A drawing device for producing copper-clad steel wire

Abstract

The present application relates to copper clad steel wire drawing technical field, specifically a kind of copper clad steel wire production drawing device, including chassis and the top fixed connection of support frame of its, the bottom of crossbeam is fixedly connected with guide rail frame, the inside sliding connection of guide rail frame has work type sliding block one, and the bottom of work type sliding block one is fixedly connected with bearing frame, the bottom both sides of bearing frame are fixedly connected with support;The present application is compared with prior art, and the periodic reverse bending load is applied to wire by the reciprocating deflection mechanism of turnover frame driving arc-shaped fixture, to realize the dynamic elimination of copper clad steel wire winding stress in stages with the bidirectional constraint structure of "positioning roller support+arc-shaped fixture pressing", effectively offsetting spiral stress, avoid the bending problem caused by stress residual of wire, significantly improve the uniformity and reliability of wire pretreatment.

Description

Technical Field

[0001] This invention relates to the field of copper-clad steel wire drawing technology, specifically a drawing device for copper-clad steel wire production. Background Technology

[0002] The drawing process involves fixing one end of a metal wire to the chuck of a drawing machine, while the other end passes through the die hole. The drawing machine then applies tension, causing the metal wire to pass through the die hole under tension, thus reducing the wire's diameter and elongating it. During this process, the metal undergoes plastic deformation, and its microstructure and properties change accordingly.

[0003] For example, Chinese patent application number 2024108245227 describes a drawing device for copper wire production. After the copper wire is unwound, it lacks an effective mechanism to eliminate the initial spiral stress generated during the winding process. It only relies on static structures such as multiple straightening wheels to provide linear traction or fixed angle constraints. It cannot dynamically adjust the contact position and constraint method according to the curvature difference when the copper wire is drawn out with different layers (such as the curvature change caused by the reduction of the coil diameter). It also cannot continuously offset the winding stress inside the copper wire through periodic reverse bending loads. This static processing method easily leads to a large amount of "memory" bending stress remaining after the wire is unwound, which can cause problems such as axial displacement, surface wrinkles, or even stress concentration fractures in subsequent drawing, seriously affecting the wire processing accuracy and quality stability. Summary of the Invention

[0004] The purpose of this invention is to provide a drawing device for producing copper-clad steel wire, which solves the technical problems mentioned in the background section above.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a drawing device for producing copper-clad steel wire, comprising a chassis and a crossbeam fixedly connected to its top via a support frame, a guide rail frame fixedly connected to the bottom of the crossbeam, an I-shaped slider slidably connected inside the guide rail frame, and a bearing frame fixedly connected to the bottom of the I-shaped slider, with supports fixedly connected to both sides of the bottom of the bearing frame, and a central rotating rod movably connected to one side of the two adjacent supports via a bearing; A flipping frame is fixedly fitted on the outer wall of the main rotating rod. A slide rail is fixedly connected to one side of the flipping frame. An I-shaped slider is slidably connected inside the slide rail. An electric push rod is fixedly connected to the outer side of the I-shaped slider. An arc-shaped clamp is fixedly connected to the output end of the electric push rod.

[0006] Furthermore, vertical plates are fixedly connected to both sides of the bottom of the support frame and between the two supports, and positioning rollers are fixedly connected between the two vertical plates. Through slots are opened at the center of the positioning rollers and on the outer side of the vertical plates, and the main rotating rod is located in the through slot.

[0007] Furthermore, the inner sidewalls of each position of one of the supports are respectively movably connected by bearings to a passive worm gear, a driving worm, and a linkage eccentric block. A motor for driving the driving worm to rotate is also fixedly installed inside the support. The driving worm cooperates with the passive worm gear. A connecting rod is rotatably connected to one side of the passive worm gear, and one end of the connecting rod is rotatably connected to the linkage eccentric block.

[0008] Furthermore, one end of the linkage eccentric block is fixedly connected to a short shaft, and one end of the short shaft extends to the outside of the support and is fixedly connected to one end of the main rotating rod.

[0009] Furthermore, multiple sets of limiting rails are symmetrically fixedly installed at the bottom of the support frame, and a semi-circular sliding groove is opened inside the limiting rail. A protrusion is fixedly connected to the side wall of the flipping frame, and the protrusion is slidably connected in the semi-circular sliding groove. A limiting groove is opened at the bottom of the support frame at the position corresponding to the limiting rail.

[0010] Furthermore, a support platform is fixedly installed on the top of the chassis, and a frame is installed on one side of the support platform, with two transmission chain plates installed inside the frame.

[0011] Furthermore, sleeves are fixedly connected at equal intervals on the outer side of the transmission chain plate. A retaining rod is connected inside the sleeve through a compression spring, and the retaining rod is slidably connected inside the sleeve. An arc-shaped cover is fixedly connected to one end of the retaining rod located outside the sleeve.

[0012] Furthermore, the inside of the guide rail frame is movably connected to a threaded rod one via a bearing, and the inside of the slide rail is movably connected to a threaded rod two via a bearing. The I-shaped slider one and the I-shaped slider two are respectively threadedly connected to the corresponding threaded rod one and threaded rod two via threaded grooves penetrating the side walls. An electric lifting material rack is fixedly installed on one side of the bottom of the crossbeam, and a wire drawing die is fixedly installed on the top of the support platform.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. The precise control effect of dynamic stress elimination and adaptive bending adjustment is achieved by using the frustum-shaped structure design of the positioning roller and the reciprocating deflection mechanism of the flipping frame to realize the staged dynamic elimination of winding stress of copper-clad steel wire. When the wire is drawn out from coils of different layers, the positioning roller can automatically match the bending difference caused by the change in coil diameter through the horizontal displacement driven by a servo motor. This ensures that the contact position of the wire on the conical surface of the positioning roller is always consistent with the current bending radius. At the same time, the flipping frame, driven by the active worm gear and passive worm wheel transmission pair, drives the arc-shaped clamp to apply a periodic reverse bending load to the wire. Through the bidirectional constraint structure of "positioning roller support + arc-shaped clamp pressing", the spiral stress generated inside the wire due to winding is effectively offset, avoiding the wire bending problem caused by residual stress in traditional devices, and significantly improving the uniformity and reliability of wire pretreatment.

[0014] 2. The high-precision pulling and guiding effect of elastic clamping conveying and multi-mechanism linkage: In the conveying stage after stress relief, the elastic clamping system composed of the upper and lower symmetrical transmission chain plates in the frame, the arc cover and the compression spring, realizes the flexible and stable conveying of the wire. The adaptive elastic clamping design of the arc-shaped cover can avoid surface damage caused by rigid clamping. At the same time, the buffering effect of the compression spring effectively counteracts the lateral vibration and offset during the wire movement, ensuring that the wire enters the drawing die with constant tension and a straight trajectory. In addition, the front positioning roller and the arc-shaped clamping mechanism, and the rear transmission chain plate and the clamping mechanism of the arc-shaped cover form a mechanical linkage, constructing a precision control system for the entire process from wire feeding, stress treatment to drawing, which significantly improves the accuracy and production efficiency of copper-clad steel wire drawing. Attached Figure Description

[0015] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings; Figure 1 This is a schematic diagram of the frame structure in this invention; Figure 2 This is a schematic diagram of the guide rail frame structure in this invention; Figure 3 This is a schematic diagram of the electric actuator structure in this invention; Figure 4 This is a schematic diagram of the main rotating rod structure in this invention; Figure 5 This is a schematic diagram of the flipping frame structure in the present invention; Figure 6 This is a schematic diagram of the support structure in this invention; Figure 7 This is a schematic diagram of the limiting track structure in this invention; Figure 8 This is a schematic diagram of the linkage structure in this invention; Figure 9 This is a schematic diagram of the internal structure of the frame in this invention; Figure 10 This is a schematic diagram of the arc-shaped cover structure in this invention; Figure 11 This is a schematic diagram showing the wire laying direction of the copper-clad steel wire according to the present invention.

[0016] Reference numerals: 1. Chassis; 2. Crossbeam; 3. Guide rail frame; 4. Bearing frame; 5. Support; 6. Main rotating rod; 7. Tilting frame; 8. Electric push rod; 801. Slide rail; 9. Arc-shaped clamp; 10. Positioning roller; 11. Passive worm gear; 12. Active worm gear; 13. Linkage eccentric block; 14. Connecting rod; 15. Limiting rail; 16. Limiting groove; 17. Electric lifting material rack; 18. Wire drawing die; 19. Frame; 20. Transmission chain plate; 21. Sleeve; 22. Arc-shaped cover. Detailed Implementation

[0017] 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.

[0018] Example 1: As Figures 1-11 As shown, a drawing device for producing copper-clad steel wire includes a chassis 1 and a crossbeam 2 fixedly connected to its top via a support frame. A guide rail frame 3 is fixedly connected to the bottom of the crossbeam 2. An I-shaped slider is slidably connected inside the guide rail frame 3. A bearing frame 4 is fixedly connected to the bottom of the I-shaped slider. Supports 5 are fixedly connected to both sides of the bottom of the bearing frame 4. A central rotating rod 6 is movably connected to the adjacent side of the two supports 5 via a bearing. A flipping frame 7 is fixedly fitted on the outer wall of the main rotating rod 6. A slide rail 801 is fixedly connected to one side of the flipping frame 7. An I-shaped slider 2 is slidably connected inside the slide rail 801. An electric push rod 8 is fixedly connected to the outer side of the I-shaped slider 2. An arc-shaped clamp 9 is fixedly connected to the output end of the electric push rod 8.

[0019] Vertical plates are fixedly connected to both sides of the bottom of the support frame 4 and between the two supports 5, and positioning rollers 10 are fixedly connected between the two vertical plates. Figure 5 As shown, the positioning roller 10 is shaped like a frustum. A through groove is provided at the center of the positioning roller 10 and on the outer side of the vertical plate, and the main rotating rod 6 is located in the through groove.

[0020] One of the supports 5 has a passive worm gear 11, a driving worm gear 12, and a linkage eccentric block 13 movably connected to the inner sidewalls of each position via bearings. The support 5 also has a motor fixedly installed inside to drive the driving worm gear 12 to rotate. The driving worm gear 12 cooperates with the passive worm gear 11. A connecting rod 14 is rotatably connected to one side of the passive worm gear 11, and one end of the connecting rod 14 is rotatably connected to the linkage eccentric block 13.

[0021] One end of the linkage eccentric block 13 is fixedly connected to a short shaft, and one end of the short shaft extends to the outside of the support 5 and is fixedly connected to one end of the main rotating rod 6.

[0022] Multiple sets of limiting rails 15 are symmetrically fixedly installed at the bottom of the support frame 4. The interior of the limiting rail 15 is provided with a semi-circular groove. The side wall of the flipping frame 7 is fixedly connected with a protrusion, and the protrusion is slidably connected in the semi-circular groove. A limiting groove 16 is provided at the bottom of the support frame 4 and at the position corresponding to the limiting rail 15.

[0023] Example 2: A support platform is fixedly installed on the top of the chassis 1. A frame 19 is installed on one side of the support platform, and two transmission chain plates 20 are installed inside the frame 19. It should be explained here that, as Figure 9 As shown, two transmission chain plates 20 installed inside the frame 19 have meshing gears installed on one side. One of the transmission chain plates 20 is driven by a drive motor installed outside the frame 19. While the drive motor drives the corresponding transmission chain plate 20, it also drives the gear to rotate. Through meshing with the other gear, it drives the transmission chain plate 20 located directly below to move in the opposite direction synchronously.

[0024] Sleeves 21 are fixedly connected at equal intervals on the outer side of the transmission chain plate 20. A clamping rod is connected inside the sleeve 21 by a compression spring, and the clamping rod is slidably connected inside the sleeve 21. An arc-shaped cover 22 is fixedly connected to one end of the clamping rod outside the sleeve 21. The two transmission chain plates 20 are synchronously and in opposite directions, and the arc-shaped cover 22 with elastic clamping function cooperates with each other. The arc-shaped cover 22 is located above and below the copper-clad steel wire and is used to assist in clamping and conveying the copper-clad steel wire to ensure that it does not deviate during movement.

[0025] Inside the guide rail frame 3, a threaded rod 1 is movably connected via bearings. A servo motor 1 for driving the threaded rod 1 to rotate is fixedly installed on the outside of the guide rail frame 3. Inside the slide rail 801, a threaded rod 2 is movably connected via bearings. Inside the slide rail 801, a servo motor 2 for driving the threaded rod 2 to rotate is fixedly installed. I-shaped slider 1 and I-shaped slider 2 are respectively threadedly connected to the corresponding threaded rod 1 and threaded rod 2 via threaded grooves penetrating the side walls. An electric lifting material rack 17 is fixedly installed on one side of the bottom of the crossbeam 2. The electric lifting material rack 17 is used to place copper-clad steel wire. A wire drawing die 18 is fixedly installed on the top of the support platform. It should be explained here that the wire drawing die 18 is existing equipment used for drawing copper-clad steel wire.

[0026] As can be seen from Embodiment 1 and Embodiment 2, the working principle of the present invention is as follows: Step 1: Initialization and release of string tension and operation principle of the mechanical orientation system of the tilting frame 7: The electric lifting rack 17 carries and provides stable support for the copper-clad steel wire coil. During unwinding, the wire is drawn from the lower end of the coil and moves along a top-to-bottom path around the outer frustum surface of the positioning roller 10, forming an initial bending guide trajectory before entering the frame 19. When the first end of the copper-clad steel wire passes the outer position of the positioning roller 10, the drive motor integrated inside the support 5 starts, driving the active worm gear 12 to rotate at a constant speed around the bearing axis. The active worm gear 12 and the passive worm wheel 11 convert the rotational motion into the low-speed rotational motion of the passive worm wheel 11 through tooth surface meshing. The connecting rod 14, which is rotatably connected to the end face of the passive worm wheel 11, moves synchronously with the passive worm wheel 11. Its other end is rotatably connected to the linkage eccentric block 13. Through the eccentricity design, the circular motion of the passive worm wheel 11 is converted into the reciprocating rotational drive of the linkage eccentric block 13. The linkage eccentric block 13 is rigidly connected to the main rotating rod 6 through a short shaft, causing the main rotating rod 6 to periodically reciprocate within the bearing hole of the support 5. The tilting frame 7 is sleeved and fixed on the outer edge of the main rotating rod 6 and swings synchronously with the main rotating rod 6. Its side wall protrusion is embedded in the semi-circular groove of the bottom limiting track 15 of the bearing frame 4. The curvature of the groove matches the maximum deflection angle of the tilting frame 7, ensuring that the protrusion slides along the preset trajectory. The bottom limiting groove 16 of the bearing frame 4 provides movement space for the tilting frame 7, avoids interference, and allows the tilting frame 7 to complete reciprocating deflection within a range of ±45° (limited according to the curvature of the groove of the limiting track 15). When the flipping frame 7 swings, the I-shaped slider 2 installed on the slide rail 801 drives the arc-shaped clamp 9 through the electric push rod 8, so that it always maintains the contact pressure with the wire on the outer surface of the positioning roller 10. By utilizing the truncated cone of the positioning roller 10, the wires drawn out from different layers of the winding naturally fit into the corresponding conical section when they contact the positioning roller 10, thus initially releasing the spiral stress generated by winding.

[0027] Step 2: Bending Dynamic Adaptation Mechanism and Stress Relief Strengthening Process: As the number of layers in the copper-clad steel wire coil decreases, the initial bending radius of the drawn copper-clad steel wire gradually decreases (the decrease in coil diameter leads to a change in the curvature of the wire). The electric lifting rack 17 adaptively lifts and lowers to ensure that the wire is level with the top of the positioning roller 10. At this time, the servo motor starts and drives the threaded rod 1 in the guide rail frame 3 to rotate. The threaded rod 1 and the threaded groove of the I-shaped slider 1 form a helical transmission pair, which drives the support frame 4 to move horizontally along the guide rail frame 3 until the contact section of the frustum surface of the positioning roller 10 matches the current curvature of the wire (e.g., when the coil diameter decreases, the bending radius of the wire decreases, and the positioning roller 10 moves horizontally to make the wire fit a gentler conical slope). Simultaneously, the servo motor 2 drives the threaded rod 2 in the slide rail 801, which drives the electric push rod 8 to move horizontally along the slide rail 801 through the I-shaped slider 2, so that the lateral position of the arc-shaped clamp 9 is synchronized with the adjustment amount of the positioning roller 10. The telescopic rod of the electric push rod 8 extends, pushing the inner arc surface of the arc clamp 9 to fit against the outer surface of the wire, forming a two-way constraint structure of "positioning roller 10 support + arc clamp 9 pressing". When the flipping frame 7 reciprocates under the drive of the main rotating rod 6, the arc clamp 9 swings periodically with the flipping frame 7, forcing the copper-clad steel wire to bend in the opposite direction on the surface of the positioning roller 10 (opposite to the original winding direction). Since the frustum structure of the positioning roller 10 allows the contact point to be dynamically adjusted along the axial direction, combined with the synchronous displacement of the arc clamp 9, it ensures that no matter how the wire winding layers change, the two always apply alternating bending load to the copper-clad steel wire at the optimal contact position, gradually offsetting the plastic deformation stress accumulated during the winding process. During this process, the thrust of the electric push rod 8 is automatically adjusted by the control system according to the wire diameter to maintain a constant contact pressure to adapt to wires with different material hardness.

[0028] Step 3: Integration of the flexible clamping and conveying system with the pull-out guide mechanism: After the stress-relieved wire enters the frame 19, it is clamped and conveyed by two symmetrically arranged transmission chain plates 20. The drive motor inside the frame 19 drives the two transmission chain plates 20 to move synchronously in opposite directions through a gear set, ensuring that the wire is subjected to uniform longitudinal traction force during the conveying process. Inside the sleeves 21 fixed at equal intervals on the outside of the transmission chain plates 20, compression springs are fitted on the outside of the clamping rod to form an elastic buffer structure. When the wire diameter changes, the clamping rod can slide inside the sleeve 21. The clamping force of the arc-shaped cover 22 is adaptively adjusted by the elastic force of the compression spring to avoid surface damage caused by rigid extrusion. The inner arc surface curvature of the arc-shaped cover 22 matches the outer diameter of the wire. The upper and lower arc-shaped covers 22 form a centering clamping structure to counteract the lateral vibration and offset during the movement of the wire. Under the traction of the transmission chain plate 20, the wire enters the drawing die 18 at the top of the support platform at a constant speed to complete the drawing and diameter reduction process.

[0029] Throughout the conveying process, the preload of the compression spring (limited by the internal structure of the sleeve 21) ensures that the arc-shaped cover 22 and the wire always maintain flexible contact, providing sufficient friction to drive the wire to move while allowing the wire to adjust radially within a small range, avoiding stress concentration caused by rigid positioning. The adaptive lifting of the guide rail frame 3 and the electric lifting material rack 17, and the internal spatial layout of the frame 19 ensure a smooth transition of the wire from stress relief to drawing. The orientation adjustment of the positioning roller 10 and the arc-shaped clamp 9, and the clamping mechanism of the transmission chain plate 20 and the arc-shaped cover 22 form a mechanical linkage, jointly constructing a precision control system for the entire process from the wire feeding end to the drawing end, effectively solving the problem of wire bending caused by winding stress.

[0030] 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 any specific implementation. 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. A drawing device for producing copper-clad steel wire, comprising a chassis (1) and a crossbeam (2) fixedly connected to its top via a support frame, characterized in that, The bottom of the crossbeam (2) is fixedly connected to a guide rail frame (3), and an I-shaped slider is slidably connected inside the guide rail frame (3). The bottom of the I-shaped slider is fixedly connected to a support frame (4), and both sides of the bottom of the support frame (4) are fixedly connected to supports (5). The two supports (5) are movably connected to a main rotating rod (6) through a bearing on the adjacent side. A flipping frame (7) is fixedly fitted on the outer wall of the main rotating rod (6). A slide rail (801) is fixedly connected to one side of the flipping frame (7). An I-shaped slider II is slidably connected inside the slide rail (801). An electric push rod (8) is fixedly connected to the outer side of the I-shaped slider II. An arc-shaped clamp (9) is fixedly connected to the output end of the electric push rod (8). The support frame (4) has vertical plates fixedly connected to both sides of its bottom and between two supports (5), and a positioning roller (10) is fixedly connected between the two vertical plates. The center of the positioning roller (10) and the outer side of the vertical plate are both provided with through slots, and the main rotating rod (6) is located in the through slot. One of the supports (5) has a passive worm gear (11), an active worm (12) and a linkage eccentric block (13) movably connected to the inner sidewall of each position via bearings. The support (5) also has a motor fixedly installed inside for driving the active worm (12) to rotate. The active worm (12) cooperates with the passive worm gear (11). A connecting rod (14) is rotatably connected to one side of the passive worm gear (11). One end of the connecting rod (14) is rotatably connected to the linkage eccentric block (13). One end of the linkage eccentric block (13) is fixedly connected to a short shaft, and one end of the short shaft extends to the outside of the support (5) and is fixedly connected to one end of the main rotating rod (6). The bottom of the support frame (4) is symmetrically fixedly installed with multiple sets of limiting rails (15). The interior of the limiting rails (15) is provided with a semi-circular groove. The side wall of the flipping frame (7) is fixedly connected with a protrusion, and the protrusion is slidably connected in the semi-circular groove. The bottom of the support frame (4) and the position corresponding to the limiting rails (15) are provided with a limiting groove (16).

2. The drawing device for producing copper-clad steel wire according to claim 1, characterized in that, A support platform is fixedly installed on the top of the chassis (1), and a frame (19) is installed on one side of the support platform. Two transmission chain plates (20) are installed inside the frame (19).

3. The drawing device for producing copper-clad steel wire according to claim 2, characterized in that, The outer side of the transmission chain plate (20) is fixedly connected with sleeves (21) at equal intervals. The inside of the sleeve (21) is connected to a retaining rod by a compression spring, and the retaining rod is slidably connected inside the sleeve (21). An arc-shaped cover (22) is fixedly connected to one end of the retaining rod outside the sleeve (21).

4. The drawing device for producing copper-clad steel wire according to claim 3, characterized in that, The guide rail frame (3) is connected to a threaded rod 1 via a bearing, and the slide rail (801) is connected to a threaded rod 2 via a bearing. The I-shaped slider 1 and I-shaped slider 2 are respectively connected to the corresponding threaded rod 1 and threaded rod 2 via threaded grooves penetrating the side wall. An electric lifting material rack (17) is fixedly installed on one side of the bottom of the crossbeam (2), and a wire drawing die (18) is fixedly installed on the top of the support platform.

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