CN113198951A

CN113198951A - Tungsten filament cutting system

Info

Publication number: CN113198951A
Application number: CN202110494530.6A
Authority: CN
Inventors: 蒋燕; 侯静; 徐众
Original assignee: Panzhihua University
Current assignee: Panzhihua University
Priority date: 2021-05-07
Filing date: 2021-05-07
Publication date: 2021-08-03
Anticipated expiration: 2041-05-07
Also published as: CN113198951B

Abstract

The invention discloses a tungsten wire cutting system which can avoid environmental pollution. The conveying device, the workbench and the second conductive plate are sequentially arranged at intervals along the horizontal direction; the excitation coil is vertically arranged along the axial direction; the excitation coil, the permanent magnet, the cutter and the operation table are sequentially arranged from top to bottom; the permanent magnet is arranged on the cutter and corresponds to the lower end of the magnet exciting coil; the cutter is connected with the mounting seat through an elastic piece; the first current-conducting plate, the excitation coil, the power supply and the second current-conducting plate are connected through conducting wires; after the excitation coil is electrified, the magnetic pole at the lower end of the excitation coil is the same as the magnetic pole at the upper end of the permanent magnet; the cutter is linearly reciprocated along the vertical direction by the linear guide device. Compared with the background art, the method can avoid tungsten steam generated in the cutting process of the tungsten wire, is beneficial to environmental protection, and has the advantage of low cost.

Description

Tungsten filament cutting system

Technical Field

The invention belongs to the technical field of tungsten wire production equipment, and particularly relates to a tungsten wire cutting system.

Background

Tungsten has high melting point, high resistivity, high strength and good room temperature toughness, and tungsten fibers are often used as a reinforcing phase to prepare a fiber composite material to achieve the effect of toughening a matrix. For example: tungsten fiber/metallic glass composite, tungsten fiber/copper composite, tungsten fiber/tungsten composite, and the like. The tungsten fibers used in these composites are typically on the order of microns in diameter and are relatively fine. While the length is long or short, and the length of the short fibers is usually in the order of millimeters. In order to better optimize the mechanical properties of the composite material, in the laboratory bench test and pilot test development stages, the influence of tungsten fibers with different diameters and different lengths on the properties of the composite material can be researched according to experimental requirements so as to obtain the optimal parameter range of the tungsten fibers.

Commercially available tungsten wire is usually a tungsten coil, i.e., a long length of tungsten wire is wound on a drum. And pulling out the coiled tungsten wire from the end part and cutting to obtain the tungsten wire section meeting the experimental length requirement. The tungsten wire can be cut manually by a cutting tool, but the manual cutting not only easily causes the cut tungsten wire segment to be folded and curled, but also has difficulty in accurately controlling the cutting length.

A utility model patent document with publication number CN206464481U discloses a straight rod tungsten wire cutting machine. The driving motor drives the wire feeding wheel to rotate, and the wire feeding wheel and the pressing wheel play a role in drawing the tungsten wire so as to enable the tungsten wire to move towards the tungsten wire guide pipe. When the tungsten filament passing through the length metering device reaches a fixed-length value, the length metering device outputs a fixed-length signal to the control device, and then the control device drives the laser cutting device to act to cut off the tungsten filament. Under the action of the tungsten wire guide pipe, the subsequent tungsten wires are continuously transmitted, and the cut-off part of tungsten wires are jacked into the collecting device along the tungsten wire guide pipe to be collected, so that the fixed-length cutting of the tungsten wires is realized. According to the scheme, the laser cutting device is controlled by the controller to cut off the tungsten filament.

The laser cutting is to irradiate the material to be cut by using a high-power-density laser beam, so that the material to be cut is quickly heated to a vaporization temperature and evaporated to form holes, and the holes continuously form slits with narrow width along with the movement of the material by using the laser beam to complete the cutting of the material. When the tungsten filament is cut by the laser cutting device, the cut part is vaporized to form tungsten vapor to be diffused in the air, so that the environment is easily polluted. Meanwhile, the acquisition cost of the laser cutting device is high.

Disclosure of Invention

The invention aims to provide a tungsten wire cutting system which can avoid environmental pollution.

The technical scheme adopted by the invention for solving the technical problems is as follows: the tungsten wire cutting system comprises a driving piece, a conveying device and a cutting device, wherein the driving piece drives the conveying device to work; the device also comprises an operation platform;

the cutting device comprises a power supply, a first conducting plate, a second conducting plate, a magnet exciting coil, a permanent magnet and a cutter;

the first conductive plate is arranged on the workbench;

the conveying device, the workbench and the second conductive plate are sequentially arranged at intervals along the horizontal direction; one end of the operation platform adjacent to the conveying device is a feeding end, and the other end of the operation platform adjacent to the second conductive plate is a discharging end;

the excitation coil is vertically arranged along the axial direction; the excitation coil, the permanent magnet, the cutter and the operation table are sequentially arranged from top to bottom; the permanent magnet is arranged on the cutter and corresponds to the lower end of the magnet exciting coil;

the cutter is connected with the mounting seat through an elastic piece;

the first current-conducting plate, the excitation coil, the power supply and the second current-conducting plate are connected through conducting wires; after the excitation coil is electrified, the magnetic pole at the lower end of the excitation coil is the same as the magnetic pole at the upper end of the permanent magnet;

the cutter is linearly reciprocated along the vertical direction by the linear guide device.

Further, the linear guide device comprises a sliding block and a sliding groove which are in sliding fit;

the sliding block is connected with the permanent magnet; the sliding groove is vertically arranged.

Further, the device also comprises a collecting device;

the cutter is positioned right above the discharge end;

the collecting device is arranged adjacent to the discharge end and is located below a gap between the second conductive plate and the operation table.

Furthermore, the device also comprises a metal conduit with two open ends;

the metal conduit is arranged on the first conductive plate; the metal guide pipes are arranged along the direction from the feeding end to the discharging end; the outlet end of the metal conduit is flush with the discharge end of the operation table.

Further, one side, back to the operating platform, of the second current-conducting plate is connected with a linear pushing device, and the linear pushing device drives the second current-conducting plate to do linear reciprocating motion along the horizontal direction;

an insulating base plate is arranged between the linear pushing device and the second conductive plate.

Further, the insulating backing plate is a plastic product.

Further, the elastic member vertically penetrates the exciting coil.

Further, the elastic member is a spring.

Further, the first conductive plate, the second conductive plate and the metal conduit are all made of copper.

Further, the exciting coil is arranged coaxially with the permanent magnet.

Compared with the prior art, the invention has the beneficial effects that: the invention provides a tungsten wire cutting system which can avoid environmental pollution. The end part of the tungsten wire is in contact with the second conductive plate to connect a loop, and the energized excitation coil drives the permanent magnet to move downwards in a straight line, so that the cutter is driven to move downwards to cut the tungsten wire. After the tungsten wire is cut off, the loop is disconnected, and the cutter is reset under the resilience action of the elastic piece. Compared with the background art, the method can avoid tungsten steam generated in the cutting process of the tungsten wire, is beneficial to environmental protection, and has the advantage of low cost.

Drawings

FIG. 1 is a schematic structural view of the present invention;

reference numerals: 1-a working platform; 101-a feed end; 102-a discharge end; 2-a first conductive plate; 3-a second conductive plate; 4-a field coil; 5-a permanent magnet; 6-cutting tools; 7-a wire; 8-an elastic member; 9-a chute; 10-a collecting device; 11-a metal conduit; 12-a transfer wheel; 13-linear pushing means; 14-insulating backing plate; 15-a reel; 16-a power supply; 17-tungsten filament.

Detailed Description

The invention is further illustrated with reference to the following figures and examples.

As shown in the attached drawings, the tungsten wire cutting system comprises a driving part, a conveying device and a cutting device, wherein the driving part drives the conveying device to work; also comprises a workbench 1; the cutting device comprises a power supply 16, a first conductive plate 2, a second conductive plate 3, an excitation coil 4, a permanent magnet 5 and a cutter 6; the first conductive plate 2 is arranged on the workbench 1; the conveying device, the workbench 1 and the second conductive plate 3 are sequentially arranged at intervals along the horizontal direction; one end of the operation platform 1 adjacent to the conveying device is a feeding end 101, and one end of the operation platform adjacent to the second conductive plate 3 is a discharging end 102; the excitation coil 4 is vertically arranged along the axial direction; the excitation coil 4, the permanent magnet 5, the cutter 6 and the operation platform 1 are sequentially arranged from top to bottom; the permanent magnet 5 is arranged on the cutter 6 and corresponds to the lower end of the excitation coil 4; the cutter 6 is connected with the mounting seat through an elastic piece 8; the first conductive plate 2, the excitation coil 4, the power supply 16 and the second conductive plate 3 are connected through a lead 7; after the excitation coil 4 is electrified, the magnetic pole at the lower end of the excitation coil 4 is the same as the magnetic pole at the upper end of the permanent magnet 5; the cutter 6 is linearly reciprocated in the vertical direction by a linear guide.

The transfer device may adopt a structure of the background art in which two transfer wheels 12 arranged in pairs are provided. The driving piece drives one of the conveying wheels 12 to rotate, so as to drive the tungsten wire 17 on the winding drum 15 to be out of line, and the two conveying wheels 12 arranged in pairs have an alignment effect on the tungsten wire 17. The tungsten filament 17 moves from the feeding end 101 to the discharging end 102 of the workbench 1, when the end of the tungsten filament 17 is in contact with the second conductive plate 3, the loop is connected, the power supply 16 in the loop supplies power, and the excitation coil 4 is electrified to generate a magnetic field. According to the principle that the magnetic poles are the same and the magnetic poles repel each other, the permanent magnet 5 is driven by the exciting coil 4 to vertically move downwards under the cooperation of the linear guide device, and the elastic piece 8 extends to enable the cutter 6 to cut the tungsten wire 17. When the tungsten filament 17 is cut off, the circuit is opened, and the field coil 4 loses its electromagnetic property. The elastic part 8 rebounds and drives the cutter 6 to reset upwards under the matching of the linear guide device. And repeating the steps to obtain a plurality of tungsten wire sections with equal length. The mounting seat is generally disposed above the field coil 4 and provides a coupling support for the elastic member 8. The mounting base can be a plurality of existing structural forms such as ear plates, hooks and columnar structures. In the embodiment shown in the figure, the second conductive plate 3 is spaced 5mm from the table 1.

The driving piece can be a driving motor or a rocking handle. When the drive member is a drive motor, a reduction gear is usually also connected. When the driving member is a crank, the crank is manually rotated to drive the transmission wheel 12 to rotate.

The linear guide is made of a non-magnetic material such as aluminum alloy, copper, or the like. The interference of the magnetic field generated by the energizing of the exciting coil 4 to the guiding function of the linear guiding device can be effectively avoided.

The linear guide has various embodiments:

in a first embodiment, the linear guide comprises a gear and a rack which are engaged with each other, the gear is mounted on the permanent magnet 5, and the rack is vertically arranged.

In a second embodiment, the linear guide device comprises a sliding block and a sliding chute 9 which are in sliding fit; the slide block is connected with the permanent magnet 5; the chute 9 is vertically arranged.

In both embodiments, the tool 6 can be ensured to reciprocate linearly in the vertical direction.

In order to facilitate the collection of the cut tungsten wire segments, it is preferable to further include a collecting device 10; the cutter 6 is positioned right above the discharge end 102; the collecting device 10 is disposed adjacent to the discharging end 102 and below the gap between the second conductive plate 3 and the working table 1. The collecting device 10 can be connected to the work table 1 or can be mounted by means of a bracket. The cut tungsten filament sections directly fall into the collecting device 10 under the action of gravity, and the collection is convenient and rapid. The collecting device 10 may be a collecting tank.

Since the tungsten wire 17 is thin, its diameter is generally in the order of micrometers. The tungsten wire 17 is collimated by means of only two transfer wheels 12 arranged in pairs, the collimation effect being limited. Preferably, a metal conduit 11 with two open ends is also included; said metal conduit 11 is arranged on the first conductive plate 2; the metal conduit 11 is arranged in the direction from the feed end 101 to the discharge end 102; the outlet end of the metal conduit 11 is flush with the discharge end 102 of the table 1. The inlet end of the metal duct 11 corresponds to the feed end 101 and the outlet end of the metal duct 11 corresponds to the discharge end 102. The tungsten wire 17 passes through the transmission wheel 12 and enters the metal guide pipe 11, and the tungsten wire 17 is further aligned by the metal guide pipe 11. The metal pipe 11 may be welded to the first conductive plate 2, or may be connected to the first conductive plate 2 by a bolt.

In order to cut tungsten wire segments with different lengths, preferably, a linear pushing device 13 is connected to a side of the second conductive plate 3 opposite to the workbench 1, and the linear pushing device 13 drives the second conductive plate 3 to perform linear reciprocating motion along the horizontal direction; an insulating pad 14 is arranged between the linear pushing device 13 and the second conductive plate 3. Under the driving action of the linear pushing device 13, the distance between the second conductive plate 3 and the discharge end 102 of the workbench 1 along the horizontal direction is adjustable, so as to control the extension length of the tungsten filament 17. The insulating pad 14 serves as an insulator to prevent the current from being transmitted to the linear actuator 13 through the second conductive plate 3. The linear pushing device 13 may be a hydraulic rod, a pneumatic rod, or other conventional devices. The hydraulic rod and the air rod have self-locking functions, namely, the state can be kept unchanged after the hydraulic rod and the air rod are extended or shortened for a certain distance.

The insulating pad 14 may be made of rubber, and preferably, the insulating pad 14 is made of plastic. Rubber products and plastic products have good insulating property.

The elastic pieces 8 can be arranged at the outer side of the excitation coil 4, and in order to ensure that the stress is parallel, the elastic pieces 8 are in a central symmetrical structure by taking the axis of the excitation coil 4 as a central line. Preferably, the elastic member 8 vertically penetrates the field coil 4. Facilitating the mounting of the elastic member 8.

In order to improve the driving action of the excitation coil 4, it is preferable that the excitation coil 4 is arranged coaxially with the permanent magnet 5. As a further preference, the elastic member 8 is arranged coaxially with the field coil 4.

The elastic piece 8 can be a rubber rope, the permanent magnet 5 is provided with a connecting ring at the moment, and the connecting ring can be welded on the permanent magnet 5 or can be integrally formed with the permanent magnet 5. The upper end of the rubber rope is connected with the mounting seat in the form of an ear plate or a hook, and the lower end of the rubber rope is connected with the connecting ring on the permanent magnet 5. Preferably, the elastic member 8 is a spring. The upper end of the spring is welded with the mounting seat of the columnar structure, and the lower end of the spring is welded with the permanent magnet 5.

The first conductive plate 2, the second conductive plate 3 and the metal conduit 11 may be made of aluminum, and preferably, the first conductive plate 2, the second conductive plate 3 and the metal conduit 11 are made of copper.

In the embodiment shown in the figures, the conveyors are arranged in two groups spaced apart in the horizontal direction. The collimation effect on the tungsten filament 17 is further improved.

The above is a specific implementation manner of the present invention, and it can be seen from the implementation process that the present invention provides a tungsten wire cutting system, which can avoid environmental pollution. The end part of the tungsten wire is in contact with the second conductive plate to connect a loop, and the energized excitation coil drives the permanent magnet to move downwards in a straight line, so that the cutter is driven to move downwards to cut the tungsten wire. After the tungsten wire is cut off, the loop is disconnected, and the cutter is reset under the resilience action of the elastic piece. Compared with the background art, the method can avoid tungsten steam generated in the cutting process of the tungsten wire, is beneficial to environmental protection, and has the advantage of low cost.

Claims

1. The tungsten wire cutting system comprises a driving piece, a conveying device and a cutting device, wherein the driving piece drives the conveying device to work; the method is characterized in that: also comprises a workbench (1);

the cutting device comprises a power supply (16), a first conducting plate (2), a second conducting plate (3), an excitation coil (4), a permanent magnet (5) and a cutter (6);

the first conductive plate (2) is arranged on the workbench (1);

the conveying device, the workbench (1) and the second conductive plate (3) are sequentially arranged at intervals along the horizontal direction; one end of the operation platform (1) adjacent to the conveying device is a feeding end (101), and one end of the operation platform adjacent to the second conductive plate (3) is a discharging end (102);

the magnet exciting coil (4) is vertically arranged along the axial direction; the excitation coil (4), the permanent magnet (5), the cutter (6) and the operation platform (1) are sequentially arranged from top to bottom; the permanent magnet (5) is arranged on the cutter (6) and corresponds to the lower end of the magnet exciting coil (4);

the cutter (6) is connected with the mounting seat through an elastic piece (8);

the first conductive plate (2), the excitation coil (4), the power supply (16) and the second conductive plate (3) are connected through a lead (7); after the excitation coil (4) is electrified, the magnetic pole at the lower end of the excitation coil (4) is the same as the magnetic pole at the upper end of the permanent magnet (5);

the cutter (6) is linearly reciprocated along the vertical direction through a linear guide device.

2. The tungsten wire cutting system of claim 1, wherein: the linear guide device comprises a sliding block and a sliding groove (9) which are in sliding fit;

the slide block is connected with the permanent magnet (5); the sliding groove (9) is vertically arranged.

3. The tungsten wire cutting system of claim 1, wherein: further comprising a collecting device (10);

the cutter (6) is positioned right above the discharge end (102);

the collecting device (10) is arranged adjacent to the discharging end (102) and is located below a gap between the second conductive plate (3) and the operation platform (1).

4. The tungsten wire cutting system of claim 1, wherein: the device also comprises a metal conduit (11) with two open ends;

the metal conduit (11) is arranged on the first conductive plate (2); the metal conduit (11) is arranged along the direction from the feeding end (101) to the discharging end (102); the outlet end of the metal conduit (11) is flush with the discharge end (102) of the operation platform (1).

5. The tungsten wire cutting system of claim 1, wherein: one side of the second conductive plate (3), which is opposite to the workbench (1), is connected with a linear pushing device (13), and the linear pushing device (13) drives the second conductive plate (3) to do linear reciprocating motion along the horizontal direction;

an insulating pad (14) is arranged between the linear pushing device (13) and the second conductive plate (3).

6. The tungsten wire cutting system of claim 5, wherein: the insulating backing plate (14) is a plastic product.

7. The tungsten wire cutting system of claim 1, wherein: the elastic piece (8) vertically penetrates through the magnet exciting coil (4).

8. The tungsten wire cutting system of claim 1, wherein: the elastic piece (8) is a spring.

9. The tungsten wire cutting system of claim 4, wherein: the first conductive plate (2), the second conductive plate (3) and the metal conduit (11) are all made of copper.

10. The tungsten wire cutting system of claim 1, wherein: the magnet exciting coil (4) and the permanent magnet (5) are arranged coaxially.