Copper-clad-steel continuous casting production line, and steel wire conveying method and device therefor

Abstract

A copper-clad-steel continuous casting production line, and a steel wire conveying method and device therefor. The method comprises the following steps continuously executed during continuous casting production: controlling a front-end pushing mechanism to continuously pull a processed steel wire to move in a continuous casting traveling direction by applying a first radial acting force to the processed steel wire; and controlling a rear-end pull-out mechanism to stepwise pull the processed steel wire coated with a copper layer to move in the continuous casting traveling direction by applying a second radial acting force to the processed steel wire, wherein the first radial acting force is always less than 80% of the second radial acting force, such that the processed steel wire in the copper-clad-steel continuous casting production line moves as a whole in the continuous casting traveling direction in a stepwise manner synchronously with stepwise pulling. The above-mentioned solution helps to alleviate or even eliminate the risk of the steel wire being easily broken and cracking, thereby improving the production yield and efficiency of continuous casting of copper-clad steel.

Description

Copper-clad steel continuous casting production line and steel wire conveying method and apparatus therefor. Technical Field

[0001] This disclosure relates to the field of metal continuous casting composite technology, and in particular to a copper-clad steel continuous casting production line and a steel wire conveying method and device for the copper-clad steel continuous casting production line, specifically used to drive the steel wire to convey the steel wire and to pull the copper-clad steel billet out of the continuous casting furnace. Background Technology

[0002] In the production of various steel products, there are two methods for solidifying liquid metal: the traditional die casting method and the continuous casting method. The principle of continuous casting is to continuously pour molten metal into a crystallizer and then continuously pull it out from the other end of the crystallizer, which can produce materials of any length or a specific length.

[0003] Taking copper-clad steel (also known as copper-coated steel) as an example, it is also called copper-clad steel bimetallic composite material. It is a composite conductor made of copper and steel through a special process. This conductor has both the high strength, excellent elasticity, large thermal resistance and high magnetic permeability of steel, and the good electrical conductivity and excellent corrosion resistance of copper. It is widely used in the electrical and electronic fields.

[0004] In the production of copper-clad steel (CCS) materials, a drive or traction device is installed at the outlet of the continuous casting furnace to pull the CCS material out of the furnace. This drive requires significant power, posing a risk of the steel wire breaking or cracking, potentially leading to a low yield and consequently reducing production efficiency. Furthermore, during the initial pulling process from the furnace, there is a possibility of unsuccessful pulling, which also impacts efficiency. Therefore, it is necessary to address the issues of pulling the CCS material from the continuous casting furnace and the forward transport of the raw steel wire.

[0005] Therefore, there is an urgent need to provide a new method and device for steel wire conveying in copper-clad steel continuous casting production lines, so as to at least partially alleviate or solve the above-mentioned problems and defects of existing solutions. Summary of the Invention

[0006] One objective of this disclosure is to provide a copper-clad steel continuous casting production line and a steel wire conveying method and device for the copper-clad steel continuous casting production line in order to alleviate or eliminate the aforementioned defects in existing copper-clad steel continuous casting production technology and production line.

[0007] This disclosure provides a method for conveying steel wire in a copper-clad steel continuous casting production line, the production line including a continuous casting furnace with a crystallizer assembly, characterized in that a front-end pushing mechanism is provided before the inlet end of the continuous casting furnace, a rear-end pulling mechanism is provided after the outlet end of the continuous casting furnace, and includes the following steps continuously performed during continuous casting production:

[0008] The front-end pushing mechanism is controlled to continuously pull the steel wire being processed along the continuous casting travel direction by applying a first radial force to the steel wire being processed.

[0009] The rear pull-out mechanism is controlled to stepwise pull the steel wire being processed along the continuous casting travel direction by applying a second radial force to the copper-coated steel wire being processed.

[0010] The first radial force is always less than 80% of the second radial force, so that the steel wire being processed in the copper-clad steel continuous casting production line moves along the continuous casting direction in a stepping manner that is basically synchronized with the stepping traction.

[0011] In this article, "continuous traction" refers to the continuous output of the driving force of the front-end pushing mechanism, which is transmitted to the longitudinal (length direction) traction force of the steel wire being processed via a first radial force. "Stepping traction" refers to the stepping output or periodically intermittent supply of the driving force of the front-end pushing mechanism, which is transmitted to the longitudinal traction force (longitudinal direction, i.e., the length direction of the steel wire) of the steel wire being processed via a second radial force. Furthermore, the term "front-end pushing mechanism" is used for ease of understanding as being located in front of the continuous casting furnace and used to push / drive the steel wire into the furnace, while the term "rear-end pull-out mechanism" is used for ease of understanding as being located behind the continuous casting furnace and used to pull the steel wire out of the furnace. These two terms do not imply that either applies only pushing or only pulling force. Both "front-end pushing mechanism" and "rear-end pull-out mechanism" should be understood as driving mechanisms or components that guide the movement of the steel wire along the continuous casting direction.

[0012] It is generally believed that continuous casting processes for copper-clad steel (such as horizontal continuous casting) evolved from and were applied to the continuous casting of single-metal materials such as copper. In single-metal continuous casting, a walking beam drive is used to pull the metal billet from the furnace. Compared to copper-clad steel continuous casting, it eliminates the need for a feeding stage and its power supply (roughly understood as eliminating the need to drive the steel wire into the furnace). Furthermore, the walking beam drive used to pull the billet can even be equipped with functions for pulling, stopping, and retracting the billet. Copper-clad steel continuous casting evolved from single-metal continuous casting. Its key difference lies in the need to consider the feeding action of guiding / driving the steel wire into the furnace and the billet pulling action after the furnace. Copper-clad steel continuous casting typically still uses a walking beam system to pull the billet after the furnace. This walking beam system provides the time required for the copper cladding to solidify in the furnace and executes the pulling / stopping cycle of the metal billet. Therefore, stepper drive devices, such as stepper motors, are well-suited to serve as the active driving power source and to pull out the copper-clad steel billet in a step-by-step manner after the furnace. Meanwhile, since both the upstream and / or downstream stages of the copper-clad steel continuous casting production line may require continuous power output to ensure the processing effect of each stage (for example, uncoiling and straightening in the upstream process may require continuous power output), there will inevitably be a certain degree of inconsistency in the upstream and downstream power systems within the production line.

[0013] However, in the practice of copper-clad steel continuous casting, it is often found that although the aforementioned stepping power system provides the time required for the copper cladding layer to solidify and yields copper-clad steel products with better performance, there is a certain probability or proportion of defects such as the copper-clad steel wire being broken, cracked, or slightly or even significantly infiltrated (i.e., copper material seeping into the core of the wire formed by the steel wire) in the copper-clad steel wire obtained downstream of the continuous casting furnace after a series of processing steps. Because the entire processing involves many factors, and the inherent characteristics of the continuous casting production line do not allow for immediate shutdown for inspection upon discovering problems, and because the crystallization stage in continuous casting is essentially impossible to monitor externally in real time due to the extremely high temperature environment inside the furnace, the causes and factors leading to the above defects, as well as their magnitude, are difficult to determine.

[0014] The steel wire conveying methods and apparatus of the various embodiments presented in this disclosure are based on experience with metal continuous casting technology and its implementation, as well as production lines and production practices, and the following profound insights derived therefrom.

[0015] Although the characteristics and quality of the raw steel wire in its initial unprocessed state, the processes and parameters of each processing step in the continuous casting process, and the process parameters of the continuous casting furnace such as temperature control can all cause the aforementioned defects of copper-clad steel wire breakage, cracking, or copper infiltration, the steel wire's ability to resist tensile stress weakens under high-temperature conditions, making it unable to withstand, for example, the net tensile force applied to the steel wire during the pull / stop cycle of the stepper motor (i.e., the tensile force applied by the stepper motor is superimposed with the undesirable resistance applied to the steel wire by the front motor). The inconsistency between the front and rear power and the characteristics of the stepping tensile force output by the rear drive device or the rear pull-out mechanism result in relatively large tension (or tensile stress) on the steel wire at moments such as the moment of pull-out. This is one of the key factors leading to the breakage, cracking, and copper infiltration (a large amount of copper seeping into the steel material) caused by the cracking of the steel wire. Therefore, in the continuous casting process of copper-clad steel, by properly matching the driving methods of the front push force and the tensile force applied after the furnace, the tension or stress on the steel in the furnace can be alleviated.

[0016] Therefore, by appropriately improving or configuring the power devices (such as motors) located before and after (i.e. upstream and downstream) the continuous casting furnace (crystallization furnace) to apply force to the steel wire being processed and the process of power transmission, it will help to alleviate or even eliminate the above defects by reducing the maximum tensile stress borne by the steel wire under high temperature conditions in the furnace.

[0017] According to some embodiments of this disclosure, the first radial force is always maintained within the range of 5% to 60% of the second radial force.

[0018] According to some embodiments of the present disclosure, the front-end pushing mechanism includes a continuous first driver and a first transmission assembly. The first transmission assembly includes a first rotating wheel and a second rotating wheel. A first channel section for the steel wire to be processed is provided between the first rotating wheel and the second rotating wheel. The first driver is used to drive the rotation of at least one of the first rotating wheel and the second rotating wheel.

[0019] The rear pull-out mechanism includes a stepping second driver and a second transmission assembly. The second transmission assembly includes a third wheel and a fourth wheel. A second channel section for the steel wire to be processed is provided between the third wheel and the fourth wheel. The second driver is used to drive the rotation of at least one of the third wheel and the fourth wheel.

[0020] The first and second rollers are configured to apply a first radial force to the steel wire being processed relative to each other to generate a first frictional force acting on the steel wire being processed, and the third and fourth rollers are configured to apply a second radial force to the steel wire being processed relative to each other to generate a second frictional force acting on the steel wire being processed.

[0021] The system includes a first channel segment and a similar second transmission assembly between the first and second rotating wheels. This can be understood as multiple rotating wheels of the transmission assembly distributed on both sides of the travel path of the processed steel wire, thereby defining the radial dimension of the first channel segment in a direction perpendicular to the axis of the processed steel wire (i.e., perpendicular to the travel path). For example, in horizontal continuous casting, one optional design for the transmission assembly is that multiple rotating wheels vertically define the radial dimension of the first channel segment. This radial dimension is approximately consistent with the radial dimension of the processed steel wire through which the channel segment passes in the production line. The processed steel wire may differ in size and surface properties, such as surface hardness, depending on the processing steps it undergoes.

[0022] According to some embodiments of this disclosure, the output frequency of the stepper-type second driver is in the range of 60-130 cycles / minute, each cycle comprising an output period and a pause period, the pause period being in the range of 0.3-0.8 seconds, the output period being in the range of 0.08-0.25 seconds, and the workpiece wire being driven to travel at an overall travel speed in the range of 30-50 cm / minute. Preferably, the output frequency of the stepper-type second driver is in the range of 80-110 cycles / minute, the pause period in each cycle being in the range of 0.4-0.6 seconds, the output period being in the range of 0.10-0.15 seconds, and the workpiece wire being driven to travel at an overall travel speed in the range of 30-50 cm / minute.

[0023] According to some embodiments of this disclosure, the copper-clad steel continuous casting production line produces copper-clad steel wire with a first coating thickness. The first transmission component and the second transmission component are configured such that the difference between the diameter of the second channel defined by the third and fourth rotating wheels in the second channel segment and the diameter of the first channel defined by the first and second rotating wheels in the first channel segment is slightly less than twice the first coating thickness.

[0024] Therefore, the traction assembly's impeller behind the furnace (i.e., the continuous casting furnace) clamps the steel wire more tightly than the impeller in front of the furnace, thus preventing slippage of the impeller assembly behind the furnace, while allowing slippage of the impeller assembly in front of the furnace. In this article, the expressions "slightly greater than" and "slightly less than" generally refer to a difference less than 1 / 10 of the latter, preferably less than 1 / 20 of the latter.

[0025] According to some embodiments of this disclosure, the first transmission assembly further includes a flexible force-applying component, wherein the first and second rollers are substantially fixed such that the diameter of the first channel segment is equal to or slightly larger than the diameter of the steel wire being processed. The substantially fixed is defined as having a movable amount only along the line connecting the first and second rollers or only along the radial direction of the first channel segment. The flexible force-applying component and at least one of the first and second rollers are connected to apply a variable force that tends to bring one of them closer to the other. The variable force decreases as the first and second rollers approach each other.

[0026] This ensures that the first radial force and the resulting first frictional force are not too small to lose the traction effect in front of the furnace, while also ensuring that the force is not too large to always provide the necessary slippage capacity to buffer the steel wire during the conveying process. It also alleviates the steel wire vibration that may be caused by the asynchrony of the traction forces in front of and behind the furnace, for example, by limiting the maximum amplitude of the vibration to a certain extent.

[0027] According to some embodiments of this disclosure, the second transmission assembly further includes a rigid force-applying component, and the third and fourth rollers are substantially fixed such that the diameter of the second channel segment is equal to or slightly larger than the diameter of the steel wire being processed. The rigid force-applying component and at least one of the third and fourth rollers are connected to apply a constant force that tends to bring one of them closer to the other.

[0028] One preferred way to implement the "rigid force application component" is to use a hydraulic device, which can keep the force applied by the third and fourth rollers to the steel wire being processed at a constant value through hydraulic means. This constant value ensures the accurate implementation of the step-by-step pull / stop cycle.

[0029] According to some embodiments of this disclosure, a cutting mechanism, a straightening mechanism, and a polishing mechanism are sequentially arranged upstream of the continuous casting furnace, and the front-end pushing mechanism is arranged between at least two of the cutting mechanism, the straightening mechanism, the polishing mechanism, and the continuous casting furnace, or the front-end pushing mechanism is arranged between two adjacent ones;

[0030] A cooling device and a rear pull-out mechanism are sequentially arranged downstream of the continuous casting furnace.

[0031] This disclosure also provides a wire conveying device for a copper-clad steel continuous casting production line, the copper-clad steel continuous casting production line including a continuous casting furnace with a crystallizer assembly, characterized in that the wire conveying device includes:

[0032] A front-end pushing mechanism is disposed in front of the inlet end of the continuous casting furnace and is configured to continuously pull the steel wire being processed along the continuous casting travel direction by applying a first radial force to the steel wire being processed.

[0033] The rear pull-out mechanism is located after the outlet end of the continuous casting furnace and is configured to stepwise pull the steel wire being processed along the continuous casting travel direction by applying a second radial force to the copper-coated steel wire being processed.

[0034] The first radial force is always less than 80% of the second radial force, so that the steel wire being processed in the copper-clad steel continuous casting production line moves along the continuous casting direction in a stepping manner that is basically synchronized with the stepping traction.

[0035] According to some embodiments of this disclosure, the front-end pushing mechanism and the rear-end pulling mechanism are configured such that the first radial force is always maintained within the range of 5% to 60% of the second radial force.

[0036] According to some embodiments of the present disclosure, the front-end pushing mechanism includes a continuous first driver and a first transmission assembly. The first transmission assembly includes a first rotating wheel and a second rotating wheel. A first channel section for the steel wire to be processed is provided between the first rotating wheel and the second rotating wheel. The first driver is used to drive the rotation of at least one of the first rotating wheel and the second rotating wheel.

[0037] The rear pull-out mechanism includes a stepping second driver and a second transmission assembly. The second transmission assembly includes a third wheel and a fourth wheel. A second channel section for the steel wire to be processed is provided between the third wheel and the fourth wheel. The second driver is used to drive the rotation of at least one of the third wheel and the fourth wheel.

[0038] The first and second rollers are configured to apply a first radial force to the steel wire being processed relative to each other to generate a first frictional force acting on the steel wire being processed. The third and fourth rollers are configured to apply a second radial force to the steel wire being processed relative to each other to generate a second frictional force acting on the steel wire being processed. The first frictional force is always maintained within the range of 5% to 60% of the second frictional force.

[0039] According to some embodiments of this disclosure, the output frequency of the stepper-type second driver is in the range of 60-130 cycles / minute, each cycle comprising an output period and a pause period, the pause period being in the range of 0.3-0.8 seconds, the output period being in the range of 0.08-0.25 seconds, and the workpiece wire being driven to travel at an overall travel speed in the range of 30-50 cm / minute. Preferably, the output frequency of the stepper-type second driver is in the range of 80-110 cycles / minute, the pause period in each cycle being in the range of 0.4-0.6 seconds, the output period being in the range of 0.10-0.15 seconds, and the workpiece wire being driven to travel at an overall travel speed in the range of 30-50 cm / minute.

[0040] According to some embodiments of this disclosure, the copper-clad steel continuous casting production line produces copper-clad steel wire with a first coating thickness. The first transmission component and the second transmission component are configured such that the difference between the diameter of the second channel defined by the third and fourth rotating wheels in the second channel segment and the diameter of the first channel defined by the first and second rotating wheels in the first channel segment is slightly less than twice the first coating thickness.

[0041] According to some embodiments of this disclosure, the first transmission assembly further includes a flexible force-applying component, wherein the first and second rollers are substantially fixed such that the diameter of the first channel segment is equal to or slightly larger than the diameter of the steel wire being processed. The substantially fixed is defined as having a movable amount only along the line connecting the first and second rollers or only along the radial direction of the first channel segment. The flexible force-applying component and at least one of the first and second rollers are connected to apply a variable force that tends to bring one of them closer to the other. The variable force decreases as the first and second rollers approach each other.

[0042] According to some embodiments of this disclosure, the flexible force-applying component is a compression spring arranged along the line connecting the first and second rotating wheels or only in the radial direction along the first channel segment. One end of the compression spring is connected to the first or second rotating wheel, and the other end can be detachably attached to an optional spring mounting position of the first transmission assembly according to the desired amount of compression of the compression spring.

[0043] According to some embodiments of this disclosure, the movable amount is no more than 1 / 10 of the diameter of the steel wire being processed.

[0044] This disclosure also provides a copper-clad steel continuous casting production line, including:

[0045] A continuous casting furnace with a crystallizer assembly;

[0046] The wire conveying device for a copper-clad steel continuous casting production line as described in any of the preceding embodiments;

[0047] The cutting mechanism, straightening mechanism, and polishing mechanism are sequentially arranged upstream of the continuous casting furnace;

[0048] A cooling device located downstream of the continuous casting furnace and between the rear pull-out mechanism.

[0049] According to some embodiments, the copper-clad steel continuous casting production line further includes an uncoiling drive mechanism configured to cooperate with the uncoiling mechanism and a straightening drive mechanism configured to cooperate with the straightening mechanism. Both the uncoiling drive mechanism and the straightening drive mechanism are configured to clamp the steel wire to be processed in the radial direction. The uncoiling drive mechanism is configured to apply a third radial force to the steel wire to be processed, and the straightening drive mechanism is configured to apply a fourth radial force to the steel wire to be processed.

[0050] Furthermore, the fourth radial force is not less than 1.5 times the first radial force, and the third radial force is greater than the first radial force but less than the fourth radial force.

[0051] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present disclosure.

[0052] The positive and progressive effects of this disclosure are as follows:

[0053] The copper-clad steel continuous casting production line and the steel wire conveying method and device used in the copper-clad steel continuous casting production line disclosed herein help to at least mitigate or even eliminate the risk of steel wires being easily broken or cracked, thereby improving the yield and production efficiency of copper-clad steel continuous casting. Attached Figure Description

[0054] Figure 1 schematically shows an overall diagram of a copper-clad steel production line, which includes a wire conveying device according to a preferred embodiment of the present disclosure.

[0055] Explanation of reference numerals in the attached drawings: 1. Front-end pushing mechanism; 11. First roller; 12. Second roller; 2. Rear-end pulling mechanism; 21. Third roller; 22. Fourth roller; 3. Continuous casting furnace; 4. Cutting mechanism; 5. Straightening mechanism; 6. Polishing mechanism; 7. Cooling device; 8. Steel wire being processed; 1'. Uncoiling drive mechanism; 1”. Straightening drive mechanism Detailed Implementation

[0056] The preferred embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. The following description is exemplary and not intended to limit the present invention. Any other similar situations also fall within the protection scope of the present invention.

[0057] In the following detailed description, directional terms such as "left," "right," "up," "down," "front," and "back" are used with reference to the directions described in the accompanying drawings. Components of embodiments of the invention may be positioned in a variety of different orientations; the directional terms are for illustrative purposes and not limiting.

[0058] Referring to Figure 1, a preferred embodiment of the wire conveying device of this disclosure is used in a copper-clad steel continuous casting production line, wherein the copper-clad steel continuous casting production line includes a continuous casting furnace 3 with a crystallizer assembly.

[0059] Specifically, the steel wire conveying device includes:

[0060] A front-end pushing mechanism 1 is disposed in front of the inlet end of the continuous casting furnace 3 and is configured to continuously pull the steel wire 8 to be processed along the continuous casting direction by applying a first radial force to the steel wire 8.

[0061] The rear pull-out mechanism 2 is located after the outlet end of the continuous casting furnace 3 and is configured to be able to stepwise pull the steel wire 8 to be processed along the continuous casting travel direction in a manner that applies a second radial force to the steel wire 8 coated with copper layer.

[0062] The first radial force is always less than 80% of the second radial force, so that the steel wire 8 being processed in the copper-clad steel continuous casting production line moves along the continuous casting direction in a stepping manner that is basically synchronized with the stepping traction.

[0063] According to some preferred embodiments of this disclosure, the front-end pushing mechanism 1 and the rear-end pulling mechanism 2 are configured such that the first radial force is always maintained within the range of 5% to 60% of the second radial force, or optionally within the range of 10% to 40% of the second radial force.

[0064] According to some preferred embodiments of the present disclosure, the front-end pushing mechanism 1 includes a continuous first driver and a first transmission assembly. The first transmission assembly includes a first rotating wheel 11 and a second rotating wheel 12. A first channel section is provided between the first rotating wheel 11 and the second rotating wheel 12 for the steel wire 8 to be processed to pass through. The first driver is used to drive the rotation of at least one of the first rotating wheel 11 and the second rotating wheel 12.

[0065] The rear pull-out mechanism 2 includes a stepping second driver and a second transmission assembly. The second transmission assembly includes a third rotating wheel 21 and a fourth rotating wheel 22. A second channel section is provided between the third rotating wheel 21 and the fourth rotating wheel 22 for the steel wire 8 to be processed to pass through. The second driver is used to drive the rotation of at least one of the third rotating wheel 21 and the fourth rotating wheel 22.

[0066] The first roller 11 and the second roller 12 are configured to apply a first radial force to the steel wire 8 being processed relative to each other to generate a first frictional force acting on the steel wire 8 being processed. The third roller 21 and the fourth roller 22 are configured to apply a second radial force to the steel wire 8 being processed relative to each other to generate a second frictional force acting on the steel wire 8 being processed. The first frictional force is always maintained within the range of 5% to 60% of the second frictional force, or optionally within the range of 10% to 40% of the second frictional force.

[0067] In some specific examples, these rollers are configured with grooves, and correspondingly, the space between the grooves of the corresponding rollers defines a channel section through which the steel wire 8 to be processed passes in order to press out the steel wire.

[0068] According to some preferred embodiments of this disclosure, the output frequency of the stepper-type second driver is in the range of 60-130 cycles / minute, each cycle being an output period including an output time and a pause time, the pause time being in the range of 0.3-0.8 seconds, the output time being in the range of 0.08-0.25 seconds, and the steel wire being processed is driven to travel at an overall travel speed in the range of 30-50 cm / minute.

[0069] According to a further preferred embodiment of this disclosure, the output frequency of the stepper-type second driver is in the range of 80-110 cycles / minute, the pause time in each cycle is in the range of 0.4-0.6 seconds, the output time is in the range of 0.10-0.15 seconds, and the steel wire being processed is driven to travel at an overall travel speed in the range of 30-50 cm / minute.

[0070] In a further preferred embodiment, according to a specific embodiment that has been repeatedly adjusted and tested, the output frequency of the stepper second driver is in the range of 80-110 cycles / minute, the pause time in each cycle is in the range of 0.4-0.6 seconds, the output time is in the range of 0.10-0.15 seconds, and the steel wire being processed is driven to travel at an overall travel speed in the range of 30-50 cm / minute. According to this specific embodiment, the approximately 0.5-second pause in the pull-stop cycle is used for crystallization to ensure that the copper plating layer can be firmly coated on the surface of the steel wire, and the approximately 0.1-second pause is used for stepping to drive the steel wire forward. With nearly 100 pull-stop cycles per minute, based on an overall travel speed of 30-50 cm / min, there will be a travel difference of approximately 0.2-0.5 cm between the stepper motor and the continuous motor in each cycle if they do not slip, or in other words, a difference in the linear speed of the motor output. This may cause the steel wire to vibrate or be subjected to stress. The slippage setting described in detail below provides further buffering to alleviate the stress on the steel wire caused by the stepper pull-stop cycle.

[0071] According to some preferred embodiments of the present disclosure, the copper-clad steel continuous casting production line produces copper-clad steel wire with a first coating thickness. The first transmission component and the second transmission component are configured such that the difference between the diameter of the second channel defined by the third wheel 21 and the fourth wheel 22 in the second channel section and the diameter of the first channel defined by the first wheel 11 and the second wheel 12 in the first channel section is slightly less than twice the first coating thickness.

[0072] According to some preferred embodiments of this disclosure, the first transmission assembly further includes a flexible force-applying component. The first wheel 11 and the second wheel 12 are substantially fixed such that the diameter of the first channel segment is equal to or slightly larger than the diameter of the steel wire 8 being processed. The substantially fixed is defined as having a movable amount only along the line connecting the first wheel 11 and the second wheel 12. The flexible force-applying component and at least one of the first wheel 11 and the second wheel 12 are connected to apply a variable force that tends to bring one of them closer to the other. The variable force decreases as the first wheel and the second wheel approach each other.

[0073] According to some embodiments of this disclosure, the flexible force-applying component may specifically be an elastic element, and more preferably a compression spring arranged along the line connecting the first rotating wheel 11 and the second rotating wheel 12. One end of the compression spring is connected to the first rotating wheel 11 or the second rotating wheel 12, and the other end can be detachably attached to an optional spring mounting position of the first transmission assembly according to the desired compression amount of the compression spring.

[0074] Referring again to Figure 1, the front-end pushing mechanism 1 is located in front of the inlet end of the continuous casting furnace 3, and the rear-end pulling mechanism 2 is located behind the outlet end of the continuous casting furnace 3. The continuous casting furnace 3 is used to contain molten copper.

[0075] The front-end pushing mechanism 1 is located upstream of the continuous casting furnace 3, that is, before the inlet end of the continuous casting furnace 3; the rear-end pulling mechanism 2 is located downstream of the continuous casting furnace 3, that is, after the outlet end of the continuous casting furnace 3. It should be noted that in this embodiment of the invention, the inlet and outlet of the continuous casting furnace 3 are collinear in the horizontal direction. The continuous casting furnace 3 is used to contain molten copper and is suitable for horizontal hot-melt continuous casting. The steel wire to be processed enters the continuous casting furnace 3 and is coated with a copper layer inside the furnace to form the processed steel wire 8, which can also be understood as copper-coated steel wire.

[0076] Using the continuous casting furnace 3 as a dividing line, the front-end pushing mechanism 1 applies a preset thrust to the portion of the steel wire 8 before the inlet end of the continuous casting furnace 3, while the rear-end pulling mechanism 2 applies a preset tension to the portion of the steel wire 8 after the outlet end of the continuous casting furnace 3. The entire steel wire 8 is subjected to the combined force of the preset tension and the preset thrust. Under the dual action of the preset thrust of the front-end pushing mechanism 1 and the preset tension of the rear-end pulling mechanism 2, the steel wire 8 is successfully pulled out of the continuous casting furnace 3. The external force acting on the steel wire 8 is distributed in two parts to different parts of the steel wire 8 through the front-end pushing mechanism 1 and the rear-end pulling mechanism 2, resulting in a more uniform horizontal force distribution on the steel wire 8. This avoids the problem of excessive tensile stress on the steel wire 8 at the outlet end of the continuous casting furnace 3, solves the problem of the steel wire 8 being easily broken by the tension at the outlet end of the continuous casting furnace 3, and ensures that the steel wire 8 travels stably in the horizontal direction.

[0077] Furthermore, at the beginning of production, the combined action of the front-end pushing mechanism 1 and the rear-end pulling mechanism 2, along with the traction rod, can stably pull out the processed steel wire 8, greatly improving the success rate of pulling out. This solves the problem of unsuccessful pulling out of the processed steel wire 8 at the beginning of production, saves the debugging time for the first pull-out, and improves production efficiency.

[0078] At the start of production, the front-end pushing mechanism 1 is used to pull the steel wire being processed along the continuous casting travel direction 8 into the inlet end of the continuous casting furnace 3 and from the inlet end of the continuous casting furnace 3 to the outlet end, until the traction rod at the outlet end of the continuous casting furnace 3 provides traction. After the steel wire being processed 8 is led out from the outlet end of the continuous casting furnace 3 to the traction wheel, the rear-end pulling mechanism 2 provides tension to the steel wire being processed 8.

[0079] It should be noted that the preset tension and preset thrust are in the same direction, both extending horizontally. The preset thrust can be understood as pulling the steel wire being processed towards the continuous casting furnace 3 and moving it along the continuous casting direction, while the preset tension can be understood as pulling the steel wire being processed 8 outward from the continuous casting furnace 3.

[0080] Some method embodiments of this disclosure also provide a method for wire conveying in a copper-clad steel continuous casting production line, which generally has the same or similar characteristics as the wire conveying apparatus of some preferred embodiments described above. This wire conveying method includes the following steps, which are continuously performed during continuous casting production:

[0081] The front-end pushing mechanism 1 is controlled to continuously pull the steel wire 8 to be processed along the continuous casting direction by applying a first radial force to the steel wire 8 being processed.

[0082] The rear pull-out mechanism 2 is controlled to stepwise pull the steel wire 8 coated with copper layer to move it along the continuous casting direction by applying a second radial force to the steel wire 8 to be processed.

[0083] The first radial force is always less than 80% of the second radial force, so that the steel wire 8 being processed in the copper-clad steel continuous casting production line moves along the continuous casting direction in a stepping manner that is basically synchronized with the stepping traction.

[0084] According to some preferred embodiments of this disclosure, the first transmission assembly further includes a flexible force-applying component (e.g., an elastic element or a helical spring), and the first wheel 11 and the second wheel 12 are substantially fixed such that the diameter of the first channel segment is equal to or slightly larger than the diameter of the steel wire 8 being processed. The substantially fixed is defined as having a movable amount only along the line connecting the first wheel 11 and the second wheel 12. The flexible force-applying component and at least one of the first wheel 11 and the second wheel 12 are connected to apply a variable force (e.g., an elastic force) that tends to bring one of them closer to the other. The variable force decreases as the first wheel and the second wheel approach each other.

[0085] Therefore, it ensures that the first radial force and the resulting first frictional force are not too small to lose the traction effect at the furnace front, while also ensuring that the force is not too large to always provide the necessary slippage capacity to buffer the steel wire during the conveying process. This also mitigates the steel wire vibration that may be caused by the asynchrony of the traction forces at the furnace front and rear, for example, by limiting the maximum amplitude of the vibration. Furthermore, it should be understood that, according to some further preferred embodiments, from the perspective of the entire copper-clad steel continuous casting production line, only the aforementioned buffer point upstream of the continuous casting furnace has the necessary slippage capacity (e.g., achieved through a roller assembly that can slip to a certain extent) to resolve the problem of inconsistent power at different points on the production line. The steel wire vibration mentioned above, within a certain amplitude or range, is a design feature of the copper-clad steel continuous casting production line based on overall efficiency considerations. This is because such steel wire vibration, due to the aforementioned buffer point, will not adversely affect the production quality of the copper-clad steel continuous casting production line, and thus takes into account the requirements of both the billet pulling stage from the continuous casting furnace and the upstream uncoiling / straightening stage.

[0086] According to some embodiments of this disclosure, the second transmission assembly further includes a rigid force-applying component, and the third and fourth rollers are substantially fixed such that the diameter of the second channel segment is equal to or slightly larger than the diameter of the steel wire being processed. The rigid force-applying component and at least one of the third and fourth rollers are connected to apply a constant force that tends to bring one of them closer to the other.

[0087] The combination of the "rigid force-applying component" and the "flexible force-applying component" in the aforementioned embodiments is preferred. The "rigid force-applying component" can be a hydraulic device, which can keep the force applied to the steel wire by the third and fourth rotating wheels at a constant value through hydraulic means. This constant value ensures the accurate implementation of the step-by-step pull / stop cycle.

[0088] In a specific application example, the preset tension step output method can be set as follows: control the preset tension to maintain for a preset duration, or control the processed steel wire 8 to travel a preset length through the preset tension.

[0089] Maintaining the preset tension for a preset duration can be understood as follows: the rear pull-out mechanism 2 maintains a preset tension level for a preset duration. When the rear pull-out mechanism 2 provides the preset tension to the processed steel wire 8 for the preset duration, it stops providing the preset tension, and then resumes providing the preset tension for the preset duration after a set interval. Controlling the state of the rear pull-out mechanism 2 through timing is a simple control method.

[0090] Controlling the movement of the processed steel wire 8 by a preset tension force to a preset length can be understood as follows: once the preset length of movement of the processed steel wire 8 is determined, the rear pull-out mechanism 2 stops providing driving force. The preset length of movement of the processed steel wire 8 can be determined by detecting the length of movement of the processed steel wire 8; alternatively, if the rear pull-out mechanism 2 is equipped with a third rotating wheel 21 and a fourth rotating wheel 22, the length of movement of the processed steel wire 8 can be determined by recording the number of revolutions of the third rotating wheel 21 and the fourth rotating wheel 22; or, the rear pull-out mechanism 2 is equipped with a stepper motor, and the preset length of movement of the steel wire is controlled by the stepper motor.

[0091] In some embodiments, the preset tension is greater than the preset thrust, and the driving force provided by the rear pull-out mechanism 2 is greater than the driving force provided by the front push mechanism 1, so that the steel wire 8 being processed mainly bears the preset tension of the rear pull-out mechanism 2, while the preset thrust of the front push mechanism 1 (which can provide necessary slippage) plays an auxiliary pushing role.

[0092] In some embodiments, referring to FIG1, the front-end pushing mechanism 1 includes a continuous first driver (not shown in the figure) and a first transmission assembly. The first transmission assembly includes a first rotating wheel 11 and a second rotating wheel 12. A first channel section for the steel wire 8 to be processed is provided between the first rotating wheel 11 and the second rotating wheel 12. The first driver is used to drive the rotation of at least one of the first rotating wheel 11 and the second rotating wheel 12. The first driver is used to control the preset thrust output.

[0093] The first driver may be, but is not limited to, a motor. The first driver drives at least one of the first rotating wheel 11 and the second rotating wheel 12 to rotate. Through the surface friction between at least one of the first rotating wheel 11 and the second rotating wheel 12 and the steel wire 8 being processed, the steel wire is pulled forward 8 along the continuous casting travel direction. One of the first rotating wheel 11 and the second rotating wheel 12 provides the driving force, while the other provides auxiliary limiting; alternatively, both the first rotating wheel 11 and the second rotating wheel 12 are used to pull the steel wire being processed forward 8 along the continuous casting travel direction. The first channel section of the first rotating wheel 11 and the second rotating wheel 12 can be used to guide, pull, and limit the steel wire 8 being processed, moving it along a predetermined path in the continuous casting travel direction.

[0094] For example, the first roller 11 and the second roller 12 can be arranged side by side, one above the other, or they can be arranged in pairs but not aligned along the vertical axis. Of course, the number of the first roller 11 and the second roller 12 can be the same or different, as long as they can provide the appropriate functions of guiding, traction, and limiting the steel wire 8 being processed and apply appropriate force to the steel wire. The possible arrangements of the third roller 21 and the fourth roller 22 are similar to those of the first roller 11 and the second roller 12, so they will not be described in detail here.

[0095] For example, typical examples of drivers are relatively inexpensive continuous motors and stepper motors. The second driver can also be, but is not limited to, a motor. When the rear pull-out mechanism 2 steps to drive the steel wire 8 being processed, the second driver can be a stepper motor. The second driver is used to drive the rotation of at least one of the third roller 21 and the fourth roller 22. Through the surface friction between at least one of the third roller 21 and the fourth roller 22 and the steel wire 8 being processed, the steel wire being processed is pulled to move 8 along the continuous casting travel direction. The steel wire 8 is passed through a second channel section between the third roller 21 and the fourth roller 22. The rotation of at least one of the third roller 21 and the fourth roller 22 pulls the steel wire being processed to move 8 along the continuous casting travel direction.

[0096] The first driver continuously outputs the first rotational driving force, which can be understood as the first driver outputting the first torque, which is a constant value; the second driver outputs the second rotational driving force in a stepwise manner, and the second driver outputs the second torque, which is a constant value.

[0097] In some embodiments, in the step of controlling the second driver to output the second rotational driving force in a stepwise manner, the second rotational driving force is controlled to be maintained for a preset duration, or the second rotational driving force is controlled to drive the processed steel wire 8 to travel a preset length.

[0098] The stepping operation or drive control method of the rear pull-out mechanism 2 can be, for example, controlling the stepping motion of the second driver. The control method of the second driver can be: timing control; when the second driver is a motor, the number of revolutions of the second driver can be recorded; or control can be achieved by detecting the length of travel of the processed steel wire 8. The method of detecting the length of travel of the processed steel wire 8 can be by recording with markers, recording by travel speed, etc.

[0099] In some embodiments, referring to Figure 1, a cutting mechanism 4 (uncoiling mechanism), a straightening mechanism 5 and a polishing mechanism 6 are sequentially arranged upstream of the continuous casting furnace 3. Before the steel wire 8 to be processed enters the continuous casting furnace 3, the steel wire 8 to be processed is cut, straightened and polished to ensure that the steel wire 8 to be processed meets the casting requirements of copper-clad steel and to ensure the uniformity of the copper layer on the outside of the steel wire as much as possible.

[0100] A front-end drive mechanism can be optionally provided between the cutting mechanism 4, the straightening mechanism 5, and the polishing mechanism 6. The position and number of the front-end drive mechanism can be flexibly set. Its structure can be similar to the front-end push mechanism arranged in front of the furnace, but it does not provide the aforementioned slippage and buffer area. This means that when a continuous output type front-end drive mechanism is used, the corresponding mechanism, such as the cutting mechanism 4 and the straightening mechanism 5, will work or process continuously, during which the steel wire is also continuously driven to move forward.

[0101] The front drive mechanism can be positioned, for example, between two adjacent components, such as between the cutting mechanism 4 and the straightening mechanism 5, or between the straightening mechanism 5 and the polishing mechanism 6. The front drive mechanism can be positioned in one or more of the aforementioned locations. The position of the front drive mechanism is flexible, and its selection can be aimed at ensuring that the steel wire 8 being processed travels stably between two adjacent components.

[0102] When a front drive mechanism is set between the cutting mechanism 4 and the straightening mechanism 5, and between the straightening mechanism 5 and the polishing mechanism 6, a total of three drive mechanisms, including the front-end pushing mechanism 1 and the front drive mechanism, can be set upstream of the continuous casting furnace in the continuous casting production line. One rear pull-out mechanism 2 is also set. These three drive mechanisms can pull the steel wire to be processed towards the continuous casting furnace 3 and move it along the continuous casting direction 8. One rear pull-out mechanism 2 pulls the steel wire to be processed out of the continuous casting furnace 3. The steel wire to be processed is driven to move by a three-push-one-pull method. It can also drive the steel wire to be processed to move stably between two adjacent processes / components in front of the furnace, maintain the stability of the movement, and also ensure the processing accuracy of processes such as cutting (uncoiling), straightening, and polishing.

[0103] The current drive mechanism may include a first transmission component, which can guide and limit the steel wire 8 being processed. In processes such as cutting, straightening, and polishing, the steel wire 8 being processed can be accurately positioned, which helps to improve processing accuracy.

[0104] In some embodiments, a cooling device 7 and a rear pull-out mechanism 2 are sequentially arranged downstream of the continuous casting furnace 3. The rear pull-out mechanism 2 is located downstream of the cooling device 7. After the copper-coated steel wire 8 is coated, it is first cooled by the cooling device 7. The preset tension of the rear pull-out mechanism 2 is applied to the cooled steel wire 8, resulting in better structural stability and reducing the impact of the rear pull-out mechanism 2 on the structure of the steel wire 8. The rear pull-out mechanism 2 is adjacent to the cooling device 7, shortening the distance between the rear pull-out mechanism 2 and the continuous casting furnace 3, ensuring that the preset tension can stably pull out the steel wire 8 from the continuous casting furnace 3. The position of the rear pull-out mechanism 2 is reasonable, and the stress on the steel wire 8 is reasonable.

[0105] The structures of the aforementioned cutting mechanism 4, straightening mechanism 5, polishing mechanism 6, continuous casting furnace 3, and cooling device 7 are not limited, as long as they meet the requirements for horizontal continuous casting of copper-clad steel. It should be noted that the cutting mechanism 4, straightening mechanism 5, and polishing mechanism 6 must be able to be used in conjunction with the preceding drive mechanism.

[0106] According to a further preferred embodiment, the traction component or uncoiling drive mechanism 1' configured at the cutting mechanism 4, the traction component or straightening drive mechanism 1" configured at the straightening mechanism 5, and the front-end push mechanism 1 located upstream of the continuous casting furnace 3, as described in detail above, can adopt a generally similar structure to drive the steel wire. However, the specific configuration may differ slightly, especially in the setting of the radial force for clamping the processed steel wire and the further driving force. In some preferred embodiments, the straightening drive mechanism 1" at the straightening mechanism 5 clamps the steel wire with a greater radial force to prevent slippage. The clamping force at this location can be significantly greater than that of the uncoiling drive mechanism 1' at the cutting mechanism, and for example, more than 2-3 times the first radial force of the front-end push mechanism 1 located upstream of the continuous casting furnace 3. Since there is a considerable distance between the straightening mechanism 5 and the continuous casting furnace, the aforementioned design of the front-end push mechanism 1, located between the straightening mechanism 5 and the rear pull-out mechanism 2, which allows the steel wire to slip, can provide sufficient buffering to ensure that the possible vibrations of the steel wire in its upstream and downstream areas are within acceptable limits. As a result, the requirements of the continuous casting furnace billet pulling stage and the preceding uncoiling / straightening stage of the production line can be taken into account.

[0107] In other words, among the radial forces applied at various points on the production line as schematically shown in Figure 1, F4 and F2 are significantly greater than F1, while the radial force F3 can be designed according to the raw materials of the uncoiled steel wire, and in general F3 is also smaller than F4 and F2.

[0108] The copper-clad steel continuous casting production line and the steel wire conveying method and device for the copper-clad steel continuous casting production line disclosed herein help to at least mitigate or even eliminate the risk of steel wire being easily broken or cracked, thereby improving the yield and production efficiency of copper-clad steel continuous casting.

[0109] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A method for conveying steel wire in a copper-clad steel continuous casting production line, the copper-clad steel continuous casting production line comprising a continuous casting furnace with a crystallizer assembly, characterized in that, A front-end pushing mechanism is provided before the inlet end of the continuous casting furnace, and a rear-end pulling mechanism is provided after the outlet end of the continuous casting furnace, and the following steps are continuously performed during continuous casting production: The front-end pushing mechanism is controlled to continuously pull the steel wire being processed along the continuous casting travel direction by applying a first radial force to the steel wire being processed. The rear pull-out mechanism is controlled to stepwise pull the steel wire being processed along the continuous casting travel direction by applying a second radial force to the copper-coated steel wire being processed. The first radial force is always less than 80% of the second radial force, so that the steel wire being processed in the copper-clad steel continuous casting production line moves along the continuous casting direction in a stepping manner that is basically synchronized with the stepping traction.

2. The steel wire conveying method for a copper-clad steel continuous casting production line according to claim 1, characterized in that, The first radial force is always maintained within the range of 5% to 60% of the second radial force.

3. The steel wire conveying method for a copper-clad steel continuous casting production line according to claim 1 or 2, characterized in that, The front-end pushing mechanism includes a continuous first driver and a first transmission assembly. The first transmission assembly includes a first rotating wheel and a second rotating wheel. A first channel section is provided between the first rotating wheel and the second rotating wheel for the steel wire to be processed to pass through. The first driver is used to drive the rotation of at least one of the first rotating wheel and the second rotating wheel. The rear pull-out mechanism includes a stepping second driver and a second transmission assembly. The second transmission assembly includes a third wheel and a fourth wheel. A second channel section for the steel wire to be processed is provided between the third wheel and the fourth wheel. The second driver is used to drive the rotation of at least one of the third wheel and the fourth wheel. The first and second rollers are configured to apply a first radial force to the steel wire being processed relative to each other to generate a first frictional force acting on the steel wire being processed, and the third and fourth rollers are configured to apply a second radial force to the steel wire being processed relative to each other to generate a second frictional force acting on the steel wire being processed.

4. The steel wire conveying method for a copper-clad steel continuous casting production line according to claim 1, characterized in that, The output frequency of the stepper-type second driver is in the range of 60-130 cycles / minute, each cycle being an output period including an output time and a pause time, the pause time being in the range of 0.3-0.8 seconds, the output time being in the range of 0.08-0.25 seconds, and the steel wire being processed is driven to travel at an overall travel speed in the range of 30-50 cm / minute; Preferably, the output frequency of the stepper-type second driver is in the range of 80-110 cycles / minute, the pause time in each cycle is in the range of 0.4-0.6 seconds, the output time is in the range of 0.10-0.15 seconds, and the steel wire being processed is driven to travel at an overall travel speed in the range of 30-50 cm / minute.

5. The steel wire conveying method for a copper-clad steel continuous casting production line according to claim 3, characterized in that, The copper-clad steel continuous casting production line produces copper-clad steel wire with a first coating thickness. The first transmission component and the second transmission component are configured such that the difference between the diameter of the second channel defined by the third and fourth rotating wheels in the second channel section and the diameter of the first channel defined by the first and second rotating wheels in the first channel section is slightly less than twice the first coating thickness.

6. The steel wire conveying method for a copper-clad steel continuous casting production line according to claim 3, characterized in that, The first transmission assembly further includes a flexible force-applying component. The first and second rollers are substantially fixed such that the diameter of the first channel segment is equal to or slightly larger than the diameter of the steel wire being processed. The substantially fixed is defined as having a movable amount only along the line connecting the first and second rollers or only along the radial direction of the first channel segment. The flexible force-applying component and at least one of the first and second rollers are connected to apply a variable force that tends to bring one of them closer to the other. The variable force decreases as the first and second rollers approach each other.

7. The steel wire conveying method for a copper-clad steel continuous casting production line according to claim 6, characterized in that, The second transmission assembly also includes a rigid force-applying component, and the third and fourth rollers are substantially fixed such that the diameter of the second channel segment is equal to or slightly larger than the diameter of the steel wire being processed. The rigid force-applying component and at least one of the third and fourth rollers are connected to apply a constant force that tends to bring one of them closer to the other.

8. A wire conveying device for a copper-clad steel continuous casting production line, the copper-clad steel continuous casting production line comprising a continuous casting furnace with a crystallizer assembly, characterized in that, The steel wire conveying device includes: A front-end pushing mechanism is disposed in front of the inlet end of the continuous casting furnace and is configured to continuously pull the steel wire being processed along the continuous casting travel direction by applying a first radial force to the steel wire being processed. The rear pull-out mechanism is located after the outlet end of the continuous casting furnace and is configured to stepwise pull the steel wire being processed along the continuous casting travel direction by applying a second radial force to the copper-coated steel wire being processed. The first radial force is always less than 80% of the second radial force, so that the steel wire being processed in the copper-clad steel continuous casting production line moves along the continuous casting direction in a stepping manner that is basically synchronized with the stepping traction.

9. The wire conveying device for a copper-clad steel continuous casting production line according to claim 8, characterized in that, The front-end pushing mechanism and the rear-end pulling mechanism are configured such that the first radial force is always maintained within the range of 5% to 60% of the second radial force.

10. The wire conveying device for a copper-clad steel continuous casting production line according to claim 7 or 8, characterized in that, The front-end pushing mechanism includes a continuous first driver and a first transmission assembly. The first transmission assembly includes a first rotating wheel and a second rotating wheel. A first channel section is provided between the first rotating wheel and the second rotating wheel for the steel wire to be processed to pass through. The first driver is used to drive the rotation of at least one of the first rotating wheel and the second rotating wheel. The rear pull-out mechanism includes a stepping second driver and a second transmission assembly. The second transmission assembly includes a third wheel and a fourth wheel. A second channel section for the steel wire to be processed is provided between the third wheel and the fourth wheel. The second driver is used to drive the rotation of at least one of the third wheel and the fourth wheel. The first and second rollers are configured to apply a first radial force to the steel wire being processed relative to each other to generate a first frictional force acting on the steel wire being processed. The third and fourth rollers are configured to apply a second radial force to the steel wire being processed relative to each other to generate a second frictional force acting on the steel wire being processed. The first frictional force is always maintained within the range of 5% to 60% of the second frictional force.

11. The wire conveying device for a copper-clad steel continuous casting production line according to claim 8, characterized in that, The output frequency of the stepper-type second driver is in the range of 60-130 cycles / minute, each cycle being an output period including an output time and a pause time, the pause time being in the range of 0.3-0.8 seconds, the output time being in the range of 0.08-0.25 seconds, and the steel wire being processed is driven to travel at an overall travel speed in the range of 30-50 cm / minute; Preferably, the output frequency of the stepper-type second driver is in the range of 80-110 cycles / minute, the pause time in each cycle is in the range of 0.4-0.6 seconds, the output time is in the range of 0.10-0.15 seconds, and the steel wire being processed is driven to travel at an overall travel speed in the range of 30-50 cm / minute.

12. The wire conveying device for a copper-clad steel continuous casting production line according to claim 10, characterized in that, The copper-clad steel continuous casting production line produces copper-clad steel wire with a first coating thickness. The first transmission component and the second transmission component are configured such that the difference between the diameter of the second channel defined by the third and fourth rotating wheels in the second channel section and the diameter of the first channel defined by the first and second rotating wheels in the first channel section is slightly less than twice the first coating thickness.

13. The wire conveying device for a copper-clad steel continuous casting production line according to claim 10, characterized in that, The first transmission assembly further includes a flexible force-applying component. The first and second rollers are substantially fixed such that the diameter of the first channel segment is equal to or slightly larger than the diameter of the steel wire being processed. The substantially fixed is defined as having a movable amount only along the line connecting the first and second rollers or only along the radial direction of the first channel segment. The flexible force-applying component and at least one of the first and second rollers are connected to apply a variable force that tends to bring one of them closer to the other. The variable force decreases as the first and second rollers approach each other.

14. The wire conveying device for a copper-clad steel continuous casting production line according to claim 13, characterized in that, The flexible force-applying component is a compression spring arranged along the line connecting the first and second rotating wheels or only in the radial direction along the first channel segment. One end of the compression spring is connected to the first or second rotating wheel, and the other end can be detachably attached to an optional spring mounting position of the first transmission assembly according to the desired amount of compression of the compression spring.

15. The wire conveying device for a copper-clad steel continuous casting production line according to claim 13, characterized in that, The movable amount is no more than 1 / 10 of the diameter of the steel wire being processed.

16. The wire conveying device for a copper-clad steel continuous casting production line according to claim 13, characterized in that, The second transmission assembly also includes a rigid force-applying component, and the third and fourth rollers are substantially fixed such that the diameter of the second channel segment is equal to or slightly larger than the diameter of the steel wire being processed. The rigid force-applying component and at least one of the third and fourth rollers are connected to apply a constant force that tends to bring one of them closer to the other.

17. A copper-clad steel continuous casting production line, the copper-clad steel continuous casting production line comprising: A continuous casting furnace with a crystallizer assembly; A wire conveying device for a copper-clad steel continuous casting production line according to any one of claims 8-16; An uncoiling mechanism, a straightening mechanism, and a polishing mechanism are sequentially arranged upstream of the continuous casting furnace; A cooling device located downstream of the continuous casting furnace and between the rear pull-out mechanism.

18. The copper-clad steel continuous casting production line according to claim 17, characterized in that, The copper-clad steel continuous casting production line also includes an uncoiling drive mechanism that cooperates with the uncoiling mechanism and a straightening drive mechanism that cooperates with the straightening mechanism. Both the uncoiling drive mechanism and the straightening drive mechanism are configured to clamp the steel wire to be processed in the radial direction. The uncoiling drive mechanism is configured to apply a third radial force to the steel wire to be processed, and the straightening drive mechanism is configured to apply a fourth radial force to the steel wire to be processed. Furthermore, the fourth radial force is not less than 1.5 times the first radial force, and the third radial force is greater than the first radial force but less than the fourth radial force.

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