Metal single crystal wire as well as processing method and application thereof

Abstract

The invention relates to the technical field of single-crystal wire processing, and discloses a metal single-crystal wire and a processing method and application thereof.The processing method of the metal single-crystal wire mainly comprises the steps that a metal single-crystal ingot is cut into metal single-crystal blocks, and the metal single-crystal blocks are continuously cut into metal single-crystal plates; and finally cutting into metal single crystal wires through spiral routing. Comprising the metal single crystal wire prepared by the above steps; the method further comprises the step of applying the metal single crystal wire to motor winding, so that the motor is arranged in a densest manner. According to the technology, the metal single crystal is processed in a cutting manner, so that the influence on crystal lattices in the material in the processing process is effectively avoided, and the processed lead still keeps the excellent characteristics of the single crystal; the crystal lattice is prevented from being damaged, the heat conductivity and the conductivity are improved, and the performance of the motor is effectively improved through the densest arrangement on the motor.

Description

Technical Field

[0001] The present invention relates to the technical field of single crystal wire processing, and particularly to a metal single crystal wire, its processing method and application. Background Art

[0002] A metal single crystal wire refers to a metal wire composed of a single crystal, which has excellent physical, chemical and mechanical properties and has important applications in the fields of electronics, aerospace, precision instruments, etc.

[0003] Existing metal wires are generally completed by drawing. This method will damage the internal lattice structure of the single crystal, causing lattice distortion, thereby affecting the performance of the wire. When drawing a metal single crystal, the metal single crystal is subjected to external forces such as axial tension and friction of the die. Under the influence of these forces, the interatomic distance inside the single crystal will change and the atoms will displace. When the external force exceeds the elastic limit of the lattice, the lattice will undergo plastic deformation; at the same time, as the drawing deformation increases, the single crystal will undergo work hardening. This is because the lattice defects increase and the dislocation density increases during the drawing process. The interaction and accumulation of dislocations will exacerbate the lattice distortion, further破坏 the regularity of the lattice, and gradually transform the lattice structure of the single crystal into a polycrystalline structure, resulting in a decline in properties such as toughness and conductivity.

[0004] In the processing of motors, metal wires are used in motors. Since the existing motors use circular windings, it is difficult to achieve the densest arrangement. Therefore, problems such as their electromagnetic performance, magnetic field strength, magnetic field distribution, loss, power rating, heat dissipation area, heat dissipation path, etc. are difficult to solve.

[0005] Therefore, those skilled in the art urgently need to develop a metal single crystal wire, its processing method and application. Summary of the Invention

[0006] The purpose of the present invention is to solve the disadvantages existing in the prior art, and a metal single crystal wire, its processing method and application are proposed.

[0007] Based on one purpose of the present invention, the following technical solution is proposed: A processing method of a metal single crystal wire, comprising the following steps: S1. Prepare a metal single crystal ingot to be processed, cut the metal single crystal ingot to obtain a metal single crystal bulk material; S2. Cut the metal single crystal bulk material to obtain a metal single crystal plate; S3. Cut the metal single crystal plate into metal single crystal wires by a spiral routing method, and the trajectory of the spiral routing forms a multi-layer nested structure in the shape of a square formed by right-angle turns; S4. Flatten the bent parts of the metal single crystal wires by extrusion to make their surfaces smooth.

[0008] Preferably, in steps S1, S2 and S3, the cutting process adopts electric spark wire cutting or diamond wire cutting.

[0009] Preferably, in step S1, the metal single crystal ingot is a cylindrical structure.

[0010] Preferably, in step S3, when the cutting process passes through a right angle of the plate, the use area of the metal single crystal plate is maximized by routing the wires in an arc shape.

[0011] Based on one purpose of the present invention, a metal single crystal wire is proposed. The metal single crystal wire is produced by the above-mentioned processing method, and the cross-section of the metal single crystal wire is a square structure.

[0012] Based on another purpose of the present invention, an application of a metal single crystal wire is proposed. The application is achieved by using the above-mentioned metal single crystal wire. The metal single crystal wire is used for motor winding to achieve the densest arrangement of the motor.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. Processing metal single crystals by cutting effectively avoids the impact on the internal lattice of the material during the processing, so that the processed wires still maintain the excellent properties of the single crystal, and their performance will be improved to varying degrees.

[0014] Second, the cutting process prevents lattice damage, increases thermal conductivity by 8-12%, and improves device heat dissipation. Lattice distortion is avoided, and the fatigue life of the copper wire is increased by 2-5 times. At the same time, the problem of increased microhardness caused by drawing is avoided.

[0015] 3. The cut single crystal wire is a square wire, which is easy to form the densest arrangement in the motor winding. The length of the metal single crystal wire wound on the rotor of the same diameter can be increased by 10%, and the electrical conductivity is improved by more than 5%, effectively improving the motor performance through the densest arrangement. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the processing of metal single crystal wire; Figure 2 This is the motor layout diagram of the circular metal single crystal wire; Figure 3 This is the motor layout diagram of square metal single crystal wire. DETAILED DESCRIPTION

[0017] The present invention will be further described below with reference to specific embodiments. The illustrative embodiments and descriptions of the present invention are intended to explain the present invention but are not intended to limit the present invention.

[0018] Example 1: 1. Specific steps: (Please refer to Figure 1 ) S1. A single crystal copper cylinder with a length of 1500 mm and a diameter of 100 mm is cut by wire electrospark cutting to obtain a copper single crystal block material with a size of 80*80*1500 mm; S2. Continue to use wire EDM to cut the copper single crystal block material into copper single crystal plates of 0.5*80*1500mm; S3, cutting the copper single crystal plate into copper single crystal wires with a cross-section of 0.5 mm*0.5 mm by using a diamond single wire cutting method in a circular routing manner; S4. Finally, the single crystal wire is squeezed through a roller flattening machine to press it into a smooth wire.

[0019] 2. The test results are as follows: 1. The electrical conductivity of the copper single crystal wire (0.5mm*0.5mm) obtained by cutting is 5% higher than that of the copper single crystal wire (diameter 1mm) obtained by drawing; 2. Due to the damage of the lattice during pulling, the lattice scattering is reduced; the thermal conductivity of the cutting process is increased by 8-12%, which increases the heat dissipation of the device.

[0020] 3. Since the lattice will not be distorted, the fatigue life of the copper wire is improved by 2-5 times.

[0021] Example 2: (See Figure 2 、 Figure 3 ) The round copper wire arrangement obtained by drawing cannot achieve the densest arrangement. The square copper wire arrangement obtained by cutting can achieve the densest arrangement.

[0022] Processing metal single crystals through cutting effectively avoids the impact of the material's internal lattice during processing, increasing thermal conductivity by 8-12% and improving device heat dissipation. Lattice distortion is avoided, and the fatigue life of copper wire is increased by 2-5 times. At the same time, the problem of increased microhardness caused by drawing is avoided.

[0023] The length of the metal single crystal wire wound on a rotor of the same diameter can be increased by 10%, and the electrical conductivity can be improved by more than 5%, effectively improving the motor performance through the densest arrangement.

[0024] The technical solution of the present invention is not limited to the above-mentioned specific embodiments. Any technical variations made according to the technical solution of the present invention fall within the protection scope of the present invention.

Claims

1. A method for processing a metal single crystal wire, characterized in that: It includes the following steps: S1. Prepare a metal single crystal ingot to be processed, cut the metal single crystal ingot to obtain a metal single crystal bulk material; S2. Cut the metal single crystal bulk material to obtain a metal single crystal sheet; S3. Cut the metal single crystal sheet into metal single crystal wires in a spiral walking manner, and the trajectory of the spiral walking turns at a right angle to form a nested structure of multiple layers in the shape of a square frame; S4. Flatten the bent part of the metal single crystal wire by extrusion to make its surface smooth.

2. The method for processing a metal single crystal wire according to claim 1, wherein: In steps S1, S2 and S3, the cutting process adopts wire electrical discharge machining or abrasive wire cutting.

3. The method for processing a metal single crystal wire according to claim 1, wherein: In step S1, the metal single crystal ingot is in a cylindrical structure.

4. The method for processing a metal single crystal wire according to claim 1, wherein: In step S3, when passing through the right angle of the sheet during the cutting process, the use area of the metal single crystal sheet is maximized by an arc-shaped walking.

5. The method for processing a metal single crystal wire according to claim 1, wherein: In step S4, a roll flattening machine is adopted in the extrusion process.

6. A metal single crystal wire, characterized in that: The metal single crystal wire is obtained by using the processing method described in any one of claims 1-5, and the cross section of the metal single crystal wire is in a square structure.

7. An application of a metal single crystal wire, characterized by: This application is realized by using the metal single crystal wire described in claim 6, and the metal single crystal wire is applied to motor winding to make the motor achieve the densest arrangement.

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