Wire drawing system with pay-off power and tungsten filament cold drawing method

Abstract

The invention relates to a wire drawing system with pay-off power and a tungsten filament cold drawing method, the wire drawing system comprises a pay-off machine, a wire drawing machine and a take-up machine, the pay-off machine comprises a rack adjustably arranged on one side wall of the wire drawing machine, and a pay-off device, a guide device and a tension device which are arranged on the rack; the pay-off device comprises a pay-off motor and a clamping mechanism, and a pay-off wheel wound with a wire is detachably arranged on the clamping mechanism; the guide device comprises a guide piece I with a guide wheel and a guide piece II with two guide wheels; the tension device comprises a tension wheel arranged on the rack in an up-down swinging mode and a sensor used for monitoring the swinging angle of the tension wheel. And a wire on the pay-off wheel is led out to sequentially wind the guide wheel on the first guide piece, one guide wheel on the second guide piece, the tension wheel, the other guide wheel on the second guide piece and the other guide wheel, and then is led into the wire drawing machine. The wire drawing machine can actively pay off wires, and the pay-off machine, the wire drawing machine and the take-up machine are in linkage fit, so that stable drawing of superfine wires can be realized.

Description

Technical Field

[0001] The invention relates to the technical field of wire drawing, in particular to a wire drawing system with self-contained wire-releasing power and a tungsten wire cold drawing method. Background Art

[0002] The drawing of high, medium and low carbon steel wires usually adopts a tower wheel type water tank wire drawing machine, which can produce steel wires with different wire diameters. The equipment usually consists of a wire pay-off frame, a wire drawing machine and a wire take-up machine. The wire drawing machine is arranged with multiple tower wheels and molds arranged in a certain pattern. Chains or belts are used to drive the tower wheels, and the synchronous operation of the tower wheels is achieved by a motor. An I-shaped wheel with steel wire is arranged on the wire pay-off frame. The steel wire is introduced into the wire drawing machine, shuttles back and forth between different tower wheels, and passes through the mold, thereby realizing the drawing operation of the wire. For example, the multi-pass drawing high-speed water tank wire drawing machine disclosed in patent publication number CN2925663Y includes a frame, a wire feeding mechanism installed on the left side of the frame, a wire take-up mechanism installed on the right side of the frame, and others.

[0003] After multiple continuous drawing passes, the steel wire can be drawn and formed in one step, and finally wound up by the wire take-up machine. The cooling of the mold and the tower wheel is immersed, that is, immersed in the coolant. Similarly, the running steel wire is also placed in the coolant. The above-mentioned drawing equipment is released by the running tower wheel actively pulling the steel wire on the pay-off stand, that is, the I-shaped wheel on the pay-off stand is a passive rotating pay-off. Since the steel wire is thicker in diameter and can resist the drawing force of the wire drawing equipment without breaking, the steel wire can be passively released. However, for some wires with thinner wire diameters, passive release and pulling out can easily lead to wire breakage, which requires the wire to be actively released and cooperate with the active operation of the tower wheel.

[0004] Tungsten diamond wire has high temperature resistance, corrosion resistance, high strength, low wire breakage rate and high-precision cutting ability, which is the basis for ensuring the stable, reliable and efficient operation of cutting equipment. At present, the core link of tungsten diamond wire production is the tungsten wire matrix manufacturing process. Tungsten wire adopts hot drawing in the conventional drawing process. Hot drawing is to heat the tungsten wire and pass it through the die to draw it step by step, so as to gradually reduce the tungsten wire diameter and finally reach the target wire diameter. The hot drawing process will cause the internal structure of the tungsten wire to change, resulting in reduced mechanical properties.

[0005] Not only that, hot drawing also makes it difficult to maintain consistency in the hot drawing process between tungsten wires, resulting in unstable quality of tungsten wire busbars and low production efficiency. The surface of tungsten wire in long-term contact with air is easily oxidized, resulting in poor firmness of subsequent coating, and the coating is prone to fall off during cutting, affecting cutting efficiency and cutting quality. Moreover, for tungsten wire with too fine wire diameter, the hot drawing process causes the stress of tungsten wire to decrease, and then the strength of tungsten wire decreases and the service life is shortened. For example, for tungsten wire with a wire diameter of 60μm and a wire diameter of 32μm, the hot drawing process cannot be used for production, and conventional wire drawing machines are also difficult to meet production requirements. Summary of the invention

[0006] In order to solve the problem that conventional wire drawing equipment is difficult to draw over-thin tungsten wires, the present invention provides a wire drawing system with self-contained wire pay-off power and a tungsten wire cold drawing method. A wire pay-off machine is made on the basis of a wire drawing machine, which can realize active wire pay-off of the tungsten wire, and cooperate with the active traction of the wire drawing machine to realize the drawing of the tungsten wire. At the same time, the drawing process is optimized, the performance of the tungsten wire after drawing is guaranteed, and the production requirements of tungsten wires below 32μm are met.

[0007] To achieve the above object, the technical solution adopted by the present invention is: The wire drawing system with its own wire-paying power includes a wire-paying machine, a wire-drawing machine and a wire-receiving machine. The wire drawn out from the wire-paying machine is wound around the wire-drawing machine and then reeled up on the wire-receiving machine. The wire-paying machine includes a frame that is adjustably arranged on a side wall of the wire-drawing machine and a wire-paying device, a guiding device and a tension device arranged on the frame, so that the position of the frame can be adjusted conveniently, and then the three devices move together with the frame; A strip hole for wire entry is provided on one side wall of the wire drawing machine, which facilitates the horizontal movement of the wire in the strip hole and matches different molds. The frame moves horizontally and linearly within the range of the strip hole, changing the position of the entire wire unwinding machine. A guide wheel is adjustable on one side wall of the wire drawing machine, and the guide wheel corresponds to the strip hole, which facilitates guiding the wire to accurately enter the strip hole. The pay-off device includes a pay-off motor and a clamping mechanism controlled by the pay-off motor, which is convenient for driving the clamping mechanism to operate. The clamping mechanism is detachably provided with a pay-off wheel wound with wire, and the clamping mechanism is convenient for driving the pay-off wheel to operate together. The clamping mechanism can be adapted to pay-off wheels of different length specifications; The guide device comprises a guide member 1 with a guide wheel and a guide member 2 with two guide wheels, wherein the guide member 1 is arranged above the pay-off wheel, and the guide member 2 is arranged between the pay-off wheel and the guide member 1, and the guide member 1 and the guide member 2 are arranged in an up-down staggered manner; The tension device includes a tension wheel that swings up and down on the frame and a sensor for monitoring the swing angle of the tension wheel. The tension wheel is arranged below the second guide member. The sensor is connected to the pay-off motor, the wire drawing machine and the wire taking-up machine through a frequency converter, so as to realize the linkage control of the three machines. That is, the sensor is connected to the frequency converter, and the frequency converter is respectively connected to the pay-off motor, the wire drawing machine and the wire taking-up machine. The sensor monitors the signal and transmits it to the frequency converter, and the frequency converter controls the start-up and running speed of the pay-off motor, the wire drawing machine and the wire taking-up machine. The wire on the pay-off wheel is led out and sequentially wound around the guide wheel on guide member 1, a guide wheel on guide member 2, the tension wheel, another guide wheel on guide member 2 and the guide wheel, and then introduced into the wire drawing machine, so that the wire can be wound along a certain path on the pay-off machine.

[0008] Furthermore, the strip-shaped holes are arranged horizontally, a mounting seat is bolted to one side wall of the wire drawing machine, an adjusting vertical hole is opened on the mounting seat, the bolt passes through the adjusting vertical hole and is threadedly connected to the side wall of the wire drawing machine, and the mounting seat slides up and down along the side wall of the wire drawing machine, so as to facilitate the adjustment of the height position of the mounting seat; The mounting seat is provided with a mounting shaft, the axial direction of the mounting shaft is consistent with the length direction of the strip hole, the guide wheel is rotatably arranged on the mounting shaft, which improves the smooth operation of the guide wheel, and the guide wheel is movably arranged along the axial direction of the mounting shaft, which facilitates the movement of the guide wheel on the mounting shaft, and the guide wheel moves horizontally and linearly within the range of the strip hole.

[0009] Furthermore, a fixing plate is provided on one side wall of the wire drawing machine, and the fixing plate is arranged below the strip-shaped hole at intervals; The frame is narrow at one end and wide at the other end, the narrow end of the frame fits the fixing plate, an adjusting transverse hole is opened on the narrow end of the frame, the frame is connected and fixed to the fixing plate by bolts, the bolts pass through the adjusting transverse holes and are threadedly connected to the fixing plate, which facilitates the lateral movement of the frame, and an adjusting bolt for adjusting the horizontal position of the frame is also arranged between the fixing plate and the narrow end of the frame, the adjusting bolt is rotatably arranged on the fixing plate, the adjusting bolt is threadedly connected to the narrow end of the frame, and the frame is driven to move by the adjusting bolt.

[0010] Furthermore, the clamping mechanism includes a pay-off shaft, a clamping disc and a clamping nut. The pay-off shaft is rotatably arranged on one side of the frame through a bearing seat, and the pay-off motor is arranged on the other side of the frame. The pay-off motor is a servo motor. A coupling is arranged between the pay-off motor and the pay-off shaft to facilitate the transmission of power. The pay-off shaft is provided with two clamping disks which are symmetrically arranged, and the pay-off wheel is arranged between the two clamping disks to facilitate the bearing and support of the pay-off wheel. The pay-off wheel is sleeved on the pay-off shaft, and the clamping nut is threadedly connected to the end of the pay-off shaft, and the clamping nut is tightly against an end face of a clamping disk to prevent the pay-off wheel from detaching.

[0011] Furthermore, the guide member 1 and the guide member 2 both include a guide shaft, a mounting plate and a limit ring, the mounting plate is provided at one end of the guide shaft, the mounting plate is bolted to the frame, the guide shaft is fixedly connected to the frame through the mounting plate, the guide shaft is provided with two limit rings for limiting the position of the guide wheel, the limit ring is passed through the guide shaft, the limit screw is threadedly connected to the limit ring, the limit screw radially passes through the limit ring and is tightly pressed against the guide shaft, thereby facilitating the fixation of the limit ring, and the axial direction of the guide shaft is consistent with the axial direction of the pay-off wheel.

[0012] Furthermore, the connecting line between the guide shafts in guide member one and guide member two and the pay-off wheel is in the shape of a triangle, the guide shaft spacing A between guide member two and guide member one is smaller than the spacing B between the guide shaft of guide member one and the pay-off wheel, the connecting line between the guide shaft of guide member one and the pay-off wheel forms an angle C with the connecting line between the guide shafts of guide member one and guide member two, and the angle C ranges from 55-65°.

[0013] Further, the guide wheel on the guide member 1 is guide wheel 1, and the guide wheel 1 is rotatably arranged on the guide shaft, and two limit rings cooperate to clamp the guide wheel 1, so as to facilitate the fixing of the position of the guide wheel 1; The two guide wheels on the guide member 2 are respectively an inner guide wheel 2 and an outer guide wheel 2. The inner guide wheel 2 and the outer guide wheel 2 are rotatably arranged in parallel on the guide shaft, and two limit rings cooperate to clamp the inner guide wheel 2 and the outer guide wheel 2.

[0014] Furthermore, the guide wheel 1 corresponds to the middle part of the pay-off wheel in the upper and lower parts, and the connecting line between the guide wheel 1 and the two ends of the pay-off wheel is arranged in an isosceles triangle, so as to prevent the wire from contacting the wheel edge of the guide wheel 1 and causing the coating on the surface of the wire to wear and fall off; The first guide wheel and the second inner guide wheel are arranged on the same vertical plane, and the second outer guide wheel, the tension wheel and the guide wheel are arranged on the same vertical plane; The wire on the pay-off wheel is led out and sequentially passed through the first guide wheel, the second inner guide wheel, the tension wheel, the second outer guide wheel and the guide wheel, and then introduced into the wire drawing machine.

[0015] Furthermore, the tension device further comprises a mounting rod, a tension rod and an eccentric wheel, wherein the mounting rod is rotatably connected to the frame through a bearing seat, the mounting rod passes through the bearing seat, the axial direction of the mounting rod is consistent with the axial direction of the pay-off wheel, the eccentric wheel is arranged at one end of the mounting rod to facilitate the rotation of the eccentric wheel, the sensor is also arranged on the frame, the sensor points to the eccentric wheel, and the rotation of the eccentric wheel can be monitored, the tension rod is arranged at the other end of the mounting rod, the tension rod is arranged perpendicular to the mounting rod, and the tension wheel is rotatably arranged at the end of the tension rod; The frame is also provided with limit cylinders spaced apart from each other up and down. The tension rod is located between the two limit cylinders and swings up and down. The swing center of the tension rod and the line between the two limit cylinders form an angle D, and the range of the angle D is 30-60°.

[0016] The tungsten wire cold drawing method, based on the above-mentioned wire drawing system with self-feeding power, includes the following steps: Step 1, loading: The nickel-plated and brass-plated tungsten wire is wound on the pay-off wheel, which is installed on the pay-off shaft. The end of the tungsten wire is led out and wound through the guide wheel 1, the inner guide wheel 2, the tension wheel, the outer guide wheel 2 and the guide wheel in sequence, and then passed into the wire drawing machine through the strip hole. It is wound between the corresponding tower wheel and the die according to the drawing requirements, and finally the tungsten wire is wound on the take-up machine; Step 2, adding lubricant: add lubricant to the wire drawing machine, immerse the die and the tower wheel in it, the lubricant temperature is 40±2℃, the pH value is 8.0-8.8, the refractive index is 4.5-6.0, the positive divalent copper ion is 600±300ppm, the positive divalent zinc ion is 300±200ppm, and the fatty acid is ≥3500ppm; Step 3, drawing: Use a tower wheel water tank wire drawing machine to draw the tungsten wire, the drawing speed is 5~7 m / s, the drawing passes are 10~13 times, and the single-pass compression rate is 2~15%, until the tungsten wire of the required wire diameter is drawn; during the drawing, the running speed of the wire pay-off motor, wire drawing machine and wire take-up machine is automatically adjusted according to the tension of the tungsten wire.

[0017] Through the above technical solution, the beneficial effects of the present invention are: The present invention has a reasonable structural design. On the basis of the existing tower wheel type water tank wire drawing machine, the wire release measures are optimized and modified, and a wire release machine with its own power and active wire release is proposed to actively transmit the wire into the wire drawing machine. The wire release machine is installed on the side wall of the wire drawing machine, has a compact structure, does not occupy too much production space, and the installation position of the wire release machine is adjustable. At the same time, a strip hole for feeding the wire is opened on the side wall of the wire drawing machine, and the wire release machine can be installed at different positions corresponding to the strip hole, and can be flexibly moved according to the wire specifications, and then the corresponding mold can be selected for drawing, and the operation and use are flexible.

[0018] The guide wheel 1 of the present invention is far away from the pay-off wheel, and the guide wheel 1 is located in the middle of the pay-off wheel, that is, the distance between the guide wheel 1 and the two ends of the pay-off wheel is equal. In this way, when the pay-off wheel is paying off the wire, the wire will swing back and forth on the pay-off wheel, but the wire will not contact the edge of the guide wheel 1, and will not produce friction with the edge of the guide wheel 1, which can prevent the coating on the surface of the wire from falling off. The spacing between the clamping discs is adjustable, which is convenient for installing pay-off wheels of different lengths and specifications. At the same time, the position of the guide wheel 1 on the guide shaft can be adjusted, so that the guide wheel 1 can be always arranged in the middle of the pay-off wheel.

[0019] The tension rod in the tension device of the present invention can drive the tension wheel to swing up and down, and the problem of uneven tension during wire release can be improved through the swing, ensuring the basic stability of the wire release tension, and prompting the wire to maintain the best tension during wire release. The up and down swing of the tension rod will be converted into the rotational movement of the mounting rod, which will drive the eccentric wheel to rotate. The sensor monitors the rotation of the eccentric wheel, and then controls the operating speed of the wire release machine, wire drawing machine and wire take-up machine in a linked manner, so as to facilitate the real-time adjustment of the equipment operating speed according to the wire tension and ensure the constant tension. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front view of the wire drawing system with its own wire-releasing power of the present invention, and the arrow in the figure indicates the wire winding path.

[0021] Figure 2 It is a rear view of the wire drawing system with its own wire-releasing power of the present invention. The wire is not shown in the figure, so the tension rod falls naturally and the tension wheel is shown.

[0022] Figure 3 It is a top view of the wire drawing system with its own wire-paying power of the present invention.

[0023] Figure 4 The invention is a wire drawing system with self-contained wire release power. Figure 3 AA to rack installation cross-sectional view.

[0024] Figure 5 It is a cross-sectional view of a pay-off device of a wire drawing system with its own pay-off power according to the present invention, in which the pay-off wheel is omitted.

[0025] Figure 6 It is a schematic diagram of the tension device of the wire drawing system with its own wire-releasing power of the present invention.

[0026] Figure 7 It is a schematic diagram of the installation of the tension rod of the wire drawing system with its own wire-releasing power of the present invention.

[0027] Figure 8 It is a process parameter diagram of 0.0300mm tungsten wire drawing in the tungsten wire cold drawing method of the present invention.

[0028] Fig. 9 This is a process parameter diagram for drawing a 0.0320 mm tungsten wire in the tungsten wire cold drawing method of the present invention.

[0029] The numbers in the accompanying drawings are: 1 pay-off machine, 2 wire drawing machine, 3 frame, 4 strip hole, 5 fixing plate, 6 adjusting horizontal hole, 7 adjusting bolt, 8 nut, 9 pay-off motor, 10 clamping mechanism, 101 pay-off shaft, 102 clamping disk, 103 clamping nut, 11 coupling, 12 positioning disk, 13 pay-off wheel, 14 guide one, 141 guide shaft, 142 mounting disk, 143 limiting ring, 15 guide two, 16 limiting screw, 17 guide wheel one, 18 inner guide wheel two, 19 outer guide wheel two, 20 tension wheel, 21 sensor, 22 mounting rod, 23 tension rod, 24 eccentric wheel, 25 mounting block, 26 mounting bolt, 27 limiting cylinder, 28 guide wheel, 29 mounting seat, 30 adjusting vertical hole, 31 mounting shaft. DETAILED DESCRIPTION

[0030] The specific implementation of the present invention is described in detail below with reference to the accompanying drawings: like Figure 1 to Figure 7 As shown, the wire drawing system with self-powered wire release includes a wire release machine 1, a wire drawing machine 2 and a wire take-up machine. The wire drawing machine 2 is a tower wheel type water tank wire drawing machine. The wire drawn by the wire release machine 1 is wound around the wire drawing machine 2 and then wound on the wire take-up machine. The wire release machine 1 realizes automatic wire release, the wire drawing machine 2 is used to perform multiple-pass drawing on the wire, and the wire take-up machine is used to take up and arrange the wire that has reached the required wire diameter after drawing, so as to complete the wire drawing work. The wire take-up machine is not shown in the figure.

[0031] In this embodiment, the pay-off machine 1 is installed on the side wall of the wire drawing machine 2, which can save space in the production site and does not affect the normal operation of other production equipment. The operation is more convenient and the operation space is large. The pay-off machine 1 includes a frame 3 that is adjustable and arranged on the side wall of the wire drawing machine 2, and a pay-off device, a guide device and a tension device arranged on the frame 3, such as Figure 1 and Figure 2 As shown. The position of the frame 3 is adjustable, and the pay-off device, the guide device and the tension device move with the frame 3. Due to the different wire specifications of the incoming wires and the different wire specifications required, the pay-off machine 1 can be moved to match the dies at different positions in the wire drawing machine 2.

[0032] A strip hole 4 for wire entry is provided on one side wall of the wire drawing machine 2. The strip hole 4 is arranged horizontally to provide a certain space for the wire to pass through. The frame 3 moves horizontally and linearly within the range of the strip hole 4, and then the wire drawn from the wire pay-off machine 1 passes through the strip hole 4 and enters the wire drawing machine 2. The wire can move horizontally within the range of the strip hole 4.

[0033] When the frame 3 is installed, a fixing plate 5 is provided on one side wall of the wire drawing machine 2. The fixing plate 5 is fixed by welding, and the fixing plate 5 is arranged at intervals below the strip hole 4. One end of the frame 3 is narrow and the other end is wide. The narrow end of the frame 3 fits the fixing plate 5. At the same time, an adjustment transverse hole 6 is opened on the narrow end of the frame 3. The adjustment transverse holes 6 are two upper and lower adjustment transverse holes 6, and the adjustment transverse holes 6 are long strip holes. The frame 3 is connected and fixed to the fixing plate 5 by bolts. Specifically, the bolts pass through the adjustment transverse holes 6 and are threadedly connected to the fixing plate 5. When the bolts are tightened, the fixing of the frame 3 can be achieved. Once the bolts are loosened, the narrow end of the frame 3 is not in close contact with the fixing plate 5, and the frame 3 can move back and forth, changing the position of the frame 3 relative to the strip hole 4, and the wire unwinding machine 1 can correspond to different molds.

[0034] In order to facilitate the movement of the frame 3, an adjusting bolt 7 for adjusting the horizontal position of the frame 3 is provided between the fixing plate 5 and the narrow end of the frame 3. The axial direction of the adjusting bolt 7 is consistent with the length direction of the adjusting transverse hole 6 and the strip hole 4.

[0035] The adjusting bolt 7 is rotatably arranged on the fixing plate 5, and two nuts 8 are arranged on the adjusting bolt 7. The fixing plate 5 is clamped by the two nuts 8, so that the adjusting bolt 7 can only rotate on the fixing plate 5 and cannot move axially. On this basis, the adjusting bolt 7 is threadedly connected to the narrow end of the frame 3, so that the rotating adjusting bolt 7 can drive the frame 3 to move relative to the fixing plate 5. It is also possible not to use the adjusting bolt 7, and then loosen the bolt on the adjusting horizontal hole 6 to directly manually move the frame 3 to achieve movement, tighten the bolt after moving to fix the frame, and finally tighten the nut 8 to limit the frame 3 through the adjusting bolt 7 to prevent the frame 3 from moving.

[0036] The wire-releasing device is used to actively release the wire, and the wire-releasing device is located at the lower part of the wide end of the frame 3. The wire-releasing device includes a wire-releasing motor 9 and a clamping mechanism 10 controlled by the wire-releasing motor 9. The wire-releasing motor 9 is a servo motor, and the wire-releasing motor 9 can drive the clamping mechanism 10 to operate. The wire-releasing motor 9 and the clamping mechanism 10 are arranged on both sides of the frame 3.

[0037] The clamping mechanism 10 includes a pay-off shaft 101, a clamping disc 102 and a clamping nut 103. The pay-off shaft 101 is rotatably arranged on one side of the frame 3 through a bearing seat, and the pay-off shaft 101 passes through the bearing seat. A pay-off motor 9 is arranged on the other side of the frame 3, and a coupling 11 is arranged between the pay-off motor 9 and the pay-off shaft 101, so as to realize the transmission of power, and then the pay-off motor 9 drives the pay-off shaft 101 to run through the coupling 11.

[0038] Two clamping discs 102 are provided on the pay-off shaft 101, and the two clamping discs 102 are symmetrically arranged. Figure 5As shown. The clamping disc 102 is a conical disc, and a positioning disc 12 is provided on the pay-off shaft 101. The pay-off shaft 101 and the positioning disc 12 are integrally formed. One clamping disc 102 is against the positioning disc 12 and is bolted to the positioning disc 12, so that the position of the clamping disc 102 is fixed. There is a gap between the two clamping discs 102. On the basis of the fixed position of one clamping disc 102, the position of the other clamping disc 102 is adjustable, and a clamping nut 103 is threadedly connected to the end of the pay-off shaft 101. The clamping nut 103 adopts a flange nut, and the clamping nut 103 is tightly against the end face of the other clamping disc 102, so as to limit the clamping disc 102.

[0039] The clamping mechanism 10 is detachably provided with a pay-off wheel 13 wound with wire, that is, the pay-off wheel 13 is arranged between the two clamping discs 102, and the pay-off wheel 13 is sleeved on the pay-off shaft 101, and the pay-off wheel 13 is an I-shaped wheel. When installing the pay-off wheel 13, first remove a clamping disc 102 away from the frame 3, and then sleeve the pay-off wheel 13 on the pay-off shaft 101, one end of the pay-off wheel 13 is against the clamping disc 102 close to the frame 3, and then sleeve the originally removed clamping disc 102 on the pay-off shaft 101, move the clamping disc 102 to ensure that the two clamping discs 102 can limit and support the pay-off wheel 13, and finally tighten the clamping nut 103 to fix the pay-off wheel 13. Since the distance between the two clamping disks 102 is adjustable, the pay-off wheels 13 of different lengths can be installed on the clamping mechanism 10. The installed pay-off wheels 13 are driven to rotate by the pay-off motor 9 to realize active pay-off operation.

[0040] The guide device is used to guide the wire after active release, and the guide device is located at the wide end of the frame 3. The guide device includes a guide member 14 with a guide wheel and a guide member 2 15 with two guide wheels. The guide member 14 is arranged above the pay-off wheel 13, and the guide member 14 and the guide member 2 15 both include a guide shaft 141, a mounting plate 142 and a limit ring 143.

[0041] A mounting plate 142 is provided at one end of the guide shaft 141. The mounting plate 142 is a cylindrical shape with a "T"-shaped cross section. The end of the guide shaft 141 is inserted into the mounting plate 142 and is interference fit with the mounting plate 142, thereby fixing the guide shaft 141. The mounting plate 142 passes through the side wall of the frame 3. The mounting plate 142 and the frame 3 are connected and fixed by bolts. The guide shaft 141 is connected and fixed to the frame 3 through the mounting plate 142. The axial direction of the guide shaft 141 is consistent with the axial direction of the pay-off wheel 13.

[0042] The guide shaft 141 is provided with two limit rings 143 for limiting the guide wheel. The limit rings 143 are passed through the guide shaft 141, and the position of the limit rings 143 on the guide shaft 141 is adjustable. In order to fix the limit rings 143, the limit screws 16 are threadedly connected to the limit rings 143. The limit screws 16 radially pass through the limit rings 143 and are tightly pressed against the guide shaft 141. After tightening the limit screws 16, the limit rings 143 can be fixed. By screwing the limit screws 16, the position of the limit rings 143 on the guide shaft 141 can be adjusted. The two limit rings 143 are used to clamp the guide wheel, thereby fixing the position of the guide wheel and preventing the guide wheel from moving axially.

[0043] The guide member 2 15 is arranged between the pay-off wheel 13 and the guide member 1 14, and the guide member 1 14 and the guide member 2 15 are arranged in an up-down staggered manner, so the connecting line between the guide shaft 141 in the guide member 1 14 and the guide member 2 15 and the pay-off wheel 13 is in a triangular shape. The spacing A between the guide member 2 15 and the guide shaft 141 of the guide member 1 14 is smaller than the spacing B between the guide shaft 141 of the guide member 1 14 and the pay-off wheel 13. The connecting line between the guide shaft 141 of the guide member 1 14 and the pay-off wheel 13 and the connecting line between the guide member 1 14 and the guide shaft 141 of the guide member 2 15 form an angle C, and the angle C ranges from 55 to 65 degrees, and preferably, the angle C is 60 degrees.

[0044] Since the guide member 14 is provided with a guide wheel, and the guide member 2 15 is provided with two guide wheels, the guide wheel on the guide member 14 is defined as the guide wheel 17, and the guide wheel 17 is a V-groove wheel, and the center of the guide wheel 17 has a bearing, and then the guide wheel 17 is rotatably set on the guide shaft 141, and the two limit rings 143 are used to clamp the guide wheel 17 to prevent the guide wheel 17 from axial movement, such as Figure 3 shown.

[0045] The fixed guide wheel 17 corresponds to the middle part of the pay-off wheel 13 in upper and lower parts, and the connecting line between the guide wheel 17 and the two ends of the pay-off wheel 13 is arranged in an isosceles triangle, that is, the distance F1 between the left end of the pay-off wheel 13 and the center of the guide wheel 17 is equal to the distance F2 between the right end of the pay-off wheel 13 and the center of the guide wheel 17. In addition, the guide wheel 17 is far away from the pay-off wheel 13. In this way, when the wire is released on the pay-off wheel 13 while going back and forth, the wire will not rub against the edge of the guide wheel 17, so as to protect the surface coating of the wire. At the same time, it can also prevent the running wire from detaching from the guide wheel 17, and the released wire will not fall off the guide wheel 17 when it swings back and forth on the pay-off wheel 13.

[0046] The two guide wheels on the guide member 2 15 are the inner guide wheel 2 18 and the outer guide wheel 2 19. The structures of the inner guide wheel 2 18 and the outer guide wheel 2 19 are the same as those of the guide wheel 1 17, and will not be described here. The inner guide wheel 2 18 and the outer guide wheel 2 19 are flush with the strip hole 4 in level. The inner guide wheel 2 18 and the outer guide wheel 2 19 are rotatably arranged in parallel on the guide shaft 141. Two limit rings 143 cooperate to clamp the inner guide wheel 2 18 and the outer guide wheel 2 19, thereby preventing the inner guide wheel 2 18 and the outer guide wheel 2 19 from axial movement. The guide wheel 1 17 and the inner guide wheel 2 18 are arranged on the same vertical plane, and the inner guide wheel 2 18 and the outer guide wheel 2 19 are located on different vertical planes.

[0047] The tension device is used to control the tension of the wire when it is drawn. The tension device is located below the guide member 15. The tension device includes a tension wheel 20 that swings up and down on the frame 3 and a sensor 21 for monitoring the swing angle of the tension wheel 20. At the same time, the tension device also includes a mounting rod 22, a tension rod 23 and an eccentric wheel 24. Figure 6 and Figure 7 shown.

[0048] The mounting rod 22 is rotatably connected to the frame 3 through the bearing seat, and the mounting rod 22 passes through the bearing seat. The axial direction of the mounting rod 22 is consistent with the axial direction of the pay-off wheel 13. An eccentric wheel 24 is arranged at one end of the mounting rod 22, and a sensor 21 is also arranged on the frame 3. The sensor 21 points to the eccentric wheel 24, and the sensor 21 is a proximity switch. When the mounting rod 22 rotates, the eccentric wheel 24 is driven to rotate. During the rotation of the eccentric wheel 24, the distance from the sensor 21 is different, and then the rotation angle of the mounting rod 22 can be determined according to the monitoring data of the sensor 21, and it can also be determined whether the tension rod 23 is in a horizontal state.

[0049] The other end of the mounting rod 22 is provided with a tension rod 23. When the tension rod 23 is installed, a mounting block 25 is provided on the mounting rod 22. The upper end of the mounting block 25 is locked on the mounting rod 22 by bolts. After the bolts are loosened, the position of the mounting block 25 on the mounting rod 22 can be adjusted. The tension rod 23 is passed through the lower end of the mounting block 25. The lower end of the mounting block 25 is provided with a mounting bolt 26. The mounting bolt 26 is against the side wall of the tension rod 23. The tension rod 23 can be fixed by tightening the mounting bolt 26. The tension rod 23 is arranged perpendicular to the mounting rod 22. The tension rod 23 swings up and down to drive the mounting rod 22 to rotate.

[0050] The tension wheel 20 is rotated to set the end of the tension rod 23. The tension wheel 20 is arranged below the guide member 15. When the tension wheel 20 is installed, the tension rod 23 is a bent L-shaped rod body. The end of the tension rod 23 is a stepped shaft. The tension wheel 20 is installed on the end and is locked with a flange nut to prevent the tension wheel 20 from falling off. The tension wheel 20 has the same structure as the guide wheel 17. The wire drawing tension can be adjusted online by swinging the tension rod 23, so that the wire feeding tension remains relatively stable. The wire may shake during operation due to poor wiring. If the tension rod 23 is fixed, it will cause the wire to break. The wire is tightened by swinging the tension rod 23 up and down, which can avoid the breakage caused by shaking and ensure the tension of the incoming wire.

[0051] In order to limit the up and down swing range of the tension wheel 20, the frame 3 is also provided with spaced-apart limit cylinders 27, and the tension rod 23 is located between the two limit cylinders 27 and swings up and down. The swing center of the tension rod 23 and the connecting line between the two limit cylinders 27 form an angle D, and the range of the angle D is 30-60°.

[0052] The principle of the present invention is as follows: when the wire on the pay-off wheel 13 is wound, the wire is led out and sequentially wound around the guide wheel on the guide member 14, a guide wheel on the guide member 2 15, the tension wheel 20 and another guide wheel on the guide member 2 15, and then introduced into the wire drawing machine 2 through the strip hole 4. Specifically, the wire on the pay-off wheel 13 is led out and sequentially wound around the guide wheel 1 17, the inner guide wheel 2 18, the tension wheel 20 and the outer guide wheel 2 19, and then introduced into the wire drawing machine 2 through the strip hole 4. The wire drawn by the wire drawing machine 2 is wound up by the wire take-up machine. The rotation speed of the pay-off wheel 13 is controlled to match the rotation speed of the wire drawing machine 2, and the tension rod 23 is kept in a basically horizontal position. When the tension rod 23 is in a horizontal position, the axis of the tension wheel 20 and the outer guide wheel 2 19 are on the same vertical line. The up and down swinging of the tension rod 23 can balance the drawing force of the wire, ensure the best tension of the wire, and avoid damage to the wire.

[0053] At the same time, the change in the tension of the wire is reflected by the rotation of the mounting rod 22. The sensor 21 can monitor the rotation of the mounting rod 22. The sensor 21 is connected to the pay-off motor 9, the wire drawing machine 2 and the wire take-up machine through the frequency converter. The monitoring of the sensor 21 can determine the tension of the wire, and then control the pay-off machine 1, the wire drawing machine 2 and the wire take-up machine in linkage. The running speeds of the three devices are adjusted synchronously to ensure the stability of the wire tension, that is, the rotation speed of the pay-off wheel 13 is adapted to the tension of the wire, that is, the pay-off motor 9 controls the pay-off wheel 13 to run at the corresponding rotation speed according to the tension of the wire, thereby ensuring the continuity of the wire and improving the stability of the wire quality.

[0054] It should be noted that when the wire is wound, it must be released from the pay-off wheel 13 and then pass through the various devices of the pay-off machine 1. When the wire is tightened after passing around the tension wheel 20, the tension rod 23 swings upward. At this time, the sensor 21 detects the swing and then controls the pay-off machine 1, the wire drawing machine 2 and the wire take-up machine to start running, thereby facilitating the pay-off of the wire and the subsequent wire drawing operation, and realizing the active pay-off of the pay-off machine 1 and the active traction of the wire drawing machine 2.

[0055] In order to ensure that the wire can pass through the strip hole 4, a guide wheel 28 is adjustable on one side wall of the wire drawing machine 2. The position of the guide wheel 28 is adjustable. The guide wheel 28 corresponds to the strip hole 4. Figure 4 Specifically, a mounting seat 29 is bolted to one side wall of the wire drawing machine 2, the cross section of the mounting seat 29 is T-shaped, and vertical adjustment holes 30 are respectively provided on the upper and lower sides of the mounting seat 29, with two vertical adjustment holes 30 on each side, and the bolts pass through the vertical adjustment holes 30 and are threadedly connected to the side wall of the wire drawing machine 2. After tightening the bolts, the position of the mounting seat 29 is fixed, and after loosening the bolts, the mounting seat 29 can slide up and down along the side wall of the wire drawing machine 2.

[0056] The mounting seat 29 is provided with a mounting shaft 31, and the axial direction of the mounting shaft 31 is consistent with the length direction of the strip hole 4. The mounting shaft 31 is rotatably provided with a guide wheel 28. The guide wheel 28 and the guide wheel 17 have the same shape but different diameters. The diameter of the guide wheel 28 is smaller than the diameter of the guide wheel 17. The guide wheel 28 is axially movable along the mounting shaft 31, and the guide wheel 28 moves horizontally and linearly within the range of the strip hole 4. Here, the installation method of the guide wheel 28 on the mounting shaft 31 also adopts a limit ring 143 to prevent the guide wheel 28 from axially moving on the mounting shaft 31. The outer guide wheel 219, the tension wheel 20 and the guide wheel 28 are arranged on the same vertical plane. The wire that bypasses the outer guide wheel 219 first passes through the guide wheel 28 and then accurately penetrates into the strip hole 4.

[0057] The tungsten wire cold drawing method comprises the following steps: Step 1, feeding: The tungsten wire after nickel plating and brass plating is wound on the pay-off wheel 13, and the pay-off wheel 13 is installed on the pay-off shaft 101. The end of the tungsten wire is led out, and it is wound through the guide wheel 17, the inner guide wheel 2 18, the tension wheel 20, the outer guide wheel 2 19 and the guide wheel 28 in sequence, and then penetrated into the wire drawing machine 2 through the strip hole 4, and wound between the corresponding tower wheel and the die according to the drawing requirements, and finally the tungsten wire is wound on the wire take-up machine. The tungsten wire passes through the die by electrolysis, and the tungsten wire is corroded by the electrolyte to make it thinner, and then it is inserted into the die.

[0058] Step 2, lubricant addition: add lubricant to the wire drawing machine 2, immerse the die and the tower wheel therein, the lubricant is a mixture of pure water and lubricant stock solution, wherein the pure water has a pH value of 6.5-7.5, and a conductivity of ≤5us / cm, and pure water and lubricant stock solution are added at a volume ratio of 10:1, and the lubricant stock solution is a lubricant produced by Solvay, France. In order to control the bacterial content in the lubricant, it is also necessary to add a conventional bactericide, where the bactericide uses a bactericide of the type Kasson 886, and the amount of bactericide is added according to the frequency of addition and the results of bacterial detection. The lubricant is a weak alkaline chloride, the lubricant temperature is 40±2°C, the pH value is 8.0-8.8, the refractive index is 4.5-6.0, the positive divalent copper ion is 600±300ppm, the positive divalent zinc ion is 300±200ppm, and the fatty acid is ≥3500ppm.

[0059] Step 3, drawing: use the tower wheel water tank wire drawing machine 2 to draw the tungsten wire, the drawing speed is 5-7 m / s, the drawing passes are 10-13 times, and the compression rate of a single pass is 2-15%, so as to reduce the diameter of the tungsten wire in sequence until the tungsten wire with the required wire diameter is drawn. During the drawing process, the running speed of the pay-off motor 9, the wire drawing machine 2 and the wire taking-up machine are automatically adjusted according to the tension of the tungsten wire.

[0060] Taking the processing of tungsten wire with a diameter of 0.0615mm to tungsten wire with a diameter of 0.0300mm as an example, the cold drawing method is as follows: the tungsten wire is drawn out from the wire-releasing machine 1, passed through the wire-drawing machine 2, and then wound on the wire-receiving machine; lubricating fluid is added to the wire-drawing machine 2; after the equipment is started and operated, the tungsten wire is drawn at a speed of 5m / s, and the tungsten wire is drawn through the wire-drawing machine 2 for 11 times. After 11 times of drawing, the diameters of the tungsten wires are 0.0569, 0.0 532, 0.0498, 0.0466, 0.0436, 0.0408, 0.0382, 0.0357, 0.0334, 0.0312, 0.0300mm, the compression rate of each pass is 14.4, 12.58, 12.37, 12.44, 12.46, 12.43, 12.34, 12.66, 12.47, 12.74, 7.54%, such as Figure 8 shown.

[0061] Taking the processing of tungsten wire with a diameter of 0.0620mm to tungsten wire with a diameter of 0.0320mm as an example, the cold drawing method is as follows: the tungsten wire is drawn out from the wire-releasing machine 1, passed through the wire-drawing machine 2, and then wound on the wire-receiving machine; lubricating fluid is added to the wire-drawing machine 2; after the equipment is started and operated, the tungsten wire is drawn at a speed of 5m / s, and the tungsten wire is drawn through the wire-drawing machine 2 for 11 times. After 11 times of drawing, the diameters of the tungsten wires are 0.0611, 0. 0571, 0.0534, 0.0499, 0.0467, 0.0437, 0.0409, 0.0382, 0.0357, 0.0334, 0.0320mm, the compression rate of each pass is 2.88, 12.66, 12.54, 12.68, 12.41, 12.44, 12.40, 12.77, 12.66, 12.47, 8.21%, such as Fig. 9 shown.

[0062] The embodiments described above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made according to the structures, features and principles described in the patent scope of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. A wire drawing system with its own wire pay-off power, comprising a wire pay-off machine (1), a wire drawing machine (2) and a wire take-up machine, wherein the wire drawn out from the wire pay-off machine (1) is wound around the wire drawing machine (2) and then wound onto the wire take-up machine, characterized in that: The wire-releasing machine (1) comprises a frame (3) adjustably arranged on a side wall of a wire drawing machine (2), and a wire-releasing device, a guiding device and a tension device arranged on the frame (3); A strip hole (4) for feeding the wire is provided on one side wall of the wire drawing machine (2), the frame (3) moves horizontally and linearly within the range of the strip hole (4), and a guide wheel (28) is adjustable on one side wall of the wire drawing machine (2), the guide wheel (28) and the strip hole (4) correspond to each other; The wire-releasing device comprises a wire-releasing motor (9) and a clamping mechanism (10) controlled by the wire-releasing motor (9); a wire-releasing wheel (13) wound with wire is detachably provided on the clamping mechanism (10); The guide device comprises a guide member 1 (14) having a guide wheel and a guide member 2 (15) having two guide wheels, wherein the guide member 1 (14) is arranged above the pay-off wheel (13), and the guide member 2 (15) is arranged between the pay-off wheel (13) and the guide member 1 (14), and the guide member 1 (14) and the guide member 2 (15) are arranged in an up-down staggered manner; The tension device comprises a tension wheel (20) which is swung up and down on the frame (3) and a sensor (21) for monitoring the swing angle of the tension wheel (20), wherein the tension wheel (20) is arranged below the second guide member (15); The wire on the pay-off wheel (13) is led out and sequentially passes through a guide wheel on the guide member 1 (14), a guide wheel on the guide member 2 (15), a tension wheel (20), another guide wheel on the guide member 2 (15) and a guide wheel (28), and is then introduced into the wire drawing machine (2).

2. The wire drawing system with self-contained pay-off power according to claim 1, characterized in that: The strip-shaped holes (4) are arranged horizontally, a mounting seat (29) is bolted to a side wall of the wire drawing machine (2), an adjusting vertical hole (30) is provided on the mounting seat (29), a bolt passes through the adjusting vertical hole (30) and is threadedly connected to the side wall of the wire drawing machine (2), and the mounting seat (29) slides up and down along the side wall of the wire drawing machine (2); The mounting seat (29) is provided with a mounting shaft (31), the axial direction of the mounting shaft (31) being consistent with the length direction of the strip hole (4), the guide wheel (28) being rotatably arranged on the mounting shaft (31), the guide wheel (28) being movably arranged along the axial direction of the mounting shaft (31), and the guide wheel (28) being horizontally and linearly movable within the range of the strip hole (4).

3. The wire drawing system with self-contained pay-off power according to claim 1, characterized in that: A fixing plate (5) is provided on one side wall of the wire drawing machine (2), and the fixing plates (5) are arranged below the strip-shaped holes (4) at intervals; The frame (3) is narrow at one end and wide at the other end. The narrow end of the frame (3) fits the fixing plate (5). An adjusting transverse hole (6) is provided on the narrow end of the frame (3). The frame (3) is connected and fixed to the fixing plate (5) by bolts. The bolts pass through the adjusting transverse hole (6) and are threadedly connected to the fixing plate (5). An adjusting bolt (7) for adjusting the horizontal position of the frame (3) is further provided between the fixing plate (5) and the narrow end of the frame (3). The adjusting bolt (7) is rotatably provided on the fixing plate (5). The adjusting bolt (7) is threadedly connected to the narrow end of the frame (3).

4. The wire drawing system with self-contained pay-off power according to claim 1, characterized in that: The clamping mechanism (10) comprises a pay-off shaft (101), a clamping disc (102) and a clamping nut (103); the pay-off shaft (101) is rotatably arranged on one side of the frame (3) via a bearing seat; the pay-off motor (9) is arranged on the other side of the frame (3); the pay-off motor (9) is a servo motor; a coupling (11) is arranged between the pay-off motor (9) and the pay-off shaft (101); The pay-off shaft (101) is provided with two clamping discs (102), the two clamping discs (102) are symmetrically arranged, the pay-off wheel (13) is arranged between the two clamping discs (102), the pay-off wheel (13) is sleeved on the pay-off shaft (101), the end of the pay-off shaft (101) is threadedly connected with the clamping nut (103), and the clamping nut (103) is tightly against the end surface of one clamping disc (102).

5. The wire drawing system with self-contained pay-off power according to claim 1, characterized in that: The guide member 1 (14) and the guide member 2 (15) both comprise a guide shaft (141), a mounting plate (142) and a limiting ring (143); the mounting plate (142) is provided at one end of the guide shaft (141); the mounting plate (142) and the frame (3) are bolted together; the guide shaft (141) is connected and fixed to the frame (3) via the mounting plate (142); two limiting rings (143) for limiting the guide wheel are provided on the guide shaft (141); the limiting rings (143) are threadedly connected to the limiting screws (16); the limiting screws (16) radially pass through the limiting rings (143) and are tightly pressed against the guide shaft (141).

6. The wire drawing system with self-contained pay-off power according to claim 5, characterized in that: The connecting line between the guide shaft (141) in the guide member 1 (14) and the guide member 2 (15) and the pay-off wheel (13) is in the shape of a triangle; the distance A between the guide member 2 (15) and the guide shaft (141) of the guide member 1 (14) is smaller than the distance B between the guide shaft (141) of the guide member 1 (14) and the pay-off wheel (13); the connecting line between the guide shaft (141) of the guide member 1 (14) and the pay-off wheel (13) and the connecting line between the guide shaft (141) of the guide member 1 (14) and the guide member 2 (15) form an angle C, and the angle C ranges from 55 to 65 degrees.

7. The wire drawing system with self-contained pay-off power according to claim 5, characterized in that: The guide wheel on the guide member 1 (14) is a guide wheel 1 (17), and the guide wheel 1 (17) is rotatably arranged on the guide shaft (141), and two limit rings (143) cooperate to clamp the guide wheel 1 (17); The two guide wheels on the guide member 2 (15) are respectively an inner guide wheel 2 (18) and an outer guide wheel 2 (19); the inner guide wheel 2 (18) and the outer guide wheel 2 (19) are rotatably arranged in parallel on the guide shaft (141); and two limit rings (143) cooperate to clamp the inner guide wheel 2 (18) and the outer guide wheel 2 (19).

8. The wire drawing system with self-powered wire release according to claim 7, characterized in that: The guide wheel 1 (17) corresponds to the middle part of the pay-off wheel (13) in the upper and lower parts, and the connecting line between the guide wheel 1 (17) and the two ends of the pay-off wheel (13) is arranged in an isosceles triangle; The guide wheel 1 (17) and the inner guide wheel 2 (18) are arranged on the same vertical plane, and the outer guide wheel 2 (19), the tension wheel (20) and the guide wheel (28) are arranged on the same vertical plane; The wire on the pay-off wheel (13) is led out and sequentially passes through the guide wheel 1 (17), the inner guide wheel 2 (18), the tension wheel (20), the outer guide wheel 2 (19) and the guide wheel (28), and then passes through the strip hole (4) and is introduced into the wire drawing machine (2).

9. The wire drawing system with self-contained pay-off power according to claim 1, characterized in that: The tension device further comprises a mounting rod (22), a tension rod (23) and an eccentric wheel (24); the mounting rod (22) is rotatably connected to the frame (3) via a bearing seat; the mounting rod (22) passes through the bearing seat; the axial direction of the mounting rod (22) is consistent with the axial direction of the pay-off wheel (13); the eccentric wheel (24) is arranged at one end of the mounting rod (22); the sensor (21) is also arranged on the frame (3); the sensor (21) points to the eccentric wheel (24); the tension rod (23) is arranged at the other end of the mounting rod (22); the tension rod (23) is arranged perpendicular to the mounting rod (22); the tension wheel (20) is rotatably arranged at the end of the tension rod (23); The frame (3) is further provided with stop cylinders (27) arranged at intervals up and down, the tension rod (23) is located between the two stop cylinders (27) and swings up and down, and an angle D is formed between the swing center of the tension rod (23) and the line connecting the two stop cylinders (27), and the range of the angle D is 30-60 degrees.

10. A method for cold drawing a tungsten wire, characterized in that: The wire drawing system with self-contained pay-off power according to any one of claims 1 to 9 comprises the following steps: Step 1, loading: The tungsten wire after nickel plating and brass plating is wound on the pay-off wheel (13), the pay-off wheel (13) is installed on the pay-off shaft (101), the end of the tungsten wire is led out, and is wound around the guide wheel 1 (17), the inner guide wheel 2 (18), the tension wheel (20), the outer guide wheel 2 (19) and the guide wheel (28) in sequence, and then passes through the strip hole (4) into the wire drawing machine (2), and is wound between the corresponding tower wheel and the mold according to the drawing requirements, and finally the tungsten wire is wound on the wire taking-up machine; Step 2, adding lubricant: adding lubricant into the wire drawing machine (2), immersing the die and the step pulley therein, wherein the lubricant temperature is 40±2°C, the pH value is 8.0-8.8, the refractive index is 4.5-6.0, the positive divalent copper ion is 600±300ppm, the positive divalent zinc ion is 300±200ppm, and the fatty acid is ≥3500ppm; Step 3, drawing: using a wire drawing machine (2) to draw the tungsten wire, the drawing speed is 5-7 m / s, the drawing passes are 10-13 times, and the compression rate of each pass is 2-15%, until the tungsten wire with the required wire diameter is drawn.

Images