Lanthanum-doped fine tungsten wire drawing device and method

Abstract

The invention belongs to the technical field of tungsten filament processing, and relates to a lanthanum-doped fine tungsten filament wire drawing device and a wire drawing method.The lanthanum-doped fine tungsten filament wire drawing device comprises a machine frame, a mounting frame, a controller, a winding frame, a gear motor, a rotating shaft, a wire drawing mechanism, a heating mechanism and a cooling mechanism, the mounting frame is mounted on the machine frame, and the controller is mounted at the top of the machine frame; a winding frame is connected to the mounting frame, a speed reducing motor is mounted on the mounting frame, a rotating shaft is connected to an output shaft of the speed reducing motor, a wire drawing mechanism used for conducting wire drawing on tungsten wires is arranged on the mounting frame, and the wire drawing mechanism comprises a wire drawing die. And a heating mechanism and a cooling mechanism which are used for heating the tungsten filament are arranged in the wire drawing die. After wire drawing is completed, wire winding can be conducted through the wire winding wheel, in the wire winding process of the wire winding wheel, the gear rotates to drive the reciprocating lead screw to move back and forth in a reciprocating mode, and therefore the wire winding wheel is driven to move back and forth in a reciprocating mode, and tungsten wires are evenly distributed on the wire winding wheel.

Description

Technical Field

[0001] The invention belongs to the technical field of tungsten wire processing, and relates to a lanthanum-doped thin tungsten wire drawing device and a wire drawing method. Background Art

[0002] Tungsten wire drawing equipment heats, stretches and cools tungsten wire to make tungsten wire of various specifications. Tungsten alloy is a metal material with high melting point, high strength and high hardness, which has broad application prospects in electronics, aerospace and military industries.

[0003] After searching, the patent publication number CN116921477A discloses a tower wheel module for fine tungsten wire drawing, which includes a main body and a shell. The main body includes a multi-layer guide wheel, and its material is cast iron or stainless steel, and the shell covers the surface of the multi-layer guide wheel, and its material includes cemented carbide or ceramic.

[0004] The above patent has the following shortcomings: when winding the tungsten wire that has been drawn, the wire is taken up by a wire taking-up module. If the tungsten wire needs to be wound, in order to ensure that the tungsten wire is evenly distributed on the winding drum, it is necessary to control the wire taking-up module to move back and forth continuously to drive the tungsten wire to move back and forth to adjust the distribution position. However, such operation requires repeated pulling of the tungsten wire. During the drawing process, the tungsten wire undergoes heating, cooling, and drawing, and becomes thinner and brittle when cooled. In the process of repeated pulling of the tungsten wire, the tungsten wire is easily broken, affecting the overall winding work. Summary of the invention

[0005] In view of this, the present invention provides a lanthanum-doped tungsten thin wire drawing device and a wire drawing method.

[0006] The technical solution of the present invention is: a lanthanum-doped tungsten wire drawing device and a wire drawing method, comprising a frame, a mounting frame, a controller, a winding frame, a reduction motor, a rotating shaft, a wire drawing mechanism, a heating mechanism and a cooling mechanism, wherein the frame is mounted with a mounting frame, the top of the frame is mounted with a controller, the mounting frame is connected with a winding frame, the mounting frame is mounted with a reduction motor, the output shaft of the reduction motor is connected with a rotating shaft, the mounting frame is provided with a wire drawing mechanism for drawing tungsten wire, the wire drawing mechanism includes a wire drawing die, the wire drawing mechanism includes a wire drawing die, and the wire drawing mechanism includes a wire drawing die. The mold is provided with a heating mechanism for heating the tungsten wire and a cooling mechanism for cooling the tungsten wire, and also includes a wire-taking mechanism, which includes a mounting seat, a belt transmission group, a connecting shaft, a wire-taking wheel and a shifting component. The top of the mounting frame is connected to the mounting seat, and the mounting seat is rotatably connected to the connecting shaft. A belt transmission group is arranged between the connecting shaft and the rotating shaft, and a wire-taking wheel is slidably connected to the connecting shaft. A shifting component for controlling the reciprocating movement of the wire-taking wheel to ensure uniform wire taking-up is arranged between the wire-taking wheel and the mounting seat.

[0007] It is further explained that the heating mechanism includes an electric heating wire, a sealing plate, a sealing gasket and an elastic member. The electric heating wire is installed on one side of the wire drawing die close to its entry port. The wire threading entry port of the wire drawing die is connected to a sealing plate. A wire entry hole is opened in the middle of the sealing plate. Four sealing gaskets are slidably connected to the middle of the sealing plate at uniform intervals along the circumferential direction. An elastic member is connected between the sealing gasket and the sealing plate.

[0008] Further description, the wire drawing mechanism also includes a connecting seat and a wire wheel, the connecting seat is connected to the mounting frame, both sides of the mounting frame are rotatably connected to wire wheels, one side of the wire wheel is connected to the rotating shaft, and both sides of the top of the connecting seat are connected to multiple wire drawing dies, and the wire drawing dies on both sides are staggered.

[0009] It is further explained that the interior of the wire drawing die is composed of an entry port, an extrusion channel, a threading channel and an outlet port.

[0010] Further description, the cooling mechanism includes an inner spiral sleeve and a plugging cover, a cooling cavity is opened in the wire drawing die, the cooling cavity is communicated with the threading channel, an inner spiral sleeve is arranged in the cooling cavity, the middle part of the inner spiral sleeve is hollow, two connecting channels and two ventilation channels are opened on the wire drawing die, the ends of the two connecting channels are respectively communicated with the two sides of the inner spiral sleeve, and the two ventilation channels are both connected with the cooling cavity, and plugging covers are arranged at the ends of the ventilation channels.

[0011] Further description, the shifting mechanism includes a turntable, a reciprocating screw and a gear, the take-up wheel is rotatably connected to the turntable, the turntable is rotatably connected to the reciprocating screw, the reciprocating screw is slidably connected to the mounting seat, the upper front part of the mounting seat is rotatably connected to a gear, the gear and the reciprocating screw are connected by threaded transmission, the connecting shaft is provided with teeth grooves evenly spaced along the circumference, and the gear is meshed with the connecting shaft through the teeth grooves.

[0012] Further description, it also includes a control mechanism, which includes a connecting frame, a sliding rod and a contact switch. The top of the mounting frame is connected to the connecting frame, and the sliding rods are evenly and slidably connected to the connecting frame. The top of the sliding rod is connected to the contact switch, and the bottom of the sliding rod is rotatably connected to a guide wheel.

[0013] It is further explained that the contact switch and the reduction motor are both electrically connected to the controller.

[0014] A method for drawing lanthanum-doped thin tungsten wire, the specific steps are as follows: S1: The tungsten wire is drawn through multiple wire drawing dies and wire guide wheels in sequence. When the tungsten wire passes through the wire drawing die, it passes through the wire entry hole; S2: When the tungsten wire passes through the wire entry hole, the sealing pad presses the tungsten wire under the action of the elastic member to seal the tungsten wire; S3: The tungsten wire continues to move to the electric heating wire and is heated by the electric heating wire. The heated tungsten wire then passes through the extrusion channel to extrude the tungsten wire through the extrusion channel to achieve wire drawing of the tungsten wire.

[0015] Compared with the prior art, the present invention has the following advantages: 1. After the wire drawing is completed, the present invention can be used for wire winding through the wire-winding wheel. During the wire-winding process, the wire-winding wheel can drive the reciprocating screw rod to move back and forth through the rotation of the gear, thereby driving the wire-winding wheel to move back and forth, so that the tungsten wire is evenly distributed on the wire-winding wheel. When winding, the tungsten wire is evenly distributed through the movement of the wire-winding wheel, and the tungsten wire is not pulled to move, thereby preventing the tungsten wire from being pulled back and forth and causing breakage.

[0016] 2. When drawing the tungsten wire, the present invention can isolate the external gas through the sealing plate, so as to prevent the heated tungsten wire from reacting with the outside and causing oxidation. At the same time, the tungsten wire can enter the inner spiral sleeve and be filled with inert gas to protect the tungsten wire.

[0017] 3. In the present invention, when the tungsten wire is located at the inner spiral sleeve, liquid nitrogen can be added into the cooling cavity to achieve the effect of cooling the tungsten wire, and inert gas is also used for protection during the cooling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the first structure of the wire drawing mechanism of the present invention.

[0020] Figure 3 This is a second structural schematic diagram of the wire drawing mechanism of the present invention.

[0021] Figure 4 It is a cross-sectional view of the wire drawing die of the present invention.

[0022] Figure 5 It is a cross-sectional view of the wire drawing die and the connecting seat of the present invention.

[0023] Figure 6 For the present invention Figure 5 Enlarged view of part A in .

[0024] Figure 7 It is a schematic structural diagram of the inner spiral sleeve of the present invention.

[0025] Figure 8 It is a schematic diagram of the first structure of the wire taking-up mechanism and the shifting mechanism of the present invention.

[0026] Fig. 9 It is a second structural schematic diagram of the wire taking-up mechanism and the shifting mechanism of the present invention.

[0027] Fig.10 It is a cross-sectional view of the wire taking-up mechanism and the shifting mechanism of the present invention.

[0028] Fig.11 It is a structural schematic diagram of the control mechanism of the present invention.

[0029] Fig.12 For the present invention Fig.11 Enlarged view of part B.

[0030] In the figure: 1: frame, 2: mounting frame, 21: controller, 3: winding frame, 4: reduction motor, 41: rotating shaft, 51: connecting seat, 52: wire pulley, 53: wire drawing die, 531: entry port, 532: extrusion channel, 533: threading channel, 534: outlet port, 61: heating wire, 62: sealing plate, 63: sealing gasket, 64: elastic part, 71: inner spiral sleeve, 72: connecting channel, 73: cooling cavity, 74: ventilation channel, 75: plugging cover, 81: mounting seat, 82: belt drive group, 83: connecting shaft, 84: take-up wheel, 851: turntable, 852: reciprocating screw rod, 853: gear, 91: connecting frame, 92: sliding rod, 93: contact switch, 100: tungsten wire. DETAILED DESCRIPTION

[0031] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0032] A lanthanum-doped tungsten wire drawing device, such as Figure 1-Figure 7 As shown, it includes a frame 1, a mounting frame 2, a controller 21, a winding frame 3, a reduction motor 4, a rotating shaft 41, a wire drawing mechanism, a heating mechanism and a cooling mechanism. The mounting frame 2 is installed on the rear side of the frame 1, and the controller 21 is installed on the top of the frame 1. The winding frame 3 is connected to the left side of the mounting frame 2, and the reduction motor 4 is installed on the rear right side of the mounting frame 2. The rotating shaft 41 is connected to the output shaft of the reduction motor 4. The mounting frame 2 is provided with a wire drawing mechanism for drawing the tungsten wire 100, and the wire drawing mechanism includes a wire drawing die 53. The wire drawing die 53 is provided with a heating mechanism for heating the tungsten wire 100 and a cooling mechanism for cooling the tungsten wire 100.

[0033] like Figure 2 and Figure 3As shown, the wire drawing mechanism also includes a connecting seat 51 and a wire wheel 52. The connecting seat 51 is connected to the middle of the front side of the mounting frame 2, and the upper left and right sides of the front side of the mounting frame 2 are rotatably connected to the wire wheels 52. The right wire wheel 52 is connected to the rotating shaft 41, and multiple wire drawing dies 53 are connected to the left and right sides of the top of the connecting seat 51, and the wire drawing dies 53 on the left and right sides are staggered.

[0034] like Figure 4 As shown, the interior of the wire drawing die 53 is composed of an entry port 531, an extrusion channel 532, a threading channel 533 and an outlet port 534. When the tungsten wire 100 is inserted, it passes through the entry port 531, the extrusion channel 532, the threading channel 533 and the outlet port 534 in sequence.

[0035] like Figure 5 and Figure 6 As shown, the heating mechanism includes a heating wire 61, a sealing plate 62, a sealing gasket 63 and an elastic member 64. The heating wire 61 is installed on one side of the wire drawing die 53 near its entry port 531. The threading entry port 531 of the wire drawing die 53 is connected to the sealing plate 62. A wire entry hole is opened in the middle of the sealing plate 62. Four sealing gaskets 63 are slidably connected to the middle of the sealing plate 62 at uniform intervals along the circumferential direction. The sealing gasket 63 is arranged in an arc shape. When the four sealing gaskets 63 are gathered together, they are ring-shaped. An elastic member 64 is connected between the sealing gasket 63 and the sealing plate 62. The elastic member 64 is a compression spring.

[0036] like Figure 5-Figure 7 As shown, the cooling mechanism includes an inner spiral sleeve 71 and a plugging cover 75. A cooling cavity 73 is provided in the wire drawing die 53. The cooling cavity 73 is communicated with the threading channel 533. An inner spiral sleeve 71 is provided in the cooling cavity 73. The middle part of the inner spiral sleeve 71 is hollow to facilitate the passage of the tungsten wire 100. Two connecting channels 72 and two ventilation channels 74 are provided on the wire drawing die 53. The ends of the two connecting channels 72 are respectively communicated with the left and right sides of the inner spiral sleeve 71. Both ventilation channels 74 are communicated with the cooling cavity 73. Plugging covers 75 are provided at the ends of the ventilation channels 74.

[0037] like Figure 8-Figure 10 As shown, it also includes a take-up mechanism, which includes a mounting seat 81, a belt transmission group 82, a connecting shaft 83 and a take-up wheel 84. The mounting seat 81 is connected to the right side of the top of the mounting frame 2, and the mounting seat 81 is rotatably connected to the connecting shaft 83. A belt transmission group 82 is arranged between the connecting shaft 83 and the rotating shaft 41, and the take-up wheel 84 is slidably connected to the front side of the connecting shaft 83.

[0038] When the tungsten wire 100 needs to be drawn, the present device can be used. First, the wound tungsten wire 100 is placed on the winding frame 3, and then the tungsten wire 100 is drawn out and sequentially passes through a plurality of drawing dies 53 and around two wire wheels 52. For details, refer to Figure 3 When the tungsten wire 100 passes through the wire drawing die 53, the wire drawing die 53 can extrude the tungsten wire 100 to make the tungsten wire 100 thinner, thereby achieving the effect of wire drawing, and then the end of the tungsten wire 100 is wound on the take-up wheel 84, and then the reduction motor 4 can be controlled to operate. When the reduction motor 4 is in operation, it drives the right wire wheel 52 to rotate through the rotating shaft 41, thereby driving the tungsten wire 100 to move. When the reduction motor 4 is in operation, it can also drive the connecting shaft 83 and the take-up wheel 84 to rotate through the belt transmission group 82, so as to roll up the tungsten wire 100 that has been drawn. During the wire drawing process, the tungsten wire 100 will pass through the wire entry hole at the sealing plate 62, and under the action of the elastic member 64, the sealing gasket 63 can press the tungsten wire 100 to prevent the outside gas from entering. Then the tungsten wire 100 passes through the middle of the electric heating wire 61, and the electric heating wire 61 can be controlled to heat the tungsten wire 100. The heated tungsten wire 100 passes through the extrusion channel 532 and the extrusion channel 53. 2 is extruded to compress the tungsten wire 100 to achieve the wire drawing effect. After the wire drawing is completed, it passes through the threading channel 533 and the middle part of the inner spiral sleeve. At this time, the inner spiral sleeve 71 can be filled with inert gas through one side connecting channel 72 to protect the tungsten wire 100. The connecting channel 72 on the other side is used to discharge the inert gas. At the same time, one side of the plugging cover 75 is pulled out, and liquid nitrogen is filled into the cooling cavity 73 through the ventilation channel 74. After the filling is completed, the plugging cover 75 is blocked back, and the inner spiral sleeve 71 is cooled by the liquid nitrogen in the cooling cavity 73, so as to cool the tungsten wire 100 after the wire drawing is completed. In this way, the tungsten wire 100 can be drawn using the device, and after the wire drawing is completed, the inert gas can be filled to protect the tungsten wire 100, and the liquid nitrogen can also be filled to cool the tungsten wire 100, so that the tungsten wire 100 contacts the air when it moves after cooling, so as to avoid the tungsten wire 100 from reacting and oxidizing with the outside air when heated.

[0039] like Figure 8-Figure 10 As shown, it also includes a shifting mechanism, which includes a turntable 851, a reciprocating screw rod 852 and a gear 853. The take-up wheel 84 is rotatably connected to the turntable 851 at the rear side, and the reciprocating screw rod 852 is rotatably connected to the turntable 851. The reciprocating screw rod 852 is slidably connected to the mounting seat 81, and the upper front side of the mounting seat 81 is rotatably connected to the gear 853. The gear 853 is connected to the reciprocating screw rod 852 through a threaded transmission, so that the rotation of the gear 853 can drive the reciprocating screw rod 852 to move forward and backward. The connecting shaft 83 is provided with teeth grooves evenly spaced along the circumferential direction, and the gear 853 is meshed with the connecting shaft 83 through the teeth grooves.

[0040] When the connecting shaft 83 rotates, the gear 853 can be driven to rotate through the tooth groove. The rotation of the gear 853 drives the reciprocating screw rod 852 to move back and forth through the thread. The reciprocating screw rod 852 drives the turntable 851 to move back and forth during the reciprocating movement. The reciprocating movement of the turntable 851 can drive the take-up wheel 84 to move back and forth. The take-up wheel 84 reciprocates back and forth while rotating, so that the tungsten wire 100 can be evenly wound on the take-up wheel 84 to prevent the tungsten wire 100 from being wound on one place of the take-up wheel 84.

[0041] like Fig.11 and Fig.12 As shown, a control mechanism is also included, which includes a connecting frame 91, a sliding rod 92 and a contact switch 93. The connecting frame 91 is connected to the top of the mounting frame 2, and the sliding rods 92 are evenly spaced and slidably connected to the right side of the connecting frame 91. The top of the sliding rod 92 is connected to the contact switch 93, and the bottom of the sliding rod 92 is provided with a guide wheel.

[0042] The contact switch 93 and the reduction motor 4 are both electrically connected to the controller 21 .

[0043] When the tungsten wire 100 is wound, the tungsten wire 100 presses against the guide wheel, thereby propping up the sliding rod 92. During operation, if the tungsten wire 100 breaks, the guide wheel and the sliding rod 92 will no longer be supported. At this time, the sliding rod 92 falls under the action of gravity, causing the contact switch 93 to unload. The contact switch 93 falls until it contacts the connecting frame 91, thereby sending a signal to the controller 21 to control the reduction motor 4 to turn off, so as to suspend wire drawing and prevent the reduction motor 4 from idling.

[0044] This embodiment also provides a method for drawing a lanthanum-doped thin tungsten wire, and the specific steps are as follows: S1: The tungsten wire is drawn out and passed through a plurality of wire drawing dies 53 and a wire guide wheel 52 in sequence. When the tungsten wire passes through the wire drawing die 53, it passes through the wire entry hole; S2: When the tungsten wire passes through the wire entry hole, the sealing gasket 63 presses the tungsten wire under the action of the elastic member 64 to seal the tungsten wire; S3: The tungsten wire continues to move to the electric heating wire 61 and is heated by the electric heating wire 61. The heated tungsten wire then passes through the extrusion channel 532 to be extruded through the extrusion channel 532, so as to achieve wire drawing processing of the tungsten wire.

[0045] While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.The scope of the following claims is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures and functions.

Claims

1. A lanthanum-doped tungsten fine wire drawing device, characterized in that: The invention comprises a frame (1), a mounting frame (2), a controller (21), a winding frame (3), a reduction motor (4), a rotating shaft (41), a wire drawing mechanism, a heating mechanism and a cooling mechanism, wherein the mounting frame (2) is mounted on the frame (1), the controller (21) is mounted on the top of the frame (1), the winding frame (3) is connected to the mounting frame (2), the reduction motor (4) is mounted on the mounting frame (2), the output shaft of the reduction motor (4) is connected to the rotating shaft (41), the mounting frame (2) is provided with a wire drawing mechanism for drawing a tungsten wire (100), the wire drawing mechanism comprises a wire drawing die (53), and the wire drawing die (53) is provided with a heating mechanism for drawing the tungsten wire (100) ) and a cooling mechanism for cooling the tungsten wire (100), and also includes a wire taking-up mechanism, the wire taking-up mechanism including a mounting seat (81), a belt transmission group (82), a connecting shaft (83), a wire taking-up wheel (84) and a shifting assembly, the top of the mounting frame (2) is connected to the mounting seat (81), the mounting seat (81) is rotatably connected to the connecting shaft (83), a belt transmission group (82) is arranged between the connecting shaft (83) and the rotating shaft (41), the connecting shaft (83) is slidably connected to the wire taking-up wheel (84), and a shifting assembly for controlling the wire taking-up wheel (84) to move back and forth so as to take up the wire evenly is arranged between the wire taking-up wheel (84) and the mounting seat.

2. The lanthanum-doped tungsten fine wire drawing device according to claim 1, characterized in that: The heating mechanism comprises an electric heating wire (61), a sealing plate (62), a sealing gasket (63) and an elastic member (64); the electric heating wire (61) is installed on one side of the wire drawing die (53) close to its entry port (531); the wire threading entry port (531) of the wire drawing die (53) is connected to the sealing plate (62); a wire entry hole is opened in the middle of the sealing plate (62); four sealing gaskets (63) are slidably connected to the middle of the sealing plate (62) at even intervals along the circumferential direction; and an elastic member (64) is connected between the sealing gasket (63) and the sealing plate (62).

3. The lanthanum-doped tungsten fine wire drawing device according to claim 2, characterized in that: The wire drawing mechanism also includes a connecting seat (51) and a wire drawing wheel (52), wherein the connecting seat (51) is connected to the mounting frame (2), and the wire drawing wheels (52) are rotatably connected to both sides of the mounting frame (2), wherein the wire drawing wheel (52) on one side is connected to the rotating shaft (41), and a plurality of wire drawing dies (53) are connected to both sides of the top of the connecting seat (51), and the wire drawing dies (53) on both sides are arranged in a staggered manner.

4. The lanthanum-doped tungsten fine wire drawing device according to claim 3, characterized in that: The interior of the wire drawing die (53) is composed of an inlet port (531), an extrusion channel (532), a threading channel (533), and a wire outlet port (534).

5. The lanthanum-doped tungsten fine wire drawing device according to claim 2, characterized in that: The cooling mechanism comprises an inner spiral sleeve (71) and a plugging cover (75); a cooling cavity (73) is provided in the wire drawing die (53); the cooling cavity (73) is communicated with the threading channel (533); an inner spiral sleeve (71) is provided in the cooling cavity (73); the middle part of the inner spiral sleeve (71) is hollow; two connecting channels (72) and two ventilation channels (74) are provided on the wire drawing die (53); the ends of the two connecting channels (72) are respectively communicated with the two sides of the inner spiral sleeve (71); the two ventilation channels (74) are both communicated with the cooling cavity (73); and a plugging cover (75) is provided at the end of the ventilation channel (74).

6. The lanthanum-doped tungsten fine wire drawing device according to claim 1, characterized in that: The shifting mechanism comprises a rotating disk (851), a reciprocating screw rod (852) and a gear (853); the take-up wheel (84) is rotatably connected to the rotating disk (851); the rotating disk (851) is rotatably connected to the reciprocating screw rod (852); the reciprocating screw rod (852) is slidably connected to the mounting seat (81); the upper front portion of the mounting seat (81) is rotatably connected to the gear (853); the gear (853) is connected to the reciprocating screw rod (852) via a threaded transmission; tooth grooves are evenly spaced along the circumference of the connecting shaft (83); the gear (853) meshes with the connecting shaft (83) via the tooth grooves.

7. The lanthanum-doped tungsten fine wire drawing device according to claim 1, characterized in that: The device also comprises a control mechanism, the control mechanism comprising a connecting frame (91), a sliding rod (92) and a contact switch (93), the top of the mounting frame (2) being connected to the connecting frame (91), the sliding rods (92) being evenly spaced and slidably connected to the connecting frame (91), the top of the sliding rod (92) being connected to the contact switch (93), and the bottom of the sliding rod (92) being rotatably connected to a guide wheel.

8. The lanthanum-doped tungsten fine wire drawing device according to claim 7, characterized in that: The contact switch (93) and the reduction motor (4) are both electrically connected to the controller (21).

9. A lanthanum-doped tungsten wire drawing method based on the lanthanum-doped tungsten wire drawing device according to claim 4, characterized in that: The specific steps are as follows: S1: drawing the tungsten wire through a plurality of wire drawing dies (53) and a wire guide wheel (52) in sequence, and the tungsten wire passes through the wire entry hole when passing through the wire drawing die (53); S2: When the tungsten wire passes through the wire entry hole, the sealing gasket (63) presses the tungsten wire under the action of the elastic member (64) to seal the tungsten wire; S3: the tungsten wire continues to move to the electric heating wire (61) and is heated by the electric heating wire (61). The heated tungsten wire then passes through the extrusion channel (532) so as to be extruded through the extrusion channel (532) to achieve wire drawing of the tungsten wire.

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