An automatic wire drawing die with self-heating function

Abstract

The present invention discloses an automatic wire drawing die with a self-heating function, which relates to the technical field of wire drawing dies, including a main body, a die and a wire coil, wherein the die and the wire coil are installed above the main body, and the wire coil is installed on both sides of the main body, and a guide assembly is installed between the die and the wire coil, and the guide assemblies on both sides limit the metal wire so that the metal wire between the two groups of guide assemblies coincides with the horizontal center line of the die, and the die includes an entrance area, a working area, a sizing area and an exit area from the metal wire input direction to the output direction, and a heating mechanism is provided on the side of the die close to the metal wire input direction. The present invention heats the surface layer and the core layer of the metal wire synchronously through the heating mechanism, so that the difference between the surface layer temperature and the core layer temperature of the metal wire is reduced during the stretching of the metal wire, so that the metal wire is smoother during the stretching process, and the temperature of the core layer of the metal wire is prevented from being too low, and a cavity appears in the core layer of the metal wire during the stretching process.

Description

Technical Field

[0001] The invention relates to the technical field of wire drawing dies, in particular to an automatic wire drawing die with a self-heating function. Background Art

[0002] Metal wire drawing (also known as metal wire drawing or metal stretching) is a process of making metal raw materials into thinner metal wires through a stretching or drawing process. This technology is widely used in the manufacture of wires, cables, metal mesh, metal ropes, various metal products and as a raw material for other industrial products. The metal wire drawing process involves heating the metal raw materials and stretching them through a series of wire drawing dies of different diameters to finally obtain a metal wire with a certain diameter and strength. The wire drawing dies are usually made of carbide or diamond to ensure their durability during the wire drawing process.

[0003] During the wire drawing process, the temperature of the surface of the drawn part is very high, while the temperature of the inner core is relatively low, resulting in a huge temperature gradient. The inner core of the drawn part will be subjected to huge tensile stress, and the ring part outside the middle will be subjected to huge compressive stress. Under a large temperature gradient, defects such as microcracks are easily generated inside the finished drawn product, resulting in product scrapping. Summary of the invention

[0004] The object of the present invention is to provide an automated wire drawing die with a self-heating function to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: an automated wire drawing die with a self-heating function, comprising a main body, a die and a wire coil, wherein the die and the wire coil are installed above the main body, the wire coil is installed on both sides of the main body, a guide assembly is installed between the die and the wire coil, and the guide assemblies on both sides limit the position of the metal wire so that the metal wire between the two sets of guide assemblies coincides with the horizontal center line of the die;

[0006] The die includes an inlet area, a working area, a sizing area and an outlet area from the metal wire input direction to the output direction. A heating mechanism is provided on the side of the die close to the metal wire input direction. The heating mechanism is used to heat the metal wire. The heating process is to heat the surface layer and the core layer of the metal wire simultaneously.

[0007] A semiconductor refrigeration element is installed on one side of the mold, wherein the cooling end of the semiconductor refrigeration element is in contact with the mold, and the heating end of the semiconductor refrigeration element performs a slow cooling treatment on the drawn metal wire;

[0008] After leaving the wire coil on one side, the metal wire passes through the guide assembly, the mold and the guide assembly on the other side in sequence, and is finally recovered by the wire coil at the other end of the main body. Before the metal wire enters the mold, the heating mechanism heats the metal wire. The heating method of the heating mechanism allows the surface layer and the core layer of the metal wire to be heated synchronously. At the same time, a semiconductor refrigeration element is connected to the outside of the mold, wherein the cooling end of the semiconductor refrigeration element is in contact with the mold. During the wire drawing process, the cooling end of the semiconductor refrigeration element absorbs the heat from the mold in real time;

[0009] When the metal wire passes through the mold, it enters from the entrance area of ​​the mold, wherein the inner diameter of the working area of ​​the mold gradually narrows. When the metal wire passes through the working area, the working area of ​​the mold extrude the heated metal wire. Since the surface temperature of the metal wire is the same as the core temperature after being heated by the heating mechanism, the surface temperature of the metal wire rises under the extrusion of the mold. At the same time, the mold contacts the cooling end of the semiconductor refrigeration element, and the cooling end of the semiconductor refrigeration element continuously absorbs the heat of the surface of the metal wire through the mold. Under the combined effect of the mold extrusion effect and the cooling end of the semiconductor refrigeration element, the difference between the surface temperature of the metal wire and the core temperature is always within a controllable range by controlling the working power of the semiconductor refrigeration element.

[0010] Under the limitation of the working area of ​​the mold, the outer diameter of the metal wire gradually decreases until the outer diameter of the metal wire reaches the standard, and then the metal wire passes through the sizing area and the exit area of ​​the mold in sequence, and finally the metal wire leaves the mold. After leaving the mold, the metal wire enters the heating range of the semiconductor refrigeration element to reduce the temperature loss rate of the processed metal wire and slowly cool the metal wire;

[0011] By setting up a heating mechanism and a semiconductor refrigeration element, the temperature difference between the surface layer and the core layer of the metal wire is reduced before the metal wire passes through the mold processing. The heating method of the heating mechanism realizes synchronous heating of the surface layer and the core layer of the metal wire, and then cooperates with the semiconductor refrigeration element to control the temperature during the wire drawing.

[0012] Furthermore, the heating mechanism includes a current output device, which energizes the metal wire, and the mold is grounded, and the metal wire generates heat after being energized;

[0013] The metal wire is electrified. Due to the resistance of the metal wire itself, the heat inside the metal wire rises while the current passes through the metal wire, so that the surface layer and the core layer of the metal wire are heated synchronously.

[0014] When the metal wire passes through the working area of ​​the mold, the metal wire near the working area is deformed due to stretching. The metal wire near the working area of ​​the mold is conical, and the outer wall size of the cone matches the inner diameter size of the working area of ​​the mold. Finally, the outer diameter of the metal wire near the working area of ​​the mold is larger than the outer diameter of the metal wire before stretching and larger than the outer diameter of the metal wire after stretching. Due to the change in the outer diameter of the metal wire, the resistance of the metal wire with different outer diameter sizes changes, and then the heat generated per unit time under different outer diameter sizes of the metal wire is different;

[0015] Since the metal wire is in close contact with the die in the working area and the sizing area, and the die is grounded, when current passes through the metal wire in the working area and the sizing area, the current is diverted, and part of the current leaves through the die, thereby ultimately achieving a metal wire in the stretching area that generates much more heat per unit time than the metal wire in other areas. By energizing the metal wire, the effect of synchronous heating of the surface and core layer of the unstretched metal is achieved, and current still passes through the metal wire after stretching. When the current passes through the stretched metal wire, heat is still generated inside the metal wire, thereby achieving a slow cooling effect.

[0016] Furthermore, the heating mechanism includes a coil, which generates eddy currents after being powered on, and the metal wire passes through the area where the eddy currents are located before entering the mold, and the eddy currents heat the metal wire;

[0017] The metal wire passes through the energized coil before entering the mold. When the coil is energized, an alternating magnetic field is generated, and an induced current appears inside the metal wire. The induced current forms eddy currents inside the metal wire. As time accumulates, the heat energy generated by the eddy currents causes the internal and surface temperatures of the metal wire to rise, achieving a heating effect.

[0018] Furthermore, the heating mechanism includes an excitation coil and a flow channel, the excitation coil is wrapped around the outside of the flow channel, a metal wire passes through the middle of the flow channel, lubricating oil is arranged inside the flow channel, the lubricating oil has electrical conductivity, and a lubricating oil circulation circuit is arranged inside the flow channel;

[0019] The inner diameter of the inlet end of the flow channel is equal to the outer diameter of the metal wire, and the inner diameter of the outlet end of the flow channel is greater than the outer diameter of the metal wire;

[0020] The flow channel and the excitation coil are arranged concentrically. Under the action of the excitation coil, the metal wire passes through the flow channel and the excitation coil at the same time. Under the action of the alternating magnetic field, the metal wire forms an eddy current, thereby heating the metal wire.

[0021] The flow channel is filled with lubricating oil, which is also electrically conductive. The excitation coil and the conductive lubricating oil realize a working principle similar to that of an electromagnetic pump, in which the excitation coil generates a magnetic field in the flow channel. When the conductive fluid flows through this magnetic field, according to Faraday's law of electromagnetic induction, an induced electromotive force will be generated in the fluid, and then an induced current will be generated. The induced current interacts with the magnetic field, and according to the Lorentz force law, a force will be generated on the fluid. This force is called the Lorentz force. The direction of the Lorentz force is perpendicular to the direction of the current and the magnetic field, pushing the fluid to move along a specific path, thereby realizing the unidirectional transportation of the conductive lubricating oil in the flow channel;

[0022] Openings for the metal wire to pass through are provided at both ends of the flow channel. The metal wire enters from an opening at one end of the flow channel and then leaves from an opening at the other end of the flow channel. The inner diameter of the opening at the output end of the flow channel is larger than the outer diameter of the metal wire. When the metal wire passes through the flow channel, the lubricating oil will cover the surface of the metal wire and then leave with the metal wire. The flow direction of the lubricating oil in the flow channel is opposite to the movement direction of the metal wire. Under the action of its own tension, the lubricating oil cannot leave through the flow channel opening and the gap between the metal wires.

[0023] Furthermore, an impeller is arranged inside the flow channel, the metal wire passes through the central area of ​​the impeller, the outer wall of the impeller near the flow channel input end contacts the outer wall of the metal wire, the surface of one side of the impeller contacting the metal wire is an inclined surface, and the outer wall of the impeller near the flow channel output end does not contact the outer wall of the metal wire;

[0024] The impeller is set inside the flow channel. Under the action of the moving lubricating oil, the impeller rotates with the horizontal central axis of the flow channel as the center of the circle, and the metal wire passes through the center of the impeller. During the rotation of the impeller, the part of the impeller that contacts the metal wire, and the impeller cooperates with the lubricating oil to clean the impurities on the surface of the metal wire. Since the flow direction of the lubricating oil in the flow channel is opposite to the movement direction of the metal wire, the input end of the flow channel is the end where the metal wire enters the flow channel, and it is also the end of the movement of the lubricating oil in the flow channel. The flow mode of the lubricating oil: the reverse water washing method is adopted to achieve that the clean lubricating oil will cover the surface of the metal wire before the metal wire leaves the flow channel, and then the remaining lubricating oil cooperates with the impeller to clean the impurities on the surface of the metal wire to prevent the debris or dust on the surface of the metal wire from causing wear to the mold when passing through the mold. Finally, the lubricating oil carrying impurities will leave the flow channel.

[0025] Furthermore, an oil tank is provided on one side of the flow channel, the oil tank is connected to the flow channel, the input end of the oil tank is located below one side of the oil tank, the output end of the oil tank is located above the oil tank, and a filter is provided above the inside of the oil tank;

[0026] The setting of the flow channel and the oil tank is that when the lubricating oil carrying impurities returns to the oil tank, the inner diameter of the oil tank is much larger than the inner diameter of the flow channel. After the lubricating oil carrying impurities enters the oil tank, the flow effect of the lubricating oil inside the oil tank cannot allow the impurities to overcome the influence of gravity and move upward. Finally, the impurities produced by cleaning will be deposited under the lubricating oil under the action of gravity. At the same time, a filter is arranged inside the oil tank, which can further limit the upward movement of impurities and prevent the impurities from entering the flow channel again through the pipe above the oil tank.

[0027] Furthermore, the guide assembly includes a guide ring, the horizontal center line of the guide ring coincides with the horizontal center line of the mold, the inner diameter of the guide ring close to the mold is equal to the outer diameter of the metal wire, and the guide ring is provided with a conical groove on the side away from the mold;

[0028] The guide ring is set to keep the metal wire and the horizontal center line of the mold coincident when entering the mold, avoiding the metal wire entering or leaving the mold in an inclined posture, which will cause excessive wear on one side of the mold after long-term use.

[0029] Furthermore, a driving wheel is provided on the outer side of the guide ring, and the driving wheel is used to drive the guide ring to rotate with itself as the center of the circle;

[0030] By setting the driving wheel, the guide ring can rotate on its own. When the metal wire enters or leaves the guide ring in an inclined manner, the guide ring rotates on its own, which can make the surface of the conical groove inside the guide ring evenly stressed, avoiding excessive wear of the local area of ​​the guide ring. At the same time, the guide ring cooperates with the driving wheel to reduce the requirements for the position of the wire coil, making the placement of the wire coil more free.

[0031] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0032] By setting the heating mechanism, the heating mechanism heats the surface layer and the core layer of the metal wire simultaneously, so that the difference between the surface temperature of the metal wire and the core layer temperature is reduced during the stretching of the metal wire, so that the metal wire is smoother during the stretching process, and the temperature of the core layer of the metal wire is prevented from being too low, resulting in a cavity in the core layer of the metal wire during the stretching process;

[0033] At the same time, the mold is cooled to avoid the influence of high temperature on the hardness of the mold. During the drawing of the metal wire, the heat on the surface of the metal wire rises. The cooling end of the semiconductor refrigeration element cools the surface of the metal wire through the mold, thereby reducing the temperature difference between the surface and the core of the metal wire.

[0034] The guide ring and the driving wheel inside the guide assembly cooperate with each other to realize the self-rotation of the guide ring, so that the surface of the conical groove inside the guide ring is evenly stressed, avoiding excessive wear of the local area of ​​the guide ring, reducing the requirements for the position of the wire coil, and making the placement of the wire coil more free. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0036] Figure 1 Schematic diagram of the structure of the present invention (90° counterclockwise deflection);

[0037] Figure 2 It is a schematic diagram of the three-dimensional structure of the guide assembly of the present invention;

[0038] Figure 3 This is a schematic diagram of the full cross-sectional structure of the guide assembly of the present invention;

[0039] Figure 4 is a schematic diagram of the three-dimensional structure of the flow channel and its connecting mechanism in the third embodiment of the present invention;

[0040] Figure 5 1 is a schematic diagram of a full cross-sectional view of a flow channel and its connected mechanism in a third embodiment of the present invention;

[0041] Figure 6 This is a schematic diagram of the full cross-section structure of the flow channel and its inner and outer side mechanisms in the third embodiment of the present invention;

[0042] Figure 7 It is a schematic diagram of circuit connection of the first embodiment of the present invention (as well as the change in outer diameter of the metal wire when passing through the die).

[0043] In the figure: 1, main body; 2, mold; 3, guide assembly; 301, guide ring; 302, driving wheel; 401, excitation coil; 402, flow channel; 403, impeller; 404, oil tank. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] See also Figure 1-Figure 7The present invention provides a technical solution: an automated wire drawing die with a self-heating function, comprising a main body 1, a die 2 and a wire coil, wherein the die 2 and the wire coil are installed above the main body 1, and the wire coil is installed on both sides of the main body 1;

[0046] A semiconductor refrigeration element is installed on one side of the mold 2, wherein the cooling end of the semiconductor refrigeration element is in contact with the mold 2, and the heating end of the semiconductor refrigeration element performs a slow cooling treatment on the drawn metal wire;

[0047] The purpose of cooling the mold 2 is to avoid the influence of high temperature on the hardness of the mold 2. At the same time, during the drawing of the metal wire, the heat on the surface of the metal wire rises. The cooling end of the semiconductor cooling element cools the surface of the metal wire through the mold 2, thereby reducing the temperature difference between the surface and the core of the metal wire.

[0048] A guide assembly 3 is installed between the mold 2 and the wire coil, and the guide assemblies 3 on both sides limit the metal wire so that the metal wire between the two sets of guide assemblies 3 coincides with the horizontal center line of the mold 2;

[0049] The guide assembly 3 includes a guide ring 301, the horizontal center line of the guide ring 301 coincides with the horizontal center line of the mold 2, the inner diameter of the guide ring 301 close to the mold 2 is equal to the outer diameter of the metal wire, and the guide ring 301 is provided with a conical groove on the side away from the mold 2;

[0050] A driving wheel 302 is disposed on the outer side of the guide ring 301, and the driving wheel 302 is used to drive the guide ring 301 to rotate with itself as the center of the circle;

[0051] The guide ring 301 and the driving wheel 302 inside the guide assembly 3 cooperate with each other to realize the self-rotation of the guide ring 301, so that the surface of the conical groove inside the guide ring 301 is evenly stressed, thereby avoiding excessive wear of the local area of ​​the guide ring 301, reducing the requirements for the position of the wire coil, and making the position of the wire coil more free;

[0052] The die 2 includes an entrance area, a working area, a sizing area and an exit area from the wire input direction to the wire output direction. A heating mechanism is provided on the side of the die 2 close to the wire input direction. The heating mechanism is used to heat the wire. The heating process is to heat the surface layer and the core layer of the wire simultaneously.

[0053] Embodiment 1: The heating mechanism includes a current output device, which energizes the metal wire. The mold 2 is grounded, and the metal wire generates heat after being energized.

[0054] Embodiment 2: The heating mechanism includes a coil, which generates eddy currents after being powered on. The metal wire passes through the area where the eddy currents are located before entering the mold 2, and the eddy currents heat the metal wire.

[0055] Embodiment 3: The heating mechanism includes an excitation coil 401 and a flow channel 402. The excitation coil 401 is wrapped around the outside of the flow channel 402. A metal wire passes through the middle of the flow channel 402. Lubricating oil is provided inside the flow channel 402. The lubricating oil has electrical conductivity. A lubricating oil circulation circuit is provided inside the flow channel 402.

[0056] The inner diameter of the inlet end of the flow channel 402 is equal to the outer diameter of the metal wire, and the inner diameter of the outlet end of the flow channel 402 is greater than the outer diameter of the metal wire;

[0057] An impeller 403 is arranged inside the flow channel 402, and the metal wire passes through the central area of ​​the impeller 403. The outer wall of the impeller 403 near the input end of the flow channel 402 contacts the outer wall of the metal wire. The surface of one side of the impeller 403 contacting the metal wire is an inclined surface, and the outer wall of the impeller 403 near the output end of the flow channel 402 does not contact the outer wall of the metal wire.

[0058] An oil tank 404 is provided on one side of the flow channel 402 , and the oil tank 404 is connected to the flow channel 402 . The input end of the oil tank 404 is located below one side of the oil tank 404 , and the output end of the oil tank 404 is located above the oil tank 404 . A filter is provided above the interior of the oil tank 404 .

[0059] By setting up the heating mechanism, the heating mechanism heats the surface layer and the core layer of the metal wire simultaneously, so that the difference between the surface temperature of the metal wire and the core layer temperature of the metal wire is reduced during the stretching of the metal wire, so that the metal wire is smoother during the stretching process, and avoids the temperature of the core layer of the metal wire being too low, resulting in cavities in the core layer of the metal wire during the stretching process.

[0060] Working principle of the present invention:

[0061] After leaving the wire coil on one side, the metal wire passes through the guide assembly 3, the mold 2 and the guide assembly 3 on the other side in sequence, and is finally recovered by the wire coil at the other end of the main body 1. Before the metal wire enters the mold 2, the heating mechanism heats the metal wire. The heating method of the heating mechanism allows the metal wire to heat the surface layer and the core layer simultaneously. At the same time, a semiconductor refrigeration element is connected to the outer side of the mold 2, wherein the cooling end of the semiconductor refrigeration element is in contact with the mold 2. During the wire drawing period, the cooling end of the semiconductor refrigeration element absorbs the heat on the mold 2 in real time;

[0062] When the metal wire passes through the mold 2, the metal wire enters from the entrance area of ​​the mold 2, wherein the inner diameter of the working area of ​​the mold 2 gradually narrows. When the metal wire passes through the working area, the working area of ​​the mold 2 extrude the heated metal wire. Since the surface temperature of the metal wire is the same as the core temperature after being heated by the heating mechanism, the surface temperature of the metal wire rises under the extrusion of the mold 2. At the same time, the mold 2 contacts the cooling end of the semiconductor refrigeration element, and the cooling end of the semiconductor refrigeration element continuously absorbs the heat of the surface of the metal wire through the mold 2. Under the combined effect of the extrusion effect of the mold 2 and the cooling end of the semiconductor refrigeration element, the difference between the surface temperature of the metal wire and the core temperature is always within a controllable range by controlling the working power of the semiconductor refrigeration element.

[0063] Under the limitation of the working area of ​​the mold 2, the outer diameter of the metal wire gradually decreases until the outer diameter of the metal wire reaches the standard, and the metal wire then passes through the sizing area and the exit area of ​​the mold 2 in sequence, and finally the metal wire leaves the mold 2. After leaving the mold 2, the metal wire enters the heating range of the semiconductor refrigeration element to reduce the temperature loss rate of the processed metal wire and slowly cool the metal wire;

[0064] By setting up a heating mechanism and a semiconductor refrigeration element, the temperature difference between the surface layer and the core layer of the metal wire is reduced before the metal wire passes through the mold 2 for processing. The heating method of the heating mechanism realizes synchronous heating of the surface layer and the core layer of the metal wire, and then cooperates with the semiconductor refrigeration element to control the temperature during wire drawing.

[0065] Embodiment 1: The metal wire is electrified. Due to the resistance of the metal wire itself, the heat inside the metal wire rises while the current passes through the metal wire, thereby achieving synchronous heating of the surface layer and the core layer of the metal wire;

[0066] When the metal wire passes through the working area of ​​the mold 2, the metal wire near the working area is deformed due to stretching. The metal wire near the working area of ​​the mold 2 is conical, and the outer wall size of the cone matches the inner diameter size of the working area of ​​the mold 2. Finally, the outer diameter of the metal wire near the working area of ​​the mold 2 is larger than the outer diameter of the metal wire before stretching and larger than the outer diameter of the metal wire after stretching. Due to the change in the outer diameter of the metal wire, the resistance of the metal wire with different outer diameter sizes changes, and then the heat generated per unit time under different outer diameter sizes of the metal wire is different;

[0067] Since the metal wire is in close contact with the die 2 in the working area and the sizing area, and the die 2 is grounded, when current passes through the metal wire in the working area and the sizing area, the current is diverted, and part of the current leaves through the die 2, thereby ultimately achieving a metal wire in the stretching area that generates much more heat per unit time than the metal wire in other areas. By energizing the metal wire, the effect of synchronously heating the surface and core layer of the unstretched metal is achieved, and current still passes through the metal wire after stretching. When the current passes through the stretched metal wire, heat is still generated inside the metal wire, thereby achieving a slow cooling effect.

[0068] Embodiment 2: The metal wire passes through an energized coil before entering the mold 2. When the coil is energized, an alternating magnetic field is generated, and an induced current appears inside the metal wire. The induced current forms eddy currents inside the metal wire. As time accumulates, the heat energy generated by the eddy currents causes the internal and surface temperatures of the metal wire to rise, thereby achieving a heating effect.

[0069] Embodiment 3: The flow channel 402 and the excitation coil 401 are arranged concentrically. Under the action of the excitation coil 401, the metal wire passes through the flow channel 402 and the excitation coil 401 at the same time. Under the action of the alternating magnetic field, the metal wire forms an eddy current, thereby heating the metal wire.

[0070] The flow channel 402 is filled with lubricating oil, which is also electrically conductive. The excitation coil 401 cooperates with the electrically conductive lubricating oil to realize a working principle similar to that of an electromagnetic pump, wherein the excitation coil 401 generates a magnetic field in the flow channel 402. When the electrically conductive fluid flows through this magnetic field, according to Faraday's law of electromagnetic induction, an induced electromotive force is generated in the fluid, thereby generating an induced current. The induced current interacts with the magnetic field, and according to the Lorentz force law, a force is generated on the fluid. This force is called the Lorentz force. The direction of the Lorentz force is perpendicular to the direction of the current and the magnetic field, pushing the fluid to move along a specific path, thereby realizing the unidirectional transport of the electrically conductive lubricating oil in the flow channel 402.

[0071] Openings for the metal wire to pass through are provided at both ends of the flow channel 402. The metal wire enters from the opening at one end of the flow channel 402 and then leaves from the opening at the other end of the flow channel 402. The inner diameter of the opening at the output end of the flow channel 402 is larger than the outer diameter of the metal wire. When the metal wire passes through the flow channel 402, the lubricating oil will cover the surface of the metal wire and then leave with the metal wire. The flow direction of the lubricating oil in the flow channel 402 is opposite to the movement direction of the metal wire. Under the action of its own tension, the lubricating oil cannot leave through the opening of the flow channel 402 and the gap between the metal wires.

[0072] The impeller 403 is arranged inside the flow channel 402. Under the action of the moving lubricating oil, the impeller 403 rotates with the horizontal central axis of the flow channel 402 as the center of the circle, and the metal wire passes through the center of the impeller 403. During the rotation of the impeller 403, the part where the impeller 403 contacts the metal wire, the impeller 403 cooperates with the lubricating oil to clean the impurities on the surface of the metal wire. Since the flow direction of the lubricating oil in the flow channel 402 is opposite to the movement direction of the metal wire, the input end of the flow channel 402 is the end where the metal wire enters the flow channel 402, and it is also the end of the movement of the lubricating oil in the flow channel 402. The flow mode of the lubricating oil: adopting the reverse water washing mode, the clean lubricating oil will cover the surface of the metal wire before the metal wire leaves the flow channel 402, and then the remaining lubricating oil cooperates with the impeller 403 to clean the impurities on the surface of the metal wire, so as to avoid the debris or dust on the surface of the metal wire causing wear to the mold 2 when passing through the mold 2, and finally the lubricating oil carrying impurities will leave the flow channel 402;

[0073] The flow channel 402 and the oil tank 404 are arranged such that when the lubricating oil carrying impurities returns to the oil tank 404, the inner diameter of the oil tank 404 is much larger than the inner diameter of the flow channel 402. Since the lubricating oil carrying impurities enters the oil tank 404, the flow effect of the lubricating oil inside the oil tank 404 cannot allow the impurities to overcome the influence of gravity and move upward. Finally, the impurities generated by cleaning will be deposited under the lubricating oil under the action of gravity. At the same time, a filter is arranged inside the oil tank 404 to further limit the upward movement of impurities and prevent the impurities from entering the flow channel 402 again through the pipe above the oil tank 404.

[0074] The guide ring 301 is provided to keep the metal wire and the horizontal center line of the mold 2 coincident when entering the mold 2, so as to prevent the metal wire from entering or leaving the mold 2 in an inclined posture, which would cause excessive wear on one side of the mold 2 after long-term use;

[0075] By setting the driving wheel 302, the guide ring 301 can rotate. When the metal wire enters or leaves the guide ring 301 in an inclined manner, the guide ring 301 rotates, which can make the surface of the conical groove inside the guide ring 301 evenly stressed, avoiding excessive wear of the local area of ​​the guide ring 301. At the same time, the guide ring 301 cooperates with the driving wheel 302 to reduce the requirements for the position of the wire coil, so that the wire coil can be placed more freely.

[0076] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0077] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automated wire drawing die with a self-heating function, comprising a main body (1), a die (2) and a wire coil, wherein the die (2) and the wire coil are mounted above the main body (1), and the wire coil is mounted on both sides of the main body (1), characterized in that: A guide assembly (3) is installed between the mold (2) and the wire coil, and the guide assemblies (3) on both sides limit the metal wire so that the metal wire between the two groups of guide assemblies (3) coincides with the horizontal center line of the mold (2); the mold (2) includes an entrance area, a working area, a sizing area and an exit area from the metal wire input direction to the output direction, and a heating mechanism is provided on the side of the mold (2) close to the metal wire input direction, and the heating mechanism is used to heat the metal wire, and the heating process is to heat the surface layer and the core layer of the metal wire simultaneously; a semiconductor refrigeration element is installed on one side of the mold (2), wherein the cooling end of the semiconductor refrigeration element is in contact with the mold (2), and the heating end of the semiconductor refrigeration element performs a slow cooling treatment on the drawn metal wire; The heating mechanism comprises an excitation coil (401) and a flow channel (402); an impeller (403) is arranged inside the flow channel (402); a metal wire passes through the central area of ​​the impeller (403); an outer wall of the impeller (403) near the input end of the flow channel (402) contacts the outer wall of the metal wire; a surface of one side of the impeller (403) in contact with the metal wire is an inclined surface; an outer wall of the impeller (403) near the output end of the flow channel (402) does not contact the outer wall of the metal wire; the excitation coil (401) is wrapped around the outside of the flow channel (402); a metal wire passes through the middle of the flow channel (402); and lubricating oil is arranged inside the flow channel (402); the lubricating oil has electrical conductivity.

2. The automatic wire drawing die with self-heating function according to claim 1, characterized in that: A lubricating oil circulation circuit is provided inside the flow channel (402); the inner diameter of the inlet end of the flow channel (402) is equal to the outer diameter of the metal wire, and the inner diameter of the outlet end of the flow channel (402) is greater than the outer diameter of the metal wire.

3. The automatic wire drawing die with self-heating function according to claim 2, characterized in that: An oil tank (404) is provided on one side of the flow channel (402), the oil tank (404) being connected to the flow channel (402), the input end of the oil tank (404) being located below one side of the oil tank (404), the output end of the oil tank (404) being located above the oil tank (404), and a filter screen being provided above the interior of the oil tank (404).

4. An automated wire drawing die with self-heating function according to any one of claims 1 to 3, characterized in that: The guide assembly (3) comprises a guide ring (301), the horizontal center line of the guide ring (301) coincides with the horizontal center line of the mold (2), the inner diameter of the guide ring (301) close to the mold (2) is equal to the outer diameter of the metal wire, and the guide ring (301) is provided with a conical groove on the side away from the mold (2).

5. The automatic wire drawing die with self-heating function according to claim 4, characterized in that: A driving wheel (302) is arranged on the outer side of the guide ring (301), and the driving wheel (302) is used to drive the guide ring (301) to rotate with itself as the center of the circle.

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