Steel strand production wire drawing machine and use method thereof

Abstract

The invention relates to the technical field of wire drawing machines, in particular to a steel strand production wire drawing machine and a using method thereof. The steel strand production wire drawing machine comprises a wire drawing table, and the top end of the wire drawing table is fixedly connected with a wire drawing cover; and the before-wire-drawing detection auxiliary mechanism is arranged in the wire drawing cover, and the before-wire-drawing detection auxiliary mechanism comprises a supporting plate fixedly connected to the inner wall of the wire drawing cover. The wire drawing machine is provided with the before-wire-drawing detection auxiliary mechanism, the thickness of a wire rod can be detected before wire drawing through the arc-shaped strain gauge in the detection pipe, when the wire rod is thick, the resistance of the arc-shaped strain gauge is increased, the arc-shaped strain gauge can be detected by the current detector, a basis is provided for follow-up auxiliary wire drawing, and according to the detection result of the thickness of the wire rod before wire drawing, the wire rod can be accurately detected. The PLC controls the current introduced into the resistance rod, and when the wire rod is detected to be thicker, the current introduced into the resistance rod is increased, so that the heating value of the resistance rod is increased, and the heat is transferred to the thicker position of the wire rod through the arc-shaped heat-conducting fin.

Description

Technical Field

[0001] The present invention relates to the technical field of wire drawing machines, and particularly relates to a steel strand production wire drawing machine and a method for using the same. Background Art

[0002] As a key device in the field of metal processing, a wire drawing machine mainly makes thick metal materials into fine wires through the wire drawing process. During operation, a series of dies are used to continuously and stably apply force to the metal, making it gradually reduce its diameter through a tapered die hole under the constraint of the die, and finally form fine wires that meet the requirements. In the production process of steel strands, which are made by twisting multiple steel wires and are widely used in large-scale projects such as bridge construction and high-rise buildings, the wire drawing machine is also indispensable. With its efficient and precise wire drawing ability, it draws the raw material wire rods according to strict process standards. The product after wire drawing is steel wire, and multiple steel wires are twisted to form steel strands. For example, a steel strand production wire drawing machine disclosed in the application number CN202411473621.1 is a wire drawing machine for producing steel strands.

[0003] Before wire drawing, the wire rods are of different thicknesses, and the reasons involve multiple links. In the smelting link, chemical composition segregation causes uneven distribution of elements in the molten steel, and excessive gas content affects the performance of the steel, resulting in uneven deformation of the wire rods during subsequent processing; in the rolling link, uneven heating of the billets, rolling equipment failures, and unreasonable processes affect the uniformity of steel rolling deformation and the dimensional accuracy of the wire rods, resulting in different thicknesses of the wire rods. However, the existing wire drawing machines only default that all wire rods are of the same thickness, so they directly perform wire drawing on the wire rods without being able to detect the thickness of the wire rods before wire drawing and assist in wire drawing in real time. In addition, after long-term use, the die holes of the wire drawing dies are worn, and their shapes and sizes change. When the wire rods pass through, the extrusion forces on each part are different, and the deformation amounts are different, resulting in different thicknesses of the steel wires after wire drawing. However, the existing wire drawing machines cannot detect the thickness of the steel wires after wire drawing in time, cannot feedback whether the die wear is within the normal error range, and cannot process the die in time after wear. Summary of the Invention

[0004] Aiming at the above-mentioned disadvantages of the existing technology, the present invention provides a steel strand production wire drawing machine and a method for using the same, which can effectively solve the problems that the existing technology cannot detect the thickness of the wire rods before wire drawing and assist in wire drawing in real time, cannot feedback whether the die wear is within the normal error range, and cannot process the die in time after wear.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: The present invention provides a steel strand production wire drawing machine and a method for using the same, including: A wire drawing table, on the top of which a wire drawing cover is fixedly connected; Auxiliary mechanism for pre-drawing detection, the auxiliary mechanism for pre-drawing detection is arranged inside the drawing hood. The auxiliary mechanism for pre-drawing detection includes a support plate fixedly connected to the inner wall of the drawing hood. The top of the support plate is fixedly connected with a detection tube. Two symmetrically arranged first conductive sheets are fixedly connected to the inner wall of the detection tube. An arc-shaped strain gauge is fixedly connected to the opposite sides of the first conductive sheets. The arc-shaped strain gauge and the first conductive sheets are electrically connected to a current detector to form a first detection circuit; Auxiliary mechanism for post-drawing detection, the auxiliary mechanism for post-drawing detection is arranged inside the drawing hood. The auxiliary mechanism for post-drawing detection further includes a plurality of support rods fixedly connected to the top of the drawing table. The top of the support rod is fixedly connected with a detection ring. Two symmetrically arranged second conductive sheets are fixedly connected to the inner wall of the detection ring. An arc-shaped graphene film is fixedly connected to the opposite sides of the second conductive sheets. The arc-shaped graphene film and the second conductive sheets are electrically connected to the current detector to form a second detection circuit. The inner peripheral walls of the arc-shaped strain gauge and the arc-shaped graphene film are both in contact with the wire rod.

[0006] Preferably, support platforms are fixedly connected to the outer walls on both sides of the drawing hood. Two symmetrically arranged mounting plates are fixedly connected to the top of each of the two support platforms. A wire pay-off reel and a wire take-up reel are respectively rotatably connected to the opposite sides of the mounting plates on the same side. A variable-frequency motor for driving the wire take-up reel is fixedly connected to the outer wall of one of the mounting plates. The drawing hood is relatively commonly provided with a wire passing hole. The current detector and the variable-frequency motor are electrically connected to a PLC controller to form a processing circuit.

[0007] Preferably, the auxiliary mechanism for pre-drawing detection further includes two symmetrically arranged conical elastic stretching rings fixedly connected to the inner wall of the detection tube. The other ends of the two conical elastic stretching rings are respectively fixedly connected to the two ends of the arc-shaped strain gauge.

[0008] Preferably, an auxiliary tube is fixedly connected to the end of the detection tube away from the arc-shaped strain gauge. Heat insulation rings are fixedly connected to both ends of the auxiliary tube. Sliding holes are circumferentially arranged on the outer peripheral wall of the auxiliary tube. A conductive ring is fixedly connected to the inner wall of the sliding hole. A resistance rod is slidably connected to the inner wall of the conductive ring. An arc-shaped heat-conducting sheet is fixedly connected to the bottom end of the resistance rod. The arc-shaped heat-conducting sheet is in contact with the outer peripheral wall of the wire rod. The PLC controller is electrically connected to the conductive ring and the resistance rod to form an auxiliary circuit.

[0009] Preferably, a fixing piece is fixedly connected to the outer peripheral wall of the resistance rod inside the auxiliary tube. A return spring is fixedly connected between the fixing piece and the inner peripheral wall of the auxiliary tube.

[0010] Preferably, the post-drawing detection auxiliary mechanism further includes multiple groups of drawing components. Each group of drawing components includes a lower main electric telescopic rod and a lower auxiliary electric telescopic rod fixedly connected in sequence at the top of the drawing table. The inner top wall of the drawing cover is fixedly connected with an upper main electric telescopic rod and an upper auxiliary electric telescopic rod in sequence. The telescopic ends of the lower main electric telescopic rod and the lower auxiliary electric telescopic rod are respectively fixedly connected with a lower connecting plate. Removable lower main molds and lower auxiliary molds are respectively arranged at the upper ends of the two lower connecting plates. The upper ends of the lower main mold and the lower auxiliary mold are both fixedly connected with a slot, and a long-press switch is fixedly connected to the inner bottom wall of the slot. The telescopic ends of the upper main electric telescopic rod and the upper auxiliary electric telescopic rod are respectively fixedly connected with an upper connecting plate. Removable upper main molds and upper auxiliary molds are respectively arranged at the bottom ends of the two upper connecting plates. The upper ends of the upper main mold and the upper auxiliary mold are both fixedly connected with insertion blocks that are in sliding contact with the slots, and the bottom end of the insertion block is in intermittent contact with the long-press switch. The PLC controller is electrically connected to the lower main electric telescopic rod, the lower auxiliary electric telescopic rod, the upper main electric telescopic rod, the upper auxiliary electric telescopic rod, and the long-press switch to form a replacement circuit.

[0011] Preferably, lubrication cavities are respectively opened inside the upper main mold, the upper auxiliary mold, the lower main mold, and the lower auxiliary mold. Liquid outlet ports communicating with the lubrication cavities are opened on the inner peripheral walls of the upper main mold, the upper auxiliary mold, the lower main mold, and the lower auxiliary mold. A pressing sheet is slidably connected to the inner wall of the lubrication cavity. A lubricating liquid storage space is formed between the pressing sheet and the lubrication cavity, and a power space is formed between the pressing sheet and the other part of the lubrication cavity. The top ends of the upper connecting plates and the bottom ends of the lower connecting plates are both fixedly connected with blowing pumps. The blowing ends of the blowing pumps are communicated with the inside of the power space. The PLC controller is electrically connected to the blowing pumps to form a lubrication circuit.

[0012] Preferably, a method for using a steel strand production drawing machine includes the following steps: S1. Pass the wire rod through the detection tube, the upper main mold, the lower main mold, the detection ring, and the wire passing hole in sequence, and then fix it on the take-up reel. S2. Start drawing. Detect the wire rod through the pre-drawing detection auxiliary mechanism, heat the thicker wire rod, and thus assist in drawing. S3. After each drawing, detect whether the drawing is qualified through the post-drawing detection auxiliary mechanism, and thus feedback whether the upper main mold and the lower main mold need to be replaced. When replacement is required, perform automatic replacement.

[0013] The technical solution provided by the present invention has the following beneficial effects compared with the known prior art: 1. The wire drawing machine is equipped with a pre-drawing detection auxiliary mechanism. By means of the arc-shaped strain gauge inside the detection tube, the thickness of the wire rod can be detected before wire drawing. When the wire rod is thicker, the resistance of the arc-shaped strain gauge increases and can be detected by the current detector, providing a basis for subsequent auxiliary wire drawing. According to the detection result of the thickness of the wire rod before drawing, the PLC controller controls the current applied to the resistance rod. When it is detected that the wire rod is thicker, the current applied to the resistance rod is increased, so that the heat generation of the resistance rod increases. The heat is transferred to the thicker position of the wire rod through the arc-shaped heat conducting sheet, improving the plasticity of the material, reducing the yield strength, making the wire rod more likely to undergo plastic deformation, reducing the possibility of fracture, and improving the success rate and finished product rate of wire drawing.

[0014] 2. During the wire drawing process, the wire drawing machine can control the power of the air blowing pump according to the detection of the thickness of the wire rod through the PLC controller. When the wire rod is thicker, the power of the air blowing pump is increased, so that the extrusion sheet squeezes the lubricating liquid forward, increasing the outflow of the lubricating liquid through the liquid outlet, forming a thicker lubricating film between the wire rod and the wire drawing die, reducing friction and wear, and ensuring the surface integrity of the wire rod.

[0015] 3. The post-drawing detection auxiliary mechanism of the wire drawing machine can detect the thickness of the steel wire through the arc-shaped graphene film inside the detection ring after each wire rod drawing. When the arc-shaped graphene film is stretched and the current change exceeds the normal range, it can detect that the thickness of the steel wire after drawing is abnormal, reflecting possible problems with the die. The electric telescopic rod can be controlled through the PLC controller. First, an auxiliary die is used for wire drawing treatment, which facilitates manual replacement of the main die after wire drawing, improving production continuity and efficiency, and reducing production interruption and defective products caused by die problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a three-dimensional structure schematic diagram of the present invention; Figure 2 It is a three-dimensional structure schematic diagram inside the wire drawing cover of the present invention; Figure 3 It is a three-dimensional structure schematic diagram inside the detection ring of the present invention; Figure 4 It is a three-dimensional structure schematic diagram of the die of the present invention; Figure 5 It is a disassembled three-dimensional structure schematic diagram of the die of the present invention; Figure 6Schematic perspective sectional structure diagram of the mold part of the present invention; Figure 7 Schematic perspective sectional structure diagram of the detection tube and auxiliary tube parts of the present invention.

[0018] Reference numerals: 1, wire drawing table; 2, wire drawing cover; 3, pre-wire drawing detection and auxiliary mechanism; 31, support plate; 32, detection tube; 33, first conductive sheet; 34, arc strain gauge; 35, conical elastic stretching ring; 36, auxiliary tube; 37, heat insulation ring; 38, sliding hole; 39, conductive ring; 310, resistance rod; 311, arc heat conducting sheet; 312, fixing sheet; 313, return spring; 4, post-wire drawing detection and auxiliary mechanism; 41, support rod; 42, detection ring; 43, second conductive sheet; 44, arc graphene film; 45, wire drawing assembly; 451, lower main electric telescopic rod; 452, lower auxiliary electric telescopic rod; 453, upper main electric telescopic rod; 454, upper auxiliary electric telescopic rod; 455, lower connecting plate; 456, lower main mold; 457, lower auxiliary mold; 458, slot; 459, long press switch; 4510, upper connecting plate; 4511, upper main mold; 4512, upper auxiliary mold; 4513, insertion block; 46, lubrication cavity; 47, liquid outlet; 48, extrusion sheet; 49, lubricating liquid storage space; 410, power space; 411, air blowing pump; 5, support table; 6, mounting plate; 7, wire pay-off reel; 8, wire take-up reel; 9, frequency conversion motor; 10, wire passing hole. Detailed implementation manners

[0019] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] The present invention will be further described below with reference to the embodiments.

[0021] Embodiment: Refer to Figures 1 to 7 , a strand production wire drawing machine and its usage method, comprising: The wire drawing table 1 has a wire drawing cover 2 fixedly connected to the top thereof. Both outer walls of the wire drawing cover 2 are fixedly connected with support tables 5. The tops of the two support tables 5 are fixedly connected with two pairs of symmetric mounting plates 6. On the opposite sides of the mounting plates 6 on the same side, a wire pay-off roller 7 and a wire take-up roller 8 are respectively rotatably connected. The outer wall of one of the mounting plates 6 is fixedly connected with a variable frequency motor 9 for driving the wire take-up roller 8. The wire drawing cover 2 is commonly provided with a wire passing hole 10. The current detector and the variable frequency motor 9 are electrically connected to a PLC controller to form a processing circuit.

[0022] The pre-wire-drawing detection and auxiliary mechanism 3 is arranged inside the wire drawing cover 2. The pre-wire-drawing detection and auxiliary mechanism 3 includes a support plate 31 fixedly connected to the inner wall of the wire drawing cover 2. The top of the support plate 31 is fixedly connected with a detection tube 32. The inner wall of the detection tube 32 is fixedly connected with two pairs of symmetric first conductive sheets 33. The opposite sides of the first conductive sheets 33 are commonly fixedly connected with an arc-shaped strain gauge 34. The arc-shaped strain gauge 34 and the first conductive sheets 33 are electrically connected to a current detector to form a first detection circuit. Among them, the arc-shaped strain gauge 34 is a sensor element for measuring strain, usually composed of a sensitive grid, a substrate, a covering layer, leads, etc. Its working principle is based on the piezoresistive effect of metal or semiconductor materials, that is, when the material is deformed by an external force, its resistance value will change accordingly. In order to accurately sense and measure the strain of an object, the arc-shaped strain gauge 34 needs to have good elasticity, so that it can deform accordingly when the object is slightly deformed by the force, and convert this deformation into a change in resistance value, thereby realizing the measurement of strain. When the external force disappears, the arc-shaped strain gauge 34 can return to its original state for the next measurement; The pre-wire-drawing detection and auxiliary mechanism 3 further includes two pairs of symmetric conical elastic stretching rings 35 fixedly connected to the inner wall of the detection tube 32. The other ends of the two conical elastic stretching rings 35 are respectively fixedly connected to the two ends of the arc-shaped strain gauge 34.

[0023] One end of the detection tube 32 away from the arc-shaped strain gauge 34 is fixedly connected with an auxiliary tube 36. Both ends of the auxiliary tube 36 are fixedly connected with heat insulation rings 37. The outer peripheral wall of the auxiliary tube 36 is circumferentially provided with sliding holes 38. The inner wall of the sliding holes 38 is fixedly connected with conductive rings 39. The inner wall of the conductive rings 39 is slidably connected with a resistance rod 310. The bottom end of the resistance rod 310 is fixedly connected with an arc-shaped heat conducting sheet 311. The arc-shaped heat conducting sheet 311 is in contact with the outer peripheral wall of the wire rod. The PLC controller is electrically connected to the conductive rings 39 and the resistance rod 310 to form an auxiliary circuit.

[0024] A fixing piece 312 is fixedly connected to the outer peripheral wall of the resistance rod 310 inside the auxiliary tube 36. A return spring 313 is fixedly connected between the fixing piece 312 and the inner peripheral wall of the auxiliary tube 36.

[0025] The auxiliary mechanism 4 for post-drawing detection is arranged inside the drawing hood 2. The auxiliary mechanism 4 for post-drawing detection further includes a plurality of support rods 41 fixedly connected to the top end of the drawing table 1. The top ends of the support rods 41 are fixedly connected with a detection ring 42. Two symmetric second conductive sheets 43 are fixedly connected to the inner wall of the detection ring 42. An arc-shaped graphene film 44 is fixedly connected to the opposite sides of the second conductive sheets 43. The arc-shaped graphene film 44, the second conductive sheets 43 are electrically connected to a current detector to form a second detection circuit. The arc-shaped strain gauge 34 and the inner peripheral wall of the arc-shaped graphene film 44 are both in contact with the wire rod. The arc-shaped graphene film 44 has a unique two-dimensional honeycomb lattice structure, and the movement of electrons in it shows the behavior of relativistic Dirac fermions, with a very high carrier mobility. When the arc-shaped graphene film 44 is arc-shaped and deformed, its lattice structure will be stretched or compressed, resulting in changes in the bond length and bond angle between carbon atoms. This change in the microscopic structure will affect the electron transmission path and scattering probability, and thus change the resistance of the arc-shaped graphene film 44.

[0026] The auxiliary mechanism 4 for post-drawing detection further includes multiple groups of drawing assemblies 45. Each group of drawing assemblies 45 includes a lower main electric telescopic rod 451 and a lower auxiliary electric telescopic rod 452 fixedly connected to the top end of the drawing table 1 in sequence. An upper main electric telescopic rod 453 and an upper auxiliary electric telescopic rod 454 are fixedly connected to the inner top wall of the drawing hood 2 in sequence. The telescopic ends of the lower main electric telescopic rod 451 and the lower auxiliary electric telescopic rod 452 are respectively fixedly connected with a lower connecting plate 455. A lower main die 456 and a lower auxiliary die 457 are detachably arranged at the upper ends of the two lower connecting plates 455 respectively. A slot 458 is fixedly connected to the inner bottom wall of the slot 458. A long-press switch 459 is fixedly connected to the inner bottom wall of the slot 458. The telescopic ends of the upper main electric telescopic rod 453 and the upper auxiliary electric telescopic rod 454 are respectively fixedly connected with an upper connecting plate 4510. An upper main die 4511 and an upper auxiliary die 4512 are detachably arranged at the bottom ends of the two upper connecting plates 4510 respectively. A plug 4513 that is in sliding contact with the slot 458 is fixedly connected to the upper ends of the upper main die 4511 and the upper auxiliary die 4512. And the bottom end of the plug 4513 is in intermittent contact with the long-press switch 459. The PLC controller is electrically connected to the lower main electric telescopic rod 451, the lower auxiliary electric telescopic rod 452, the upper main electric telescopic rod 453, the upper auxiliary electric telescopic rod 454, and the long-press switch 459 to form a replacement circuit.

[0027] Inside the upper main die 4511, the upper auxiliary die 4512, the lower main die 456, and the lower auxiliary die 457, lubrication cavities 46 are provided. Liquid outlets 47 communicating with the lubrication cavities 46 are provided on the inner peripheral walls of the upper main die 4511, the upper auxiliary die 4512, the lower main die 456, and the lower auxiliary die 457. A pressing sheet 48 is slidably connected to the inner wall of the lubrication cavity 46. A lubricating liquid storage space 49 is formed between the pressing sheet 48 and the lubrication cavity 46, and another part of the pressing sheet 48 and the lubrication cavity 46 forms a power space 410. Blowing pumps 411 are fixedly connected to the top end of the upper connecting plate 4510 and the bottom end of the lower connecting plate 455. The blowing ends of the blowing pumps 411 communicate with the inside of the power space 410. The PLC controller is electrically connected to the blowing pumps 411 to form a lubrication circuit.

[0028] The working principle of the present invention is as follows: First, one end of the wire rod is sequentially passed through the arc-shaped strain gauge 34 in the detection tube 32, the die (formed by combining the upper main die 4511 and the lower main die 456), the arc-shaped graphene film 44 in the detection ring 42, and the wire passing hole 10, and then fixed on the take-up reel 8. Start the frequency conversion motor 9. Drive the take-up reel 8 to rotate through the frequency conversion motor 9, thereby winding the wire rod and applying a pulling force to the wire rod so that the wire rod can be drawn. During the process of the wire rod being stretched forward, the wire rod will first pass through the arc-shaped strain gauge 34. After pre-detecting the normal thickness of the wire rod, when the current remains unchanged, the current that can pass through the arc-shaped strain gauge 34 is x. When the wire rod is thicker, passing through the arc-shaped strain gauge 34 will increase the resistance of the arc-shaped strain gauge 34. The reason is that when the strain gauge is stretched, its length will increase, and at the same time, its cross-sectional area will decrease. Under the condition that the resistivity remains unchanged, both the increase in length and the decrease in cross-sectional area will cause the resistance to increase. And the current passing through the arc-shaped strain gauge 34 is detected by the current detector, and then the magnitude of the detected current is transmitted to the PLC controller through an electrical signal. Then, the current (increased) flowing into the resistance rod 310 is controlled by the PLC controller. The resistance rod 310 is energized all the time in the initial state, thereby heating the wire rod and assisting the wire rod drawing. When the thicker wire rod is at the arc-shaped heat conducting sheet 311, the thicker wire rod will extrude the arc-shaped heat conducting sheet 311 outward, thereby causing the resistance rod 310 to move upward, thereby changing the contact position between the resistance rod 310 and the conductive ring 39, and further achieving the effect of changing the length of the resistance rod 310. And by increasing the current flowing into the resistance rod 310, the heat generation amount of the resistance rod 310 is increased. The reason is that under the conditions of constant voltage, etc., the decrease in the length of the resistance rod 310 will make its resistance smaller. Then, according to Joule's law, in the same time, the decrease in resistance will cause an increase in heat generation. So the heat generation degree of the resistance rod 310 will rise, and due to the increase in current, the heat generation degree of the resistance rod 310 is further increased.

[0029] Then, the heat is transferred to the thicker position of the wire rod through the arc-shaped heat-conducting sheet 311, thereby heating the thicker position of the wire rod. After the thicker position of the wire rod is heated, the material temperature rises, the atomic thermal motion intensifies, the plasticity of the material is improved, and the yield strength is reduced. This makes it easier for the material to undergo plastic deformation during the wire drawing process, enabling it to better adapt to the shape of the wire drawing die, reducing the possibility of fracture, increasing the success rate and finished product rate of wire drawing, and thus achieving the effect of assisting wire drawing.

[0030] However, after the wire drawing die is used for a long time, the die hole wears, and the shape and size change. When the wire rod passes through, the extrusion pressure at each part is different, and the deformation amount varies, resulting in uneven thickness of the drawn wire. Therefore, after each wire rod is stretched and passes through the arc-shaped graphene film 44, the arc-shaped graphene film 44 will be stretched, thereby changing the current passing through the arc-shaped graphene film 44 (when the arc-shaped graphene film 44 is stretched, the two-dimensional honeycomb lattice structure of graphene will be changed, and the distance between carbon atoms will be enlarged. This makes it necessary for electrons to travel a greater distance when transmitting between carbon atoms, the transmission path of electrons becomes longer, thereby increasing the probability of electron scattering and resulting in an increase in resistance). The current passing through the arc-shaped graphene film 44 is detected by a current detector, and then the resistance change of the arc-shaped graphene film 44 is transmitted to the PLC controller through an electrical signal. The PLC controller detects the magnitude of the current passing through the arc-shaped graphene film 44 (after pre-detection, when the wire rod after each wire drawing passes through the arc-shaped graphene film 44, the magnitude of the current of the arc-shaped graphene film 44 will be within a normal range). When it is detected that the magnitude of the current passing through the arc-shaped graphene film 44 exceeds this range, the die needs to be replaced; When the die needs to be replaced, the lower auxiliary electric telescopic rod 452 and the upper auxiliary electric telescopic rod 454 are started under the control of the PLC controller, thereby driving the lower auxiliary die 457 and the upper auxiliary die 4512 to move towards the middle of the two. When the two are combined, the insert block 4513 will press the long press switch 459. At this time, the upper main electric telescopic rod 453 and the lower main electric telescopic rod 451 are controlled by the PLC controller to drive the lower main die 456 and the upper main die 4511 to move in the opposite direction between the two, so as to use the auxiliary die for wire drawing treatment, and then the lower main die 456 and the upper main die 4511 are replaced manually after the wire drawing is completed.

[0031] During the wire drawing process, the thickness of the wire rod is detected through the above two detections. Then, the PLC controller is used to control the start of the air blowing pump 411. When the wire rod is thicker, the power of the air blowing pump 411 needs to be increased, so as to increase the gas introduced into the power space 410. As a result, the extrusion sheet 48 presses the lubricating fluid forward, increasing the outflow of the lubricating fluid through the liquid outlet 47. This enables the thicker part of the wire rod to be coated with more lubricating fluid. More lubricating fluid can form a thicker lubricating film between the wire rod and the wire drawing die, effectively reducing the friction generated by their direct contact, reducing the wear of the wire rod surface and the die, extending the service life of the die, ensuring the integrity of the wire rod surface, reducing surface defects caused by wear, and further assisting in the wire drawing of the wire rod.

[0032] A method for using a wire drawing machine for producing steel strands includes the following steps: S1. Pass the wire rod through the detection tube 32, the upper main die 4511, the lower main die 456, the detection ring 42, and the wire passing hole 10 in sequence, and then fix it on the take-up reel 8. S2. Start wire drawing. Detect the wire rod through the pre-wire drawing detection auxiliary mechanism 3, heat the thicker wire rod, and thus assist in wire drawing. S3. After each wire drawing, detect whether the wire drawing is qualified through the post-wire drawing detection auxiliary mechanism 4, and then feedback whether the upper main die 4511 and the lower main die 456 need to be replaced. When replacement is required, perform automatic replacement.

[0033] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wire drawing machine for producing steel strands, characterized in that: include: A wire drawing platform (1), wherein a wire drawing cover (2) is fixedly connected to the top of the wire drawing platform (1); A pre-wire drawing detection auxiliary mechanism (3), the pre-wire drawing detection auxiliary mechanism (3) is arranged in a wire drawing cover (2), the pre-wire drawing detection auxiliary mechanism (3) comprises a support plate (31) fixedly connected to the inner wall of the wire drawing cover (2), a detection tube (32) is fixedly connected to the top of the support plate (31), two symmetrical first conductive sheets (33) are fixedly connected to the inner wall of the detection tube (32), an arc-shaped strain gauge (34) is fixedly connected to the opposite side of the first conductive sheet (33), and the arc-shaped strain gauge (34) and the first conductive sheet (33) are electrically connected to a current detector to form a first detection circuit; A post-drawing detection auxiliary mechanism (4), the post-drawing detection auxiliary mechanism (4) is arranged in a drawing cover (2), the post-drawing detection auxiliary mechanism (4) further comprises a plurality of support rods (41) fixedly connected to the top of a drawing table (1), the top of the support rods (41) is fixedly connected to a detection ring (42), the inner wall of the detection ring (42) is fixedly connected to two symmetrical second conductive sheets (43), the opposite sides of the second conductive sheets (43) are jointly fixedly connected to an arcuate graphene film (44), the arcuate graphene film (44) and the second conductive sheet (43) are electrically connected to a current detector to form a second detection circuit, and the inner peripheral walls of the arcuate strain gauge (34) and the arcuate graphene film (44) are in contact with a wire rod.

2. A steel strand production drawing machine according to claim 1, characterized in that: The outer walls on both sides of the wire drawing cover (2) are fixedly connected to support platforms (5), and the tops of the two support platforms (5) are fixedly connected to two symmetrical mounting plates (6). The opposite sides of the mounting plates (6) on the same side are rotatably connected to a wire unwinding roller (7) and a wire take-up roller (8), respectively. The outer wall of one of the mounting plates (6) is fixedly connected to a variable frequency motor (9) for driving the wire take-up roller (8). The wire drawing covers (2) are relatively provided with wire through holes (10). The electrical signals of the current detector and the variable frequency motor (9) are connected to a PLC controller to form a processing loop.

3. A steel strand production drawing machine according to claim 2, characterized in that: The pre-wire drawing detection auxiliary mechanism (3) also includes two symmetrical conical elastic stretching rings (35) fixedly connected to the inner wall of the detection tube (32), and the other ends of the two conical elastic stretching rings (35) are respectively fixedly connected to the two ends of the arc-shaped strain gauge (34).

4. A steel strand production wire drawing machine according to claim 3, characterized in that: An auxiliary tube (36) is fixedly connected to one end of the detection tube (32) away from the arc-shaped strain gauge (34), and both ends of the auxiliary tube (36) are fixedly connected to heat insulation rings (37). A sliding hole (38) is provided in a circumferential array on the outer wall of the auxiliary tube (36), and a conductive ring (39) is fixedly connected to the inner wall of the sliding hole (38). A resistor rod (310) is slidably connected to the inner wall of the conductive ring (39), and an arc-shaped heat conductive sheet (311) is fixedly connected to the bottom end of the resistor rod (310). The arc-shaped heat conductive sheet (311) contacts the outer wall of the wire rod. The PLC controller is electrically signal-connected to the conductive ring (39) and the resistor rod (310) to form an auxiliary circuit.

5. A steel strand production drawing machine according to claim 4, characterized in that: A fixing plate (312) is fixedly connected to the outer peripheral wall of the resistance rod (310) inside the auxiliary tube (36), and a return spring (313) is fixedly connected between the fixing plate (312) and the inner peripheral wall of the auxiliary tube (36).

6. A steel strand production wire drawing machine according to claim 5, characterized in that: The post-drawing inspection auxiliary mechanism (4) further comprises a plurality of groups of drawing components (45), each group of the drawing components (45) comprising a lower main electric telescopic rod (451) and a lower auxiliary electric telescopic rod (452) fixedly connected in sequence to the top of the drawing platform (1), an upper main electric telescopic rod (453) and an upper auxiliary electric telescopic rod (454) fixedly connected in sequence to the inner top wall of the drawing cover (2), the telescopic ends of the lower main electric telescopic rod (451) and the lower auxiliary electric telescopic rod (452) being fixedly connected to lower connecting plates (455) respectively, the upper ends of the two lower connecting plates (455) being detachably provided with a lower main mold (456) and a lower auxiliary mold (457), the upper ends of the lower main mold (456) and the lower auxiliary mold (457) being fixedly connected to a slot (458), the inner bottom wall of the slot (458) A long-press switch (459) is fixedly connected, and the telescopic ends of the upper main electric telescopic rod (453) and the upper auxiliary electric telescopic rod (454) are respectively fixedly connected to the upper connecting plate (4510), and the bottom ends of the two upper connecting plates (4510) are respectively detachably provided with an upper main mold (4511) and an upper auxiliary mold (4512), and the upper ends of the upper main mold (4511) and the upper auxiliary mold (4512) are both fixedly connected to an insert block (4513) that is in sliding contact with the slot (458), and the bottom end of the insert block (4513) is in intermittent contact with the long-press switch (459), and the PLC controller lower main electric telescopic rod (451), the lower auxiliary electric telescopic rod (452), the upper main electric telescopic rod (453), the upper auxiliary electric telescopic rod (454), and the long-press switch (459) are connected in electrical signals to form a replacement circuit.

7. A steel strand production wire drawing machine according to claim 6, characterized in that: The upper main mold (4511), the upper auxiliary mold (4512), the lower main mold (456), and the lower auxiliary mold (457) are each provided with a lubrication cavity (46); the inner peripheral walls of the upper main mold (4511), the upper auxiliary mold (4512), the lower main mold (456), and the lower auxiliary mold (457) are provided with a liquid outlet (47) connected to the lubrication cavity (46); the inner wall of the lubrication cavity (46) is slidably connected with an extrusion sheet (48); the extrusion sheet A lubricating liquid storage space (49) is formed between the upper connecting plate (4510) and the lubricating cavity (46); the extrusion plate (48) and another part of the lubricating cavity (46) form a power space (410); the top end of the upper connecting plate (4510) and the bottom end of the lower connecting plate (455) are fixedly connected to a blowing pump (411); the blowing end of the blowing pump (411) is connected to the inside of the power space (410); the PLC controller is connected to the blowing pump (411) by electrical signals to form a lubrication circuit.

8. The method for using a steel strand production wire drawing machine according to claim 1, applied to a steel strand production wire drawing machine according to claim 7, characterized in that: The following steps are involved: S1, passing the wire rod through the detection tube (32), the upper main mold (4511), the lower main mold (456), the detection ring (42), the wire hole (10) in sequence, and then fixing it on the take-up roller (8); S2, wire drawing begins, the wire rod is inspected by the pre-wire drawing inspection auxiliary mechanism (3), the thicker wire rod is heated, and the wire drawing is then assisted; S3. After each wire drawing, the wire drawing auxiliary detection mechanism (4) is used to detect whether the wire drawing is qualified, and then feedback is given as to whether the upper main mold (4511) and the lower main mold (456) need to be replaced. If replacement is required, the replacement is automatically performed.

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