Nickel-titanium alloy-wound metal wire and process

Abstract

The present invention relates to the technical field of nickel-titanium alloy processing. Provided are a nickel-titanium alloy-wound metal wire and a process. The nickel-titanium alloy-wound metal wire comprises a primary nickel-titanium wire, the outer wall of the primary nickel-titanium wire being fixedly connected to a protective film, and the outer wall of the protective film being fixedly connected to a copper foil. The process comprises: preparing required materials, including a hot-melt PU adhesive, a primary nickel-titanium wire, a copper foil, a protective film and a coating tool; according to design requirements, cutting the copper foil into small pieces or shapes of a required size, and ensuring that the surfaces thereof are smooth and clean; heating same in a heat treatment furnace to bond the hot-melt PU adhesive to the primary nickel-titanium wire; by means of controlling the heating temperature and time of the heat treatment furnace during bonding of the hot-melt PU adhesive to the primary nickel-titanium wire and then by means of a friction force between the copper foil and silicone, spirally winding the copper foil onto the protective film; controlling again the heating temperature and time of the heat treatment furnace, bonding the hot-melt PU adhesive to the copper foil; and after cooling, cutting same into a required length, and ensuring cut surfaces to be smooth, thus preventing raw materials from exposing and puncturing rubber coatings.

Description

A nickel-titanium alloy winding wire and process Technical Field

[0001] The present invention relates to the technical field of nickel-titanium alloy winding wire processing, in particular to a nickel-titanium alloy winding wire and a process thereof. Background Art

[0002] Nickel-titanium alloy is an alloy with shape memory and superelastic properties. It can change shape when subjected to external stimuli (such as temperature changes) and can return to its original shape. This property makes nickel-titanium alloy widely used in many application fields, including electronics, medical treatment, aerospace, etc. The current main industrial production method of nickel-titanium alloy is the melting and casting method. The melting and casting method uses sponge titanium as raw material and adds nickel according to the alloy composition for melting. Electron beam, argon arc plasma beam melting equipment is usually used for the melting process, including material preparation, electrode preparation, primary vacuum consumable melting, secondary melting, blanking forging, secondary forging, rolling or extrusion, etc., and finally the finished product is obtained.

[0003] Due to the strong sensitivity of nickel-titanium alloy to composition and processing, the smelting and processing control of nickel-titanium alloy is relatively difficult, resulting in high processing costs and long production cycles. In addition, after long-term use, the bending life of the nickel-titanium wire of nickel-titanium alloy is limited, and it will break after the life is exceeded. After the breakage, the nickel-titanium wire still remains inside the wire, and continued use can easily puncture the rubber, causing an internal short circuit in the charging cable. Therefore, the present invention proposes a nickel-titanium alloy winding metal wire and process.

[0004] Summary of the Invention

[0005] In response to the shortcomings of the existing technology, the present invention provides a nickel-titanium alloy winding metal wire and process, which solves the problem that the smelting and processing control of nickel-titanium alloy is difficult due to its strong sensitivity to composition and processing, resulting in high processing costs and long production cycles. In addition, after long-term use, the nickel-titanium wire has a bending lifespan and will break after exceeding the lifespan. After breaking, the nickel-titanium wire will still remain inside the wire, and continued use will easily puncture the rubber, causing an internal short circuit in the charging cable.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a nickel-titanium alloy wire winding process, including an original nickel-titanium wire, the outer wall of the original nickel-titanium wire is fixedly connected to a protective film, and the outer wall of the protective film is fixedly connected to a copper foil.

[0007] Preferably, a process for winding a nickel-titanium alloy wire comprises the following raw materials: hot melt Pu glue, original nickel-titanium wire, copper foil and protective film.

[0008] Preferably, the method comprises the following steps:

[0009] S1. Prepare the required materials, hot melt Pu glue, original nickel titanium wire, copper foil, protective film and coating tools. According to the design requirements, cut the copper foil into small pieces of the required size or shape, and ensure the surface is smooth. Heat it in a heat treatment furnace to combine the hot melt Pu glue and the original nickel titanium wire;

[0010] After S2 and S1, use a coating tool to evenly coat the protective film on the surface of the copper foil, ensuring that the protective film completely covers the copper foil and there are no obvious bubbles or defects;

[0011] After S3 and S2 are completed, the copper foil coated with the protective film is placed in a drying device to dry the protective film. Next, the original nickel-titanium wire is trimmed and pre-treated. An automatic winding machine or manual operation is used. The copper foil is then wound on the protective film in a spiral manner through the friction between the copper foil and the silica gel. The copper foil is then heated in a heat treatment furnace to bond the hot melt Pu adhesive to the copper foil.

[0012] After S4 and S3, clean the outer wall of the original nickel-titanium wire and wind the Pu protective film in the same way as the copper foil in a spiral. The copper foil cannot overlap, but the protective film can overlap by 20%-40%. The rotation direction of the protective film needs to be opposite to that of the copper foil.

[0013] After S5 and S4, weld the two ends of the nickel-titanium wire to other electronic components, or make appropriate connections as needed to complete the circuit connection. Test the finished product to ensure the quality of the wire winding and the stability of the connection, and make corrections or optimizations as needed.

[0014] Preferably, if the quality of the nickel-titanium wire fails the finished product inspection, the process returns to the copper foil winding operation step for repair. If the quality of the nickel-titanium wire passes the finished product inspection, the next step of processing and cutting is performed. By rotary cutting, the flatness of the cut surface of the nickel-titanium wire is ensured to be within 0.03 mm.

[0015] Preferably, the temperature of the heat treatment furnace in S1 is 80-200° C. and the time is 5-30 seconds, and the temperature of the heat treatment furnace in S3 is 80-200° C. and the time is 5-30 seconds.

[0016] Preferably, the temperature of drying the protective film in S3 is controlled at 100-150° C., and the time is controlled at 20-30 minutes.

[0017] Preferably, the cleaning solution used for cleaning in S4 is prepared according to the following types and proportions: 30 parts of purified water, 3-5 parts of surfactant, 1-2 parts of sodium tripolyphosphate, 2-4 parts of ammonia water, 2-4 parts of acetic acid, 1-2 parts of anhydrous sodium sulfate, 1-2 parts of buffer, 0.6-1.5 parts of preservative, and 0.5-1 part of deionized water.

[0018] Preferably, the temperature during welding in S5 is controlled at 80-100° C., argon with a purity of ≥99% is used as the shielding gas, and the gas flow rate is controlled at 8-12 L / min; the original nickel-titanium wire obtained through the above steps is placed in an electric furnace at a temperature of 300-450° C., and after the temperature of the original nickel-titanium wire reaches the furnace temperature, the original nickel-titanium wire is taken out of the furnace and immediately immersed in water at a temperature of 3-6° C. for 30-50 seconds for water cooling.

[0019] The present invention provides a nickel-titanium alloy wire winding process and has the following beneficial effects:

[0020] The present invention controls the temperature and time of the heat treatment furnace when the hot-melt Pu glue is combined with the original nickel-titanium wire, and then uses the friction between the copper foil and the silicone to wrap the copper foil around the protective film in a spiral manner. The temperature and time of the heat treatment furnace are controlled again to combine the hot-melt Pu glue and the copper foil. After cooling, the hot-melt Pu glue is cut into the required length, and the overlapping ratio of the Pu glue and the protective film is controlled. The Pu protective film is the same as the copper foil, both of which are wound in a spiral manner. The copper foil cannot overlap, and the protective film can overlap by 20%-40%. The rotation direction of the protective film needs to be opposite to that of the copper foil. In the final cutting process, the flatness of the cut surface is ensured by rotary cutting, and the flatness of the cut surface is guaranteed to be within 0.03mm. The cutting is guaranteed to be flat, preventing the raw materials from being exposed and puncturing the rubber, thereby avoiding a short circuit inside the charging cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG1 is a perspective schematic diagram of a nickel-titanium alloy wound metal wire according to the present invention;

[0022] FIG2 is a schematic diagram of the disassembly of the nickel-titanium alloy wound metal wire of the present invention;

[0023] FIG3 is a block diagram of the process system of the present invention;

[0024] FIG4 is a block diagram of the finished product detection and judgment of the present invention.

[0025] Among them, 1. Original nickel-titanium wire; 2. Protective film; 3. Copper foil. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] Example 1:

[0028] As shown in Figures 1-4, an embodiment of the present invention provides a nickel-titanium alloy winding wire, including an original nickel-titanium wire 1, a protective film 2 is fixedly connected to the outer wall of the original nickel-titanium wire 1, and a copper foil 3 is fixedly connected to the outer wall of the protective film 2.

[0029] Specifically, a process for winding a nickel-titanium alloy wire includes the following raw materials: hot-melt Pu glue, original nickel-titanium wire 1, copper foil 3 and protective film 2.

[0030] Specifically, the method includes the following steps:

[0031] S1. Prepare the required materials, hot melt Pu glue, original nickel titanium wire, copper foil, protective film and coating tools. According to the design requirements, cut the copper foil into small pieces of the required size or shape, and ensure the surface is smooth. Heat it in a heat treatment furnace to combine the hot melt Pu glue and the original nickel titanium wire;

[0032] After S2 and S1, use coating tools such as scrapers, coating machines, etc. to evenly coat the protective film on the surface of the copper foil, ensuring that the protective film completely covers the copper foil and there are no obvious bubbles or defects;

[0033] After S3 and S2 are completed, the copper foil coated with the protective film is placed in a drying device to dry the protective film. Next, the original nickel-titanium wire is trimmed and pre-treated. An automatic winding machine or manual operation is used. The copper foil is then wound on the protective film in a spiral manner through the friction between the copper foil and the silica gel. The copper foil is then heated in a heat treatment furnace to bond the hot melt Pu adhesive to the copper foil.

[0034] After S4 and S3, clean the outer wall of the original nickel-titanium wire and wind the Pu protective film in the same way as the copper foil in a spiral. The copper foil cannot overlap, but the protective film can overlap by 20%-40%. The rotation direction of the protective film needs to be opposite to that of the copper foil.

[0035] After S5 and S4, weld the two ends of the nickel-titanium wire to other electronic components, or make appropriate connections as needed to complete the circuit connection. Test the finished product to ensure the quality of the wire winding and the stability of the connection, and make corrections or optimizations as needed.

[0036] Specifically, if the quality of the nickel-titanium wire fails the finished product inspection, it will return to the copper foil winding operation step for repair. If the quality of the nickel-titanium wire passes the finished product inspection, it will proceed to the next processing and cutting operation. By rotary cutting, the flatness of the cut surface of the nickel-titanium wire is guaranteed to be within 0.03mm.

[0037] Specifically, the temperature of the heat treatment furnace in S1 is 80-200° C., and the time is 5-30 seconds. The temperature of the heat treatment furnace in S3 is 80-200° C., and the time is 5-30 seconds.

[0038] Specifically, the temperature of drying the protective film in S3 is controlled at 100-150° C., and the time is controlled at 20-30 minutes.

[0039] Specifically, the cleaning liquid used for cleaning in S4 is prepared according to the following types and quantities: 30 parts of purified water, 3-5 parts of surfactant, 1-2 parts of sodium tripolyphosphate, 2-4 parts of ammonia water, 2-4 parts of acetic acid, 1-2 parts of anhydrous sodium sulfate, 1-2 parts of buffer, 0.6-1.5 parts of preservative, and 0.5-1 part of deionized water.

[0040] In S5, the welding temperature is controlled at 80-100° C., argon with a purity of ≥99% is used as the shielding gas, and the gas flow rate is controlled at 8-12 L / min. The original nickel-titanium wire prepared in the above steps is placed in an electric furnace at a temperature of 300-450° C. After the temperature of the original nickel-titanium wire reaches the furnace temperature, the original nickel-titanium wire is removed from the furnace and immediately immersed in water at a temperature of 3-6° C. for 30-50 seconds for water cooling.

[0041] Example 2:

[0042] As shown in Figures 1-4, an embodiment of the present invention provides a nickel-titanium alloy winding wire, including an original nickel-titanium wire 1, a protective film 2 is fixedly connected to the outer wall of the original nickel-titanium wire 1, and a copper foil 3 is fixedly connected to the outer wall of the protective film 2.

[0043] Specifically, a process for winding a nickel-titanium alloy wire includes the following raw materials: hot-melt Pu glue, original nickel-titanium wire 1, copper foil 3 and protective film 2.

[0044] Specifically, the method includes the following steps:

[0045] S1. Prepare the required materials, hot melt Pu glue, original nickel titanium wire, copper foil, protective film and coating tools. According to the design requirements, cut the copper foil into small pieces of the required size or shape, and ensure the surface is smooth. Heat it in a heat treatment furnace to combine the hot melt Pu glue and the original nickel titanium wire;

[0046] After S2 and S1, use coating tools such as scrapers, coating machines, etc. to evenly coat the protective film on the surface of the copper foil, ensuring that the protective film completely covers the copper foil and there are no obvious bubbles or defects;

[0047] After S3 and S2 are completed, the copper foil coated with the protective film is placed in a drying device to dry the protective film. Next, the original nickel-titanium wire is trimmed and pre-treated. An automatic winding machine or manual operation is used. The copper foil is then wound on the protective film in a spiral manner through the friction between the copper foil and the silica gel. The copper foil is then heated in a heat treatment furnace to bond the hot melt Pu adhesive to the copper foil.

[0048] After S4 and S3, clean the outer wall of the original nickel-titanium wire and wind the Pu protective film in the same way as the copper foil in a spiral. The copper foil cannot overlap, but the protective film can overlap by 25%-35%. The rotation direction of the protective film needs to be opposite to that of the copper foil.

[0049] After S5 and S4, weld the two ends of the nickel-titanium wire to other electronic components, or make appropriate connections as needed to complete the circuit connection. Test the finished product to ensure the quality of the wire winding and the stability of the connection, and make corrections or optimizations as needed.

[0050] Specifically, if the quality of the nickel-titanium wire fails the finished product inspection, it will return to the copper foil winding operation step for repair. If the quality of the nickel-titanium wire passes the finished product inspection, it will proceed to the next processing and cutting operation. By rotary cutting, the flatness of the cut surface of the nickel-titanium wire is guaranteed to be within 0.03mm.

[0051] Specifically, the temperature of the heat treatment furnace in S1 is 90-180° C. and the time is 8-40 seconds, and the temperature of the heat treatment furnace in S3 is 90-180° C. and the time is 8-40 seconds.

[0052] Specifically, the temperature of drying the protective film in S3 is controlled at 100-150° C., and the time is controlled at 20-30 minutes.

[0053] Specifically, the cleaning liquid used for cleaning in S4 is prepared according to the following types and quantities: 30 parts of purified water, 3-5 parts of surfactant, 1-2 parts of sodium tripolyphosphate, 2-4 parts of ammonia water, 2-4 parts of acetic acid, 1-2 parts of anhydrous sodium sulfate, 1-2 parts of buffer, 0.6-1.5 parts of preservative, and 0.5-1 part of deionized water.

[0054] In S5, the welding temperature is controlled at 80-100° C., argon with a purity of ≥99% is used as the shielding gas, and the gas flow rate is controlled at 8-12 L / min. The original nickel-titanium wire prepared in the above steps is placed in an electric furnace at a temperature of 300-450° C. After the temperature of the original nickel-titanium wire reaches the furnace temperature, the original nickel-titanium wire is removed from the furnace and immediately immersed in water at a temperature of 3-6° C. for 30-50 seconds for water cooling.

[0055] Example 3:

[0056] As shown in Figures 1-4, an embodiment of the present invention provides a nickel-titanium alloy winding wire, including an original nickel-titanium wire 1, a protective film 2 is fixedly connected to the outer wall of the original nickel-titanium wire 1, and a copper foil 3 is fixedly connected to the outer wall of the protective film 2.

[0057] Specifically, a process for winding a nickel-titanium alloy wire includes the following raw materials: hot-melt Pu glue, original nickel-titanium wire 1, copper foil 3 and protective film 2.

[0058] Specifically, the method includes the following steps:

[0059] S1. Prepare the required materials, hot melt Pu glue, original nickel titanium wire, copper foil, protective film and coating tools. According to the design requirements, cut the copper foil into small pieces of the required size or shape, and ensure the surface is smooth. Heat it in a heat treatment furnace to combine the hot melt Pu glue and the original nickel titanium wire;

[0060] After S2 and S1, use coating tools such as scrapers, coating machines, etc. to evenly coat the protective film on the surface of the copper foil, ensuring that the protective film completely covers the copper foil and there are no obvious bubbles or defects;

[0061] After S3 and S2 are completed, the copper foil coated with the protective film is placed in a drying device to dry the protective film. Next, the original nickel-titanium wire is trimmed and pre-treated. An automatic winding machine or manual operation is used. The copper foil is then wound on the protective film in a spiral manner through the friction between the copper foil and the silica gel. The copper foil is then heated in a heat treatment furnace to bond the hot melt Pu adhesive to the copper foil.

[0062] After S4 and S3, clean the outer wall of the original nickel-titanium wire and wind the Pu protective film in the same way as the copper foil in a spiral. The copper foil cannot overlap, but the protective film can overlap by 30%-40%. The rotation direction of the protective film needs to be opposite to that of the copper foil.

[0063] After S5 and S4, weld the two ends of the nickel-titanium wire to other electronic components, or make appropriate connections as needed to complete the circuit connection. Test the finished product to ensure the quality of the wire winding and the stability of the connection, and make corrections or optimizations as needed.

[0064] Specifically, if the quality of the nickel-titanium wire fails the finished product inspection, it will return to the copper foil winding operation step for repair. If the quality of the nickel-titanium wire passes the finished product inspection, it will proceed to the next processing and cutting operation. By rotary cutting, the flatness of the cut surface of the nickel-titanium wire is guaranteed to be within 0.03mm.

[0065] Specifically, the temperature of the heat treatment furnace in S1 is 100-220° C., and the time is 10-45 seconds. The temperature of the heat treatment furnace in S3 is 100-220° C., and the time is 10-45 seconds.

[0066] Specifically, the temperature of drying the protective film in S3 is controlled at 100-150° C., and the time is controlled at 20-30 minutes.

[0067] Specifically, the cleaning liquid used for cleaning in S4 is prepared according to the following types and quantities: 30 parts of purified water, 3-5 parts of surfactant, 1-2 parts of sodium tripolyphosphate, 2-4 parts of ammonia water, 2-4 parts of acetic acid, 1-2 parts of anhydrous sodium sulfate, 1-2 parts of buffer, 0.6-1.5 parts of preservative, and 0.5-1 part of deionized water.

[0068] In S5, the welding temperature is controlled at 80-100° C., argon with a purity of ≥99% is used as the shielding gas, and the gas flow rate is controlled at 8-12 L / min. The original nickel-titanium wire prepared in the above steps is placed in an electric furnace at a temperature of 300-450° C. After the temperature of the original nickel-titanium wire reaches the furnace temperature, the original nickel-titanium wire is removed from the furnace and immediately immersed in water at a temperature of 3-6° C. for 30-50 seconds for water cooling.

[0069] Example 4:

[0070] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A nickel-titanium alloy winding wire, comprising an original nickel-titanium wire (1), characterized in that: The outer wall of the original nickel-titanium wire (1) is fixedly connected to a protective film (2), and the outer wall of the protective film (2) is fixedly connected to a copper foil (3).

2. A process for winding a nickel-titanium alloy wire according to claim 1, characterized in that: The invention comprises the following raw materials: hot melt Pu adhesive, original nickel titanium wire (1), copper foil (3) and protective film (2).

3. A process for winding a nickel-titanium alloy wire according to claim 2, characterized in that: The following steps are involved: S1. Prepare the required materials, hot melt Pu glue, original nickel titanium wire, copper foil, protective film and coating tools. According to the design requirements, cut the copper foil into small pieces or shapes of the required size and ensure the surface is smooth. Heat it in a heat treatment furnace to combine the hot melt Pu glue with the original nickel titanium wire; After S2 and S1 are completed, use a coating tool (such as a scraper, coating machine, etc.) to evenly coat the protective film on the surface of the copper foil, ensuring that the protective film completely covers the copper foil and there are no obvious bubbles or defects; After S3 and S2 are completed, the copper foil coated with the protective film is placed in a drying device to dry the protective film. Then, the original nickel-titanium wire is trimmed and pre-treated. An automatic wire winding machine or manual operation is used. The copper foil is then wound around the protective film in a spiral manner through the friction between the copper foil and the silica gel. The copper foil is then heated in a heat treatment furnace to combine the hot melt Pu adhesive with the copper foil. After S4 and S3, the outer wall of the original nickel-titanium wire is cleaned, and the Pu protective film is wound in a spiral manner like the copper foil. The copper foil cannot overlap, and the protective film can overlap by 20%-40%. The rotation direction of the protective film needs to be opposite to that of the copper foil. After the operations of S5 and S4 are completed, the two ends of the nickel-titanium wire are welded to other electronic components, or appropriate connections are made as required to complete the circuit connection, and the finished product is inspected to ensure the quality of the wire winding and the stability of the connection, and corrections or optimizations are made as needed.

4. A process for winding a nickel-titanium alloy wire according to claim 3, characterized in that: If the quality of the nickel-titanium wire fails the finished product inspection, the copper foil winding operation step is returned for repair. If the quality of the nickel-titanium wire passes the finished product inspection, the next processing and cutting operation is performed. The flatness of the cut surface of the nickel-titanium wire is ensured by rotary cutting, and the flatness of the cut surface is guaranteed to be within 0.03mm.

5. A process for winding a nickel-titanium alloy wire according to claim 4, characterized in that: The temperature of the heat treatment furnace in S1 is 80-200° C., and the time is 5-30 seconds. The temperature of the heat treatment furnace in S3 is 80-200° C., and the time is 5-30 seconds.

6. A process for winding a nickel-titanium alloy wire according to claim 5, characterized in that: The temperature of drying the protective film in S3 is controlled at 100-150° C. and the time is controlled at 20-30 minutes.

7. A process for winding a nickel-titanium alloy wire according to claim 6, characterized in that: The cleaning solution used for cleaning in S4 is prepared according to the following types and quantities: 30 parts of purified water, 3-5 parts of surfactant, 1-2 parts of sodium tripolyphosphate, 2-4 parts of ammonia water, 2-4 parts of acetic acid, 1-2 parts of anhydrous sodium sulfate, 1-2 parts of buffer, 0.6-1.5 parts of preservative, and 0.5-1 part of deionized water.

8. The process for winding a nickel-titanium alloy wire according to claim 7, characterized in that: The temperature during welding in S5 is controlled at 80-100° C., argon with a purity of ≥99% is used as the protective gas, and the gas flow rate is controlled at 8-12 L / min; the original nickel-titanium wire obtained through the above steps is placed in an electric furnace with a temperature of 300-450° C., and after the temperature of the original nickel-titanium wire reaches the furnace temperature, the original nickel-titanium wire is taken out of the furnace and immediately immersed in water at a temperature of 3-6° C. for 30-50 seconds for water cooling.

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