A wire drawing machine for producing steel stranded wires and its usage method

Abstract

The present invention relates to the technical field of wire drawing machines, and particularly relates to a strand production wire drawing machine and its use method, including: a wire drawing table, a wire drawing cover is fixedly connected to the top of the wire drawing table; a pre-drawing detection and auxiliary mechanism, the pre-drawing detection and auxiliary mechanism is arranged in the wire drawing cover, and the pre-drawing detection and auxiliary mechanism includes a support plate fixedly connected to the inner wall of the wire drawing cover. This wire drawing machine is provided with a pre-drawing detection and auxiliary mechanism. Through the arc-shaped strain gauge in 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 wire drawing, the PLC controller controls the current flowing into the resistance rod. When it is detected that the wire rod is thicker, the current flowing into the resistance rod is increased, so that the heat generation of the resistance rod increases, and the heat is transferred to the thicker position of the wire rod through the arc-shaped heat conducting sheet.

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 its usage method. Background Art

[0002] As a key device in the field of metal processing, a wire drawing machine mainly uses the drawing process to make thick metal materials into thin wires. During operation, a series of dies are used to continuously and stably apply force to the metal, causing it to gradually reduce in diameter under the constraint of the die through a tapered die hole, and finally form thin 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 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 vary in thickness, 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 properties 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, leading to differences in the thickness 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.

[0004] In addition, after long-term use, the die holes of the wire drawing dies wear, resulting in changes in shape and size. When the wire rods pass through, the extrusion forces on each part are different, and the deformation amounts are different, resulting in uneven thickness of the steel wires after wire drawing. However, the existing wire drawing machines cannot timely detect the thickness of the steel wires after wire drawing, cannot feedback whether the die wear is within the normal error range, and cannot timely handle the die wear after it occurs. Summary of the Invention

[0005] Aiming at the above-mentioned shortcomings of the existing technology, the present invention provides a steel strand production wire drawing machine and its usage method, which can effectively solve the problems that the existing technology cannot detect the thickness of the wire rods before wire drawing, assist in wire drawing in real time, cannot feedback whether the die wear is within the normal error range, and cannot timely handle the die wear after it occurs.

[0006] To achieve the above objectives, the present invention is realized through the following technical solutions:

[0007] The present invention provides a steel strand production wire drawing machine and its usage method, including:

[0008] A wire drawing table, on the top of which a wire drawing cover is fixedly connected;

[0009] Auxiliary mechanism for pre-drawing detection. The auxiliary mechanism for pre-drawing detection is arranged inside the wire drawing cover. The auxiliary mechanism for pre-drawing detection includes a support plate fixedly connected to the inner wall of the wire drawing cover. The top end 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. The opposite sides of the first conductive sheets are jointly fixedly connected with an arc-shaped strain gauge. The arc-shaped strain gauge and the first conductive sheets are electrically connected to a current detector to form a first detection circuit.

[0010] Auxiliary mechanism for post-drawing detection. The auxiliary mechanism for post-drawing detection is arranged inside the wire drawing cover. The auxiliary mechanism for post-drawing detection further includes a plurality of support rods fixedly connected to the top end of the wire drawing table. The top ends of the support rods are fixedly connected with a detection ring. Two symmetrically arranged second conductive sheets are fixedly connected to the inner wall of the detection ring. The opposite sides of the second conductive sheets are jointly fixedly connected with an arc-shaped graphene film. The arc-shaped graphene film, 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.

[0011] Preferably, support platforms are fixedly connected to the outer walls on both sides of the wire drawing cover. Two symmetrically arranged mounting plates are fixedly connected to the top ends of the two support platforms. A wire pay-off roller and a wire take-up roller 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 roller is fixedly connected to the outer wall of one of the mounting plates. Through holes for wire passing are commonly formed in the wire drawing cover. The current detector and the variable-frequency motor are electrically connected to a PLC controller to form a processing circuit.

[0012] 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.

[0013] 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. Conductive rings are fixedly connected to the inner walls of the sliding holes. 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.

[0014] 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.

[0015] 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 lower connecting plates. Removable lower main dies and lower auxiliary dies are respectively arranged at the upper ends of the two lower connecting plates. The upper ends of the lower main die and the lower auxiliary die are both fixedly connected with slot holes. The inner bottom wall of the slot hole is fixedly connected with a long-press switch. The telescopic ends of the upper main electric telescopic rod and the upper auxiliary electric telescopic rod are respectively fixedly connected with upper connecting plates. Removable upper main dies and upper auxiliary dies are respectively arranged at the bottom ends of the two upper connecting plates. The upper ends of the upper main die and the upper auxiliary die are both fixedly connected with insertion blocks that are in sliding contact with the slot holes, 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.

[0016] Preferably, lubrication cavities are respectively opened inside the upper main die, the upper auxiliary die, the lower main die, and the lower auxiliary die. Liquid outlet holes communicating with the lubrication cavities are opened on the inner peripheral walls of the upper main die, the upper auxiliary die, the lower main die, and the lower auxiliary die. An extrusion sheet is slidably connected to the inner wall of the lubrication cavity. A lubricating liquid storage space is formed between the extrusion sheet and the lubrication cavity, and a power space is formed between the extrusion sheet and the other part of the lubrication cavity. Air blowing pumps are fixedly connected to the top ends of the upper connecting plates and the bottom ends of the lower connecting plates respectively. The air blowing ends of the air blowing pumps are communicated with the inside of the power space. The PLC controller is electrically connected to the air blowing pumps to form a lubrication circuit.

[0017] Preferably, a method for using a steel strand production drawing machine includes the following steps:

[0018] S1. Pass the wire rod through the detection tube, the upper main die, the lower main die, the detection ring, and the wire passing hole in sequence, and then fix it on the take-up roller.

[0019] S2. Start drawing. Detect the wire rod through the pre-drawing detection auxiliary mechanism, heat the thicker wire rod, and thus assist in drawing.

[0020] S3. After each drawing, detect whether the drawing is qualified through the post-drawing detection auxiliary mechanism, and thus feedback whether the upper main die and the lower main die need to be replaced. When replacement is required, perform automatic replacement.

[0021] The technical solution provided by the present invention has the following beneficial effects compared with the known prior art:

[0022] 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 wire rod thickness before wire 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 wire drawing success rate and finished product rate.

[0023] 2. During the wire drawing process, the wire drawing machine can control the power of the blowing pump according to the detection of the wire rod thickness by the PLC controller. When the wire rod is thicker, the power of the blowing pump is increased, so that the extrusion sheet squeezes the lubricating fluid forward, increasing the outflow of the lubricating fluid 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.

[0024] 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 wire drawing is abnormal, reflecting possible problems with the die. The PLC controller can control the electric telescopic rod, first use the auxiliary die for wire drawing treatment, which is convenient for manual replacement of the main die after wire drawing, improving the production continuity and efficiency, and reducing production interruption and defective products caused by die problems. Description of the Drawings

[0025] 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 following drawings 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.

[0026] Figure 1 It is a three-dimensional structure schematic diagram of the present invention;

[0027] Figure 2 It is a three-dimensional structure schematic diagram inside the wire drawing cover of the present invention;

[0028] Figure 3 It is a three-dimensional structure schematic diagram inside the detection ring of the present invention;

[0029] Figure 4 It is a three-dimensional structure schematic diagram of the die of the present invention;

[0030] Figure 5Schematic three-dimensional structure diagram of the mold disassembly of the present invention;

[0031] Figure 6 Schematic three-dimensional structure diagram of the partial cross-section of the mold of the present invention;

[0032] Figure 7 Schematic three-dimensional structure diagram of the partial cross-section of the detection tube and the auxiliary tube of the present invention.

[0033] Reference numerals: 1, wire drawing table; 2, wire drawing cover; 3, detection and auxiliary mechanism before wire drawing; 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 conduction sheet; 312, fixing sheet; 313, return spring; 4, detection and auxiliary mechanism after wire drawing; 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, insert block; 46, lubricating 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, variable frequency motor; 10, wire passing hole. Detailed implementation manners

[0034] 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.

[0035] The present invention will be further described below with reference to the embodiments.

[0036] Embodiment: Refer to Figures 1 to 7 , a strand production wire drawing machine and its use method, including:

[0037] The wire drawing table 1, the top end of the wire drawing table 1 is fixedly connected with a wire drawing cover 2, both outer walls of the wire drawing cover 2 are fixedly connected with support platforms 5, the top ends of the two support platforms 5 are both fixedly connected with two symmetrically arranged mounting plates 6, a wire pay-off roller 7 and a wire take-up roller 8 are respectively rotatably connected to the opposite sides of the mounting plates 6 on the same side, a variable-frequency motor 9 for driving the wire take-up roller 8 is fixedly connected to the outer wall of one of the mounting plates 6, 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.

[0038] The pre-wire-drawing detection and auxiliary mechanism 3, 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, a detection tube 32 is fixedly connected to the top end of the support plate 31, two symmetrically arranged 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 sides of the first conductive sheets 33, 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, wherein the arc-shaped strain gauge 34 is a sensor element for measuring strain, usually composed of a sensitive grid, a substrate, a covering layer and 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 generate corresponding deformation when the object is stressed and deformed slightly, and convert this deformation into a change in resistance value, so as to realize 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;

[0039] The pre-wire-drawing detection and auxiliary mechanism 3 further includes two symmetrically arranged 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.

[0040] One end of the detection tube 32 away from the arc-shaped strain gauge 34 is fixedly connected with an auxiliary tube 36, heat insulation rings 37 are fixedly connected to both ends of the auxiliary tube 36, sliding holes 38 are circumferentially arranged on the outer peripheral wall of the auxiliary tube 36, conductive rings 39 are fixedly connected to the inner walls of the sliding holes 38, a resistance rod 310 is slidably connected to the inner wall of the conductive ring 39, an arc-shaped heat conducting sheet 311 is fixedly connected to the bottom end of the resistance rod 310, the arc-shaped heat conducting sheet 311 contacts the outer peripheral wall of the wire rod, and the PLC controller is electrically connected to the conductive ring 39 and the resistance rod 310 to form an auxiliary circuit.

[0041] A fixing piece 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 piece 312 and the inner peripheral wall of the auxiliary tube 36.

[0042] The post-drawing detection auxiliary mechanism 4 is arranged inside the drawing hood 2. The post-drawing detection auxiliary mechanism 4 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 symmetrically arranged 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 and the current detector are electrically connected 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 relativistic Dirac fermion behavior, with a very high carrier mobility. When the arc-shaped graphene film 44 is in an arc shape and deforms, 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 further cause a change in the resistance of the arc-shaped graphene film 44.

[0043] The post-drawing detection auxiliary mechanism 4 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 lower connecting plates 455. Lower main dies 456 and lower auxiliary dies 457 are detachably arranged at the upper ends of the two lower connecting plates 455 respectively. Slot holes 458 are fixedly connected to the upper ends of the lower main dies 456 and the lower auxiliary dies 457. A long-press switch 459 is fixedly connected to the inner bottom wall of the slot holes 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 upper connecting plates 4510. Upper main dies 4511 and upper auxiliary dies 4512 are detachably arranged at the bottom ends of the two upper connecting plates 4510 respectively. Plug blocks 4513 that are in sliding contact with the slot holes 458 are fixedly connected to the upper ends of the upper main dies 4511 and the upper auxiliary dies 4512. And the bottom end of the plug block 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.

[0044] 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 piece 48 is slidably connected to the inner wall of the lubrication cavity 46. A lubricating liquid storage space 49 is formed between the pressing piece 48 and the lubrication cavity 46, and another part of the pressing piece 48 and the lubrication cavity 46 forms a power space 410. At the top of the upper connecting plate 4510 and the bottom of the lower connecting plate 455, air blowing pumps 411 are fixedly connected. The air blowing ends of the air blowing pumps 411 communicate with the inside of the power space 410. The PLC controller is electrically connected to the air blowing pumps 411 to form a lubrication circuit.

[0045] The working principle of the present invention is as follows:

[0046] 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 roller 8.

[0047] Start the frequency conversion motor 9. Drive the take-up roller 8 to rotate through the frequency conversion motor 9, thereby winding the wire rod and applying a tensile 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 in drawing the wire rod. When the thicker wire rod is at the arc-shaped heat conducting piece 311, the thicker wire rod will extrude the arc-shaped heat conducting piece 311 outward, thereby causing the resistance rod 310 to move upward, thus 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 increase the 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.

[0048] 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 enables the material to undergo plastic deformation more easily during the wire drawing process, better adapt to the shape of the wire drawing die, reduce the possibility of fracture, improve the success rate and finished product rate of wire drawing, and thus achieve the effect of assisting wire drawing.

[0049] 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 is different, resulting in uneven thickness of the drawn wire. Therefore, after each wire rod is stretched, passing through the arc-shaped graphene film 44 will cause the arc-shaped graphene film 44 to 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 causes electrons to need to travel a greater distance when transmitting between carbon atoms, the electron transmission path 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;

[0050] 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 insertion 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.

[0051] During the wire drawing process, the thickness of the wire rod is detected through the above two detections, and then the PLC controller is used to control the start of the air blowing pump 411. When the wire rod is thicker, it is necessary to increase the power of the air blowing pump 411, thereby increasing the gas introduced into the power space 410, so that the extrusion sheet 48 presses the lubricating fluid forward, increasing the outflow of the lubricating fluid through the liquid outlet 47, making the thicker part of the wire rod adhere to 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, and at the same time ensuring the integrity of the wire rod surface, reducing surface defects caused by wear, and further assisting the wire drawing of the wire rod.

[0052] A method for using a wire drawing machine for producing steel strands includes the following steps:

[0053] 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.

[0054] S2. Start wire drawing. Detect the wire rod through the pre-wire drawing detection auxiliary mechanism 3, heat the thicker wire rod, and thereby assist wire drawing.

[0055] 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.

[0056] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; 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 described 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 stranded wires, characterized in that, Including: A wire drawing table (1), and a wire drawing cover (2) is fixedly connected to the top end of the wire drawing table (1); A pre-wire-drawing detection auxiliary mechanism (3), the pre-wire-drawing detection auxiliary mechanism (3) is arranged in the wire drawing cover (2), the pre-wire-drawing detection auxiliary mechanism (3) includes 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 end of the support plate (31), two symmetrically arranged 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 sides of the first conductive sheets (33), and 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; A post-wire-drawing detection auxiliary mechanism (4), the post-wire-drawing detection auxiliary mechanism (4) is arranged in the wire drawing cover (2), the post-wire-drawing detection auxiliary mechanism (4) further includes a plurality of support rods (41) fixedly connected to the top end of the wire drawing table (1), a detection ring (42) is fixedly connected to the top end of the support rod (41), two symmetrically arranged 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) and the second conductive sheets (43) are electrically connected to the current detector to form a second detection circuit, and a wire rod contacts the inner peripheral walls of the arc-shaped strain gauge (34) and the arc-shaped graphene film (44); Support platforms (5) are fixedly connected to the outer walls on both sides of the wire drawing cover (2), two symmetrically arranged mounting plates (6) are fixedly connected to the top ends of the two support platforms (5), a wire pay-off reel (7) and a wire take-up reel (8) are respectively rotatably connected to the opposite sides of the mounting plates (6) on the same side, a variable-frequency motor (9) for driving the wire take-up reel (8) is fixedly connected to the outer wall of one of the mounting plates (6), a wire passing hole (10) is commonly formed in the wire drawing cover (2), and the current detector and the variable-frequency motor (9) are electrically connected to a PLC controller to form a processing circuit; The pre-wire-drawing detection auxiliary mechanism (3) further includes two symmetrically arranged 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); One end of the detection tube (32) far away from the arc strain gauge (34) is fixedly connected with an auxiliary tube (36). Heat insulation rings (37) are fixedly connected to both ends of the auxiliary tube (36). Sliding holes (38) are circumferentially arranged on the outer peripheral wall of the auxiliary tube (36). A conductive ring (39) is fixedly connected to the inner wall of the sliding hole (38). A resistance rod (310) is slidably connected to the inner wall of the conductive ring (39). The bottom end of the resistance rod (310) is fixedly connected with an arc heat conducting sheet (311). The arc 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 ring (39) and the resistance rod (310) by electrical signals to form an auxiliary circuit; 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); The post-drawing detection auxiliary mechanism (4) further includes a plurality of wire drawing assemblies (45). Each wire drawing assembly (45) includes a lower main electric telescopic rod (451) and a lower auxiliary electric telescopic rod (452) fixedly connected in sequence at the top of the wire drawing table (1). An upper main electric telescopic rod (453) and an upper auxiliary electric telescopic rod (454) are fixedly connected in sequence to the inner top wall of the wire drawing cover (2). The telescopic ends of the lower main electric telescopic rod (451) and the lower auxiliary electric telescopic rod (452) are respectively fixedly connected with lower connecting plates (455). Lower main dies (456) and lower auxiliary dies (457) are detachably arranged at the upper ends of the two lower connecting plates (455). Slots (458) are fixedly connected to the upper ends of the lower main dies (456) and the lower auxiliary dies (457). 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 upper connecting plates (4510). Upper main dies (4511) and upper auxiliary dies (4512) are detachably arranged at the bottom ends of the two upper connecting plates (4510). Plug blocks (4513) which are in sliding contact with the slots (458) are fixedly connected to the upper ends of the upper main dies (4511) and the upper auxiliary dies (4512). And the bottom end of the plug block (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) by electrical signals to form a replacement circuit.

2. The wire drawing machine for producing steel stranded wires according to claim 1, wherein, Lubrication cavities (46) are provided inside the upper main die (4511), the upper auxiliary die (4512), the lower main die (456), and the lower auxiliary die (457). 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). Another part between the pressing sheet (48) and the lubrication cavity (46) forms a power space (410). Blowing pumps (411) are fixedly connected to the top of the upper connecting plate (4510) and the bottom 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.

3. The usage method of a wire drawing machine for producing steel strands according to claim 1, which is applied to a wire drawing machine for producing steel strands according to claim 2, is characterized in that, It 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 wire take-up roller (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 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, automatic replacement is performed.

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