Production process of high-strength precision embossed aluminum wire

Abstract

The invention discloses a production process of a high-strength precision embossed aluminum wire, which comprises the following steps: taking a 5019 aluminum alloy rod with the diameter phi of 10mm as a raw material, and continuously extruding until the deformation is greater than 90% and the diameter phi is 2.0 + / -0.1 mm; cold drawing is carried out for two times, the total deformation is 30 + / -2%, and cold drawing is carried out to a specific middle size; the rolling deformation is 30 + / -2%, a four-side concave-convex alternate thread structure is formed, the tensile strength sigma b of the wire is larger than or equal to 320 MPa and the yield strength sigma 0.2 of the wire is larger than or equal to 290 MPa through cold deformation strengthening, and the problem that the strength of a normal 5019 aluminum alloy is insufficient is solved. Secondary machining of the window body connecting part is omitted, the domestic related technical blank is filled, the influence rule of deformation in each stage on hardness and strength is verified through experiments, and technological parameters are scientific and controllable.

Description

Technical Field

[0001] The present invention relates to the field of metal processing, and particularly to a production process of high-strength precision corrugated aluminum wire.

Background Art

[0002] Traditional heat-insulating aluminum alloy doors and windows are composed of heat-insulating strips and aluminum alloy profiles. The heat-insulating strip is the only structural member connecting the aluminum profiles. Its strength and dimensions have a great impact on the quality of the entire heat-insulating aluminum alloy doors and windows. Once the frame part composed of the aluminum alloy window body and the heat-insulating strip is damaged, it can only be solved by replacing the entire window, which fully reflects the importance of the heat-insulating strip in heat-insulating doors and windows. In industrial production, aluminum alloy materials are processed into aluminum alloy window bodies, and fine processing is carried out on the connecting part between the window body and the heat-insulating strip to form a toothed structure, which fits with the groove in the connecting part of the heat-insulating strip. Finally, the two are joined together by machine biting to achieve a tight connection.

[0003] Through technological upgrading, aluminum alloy bar materials are processed into aluminum alloy threaded wire rods with concave and convex intervals and closely arranged on all four sides. During the processing of the heat-insulating strip, it is inlaid with the wire rods to achieve the integration of the aluminum alloy wire rods and the heat-insulating strip. This process enables the aluminum alloy window body to eliminate the need for fine processing at the connecting part, which not only reduces costs but also reduces the processing difficulty, making it easier for the aluminum alloy window body and the heat-insulating strip to fit together and reducing deformation or damage caused by direct extrusion of the two.

[0004] As a connecting piece between the aluminum alloy window body and the heat-insulating strip in heat-insulating aluminum alloy doors and windows, this wire fastener is made of anti-rust aluminum 5019 aluminum alloy in the foreign same industry. Due to the structural requirements for the combination of the heat-insulating strip fastener and the window body of the door and window, the strength and hardness indexes of the aluminum alloy wire rods need to be higher than those of the window body material (6060 or 6061 aluminum alloy). At present, this type of structure has not been adopted for the heat-insulating strips of domestic heat-insulating aluminum alloy doors and windows. Therefore, there are no such corrugated aluminum wire products in China, and the related production process is still blank.

[0005] For the commonly used window body materials 6060 or 6061 aluminum alloy in the industry, their conventional strength indexes are: tensile strength σ b ≥310 MPa, conditional yield strength σ 0.2 ≥276 MPa, hardness HB≥90 in T6 state;

[0006] While the strength of normal state 5019 aluminum alloy is usually tensile strength σ b (MPa)≥270, conditional yield strength σ 0.2 (MPa)≥120, and the hardness of the supplied state H112 is HB45 - 75. Obviously, the strength of 5019 aluminum alloy in normal state cannot meet the requirements. Due to its organizational structure characteristics, 5019 aluminum alloy cannot be strengthened by heat treatment to improve its strength. Therefore, it is necessary to control the cold working deformation amount and enhance the strength to the specified index requirements through strain hardening.

[0007] The disclosure of the above background art content is only for assisting in understanding the inventive concept and technical solution of the present invention, and it does not necessarily belong to the prior art of this patent application. Without clear evidence indicating that the above content was publicly available on the filing date of this patent application, the above background art should not be used to evaluate the novelty and inventiveness of this application.

Summary of the Invention

[0008] For the convenience of accurate understanding, the following are the accurate definitions of the technical terms that will appear in the subsequent text:

[0009] “σ b ” refers to: tensile strength;

[0010] “σ 0.2 ” refers to: conditional yield strength.

[0011] The object of the present invention is to propose a production process for high-strength precision corrugated aluminum wire to solve the technical problems existing in the above prior art.

[0012] To this end, the present invention adopts the following technical solutions:

[0013] A production process for high-strength precision corrugated aluminum wire, comprising the following steps:

[0014] S1. Using an aluminum alloy rod as the raw material;

[0015] S2. Continuous extrusion process: extruding the aluminum rod into a wire with a finer diameter through continuous extrusion;

[0016] S3. Cold drawing process: applying cold drawing processing to the extruded wire;

[0017] S4. Corrugating process: applying precision corrugating to the cold-drawn wire to obtain the corrugated aluminum wire with the final dimensions.

[0018] Further, the aluminum alloy rod in step S1 is a 5019 aluminum alloy rod with a diameter of φ10 ± 2 mm.

[0019] Further, the continuous extrusion in step S2 uses a double friction wheel continuous extruder, and the processing deformation amount is > 90%, and the aluminum alloy rod material is extruded to a diameter of φ2.0 ± 0.1 mm.

[0020] Further, the cold drawing processing in step S3 is carried out in multiple passes, and the total deformation amount is controlled to be 30 ± 2%, and the extruded aluminum wire is further cold-drawn to a specific intermediate size.

[0021] Further, the pass deformation amount distribution of the cold drawing process in step S3 is: 16 - 18% for the first pass, and 12 - 14% for the second pass.

[0022] Further, the deformation amount of the grooving process described in step S4 is 30 ± 2%, and a thread structure with alternating concave and convex surfaces on all four sides is formed by cold rolling.

[0023] Further, the strength index of the grooved aluminum wire described in step S4 reaches a tensile strength of σ b ≥ 320 MPa, and a conditional yield strength of σ 0.2 ≥ 290 MPa.

[0024] Further, the final dimensions of the grooved aluminum wire described in step S4 are a major axis of 1.90 ± 0.05 mm, a minor axis of 1.50 ± 0.05 mm, and a tooth height of 0.15 ± 0.01 mm in cross-section.

[0025] The present invention also provides a high-strength precision grooved aluminum wire for use as a connecting member between the window frame and the heat insulation strip of a heat-insulating aluminum alloy window.

[0026] The present invention also provides a heat-insulating aluminum alloy window using the grooved aluminum wire described above as an integrated connecting member between the window frame and the heat-insulating strip; the tooth shape on the surface of the grooved aluminum wire is directly fitted into the groove of the heat-insulating strip, and no secondary processing is required at the connecting part of the window frame.

[0027] The beneficial effects of the present invention compared with the prior art include:

[0028] Advantage 1: Significantly improve the strength performance of the material

[0029] In the prior art, the tensile strength of the normal 5019 aluminum alloy wire is only ≥ 270 MPa, and the conditional yield strength is ≥ 120 MPa, which cannot meet the rigid requirements of the connecting member of the heat-insulating aluminum alloy window for a tensile strength of ≥ 310 MPa and a yield strength of ≥ 276 MPa. Through the cumulative cold deformation strengthening mechanism, the present invention enables the material strength to increase step by step. The initial strength of the wire after continuous extrusion is a tensile strength of 201 MPa and a yield strength of 92 MPa; after 30% cold drawing deformation, the tensile strength is increased to 266 MPa and the yield strength is increased to 237 MPa; after applying a 30% deformation amount in the final grooving process, the tensile strength of the product reaches 328 MPa and the yield strength reaches 325.73 MPa. This strength value exceeds the standard requirements of the window frame material 6060 aluminum alloy (yield strength ≥ 276 MPa), and solves the inherent defect that 5019 aluminum alloy cannot be strengthened by heat treatment due to its organizational structure limitations.

[0030] Advantage 2: The process parameters are accurately controllable

[0031] The existing cold working process lacks a quantitative correlation model between the amount of deformation and the strength improvement, which easily leads to insufficient deformation or excessive deformation resulting in cracks. The present invention establishes a quantitative relationship between the deformation rate and the strength based on experimental data: when the cold drawing deformation rate is 16.28%, the increase in the tensile strength reaches 41.8 MPa; when the deformation rate increases to 29.98%, the increase in the tensile strength increases to 61.26 MPa. According to this law, a multi-pass deformation control strategy is adopted: the cold drawing deformation amount in the first pass is controlled at 16-18%, and the second pass is controlled at 12-14%, with a cumulative deformation amount of 30%. This method avoids surface microcrack defects caused by a single large deformation amount (such as >20%), realizes a stable increase in strength, and provides a scientific basis for the optimization of process parameters.

[0032] Advantage Three: Reducing the manufacturing cost of doors and windows

[0033] The traditional process requires precision tooth-shaped processing at the connection parts of the aluminum alloy window frames, including multiple processes such as milling and grinding, with high processing costs. The corrugated aluminum wire produced by the present invention can be directly embedded into the groove of the heat insulation strip, eliminating the fine processing steps of the window frame.

[0034] Advantage Four: Improving the service reliability of products

[0035] When the existing tooth-shaped structure of the window frame is embedded with the heat insulation strip, local stress concentration easily causes extrusion deformation or damage. The product of the present invention forms a fibrous grain structure through three-stage cold deformation, with a significantly increased dislocation density, and the dislocation pile-up effect enhances the deformation resistance of the material. The measured yield strength of 325.73 MPa is higher than the yield strength of the window frame material (276 MPa), ensuring that the connecting piece does not undergo plastic deformation during the assembly process. In addition, the tooth shape formed by precision corrugation has high dimensional consistency, improving the fit with the groove of the heat insulation strip and reducing the assembly stress caused by dimensional deviation.

[0036] Advantage Five: Filling the domestic technical gap

[0037] In the current domestic aluminum alloy door and window industry, such a structure has not been adopted for the heat insulation strips of domestic aluminum alloy doors and windows. Therefore, there are no such corrugated aluminum wire products in the country, and the processing technology in this field is still blank. The present invention successfully prepares 5019 corrugated aluminum wire with strength indexes of σ b ≥320 MPa and σ 0.2 ≥290 MPa through a multi-pass cold deformation process of "continuous extrusion → cold drawing → corrugation", filling the domestic technical gap in the production field of high-strength precision corrugated aluminum wire.

Description of the Drawings

[0038] Figure 1 It is a diagram showing the hardness change of 5019 aluminum alloy wire under different deformation amounts;

[0039] Figure 2This is the change diagram of the tensile strength of 5019 aluminum alloy wire under different deformation amounts;

[0040] Figure 3 It is the change diagram of yield strength of 5019 aluminum alloy wire under different deformation amounts;

[0041] Figure 4 This is a physical picture of the aluminum alloy wire product of Example 1. [Specific implementation method]

[0042] The present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope of the present invention and its application. As used herein, "include", "comprise", "have", "contain", etc. are all open terms, i.e., they are intended to include but not be limited to. It should be understood that the terms described in the present invention are only for describing a particular embodiment and are not intended to limit the present invention. In addition, for the numerical range in the present invention, it should be understood that each intermediate value between the upper and lower limits of the range is also specifically disclosed. The intermediate value within any stated value or stated range, and each smaller range between any other stated value or intermediate value within the range are also included in the present invention. The upper and lower limits of these smaller ranges may be independently included or excluded within the range.

[0043] 1. Continuous extrusion test

[0044] by The 5019 aluminum alloy rod with a diameter of 1.55 mm was used as the raw material, and the aluminum alloy wire with a product size of 1.55 × 2.06 mm was directly made through the continuous extrusion process. The mechanical properties test results of the continuously extruded 5019 aluminum alloy wire are shown in Table 1.

[0045] Table 1 Mechanical properties of 5019 aluminum alloy wire under continuous extrusion

[0046]

[0047] It can be seen that the strength of the wire directly processed by the continuous extrusion process is far from the required σb ≥ 320MPa. It is necessary to consider increasing the subsequent cold working deformation and further improve the strength index of the wire through deformation strengthening. This is because the continuous extrusion process is to feed the alloy rod material through two friction wheels. The friction heat will increase the material temperature. During the extrusion deformation process, the alloy structure undergoes rheology deformation at high temperature, and recrystallization also occurs. The final structure is an equiaxed crystal structure, which eliminates the strengthening effect of deformation. Therefore, continuous extrusion processing of wire cannot significantly improve the strength. It is necessary to further improve the strength of the wire by controlling the cold deformation in the subsequent processing.

[0048] 2. Pulling test

[0049] The aluminum alloy wire with a product size of 1.55×2.06 mm made by continuous extrusion test 1 was subjected to three drawing tests. The relationship between the deformation rate of the 5019 aluminum alloy wire after the drawing test and the increments of hardness value, tensile strength and yield strength is shown in Table 2.

[0050] Table 2 Relationship between deformation rate and increments of hardness value, tensile strength and yield strength

[0051]

[0052] Figure 1 It is the change of the hardness of the 5019 aluminum alloy wire under different deformation amounts. It can be observed from the figure that during the extrusion and several drawing processes, regardless of the increment of the deformation rate, the change of hardness shows an upward trend, showing an obvious work hardening effect. It can be observed from the figure that when the starting diameters are different and the wire is drawn to the next size diameter, the increments of the deformation rate tend to be the same and the hardness values are basically the same, that is, the processes passed are the same.

[0053] From Figure 1 and Table 2, it can be seen that compared with continuous extrusion, when drawing once, the deformation rate is 16.28%, and the hardness increases by 10.7 HV; the deformation rate is 17.98%, and the hardness increases by 13.2 HV. When drawing twice, the deformation rate is 29.98%, and the hardness value increases by 26.1 HV; the deformation rate is 30.09%, and the hardness value increases by 20.5 HV. In the later third drawing, the deformation rate is 38.78%, and it increases by 24.8 HV, and the increasing rate of hardness slows down significantly. It is analyzed that during the cold deformation processing of drawing, the dislocation density inside the 5019 aluminum alloy increases, and the grains are entangled with each other to form a cellular structure, and the dislocation movement is hindered. When the deformation rate increases significantly, the degree of dislocation entanglement increases, and the hardness value also increases significantly. With the increase of the deformation degree, the grains are elongated and the fibrosis is significant, and the deformation rate gradually weakens. When the deformation rate decreases in the next stage, the increasing rate of hardness slows down.

[0054] Figure 2 It is the tensile strength of the 5019 aluminum alloy wire under different deformation amounts. From Figure 2Combined with the observations in Table 2, it can be seen that during the first drawing, when the deformation rate is 16.28%, the increase in tensile strength is 41.8 MPa; when the deformation rate is 17.98%, the increase in tensile strength is 42.83 MPa, and the increase is very obvious. During the second drawing, when the deformation rate is 29.98%, the increase in tensile strength is 61.26 MPa; when the deformation rate is 30.09%, the increase in tensile strength is 59.53 MPa. During the third drawing, when the deformation rate is 38.78%, the increase in tensile strength is 68.345 MPa. It is analyzed that the change in the deformation rate affects the tensile strength of 5019 aluminum alloy wire. When the deformation rate is large, the tensile strength increases significantly. When the increase in the deformation rate decreases, the tensile strength index also decreases. This is because as the cross-sectional size of the wire decreases and the overall length increases, work hardening occurs, the grains are refined and fibrillated, and entanglement occurs, resulting in dislocation pile-up. In order to resist the material from being damaged by external forces, under the action of work hardening, the tensile strength further increases with the amount of deformation.

[0055] Figure 3 is the yield strength of 5019 aluminum alloy wire at different deformation amounts. It can be seen from the figure that during the extrusion and several drawing processes, the yield strength shows an upward trend. From Figure 3 the observations in Table 2, it can be seen that during the first drawing, when the deformation rate is 16.28%, the increase in yield strength is 126.59 MPa; when the deformation rate is 17.98%, the increase in yield strength is 104 MPa, and the increase is very significant. During the second drawing, when the deformation rate is 29.98%, the increase in yield strength is 140.39 MPa; when the deformation rate is 30.09%, the increase in yield strength is 146.32 MPa. During the third drawing, when the deformation rate is 38.78%, the increase in yield strength is 168.416 MPa. It is analyzed that due to the plastic deformation processing of cold drawing, the deformation rate continuously increases, the grains are refined and elongated, the dislocation density increases, and the dislocation width also becomes smaller accordingly. Dislocation pile-up occurs, and it becomes more and more difficult for the material to deform, that is, the deformation resistance increases, and the yield strength also increases significantly. Therefore, the yield strength is affected by the magnitude of the deformation rate. The greater the deformation rate of the material, the more significant the increase in the yield strength.

[0056] The strength indexes of continuously extruded 5019 aluminum alloy are σ b = 206 MPa, σ 0.2 = 92 MPa. According to the research results of the influence law of the deformation amount on the strength, the inventor designed the process route as follows: First, after a 30% deformation amount, draw and deform from the continuously extruded state. Then σ b increases by 60 MPa and becomes 266 MPa; σ 0.2 increases by 145 MPa and becomes 237 MPa. Then perform rolling deformation to roll the tooth shape, and the deformation amount is about 30%. The strength further increases and can reach the expected target σ b ≥ 320 MPa, σ0.2 ≥290 MPa. The specific implementation is as follows:

[0057] A production process of high-strength precision corrugated aluminum wire, comprising the following steps:

[0058] S1. Using a 5019 aluminum alloy rod with a diameter of φ10 mm as the raw material;

[0059] S2. Continuous extrusion process: The deformation amount through continuous extrusion processing is >90%, and the aluminum alloy rod is extruded to a diameter of φ2.0 ± 0.1 mm;

[0060] S3. Cold drawing process: Cold drawing processing is applied to the extruded wire; the cold drawing process is carried out in multiple passes, and the total deformation amount is controlled to be 30 ± 2%, and the extruded aluminum wire is further cold drawn to a specific intermediate size; the deformation amount distribution of each pass in the cold drawing process is: 16 - 18% for the first pass, 12 - 14% for the second pass;

[0061] S4. Corrugating process: Precision corrugating is applied to the cold-drawn wire, and the deformation amount of the corrugating process is 30 ± 2%. A thread structure with alternating concave and convex surfaces on four sides is formed through cold rolling to obtain the corrugated aluminum wire with the final size. The final size is a major axis of 1.90 ± 0.05 mm, a minor axis of 1.50 ± 0.05 mm, and a tooth height of 0.15 ± 0.01 mm for the cross section.

[0062] The technical principle of the production process of high-strength precision corrugated aluminum wire is as follows:

[0063] The process objective of the continuous extrusion process is to achieve large deformation amount and diameter reduction of the aluminum rod, and to provide a uniform blank for subsequent cold processing. A double-friction-wheel continuous extruder is used to raise the temperature of the aluminum rod to 350 - 400 °C through frictional heat generation. Rheological forming and dynamic recrystallization occur at high temperature to obtain an equiaxed crystal structure. Although the deformation amount is as high as 96%, and the rod diameter is reduced from φ10 mm to φ2.0 ± 0.1 mm, recrystallization eliminates most of the work hardening effect, resulting in the tensile strength of the extruded wire being only σ b = 201 MPa and the elongation being 18.5%. The main function at this stage is physical diameter reduction rather than strength improvement.

[0064] The technological objective of the cold drawing process is to enhance the strength of the wire through cold deformation strengthening and control the intermediate dimensions. The extruded wire is subjected to multiple passes of cold drawing with a total deformation of 30 ± 2%, and the pass distribution is 16 - 18% for the first pass and 12 - 14% for the second pass. During the cold drawing process, the wire undergoes plastic deformation at room temperature, and the grains are elongated into fibrous tissues along the tensile direction. The dislocation density increases, and the dislocation movement is hindered by the grain boundaries and fibrous tissues, resulting in the work hardening effect. Experimental data shows that after a 30% deformation by cold drawing, the tensile strength increases by 59.53 MPa, the yield strength increases by 146.32 MPa, and the hardness increases by 20.5 HV. The multi-pass deformation strategy avoids surface cracks caused by large single deformations and ensures a stable increase in strength.

[0065] The technological objective of the grooving process is to form a precise tooth-shaped structure and further strengthen the material. Cold rolling with a deformation of 30 ± 2% is applied to the cold-drawn wire, and a thread structure with alternating concave and convex surfaces on four sides is formed by rolling with the rollers. During this process, local plastic deformation on the wire surface further increases the dislocation density, forming cell structures and dislocation tangles, and the grains are refined to the sub-micron level. The measured data shows that the tensile strength of the wire after grooving reaches 328 MPa and the yield strength reaches 325.73 MPa, meeting the design requirements of σ b ≥320 MPa and σ 0.2 ≥290 MPa. The tooth-shaped structure and the insulating strip groove form a mechanical lock, the contact area increases compared with the traditional window milling tooth structure, and the stress distribution is more uniform.

[0066] Example 1

[0067] A production process for high-strength precision grooved aluminum wire, comprising the following steps:

[0068] S1. Using a 5019 aluminum alloy rod with a diameter of φ10 mm as the raw material;

[0069] S2. Continuous extrusion process: The deformation by continuous extrusion processing is >90%, and the aluminum alloy rod is extruded to φ2.08 mm;

[0070] S3. Cold drawing process: Cold drawing is applied to the extruded wire; the cold drawing is carried out in multiple passes, and the total deformation is controlled at 30%, and the extruded aluminum wire is further cold drawn to φ1.78 mm; the pass deformation distribution of the cold drawing process is: 17% for the first pass and 13% for the second pass;

[0071] S4. Grooving process: Precision grooving is applied to the cold-drawn wire, the deformation of the grooving process is 30%, and a thread structure with alternating concave and convex surfaces on four sides is formed by cold rolling to obtain the grooved aluminum wire with the final dimensions. The final dimensions are a major axis of 1.89 mm, a minor axis of 1.46 mm, and a tooth height of 0.15 mm for the cross-section. See the physical drawing of the final aluminum alloy wire product in Figure 4, the measured strength index is shown in Table 3, and it can be seen that the strength index meets the requirements.

[0072] Table 3 Extrusion Drawing to The mechanical property index of post-embossing

[0073]

[0074] In summary, through the cold deformation strengthening mechanism and multi-process collaborative control, the present invention systematically solves the problems of insufficient strength and precision forming of 5019 aluminum alloy. The process parameter design is based on the quantitative correlation of deformation amount - microstructure - properties, and the experimental data and theoretical analysis confirm each other, providing a scientific and reliable technical solution for the industrial production of high-strength precision embossed aluminum wire, with significant engineering application value and industry innovation.

[0075] Those skilled in the art will recognize that numerous variations to the above description are possible, so the embodiments are merely used to describe one or more specific embodiments. Although the present invention has been described in detail with its advantages, it should be understood that various changes, substitutions, and modifications can be made without departing from the spirit and scope of the present invention. In addition, the scope of application of the present invention is not limited to the specific embodiments of the processes, machines, manufactures, compositions of matter, methods, and steps described in the specification. From the disclosure of the present invention, those skilled in the art will easily utilize existing or later-developed processes, machines, manufactures, compositions of matter, methods, or steps that substantially perform the same functions or achieve the same results as the corresponding embodiments described herein. Therefore, the appended claims are intended to cover such processes, machines, manufactures, compositions of matter, methods, or steps.

Claims

1. A production process of high-strength precision corrugated aluminum wire, characterized in that, It includes the following steps: S1. Using an aluminum alloy rod as the raw material; S2. Continuous extrusion process: Extruding the aluminum rod into a wire with a smaller diameter through continuous extrusion; S3. Cold drawing process: Applying cold drawing to the extruded wire; S4. Grooving process: Applying precision grooving to the cold-drawn wire to obtain the grooved aluminum wire with the final dimensions.

2. The production process according to claim 1, characterized in that, The aluminum alloy rod described in step S1 is a 5019 aluminum alloy rod with a diameter of φ10±2mm.

3. The production process according to claim 1, characterized in that, The continuous extrusion described in step S2 uses a double friction wheel continuous extruder, and the processing deformation amount is >90%, and the aluminum alloy rod material is extruded to a diameter of φ2.0±0.1mm.

4. The production process according to claim 1, characterized in that, The cold drawing process described in step S3 is carried out in multiple passes, and the total deformation amount is controlled to be 30±2%, and the extruded aluminum wire is further cold-drawn to a specific intermediate size.

5. The production process according to claim 1, characterized in that, The pass deformation amount distribution of the cold drawing process described in step S3 is: 16-18% for the first pass and 12-14% for the second pass.

6. The production process according to claim 1, characterized in that, The deformation amount of the grooving process described in step S4 is 30±2%, and a thread structure with alternating concave and convex on four sides is formed through cold rolling.

7. The production process according to claim 1, characterized in that, The strength index of the corrugated aluminum wire described in step S4 reaches the tensile strength σ b ≥ 320 MPa, and the conditional yield strength σ 0.2 ≥ 290 MPa.

8. The production process according to claim 1, characterized in that, The final dimensions of the grooved aluminum wire described in step S4 are a major axis of 1.90±0.05mm, a minor axis of 1.50±0.05mm, and a tooth height of 0.15±0.01mm in cross section.

9. A high-strength precision corrugated aluminum wire produced by the production process according to any one of claims 1-8, characterized in that, A window frame and heat insulation strip connecting piece for heat insulation aluminum alloy doors and windows.

10. An insulated aluminum alloy door and window using the high-strength precision corrugated aluminum wire described in claim 9 as an integrated connecting member between the window frame and the heat insulation strip, characterized in that, The tooth shape on the surface of the grooved aluminum wire is directly fitted with the groove of the heat insulation strip, and no secondary processing is required for the window frame connection part.

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