A wire toughening adjustment device for wire drawing process

Abstract

This invention provides a wire toughening adjustment device for wire drawing processes, relating to the field of wire drawing equipment technology. It includes a wire drawing section, a buffer adjustment section, and a toughening treatment section connected in sequence. The buffer adjustment section includes an active adjustment mechanism and a first guide roller, a second guide roller, and a third guide roller through which the wire passes in sequence. The first and third guide rollers are coaxially arranged, and the second guide roller is vertically slidably positioned below the first guide roller. The active adjustment mechanism is used to move the second guide roller up and down to adjust the wire tension. Wire diameter data is collected in real time by a wire diameter sensor. The buffer adjustment section stores the wire and changes the wire's travel distance to achieve active tension adjustment of the wire, thereby reducing wire diameter changes during the toughening adjustment process.

Description

Technical Field

[0001] This invention relates to the field of wire drawing equipment technology, and more specifically, to a wire toughening adjustment device for wire drawing processes. Background Technology

[0002] In the continuous drawing and toughening process of metal wire, stable control of the drawing tension is a key factor determining the drawing quality and toughening effect. For the continuous drawing and toughening process of non-ferrous metals such as copper wire, on the one hand, after the metal wire undergoes multiple drawing dies to reduce its diameter, slight deviations or uneven cross-sections are inevitable; on the other hand, the elongation of the metal wire increases significantly after toughening treatment, making it prone to intermittent and irregular diameter fluctuations under traction and stretching. These slight changes in wire diameter directly lead to unstable drawing tension, causing the metal wire to be sometimes loose and sometimes tight during the drawing process, and even exhibiting slight shaking and slippage. Tension fluctuations not only cause the metal wire diameter to exceed the tolerance range and reduce the drawing quality, but also cause frictional sparking at the electrode wheel in the toughening section, resulting in oxidation and scratches on the metal wire surface, seriously affecting the appearance quality and mechanical properties of the finished product.

[0003] In existing technologies, tension adjustment in wire drawing and toughening equipment mostly adopts a passive buffer structure with a fixed tension wheel and spring. This structure can only passively compensate for tension fluctuations and cannot actively pre-adjust based on real-time changes in the wire diameter. The adjustment response is sluggish and difficult to adapt to high-speed continuous wire drawing conditions. At the same time, the compatibility between tension adjustment and toughening process in existing devices is poor. Tension fluctuations directly cause changes in the heating length and cooling rate of the toughening wire, ultimately resulting in uneven toughening effects and poor consistency in the elongation, toughness, and other mechanical properties of the finished product. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a wire toughening adjustment device for wire drawing processes, thereby solving the problems of uneven toughening effects caused by wire diameter fluctuations in existing technologies.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] This invention provides a wire toughening adjustment device for a wire drawing process, comprising a wire drawing section, a buffer adjustment section, and a toughening treatment section connected in sequence. The buffer adjustment section includes an active adjustment mechanism and a first guide wheel, a second guide wheel, and a third guide wheel through which the wire passes in sequence. The first and third guide wheels are coaxially arranged, and the second guide wheel is vertically slidably arranged below the first guide wheel. The active adjustment mechanism is used to move the second guide wheel up and down to adjust the wire tension. The toughening treatment section has a guide wheel and two electrode wheels arranged in sequence along the wire traveling direction. At least one adjacent guide wheel is provided with a deflectable rotating arm, and a steam section is provided between the two electrode wheels. A cooling section is provided on the feeding side of the last electrode wheel. The rotating arm is used to release the wire into the steam section or the cooling section.

[0007] According to one embodiment of the present invention, the buffer adjustment section includes a first wire guide wheel and a third wire guide wheel coaxially mounted, and a second wire guide wheel is slidably disposed vertically directly below the first wire guide wheel; the active adjustment mechanism drives the second wire guide wheel to move up and down; the buffer adjustment section further includes a displacement sensor for detecting the displacement of the second wire guide wheel and a wire diameter sensor disposed at the end of the buffer adjustment section for detecting the wire diameter.

[0008] According to one embodiment of the present invention, the active adjustment mechanism includes an active adjustment seat connected to a second guide wheel and a lead screw module for driving the active adjustment seat to move vertically; the lead screw module drives the second guide wheel to generate displacement according to the detection signals of the wire diameter sensor and the displacement sensor, so as to adjust the tension of the metal wire.

[0009] According to one embodiment of the present invention, the active adjustment mechanism further includes an auxiliary adjustment component, which includes an auxiliary adjustment seat and a repulsion unit disposed between the active adjustment seat and the auxiliary adjustment seat. The repulsion unit includes a first permanent magnet, a second permanent magnet disposed opposite to each other with the same pole, and a coil for adjusting the repulsion between the two. The first permanent magnet is connected to the active adjustment seat, the second permanent magnet is connected to the auxiliary adjustment seat, and the lead screw module drives the active adjustment seat to move through the auxiliary adjustment seat.

[0010] According to one embodiment of the present invention, a repulsive gap is formed between the first permanent magnet and the second permanent magnet. After current is passed through the coil, an additional magnetic field is generated to adjust the magnitude of the repulsive force, thereby causing the second guide wheel to float slightly.

[0011] According to one embodiment of the present invention, the repulsion gap is 3mm to 8mm, and the coil is used to pass forward and reverse current to adjust the magnitude of the repulsion between the first permanent magnet and the second permanent magnet, thereby causing the second guide wheel to float slightly.

[0012] According to one embodiment of the present invention, the length of the metal wire released by the deflection of the rotating arm is less than the effective toughening length between the two electrode wheels, and the change in the wire travel distance between the fifth and sixth wire guide wheels at both ends of the rotating arm is 2 to 5 mm for every 1° deflection of the rotating arm.

[0013] According to one embodiment of the present invention, the steam section includes a plurality of steam holes arranged along the direction of travel of the metal wire to allow protective gas to be introduced into the toughening section; the cooling section is used to cool the toughened metal wire; the effective cooling length of the cooling section is greater than the effective toughening length between the two electrode wheels.

[0014] According to one embodiment of the present invention, a control unit is provided between the buffer adjustment section and the toughening treatment section; the control unit is configured to control the rotating arm to release the metal wire to compensate for the change in wire travel when the metal wire transitions between the buffer adjustment section and the toughening treatment section, and to control the active adjustment mechanism to compensate for the change in wire travel when the rotating arm resets.

[0015] According to one embodiment of the present invention, the wire diameter sensor is disposed between the buffer adjustment section and the toughening treatment section, the displacement sensor is fixed on the vertical sliding path of the second wire guide wheel, and the wire diameter sensor and the displacement sensor are respectively electrically connected to the control unit.

[0016] In summary, this application includes at least one of the following beneficial technical effects:

[0017] 1. This invention collects wire diameter data in real time using a wire diameter sensor, stores the wire diameter in a buffer adjustment section and changes the wire travel distance, thereby achieving active tension adjustment of the wire and reducing wire diameter changes during toughening adjustment.

[0018] 2. In this invention, the active adjustment mechanism of the buffer adjustment section works in concert with the rotating arm of the toughening treatment section. During the toughening process, the rotating arm rotates to shorten the wire travel and release tension, avoiding excessive plastic deformation of the plastic metal wire due to tension. During the resetting process of the rotating arm, the active adjustment mechanism drives the second wire guide wheel to move and release the metal wire stored in the buffer section, compensating for changes in the wire travel and ensuring the stability of the metal wire tension during the toughening process, further ensuring that the wire diameter change is small.

[0019] 3. The present invention is equipped with a repulsion unit, which forms a non-contact transmission structure through permanent magnets with the same poles facing each other. It can adjust the magnitude and direction of the current flowing through the coil to change the magnitude of the repulsion force of the repulsion unit, thereby driving the second wire guide wheel to achieve slight vertical floating and improving the response speed of tension adjustment. Attached Figure Description

[0020] Figure 1This is an overall structural diagram of Embodiment 1 of the present invention;

[0021] Figure 2 This is a wiring diagram of Embodiment 1 of the present invention;

[0022] Figure 3 This is a structural diagram from another perspective of Embodiment 1 of the present invention;

[0023] Figure 4 For the present invention Figure 3 Local structural diagram;

[0024] Figure 5 This is a structural diagram of the buffer adjustment section in Embodiment 1 of the present invention;

[0025] Figure 6 This is a structural diagram of the buffer adjustment section from another perspective in Embodiment 1 of the present invention;

[0026] Figure 7 This is a partial cross-sectional view of the buffer adjustment section in Embodiment 1 of the present invention;

[0027] Figure 8 This is a partial structural diagram of the buffer adjustment section in Embodiment 2 of the present invention;

[0028] Figure 9 This is a partial cross-sectional view of the buffer adjustment section in Embodiment 2 of the present invention;

[0029] Figure 10 For the present invention Figure 9 Enlarged structural diagram at point A in the middle;

[0030] Figure 11 This is a schematic diagram of the normal routing path in Embodiment 1 of the present invention;

[0031] Figure 12 This is a diagram showing the state of the rotating arm during the wiring process in Embodiment 1 of the present invention;

[0032] Figure 13 This is a state diagram of the rotating arm reset process in Embodiment 1 of the present invention.

[0033] Figure label:

[0034] 1. Drawing section; 101. Wire exit;

[0035] 2. Buffer adjustment section; 21. First partition plate; 22. Slide; 23. Guide seat; 24. Active adjustment seat; 25. Guide bracket; 26. Rotary motor; 261. Lead screw; 27. Auxiliary adjustment seat; 28. Repulsion unit; 281. First housing; 2811. First permanent magnet; 282. Second housing; 2821. Second permanent magnet; 2822. Coil;

[0036] 201. First guide roller; 202. Second guide roller; 203. Third guide roller;

[0037] 3. Toughening treatment section; 31. Second partition plate; 32. Cooling section; 33. Rotating arm; 34. Steam section; 341. Steam hole;

[0038] 301. Fourth guide wheel; 302. Fifth guide wheel; 303. Sixth guide wheel; 304. First electrode wheel; 305. Second electrode wheel;

[0039] 4. Displacement sensor; 5. Wire diameter sensor. Detailed Implementation

[0040] 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.

[0041] Example 1: This example discloses a wire toughening adjustment device for wire drawing process. (See attached document.) Figures 1 to 7 It includes a drawing section 1, a buffer adjustment section 2, and a toughening treatment section 3 arranged sequentially along the direction of the metal wire travel.

[0042] In this embodiment, the drawing section 1 is internally equipped with eight sets of drawing dies arranged sequentially along the wire travel direction. The die orifice diameter of the eight sets of drawing dies decreases progressively along the wire travel direction, with a reduction rate of 10%-20%, suitable for continuous diameter reduction processing of copper wire. (See reference...) Figure 2 After the metal wire is continuously reduced in diameter by multiple drawing dies, it is horizontally output to the buffer adjustment section 2 through the wire outlet 101 at the end of the drawing section 1. After the tension of the metal wire is adjusted by the buffer adjustment section 2, it enters the toughening treatment section 3 for toughening treatment.

[0043] See Figure 3 or Figure 4 The cavity of the buffer adjustment section 2 is fixedly provided with a vertically arranged first partition 21. The first partition 21 is provided with a wire guide wheel group, an active adjustment mechanism, a displacement sensor 4 and a wire diameter sensor 5.

[0044] See Figures 5 to 7The wire guide wheel assembly includes a first wire guide wheel 201, a second wire guide wheel 202, and a third wire guide wheel 203. The first wire guide wheel 201 and the third wire guide wheel 203 have the same diameter and are coaxially mounted on the upper part of the first partition plate 21 via a common support shaft. The axis of the support shaft is perpendicular to the horizontal direction of the wire's travel. The second wire guide wheel 202 is vertically floating directly below the first wire guide wheel 201, and the diameter of the second wire guide wheel 202 deviates from that of the first wire guide wheel 201 by no more than ±2mm. After the wire is horizontally output through the wire outlet 101, it first horizontally winds into the groove of the first wire guide wheel 201, then downwards through the groove of the second wire guide wheel 202, and then upwards through the groove of the third wire guide wheel 203 before being horizontally output to the toughening treatment section 3, forming a spiral wire path. The wire routing path forms an adjustable wire storage section within the buffer adjustment section 2. The length of the wire in the storage section changes with the center distance between the first guide roller 201 and the second guide roller 202; for every 1mm change in center distance, the length of the wire in the storage section changes by 2mm. Simultaneously, the second guide roller 202 can slide vertically, allowing the center distance between the first guide roller 201 and the second guide roller 202 to adaptively adjust with changes in wire tension, thus achieving passive tension buffering.

[0045] The active adjustment mechanism drives the second wire guide wheel 202 to reciprocate vertically, and specifically includes a guide seat 23, a slide 22, and a guide bracket 25. A guide groove extending vertically is provided on the first partition 21, directly below the first wire guide wheel 201. The vertical length of the guide groove is 150mm-300mm, adapting to the maximum adjustment stroke of the second wire guide wheel 202. The guide seat 23 is bolted to the outer wall of the guide groove facing the wire feeding side. A vertical groove parallel to the guide groove is provided inside the guide seat 23. The vertical groove has a convex cross-section, restricting the horizontal and axial movement of the slide 22. The slide 22 is slidably connected within the vertical groove. The second wire guide wheel 202 is rotatably mounted on the outer end of the slide 22 extending from the guide seat 23 via a rotating shaft. A deep groove ball bearing is provided between the rotating shaft and the slide 22.

[0046] The guide bracket 25 is bolted to the inner wall of the guide groove. The lead screw module includes a rotary motor 26 and a lead screw 261 installed at the output end of the rotary motor 26. The rotary motor 26 is fixedly installed at the bottom end of the guide bracket 25. The lead screw 261 is a ball screw, which is vertically rotatably mounted on the guide bracket 25. Both ends of the lead screw 261 are rotatably connected to the guide bracket 25 through angular contact ball bearings. The bearings are installed back-to-back to limit the axial movement of the lead screw 261. The output shaft of the rotary motor 26 is coaxially connected to the top end of the lead screw 261 through a flexible coupling. An active adjustment seat 24 is slidably arranged in the guide groove. The active adjustment seat 24 has a threaded through hole that mates with the lead screw 261. The lead screw 261 passes through the threaded through hole, forming a lead screw and nut transmission pair. The end of the active adjustment seat 24 facing the slide 22 is bolted to the inner end of the slide 22 away from the second guide wheel 202.

[0047] During operation, the rotary motor 26 drives the lead screw 261 to rotate in both directions. This, through the lead screw and nut transmission pair, causes the active adjusting seat 24 to move vertically along the lead screw 261. This, in turn, causes the second wire guide wheel 202 to float up and down along the guide groove via the slide 22, adjusting the center distance between the first and second wire guide wheels 201. This changes the wire travel distance and thus adjusts the wire tension. For every revolution of the rotary motor 26, the second wire guide wheel 202 moves vertically by 5mm, corresponding to a 10mm change in the wire travel distance.

[0048] Displacement sensor 4 is a laser displacement sensor, fixedly installed on the inner wall of the top of the guide groove. The detection end of displacement sensor 4 is positioned towards the second wire guide roller 202. Displacement sensor 4 is located on the vertical sliding path of the second wire guide roller 202, thereby enabling real-time monitoring of the vertical displacement value of the second wire guide roller 202 and transmitting the displacement data to the control unit in real time. The control unit has a preset displacement threshold range for the second wire guide roller 202. The displacement value has a linear relationship with the tension value of the metal wire. The current tension of the metal wire is fed back through the displacement value, forming tension modulation.

[0049] The wire diameter sensor 5 is a non-contact laser wire diameter sensor, which is fixedly installed on the wire path between the wire outlet 101 and the first wire guide roller 201. Its measuring optical path is perpendicular to the direction of wire travel, enabling non-contact real-time detection of the wire diameter data output from the drawing section 1, and transmitting the wire diameter data to the control unit in real time. The control unit has preset reference values ​​and change rate thresholds for the wire diameter. When the wire diameter sensor 5 detects that the change rate of the wire diameter exceeds the preset threshold, the control unit controls the active adjustment mechanism to adjust the tension of the wire.

[0050] Its working principle is as follows: When the wire diameter sensor 5 detects an increase in the wire diameter relative to the reference value, the control unit controls the rotary motor 26 to drive the lead screw 261 to rotate, causing the second wire guide wheel 202 to move downward, increasing the center distance between the first wire guide wheel 201 and the second wire guide wheel 202, thereby increasing the wire travel and increasing the wire tension. When the wire diameter sensor 5 detects a decrease in the wire diameter relative to the reference value, the control unit controls the rotary motor 26 to drive the lead screw 261 to rotate in the opposite direction, causing the second wire guide wheel 202 to move upward, decreasing the center distance between the first wire guide wheel 201 and the second wire guide wheel 202, thereby reducing the wire travel and decreasing the wire tension. The correspondence between the wire diameter change and the vertical adjustment displacement of the second wire guide wheel 202 is as follows: for every 0.01mm change in wire diameter, the vertical adjustment displacement of the second wire guide wheel 202 is 0.5mm-2mm, with the specific value preset according to the wire material, yield strength, and production speed.

[0051] Inside the cavity of the toughening treatment section 3, a vertically arranged second partition 31 is fixedly installed. On the second partition 31, a fourth wire guide wheel 301, a fifth wire guide wheel 302, a sixth wire guide wheel 303, a first electrode wheel 304, and a second electrode wheel 305 are sequentially rotatably mounted along the direction of the metal wire travel. The fourth wire guide wheel 301, the fifth wire guide wheel 302, and the sixth wire guide wheel 303 have the same diameter and are used for reversing the direction of the metal wire travel. The first electrode wheel 304 and the second electrode wheel 305 are both made of oxygen-free copper, with a surface roughness Ra≤0.4μm. They are electrically connected to the positive and negative poles of the toughening power supply, respectively. When the metal wire passes through the first electrode wheel 304 and the second electrode wheel 305, the current generates Joule heating through the resistance of the metal wire itself, achieving online contact toughening of the metal wire, eliminating internal stress generated during wire drawing, and refining the metallographic structure.

[0052] Furthermore, the fifth guide roller 302 and the sixth guide roller 303 are mounted on the rotating arm 33. A rotating shaft is fixedly mounted at the center of the rotating arm 33. One end of the rotating shaft is rotatably mounted on the second partition 31 via a bearing, and the other end of the rotating shaft is connected to the output shaft of the servo motor via a planetary reducer. The servo motor can drive the rotating shaft to deflect the rotating arm 33, thereby changing the position of the fifth guide roller 302 and the sixth guide roller 303 and adjusting the wire tension. For every 1° deflection of the rotating arm 33, the wire travel distance between the fifth guide roller 302 and the sixth guide roller 303 changes by 2mm-5mm. The effective length of the wire released by the deflection of the rotating arm 33 is always less than the effective toughening length between the first electrode wheel 304 and the second electrode wheel 305, ensuring that the wire released by the rotating arm 33 can fully enter the toughening zone between the two electrode wheels, achieving uniform heating and avoiding problems such as localized unheated or insufficient heating.

[0053] A steam section 34 is provided in the toughening zone between the first electrode wheel 304 and the second electrode wheel 305. Figure 4 The rotating arm 33 deflects downwards, releasing the tension of the metal wire and releasing a section of the wire. The length of the released wire is slightly shorter than the effective toughening length in the steam section 34. When the wire released by the rotating arm 33 enters the toughening zone, it remains within the protective atmosphere of the steam section, preventing localized oxidation during heating. The second partition 31 corresponding to the steam section 34 has 12 sets of steam holes 341 evenly arranged along the direction of the metal wire's travel. The diameter of the steam holes 341 is 1mm-2mm, and the spacing between adjacent steam holes 341 is 10mm-15mm. The steam holes 341 are connected to an external saturated steam supply source via pipelines. The saturated steam pressure is 0.2MPa-0.4MPa, and the temperature is 120℃-140℃. During the toughening process, saturated steam is evenly injected into the steam section 34 through the steam holes 341, forming a protective atmosphere on the surface of the high-temperature metal wire to prevent high-temperature oxidation.

[0054] The feeding side cavity of the second electrode wheel 305 is a cooling section 32. The effective cooling length of the cooling section 32 along the direction of the metal wire travel is greater than the effective toughening length between the first electrode wheel 304 and the second electrode wheel 305. This ensures that the metal wire heated in the toughening zone can be completely drawn into the cooling section 32 for forced cooling, preventing the uncooled metal wire from being exposed to air and undergoing secondary oxidation. Simultaneously, it ensures that the metallographic structure of the toughened metal wire can be stabilized, guaranteeing the consistency of the toughening effect. A circulating cooling pipeline is installed within the cooling section 32. The inlet and outlet of the circulating cooling pipeline are connected to an external chiller via pipelines. The chiller's outlet water temperature is controlled between 20℃ and 25℃, with temperature fluctuations not exceeding ±1℃. This allows for forced cooling of the toughened high-temperature metal wire, stabilizing the toughened metallographic structure.

[0055] See Figure 11 When the device in this embodiment is working normally, the metal wire output through the buffer adjustment section 2 passes through the fourth guide wheel 301, the fifth guide wheel 302 and the sixth guide wheel 303 in sequence to change direction, then enters the first electrode wheel 304, passes through the steam section 34 and passes through the second electrode wheel 305, enters the cooling section 32 for cooling, and finally is output to the subsequent winding device through the wire outlet at the end of the toughening treatment section 3.

[0056] See Figure 12During the toughening process, the metal wire between the first electrode wheel 304 and the second electrode wheel 305 is heated to the toughening temperature. Driven by the winding device, the metal wire needs to enter the cooling section 32 from the steam section 34 for cooling. However, the metal wire in the steam section 34 has already been heated to a plastic state. During winding, if the wire release from the preceding drawing section 1 or the guide wheel is uneven, the metal wire in the cooling section 32 can easily be pulled thinner, causing a significant change in wire diameter. In traditional processes, it is necessary to control the start / stop of the winding motor or the winding speed to reduce the rate of change in wire diameter at this location. That is, the change in wire diameter of the metal wire caused by the tension during the winding process when transitioning from the steam section 34 to the cooling section 32. In traditional processes, this process involves passive adjustment of the winding motor, that is, first obtaining the state of the metal wire through the wire diameter sensor and tension sensor, and then improving or maintaining the state of the metal wire by controlling the start / stop of the winding motor or the winding speed. However, in essence, this process in traditional technology still involves pulling the metal wire forward by the tension during winding, so there will still be some changes in wire diameter after the metal wire is wound up.

[0057] To mitigate the wire diameter variation caused by pulling or stretching, this embodiment includes a buffer adjustment section 2 and a rotating arm 33 in the toughening treatment section 3. Specifically, when the wire needs to transition from the steam section 34 to the cooling section 32, the control unit activates the servo motor driving the rotating shaft on the rotating arm 33, causing the rotating arm 33 to rotate clockwise. This lifts the fifth and sixth wire guide rollers 302 and 303 on the rotating arm 33 a certain distance in the opposite direction to the direction of pressing the wire, releasing the wire wound on the fifth and sixth wire guide rollers 302 and 303. Figure 12The rotating arm 33 in the middle swings clockwise, loosening the part of the metal wire that it has been pressing, and at this time the effective length of the released metal wire is less than the effective toughening length. When the tension of the metal wire is released, the winding device is started, pulling the metal wire from the steam section 34 to the cooling section 32. When the effective length of the released metal wire is less than the effective toughening length, it can be ensured that the metal wire released by the rotating arm 33 can completely enter the toughening treatment section 3 for toughening heating. Also, because the metal wire is in a relaxed state of tension, after being guided by the winding, the previously heated metal wire smoothly enters the cooling section 32 for cooling. Moreover, this pulling process will not cause excessive plastic deformation to the metal wire in the plastic state, thereby ensuring the consistency of the wire diameter before and after toughening. In addition, since the entire process of releasing and rewinding the metal wire is continuous, during the winding process, by reasonably controlling the winding speed and the swing speed and swing angle of the rotating arm 33, the released metal wire will not detach too much from the groove on the fifth guide wheel 302 or the sixth guide wheel 303, thus ensuring the stability of the metal wire's path in the toughening treatment section 3. Furthermore, when the control unit receives the signal that winding is required, the rotating arm 33 will immediately swing, without affecting work efficiency.

[0058] Further, see Figure 13 After the rotating arm 33 completes its clockwise swing, it needs to return to its initial position to restore the tension of the wire and facilitate the next wire release operation. At this time, the rotating arm 33 needs to swing counterclockwise. To ensure that the wire in the steam section 34 is not pulled in the opposite direction during the reset process, causing a sudden increase in wire tension, the control unit needs to actively release the wire in the buffer adjustment section 2. This involves controlling the rotating motor 26 of the buffer adjustment section 2 to move the second guide wheel 202 upwards via the active adjustment seat 24, shortening the center distance between the first guide wheel 201 and the second guide wheel 202, thus reducing the tension of the wire and releasing the wire stored in the buffer adjustment section 2. The length of the released wire is slightly greater than the wire travel required for the rotating arm 33 to reset, compensating for changes in wire travel during the reset process. When the rotating arm 33 actively swings counterclockwise, the wire stored in the buffer adjustment section 2 compensates for the required wire travel during reset, preventing pulling on the wire in the steam section 34 or cooling section 32 and causing changes in wire diameter or a sudden increase in tension. This ensures that the tension of the metal wire in the rotating arm 33 remains stable after reset.

[0059] After the rotating arm 33 is reset, the active adjustment seat 24 can drive the second wire guide wheel 202 to move downward and reset. In conjunction with the wire feeding speed of the wire drawing section 1, a section of metal wire is stored again in the buffer adjustment section 2 to prepare for the next pulling action.

[0060] It should be added that the reset process of the rotating arm 33 is carried out after the previously heated metal wire has successfully entered the cooling section 32 for cooling. After the rotating arm 33 is reset, the second wire guide wheel 202 also needs to be reset. The metal wire in the buffer adjustment section 2 up to the rotating arm 33 is not heated, so its plastic deformation ability is relatively poor. The second wire guide wheel 202 is located at the wire outlet 101 of the drawing section 1, and can directly store and release the metal wire according to the wire exit situation. At the same time, a wire diameter sensor 5 is set at the end of the buffer adjustment section 2 to detect the degree of change in the wire diameter of the metal wire stored in the buffer adjustment section 2. In conjunction with the displacement sensor 4 set in the buffer adjustment section 2, it actively adjusts the tension of the metal wire in the buffer adjustment section 2 to ensure that the metal wire in the buffer adjustment section 2 is always within a suitable tension range, and to ensure the consistency of the wire diameter of the metal wire entering and leaving the buffer adjustment section 2.

[0061] In Example 2, the wire diameter sensor 5 is located at the outlet of the buffer adjustment section 2 to detect changes in the wire diameter of the metal wire stored in the buffer adjustment section 2. However, the wire diameter result detected by the wire diameter sensor 5 is reactive. That is, when the second guide wheel 202 moves down to actively increase the tension of the stored metal wire, if the wire diameter sensor 5 detects a change in wire diameter, the metal wire between the first guide wheel 201 and the second guide wheel 202 has already been stretched. In Example 1, to improve this situation, the second guide wheel 202, which is directly connected to the active adjustment seat 24, is driven to move by the rotary motor 26 to actively adjust the tension of the metal wire. However, since the adjustment result requires a period of time before the wire diameter sensor 5 can detect that the metal wire has returned to the preset wire diameter size, it is difficult to adjust the tension in a timely manner.

[0062] To avoid the problem of delayed detection results from wire diameter sensor 5, this embodiment discloses a wire toughening adjustment device for wire drawing processes, see [reference]. Figures 8 to 10 Its main structure is the same as that of Embodiment 1, except that the active adjustment mechanism is further provided with an auxiliary adjustment component, which includes an auxiliary adjustment seat 27 and a repulsion unit 28.

[0063] See Figure 8The active adjustment seat 24 is loosely fitted onto the lead screw 261 and can freely move along the axis of the lead screw 261. The auxiliary adjustment seat 27 is threadedly connected to the lead screw 261 and is located directly below the active adjustment seat 24. The lead screw 261 can drive the auxiliary adjustment seat 27 to move along the axis of the lead screw 261 under the drive of the rotary motor 26. The repulsion unit 28 is disposed between the lower end face of the active adjustment seat 24 and the upper end face of the auxiliary adjustment seat 27. The slide 22 is fixedly connected to the active adjustment seat 24 by bolts. The second wire guide wheel 202 is installed on the slide 22. The second wire guide wheel 202 is a counterweight wheel. The downward pressure of the second wire guide wheel 202 can keep the metal wire in a tightened state. The size of the counterweight of the second wire guide wheel 202 depends on the material of the metal wire.

[0064] See Figure 9 and Figure 10 The repulsion unit 28 includes a first housing 281, a second housing 282, a first permanent magnet 2811, a second permanent magnet 2821, and a coil 2822. Both the first housing 281 and the second housing 282 are made of non-magnetic stainless steel to avoid interfering with the magnetic field of the permanent magnets. The first housing 281 is bolted to the lower end face of the active adjustment seat 24. The first permanent magnet 2811 can be a neodymium iron boron permanent magnet with a remanence of not less than 1.45T, and is fixedly embedded in the inner cavity of the first housing 281 with epoxy resin. The second housing 282 is bolted to the upper end face of the auxiliary adjustment seat 27. The second permanent magnet 2821 is made of the same material as the first permanent magnet 2811 and is also fixedly embedded in the inner cavity of the second housing 282 with epoxy resin. The first permanent magnet 2811 and the second permanent magnet 2821 are arranged opposite each other with the same poles. The magnetization direction of both is vertical. The opposing magnetic poles are both N poles or both S poles. A repulsive gap with a thickness of 3mm-8mm is formed between them. The magnitude of the permanent magnet repulsive force increases nonlinearly as the repulsive gap decreases. For every 1mm decrease in the repulsive gap, the permanent magnet repulsive force increases by no less than 50N.

[0065] Furthermore, the coil 2822 is made of enameled copper wire, which is located inside the cavity of the second housing 282 and wound around the second permanent magnet 2821. The conductive lead of the coil 2822 is electrically connected to the control unit. By passing DC currents of different directions and magnitudes through the coil 2822, an additional vertical magnetic field can be generated. The additional magnetic field is superimposed on the magnetic field of the permanent magnet, thereby adjusting the magnitude of the repulsive force between the first permanent magnet 2811 and the second permanent magnet 2821 in real time. When the additional magnetic field generated by the current flowing through the coil 2822 is in the same direction as the magnetic field of the permanent magnet, the repulsive force between them increases; when the additional magnetic field generated by the current flowing through the coil 2822 is in the opposite direction to the magnetic field of the permanent magnet, the repulsive force between them decreases.

[0066] Specifically, this embodiment uses a repulsion unit 28 to form a non-contact repulsion structure with a first permanent magnet 2811 and a second permanent magnet 2821 with opposite poles. By applying forward and reverse currents to the coil 2822, the magnitude of the repulsion between them can be adjusted in real time. When the additional magnetic field generated by the applied current is in the same direction as the magnetic field of the permanent magnet, the repulsion increases; when the additional magnetic field generated by the applied current is in the opposite direction to the magnetic field of the permanent magnet, the repulsion decreases. Thus, when the control unit obtains the detection result from the wire diameter sensor 5, it can immediately adjust the tension of the metal wire stored in the buffer adjustment section 2 based on the detection result. That is, the second wire guide wheel can achieve instantaneous micro-fluctuation of the second wire guide wheel 202 based on the wire diameter detection result combined with tension fluctuation feedback, forming a non-contact buffer compensation. This effectively eliminates the problem of delayed detection results or lag in adjustment actions of the wire diameter sensor 5.

[0067] In addition, the auxiliary adjustment component set in this embodiment avoids mechanical fatigue, wear and rigid impact problems compared with the traditional spring buffer structure, thus extending the service life of the device. At the same time, through the rapid adjustment of the current, the coordinated cooperation between tension micro-adjustment and stroke dynamic compensation is realized, which significantly improves the response capability to high-frequency tension fluctuations, further reduces the tension fluctuation range of the metal wire before and after toughening, and ensures the consistency of the metal wire diameter and the stability of the toughening effect.

[0068] Furthermore, in this second embodiment, the lead screw 261 rotates, driving the auxiliary adjusting seat 27 to move vertically. Then, the repulsion unit 28 further drives the active adjusting seat 24 to move vertically synchronously. This achieves large-stroke adjustment required for long-term changes in the wire diameter and adjustments to production conditions, with an adjustment stroke range of 0-200mm. When the wire experiences instantaneous high-frequency tension fluctuations, there is no need to drive the rotary motor 26. The control unit only needs to control the current flowing through the coil 2822 in real time to change the magnitude of the repulsion force of the repulsion unit 28, driving the auxiliary adjusting seat 27 and the second wire guide wheel 202 to achieve fine vertical floating adjustment, with a floating stroke range of 0-5mm, thereby quickly completing tension buffering compensation. During the fine floating adjustment process, the length of the wire released by the rotating arm 33 remains less than the length of the steam section, thus not affecting the uniform heating of the wire and the steam protection effect.

[0069] To verify the technical effects of the above-described embodiments of the present invention, a comparative verification experiment was conducted under unified benchmark conditions. The test benchmark was set as follows: the raw material was Φ8mm oxygen-free copper wire, the target wire diameter of the finished product was Φ0.8mm, the continuous wire drawing production speed was set to 1200m / min, the toughening treatment temperature was set to 550℃, and the test environment was a standard production workshop with constant temperature and humidity, with an ambient temperature of 23℃±2℃ and a relative humidity of 50%±5%. The continuous production test duration for each scheme was 72 hours, and the average values ​​of various performance parameters were statistically analyzed. The test results are shown in Table 1 below:

[0070]

[0071] The results of the comparative experiments in Table 1 above show that:

[0072] Existing conventional wire drawing and toughening technology is limited by a passive buffering adjustment mode. Its tension adjustment response speed is ≥200ms, the tension fluctuation of the metal wire before and after entering and exiting the toughening treatment section 3 is large, and the wire diameter change rate is ≤2.5%, which cannot fully adapt to the high-speed continuous production conditions of 1200m / min.

[0073] In the first embodiment of the present invention, the active adjustment mechanism is driven by the lead screw 261 of the buffer adjustment section 2, which, together with the wire diameter sensor 5 and the displacement sensor 4, realizes active tension control. At the same time, the rotating arm 33 of the toughening treatment section 3 realizes the coordinated tension adjustment of the metal wire during the toughening process. Compared with the existing conventional solutions, its tension adjustment response speed is improved to ≤50ms, the tension fluctuation range of the metal wire before toughening is narrowed to ±5%, the tension fluctuation range after toughening is narrowed to ±6%, and the wire diameter change rate is reduced to ≤0.8%.

[0074] The second embodiment of the present invention adds an auxiliary adjustment component with a repulsion unit 28 to the first embodiment. Through the non-contact repulsion buffer structure formed by the same pole relative to the permanent magnet, the coordinated operation of large stroke basic adjustment and micro-amplitude dynamic compensation is realized. Compared with the first embodiment, its tension adjustment response speed is improved to ≤5ms, the tension fluctuation range before toughening of the metal wire is narrowed to ±2%, the tension fluctuation range after toughening is narrowed to ±2.5%, and the wire diameter change rate is reduced to ≤0.3%.

[0075] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0076] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

Claims

1. A wire toughening adjustment device for wire drawing process, characterized in that, It includes a drawing section (1), a buffer adjustment section (2), and a toughening treatment section (3) connected in sequence. The buffer adjustment section (2) includes an active adjustment mechanism and a first wire guide wheel (201), a second wire guide wheel (202), and a third wire guide wheel (203) through which the metal wire passes in sequence. The first wire guide wheel (201) and the third wire guide wheel (203) are coaxially arranged. The second wire guide wheel (202) is vertically slidably arranged below the first wire guide wheel (201). The active adjustment mechanism is used to move the second wire guide wheel (202) up and down to adjust the tension of the metal wire. The toughening treatment section (3) is provided with a wire guide wheel and two electrode wheels in sequence along the direction of the metal wire travel. At least one adjacent wire guide wheel is provided with a deflectable rotating arm (33). A steam section (34) is also provided between the two electrode wheels. A cooling section (32) is provided on the feeding side of the last electrode wheel. The rotating arm (33) is used to release the metal wire into the steam section (34) or the cooling section (32). The active adjustment mechanism includes an active adjustment seat (24) connected to the second guide wheel (202) and a lead screw module for driving the active adjustment seat (24) to move vertically; The active adjustment mechanism also includes an auxiliary adjustment component, which includes an auxiliary adjustment seat (27) and a repulsion unit (28) disposed between the active adjustment seat (24) and the auxiliary adjustment seat (27). The repulsion unit (28) includes a first permanent magnet (2811) and a second permanent magnet (2821) disposed opposite to each other with the same poles, and a coil (2822) for adjusting the repulsion between the two. The first permanent magnet (2811) is connected to the active adjustment seat (24), and the second permanent magnet (2821) is connected to the auxiliary adjustment seat (27). The lead screw module drives the active adjustment seat (24) to move through the auxiliary adjustment seat (27). A repulsive gap is formed between the first permanent magnet (2811) and the second permanent magnet (2821). After current is passed through the coil (2822), an additional magnetic field is generated to adjust the magnitude of the repulsive force, thereby causing the second wire guide wheel (202) to float slightly. The repulsive gap is 3mm to 8mm. The coil (2822) is used to pass forward and reverse current to adjust the magnitude of the repulsive force between the first permanent magnet (2811) and the second permanent magnet (2821), thereby causing the second wire guide wheel (202) to float slightly.

2. The wire toughening adjustment device according to claim 1, characterized in that, The second wire guide wheel (202) is vertically slidably disposed directly below the first wire guide wheel (201); the buffer adjustment section (2) further includes a displacement sensor (4) for detecting the displacement of the second wire guide wheel (202) and a wire diameter sensor (5) disposed at the end of the buffer adjustment section (2) for detecting the wire diameter.

3. The wire toughening adjustment device according to claim 2, characterized in that, The lead screw module drives the second wire guide wheel (202) to generate displacement based on the detection signals of the wire diameter sensor (5) and the displacement sensor (4) in order to adjust the tension of the metal wire.

4. The wire toughening adjustment device according to claim 1, characterized in that, The length of the metal wire released by the deflection of the rotating arm (33) is less than the effective toughening length between the two electrode wheels, and the change in the wire travel distance between the fifth wire guide wheel (302) and the sixth wire guide wheel (303) at both ends of the rotating arm (33) is 2 to 5 mm for every 1° deflection of the rotating arm (33).

5. The wire toughening adjustment device according to claim 1, characterized in that, The steam section (34) includes multiple steam holes (341) arranged along the direction of the metal wire travel, so as to introduce protective gas into the toughening zone; the cooling section (32) is used to cool the toughened metal wire; the effective cooling length of the cooling section (32) is greater than the effective toughening length between the two electrode wheels.

6. The wire toughening adjustment device according to claim 3, characterized in that, A control unit is provided between the buffer adjustment section (2) and the toughening treatment section (3); The control unit is configured to control the rotating arm (33) to release the wire to compensate for the change in wire travel when the wire is transitioning between the buffer adjustment section (2) and the toughening treatment section (3), and to control the active adjustment mechanism to compensate for the change in wire travel when the rotating arm (33) is reset.

7. The wire toughening adjustment device according to claim 6, characterized in that, The wire diameter sensor (5) is located between the buffer adjustment section (2) and the toughening treatment section (3). The displacement sensor (4) is fixed on the vertical sliding path of the second wire guide wheel (202). The wire diameter sensor (5) and the displacement sensor (4) are electrically connected to the control unit respectively.

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