Drawing process of tensile and anti-fracture copper wire

Abstract

The invention discloses a drawing process of an anti-tensile and anti-fracture copper wire, which relates to the technical field of copper wire drawing, and comprises the following steps: step 1, drawing a copper conductor material into single wires through a wire drawing machine, paying off by taking the copper conductor material as a wire rod, and drawing into copper single wires through a wire drawing unit for drawing a round core; and 2, arranging and stranding the plurality of single copper wires obtained in the step 1 around the round core wire through a stranding machine to form a wire blank, enabling the cambered surface of each single copper wire to face the round core wire, and then pre-twisting the single copper wires. Through the process, the stranded copper wires can be passivated, so that a layer of passivation film can be formed on the surfaces of the copper wires, and the oxidation film formed on the surfaces of the copper wires can be in a relatively reasonable thickness, so that the oxidation film can enhance the tensile strength and breaking strength of the copper wires; and meanwhile, cracking caused by too thick oxidation film can be avoided, and the mechanical performance of the copper wire is improved.

Description

Technical Field

[0001] The invention relates to the technical field of copper wire drawing, and in particular to a drawing process for a tensile and fracture-resistant copper wire. Background Art

[0002] Copper wire is a filament made of copper. It has many uses, mainly in the fields of electrical, mechanical, chemical, metal processing, architectural decoration, medical, etc. The copper wire blank needs to use the copper wire blank drawing process during the processing.

[0003] Copper wire drawing is a metal processing process that compresses the cross-sectional area of ​​the copper wire through a die under the action of external force to obtain the desired cross-sectional shape and size. This process not only changes the size of the copper wire, but also reorganizes the crystal structure inside the copper wire through plastic deformation, reducing the distance between particles, thereby obtaining more uniform and fine grains.

[0004] During the wire drawing process, when the copper wire passes through the wire drawing die, the diameter of the copper wire will change greatly and the temperature will increase significantly, so that the copper wire will have a large internal stress at this time. In order to prevent the copper wire from being deformed or broken due to the large internal stress after wire drawing, the copper wire will be annealed after each wire drawing process to eliminate the internal stress of the copper wire blank. CN111872155A‌‌‌‌

[0005] The Chinese invention patent with patent announcement number CN116060465B records a copper wire drawing method for producing tinned copper stranded wire, which gradually draws the copper wire into a copper wire of the required diameter through multiple drawing processes, and then anneals the drawn copper wire to eliminate the internal stress generated in the copper wire during the drawing process, thereby improving the quality and strength of the copper wire. However, in the above-mentioned wire drawing method, the internal stress of the copper wire is eliminated only by the annealing process, and the improvement of the tensile strength and fracture resistance of the copper wire is extremely limited. Summary of the invention

[0006] The purpose of the present invention is to provide a wire drawing process for tensile and fracture-resistant copper wire, so as to solve the problem that in the existing copper wire drawing method proposed in the above background technology, only annealing is performed on the copper wire after drawing, which cannot effectively improve the tensile strength and fracture resistance of the copper wire.

[0007] To achieve the above object, the present invention provides the following technical solution: a wire drawing process for a tensile and fracture-resistant copper wire, comprising the following steps: Step 1: Use a wire drawing machine to draw the copper conductor material into a single wire, use the copper conductor material as the wire material to pay off the wire, and use a wire drawing machine with a round core to draw it into a copper single wire; Step 2: Arrange the several copper single wires obtained in step 1 around the round core wire and twist them into a conductor blank by a twisting machine, so that the arc surface of each copper single wire faces the round core wire, and then pre-twist the copper single wire, rotate the copper single wire around its own wire axis, and ensure that the small arc surface of the copper single wire faces the core wire. Finally, each copper single wire and the core wire are combined at a forming and twisting die, and twisted to form a copper conductor blank; Step 3: Place the stranded copper conductor blank into a passivation device for passivation treatment; Step 4: Place the copper conductor blank in an annealing furnace and heat it to 300-320°C for 6-12 hours, then allow it to cool naturally to room temperature to become a copper conductor semi-finished product; Step 5: Wrap the copper wire semi-finished product with a protective sheath and an insulating sheath, and then conduct quality inspection.

[0008] Preferably, the passivation device includes a passivation box, in which a guide conveying assembly and a displacement assembly are provided, wherein the guide conveying assembly is connected to the displacement assembly, and the guide conveying assembly is used to convey the copper wire blank immersed in the passivation box, and the displacement assembly is used to drive the copper wire blank to move in the passivation box through the guide conveying assembly. The advantage of such an arrangement is that the contact range between the copper wire blank immersed in the passivation box and the passivation liquid can be increased, so that the concentration of the passivation liquid on the surface of the copper wire blank is often in a high state, thereby improving the passivation effect on the surface of the copper wire blank.

[0009] Preferably, the displacement assembly includes an up-and-down swing mechanism and a forward-and-backward swing mechanism, which respectively drive the copper wire blank to swing up-and-down and forward-and-backward in the passivation box. The advantage of such an arrangement is that the copper wire blank can contact the passivation liquid in a larger range, further improving the passivation effect of the passivation device.

[0010] Preferably, the up and down swing mechanism includes two rotating shafts symmetrically connected to rotate between the front and rear inner side walls of the passivation box, two first fixing bars are symmetrically fixedly sleeved on the outer circumferential surfaces of the two rotating shafts, two pairs of second fixing bars are symmetrically fixedly connected on the adjacent sides of the two first fixing bars, two groups of fixing plates are symmetrically fixedly connected on the adjacent sides of the two pairs of the second fixing bars, the two groups of fixing plates are distributed in an inverted eight-shaped shape, each group of fixing plates is composed of two pairs of fixing plates symmetrically distributed front and back, the guide conveying assembly includes two pairs of conveying rollers symmetrically connected to rotate between the adjacent sides of each pair of two fixing plates, and the two pairs of conveying rollers are driven by a first motor in a mounting box fixedly connected to the sides of the fixing plates. The copper wire blank passes through two pairs of conveying rollers, and the up-and-down swinging mechanism also includes a driving unit connected to the front side of the passivation box, and the front ends of the two rotating shafts penetrate the front side wall of the passivation box and are connected to the driving unit, and the driving unit is used to drive the two rotating shafts to rotate clockwise or counterclockwise in opposite directions. The advantage of such an arrangement is that the two rotating shafts are driven by the driving unit to rotate clockwise or counterclockwise in opposite directions, and the two rotating shafts drive the two groups of fixed plates to swing back and forth up and down through the first fixed bar and the second fixed bar, so that the copper wire blank can be driven to swing back and forth up and down in the passivation solution through the guide conveying component, so that the concentration of the passivation solution on the surface of the copper wire blank can always be in a high state.

[0011] Preferably, the front-to-back swinging mechanism includes two pairs of hinged rods symmetrically connected to the adjacent sides of the two first fixed bars through a first rotating rod and a first torsion spring, and the ends of the two pairs of hinged rods away from the first fixed bars are respectively fixedly connected to the distant sides of the two pairs of second fixed bars, and the front-to-back swinging mechanism also includes a pushing mechanism connected to the passivation box, and the pushing mechanism is used to push the two pairs of hinged rods distributed front and back to swing back and forth in opposite directions.

[0012] Preferably, the pushing mechanism includes two fixed columns symmetrically fixedly connected to the left and right inner walls of the passivation box, and two driving blocks are symmetrically fixedly connected to the adjacent sides of the two fixed columns, and the front and rear sides of the two driving blocks are symmetrical inclined surfaces and the thickness of the driving blocks gradually increases from bottom to top. The pushing mechanism also includes two pairs of driving rods symmetrically fixedly connected to the adjacent sides of the front and rear pairs of hinged rods, and the adjacent ends of the two pairs of driving rods are respectively tightly pressed against the front and rear inclined surfaces of the two driving blocks. The advantage of such an arrangement is that when the driving unit drives the two first fixed bars to swing back and forth, the two first fixed bars can drive the two pairs of driving rods to swing up and down through the two pairs of hinged rods. In this way, under the limiting drive of the front and rear inclined surfaces of the two driving blocks, the two pairs of driving rods can move away from or approach each other, thereby driving the copper wire blank to swing back and forth in the passivation liquid, so that the copper wire blank can contact the passivation liquid in a larger range, further improving the passivation effect of the passivation device.

[0013] Preferably, the passivation box is also provided with an up and down swing rhythm adjustment component, and the up and down swing rhythm adjustment component includes two installation cavities symmetrically opened inside the two fixed columns, two pairs of second motors are symmetrically fixedly connected on the bottom walls of the two installation cavities, and two pairs of second rotating rods are symmetrically fixedly connected to the output ends of the two pairs of second motors, the top ends of the two pairs of second rotating rods respectively penetrate the top walls of the two fixed columns and are symmetrically fixedly connected to the two pairs of threaded rods, the two second rotating rods are symmetrically rotatably connected to the top walls of the two fixed columns through sealed bearings, and the bottoms of the two driving blocks are respectively threadedly sleeved between the two pairs of threaded rods. The advantage of such an arrangement is that the second rotating rod is driven to rotate by the second motor, and the second rotating rod drives the threaded rod to rotate to drive the driving block to move up and down, so that the two pairs of driving rods can move closer or farther away from each other, so that the copper wire blank can swing in the passivation liquid with more trajectories, further increasing the contact range between the passivation liquid and the copper wire blank, and greatly improving the passivation effect of the passivation device.

[0014] Preferably, each pair of two fixed plates is connected with a stirring assembly, the stirring assembly comprises two groups of sealed boxes symmetrically connected to each pair of two fixed plates, the two groups of sealed boxes are fixedly connected with a third motor, the output ends of the two groups of third motors respectively penetrate the tops of the two groups of sealed boxes and are symmetrically fixedly connected with two groups of third rotating rods, the outer circumferential surfaces of the two groups of third rotating rods are fixedly sleeved with a plurality of stirring blades equidistantly from top to bottom, the two groups of stirring assemblies are respectively located on the front and rear sides of the copper wire blank passing between the pair of fixed plates, two groups of overflow chambers are symmetrically opened on the side surfaces of each pair of two fixed plates, each group of multiple overflow chambers are equidistantly arranged along the length direction of the fixed plates, and each group of multiple overflow chambers are staggered with each group of third rotating rods, respectively. The advantage of such an arrangement is that the third motor can drive the stirring blades to stir on the front and rear sides of the copper wire blank, thereby stirring and mixing the passivation liquid near the copper wire blank, ensuring that the passivation liquid contacted by the surface of the copper wire blank always has a high concentration, thereby ensuring the passivation effect on the copper wire blank.

[0015] Preferably, an auxiliary passivation component is connected between each pair of two fixed plates, and the auxiliary passivation component can increase the stirring range of the stirring component. The advantage of such an arrangement is that it can significantly improve the stirring and mixing effect of the passivation liquid, so that the diluted passivation liquid that has been in contact with the surface of the copper wire blank and the surrounding passivation liquid can be mixed more evenly, ensuring that the passivation liquid around the surface of the copper wire blank has a stable and high concentration, thereby improving the passivation effect on the copper wire blank.

[0016] Preferably, the auxiliary passivation assembly includes two pairs of fixed blocks symmetrically fixedly connected to the adjacent sides of each pair of two fixed plates, two fourth rotating rods are symmetrically rotatably connected between the adjacent sides of the two pairs of fixed blocks, two swing plates are symmetrically fixedly sleeved on the outer circumferential surfaces of the two fourth rotating rods, two groups of sealing boxes are symmetrically fixedly connected to the bottoms of the two swing plates, the top ends of the two groups of third rotating rods respectively penetrate the two swing plates and extend to the upper sides thereof, the left and right sides of the two swing plates are respectively symmetrically fixedly connected to the adjacent sides of the two pairs of fixed blocks with two pairs of first elastic members, and two groups of paddle plates are symmetrically fixedly connected to the adjacent sides of the two swing plates, and the paddle plates are fan-shaped. The advantage of such an arrangement is that when the paddle plates swing back and forth up and down with the fixed plates, the paddle plates cannot swing up and down synchronously with the fixed plates under the resistance of the passivation liquid, thereby changing the angle between the third rotating rod and the fixed plates, so that the stirring range of the stirring blades can be reliably increased, and no additional power source is required to drive the stirring blades to swing relative to the fixed plates, thereby reducing the energy consumption of the passivation device and improving the economy and reliability of the passivation device.

[0017] In summary, the technical effects and advantages of the present invention are as follows: In the present invention, by passivating the twisted copper wire, a passivation film can be formed on the surface of the copper wire, so that the oxide film formed on the surface of the copper wire can be at a more reasonable thickness, so that the oxide film can enhance the tensile strength and fracture resistance of the copper wire, and at the same time can avoid the oxide film from being too thick and cracking, thereby improving the mechanical properties of the copper wire.

[0018] In the present invention, by setting up a guide conveying component and a displacement component, the displacement component drives the copper wire to move in the passivation box through the guide conveying component, thereby increasing the contact range between the copper wire entering the passivation box and the passivation liquid, so that the concentration of the passivation liquid on the surface of the copper wire is often in a high state, thereby improving the passivation effect on the surface of the copper wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 It is a first structural schematic diagram of a wire drawing process for a tensile and fracture-resistant copper wire according to an embodiment of the present invention; Figure 2 A second structural schematic diagram of a wire drawing process for a tensile and fracture-resistant copper wire according to an embodiment of the present invention; Figure 3It is a first cross-sectional structural schematic diagram of a wire drawing process for a tensile and fracture-resistant copper wire according to an embodiment of the present invention; Figure 4 A second cross-sectional structural schematic diagram of a wire drawing process for a tensile and fracture-resistant copper wire according to an embodiment of the present invention; Figure 5 A third cross-sectional structural schematic diagram of a wire drawing process for a tensile and fracture-resistant copper wire according to an embodiment of the present invention; Figure 6 It is a partial structural schematic diagram of a wire drawing process for a tensile and fracture-resistant copper wire in an embodiment of the present invention; Figure 7 is a front view of a fixing plate in an embodiment of the present invention; Figure 8 is a front cross-sectional view of a fixing column in an embodiment of the present invention; Fig. 9 In the embodiment of the present invention Figure 1 The enlarged schematic diagram of point A in the middle; Fig.10 In the embodiment of the present invention Figure 6 A magnified schematic diagram of point B in the middle.

[0021] In the figure: 1, passivation box; 11, liquid inlet pipe; 12, liquid discharge pipe; 2, guide conveying assembly; 21, conveying roller; 22, installation box; 3, displacement assembly; 31, up and down swing mechanism; 311, fixed plate; 312, rotating shaft; 313, first fixed bar; 314, second fixed bar; 315, driving unit; 3151, gear; 3152, cylinder; 3153, rack; 32, front and rear swing mechanism; 321, hinged rod; 3 22. Pushing mechanism; 3221. Fixed column; 3222. Driving block; 3223. Driving rod; 4. Overflow chamber; 5. Up and down swing rhythm adjustment component; 51. Installation chamber; 52. Second motor; 53. Second rotating rod; 54. Threaded rod; 6. Stirring component; 61. Sealing box; 62. Third rotating rod; 63. Stirring blade; 7. Auxiliary passivation component; 71. Fourth rotating rod; 72. Swing plate; 73. First elastic member; 74. Paddle plate. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention. Example

[0023] Please refer to Figure 1-Figure 10 The wire drawing process of a tensile and fracture-resistant copper wire shown includes the following steps: Step 1: Use a wire drawing machine to draw the copper conductor material into a single wire, use the copper conductor material as the wire material to pay off the wire, and use a wire drawing machine with a round core to draw it into a copper single wire; Step 2: Arrange the several copper single wires obtained in step 1 around the round core wire and twist them into a conductor blank by a twisting machine, so that the arc surface of each copper single wire faces the round core wire, and then pre-twist the copper single wire, rotate the copper single wire around its own wire axis, and ensure that the small arc surface of the copper single wire faces the core wire. Finally, each copper single wire and the core wire are combined at a forming and twisting die, and twisted to form a copper conductor blank; Step 3: Place the stranded copper conductor blank into a passivation device for passivation treatment; Step 4: Place the copper conductor blank in an annealing furnace and heat it to 300-320°C for 6-12 hours, then allow it to cool naturally to room temperature to become a copper conductor semi-finished product; Step 5: Wrap the copper wire semi-finished product with a protective sheath and an insulating sheath, and then conduct quality inspection.

[0024] refer to Figure 1 and Figure 3 The passivation device comprises a passivation box 1, in which a guide conveying assembly 2 and a displacement assembly 3 are arranged, wherein the guide conveying assembly 2 is connected to the displacement assembly 3, and the guide conveying assembly 2 is used to convey the copper wire blank immersed in the passivation box 1, and the displacement assembly 3 is used to drive the copper wire blank to move in the passivation box 1 through the guide conveying assembly 2; The back side of the passivation box 1 is connected with a liquid inlet pipe 11 and a liquid discharge pipe 12 for injecting the passivation liquid into the passivation box 1 or discharging the used passivation liquid from the passivation box 1 .

[0025] Specifically, the contact range between the copper wire blank entering the passivation box 1 and the passivation solution can be increased, so that the concentration of the passivation solution on the surface of the copper wire blank is always at a high state, thereby improving the passivation effect on the surface of the copper wire blank.

[0026] refer to Figure 1 , Figure 3 and Figure 4 The displacement assembly 3 includes an up-and-down swing mechanism 31 and a forward-and-backward swing mechanism 32, and the up-and-down swing mechanism 31 and the forward-and-backward swing mechanism 32 respectively drive the copper wire blank to swing up-and-down and forward-and-backward in the passivation box 1.

[0027] Specifically, the copper wire blank can be in contact with the passivation liquid in a wider range, further improving the passivation effect of the passivation device.

[0028] refer to Figure 3-Figure 6The up-and-down swing mechanism 31 includes two rotating shafts 312 symmetrically connected to the front and rear inner side walls of the passivation box 1, two first fixing bars 313 are symmetrically fixedly sleeved on the outer circumference of the two rotating shafts 312, two pairs of second fixing bars 314 are symmetrically fixedly connected on the adjacent sides of the two first fixing bars 313, and two groups of fixing plates 311 are symmetrically fixedly connected on the adjacent sides of the two pairs of second fixing bars 314. The two groups of fixing plates 311 are distributed in an inverted eight-shaped shape, and each group of fixing plates 311 is composed of two pairs of fixing plates 311 symmetrically distributed front and back. The guide conveying assembly 2 includes Two pairs of conveying rollers 21 are symmetrically connected between the adjacent sides of each pair of two fixed plates 311, and the two pairs of conveying rollers 21 are driven by a first motor in a mounting box 22 fixedly connected to the sides of the fixed plates 311. The copper wire blank passes through between the two pairs of conveying rollers 21. The up and down swinging mechanism 31 also includes a driving unit 315 connected to the front side of the passivation box 1. The front ends of the two rotating shafts 312 penetrate the front side wall of the passivation box 1 and are connected to the driving unit 315. The driving unit 315 is used to drive the two rotating shafts 312 to rotate clockwise or counterclockwise in opposite directions.

[0029] Specifically, the two rotating shafts 312 are driven by the driving unit 315 to rotate clockwise or counterclockwise in opposite directions, and the two rotating shafts 312 drive the two sets of fixed plates 311 to swing back and forth up and down through the first fixed bar 313 and the second fixed bar 314, so that the copper wire blank can be driven to swing back and forth in the passivation solution through the guide conveying component 2, so that the concentration of the passivation solution on the surface of the copper wire blank can always be at a high state; The driving unit 315 includes two gears 3151 symmetrically fixedly sleeved on the front ends of the two rotating shafts 312. The driving unit 315 also includes two cylinders 3152 symmetrically fixedly connected to the front side of the passivation box 1. Two racks 3153 are symmetrically fixedly connected to the output ends of the two cylinders 3152. The two racks 3153 are respectively meshed with the two gears 3151, so that the starting cylinder 3152 pushes the two racks 3153 to move back and forth up and down. The two racks 3153 can be respectively meshed to drive the two gears 3151 to rotate back and forth clockwise or counterclockwise in opposite directions, thereby driving the two sets of fixed plates 311 to rotate back and forth clockwise or counterclockwise in opposite directions, so that the copper wire blank immersed in the passivation solution can be driven to swing up and down and back and forth.

[0030] refer to Figure 3-Figure 5The front-to-back swinging mechanism 32 includes two pairs of hinged rods 321 symmetrically connected to the adjacent sides of the two first fixed bars 313 through a first rotating rod and a first torsion spring, and one end of the two pairs of hinged rods 321 away from the first fixed bar 313 is fixedly connected to the distant sides of the two pairs of second fixed bars 314 respectively. The front-to-back swinging mechanism 32 also includes a pushing mechanism 322 connected to the passivation box 1, and the pushing mechanism 322 is used to push the two pairs of hinged rods 321 distributed front and back to swing back and forth in opposite directions.

[0031] Reference 3- Figure 5 The pushing mechanism 322 includes two fixed columns 3221 symmetrically fixedly connected to the left and right inner walls of the passivation box 1, and two driving blocks 3222 are symmetrically fixedly connected to the adjacent sides of the two fixed columns 3221. The front and rear sides of the two driving blocks 3222 are symmetrically inclined and the thickness of the driving blocks 3222 gradually increases from bottom to top. The pushing mechanism 322 also includes two pairs of driving rods 3223 symmetrically fixedly connected to the adjacent sides of the front and rear pairs of hinged rods 321, and the adjacent ends of the two pairs of driving rods 3223 are respectively tightly pressed against the front and rear inclined surfaces of the two driving blocks 3222.

[0032] Specifically, when the driving unit 315 drives the two first fixed bars 313 to swing back and forth up and down, the two first fixed bars 313 can drive the two pairs of driving rods 3223 to swing up and down through the two pairs of hinged rods 321. In this way, under the limit drive of the front and rear inclined surfaces of the two driving blocks 3222, the two pairs of driving rods 3223 can be moved away from or close to each other, thereby driving the copper wire blank to swing back and forth in the passivation liquid, so that the copper wire blank can contact the passivation liquid in a larger range, further improving the passivation effect of the passivation device.

[0033] refer to Figure 8 The passivation box 1 is also provided with an up and down swing rhythm adjustment component 5, which includes two installation cavities 51 symmetrically opened inside the two fixed columns 3221, and two pairs of second motors 52 are symmetrically fixedly connected on the bottom walls of the two installation cavities 51, and two pairs of second rotating rods 53 are symmetrically fixedly connected to the output ends of the two pairs of second motors 52, and the top ends of the two pairs of second rotating rods 53 respectively penetrate the top walls of the two fixed columns 3221 and are symmetrically fixedly connected with two pairs of threaded rods 54, and the two second rotating rods 53 are symmetrically rotatably connected to the top walls of the two fixed columns 3221 through sealed bearings, and the bottoms of the two driving blocks 3222 are respectively threadedly sleeved between the two pairs of threaded rods 54.

[0034] Specifically, the second motor 52 drives the second rotating rod 53 to rotate, and the second rotating rod 53 drives the threaded rod 54 to rotate to drive the driving block 3222 to move up and down, so that the two pairs of driving rods 3223 can move closer to or away from each other in a rhythm, so that the copper wire blank can swing in the passivation liquid with more trajectories, further increasing the contact range between the passivation liquid and the copper wire blank, and greatly improving the passivation effect of the passivation device.

[0035] refer to Figure 5-Figure 7 A stirring assembly 6 is connected to each pair of two fixed plates 311, and the stirring assembly 6 includes two groups of sealed boxes 61 symmetrically connected to each pair of two fixed plates 311, and the two groups of sealed boxes 61 are fixedly connected with a third motor, and the output ends of the two groups of third motors respectively pass through the tops of the two groups of sealed boxes 61 and are symmetrically fixedly connected with two groups of third rotating rods 62, and the outer circumferential surfaces of the two groups of third rotating rods 62 are fixedly sleeved with multiple stirring blades 63 equidistantly from top to bottom, and the two groups of stirring assemblies 6 are respectively located on the front and rear sides of the copper wire blank passing through the pair of fixed plates 311, and two groups of overflow chambers 4 are symmetrically opened on the sides of each pair of two fixed plates 311, and each group of multiple overflow chambers 4 are arranged equidistantly along the length direction of the fixed plates 311, and each group of multiple overflow chambers 4 are staggered with each group of third rotating rods 62.

[0036] Specifically, the third motor can drive the stirring blade 63 to stir the front and rear sides of the copper wire blank, thereby stirring and mixing the passivation liquid near the copper wire blank, ensuring that the passivation liquid contacted by the surface of the copper wire blank always has a high concentration, ensuring the passivation effect on the copper wire blank.

[0037] refer to Figure 4 and Figure 6 An auxiliary passivation assembly 7 is connected between each pair of two fixing plates 311 , and the auxiliary passivation assembly 7 can increase the stirring range of the stirring assembly 6 .

[0038] Specifically, the stirring and mixing effect of the passivation liquid can be significantly improved, so that the diluted passivation liquid that has been in contact with the surface of the copper wire blank and the surrounding passivation liquid can be more evenly mixed together, ensuring that the passivation liquid around the surface of the copper wire blank has a stable and high concentration, thereby improving the passivation effect on the copper wire blank.

[0039] refer to Figure 6The auxiliary passivation assembly 7 includes two pairs of fixed blocks symmetrically fixedly connected on the adjacent sides of each pair of two fixed plates 311, two fourth rotating rods 71 ​​are symmetrically rotatably connected between the adjacent sides of the two pairs of fixed blocks, two swing plates 72 are symmetrically fixedly sleeved on the outer circumferences of the two fourth rotating rods 71, two groups of sealing boxes 61 are symmetrically fixedly connected to the bottoms of the two swing plates 72, the tops of the two groups of third rotating rods 62 respectively penetrate the two swing plates 72 and extend to the upper sides thereof, the left and right sides of the two swing plates 72 are respectively symmetrically fixedly connected to the adjacent sides of the two pairs of fixed blocks with two pairs of first elastic members 73, and the adjacent sides of the two swing plates 72 are symmetrically fixedly connected with two groups of dial plates 74, and the dial plates 74 are fan-shaped.

[0040] Specifically, when the paddle plate 74 swings back and forth up and down with the fixed plate 311, the paddle plate 74 cannot swing up and down synchronously with the fixed plate 311 due to the resistance of the passivation liquid, thereby changing the angle between the third rotating rod 62 and the fixed plate 311. In this way, the stirring range of the stirring blade 63 can be reliably increased, and no additional power source is required to drive the stirring blade 63 to swing relative to the fixed plate 311, thereby reducing the energy consumption of the passivation device and improving the economy and reliability of the passivation device.

[0041] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A wire drawing process for a tensile and fracture-resistant copper wire, characterized in that: The following steps are involved: Step 1: Use a wire drawing machine to draw the copper conductor material into a single wire, use the copper conductor material as the wire material to pay off the wire, and use a wire drawing machine with a round core to draw it into a copper single wire; Step 2: Arrange the several copper single wires obtained in step 1 around the round core wire and twist them into a conductor blank by a twisting machine, so that the arc surface of each copper single wire faces the round core wire, and then pre-twist the copper single wire, rotate the copper single wire around its own wire axis, and ensure that the small arc surface of the copper single wire faces the core wire. Finally, each copper single wire and the core wire are combined at a forming and twisting die, and twisted to form a copper conductor blank; Step 3: Place the stranded copper conductor blank into a passivation device for passivation treatment; Step 4: Place the copper conductor blank in an annealing furnace and heat it to 300-320°C for 6-12 hours, then allow it to cool naturally to room temperature to become a copper conductor semi-finished product; Step 5: Wrap the copper wire semi-finished product with a protective sheath and an insulating sheath, and then conduct quality inspection.

2. The wire drawing process of the tensile and fracture-resistant copper wire according to claim 1, characterized in that: The passivation device comprises a passivation box (1), wherein a guide conveying assembly (2) and a displacement assembly (3) are provided in the passivation box (1), wherein the guide conveying assembly (2) is connected to the displacement assembly (3), wherein the guide conveying assembly (2) is used to convey a copper wire blank immersed in the passivation box (1), and wherein the displacement assembly (3) is used to drive the copper wire blank to move in the passivation box (1) via the guide conveying assembly (2).

3. The wire drawing process of the tensile and fracture-resistant copper wire according to claim 2, characterized in that: The displacement assembly (3) comprises an up-and-down swing mechanism (31) and a forward-and-backward swing mechanism (32), and the up-and-down swing mechanism (31) and the forward-and-backward swing mechanism (32) respectively drive the copper wire blank to swing up-and-down and forward-and-backward in the passivation box (1).

4. The wire drawing process of the tensile and fracture-resistant copper wire according to claim 3, characterized in that: The up-and-down swing mechanism (31) comprises two rotating shafts (312) symmetrically connected to rotate between the front and rear inner side walls of the passivation box (1); two first fixing bars (313) are symmetrically fixedly sleeved on the outer circumferential surfaces of the two rotating shafts (312); two pairs of second fixing bars (314) are symmetrically fixedly connected on the adjacent sides of the two first fixing bars (313); two groups of fixing plates (311) are symmetrically fixedly connected on the adjacent sides of the two pairs of second fixing bars (314); the two groups of fixing plates (311) are distributed in an inverted figure eight shape; each group of fixing plates (311) is composed of two pairs of fixing plates (311) symmetrically distributed front and rear; the guide conveying assembly (2) comprises The invention comprises two pairs of conveying rollers (21) symmetrically rotatably connected between adjacent sides of each pair of two fixed plates (311); the two pairs of conveying rollers (21) are driven by a first motor in a mounting box (22) fixedly connected to the sides of the fixed plates (311); the copper wire blank passes between the two pairs of conveying rollers (21); the up-and-down swinging mechanism (31) further comprises a driving unit (315) connected to the front side of the passivation box (1); the front ends of the two rotating shafts (312) penetrate the front side wall of the passivation box (1) and are connected to the driving unit (315); the driving unit (315) is used to drive the two rotating shafts (312) to reciprocate clockwise or counterclockwise in opposite directions.

5. The wire drawing process of the tensile and fracture-resistant copper wire according to claim 4, characterized in that: The front-to-back swing mechanism (32) comprises two pairs of hinged rods (321) symmetrically connected to adjacent sides of two first fixing bars (313) by means of a first rotating rod and a first torsion spring, wherein ends of the two pairs of hinged rods (321) away from the first fixing bars (313) are respectively fixedly connected to adjacent sides of two pairs of second fixing bars (314), and the front-to-back swing mechanism (32) further comprises a pushing mechanism (322) connected to the inside of the passivation box (1), wherein the pushing mechanism (322) is used to push the two pairs of hinged rods (321) distributed front and back to swing back and forth in opposite directions.

6. The wire drawing process of the tensile and fracture-resistant copper wire according to claim 5, characterized in that: The pushing mechanism (322) comprises two fixing columns (3221) symmetrically fixedly connected to the left and right inner side walls of the passivation box (1); two driving blocks (3222) are symmetrically fixedly connected to the adjacent sides of the two fixing columns (3221); the front and rear side surfaces of the two driving blocks (3222) are both symmetrical inclined surfaces, and the thickness of the driving blocks (3222) gradually increases from bottom to top; the pushing mechanism (322) further comprises two pairs of driving rods (3223) symmetrically fixedly connected to the adjacent sides of the front and rear pairs of hinged rods (321); the adjacent ends of the two pairs of driving rods (3223) are respectively tightly pressed against the front and rear inclined surfaces of the two driving blocks (3222).

7. The wire drawing process of the tensile and fracture-resistant copper wire according to claim 6, characterized in that: The passivation box (1) is further provided with an up-and-down swing rhythm adjustment component (5), the up-and-down swing rhythm adjustment component (5) comprising two installation cavities (51) symmetrically opened inside the two fixed columns (3221), two pairs of second motors (52) being symmetrically fixedly connected to the bottom walls of the two installation cavities (51), two pairs of second rotating rods (53) being symmetrically fixedly connected to the output ends of the two pairs of second motors (52), the top ends of the two pairs of second rotating rods (53) respectively passing through the top walls of the two fixed columns (3221) and being symmetrically fixedly connected to the two pairs of threaded rods (54), the two second rotating rods (53) being symmetrically rotationally connected to the top walls of the two fixed columns (3221) via sealed bearings, and the bottoms of the two driving blocks (3222) being respectively threadedly sleeved between the two pairs of threaded rods (54).

8. The wire drawing process of the tensile and fracture-resistant copper wire according to claim 7, characterized in that: A stirring assembly (6) is connected to each pair of two fixed plates (311), and the stirring assembly (6) comprises two groups of sealed boxes (61) symmetrically connected to each pair of two fixed plates (311). A third motor is fixedly connected to each of the two groups of sealed boxes (61). The output ends of the two groups of third motors respectively penetrate the tops of the two groups of sealed boxes (61) and are symmetrically fixedly connected to two groups of third rotating rods (62). A plurality of stirring blades (63) are fixedly sleeved on the outer circumferences of the two groups of third rotating rods (62) at equal distances from top to bottom. The two groups of stirring assemblies (6) are respectively located on the front and rear sides of the copper wire blank passing between the pair of fixed plates (311). Two groups of overflow chambers (4) are symmetrically opened on the side surfaces of each pair of two fixed plates (311). The plurality of overflow chambers (4) in each group are arranged at equal distances along the length direction of the fixed plates (311). The plurality of overflow chambers (4) in each group are respectively arranged in an alternating manner with the third rotating rods (62) in each group.

9. The wire drawing process of the tensile and fracture-resistant copper wire according to claim 8, characterized in that: An auxiliary passivation component (7) is connected between each pair of two fixed plates (311), and the auxiliary passivation component (7) can increase the stirring range of the stirring component (6).

10. The wire drawing process of the tensile and fracture-resistant copper wire according to claim 9, characterized in that: The auxiliary passivation assembly (7) comprises two pairs of fixed blocks symmetrically fixedly connected to adjacent sides of each pair of two fixed plates (311); two fourth rotating rods (71) are symmetrically rotatably connected between adjacent sides of the two pairs of fixed blocks; two swing plates (72) are symmetrically fixedly sleeved on the outer circumferences of the two fourth rotating rods (71); two groups of the sealing boxes (61) are symmetrically fixedly connected to the bottoms of the two swing plates (72); the top ends of the two groups of the third rotating rods (62) respectively penetrate the two swing plates (72) and extend to the upper sides thereof; two pairs of first elastic members (73) are symmetrically fixedly connected to the left and right sides of the two swing plates (72) and the adjacent sides of the two pairs of fixed blocks; and two groups of shifting plates (74) are symmetrically fixedly connected to the adjacent sides of the two swing plates (72); the shifting plates (74) are fan-shaped.

Images