An automatic drawing system for producing bonded aluminum wire

Abstract

The application belongs to the technical field of bonded aluminum wire production, and particularly relates to an automatic drawing system for bonded aluminum wire production, which comprises, in sequence, a pay-off device, a threading and drawing device, an intelligent wire storage device, an expanding and drawing device and a take-up device; the threading and drawing device completes preliminary size reduction and surface regularity of the aluminum wire, and an internal oil supply structure can effectively reduce drawing friction damage; the intelligent wire storage device can realize slow storage and release of the aluminum wire and automatic adjustment of tension, and ensures that the front and rear processes do not interfere with each other; the expanding and drawing device uses a circular truncated cone-shaped expanding and drawing cylinder to complete secondary precise drawing fine adjustment of the aluminum wire, and an expanding strength detection assembly arranged thereon can automatically adjust detection counterweight and rotating impact angle, and complete real-time strength detection of the aluminum wire after drawing. The application is reasonable in design, can complete product quality sampling inspection of the bonded aluminum wire without interrupting front-end production, and improves production efficiency of the bonded aluminum wire.

Description

Technical Field

[0001] This invention belongs to the field of bonding aluminum wire production technology, and specifically relates to an automated drawing system for bonding aluminum wire production. Background Technology

[0002] As a core connection material in the field of integrated circuit packaging, aluminum bonding wire is widely used for the electrical connection between semiconductor chips and external frames due to its excellent conductivity, thermal conductivity, and welding performance. The wire strength affects the reliability and stability of integrated circuit packaging. The drawing process is a key step in the production of aluminum bonding wire. Its main function is to process coarse aluminum wire blanks into fine-diameter bonding wires that meet packaging requirements through progressive drawing. The performance of the automated drawing system directly affects the production efficiency, product quality, and consistency of aluminum bonding wire.

[0003] The existing automated drawing system for bonding aluminum wire production mainly consists of a wire feeding device, a wire threading and drawing device, a wire expansion and drawing device, and a wire take-up device. Its working process is as follows: the thick wire pulled by the wire feeding device first undergoes preliminary wire threading and drawing through the wire threading and drawing device to reduce the wire diameter and regularize the surface. Then, it undergoes secondary wire expansion and drawing through the wire expansion and drawing device to further reduce and fine-tune the wire diameter to ensure that the wire diameter accuracy meets the standard. Finally, the wire take-up device orderly winds up the processed bonding aluminum wire to complete the entire drawing process.

[0004] The aforementioned automated drawing system for bonding aluminum wire production has several shortcomings. First, it lacks an intelligent wire storage device between the wire threading and drawing device and the wire expansion and drawing device, resulting in a continuous and uninterrupted drawing process. This prevents the periodic stopping of the wire expansion and drawing device, thus hindering real-time strength testing of the wire after expansion and drawing. Second, when testing the strength of the wire at different locations during the drawing process, it cannot quickly adjust the dynamic load counterweight and impact height, affecting testing efficiency.

[0005] In view of this, the inventors aim to provide an improved automated drawing system for the production of bonded aluminum wires. Summary of the Invention

[0006] The purpose of this invention is to overcome the above-mentioned problems in the prior art and provide an automated drawing system for the production of bonded aluminum wire.

[0007] To achieve the above-mentioned technical objectives and effects, the present invention is implemented through the following technical solution: This invention provides an automated drawing system for the production of bonding aluminum wire, comprising a wire feeding device, a wire threading and drawing device, an intelligent wire storage device, a wire expansion and drawing device, and a wire take-up device arranged in sequence. The thick wire drawn out by the wire feeding device is first threaded and drawn by the wire threading and drawing device, then sent to the wire expansion and drawing device for secondary expansion and drawing after passing through the intelligent wire storage device, and finally wound up by the wire take-up device. The wire expansion and drawing device includes a wire expansion and drawing frame, a wire expansion and drawing cylinder, a drawing rotation mechanism, a wire support, and a wire expansion strength detection component. The wire expansion and drawing cylinder is generally frustum-shaped. The front and rear end plates of the wire expansion and drawing cylinder have through holes with keyways. The rear end plate of the wire expansion and drawing cylinder has several oil guide holes near its outer edge. The conical surface of the wire expansion and drawing cylinder has a spiral wire expansion and drawing groove. A row of detection windows communicating with the wire expansion and drawing groove is opened through the wire expansion and drawing cylinder. The drawing rotation mechanism that can drive the wire expansion and drawing cylinder to rotate is installed in the middle of the wire expansion and drawing frame. The wire support that can provide support for the entry and exit of aluminum wire is installed near both sides of the wire expansion and drawing frame. The wire expansion strength detection component that can perform strength detection on the wire expansion at the detection windows is installed above the wire expansion and drawing cylinder on the wire expansion and drawing frame.

[0008] Furthermore, in the above-mentioned automated drawing system for bonding aluminum wire production, the lower part of the wire expansion drawing machine frame is provided with an oil storage area for immersing part of the wire expansion drawing cylinder. A debris filter is installed on the outside of the oil storage area of ​​the wire expansion drawing machine frame. The two ends of the debris filter are connected to the oil storage area through a pump suction pipe and an oil return pipe, respectively.

[0009] Furthermore, in the aforementioned automated drawing system for bonding aluminum wire production, the drawing rotation mechanism includes a drawing motor, a gearbox, a steering gear set, a rotating shaft, and convex keys. The drawing motor and gearbox are mounted on the wire expansion drawing frame. The output shaft of the drawing motor is connected to the rotating shaft via the steering gear set placed in the gearbox. The rotating shaft is provided with movable support by the wire expansion drawing frame. Two convex keys that mate with the keyways in the through-shaft holes are snapped onto the rotating shaft.

[0010] Furthermore, in the aforementioned automated drawing system for bonding aluminum wire production, the expansion strength detection component includes a linear guide pair, a lifting push rod, a straightening section tube, a suspension frame, a rotary seat, a pressure rod, a pressure head, a counterweight adjustment mechanism, and a tilt reset mechanism. The outer side of the slider of the linear guide pair is supported by a suspension frame via the lifting push rod and the straightening section tube. A rotary seat is movably supported on the suspension frame. The rotary seat is connected to a pressure head matching the specifications of the detection window via the pressure rod. A counterweight adjustment mechanism is installed on both the rotary seat and the pressure rod. A tilt reset mechanism is installed on the suspension frame for adjusting the release angle of the rotary seat and for resetting the rotary seat.

[0011] Furthermore, in the aforementioned automated drawing system for bonding aluminum wire production, the pressure bar is composed of a first straight pipe section, a bent pipe section, and a second straight pipe section connected sequentially. The included angle of the bent pipe section is 90 degrees. The first straight pipe section is connected to the rotating seat, and the second straight pipe section is connected to the pressure head.

[0012] Furthermore, in the aforementioned automated drawing system for bonding aluminum wire production, the counterweight adjustment mechanism includes a counterweight adjustment motor, a counterweight adjustment screw, and a counterweight block. The counterweight adjustment motor is embedded in the rotary seat, and the output end of the counterweight adjustment motor is connected to a counterweight adjustment screw parallel to the first straight tube section in the pressure rod. A counterweight block with restricted rotation is sleeved on the outside of the counterweight adjustment screw. The counterweight block has a screw hole that cooperates with the counterweight adjustment screw and a sliding hole that cooperates with the first straight tube section in the pressure rod.

[0013] Furthermore, in the aforementioned automated drawing system for bonding aluminum wire production, the tilt adjustment and reset mechanism includes a tilt adjustment and reset motor, a belt drive, a drive shaft, an electromagnetic clutch, and a driven shaft. The tilt adjustment and reset motor and the electromagnetic clutch are mounted on a suspension frame. The output shaft of the tilt adjustment and reset motor is connected to one end of the drive shaft via the belt drive. The other end of the drive shaft is connected to the driven shaft via the electromagnetic clutch. The rotating seat is sleeved on the outside of the driven shaft, and the relative rotation between the two is restricted.

[0014] Furthermore, in the aforementioned automated drawing system for bonding aluminum wire production, the wire drawing device includes a wire drawing base plate, a height adjustment push rod, a wire drawing bracket, a fixed die base, a moving die base, a moving die drive assembly, an oil tank, an oil guide pipe, and a traction wheel set. The wire drawing base plate is supported by the height adjustment push rod and the wire drawing bracket is mounted on it. The fixed die base is mounted on the lower part of the wire drawing bracket. The moving die base is movably supported inside the fixed die base. The moving die drive assembly for driving the moving die base to rotate is installed inside the fixed die base. The moving mold base includes a moving mold base body, with straightening rings at both ends of the moving mold base body, and an axial diameter-changing drawing groove and several radial lubricating oil grooves communicating with it inside the moving mold base body. The moving mold drive assembly includes a drive motor, a drive gear, a driven gear, and a sealing cover. The drive motor and the sealing cover are directly or indirectly fixed to the fixed mold base. The drive gear is installed on the outer end of the output shaft of the drive motor. The driven gear is sleeved and fixed on the outer side of the middle part of the moving mold base body and meshes with the drive gear. The sealing cover is sleeved on the middle part of the moving mold base body and around the drive gear and the driven gear. A dynamic sealing ring is installed between the moving mold base bodies on the sealing cover. An oil guide port is opened on the upper side of the sealing cover. The outer port of each of the axial diameter changing drawing grooves communicates with the inner cavity of the sealing cover. An oil tank is installed on the upper part of the wire pulling bracket, and the bottom end of the oil tank is connected to the oil guide port via an oil guide pipe. Both the wire pulling bracket and the fixed mold base are provided with wire pulling channels, and the wire pulling bracket is equipped with a traction wheel set at the outer perimeter of the wire pulling channel at the rear end.

[0015] Furthermore, in the aforementioned automated drawing system for bonding aluminum wire production, the intelligent wire storage device includes a wire storage base plate, a vertical plate, a horizontal plate, a conveyor wheel assembly, fixed wheels, a tension groove, a tension wheel, a carrier block, a guide vertical rod, a height adjustment screw, a screw motor, and moving wheels. The wire storage base plate is supported by two vertical plates and has a horizontal plate. The conveyor wheel assembly is installed near both ends of the horizontal plate, and a row of fixed wheels is installed in the middle of the horizontal plate. A tension groove is formed in the vertical plate, and a tension wheel is slidably installed in the tension groove. A position sensor for detecting the position of the tension wheel is installed on the vertical plate. A guide vertical rod and a height adjustment screw are installed side by side between the wire storage base plate and the horizontal plate, penetrating the carrier block. The height adjustment screw is driven to rotate by a screw motor installed on the horizontal plate. The carrier block has a guide hole that cooperates with the guide vertical rod and a screw hole that cooperates with the height adjustment screw. A row of moving wheels that are offset from the fixed wheels is installed on the outer side of the carrier block.

[0016] Furthermore, the automated drawing system for the production of bonded aluminum wire also includes a controller, which is connected to the wire feeding device, the wire threading and drawing device, the intelligent wire storage device, the wire expansion and drawing device, and the wire take-up device.

[0017] The beneficial effects of this invention are: 1. By adding an intelligent wire storage device between the wire threading and pulling device and the wire expansion and pulling device, temporary storage and stable transportation of aluminum wire can be achieved. When it is necessary to test the strength of the wire after expansion and pulling, the wire expansion and pulling device can be stopped, and the intelligent wire storage device can release the stored aluminum wire, ensuring the continuous operation of the wire feeding device and the wire threading and pulling device. This not only avoids the efficiency loss caused by the interruption of the overall process, but also realizes the real-time detection of the wire strength, ensuring the product reliability of the bonded aluminum wire.

[0018] 2. The wire strength testing component, which is equipped with the wire expansion and drawing device, integrates a counterweight adjustment mechanism and a tilt reset mechanism. It can quickly adjust the dynamic load counterweight and rotational impact height to meet the strength testing needs of aluminum wires of different specifications and at different drawing stages. There is no need to disassemble and adjust the components, which greatly shortens the test preparation time. At the same time, the test process is highly automated, reducing manual intervention and lowering test errors.

[0019] 3. The wire expansion drawing cylinder adopts a frustum-shaped structure, and the spiral wire expansion drawing groove can achieve secondary precise fine-tuning of the wire body, ensuring that the wire diameter accuracy meets the requirements of integrated circuit packaging. The wire expansion drawing machine frame is equipped with an oil reservoir for immersion lubrication and cooling of the wire expansion drawing cylinder. It is also equipped with a debris filter to filter drawing debris in the lubricating oil, preventing debris from wearing down equipment parts and extending the service life of the wire expansion drawing cylinder and related transmission components.

[0020] 4. The wire drawing device adopts a structure in which a moving die base and a fixed die base cooperate. The moving die base is equipped with an axial diameter-reducing drawing groove and a radial lubricating oil groove. With the oil tank continuously supplying oil, it can not only achieve precise reduction of diameter of thick aluminum wire step by step, but also reduce friction loss during the drawing process, avoid scratches on the wire surface, and improve the surface regularity of the wire. The sealing cover of the wire drawing device cooperates with the dynamic sealing ring to prevent lubricating oil leakage, reduce lubrication loss, and reduce equipment maintenance frequency and cost.

[0021] Of course, any product implementing this invention does not necessarily need to achieve all of the above advantages at the same time. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the wire expansion and drawing device of the present invention at one angle; Figure 3 This is a schematic diagram of the expansion wire drawing device of the present invention from another angle; Figure 4 This is a half-sectional schematic diagram of the expansion wire drawing cylinder in this invention; Figure 5 This is a schematic diagram of the pulling and rotating mechanism in this invention; Figure 6 This is a schematic diagram of the structure of the wire expansion strength detection component in this invention; Figure 7 This is a side view of the expansion wire strength detection component in this invention; Figure 8 This is a schematic diagram of the pull-out state of the wire expansion strength detection component in this invention; Figure 9 This is a schematic diagram of the detection state of the wire expansion strength detection component in this invention; Figure 10 This is a schematic diagram of the wire pulling device in this invention; Figure 11 This is a schematic diagram of the wire pulling device in this invention; Figure 12 This is a schematic diagram of the intelligent wire storage device in this invention; In the attached diagram, the components represented by each number are as follows: 1- Wire feeding device; 2- Threading and pulling device, 21- Threading and pulling base plate, 22- Height adjustment push rod, 23- Threading and pulling bracket, 24- Fixed mold base, 25- Moving mold base, 251- Moving mold base body, 252- Straightening ring, 253- Axial diameter changing pulling groove, 254- Radial lubricating oil groove, 26- Moving mold drive assembly, 261- Drive motor, 262- Drive gear, 263- Driven gear, 264- Sealing cover, 265- Oil guide port, 27- Oil tank, 28- Oil guide pipe, 29- Traction wheel set; 3-Intelligent wire storage device, 301-Wire storage base plate, 302-Vertical plate, 303-Horizontal plate, 304-Transmission wheel assembly, 305-Fixed wheel, 306-Tension chute, 307-Tension wheel, 308-Carrier block, 309-Guide vertical rod, 310-Height adjustment screw, 311-Screw motor, 312-Moving wheel; 4- Wire expansion and drawing device; 41- Wire expansion and drawing machine frame; 42- Wire expansion and drawing cylinder; 421- Through shaft hole; 422- Oil guide hole; 423- Wire expansion and drawing groove; 424- Detection window; 43- Drawing rotation mechanism; 431- Drawing motor; 432- Gear box; 433- Rotating shaft; 434- Protruding key; 44- Wire support; 45- Wire expansion strength detection component; 451- Linear guide pair; 452- Lifting... 453-Push rod, 454-Suspension bracket, 455-Rotating seat, 456-Pressure rod, 457-Pressure head, 458-Counterweight adjustment mechanism, 458a-Counterweight adjustment motor, 458b-Counterweight adjustment screw, 458c-Counterweight block, 459-Tilt reset mechanism, 459a-Tilt reset motor, 459b-Belt drive component, 459c-Electromagnetic clutch, 46-Debris filter; 5-Take-up device. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] like Figure 1 As shown, this embodiment provides an automated drawing system for bonding aluminum wire production, including a wire feeding device 1, a wire threading and drawing device 2, an intelligent wire storage device 3, a wire expansion and drawing device 4, and a wire take-up device 5 arranged in sequence. The thick wire drawn out by the wire feeding device 1 is first threaded and drawn by the wire threading and drawing device 2, then sent to the wire expansion and drawing device 4 for secondary expansion and drawing after passing through the intelligent wire storage device 3, and finally wound up by the wire take-up device 5.

[0026] like Figures 2-4, Figures 8-9 As shown, the wire expansion and drawing device 4 includes a wire expansion and drawing frame 41, a wire expansion and drawing cylinder 42, a drawing rotation mechanism 43, a wire support 44, and a wire expansion strength detection component 45. The wire expansion and drawing cylinder 42 has an overall frustum-shaped structure. The front and rear end plates of the wire expansion and drawing cylinder 42 have through holes 421 with keyways. The rear end plate of the wire expansion and drawing cylinder 42 has several oil guide holes 422 near the outer edge. The conical surface of the wire expansion and drawing cylinder 42 has a spiral wire expansion and drawing groove 423. The cylinder 42 has a row of inspection windows 424 that communicate with the expansion drawing groove 423; the middle of the expansion drawing machine frame 41 is equipped with a drawing rotation mechanism 43 that can drive the expansion drawing cylinder 42 to rotate; the expansion drawing machine frame 41 is equipped with wire support brackets 44 that can provide support for the entry and exit of aluminum wires near both sides; the expansion drawing machine frame 41 is equipped with an expansion strength detection component 45 that can perform strength detection on the expansion at the inspection window 424 above the expansion drawing cylinder 42.

[0027] In this embodiment, the lower part of the wire expansion and drawing frame 41 is provided with an oil storage area for immersing a portion of the wire expansion and drawing cylinder 42. A debris filter 46 is installed on the outside of the oil storage area of ​​the wire expansion and drawing frame 41. The two ends of the debris filter are connected to the oil storage area through a pump suction pipe and an oil return pipe, respectively. The wire expansion and drawing frame 41 provides fixed support for the entire device. The oil storage area at its lower part is used to store lubricating oil and immerses a portion of the wire expansion and drawing cylinder 42. When the wire expansion and drawing cylinder 42 rotates, its surface can absorb lubricating oil, achieving self-lubrication and cooling. At the same time, the lubricating oil can lubricate the aluminum wire during the drawing process, reducing friction loss. The debris filter 46 draws lubricating oil from the oil storage area through the pump suction pipe, filters out the drawing debris in the lubricating oil, and then sends the clean lubricating oil back to the oil storage area through the oil return pipe, realizing the recycling of lubricating oil and avoiding debris wear on the equipment.

[0028] like Figure 5 As shown, the drawing and rotating mechanism 43 includes a drawing motor 431, a gear box 432, a steering gear set, a rotating shaft 433, and a key 434. The drawing motor 431 and the gear box 432 are mounted on the wire expansion drawing frame 41. The output shaft of the drawing motor 431 is connected to the rotating shaft 433 via the steering gear set placed in the gear box 432. The rotating shaft 433 is provided with movable support by the wire expansion drawing frame 41. Two keys 434 that mate with the keyways in the through-shaft hole 421 are snapped onto the rotating shaft 433.

[0029] like Figures 6-7As shown, the expansion strength testing assembly 45 includes a linear guide pair 451, a lifting push rod 452, a straightening joint tube 453, a suspension frame 454, a rotating seat 455, a pressure rod 456, a pressure head 457, a counterweight adjustment mechanism 458, and a tilt reset mechanism 459. The outer side of the slider of the linear guide pair 451 is supported by the suspension frame 454 via the lifting push rod 452 and the straightening joint tube 453. The rotating seat 455 is movably supported on the suspension frame 454. The rotating seat 455 is connected to the pressure head 457, which matches the specifications of the testing window 424, via the pressure rod 456. The counterweight adjustment mechanism 458 is installed on both the rotating seat and the pressure rod 456. The tilt reset mechanism 459 is installed on the suspension frame 454 to adjust the release angle of the rotating seat 455 and to reset the rotating seat 455.

[0030] In this embodiment, the pressure rod 456 is formed by connecting a first straight pipe section, a bent pipe section and a second straight pipe section in sequence. The included angle of the bent pipe section is 90 degrees. The first straight pipe section is connected to the rotating seat 455 and the second straight pipe section is connected to the pressure head 457.

[0031] In this embodiment, the counterweight adjustment mechanism 458 includes a counterweight adjustment motor 458a, a counterweight adjustment screw 458b, and a counterweight block 458c. The counterweight adjustment motor 458a is embedded in the rotary seat 455. The output end of the counterweight adjustment motor 458a is connected to the counterweight adjustment screw 458b, which is parallel to the first straight pipe section in the pressure rod 456. The counterweight block 458c, which restricts rotation, is sleeved on the outside of the counterweight adjustment screw 458b. The counterweight block 458c has a screw hole that cooperates with the counterweight adjustment screw 458b and a sliding hole that cooperates with the first straight pipe section in the pressure rod 456.

[0032] In this embodiment, the tilt reset mechanism 459 includes a tilt reset motor 459a, a belt drive 459b, a drive shaft, an electromagnetic clutch 459c, and a driven shaft. The tilt reset motor 459a and the electromagnetic clutch 459c are mounted on the suspension frame 454. The output shaft of the tilt reset motor 459a is connected to one end of the drive shaft via the belt drive 459b, and the other end of the drive shaft is connected to the driven shaft via the electromagnetic clutch 459c. The rotary seat 455 is sleeved on the outside of the driven shaft, and the relative rotation between the two is restricted. An angle sensor for detecting the angle of the rotary seat 455 is installed on the suspension frame 454.

[0033] The principle of wire expansion and drawing device 4 is as follows: The wire expansion and drawing cylinder 42 has an overall frustum-shaped structure with a spiral wire expansion and drawing groove 423 on its conical surface. The groove diameter gradually decreases from the feed end to the discharge end. The aluminum wire is embedded in the wire expansion and drawing groove 423. As the wire expansion and drawing cylinder 42 rotates, the aluminum wire is guided by the spiral groove and subjected to axial traction force and radial expansion force, thereby achieving further reduction and fine adjustment of the wire diameter. The through-shaft holes 421 of the front and rear end plates are used to cooperate with the rotating shaft 433. The keyway cooperates with the convex key 434 on the rotating shaft 433 to ensure that the rotating shaft 433 drives the wire expansion and drawing cylinder 42 to rotate synchronously when it rotates. The oil guide hole 422 of the rear end plate allows the lubricating oil in the oil storage area to enter the wire expansion and drawing groove 423 to improve the lubrication effect. The detection window 424 is connected to the wire expansion and drawing groove 423, which facilitates the strength detection component 45 to perform strength detection on the drawn aluminum wire.

[0034] After the drawing motor 431 is started, the output shaft drives the steering gear set in the gear box 432 to rotate. After the steering gear set changes the transmission direction, it drives the rotating shaft 433 to rotate. The rotating shaft 433 is provided with movable support by the wire expansion drawing frame 41. The convex key 434 on its surface cooperates with the keyway in the shaft hole 421 of the wire expansion drawing cylinder 42, thereby driving the wire expansion drawing cylinder 42 to rotate at a uniform speed, providing power for the secondary drawing of aluminum wire. The steering gear set can adjust the rotation direction and speed of the rotating shaft 433 according to the requirements to adapt to the drawing requirements of aluminum wire of different specifications.

[0035] The working principle of the wire expansion strength testing component 45 is as follows: The linear guide 451 can drive the entire detection assembly to move horizontally, adapting to the detection requirements of different detection windows 424; the lifting push rod 452 can adjust the height of the suspension frame 454, so that the pressure head 457 is aligned with the aluminum wire at the detection window 424; the straightening joint tube 453 plays a straightening and supporting role, ensuring the stability of the suspension frame 454 and avoiding detection errors caused by shaking during the detection process. The suspension frame 454 provides support for the rotating seat 455, the counterweight adjustment mechanism 458, and the tilting and resetting mechanism 459; the rotating seat 455 is movably supported on the suspension frame 454 and can rotate around the driven shaft; when the rotating seat 455 rotates, it drives the pressure rod 456 to rotate synchronously with the pressure head 457, and the pressure head 457 applies an impact load to the aluminum wire at the detection window 424 to achieve strength detection.

[0036] The counterweight adjustment motor 458a of the counterweight adjustment mechanism 458 is embedded in the rotary seat 455. After starting, it drives the counterweight adjustment screw 458b to rotate. The counterweight block 458c is engaged with the counterweight adjustment screw 458b through the screw hole, and the counterweight block 458c is engaged with the first straight pipe section of the pressure rod 456 through the sliding hole, so it cannot rotate. Therefore, when the counterweight adjustment screw 458b rotates, it drives the counterweight block 458c to slide along the first straight pipe section of the pressure rod 456, changing the distance between the counterweight block 458c and the rotary seat 455, thereby adjusting the size of the dynamic load counterweight to meet the aluminum wire detection requirements at different locations.

[0037] After the tilt reset motor 459a of the tilt reset mechanism 459 starts, it drives the drive shaft to rotate through the belt drive component 459b. The drive shaft is connected to the driven shaft through the electromagnetic clutch 459c. When it is necessary to adjust the release angle of the rotary table 455, the electromagnetic clutch 459c engages, the drive shaft drives the driven shaft to rotate, and then drives the rotary table 455 to rotate to the set angle. The electromagnetic clutch 459c disengages, and the rotary table 455 rotates under the gravity of the counterweight block 458c and the pressure rod 456, driving the pressure head 457 to impact the aluminum wire. After the test is completed, the electromagnetic clutch 459c engages again, and the tilt reset motor 459a drives the rotary table 455 to rotate and reset, preparing for the next test.

[0038] like Figure 10 As shown, the wire pulling device 2 includes a wire pulling base plate 21, a height adjustment push rod 22, a wire pulling bracket 23, a fixed mold base 24, a moving mold base 25, a moving mold drive assembly 26, an oil tank 27, an oil guide pipe 28, and a traction wheel set 29. The wire pulling base plate 21 is supported by the height adjustment push rod 22 and the wire pulling bracket 23 is supported by the wire pulling bracket 23. The fixed mold base 24 is installed at the lower part of the wire pulling bracket 23. The moving mold base 25 is movably supported inside the fixed mold base 24. The moving mold drive assembly 26 for driving the moving mold base 25 to rotate is installed inside the fixed mold base 24.

[0039] like Figure 11 As shown, the moving mold base 25 includes a moving mold base body 251. The moving mold base body 251 has a straightening ring 252 at both ends. The moving mold base body 251 has an axial diameter changing drawing groove 253 and several radial lubricating oil grooves 254 communicating with it.

[0040] The moving mold drive assembly 26 includes a drive motor 261, a drive gear 262, a driven gear 263, and a sealing cover 264. The drive motor 261 and the sealing cover 264 are directly or indirectly fixed to the fixed mold base 24. The drive gear 262 is installed on the outer end of the output shaft of the drive motor 261. The driven gear 263 is sleeved and fixed on the outer side of the middle part of the moving mold base body 251 and meshes with the drive gear 262. The sealing cover 264 is sleeved on the middle part of the moving mold base body 251 and the periphery of the drive gear 262 and the driven gear 263. A dynamic sealing ring is installed between the moving mold base bodies 251 on the sealing cover 264. An oil guide port 265 is opened on the upper side of the sealing cover 264. The outer ports of each axial diameter changing drawing groove 253 are connected to the inner cavity of the sealing cover 264.

[0041] In this embodiment, an oil tank 27 is installed on the upper part of the wire pulling bracket 23, and the bottom end of the oil tank 27 is connected to the oil guide port 265 via the oil guide pipe 28; both the wire pulling bracket 23 and the fixed mold base 24 are provided with wire pulling channels, and a traction wheel set 29 is installed on the outer periphery of the wire pulling channel at the rear end of the wire pulling bracket 23.

[0042] The working principle of the thread pulling device is as follows: The fixed mold base 24 is a fixed structure that provides stable support for the moving mold base 25. The moving mold base 25 is movably supported inside the fixed mold base 24. The axial diameter changing drawing groove 253 inside it has a gradual structure, with the groove diameter gradually decreasing from the feeding end to the discharge end. When the thick aluminum wire passes through the axial diameter changing drawing groove 253, it is subjected to radial extrusion force and axial traction force under the rotation of the moving mold base 25, thus achieving the initial reduction of wire diameter. The straightening rings 252 at both ends of the moving mold base 25 can straighten the aluminum wire and prevent the wire from deviating, which would cause uneven drawing. The radial lubricating oil groove 254 is connected to the inner cavity of the sealing cover 264, which can evenly deliver lubricating oil into the axial diameter changing drawing groove 253 to reduce friction during the drawing process. After the drive motor 261 starts, it drives the drive gear 262 on the output shaft to rotate. The drive gear 262 meshes with the driven gear 263 sleeved on the outside of the moving mold base body 251, thereby driving the moving mold base 25 to rotate at a constant speed inside the fixed mold base 24. The sealing cover 264 can seal the drive gear 262, the driven gear 263 and the middle of the moving mold base 25 to prevent lubricating oil leakage. At the same time, the dynamic sealing ring further improves the sealing effect. The oil guide port 265 on the sealing cover 264 can guide the lubricating oil supplied by the oil tank 27 into the inner cavity of the sealing cover 264, and then enter the axial diameter changing drawing groove 253 through the radial lubricating oil groove 254. The oil tank 27 is used to store lubricating oil and continuously supplies lubricating oil to the oil guide port 265 of the sealing cover 264 through the oil guide pipe 28, providing lubrication for the mating parts of the moving mold base 25 and the fixed mold base 24 and the axial diameter changing drawing groove 253, reducing drawing wear, and also playing a cooling role to prevent the temperature from being too high during the drawing process, which would lead to a decrease in the performance of the production line. The traction wheel assembly 29 consists of two symmetrically arranged traction wheels. After the aluminum wire passes through the wire threading channel, it passes between the two traction wheels. The traction wheels rotate at a constant speed to provide continuous traction force for the aluminum wire, and stably transport the initially drawn aluminum wire to the intelligent wire storage device 3. At the same time, it helps to adjust the tension of the aluminum wire to ensure the stability of the drawing process.

[0043] like Figure 12As shown, the intelligent wire storage device 3 includes a wire storage base plate 301, a vertical plate 302, a horizontal plate 303, a conveyor wheel assembly 304, fixed wheels 305, a tension chute 306, a tension wheel 307, a carrier block 308, a guide rod 309, a height adjustment screw 310, a screw motor 311, and a moving wheel 312. The wire storage base plate 301 is supported by two vertical plates 302 and has a horizontal plate 303. The conveyor wheel assembly 304 is installed near both ends of the horizontal plate 303, and a row of fixed wheels 305 is installed in the middle of the horizontal plate 303. A tension chute 306 is formed in the vertical plate 302. A tension wheel 307 is slidably mounted in the middle, and a position sensor for detecting the position of the tension wheel 307 is mounted on the vertical plate 302; a guide rod 309 and a height adjustment screw 310 are mounted side by side between the wire storage base plate 301 and the horizontal plate 303, which pass through the carrier block 308. The height adjustment screw 310 is driven to rotate by a screw motor 311 mounted on the horizontal plate 303. The carrier block 308 has a guide hole that cooperates with the guide rod 309 and a screw hole that cooperates with the height adjustment screw 310. A row of moving wheels 312 that are offset from the position of the fixed wheel 305 are mounted on the outer side of the carrier block 308.

[0044] The working principle of the intelligent wire storage device 3 is as follows: The fixed wheel 305 is fixedly installed in the middle of the horizontal plate 303, and the moving wheel 312 is installed on the outside of the carrier block 308 and is offset from the fixed wheel 305. The aluminum wire is alternately wound between the fixed wheel 305 and the moving wheel 312 to form a wire storage structure. The carrier block 308 can slide up and down along the guide vertical rod 309. The guide vertical rod 309 provides guidance for the carrier block 308 and prevents the carrier block 308 from deviating. After the lead screw motor 311 is started, it drives the height adjustment lead screw 310 to rotate. Since the carrier block 308 and the height adjustment lead screw 310 are connected through the lead screw hole, when the height adjustment lead screw 310 rotates, it drives the carrier block 308 to move up and down, thereby adjusting the distance between the moving wheel 312 and the fixed wheel 305 and realizing the adjustment of the wire storage amount. Tension wheel 307 is slidably installed in tension groove 306 of vertical plate 302. Aluminum wire passes around one side of tension wheel 307. When the tension of aluminum wire changes, tension wheel 307 will slide up and down in tension groove 306. Position sensor is installed on vertical plate 302, which can detect the position of tension wheel 307 in real time and transmit the position signal to controller. The controller determines the magnitude of aluminum wire tension based on the position of tension wheel 307, and then adjusts the operation of lead screw motor 311, adjusts the height of moving wheel 312, compensates for tension fluctuations, and ensures stable aluminum wire tension.

[0045] In this embodiment, a controller is also included, which is connected to the wire feeding device 1, the wire threading and pulling device 2, the intelligent wire storage device 3, the wire expansion and pulling device 4, and the wire take-up device 5 respectively.

[0046] The overall working process of this embodiment is as follows: The coarse aluminum wire blank is installed on the wire feeding device 1. The wire feeding device 1 feeds the wire at a uniform speed, and the coarse aluminum wire enters the wire drawing device 2. The drive motor 261 drives the driving gear 262 and the driven gear 263 to rotate, driving the moving mold base 25 to rotate in the fixed mold base 24. The oil tank 27 supplies oil through the oil guide pipe 28. The coarse aluminum wire completes the initial diameter reduction through the axial diameter reduction drawing groove 253 and is transported to the intelligent wire storage device 3 by the traction wheel set 29. The aluminum wire is intertwined between the fixed wheel 305 and the moving wheel 312. The position sensor detects the position of the tension wheel 307, adjusts the lead screw motor 311 and the height adjustment lead screw 310, and drives the carrier block 308 and the moving wheel 312 to adjust the wire storage amount, maintain the aluminum wire tension stably, and prepare for subsequent testing. The aluminum wire is straightened by the conductor support 44 and embedded in the expansion drawing groove 423 of the expansion drawing cylinder 42. The drawing motor 431 drives the expansion drawing cylinder 42 to rotate through the gear box 432 and the rotating shaft 433. The lubricating oil in the oil storage area is lubricated through the oil guide hole 422. The aluminum wire completes the secondary diameter reduction and fine adjustment. The debris filter 46 realizes the circulation filtration of lubricating oil. The aluminum wire is conveyed to the take-up device 5 through the conductor support 44. The take-up device 5 rotates at a uniform speed to wind up the wire.

[0047] When a strength test is required, the wire pulling device 4 stops rotating, and the intelligent wire storage device 3 stores the aluminum wire sent by the wire pulling device 2; the linear guide pair 451 and the lifting push rod 452 adjust the position of the pressure head 457, the tilting reset motor 459a and the electromagnetic clutch 459c control the rotation of the rotary seat 455, the counterweight adjustment mechanism 458 adjusts the counterweight, and the pressure head 457 impacts the aluminum wire at the detection window 424 to complete the test.

[0048] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An automated drawing system for producing bonded aluminum wire, characterized in that, The device includes a wire feeding device, a wire threading and pulling device, an intelligent wire storage device, a wire expansion and pulling device, and a wire take-up device arranged in sequence. The thick wire pulled out by the wire feeding device is first threaded and pulled by the wire threading and pulling device, then sent to the wire expansion and pulling device for secondary expansion and pulling after passing through the intelligent wire storage device, and finally wound up by the wire take-up device. The wire expansion and drawing device includes a wire expansion and drawing frame, a wire expansion and drawing cylinder, a drawing rotation mechanism, a wire support, and a wire expansion strength detection component. The wire expansion and drawing cylinder is generally frustum-shaped. The front and rear end plates of the wire expansion and drawing cylinder have through holes with keyways. The rear end plate of the wire expansion and drawing cylinder has several oil guide holes near its outer edge. The conical surface of the wire expansion and drawing cylinder has a spiral wire expansion and drawing groove. A row of detection windows communicating with the wire expansion and drawing groove is opened through the wire expansion and drawing cylinder. The middle of the wire expansion and drawing frame is equipped with a drawing rotation mechanism that can drive the wire expansion and drawing cylinder to rotate. The wire expansion and drawing frame is equipped with wire supports that can provide support for the entry and exit of aluminum wires near its sides. The wire expansion and drawing frame is equipped with a wire expansion strength detection component above the wire expansion and drawing cylinder that can perform strength detection on the wire expansion at the detection windows. The expansion strength testing assembly includes a linear guide pair, a lifting push rod, a straightening section tube, a suspension frame, a rotating seat, a pressure rod, a pressure head, a counterweight adjustment mechanism, and a tilt reset mechanism. The outer side of the slider of the linear guide pair is supported by a suspension frame via the lifting push rod and the straightening section tube. A rotating seat is movably supported on the suspension frame. The rotating seat is connected to a pressure head that matches the specifications of the testing window via the pressure rod. A counterweight adjustment mechanism is installed on both the rotating seat and the pressure rod. A tilt reset mechanism is installed on the suspension frame for adjusting the release angle of the rotating seat and for resetting the rotating seat. The pressure bar is composed of a first straight pipe section, a bent pipe section, and a second straight pipe section connected in sequence. The included angle of the bent pipe section is 90 degrees. The first straight pipe section is connected to the rotating seat, and the second straight pipe section is connected to the pressure head. The counterweight adjustment mechanism includes a counterweight adjustment motor, a counterweight adjustment screw, and a counterweight block. The counterweight adjustment motor is embedded in the rotary seat. The output end of the counterweight adjustment motor is connected to the counterweight adjustment screw, which is parallel to the first straight pipe section in the pressure rod. A counterweight block with restricted rotation is sleeved on the outside of the counterweight adjustment screw. The counterweight block has a screw hole that cooperates with the counterweight adjustment screw and a sliding hole that cooperates with the first straight pipe section in the pressure rod.

2. The automated drawing system for producing bonded aluminum wire according to claim 1, characterized in that, The lower part of the wire expansion and drawing machine frame is provided with an oil storage area for immersing part of the wire expansion and drawing cylinder. A debris filter is installed on the outside of the oil storage area of ​​the wire expansion and drawing machine frame. The two ends of the debris filter are connected to the oil storage area through a pump suction pipe and an oil return pipe, respectively.

3. The automated drawing system for producing bonded aluminum wire according to claim 2, characterized in that, The drawing and rotating mechanism includes a drawing motor, a gear box, a steering gear set, a rotating shaft, and convex keys. The drawing motor and gear box are mounted on the wire expansion drawing machine frame. The output shaft of the drawing motor is connected to the rotating shaft via the steering gear set placed in the gear box. The rotating shaft is provided with movable support by the wire expansion drawing machine frame. Two convex keys that mate with the keyways in the shaft holes are snapped onto the rotating shaft.

4. The automated drawing system for producing bonded aluminum wire according to claim 3, characterized in that, The tilt-reset mechanism includes a tilt-reset motor, a belt drive, a drive shaft, an electromagnetic clutch, and a driven shaft. The tilt-reset motor and the electromagnetic clutch are mounted on the suspension frame. The output shaft of the tilt-reset motor is connected to one end of the drive shaft via the belt drive. The other end of the drive shaft is connected to the driven shaft via the electromagnetic clutch. The rotating seat is sleeved on the outside of the driven shaft, and the relative rotation between the two is restricted.

5. The automated drawing system for producing bonded aluminum wire according to claim 4, characterized in that, The wire pulling device includes a wire pulling base plate, a height adjustment push rod, a wire pulling bracket, a fixed mold base, a moving mold base, a moving mold drive assembly, an oil tank, an oil guide pipe, and a traction wheel set. The wire pulling base plate is supported by the height adjustment push rod and the wire pulling bracket is mounted on it. The fixed mold base is installed at the lower part of the wire pulling bracket. The moving mold base is movably supported inside the fixed mold base. The moving mold drive assembly for driving the moving mold base to rotate is installed inside the fixed mold base. The moving mold base includes a moving mold base body, with straightening rings at both ends of the moving mold base body, and an axial diameter-changing drawing groove and several radial lubricating oil grooves communicating with it inside the moving mold base body. The moving mold drive assembly includes a drive motor, a drive gear, a driven gear, and a sealing cover. The drive motor and the sealing cover are directly or indirectly fixed to the fixed mold base. The drive gear is installed on the outer end of the output shaft of the drive motor. The driven gear is sleeved and fixed on the outer side of the middle part of the moving mold base body and meshes with the drive gear. The sealing cover is sleeved on the middle part of the moving mold base body and around the drive gear and the driven gear. A dynamic sealing ring is installed between the moving mold base bodies on the sealing cover. An oil guide port is opened on the upper side of the sealing cover. The outer port of each of the axial diameter changing drawing grooves communicates with the inner cavity of the sealing cover. An oil tank is installed on the upper part of the wire pulling bracket, and the bottom end of the oil tank is connected to the oil guide port via an oil guide pipe. Both the wire pulling bracket and the fixed mold base are provided with wire pulling channels, and the wire pulling bracket is equipped with a traction wheel set at the outer perimeter of the wire pulling channel at the rear end.

6. An automated drawing system for producing bonded aluminum wire according to claim 5, characterized in that, The intelligent wire storage device includes a wire storage base plate, a vertical plate, a horizontal plate, a conveyor wheel assembly, fixed wheels, a tension chute, a tension wheel, a carrier block, a guide vertical rod, a height adjustment screw, a screw motor, and moving wheels. The wire storage base plate is supported by two vertical plates and has a horizontal plate. The conveyor wheel assembly is installed near both ends of the horizontal plate, and a row of fixed wheels is installed in the middle of the horizontal plate. A tension chute is formed in the vertical plate, and a tension wheel is slidably installed in the tension chute. A position sensor for detecting the position of the tension wheel is installed on the vertical plate. A guide vertical rod and a height adjustment screw are installed side by side between the wire storage base plate and the horizontal plate, penetrating the carrier block. The height adjustment screw is driven to rotate by a screw motor installed on the horizontal plate. The carrier block has a guide hole that cooperates with the guide vertical rod and a screw hole that cooperates with the height adjustment screw. A row of moving wheels, offset from the fixed wheels, is installed on the outer side of the carrier block.

7. An automated drawing system for producing bonded aluminum wire according to claim 6, characterized in that, It also includes a controller, which is connected to the wire feeding device, the wire threading and pulling device, the intelligent wire storage device, the wire expansion and pulling device, and the wire take-up device.

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