High-straightness superfine metal wire drawing device

Abstract

The invention relates to the technical field of wire drawing equipment, and provides a high-straightness superfine metal wire drawing device. In the device, the first wire drawing die assembly between the first wire drawing roller and the second wire drawing roller is used for carrying out multi-pass preliminary wire drawing on the metal wire released by the pay-off unit, so that the wire drawing efficiency of the superfine metal wire is effectively improved, the wire breakage rate and the wire drawing cost are reduced, the wire drawing uniformity is good, and the area reduction rate is stable; due to the design of the three wire drawing rollers, the slip coefficient is increased, the wire breakage rate is reduced, and large-length drawing of the metal wires is ensured; single-pass secondary wiredrawing is carried out on the metal wire rod subjected to primary wiredrawing through the second wiredrawing die assembly, then secondary wiredrawing of the metal wire rod subjected to multi-pass primary wiredrawing is achieved, and the wiredrawing size is further reduced; the first wire drawing roller and the second wire drawing roller are arranged in parallel in the vertical direction, the problem that the wire drawing die possibly deviates from a metal wire under the strain effect is effectively solved, and the metal wire breaking probability is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of wire drawing equipment, and in particular to a wire drawing device for extremely fine metal wires with high straightness. Background Art

[0002] As electronic products, chips, and medical devices become smaller and smaller, and their integration becomes higher and higher, higher requirements are placed on the comprehensive performance of metal filaments: high conductivity and high elongation are required for performance in use; ultra-fine, ultra-long, and ultra-precision are required for process performance, such as 0.02mm diameter and ±0.0003mm deviation for integrated circuit packaging bonding wires, and more than 400,000 meters of 0.025mm wire for data transmission. The existing wire drawing device uses a single roller method, and the distance between the roller and the retractable wire is large. The wire material fluctuates greatly during the wire drawing process, resulting in a high wire breakage rate, which cannot meet the needs of integrated circuits, electronic communications, medical and other fields for high-performance ultra-fine metal wires. In addition, the wire drawing equipment is large in size and inconvenient to install and use. Summary of the invention

[0003] The purpose of the present application is to provide a high-straightness ultra-fine metal wire drawing device to solve or alleviate the problems existing in the above-mentioned prior art.

[0004] In order to achieve the above objectives, this application provides the following technical solutions:

[0005] The present application provides a high-straightness ultra-fine metal wire drawing device, comprising: a wire drawing unit, a wire release unit and a wire take-up unit, wherein the wire release unit and the wire take-up unit are respectively arranged on both sides of the wire drawing unit, wherein the wire release unit is used to release the metal wire to be drawn to the wire drawing unit, and the wire take-up unit is used to collect the metal wire after being drawn by the wire drawing unit;

[0006] The wire drawing unit is used for drawing metal wires, and comprises: a lubricating liquid tank, a first wire drawing roller, a second wire drawing roller, a third wire drawing roller, a first wire drawing die assembly and a second wire drawing die assembly;

[0007] The lubricating liquid tank is filled with lubricating liquid, which is used to lubricate and cool the metal wire during the wire drawing process;

[0008] The first wire drawing roller and the second wire drawing roller are arranged in parallel above the lubricating liquid tank in the height direction; the third wire drawing roller is located on the outside of the lubricating liquid tank, and is arranged in parallel with the first wire drawing roller in the horizontal direction; the first wire drawing roller, the second wire drawing roller and the first wire drawing die assembly perform multiple passes of preliminary wire drawing on the metal wire to be drawn released by the wire release unit, and the third wire drawing roller, the first wire drawing roller and the second wire drawing die assembly perform a single pass of secondary wire drawing on the metal wire after the preliminary wire drawing;

[0009] The first wire drawing die assembly is located between the first wire drawing roller and the second wire drawing roller, the second wire drawing die assembly is located between the first wire drawing roller and the third wire drawing roller, and wire drawing dies are installed in the first wire drawing die assembly and the second wire drawing die assembly; wherein, the axis of the wire passing hole of each wire drawing die in the first wire drawing die assembly is tangent to the first wire drawing roller and the second wire drawing roller in the vertical direction; the axis of the wire passing hole of the wire drawing die in the second wire drawing die assembly is tangent to the first wire drawing roller and the third wire drawing roller in the horizontal direction.

[0010] Preferably, the second wire drawing die assembly is installed on the inner side of the side plate of the lubricating liquid tank, and the first wire drawing die is installed on the side plate close to the lubricating liquid tank where the second wire drawing die is installed.

[0011] Preferably, n wire drawing dies are evenly distributed on the first wire drawing die assembly, and correspondingly, the metal wire to be drawn released by the wire-releasing unit passes downward from the top of the first wire drawing roller through the wire drawing die on the first wire drawing die assembly, is then wound upward from the bottom of the second wire drawing roller, and is successively wound between the first wire drawing roller, n wire drawing dies and the second wire drawing roller n times, and then is passed from the top of the first wire drawing roller along the horizontal direction into the wire drawing die in the second wire drawing die assembly; wherein n is a positive integer.

[0012] Preferably, a wire drawing die is installed in the second wire drawing die assembly, and correspondingly, the metal wire passing through the wire drawing die of the second wire drawing die assembly is wound around the third wire drawing roller for one circle and then the metal wire after drawing is collected by the wire taking-up unit.

[0013] Preferably, the first wire drawing die assembly comprises: a die frame and the wire drawing die, the die frame is provided with a plurality of die placement holes along the length direction, and the plurality of die placement holes are respectively installed with the wire drawing dies whose wire drawing sizes gradually decrease along the length direction of the die frame; the size of the wire drawing die in the second wire drawing die assembly is smaller than the size of the smallest wire drawing die in the first wire drawing die assembly.

[0014] Preferably, a first lubricating liquid pipe is provided in combination with the first wire drawing die assembly, the first lubricating liquid pipe is arranged in parallel with the die frame, and a plurality of lubricating liquid nozzles are arranged along the length direction, and the plurality of lubricating liquid nozzles are respectively and respectively facing the centers of the wire passing holes of the plurality of wire drawing dies in the first wire drawing die assembly, so as to spray the lubricating liquid in the lubricating liquid tank to the centers of the plurality of wire drawing dies in the first wire drawing die assembly; a second lubricating liquid pipe is provided in combination with the second wire drawing die assembly, and the lubricating liquid nozzle is provided in the second lubricating liquid pipe, facing the centers of the wire passing holes of the wire drawing dies installed in the second wire drawing die assembly, so as to spray the lubricating liquid in the lubricating liquid tank to the centers of the wire drawing dies in the second wire drawing die assembly.

[0015] Preferably, the first wire drawing roller, the second wire drawing roller, and the third wire drawing roller are independently driven by separate servo motors respectively.

[0016] Preferably, the first wire drawing roller, the second wire drawing roller and the third wire drawing roller are made of ceramic or have ceramic sprayed on the surface, and have a hardness higher than 400 HV.

[0017] Preferably, a servo tension mechanism is provided between the wire drawing unit and the wire unwinding unit, and between the wire drawing unit and the wire taking-up unit, so as to tension the metal wire entering and exiting the wire drawing unit.

[0018] Beneficial effects:

[0019] In the high-straightness ultra-fine metal wire drawing device provided in the embodiment of the present application, the metal wire released by the wire-releasing unit is drawn by the wire drawing unit; in the wire drawing unit, the metal wire in the wire drawing process is lubricated and cooled by the lubricating liquid contained in the lubricating liquid tank; the metal wire after wire drawing is wound and stored by the wire taking-up unit. In the wire drawing unit, the first wire drawing roller and the second wire drawing roller are arranged side by side above the lubricating liquid tank in the height direction, and the first wire drawing die assembly is arranged between the first wire drawing roller and the second wire drawing roller, and the axis of the wire passing hole of each wire drawing die in the first wire drawing die assembly is tangent to the first wire drawing roller and the second wire drawing roller in the vertical direction. Thereby, the metal wire released by the pay-off unit is subjected to multiple preliminary wire drawing through the first wire drawing die assembly between the first wire drawing roller and the second wire drawing roller, thereby effectively improving the wire drawing efficiency of the ultra-fine metal wire, reducing the wire breakage rate and the wire drawing cost, and achieving good wire drawing uniformity and a stable surface reduction rate; the double-roller design of the first wire drawing roller and the second wire drawing roller increases the slip coefficient, reduces the wire breakage rate, and ensures the long length drawing of the metal wire.

[0020] The third wire drawing roller is located outside the lubricating liquid tank and is arranged in parallel with the first wire drawing roller in the horizontal direction. A second wire drawing die is arranged between the first wire drawing roller and the third wire drawing roller. The axis of the wire drawing die through the wire drawing die assembly is tangent to the first wire drawing roller and the third wire drawing roller in the horizontal direction. Thus, the metal wire material that has undergone preliminary wire drawing is subjected to a single-pass secondary wire drawing through the second wire drawing die assembly between the first wire drawing roller and the third wire drawing roller, and then the metal wire material that has undergone multiple preliminary wire drawing is re-drawn, and the wire drawing size is further reduced.

[0021] At the same time, the first wire drawing roller and the second wire drawing roller are arranged in parallel in the vertical direction, so that when the metal wire is wound between the first wire drawing roller and the second wire drawing roller for multiple times during the wire drawing process, it can pass through the center of multiple wire drawing dies in the first wire drawing die assembly, which effectively solves the problem that when the first wire drawing roller and the second wire drawing roller are arranged horizontally, the wire drawing die assembly is deformed after long-term work, which may cause the wire drawing die to deviate from the drawn metal wire under the action of strain, thereby effectively reducing the probability of wire breakage during the wire drawing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings in the specification, which constitute a part of the present application, are used to provide further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0023] in:

[0024] Figure 1A schematic diagram of the principle of a high-straightness ultra-fine metal wire drawing device provided according to some embodiments of the present application;

[0025] Figure 2 A schematic structural diagram of a highly straight and ultra-fine metal wire drawing device provided according to some embodiments of the present application;

[0026] Figure 3 for Figure 2 Another structural schematic diagram of a highly straight and ultra-fine metal wire drawing device is shown.

[0027] Description of reference numerals:

[0028] 100, wire-paying unit; 200, servo tension mechanism; 300, wire-drawing unit; 400, wire-taking unit;

[0029] 301, first wire drawing roller; 302, second wire drawing roller; 303, first wire drawing die assembly; 304, first lubricating liquid pipe; 305, second lubricating liquid pipe; 306, second wire drawing die assembly; 307, lubricating liquid tank; 308, third wire drawing roller. DETAILED DESCRIPTION

[0030] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. Each example is provided by way of explanation of the present application and does not limit the present application. In fact, it will be clear to those skilled in the art that modifications and variations may be made in the present application without departing from the scope or spirit of the present application. For example, a feature shown or described as a part of an embodiment may be used in another embodiment to produce yet another embodiment. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the embodiments of the present invention should belong to the scope of protection of the embodiments of the present invention.

[0031] The existing wire drawing process uses a single roller or a tower wheel for wire drawing. This process has the following disadvantages: (1) The single roller for wire drawing has a large equipment volume, a long distance between the wire drawing roller and the wire collection, and large fluctuations in the wire material, resulting in a high wire breakage rate and a low yield rate; (2) The equipment volume is large and the cost is high, which increases the wire drawing cost; (3) Single roller drawing requires frequent replacement of materials and equipment, high work intensity, low efficiency, large fluctuations in process parameters, and poor consistency of the processed wire. These problems seriously affect the efficiency, consistency and performance of ultra-fine wire processing, and bring inconvenience to the subsequent processing and use of ultra-fine wire.

[0032] Based on this, the present application embodiment proposes a high straightness ultra-fine metal wire drawing device, such as Figures 1 to 3As shown, the wire drawing device includes: a wire drawing unit 300, a wire pay-off unit 100 and a wire take-up unit 400. The wire drawing unit 300 is used to draw metal wires, and the wire pay-off unit 100 and the wire take-up unit 400 are respectively arranged on both sides of the wire drawing unit 300. The wire pay-off unit 100 is used to release the metal wires to be drawn to the wire drawing unit 300, and the wire take-up unit 400 is used to store the metal wires after being drawn by the wire drawing unit 300. The wire drawing unit 300, the wire pay-off unit 100 and the wire take-up unit 400 are all installed on the wire drawing platform. Specifically, a support plate is arranged on the wire drawing platform; along the length direction of the wire drawing platform, the wire pay-off unit 100, the wire drawing unit 300 and the wire take-up unit 400 are arranged on the support plate in sequence.

[0033] In the wire drawing unit 300, a lubricating liquid tank 307, a first wire drawing roller 301, a second wire drawing roller 302, a third wire drawing roller 308, a first wire drawing die assembly 303 and a second wire drawing die assembly 306 are provided. The lubricating liquid tank 307 is a rectangular tank with an opening at the upper end, the bottom surface of which is located on the wire drawing platform and is fixed to the support plate by bolt fasteners. The gap at the connection between the lubricating liquid tank 307 and the support plate is sealed by a sealing rubber gasket to prevent the lubricating liquid in the lubricating liquid tank 307 from flowing out. The rectangular tank of the lubricating liquid tank 307 is filled with lubricating liquid, and the lubricating liquid in the rectangular tank is sprayed by a pumping unit arranged in the lubricating liquid tank 307, so as to realize the wire drawing lubrication and cooling of the metal wire during the wire drawing process, and effectively reduce the wire drawing breakage rate.

[0034] The first wire drawing roller 301 and the second wire drawing roller 302 are arranged in parallel above the lubricating liquid tank 307 in the height direction; the third wire drawing roller 308 is located on the outside of the lubricating liquid tank 307, and is arranged in parallel with the first wire drawing roller 301 in the horizontal direction. The first wire drawing roller 301, the second wire drawing roller 302, and the third wire drawing roller 308 are all independently driven by independent wire drawing servo motors to avoid the transmission error when one servo motor drives two wire drawing rollers through chain drive or belt drive, and effectively improve the wire drawing accuracy. Among them, the wire drawing servo motor is detachably mounted on the support plate through a bolt fastening assembly, and the output end of the wire drawing servo motor is detachably connected to the wire drawing roller through a sealing flange with a bolt assembly. Here, the wire drawing roller is made of ceramic material or sprayed with ceramic on the surface, and the hardness is higher than 400HV. It can effectively improve the wear resistance of the wire drawing roller, extend the service life of the wire drawing roller, and reduce the wear on the wire material.

[0035] The first wire drawing die assembly 303 is arranged corresponding to the first wire drawing roller 301 and the second wire drawing roller 302. The first wire drawing die assembly 303 is located between the first wire drawing roller 301 and the second wire drawing roller 302, and the first wire drawing die is installed on the side plate close to the flower moistening liquid tank where the second wire drawing die is installed. There are n (n is a positive integer) wire drawing dies evenly distributed on the first wire drawing die assembly 303, and the axis of the wire hole of each wire drawing die in the first wire drawing die assembly 303 is tangent to the first wire drawing roller 301 and the second wire drawing roller 302 in the vertical direction. Furthermore, the metal wire to be drawn released by the pay-off unit 100 passes downward from the top of the first wire drawing roller 301 through the wire drawing die on the first wire drawing die assembly 303, is then wound upward from the bottom of the second wire drawing roller 302, and is successively wound n times between the first wire drawing roller 301, n wire drawing dies and the second wire drawing roller 302. Furthermore, the metal wire to be drawn released by the pay-off unit 100 is subjected to n preliminary wire drawing passes through the first wire drawing roller 301, the second wire drawing roller 302 and the first wire drawing die assembly 303.

[0036] The second wire drawing die assembly 306 is located between the first wire drawing roller 301 and the third wire drawing roller 308. The axis of the wire drawing die in the second wire drawing die assembly 306 is tangent to the first wire drawing roller 301 and the third wire drawing roller 308 in the horizontal direction. The second wire drawing die assembly 306 is installed on the inner side of the side plate of the lubricating liquid tank 307 between the first wire drawing roller 301 and the third wire drawing roller 308. A wire drawing die is installed in the second wire drawing die assembly 306. After the metal wire is subjected to n passes of preliminary wire drawing, it passes horizontally from the top of the first wire drawing roller 301 into the wire drawing die in the second wire drawing die assembly 306. Then, the metal wire after preliminary wire drawing is subjected to a single pass of secondary wire drawing through the third wire drawing roller 308, the first wire drawing roller 301 and the second wire drawing die assembly 306. The metal wire passing through the drawing die of the second drawing die assembly 306 is wound around the third drawing roller 308 for one circle, and then the drawn metal wire is collected by the wire taking-up unit 400 .

[0037] In the embodiment of the present application, the die frame in the first wire drawing die assembly 303 is installed on a support plate, and n die placement holes are provided on the die frame, and wire drawing dies with gradually decreasing wire drawing sizes along the length direction of the die frame are respectively installed in the n die placement holes, and the axis of the wire passing hole of each wire drawing die coincides with the direction of the metal wire material passing the surface tangent of the first wire drawing roller 301 and the second wire drawing roller 302. In other words, the axis of the wire passing holes of the n wire drawing dies in the first wire drawing die assembly 303 coincides with the surface tangent of the first wire drawing roller 301 and the second wire drawing roller 302, and is located on the same side of the first wire drawing roller 301 and the second wire drawing roller 302.

[0038] Thereby, when the metal wire is wound between the first wire drawing roller 301 and the second wire drawing roller 302, it can be wound in and out along the tangent direction of the first wire drawing roller 301 and the second wire drawing roller 302, and face the wire passing hole of the wire drawing die in the first wire drawing die assembly 303, thereby effectively avoiding friction and wear between the metal wire and the wire drawing die, effectively reducing the wire breakage rate, and improving the wire drawing efficiency and quality. At the same time, the first wire drawing roller 301 and the second wire drawing roller 302 are arranged in parallel in the vertical direction, so that when the metal wire is wound between the first wire drawing roller 301 and the second wire drawing roller 302 for multiple times during the wire drawing process, it can pass through the center of multiple wire drawing dies in the first wire drawing die assembly 303. This effectively solves the problem that when the first wire drawing roller 301 and the second wire drawing roller 302 are arranged horizontally, the wire drawing die assembly is deformed after long-term work, which may cause the wire drawing die to deviate from the drawn metal wire under the action of strain, thereby causing the metal wire to break during the wire drawing process, further reducing the wire drawing breakage rate.

[0039] The second wire drawing die assembly 306 is installed on the inner side of the side plate of the lubricating liquid tank 307. After the metal wire is subjected to n passes of preliminary wire drawing, it enters the second wire drawing die assembly 306 along the length direction of the wire drawing platform. The size of the wire drawing die installed in the second wire drawing die assembly 306 is smaller than the size of the smallest wire drawing die in the first wire drawing die assembly 303, thereby achieving a single-pass re-drawing of the metal wire after n passes of preliminary wire drawing, thereby further reducing the size of the wire.

[0040] During the wire drawing process, driven by the pumping unit installed in the lubricating liquid tank 307, the lubricating liquid in the lubricating liquid tank 307 is sprayed to the center of the wire drawing die through the first lubricating liquid pipe 304 matched with the first wire drawing die assembly 303 and the second lubricating liquid pipe 305 matched with the second wire drawing die assembly 306. The first lubricating liquid pipe 304 is arranged in parallel with the die frame, and a plurality of lubricating liquid nozzles are arranged along the length direction. The plurality of lubricating liquid nozzles are respectively facing the centers of the wire holes of the plurality of wire drawing dies in the first wire drawing die assembly 303, so as to spray the lubricating liquid in the lubricating liquid tank 307 to the centers of the plurality of wire drawing dies in the first wire drawing die assembly 303. The second lubricating liquid pipe 305 is provided with a lubricating liquid nozzle facing the centers of the wire holes of the wire drawing dies installed in the second wire drawing die assembly 306, so as to spray the lubricating liquid in the lubricating liquid tank 307 to the centers of the wire drawing dies in the second wire drawing die assembly 306.

[0041] In a specific example, the first lubricating liquid tube 304 is detachably mounted on a support plate parallel to the die frame of the first wire drawing die assembly 303, and is connected to a pumping unit; a plurality of lubricating liquid nozzles are arranged along the length direction of the first lubricating liquid tube 304, and each lubricating liquid nozzle is directly facing the center of the wire hole of a wire drawing die, so that under the action of the pumping unit, the lubricating liquid in the lubricating liquid tank 307 is sprayed to the center of the wire drawing die, so as to lubricate and cool the metal wire passing through the center of the wire drawing die during the wire drawing process, further reduce the wire breakage rate, and improve the wire drawing quality and efficiency.

[0042] The second lubricating liquid pipe 305 is installed on the lubricating liquid side plate of the second wire drawing die assembly 306, and there is only one lubricating liquid nozzle on the second lubricating liquid pipe 305, and the lubricating liquid nozzle is directly facing the center of the wire drawing die in the second wire drawing die assembly 306. Among them, there is only one die placement hole in the die frame of the second wire drawing die assembly 306, and the die placement hole is used to install a wire drawing die; and the die frame of the second wire drawing die assembly 306 is detachably connected to the side plate of the lubricating liquid tank 307, or is an integrated structure.

[0043] In the embodiment of the present application, the wire-releasing unit 100 and the wire-receiving unit 400 are respectively arranged on both sides of the wire-drawing unit 300, and the wire-releasing unit 100 releases the metal wire to be drawn to the wire-drawing unit 300, and the wire-receiving unit 400 receives the metal wire drawn by the wire-drawing unit 300. A servo tension mechanism 200 is arranged between the wire-releasing unit 100 and the wire-drawing unit 300, and between the wire-drawing unit 300 and the wire-receiving unit 400 to tension the metal wire entering and exiting the wire-drawing unit 300.

[0044] The pay-off unit 100 automatically adjusts the pay-off speed of the metal wire to pay-off. The pay-off reel is detachably mounted on the pay-off shaft, and the pay-off shaft is driven by a pay-off servo motor mounted on a support plate, thereby driving the pay-off reel to rotate. After the metal wire is paid out from the pay-off reel, it enters the servo tension mechanism 200, and the servo tension mechanism 200 automatically adjusts the tension of the metal wire.

[0045] Among them, in the servo tension mechanism 200, the wire wheel of the tension sensor is fixed on the guide wheel shaft through a bearing and a nut, the guide wheel shaft is threadedly connected to one end of the tension rod, the tension rod is fixed to the tension servo motor of the tension sensor through a nut, and the tension servo motor is fixed to the wire drawing platform through a support rod by bolts. The metal wire wire coming out of the pay-off reel bypasses the wire wheel, drives the tension rod to swing, and adjusts the tension of the metal wire wire, and then effectively ensures that the tension on the metal wire wire remains constant through tension adjustment. For example, when the pay-off speed is lower than the speed of the equilibrium state at a certain moment, and the take-up speed is constant, the tension on the metal wire wire will increase, and then the metal wire wire pulls the wire wheel upward, drives the swing angle of the tension rod to increase, and the pay-off speed increases, thereby reducing the tension on the metal wire wire; when the pay-off speed increases to a certain extent, the tension on the metal wire wire becomes smaller than the set tension, the wire wheel moves downward, drives the swing angle of the tension rod to decrease, and the pay-off speed decreases, thereby increasing the tension on the metal wire wire. Thereby, the tension rod is driven to swing by the metal wire, the wire-releasing speed is adjusted, and then the tension on the metal wire is adaptively adjusted.

[0046] In a specific example, in the servo tension mechanism 200, the tension sensor is rotatably mounted on the support plate, one end of the tension rod is connected to the tension sensor, and the other end is rotatably mounted on the wire pulley. During the wire-paying process, when the wire-paying speed is fast, the wire pulley will move downward under the action of its own weight, and then drive the tension sensor to rotate clockwise through the tension rod, and the tension sensor sends a rotation electrical signal to the programmable logic controller, which controls the rotation speed of the wire-paying servo motor driving the wire-paying shaft to tighten the wire-paying speed; when the wire-paying speed is slow, the metal wire will tighten, driving the wire pulley to move upward, and then driving the tension sensor to rotate counterclockwise through the tension rod, and the tension sensor sends a rotation electrical signal to the programmable logic controller, which drives the rotation speed of the wire-paying servo motor driving the wire-paying shaft to keep the wire-paying speed consistent with the wire drawing speed.

[0047] The wire pulley is made of ABS plastic and has weight-reducing holes on the web to reduce the weight of the wire pulley and reduce the moment of inertia. At the same time, the guide groove of the wire pulley is V-shaped to ensure that the metal wire can be located in the center position. The tension rod is made of ultra-light materials such as carbon fiber or titanium alloy to reduce the weight of the tension rod and improve the force transmission sensitivity of the tension rod.

[0048] After the metal wire is drawn by the wire drawing unit 300, it is reeled by the wire taking-up unit 400. A servo tension mechanism 200 is also provided between the wire drawing unit 300 and the wire taking-up unit 400 for automatically adjusting the wire taking-up speed of the metal wire. Here, the servo tension mechanism 200 between the wire paying-off unit 100 and the wire drawing unit 300 and the servo tension mechanism 200 between the wire drawing unit 300 and the wire taking-up unit 400 have similar structures and the same working principles, and are not described one by one here. Thus, the wire paying-off and wire taking-up speeds of the metal wire are controlled by the servo tension mechanism 200 before and after the wire drawing, so as to achieve uniformity and stability of the metal wire during the wire drawing process.

[0049] After the wire drawing device is powered on, the drawn metal wire is fixed on the pay-off shaft through the pay-off reel, and at the same time, the head of the metal wire to be drawn is placed in the wire sizing groove for reducing the diameter; then, the reduced metal wire is wound on the first wire drawing roller 301 close to the pay-off unit 100 through the pay-off guide wheel, and then passed through the drawing die in the first wire drawing die assembly 303, and then wound on the second wire drawing roller 302, and then wound back to the first wire drawing roller from the other side of the second wire drawing roller 302. The roller 301 circulates in sequence, and after being wound n times between the first wire drawing roller 301, the first wire drawing die assembly 303, and the second wire drawing roller 302, it enters the second wire drawing die assembly 306 from above the second wire drawing roller 302 in a horizontal direction, and after passing through the second wire drawing die assembly, it is wound around the third wire drawing roller 308 for one circle, enters the tension servo mechanism arranged near the wire taking-up drum, and then is wound onto the wire taking-up drum of the wire taking-up unit 400; finally, the equipment is started to start wire drawing.

[0050] Thus, the first wire drawing die assembly 303 between the first wire drawing roller 301 and the second wire drawing roller 302 performs multiple preliminary wire drawing on the metal wire released by the wire release unit 100, effectively improving the wire drawing efficiency of the ultra-fine metal wire, reducing the wire breakage rate and wire drawing cost, and achieving good wire drawing uniformity and stable surface reduction rate; the double roller design of the first wire drawing roller 301 and the second wire drawing roller 302 increases the slip coefficient, reduces the wire breakage rate, and ensures the long length drawing of the metal wire; the second wire drawing die assembly 306 between the first wire drawing roller 301 and the third wire drawing roller 308 performs a single-pass secondary wire drawing on the metal wire that has undergone preliminary wire drawing, thereby realizing the re-drawing of the metal wire that has undergone multiple preliminary wire drawing passes, and further reducing the wire drawing size. The parallel arrangement of the three wire drawing rollers and the double wire drawing die assembly in the vertical direction and the horizontal direction makes the structure of the wire drawing unit 300 more compact, better stable, and effectively reduces the wire drawing cost.

[0051] At the same time, the first wire drawing roller 301 and the second wire drawing roller 302 are arranged in parallel in the vertical direction, so that when the metal wire is wound between the first wire drawing roller 301 and the second wire drawing roller 302 for multiple times during the wire drawing process, it can pass through the center of multiple wire drawing dies in the first wire drawing die assembly 303, which effectively solves the problem that when the first wire drawing roller 301 and the second wire drawing roller 302 are arranged horizontally, the wire drawing die assembly is deformed after long-term work, which may cause the wire drawing die to deviate from the drawn metal wire under the action of strain, thereby causing the metal wire to break during the wire drawing process.

[0052] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0053] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0054] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0056] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0057] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A highly straight and ultra-fine metal wire drawing device, characterized in that: include: A wire drawing unit, a wire unwinding unit and a wire taking-up unit, wherein the wire unwinding unit and the wire taking-up unit are respectively arranged on both sides of the wire drawing unit, wherein the wire unwinding unit is used to release the metal wire to be drawn to the wire drawing unit, and the wire taking-up unit is used to take in the metal wire after being drawn by the wire drawing unit; The wire drawing unit is used for drawing metal wires, and comprises: a lubricating liquid tank, a first wire drawing roller, a second wire drawing roller, a third wire drawing roller, a first wire drawing die assembly and a second wire drawing die assembly; The lubricating liquid tank is filled with lubricating liquid, which is used to lubricate and cool the metal wire during the wire drawing process; The first wire drawing roller and the second wire drawing roller are arranged in parallel above the lubricating liquid tank in the height direction; the third wire drawing roller is located on the outside of the lubricating liquid tank, and is arranged in parallel with the first wire drawing roller in the horizontal direction; the first wire drawing roller, the second wire drawing roller and the first wire drawing die assembly perform multiple passes of preliminary wire drawing on the metal wire to be drawn released by the wire release unit, and the third wire drawing roller, the first wire drawing roller and the second wire drawing die assembly perform a single pass of secondary wire drawing on the metal wire after the preliminary wire drawing; The first wire drawing die assembly is located between the first wire drawing roller and the second wire drawing roller, the second wire drawing die assembly is located between the first wire drawing roller and the third wire drawing roller, and wire drawing dies are installed in the first wire drawing die assembly and the second wire drawing die assembly; wherein, the axis of the wire passing hole of each wire drawing die in the first wire drawing die assembly is tangent to the first wire drawing roller and the second wire drawing roller in the vertical direction; the axis of the wire passing hole of the wire drawing die in the second wire drawing die assembly is tangent to the first wire drawing roller and the third wire drawing roller in the horizontal direction.

2. The high straightness ultra-fine metal wire drawing device according to claim 1, characterized in that: The second wire drawing die assembly is installed on the inner side of the side plate of the lubricating liquid tank, and the first wire drawing die is installed on the side plate close to the lubricating liquid tank where the second wire drawing die is installed.

3. The high straightness ultra-fine metal wire drawing device according to claim 2, characterized in that: There are n wire drawing dies evenly distributed on the first wire drawing die assembly. Correspondingly, the metal wire to be drawn released by the wire-releasing unit passes downward from the top of the first wire drawing roller through the wire drawing die on the first wire drawing die assembly, is then wound upward from the bottom of the second wire drawing roller, and is successively wound n times between the first wire drawing roller, the n wire drawing dies and the second wire drawing roller, and then is passed horizontally from the top of the first wire drawing roller into the wire drawing die in the second wire drawing die assembly; wherein n is a positive integer.

4. The high straightness ultra-fine metal wire drawing device according to claim 3, characterized in that: A wire drawing die is installed in the second wire drawing die assembly. Correspondingly, the metal wire passing through the wire drawing die of the second wire drawing die assembly is wound around the third wire drawing roller for one circle and then the metal wire is collected by the wire taking-up unit after being drawn.

5. The high straightness ultra-fine metal wire drawing device according to claim 4, characterized in that: The first wire drawing die assembly comprises: a die frame and the wire drawing die, wherein the die frame is provided with a plurality of die placement holes along the length direction, and the plurality of die placement holes are respectively provided with the wire drawing dies whose wire drawing sizes gradually decrease along the length direction of the die frame; The size of the wire drawing die in the second wire drawing die assembly is smaller than the size of the smallest wire drawing die in the first wire drawing die assembly.

6. The high straightness ultra-fine metal wire drawing device according to claim 1, characterized in that: A first lubricating liquid pipe is provided in conjunction with the first wire drawing die assembly. The first lubricating liquid pipe is arranged in parallel with the die frame, and a plurality of lubricating liquid nozzles are arranged along the length direction. The plurality of lubricating liquid nozzles are respectively and respectively facing the centers of the wire passing holes of the plurality of wire drawing dies in the first wire drawing die assembly, so as to spray the lubricating liquid in the lubricating liquid tank to the centers of the plurality of wire drawing dies in the first wire drawing die assembly; a second lubricating liquid pipe is provided in conjunction with the second wire drawing die assembly, and the lubricating liquid nozzle is provided in the second lubricating liquid pipe facing the centers of the wire passing holes of the wire drawing dies installed in the second wire drawing die assembly, so as to spray the lubricating liquid in the lubricating liquid tank to the centers of the wire drawing dies in the second wire drawing die assembly.

7. The high straightness ultra-fine metal wire drawing device according to claim 1, characterized in that: The first wire drawing roller, the second wire drawing roller, and the third wire drawing roller are independently driven by separate servo motors.

8. The high straightness ultra-fine metal wire drawing device according to claim 1, characterized in that: The first wire drawing roller, the second wire drawing roller, and the third wire drawing roller are made of ceramic or have ceramic sprayed on the surface, and have a hardness higher than 400 HV.

9. The high straightness ultra-fine metal wire drawing device according to claim 1, characterized in that: A servo tension mechanism is provided between the wire drawing unit and the wire unwinding unit, and between the wire drawing unit and the wire taking-up unit, so as to tension the metal wire material entering and exiting the wire drawing unit.

Images