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

Abstract

The present disclosure discloses a copper-clad steel continuous casting production line and a steel wire conveying method and device therefor, the method comprising the following steps continuously performed during the continuous casting production: controlling the front-end pushing mechanism to continuously pull the processed steel wire to move along the continuous casting direction in a manner of applying a first radial force to the processed steel wire; controlling the rear-end pulling mechanism to step-by-step pull the processed steel wire to move along the continuous casting direction in a manner of applying a second radial force to the processed steel wire coated with a copper layer; wherein the first radial force is always less than 80% of the second radial force, so that the processed steel wire in the copper-clad steel continuous casting production line as a whole basically moves along the continuous casting direction in a step-by-step manner synchronized with the step-by-step pulling. The solution provided by the present disclosure helps to alleviate or even eliminate the risk of the steel wire being easily broken or cracked, and improves the production yield and efficiency of the copper-clad steel continuous casting.

Description

Technical Field

[0001] The present 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 a steel wire conveying device for the copper-clad steel continuous casting production line, which are specifically used to drive the steel wire to convey the steel wire and pull the copper-clad steel billet out of the continuous casting furnace. Background Art

[0002] In the process of producing various steel products, there are two methods to use liquid metal solidification, namely traditional die casting and continuous casting. Among them, the principle of continuous casting is: molten metal is continuously poured into the crystallizer, and then continuously pulled out from the other end of the crystallizer, which can obtain materials of any length or specific length.

[0003] Taking copper-clad steel material (also known as copper-clad 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 the high strength, excellent elasticity, large thermal resistance and high magnetic conductivity of steel, as well as the good electrical conductivity and excellent corrosion resistance of copper. It is widely used in electrical and electronic fields.

[0004] In the production process of copper-clad steel materials, a driving device or a traction device is set at the outlet end of the continuous casting furnace, and the copper-clad steel is pulled out of the continuous casting furnace by the driving device. The driving power required by the driving device is large, and there is a risk that the steel wire is easily broken or cracked, which may lead to a low yield rate and thus drag down production efficiency. In addition, in the process of pulling out the steel wire from the continuous casting furnace, there are cases where the pulling out fails, which also affects production efficiency. Therefore, it is necessary to solve the problem of pulling out the copper-clad steel from the continuous casting furnace and conveying the raw material steel wire forward.

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

[0006] One purpose of the present disclosure is to alleviate or eliminate the above-mentioned defects of the existing copper-clad steel continuous casting production technology and production line, and to propose a copper-clad steel continuous casting production line and a steel wire conveying method and steel wire conveying device for the copper-clad steel continuous casting production line.

[0007] The present disclosure provides a steel wire conveying method 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 a front end pushing mechanism is arranged in front of the inlet end of the continuous casting furnace, a rear end pulling mechanism is arranged behind the outlet end of the continuous casting furnace, and the method comprises the following steps which are continuously performed during the continuous casting production:

[0008] Controlling the front end pushing mechanism to continuously pull the processed steel wire to move along the continuous casting direction in a manner of applying a first radial force to the processed steel wire;

[0009] Controlling the rear end pulling mechanism to apply a second radial force to the processed steel wire coated with the copper layer to pull the processed steel wire in a stepwise manner and move it along the continuous casting direction;

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

[0011] In this article, "continuous traction" means that the driving force of the front-end pushing mechanism is continuously output, and the driving force is used to transmit the longitudinal (length direction) traction force of the processed steel wire via the first radial force; and "step-by-step traction" means that the driving force of the front-end pushing mechanism is output in a step-by-step manner or is periodically intermittently output, and the driving force is used to transmit the longitudinal traction force (longitudinal direction, i.e., the length direction of the steel wire) of the processed steel wire via the second radial force. In addition, the expression "front-end pushing mechanism" in this article is intended to facilitate the understanding that it is located in front of the continuous casting furnace and is used to push / drive the steel wire into the continuous casting furnace, and the expression "rear-end pulling mechanism" is intended to facilitate the understanding that it is located behind the continuous casting furnace and is used to pull the steel wire to pull the steel wire out of the furnace. These two expressions are not used to indicate that the two only apply thrust or only apply pulling force. The "front-end pushing mechanism" and the "rear-end pulling 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 the continuous casting process of copper-clad steel (such as horizontal continuous casting) is developed from the continuous casting process of a single metal such as copper and is used in the continuous casting production of copper-clad steel. In the single metal continuous casting process, a step-by-step drive device is used to pull the metal billet out of the continuous casting furnace. Compared with the continuous casting process of copper-clad steel, it is not necessary to consider the feeding link and its power supply (which can be roughly understood as not needing to drive the processed steel wire into the continuous casting furnace in front of the furnace), and the step-by-step drive device used to pull out the billet can even be equipped with the functions of pulling, stopping, and withdrawing the billet. The continuous casting process of copper-clad steel is developed from the single metal continuous casting process. The important difference between it and the single metal continuous casting is that it is necessary to consider the feeding action of guiding / driving the processed steel wire into the continuous casting furnace and the billet pulling action after the furnace. The continuous casting process of copper-clad steel usually still uses the step-by-step system of pulling out the billet after the furnace. This step-by-step system provides the time required for the copper coating layer in the continuous casting furnace to solidify and performs the pull / stop cycle of the metal billet. Therefore, a stepping drive device such as a stepping motor is very suitable to be the active driving power source and realize the pulling out of the copper-clad steel billet in a stepping manner after the furnace. At the same time, since the front section of the continuous casting furnace and / or the back section of the continuous casting furnace in the copper-clad steel continuous casting production line may need to drive the steel to move forward continuously (for example, the unwinding and straightening in the front process may require continuous power output to ensure the processing effect of its own link), there must be a certain degree of inconsistency in the upstream and downstream power systems in the production line.

[0013] However, in the practice of copper-clad steel continuous casting production, it is often found that although the aforementioned stepping power system provides the time required for the copper coating to solidify and obtains copper-clad steel products with better performance, the copper-clad steel wire obtained through a series of processes and manufactured downstream of the continuous casting furnace has a certain probability or proportion of copper-clad steel wire being broken, cracked, or slightly or even significantly infiltrated with copper (i.e., copper material infiltrates into the wire core formed by the steel wire). Since the entire processing process involves many factors, and the characteristics of the continuous casting production line itself cannot allow the machine to be stopped for inspection as soon as some problems are found, and the crystallization process in the continuous casting process cannot be monitored in real time from the outside due to the ultra-high temperature environment in the furnace, it is difficult to judge the causes and factors of the above defects and their impact.

[0014] The steel wire conveying method and device of each embodiment proposed in the present disclosure are generally based on the experience of metal continuous casting process technology and its implementation, production line and production practice, and the following profound insights drawn therefrom.

[0015] Although the characteristics and quality of the raw material of the unprocessed steel wire in the initial state, the process and parameters of each processing step of the metal continuous casting process, and the process parameters of the continuous casting furnace such as temperature control may cause the aforementioned copper-clad steel wire to break, crack or copper infiltration defects, the steel wire's ability to resist tensile stress under high temperature conditions becomes weaker and cannot well withstand, for example, the net tensile force applied to the steel wire during the stepper motor's pull / stop cycle (i.e., the tensile force applied by the stepper motor is superimposed on the undesirable resistance applied to the steel wire by the furnace front motor), the inconsistency of the front and rear power and the characteristics of the step-type tensile force output by the furnace rear drive device or the furnace rear pull-out mechanism will cause the steel wire to be subjected to a relatively large tension (or tensile stress) at the moment of pulling, which is one of the key factors for the phenomenon of the steel wire being broken, cracked, and copper infiltration (a large amount of copper infiltrates the steel material) caused by the cracking. Therefore, in the continuous casting process of copper-clad steel, by properly matching the furnace front driving force and the driving mode of applying the tensile force behind the furnace, the tension or stress on the steel in the furnace can be relieved.

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

[0017] According to some embodiments of the present disclosure, the first radial force is always maintained within a 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 processed steel wire to pass through is provided between the first rotating wheel and the second rotating wheel, and the first driver is used to drive at least one of the first rotating wheel and the second rotating wheel to rotate;

[0019] The rear end pulling mechanism comprises a step-by-step second driver and a second transmission assembly, the second transmission assembly comprises a third rotating wheel and a fourth rotating wheel, a second channel section for the processed steel wire to pass through is arranged between the third rotating wheel and the fourth rotating wheel, and the second driver is used to drive at least one of the third rotating wheel and the fourth rotating wheel to rotate;

[0020] Among them, the first rotating wheel and the second rotating wheel are constructed to apply a first radial force to the processed steel wire relative to each other to generate a first friction force acting on the processed steel wire, and the third rotating wheel and the fourth rotating wheel are constructed to apply a second radial force to the processed steel wire relative to each other to generate a second friction force acting on the processed steel wire.

[0021] Among them, the arrangement of a first channel section and a second transmission assembly similar thereto is arranged between the first wheel and the second wheel, which can be understood as a plurality of wheels of the transmission assembly being distributed on both sides of the travel path of the processed steel wire, thereby defining the dimension of the first channel section in the radial direction perpendicular to the axial direction of the processed steel wire (i.e. perpendicular to the travel path direction). For example, for horizontal continuous casting, an optional design of the transmission assembly is that a plurality of wheels define the radial dimension of the first channel section in the vertical direction, and the radial dimension is roughly consistent with the radial dimension of the processed steel wire passing through the position of the channel section in the production line, and the processed steel wire may differ in size and surface properties such as surface hardness due to the processing procedures it undergoes.

[0022] According to some embodiments of the present disclosure, the output frequency of the second stepping drive is in the range of 60-130 cycles / minute, each cycle is an output cycle including an output time and a pause time, the pause time is in the range of 0.3-0.8 seconds, the output time is in the range of 0.08-0.25 seconds, and the processed steel wire is driven to travel at an overall travel speed in the range of 30-50 cm / minute. Preferably, the output frequency of the second stepping drive 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 processed steel wire is driven to travel at an overall travel speed in the range of 30-50 cm / minute.

[0023] According to some embodiments of the present disclosure, the copper-clad steel wire produced by the copper-clad steel continuous casting production line has a copper cladding layer having a first cladding thickness, and the first transmission assembly and the second transmission assembly are constructed so that the difference between the second channel diameter defined by the third rotor and the fourth rotor at the second channel section and the first channel diameter defined by the first rotor and the second rotor at the first channel section is slightly less than twice the first cladding thickness.

[0024] As a result, the wheels of the traction assembly behind the furnace (i.e., the continuous casting furnace) hold the steel wire more tightly than those in front of the furnace, so that the wheel group behind the furnace does not slip, while the wheel group in front of the furnace can slip. In this article, the expressions "slightly greater than" and "slightly less than" generally mean that the difference is less than 1 / 10 of the latter, preferably less than 1 / 20 of the latter.

[0025] According to some embodiments of the present disclosure, the first transmission assembly further includes a flexible force-applying component, the first rotating wheel and the second rotating wheel are basically fixed so that the first channel diameter of the first channel section is equal to or slightly larger than the diameter of the processed steel wire, the basically fixed is defined as having a movable amount only in the direction of the line connecting the first rotating wheel and the second rotating wheel or only in the radial direction of the first channel section, the flexible force-applying component and at least one of the first rotating wheel and the second rotating wheel are connected, thereby applying a variable force tending to cause one of the two to approach the other, and the variable force becomes smaller as the first rotating wheel and the second rotating wheel approach each other.

[0026] In this way, it is ensured that the first radial force and the first friction force generated thereby are not too small to lose the traction effect in front of the furnace, while at the same time it is ensured that the force is not too large and there is always necessary slipping ability to provide buffering during the steel wire transportation process, and the vibration of the steel wire caused by the asynchrony of the traction force in front of and behind the furnace is also alleviated to a certain extent, for example, the maximum amplitude of the vibration is limited to a certain extent.

[0027] According to some embodiments of the present disclosure, the second transmission assembly also includes a rigid force-applying component, the third wheel and the fourth wheel are basically fixed so that the second channel diameter of the second channel section is equal to or slightly larger than the diameter of the processed steel wire, and the rigid force-applying component and at least one of the third wheel and the fourth wheel are connected to apply a constant force tending to urge one of the two to approach the other.

[0028] Among them, a better implementation method of the "rigid force-applying component" is to use a hydraulic device, which can hydraulically keep the force applied by the third and fourth wheels to the processed steel wire at a constant value at all times. This constant value ensures the accurate implementation of the step-by-step pull / stop cycle.

[0029] According to some embodiments of the present disclosure, a material opening 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 material opening 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 the rear end pulling mechanism are sequentially arranged downstream of the continuous casting furnace.

[0031] The present disclosure also provides a steel wire conveying device for a copper-clad steel continuous casting production line, wherein the copper-clad steel continuous casting production line includes a continuous casting furnace with a crystallizer assembly, wherein the steel wire conveying device includes:

[0032] A front end pushing mechanism, which is arranged in front of the inlet end of the continuous casting furnace and is configured to continuously pull the processed steel wire to move along the continuous casting direction in a manner of applying a first radial force to the processed steel wire;

[0033] A rear end pull-out mechanism, which is arranged behind the outlet end of the continuous casting furnace and is configured to pull the processed steel wire in a stepwise manner to move along the continuous casting direction by applying a second radial force to the processed steel wire coated with the copper layer;

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

[0035] According to some embodiments of the present disclosure, the front end pushing mechanism and the rear end pulling mechanism are configured such that the first radial force is always maintained within a 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 processed steel wire to pass through is provided between the first rotating wheel and the second rotating wheel, and the first driver is used to drive at least one of the first rotating wheel and the second rotating wheel to rotate;

[0037] The rear end pulling mechanism comprises a step-by-step second driver and a second transmission assembly, the second transmission assembly comprises a third rotating wheel and a fourth rotating wheel, a second channel section for the processed steel wire to pass through is arranged between the third rotating wheel and the fourth rotating wheel, and the second driver is used to drive at least one of the third rotating wheel and the fourth rotating wheel to rotate;

[0038] Among them, the first rotating wheel and the second rotating wheel are constructed to apply a first radial force to the processed steel wire relative to each other to generate a first friction force acting on the processed steel wire, and the third rotating wheel and the fourth rotating wheel are constructed to apply a second radial force to the processed steel wire relative to each other to generate a second friction force acting on the processed steel wire, wherein the first friction force is always maintained within the range of 5% to 60% of the second friction force.

[0039] According to some embodiments of the present disclosure, the output frequency of the second stepping drive is in the range of 60-130 cycles / minute, each cycle is an output cycle including an output time and a pause time, the pause time is in the range of 0.3-0.8 seconds, the output time is in the range of 0.08-0.25 seconds, and the processed steel wire is driven to travel at an overall travel speed in the range of 30-50 cm / minute. Preferably, the output frequency of the second stepping drive 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 processed steel wire is driven to travel at an overall travel speed in the range of 30-50 cm / minute.

[0040] According to some embodiments of the present disclosure, the copper-clad steel wire produced by the copper-clad steel continuous casting production line has a copper cladding layer having a first cladding thickness, and the first transmission assembly and the second transmission assembly are constructed so that the difference between the second channel diameter defined by the third rotor and the fourth rotor at the second channel section and the first channel diameter defined by the first rotor and the second rotor at the first channel section is slightly less than twice the first cladding thickness.

[0041] According to some embodiments of the present disclosure, the first transmission assembly further includes a flexible force-applying component, the first rotating wheel and the second rotating wheel are basically fixed so that the first channel diameter of the first channel section is equal to or slightly larger than the diameter of the processed steel wire, the basically fixed is defined as having a movable amount only in the direction of the line connecting the first rotating wheel and the second rotating wheel or only in the radial direction of the first channel section, the flexible force-applying component and at least one of the first rotating wheel and the second rotating wheel are connected, thereby applying a variable force tending to cause one of the two to approach the other, and the variable force becomes smaller as the first rotating wheel and the second rotating wheel approach each other.

[0042] According to some embodiments of the present disclosure, the flexible force-applying component is a compression spring arranged along the direction of the line connecting the first wheel and the second wheel or only in the radial direction of the first channel section, one end of the compression spring is connected to the first wheel or the second wheel, 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.

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

[0044] The present disclosure also provides a copper-clad steel continuous casting production line, comprising:

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

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

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

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

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

[0050] And wherein, the fourth radial force is not less than 1.5 times of the first radial force, and the third radial force is greater than the first radial force and less than the fourth radial force.

[0051] On the basis of being in accordance with the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present disclosure.

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

[0053] The copper-clad steel continuous casting production line and the steel wire conveying method and steel wire conveying device used in the copper-clad steel continuous casting production line according to the contents of the present disclosure can at least to a certain extent help alleviate or even eliminate the risk of the steel wire being easily broken or cracked, thereby improving the production yield and production efficiency of the copper-clad steel continuous casting. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 The overall schematic diagram of a copper-clad steel production line is schematically shown, and the copper-clad steel continuous casting production line includes a steel wire conveying device according to a preferred embodiment of the present disclosure.

[0055] Description of reference numerals:

[0056] 1. Front end driving mechanism; 11. First rotating wheel; 12. Second rotating wheel;

[0057] 2. Rear end pull-out mechanism; 21. Third rotating wheel; 22. Fourth rotating wheel;

[0058] 3. Continuous casting furnace; 4. Cutting mechanism; 5. Straightening mechanism; 6. Polishing mechanism; 7. Cooling device; 8. Processed steel wire;

[0059] 1', unwinding drive mechanism; 1", straightening drive mechanism DETAILED DESCRIPTION

[0060] The preferred embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings of the specification. The following description is exemplary and not limiting of the present invention. Any other similar situations also fall within the protection scope of the present invention.

[0061] In the following detailed description, directional terms, such as "left", "right", "up", "down", "front", "rear", etc., are used with reference to the directions described in the drawings. The components of the embodiments of the present invention can be placed in a variety of different directions, and the directional terms are used for illustrative purposes rather than limiting.

[0062] refer to Figure 1 As shown, a steel wire conveying device according to a preferred embodiment of the present 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.

[0063] Specifically, the steel wire conveying device comprises:

[0064] A front end pushing mechanism 1, which is arranged in front of the inlet end of the continuous casting furnace 3 and is configured to continuously pull the processed steel wire 8 to move along the continuous casting direction in a manner of applying a first radial force to the processed steel wire 8;

[0065] A rear end pull-out mechanism 2, which is arranged behind the outlet end of the continuous casting furnace 3 and is configured to stepwise pull the processed steel wire 8 along the continuous casting direction by applying a second radial force to the processed steel wire 8 coated with the copper layer;

[0066] The first radial force is always less than 80% of the second radial force, so that the processed steel wire 8 in the copper-clad steel continuous casting production line moves as a whole along the continuous casting direction in a step-by-step manner synchronized with the step-by-step traction.

[0067] According to some preferred embodiments of the present disclosure, the front end pushing mechanism 1 and the rear end pulling mechanism 2 are constructed so that the first radial force is always maintained in the range of 5% to 60% of the second radial force or optionally maintained in the range of 10% to 40% of the second radial force.

[0068] 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 for the processed steel wire 8 to pass through is provided between the first rotating wheel 11 and the second rotating wheel 12, and the first driver is used to drive at least one of the first rotating wheel 11 and the second rotating wheel 12 to rotate;

[0069] The rear end pulling mechanism 2 includes a step-by-step 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 for the processed steel wire 8 to pass through is provided between the third rotating wheel 21 and the fourth rotating wheel 22, and the second driver is used to drive at least one of the third rotating wheel 21 and the fourth rotating wheel 22 to rotate;

[0070] Among them, the first rotating wheel 11 and the second rotating wheel 12 are constructed to apply a first radial force to the processed steel wire 8 relative to each other to generate a first friction force acting on the processed steel wire 8, and the third rotating wheel 21 and the fourth rotating wheel 22 are constructed to apply a second radial force to the processed steel wire 8 relative to each other to generate a second friction force acting on the processed steel wire 8, wherein the first friction force is always maintained in the range of 5% to 60% of the second friction force or optionally maintained in the range of 10% to 40% of the second friction force.

[0071] In some specific examples, the wheels are configured with grooves, and accordingly, the spaces between the grooves of the corresponding wheels define passage sections for the processed steel wire 8 to pass through so as to press out the steel wire.

[0072] According to some preferred embodiments of the present disclosure, the output frequency of the step-by-step second drive is in the range of 60-130 cycles / minute, each cycle is an output period including an output time and a pause time, the pause time is in the range of 0.3-0.8 seconds, the output time is in the range of 0.08-0.25 seconds, and the processed steel wire is driven to travel at an overall travel speed in the range of 30-50 cm / minute.

[0073] According to a further preferred embodiment of the present disclosure, the output frequency of the second stepper drive is in the range of 80-110 cycles / minute, the dwell 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 processed steel wire is driven to travel at an overall travel speed in the range of 30-50 cm / minute.

[0074] Among them, further preferably, according to a specific embodiment that has been repeatedly adjusted and tested, the output frequency of the step-type second drive 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 processed steel wire is driven to travel at an overall travel speed in the range of 30-50 cm / minute. According to this specific embodiment, the pause time of about 0.5 seconds in the pull-stop cycle is used for crystallization so that the copper coating can be more firmly covered on the surface of the steel wire, and the time of about 0.1 seconds is used for stepping to drive the steel wire forward. There are nearly 100 pull-stop cycles per minute. Based on the overall travel speed of 30-50 cm / minute, it can be obtained that in each cycle, if the stepping motor and the continuous motor do not slip, there will be a stroke difference of about 0.2-0.5 cm or a linear speed difference of the motor output, which may cause the steel wire to vibrate or cause the steel wire to be under stress. The slipping setting described in detail below in this article provides further buffering to alleviate the phenomenon of stress on the steel wire caused by the step-by-step pull-stop cycle.

[0075] According to some preferred embodiments of the present disclosure, the copper-clad steel wire produced by the copper-clad steel continuous casting production line has a copper cladding layer having a first cladding thickness, and the first transmission assembly and the second transmission assembly are constructed so that the difference between the second channel diameter defined by the third rotor 21 and the fourth rotor 22 at the second channel section and the first channel diameter defined by the first rotor 11 and the second rotor 12 at the first channel section is slightly less than twice the first cladding thickness.

[0076] According to some preferred embodiments of the present disclosure, the first transmission assembly further includes a flexible force-applying component, the first rotating wheel 11 and the second rotating wheel 12 are basically fixed so that the first channel diameter of the first channel section is equal to or slightly larger than the diameter of the processed steel wire 8, and the basically fixed is defined as having a movable amount only along the line direction between the first rotating wheel 11 and the second rotating wheel 12, and the flexible force-applying component is connected to at least one of the first rotating wheel 11 and the second rotating wheel 12, so as to apply a variable force tending to cause one of the two to approach the other, and the variable force becomes smaller as the first rotating wheel and the second rotating wheel approach each other.

[0077] According to some embodiments of the present disclosure, the flexible force-applying component may specifically be an elastic member, and more preferably, a compression spring is specifically adopted which is arranged along the connecting direction of 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.

[0078] Still reference Figure 1As shown, 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.

[0079] The front-end pushing mechanism 1 is upstream of the continuous casting furnace 3, that is, the front-end pushing mechanism 1 is arranged before the inlet end of the continuous casting furnace 3; the rear-end pulling mechanism 2 is downstream of the continuous casting furnace 3, that is, the rear-end pulling mechanism 2 is arranged after the outlet end of the continuous casting furnace 3. It should be noted that the inlet and outlet of the continuous casting furnace 3 of the embodiment of the present invention are collinear in the horizontal direction, the continuous casting furnace 3 is used to contain molten copper, the continuous casting furnace 3 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 in the continuous casting furnace 3 to form a processed steel wire 8, which can also be understood as a copper-clad steel wire.

[0080] With the continuous casting furnace 3 as the boundary, the front-end pushing mechanism 1 applies a preset thrust to the portion of the processed steel wire 8 before the inlet end of the continuous casting furnace 3, and the rear-end pulling mechanism 2 applies a preset tension to the portion of the processed steel wire 8 after the outlet end of the continuous casting furnace 3, and the entire processed 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 processed steel wire 8 is smoothly pulled out of the continuous casting furnace 3. The external force acting on the processed steel wire 8 is divided into two parts and applied to different parts of the processed steel wire 8 by the front-end pushing mechanism 1 and the rear-end pulling mechanism 2, so that the horizontal force of the processed steel wire 8 is more uniform, avoiding the problem of excessive tensile stress of the processed steel wire 8 at the outlet end of the continuous casting furnace 3, solving the problem that the processed steel wire 8 is easily broken by the tension at the outlet end of the continuous casting furnace 3, and ensuring that the processed steel wire 8 moves stably in the horizontal direction.

[0081] Moreover, at the beginning of production, under the dual action of the front-end pushing mechanism 1 and the rear-end pulling mechanism 2, combined with the ingot guide rod, the processed steel wire 8 can be stably pulled out, which greatly improves the success rate of pulling out, can solve the problem of unsuccessful pulling out of the processed steel wire 8 at the beginning of production, saves the debugging time for the first pulling out, and improves production efficiency.

[0082] At the beginning of production, the front-end pushing mechanism 1 is used to pull the processed steel wire 8 along the continuous casting direction to enter the inlet end of the continuous casting furnace 3 and move from the inlet end to the outlet end of the continuous casting furnace 3 until the dummy rod at the outlet end of the continuous casting furnace 3 plays a pulling role. After the processed steel wire 8 starts to be led out from the outlet end of the continuous casting furnace 3 to the traction wheel, the rear-end pulling mechanism 2 provides pulling force to the processed steel wire 8.

[0083] It should be noted that the preset pulling force and the preset thrust have the same direction, both extending in the horizontal direction. The preset thrust can be understood as pulling the processed steel wire toward the continuous casting furnace 3 and moving it along the continuous casting direction. The preset pulling force can be understood as pulling the processed steel wire 8 out of the continuous casting furnace 3.

[0084] Some method embodiments of the present disclosure also provide a steel wire conveying method for a copper-clad steel continuous casting production line, which generally has the same or similar features as the steel wire conveying device of some preferred embodiments described above. The steel wire conveying method includes the following steps that are continuously performed during the continuous casting production:

[0085] Control the front end pushing mechanism 1 to continuously pull the processed steel wire 8 to move along the continuous casting direction in a manner of applying a first radial force to the processed steel wire 8;

[0086] Control the rear end pulling mechanism 2 to apply a second radial force to the processed steel wire 8 coated with the copper layer and pull the processed steel wire 8 to move along the continuous casting direction in a step-by-step manner;

[0087] The first radial force is always less than 80% of the second radial force, so that the processed steel wire 8 in the copper-clad steel continuous casting production line moves as a whole along the continuous casting direction in a step-by-step manner synchronized with the step-by-step traction.

[0088] According to some preferred embodiments of the present disclosure, the first transmission assembly further includes a flexible force-applying component (such as an elastic member or a coil spring), the first rotating wheel 11 and the second rotating wheel 12 are basically fixed so that the first channel diameter of the first channel section is equal to or slightly larger than the diameter of the processed steel wire 8, and the basically fixed is defined as having a movable amount only along the line direction between the first rotating wheel 11 and the second rotating wheel 12, and the flexible force-applying component is connected to at least one of the first rotating wheel 11 and the second rotating wheel 12, so as to apply a variable force (such as an elastic force) tending to cause one of the two to approach the other, and the variable force decreases as the first rotating wheel and the second rotating wheel approach each other.

[0089] Thus, it is ensured that the first radial force and the first friction force generated thereby will not be too small to lose the traction effect in front of the furnace, and at the same time it is ensured that the force will not be too large and there is always the necessary slipping ability to provide buffering during the steel wire transportation process, and the vibration of the steel wire caused by the asynchrony of the traction force in front of the furnace and behind the furnace is also alleviated to a certain extent, for example, the maximum amplitude of the vibration is limited to a certain extent. In addition, 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 upstream of the continuous casting furnace has the necessary slipping ability (for example, achieved by a wheel group that can slip to a certain extent) to eliminate the power inconsistency problem at different locations on the production line, and the aforementioned steel wire vibration within a certain vibration amplitude or range is a design of the copper-clad steel continuous casting production line based on overall benefit considerations, because such steel wire vibration will in fact not have an adverse effect on the production quality of the copper-clad steel continuous casting production line due to the aforementioned buffer, and thus the respective requirements of the continuous casting furnace billet pulling link and the front-end unwinding / straightening link of the production line are taken into account.

[0090] According to some embodiments of the present disclosure, the second transmission assembly also includes a rigid force-applying component, the third wheel and the fourth wheel are basically fixed so that the second channel diameter of the second channel section is equal to or slightly larger than the diameter of the processed steel wire, and the rigid force-applying component and at least one of the third wheel and the fourth wheel are connected to apply a constant force tending to urge one of the two to approach the other.

[0091] Among them, the coordinated use of the "rigid force-applying component" and the "flexible force-applying component" of the aforementioned embodiment is better, wherein the "rigid force-applying component" can adopt a hydraulic device, which can hydraulically keep the force applied by the third and fourth wheels to the processed steel wire at a constant value at all times, and this constant value ensures the accurate implementation of the step-by-step pull / stop cycle.

[0092] In a specific application example, the preset tension step-by-step output method can be selected as follows: controlling the preset tension to maintain a preset time, or controlling the preset tension to drive the processed steel wire 8 to travel a preset length.

[0093] Controlling the preset tension to maintain the preset time can be understood as maintaining the state of providing the preset tension for the preset time by the rear pull-out mechanism 2. The rear pull-out mechanism 2 provides the preset tension to the processed steel wire 8 for the preset time, then stops providing the preset tension, and provides the preset tension again for the preset time after the preset time interval. The state of the rear pull-out mechanism 2 is controlled by timing, and the control method is simple.

[0094] Controlling the steel wire 8 to travel a preset length by a preset pulling force can be understood as controlling the rear end pull-out mechanism 2 to stop providing driving force when the steel wire 8 travels a preset length. The steel wire 8 can travel a preset length by detecting the travel length of the steel wire 8; or, when the rear end pull-out mechanism 2 is provided with a third rotating wheel 21 and a fourth rotating wheel 22, the travel length of the 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 end pull-out mechanism 2 is provided with a stepping motor, and the steel wire is controlled to travel a preset length by the stepping motor.

[0095] In some embodiments, the preset pulling force is greater than the preset pushing force, and the driving force provided by the rear-end pulling mechanism 2 is greater than the driving force provided by the front-end pushing mechanism 1, so that the processed steel wire 8 mainly bears the preset pulling force of the rear-end pulling mechanism 2, and the preset pushing force of the front-end pushing mechanism 1 (which can provide necessary slippage) plays an auxiliary pushing role.

[0096] In some other embodiments, reference Figure 1As shown, 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 processed steel wire 8 to pass through is arranged between the first rotating wheel 11 and the second rotating wheel 12, the first driver is used to drive at least one of the first rotating wheel 11 and the second rotating wheel 12 to rotate, and the first driver is used to control the preset thrust output.

[0097] The first driver can 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, and through the surface friction between at least one of the first rotating wheel 11 and the second rotating wheel 12 and the processed steel wire 8, the processed steel wire is pulled to move along the continuous casting direction 8. One of the first rotating wheel 11 and the second rotating wheel 12 provides a driving force, and the other assists in limiting; or, both the first rotating wheel 11 and the second rotating wheel 12 are used to pull the processed steel wire to move along the continuous casting direction 8. Among them, the first channel section in the first rotating wheel 11 and the second rotating wheel 12 can be used to guide, pull and limit the processed steel wire 8, and pull the processed steel wire to move along the continuous casting direction 8 along the set path.

[0098] For example, the first rotating wheel 11 and the second rotating wheel 12 can be arranged side by side up and down, or not aligned along the vertical axis but still arranged in pairs. Of course, the number of the first rotating wheel 11 and the second rotating wheel 12 can be the same or different, as long as they can provide the above-mentioned appropriate functions of guiding, pulling and limiting the processed steel wire 8 and exert appropriate force on the steel wire. The possible arrangement of the third rotating wheel 21 and the fourth rotating wheel 22 is similar to that of the first rotating wheel 11 and the second rotating wheel 12, so it will not be repeated here.

[0099] For example, typical examples of drivers are relatively cheaper continuous motors and stepper motors. The second driver can also be, but is not limited to, a motor. When the rear end pull-out mechanism 2 drives the processed steel wire 8 in a step-by-step manner, the second driver can select a stepper motor. The second driver is used to drive at least one of the third rotating wheel 21 and the fourth rotating wheel 22 to rotate, and through the surface friction between at least one of the third rotating wheel 21 and the fourth rotating wheel 22 and the processed steel wire 8, the processed steel wire is pulled to move along the continuous casting direction 8. The processed steel wire 8 passes through the second channel section between the third rotating wheel 21 and the fourth rotating wheel 22, and is pulled to move along the continuous casting direction 8 by rotating at least one of the third rotating wheel 21 and the fourth rotating wheel 22.

[0100] The first driver continuously outputs the first rotational driving force, which can be understood as the first driver outputs the first torque, which is a constant value; the second driver outputs the second rotational driving force in steps, the second driver outputs the second torque, which is a constant value.

[0101] In some other embodiments, in the step of controlling the second driver to output the second rotational driving force stepwise, the second rotational driving force is controlled to maintain a preset time length, or the second rotational driving force is controlled to drive the processed steel wire 8 to travel a preset length.

[0102] The step-by-step operation or driving control method of the rear end pulling mechanism 2 can be, for example, controlling the step-by-step movement of the second driver, and the control method of the second driver can be: through timing control; when the second driver is a motor, the number of turns of the second driver can be recorded; and the control is performed by detecting the travel length of the processed steel wire 8. The method of detecting the travel length of the processed steel wire 8 can be through marking recording, through travel speed recording, etc.

[0103] In some other embodiments, reference Figure 1 As shown, a cutting mechanism 4 (uncoiler mechanism), a straightening mechanism 5 and a polishing mechanism 6 are sequentially arranged upstream of the continuous casting furnace 3. Before the processed steel wire 8 enters the continuous casting furnace 3, the processed steel wire 8 is cut, straightened and polished to ensure that the processed steel wire 8 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.

[0104] A front-end drive mechanism may be optionally arranged between the cutting mechanism 4, the straightening mechanism 5 and the polishing mechanism 6. The position and quantity of the front-end drive mechanism can be flexibly set, and its own structure can be similar to the front-end push mechanism arranged in front of the furnace, but it does not provide the aforementioned slip and buffer area, which means that in the case of a front-end drive mechanism of a continuous output type, the corresponding mechanisms such as the cutting mechanism 4 and the straightening mechanism 5 will work or process continuously, during which the steel wire is also driven to move continuously.

[0105] The front-end drive mechanism can be set, for example, between two adjacent components, such as between the cutting mechanism 4 and the straightening mechanism 5, and between the straightening mechanism 5 and the polishing mechanism 6. The front-end drive mechanism can be set at one or more of the aforementioned positions, and the setting position of the front-end drive mechanism has a certain flexibility, and the selection of its setting position can be aimed at ensuring that the processed steel wire 8 moves stably between two adjacent components.

[0106] When a front-end driving mechanism is provided between the opening mechanism 4 and the straightening mechanism 5, and between the straightening mechanism 5 and the polishing mechanism 6, a total of three driving mechanisms including the front-end pushing mechanism 1 and the front-end driving mechanism can be provided upstream of the continuous casting furnace in the continuous casting production line, and one rear-end pulling mechanism 2 is provided. These three driving mechanisms can pull the processed steel wire toward the continuous casting furnace 3 and move it along the continuous casting direction 8. A rear-end pulling mechanism 2 pulls out the processed steel wire 8 from the continuous casting furnace 3, and drives the processed steel wire 8 to move in a three-push and one-pull manner, and can also drive the processed steel wire 8 to stably move between two adjacent processes / components in front of the furnace, thereby maintaining the moving stability and ensuring the processing accuracy of processes such as opening (uncoiling), straightening, and polishing.

[0107] The current driving mechanism may include a first transmission component, which can guide and limit the processed steel wire 8. In the processes of cutting, straightening, polishing, etc., the processed steel wire 8 can be accurately positioned, which helps to improve the processing accuracy.

[0108] In some other embodiments, a cooling device 7 and a rear-end pull-out mechanism 2 are sequentially arranged downstream of the continuous casting furnace 3. The rear-end pull-out mechanism 2 is arranged downstream of the cooling device 7. After the processed steel wire 8 is coated with the copper layer, it is first cooled by the cooling device 7. The preset tension of the rear-end pull-out mechanism 2 is applied to the cooled processed steel wire 8. The structural stability of the cooled processed steel wire 8 is better, and the structural influence of the rear-end pull-out mechanism 2 on the processed steel wire 8 is reduced. The rear-end pull-out mechanism 2 is adjacent to the cooling device 7, shortening the distance between the rear-end pull-out mechanism 2 and the continuous casting furnace 3, ensuring that the preset tension can stably pull out the processed steel wire 8 in the continuous casting furnace 3, and the position of the rear-end pull-out mechanism 2 is reasonable, and the force on the processed steel wire 8 is reasonable.

[0109] The structures of the above-mentioned opening mechanism 4, straightening mechanism 5, polishing mechanism 6, continuous casting furnace 3, and cooling device 7 are not limited, and any components that can meet the requirements of horizontal continuous casting of copper-clad steel are sufficient. It should be noted that the opening mechanism 4, straightening mechanism 5, and polishing mechanism 6 need to be used in conjunction with the front-end driving mechanism.

[0110] According to a further preferred embodiment, the traction assembly or unwinding drive mechanism 1' provided in cooperation with the opening mechanism 4, the traction assembly or straightening drive mechanism 1" provided in cooperation with the straightening mechanism 5, and the front-end pushing mechanism 1 located upstream of the continuous casting furnace 3 described in detail above can adopt a substantially similar structure to drive the steel wire to advance, but the specific configuration may be slightly different, especially in the radial force for clamping the processed steel wire and the further setting of the driving force. Among them, according to some preferred embodiments, the straightening drive mechanism 1" at the straightening mechanism 5 clamps the steel wire with a greater radial force without allowing it to slip, and the clamping force therein may be significantly greater than the unwinding drive mechanism 1' at the opening mechanism, and, for example, reach more than 2-3 times the first radial force of the front-end pushing mechanism 1 located upstream of the continuous casting furnace 3. Since there is a long distance between the straightening mechanism 5 and the continuous casting furnace, the aforementioned design of allowing the steel wire to slip of the front-end pushing mechanism 1 in front of the continuous casting furnace 3 between the straightening mechanism 5 and the rear end pulling mechanism 2 can play a sufficient buffering role, so that the vibrations that may occur to the steel wire in its upstream and downstream areas are within an acceptable range. In this way, the respective requirements of the continuous casting furnace billet pulling link and the front-end uncoiling / straightening link of the production line can be taken into account.

[0111] In other words, if Figure 1 Among the radial forces applied at various locations of the production line schematically shown in FIG, F4 and F2 are significantly greater than F1, while the radial force F3 can be designed according to the raw material of the uncoiled steel wire, and generally F3 is also smaller than F4 and F2.

[0112] The copper-clad steel continuous casting production line and the steel wire conveying method and steel wire conveying device used in the copper-clad steel continuous casting production line according to the contents of the present disclosure can at least to a certain extent help alleviate or even eliminate the risk of the steel wire being easily broken or cracked, thereby improving the production yield and production efficiency of the copper-clad steel continuous casting.

[0113] Although the specific embodiments of the present invention are described above, those skilled in the art should understand that these are only examples, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A steel wire conveying method for a copper-clad steel continuous casting production line, wherein the copper-clad steel continuous casting production line comprises a continuous casting furnace with a crystallizer assembly, characterized in that: A front end pushing mechanism is arranged in front of the inlet end of the continuous casting furnace, and a rear end pulling mechanism is arranged behind the outlet end of the continuous casting furnace, and the following steps are continuously performed during the continuous casting production: Controlling the front end pushing mechanism to continuously pull the processed steel wire to move along the continuous casting direction in a manner of applying a first radial force to the processed steel wire; Controlling the rear end pulling mechanism to apply a second radial force to the processed steel wire coated with the copper layer to pull the processed steel wire in a stepwise manner and move it along the continuous casting direction; The first radial force is always less than 80% of the second radial force, so that the processed steel wire in the copper-clad steel continuous casting production line moves as a whole along the continuous casting direction in a step-by-step manner synchronized with the step-by-step 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 a 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 comprises a continuous first driver and a first transmission assembly, the first transmission assembly comprises a first rotating wheel and a second rotating wheel, a first channel section for the processed steel wire to pass through is arranged between the first rotating wheel and the second rotating wheel, and the first driver is used to drive at least one of the first rotating wheel and the second rotating wheel to rotate; The rear end pulling mechanism comprises a step-by-step second driver and a second transmission assembly, the second transmission assembly comprises a third rotating wheel and a fourth rotating wheel, a second channel section for the processed steel wire to pass through is arranged between the third rotating wheel and the fourth rotating wheel, and the second driver is used to drive at least one of the third rotating wheel and the fourth rotating wheel to rotate; Among them, the first rotating wheel and the second rotating wheel are constructed to apply a first radial force to the processed steel wire relative to each other to generate a first friction force acting on the processed steel wire, and the third rotating wheel and the fourth rotating wheel are constructed to apply a second radial force to the processed steel wire relative to each other to generate a second friction force acting on the processed steel wire.

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 step-type second drive is in the range of 60-130 cycles / minute, each cycle is an output period including an output time and a pause time, the pause time is in the range of 0.3-0.8 seconds, the output time is in the range of 0.08-0.25 seconds, and the processed steel wire 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 4, characterized in that: The output frequency of the second stepper drive is in the range of 80-110 cycles / minute, the dwell 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 processed steel wire is driven to travel at an overall travel speed in the range of 30-50 cm / minute.

6. 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 is used to produce a copper-clad steel wire whose copper clad layer has a first coating thickness, and the first transmission assembly and the second transmission assembly are constructed so that the difference between the second channel diameter defined by the third rotor and the fourth rotor at the second channel section and the first channel diameter defined by the first rotor and the second rotor at the first channel section is slightly less than twice the first coating thickness.

7. 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 also includes a flexible force-applying component. The first rotating wheel and the second rotating wheel are basically fixed so that the first channel diameter of the first channel section is equal to or slightly larger than the diameter of the processed steel wire. The basic fixation is defined as having a movable amount only in the direction of the line connecting the first rotating wheel and the second rotating wheel or only in the radial direction of the first channel section. The flexible force-applying component is connected to at least one of the first rotating wheel and the second rotating wheel, thereby applying a variable force tending to cause one of the two to approach the other, and the variable force becomes smaller as the first rotating wheel and the second rotating wheel approach each other.

8. The steel wire conveying method for a copper-clad steel continuous casting production line according to claim 7, characterized in that: The second transmission assembly also includes a rigid force-applying component, and the third and fourth wheels are basically fixed so that the second channel diameter of the second channel section is equal to or slightly larger than the diameter of the processed steel wire. The rigid force-applying component and at least one of the third and fourth wheels are connected to apply a constant force that tends to urge one of the two to approach the other.

9. A steel 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 comprises: A front end pushing mechanism, which is arranged in front of the inlet end of the continuous casting furnace and is configured to continuously pull the processed steel wire to move along the continuous casting direction in a manner of applying a first radial force to the processed steel wire; A rear end pull-out mechanism, which is arranged behind the outlet end of the continuous casting furnace and is configured to pull the processed steel wire in a stepwise manner to move along the continuous casting direction by applying a second radial force to the processed steel wire coated with the copper layer; The first radial force is always less than 80% of the second radial force, so that the processed steel wire in the copper-clad steel continuous casting production line moves as a whole along the continuous casting direction in a step-by-step manner synchronized with the step-by-step traction.

10. The steel wire conveying device for the copper-clad steel continuous casting production line according to claim 9, 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 a range of 5% to 60% of the second radial force.

11. The steel wire conveying device for a copper-clad steel continuous casting production line according to claim 9 or 10, characterized in that: The front end pushing mechanism comprises a continuous first driver and a first transmission assembly, the first transmission assembly comprises a first rotating wheel and a second rotating wheel, a first channel section for the processed steel wire to pass through is arranged between the first rotating wheel and the second rotating wheel, and the first driver is used to drive at least one of the first rotating wheel and the second rotating wheel to rotate; The rear end pulling mechanism comprises a step-by-step second driver and a second transmission assembly, the second transmission assembly comprises a third rotating wheel and a fourth rotating wheel, a second channel section for the processed steel wire to pass through is arranged between the third rotating wheel and the fourth rotating wheel, and the second driver is used to drive at least one of the third rotating wheel and the fourth rotating wheel to rotate; Among them, the first rotating wheel and the second rotating wheel are constructed to apply a first radial force to the processed steel wire relative to each other to generate a first friction force acting on the processed steel wire, and the third rotating wheel and the fourth rotating wheel are constructed to apply a second radial force to the processed steel wire relative to each other to generate a second friction force acting on the processed steel wire, wherein the first friction force is always maintained within the range of 5% to 60% of the second friction force.

12. The steel wire conveying device for a copper-clad steel continuous casting production line according to claim 9, characterized in that: The output frequency of the step-type second drive is in the range of 60-130 cycles / minute, each cycle is an output period including an output time and a pause time, the pause time is in the range of 0.3-0.8 seconds, the output time is in the range of 0.08-0.25 seconds, and the processed steel wire is driven to travel at an overall travel speed in the range of 30-50 cm / minute.

13. The steel wire conveying device for a copper-clad steel continuous casting production line according to claim 12, characterized in that: The output frequency of the second stepper drive is in the range of 80-110 cycles / minute, the dwell 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 processed steel wire is driven to travel at an overall travel speed in the range of 30-50 cm / minute.

14. The steel wire conveying device for a copper-clad steel continuous casting production line according to claim 11, characterized in that: The copper-clad steel continuous casting production line is used to produce a copper-clad steel wire whose copper clad layer has a first coating thickness, and the first transmission assembly and the second transmission assembly are constructed so that the difference between the second channel diameter defined by the third rotor and the fourth rotor at the second channel section and the first channel diameter defined by the first rotor and the second rotor at the first channel section is slightly less than twice the first coating thickness.

15. The steel wire conveying device for a copper-clad steel continuous casting production line according to claim 11, characterized in that: The first transmission assembly also includes a flexible force-applying component. The first rotating wheel and the second rotating wheel are basically fixed so that the first channel diameter of the first channel section is equal to or slightly larger than the diameter of the processed steel wire. The basic fixation is defined as having a movable amount only in the direction of the line connecting the first rotating wheel and the second rotating wheel or only in the radial direction of the first channel section. The flexible force-applying component is connected to at least one of the first rotating wheel and the second rotating wheel, thereby applying a variable force tending to cause one of the two to approach the other, and the variable force becomes smaller as the first rotating wheel and the second rotating wheel approach each other.

16. The steel wire conveying device for a copper-clad steel continuous casting production line according to claim 15, characterized in that: The flexible force-applying component is a compression spring arranged along the direction of the line connecting the first rotating wheel and the second rotating wheel or only in the radial direction of the first channel section. One end of the compression spring is connected to the first rotating wheel or the 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 compression amount of the compression spring.

17. The steel wire conveying device for a copper-clad steel continuous casting production line according to claim 15, characterized in that: The movable amount is not more than 1 / 10 of the diameter of the steel wire being processed.

18. The steel wire conveying device for a copper-clad steel continuous casting production line according to claim 15, characterized in that: The second transmission assembly also includes a rigid force-applying component, and the third and fourth wheels are basically fixed so that the second channel diameter of the second channel section is equal to or slightly larger than the diameter of the processed steel wire. The rigid force-applying component and at least one of the third and fourth wheels are connected to apply a constant force that tends to urge one of the two to approach the other.

19. A copper-clad steel continuous casting production line, comprising: A continuous casting furnace with a crystallizer assembly; A steel wire conveying device for a copper-clad steel continuous casting production line according to any one of claims 9 to 18; An uncoiling mechanism, a straightening mechanism and a polishing mechanism are sequentially arranged upstream of the continuous casting furnace; A cooling device is located downstream of the continuous casting furnace and between the rear end pull-out mechanism.

20. The copper-clad steel continuous casting production line according to claim 19, characterized in that: The copper-clad steel continuous casting production line further includes an uncoiling drive mechanism arranged in cooperation with the uncoiling mechanism and a straightening drive mechanism arranged in cooperation with the straightening mechanism, wherein the uncoiling drive mechanism and the straightening drive mechanism are both configured to clamp the processed steel wire in a radial direction, wherein the uncoiling drive mechanism is configured to apply a third radial force to the processed steel wire, and the straightening drive mechanism is configured to apply a fourth radial force to the processed steel wire; And wherein, the fourth radial force is not less than 1.5 times of the first radial force, and the third radial force is greater than the first radial force and less than the fourth radial force.

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