, It includes at least the following steps: S1 Prepare a wire blank: The mass percentage of the components of the wire blank is as follows: Al: 5.50% - 6.75%; V: 3.50% - 4.50%; O: ≤0.2%; Fe: ≤0.4%; the rest is Ti; S2 Rolling: Roll the wire blank with the above components into a wire; S3 Skinning: Remove surface defects through a skinning die and ensure that the roundness of the wire reaches ≤0.01 mm; S4 Polishing: Perform a polishing treatment on the wire to make the surface roughness of the wire reach ≤Ra0.5 μm; S5 Annealing treatment: Perform an annealing treatment on the polished wire. During annealing, adjust and control the front and rear tensions of the wire to be 500 - 750 N through a tension swing take-up and pay-off device, the annealing temperature: 750 - 800 °C, and the on-line annealing time is 15 min to prepare a finished wire with a material strength of 290 - 350 HV for the wire; 2. The preparation method of the high-precision and high-performance titanium alloy braided watchband wire according to claim 1, characterized in that, In step S1, the mass percentage of one or more of the following components in the composition of the wire blank is: C: ≤0.08%; N: ≤0.05%; H: ≤0.015%.

3. The preparation method of the high-precision and high-performance titanium alloy braided watchband wire according to claim 1 or 2, characterized in that, In step S1, prepare the wire blank into a wire blank with a diameter of 5 mm.

4. The preparation method of the wire for the high-precision and high-performance titanium alloy braided watchband according to claim 1, characterized in that, In step S2, continuously roll the titanium alloy wire blank 1 - 18 times to form the titanium alloy wire; control the single-pass reduction rate of rolling to be 10 - 20%, and the rolling speed to be 25 - 40 m / min.

5. The preparation method of the wire for the high-precision and high-performance titanium alloy woven watchband according to claim 4, characterized in that Continuously roll the titanium alloy wire blank 10 times through four-rolls, so that the diameter of the titanium alloy wire blank is rolled from 5.0 mm to 1.65 mm, control the diameter accuracy to be 0.02 mm, and the roundness to be 0.03 mm. Then roll the titanium alloy wire blank 8 times through two-rolls, so that the diameter of the titanium alloy wire blank is rolled from 1.65 mm to 0.92 mm, control the diameter accuracy to be 0.01 mm, and the roundness to be 0.015 mm.

6. The preparation method of the high-precision and high-performance titanium alloy braided watchband wire according to claim 5, characterized in that, The four-rolls include two groups of rolls. Each group of rolls is composed of four rolls arranged in a cross. An arc-shaped rolling surface matching the rolling diameter is provided on the outer periphery of each roll. The two groups of rolls are arranged front and back and cross at 45 degrees; The two-rolls include one group of rolls. Each group of rolls is composed of four rolls arranged in a cross. An arc-shaped rolling surface matching the rolling diameter is provided on the outer periphery of each roll. Several groups of two-rolls are arranged front and back and cross at 15 degrees.

7. The preparation method of the high-precision and high-performance titanium alloy braided watchband wire according to claim 1, characterized in that, In step S3, pass the titanium alloy wire through two skinning dies in sequence to remove the surface material, ensure the roundness is 0.01 mm and the diameter accuracy is 0.01 mm, and the skinning speed is 15 - 25 m / min.

8. The preparation method of the high-precision and high-performance titanium alloy braided watchband wire according to claim 1, wherein, In step S4, polish the titanium alloy wire through a combination of several groups of 600-mesh abrasive belts and several groups of 1000-mesh abrasive belts to achieve a surface roughness ≤Ra0.5 μm.

9. The preparation method of the high-precision and high-performance titanium alloy braided watchband wire according to claim 8, characterized in that Each group of abrasive belts includes at least two abrasive belts. The two abrasive belts are arranged front and back and cross.

10. A high-precision and high-performance titanium alloy braided watchband wire, characterized in that, A wire prepared by the preparation method of the high-precision and high-performance titanium alloy braided watchband wire according to any one of claims 1 - 9.

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