CN114015850A - Double-tungsten-rod simultaneous annealing equipment and annealing process thereof - Google Patents
Double-tungsten-rod simultaneous annealing equipment and annealing process thereof Download PDFInfo
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- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 168
- 239000010937 tungsten Substances 0.000 claims abstract description 168
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 165
- 238000007599 discharging Methods 0.000 claims abstract description 103
- 230000007246 mechanism Effects 0.000 claims abstract description 43
- 238000010438 heat treatment Methods 0.000 claims abstract description 28
- 238000007514 turning Methods 0.000 claims abstract description 25
- 230000005540 biological transmission Effects 0.000 claims abstract description 22
- 238000001514 detection method Methods 0.000 claims abstract description 20
- 238000001816 cooling Methods 0.000 claims abstract description 15
- 229910052739 hydrogen Inorganic materials 0.000 claims description 51
- 239000001257 hydrogen Substances 0.000 claims description 51
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 50
- 230000006698 induction Effects 0.000 claims description 30
- 239000000498 cooling water Substances 0.000 claims description 26
- 238000003825 pressing Methods 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 14
- 230000003111 delayed effect Effects 0.000 claims description 5
- 239000011521 glass Substances 0.000 claims description 3
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- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 3
- 238000010791 quenching Methods 0.000 description 3
- 230000000171 quenching effect Effects 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
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- C—CHEMISTRY; METALLURGY
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- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
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- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
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- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
- C21D1/42—Induction heating
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- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0062—Heat-treating apparatus with a cooling or quenching zone
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- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
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- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
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Abstract
The invention discloses double-tungsten-rod simultaneous annealing equipment and an annealing process thereof, and aims to solve the technical problems of large occupied area, high power consumption, low automation degree, low production efficiency, high labor intensity and the like of the traditional tungsten-rod annealing equipment. The annealing equipment comprises an automatic feeding mechanism, a feeding pinch roller, a tungsten rod detection turning plate, a heating and cooling system, an automatic discharging mechanism and an electric control cabinet, wherein the automatic feeding mechanism, the feeding pinch roller, the tungsten rod detection turning plate, the heating and cooling system and the automatic discharging mechanism are sequentially arranged according to the tungsten rod transmission sequence; the annealing equipment and the annealing process can quickly and efficiently eliminate the internal stress generated by the previous process of the tungsten rod, and avoid the defects of splitting, brittle fracture and the like possibly occurring in the subsequent processing so as to improve the processing performance of the tungsten rod.
Description
Technical Field
The invention belongs to the technical field of metal heat treatment, particularly belongs to the field of deep processing of metal tungsten, and particularly relates to a double-tungsten-rod simultaneous annealing device and an annealing process thereof.
Background
Tungsten is widely applied to various fields such as military industry, metallurgy, aviation, aerospace, ships, nuclear energy, electronics, chemical industry, medical treatment, machining and the like because of a series of excellent and unique physical, mechanical and chemical properties such as high melting point, high density, high hardness, high wear resistance, high electrical conductivity, high thermal conductivity, high electron emission capability, high elastic modulus, low linear expansion coefficient, high temperature creep resistance, diamagnetism and the like.
In the processing process of rolling and swaging the tungsten rod, crystal grains in the tungsten rod can slide and twingrow, the shape, size and orientation of the crystal grains change, from the energy point of view, the processing process of the tungsten rod is an unstable state in which the internal energy can be continuously increased, a large amount of dislocation is generated in the tungsten rod due to processing deformation, a large amount of internal stress is accumulated, and when stress of a part of area is concentrated, the subsequent processing of the tungsten rod can have the defects of splitting, brittle fracture and the like. Therefore, a technical problem to be solved by those skilled in the art of tungsten deep processing is how to rapidly and efficiently eliminate the internal stress of the tungsten rod caused by processing so as to restore the broken grain structure to the original complete grain structure state.
In the field of deep processing of tungsten materials, a technology for eliminating internal stress of a tungsten rod is generally processed in an annealing mode, and electron tube high-frequency annealing equipment is generally adopted for annealing the tungsten rod; the high frequency of the electron tube is rectified by 380V AC voltage regulation, boosted to 10KV and inverted to be high frequency AC electric energy of about 100Khz, and the electric conversion efficiency of the whole device is less than 50%. Its electricity conversion efficiency is too low, and not only there is very big electric energy waste like this, and moreover, current annealing equipment is bulky, and degree of automation is low simultaneously, and required hand labor is more to required preheating time is longer, thereby has leaded to its operating efficiency low, the energy consumption is high, the trouble is many, has restricted the high-efficient processing of tungsten material, consequently, needs to break through the improvement urgently.
Disclosure of Invention
(1) Technical problem to be solved
Aiming at the defects of the prior art, the invention aims to provide a double-tungsten-rod simultaneous annealing device and an annealing process thereof, and the annealing device and the process aim to solve the technical problems of large occupied area, high power consumption, low automation degree, high labor intensity, low production efficiency and high failure rate of the traditional tungsten rod annealing.
(2) Technical scheme
In order to solve the technical problem, the invention provides double-tungsten-rod simultaneous annealing equipment which comprises an automatic feeding mechanism, a feeding pressing wheel, a tungsten-rod detection turning plate, a heating and cooling system, an automatic discharging mechanism and an electric control cabinet, wherein the automatic feeding mechanism, the feeding pressing wheel, the tungsten-rod detection turning plate, the heating and cooling system and the automatic discharging mechanism are sequentially arranged according to the tungsten-rod transmission sequence;
the automatic feeding mechanism comprises a tooth-shaped feeding frame, a feeding overturning stepping motor, a feeding transmission shaft, a feeding bevel gear and a feeding roller, wherein the feeding overturning stepping motor, the feeding transmission shaft, the feeding bevel gear and the feeding roller are all arranged on the tooth-shaped feeding frame;
the heating and cooling system comprises an IGBT superaudio power supply, an induction coil, a hydrogen annealing box and a cooling water jacket, wherein the hydrogen annealing box is arranged between the feeding and the discharging of the heating and cooling system;
the automatic discharging mechanism comprises a discharging pinch roller, a discharging leading-out guide rail, a discharging leading-out slider, a discharging guide groove, a tungsten rod collecting frame, a discharging overturning stepping motor and a discharging leading-out cylinder, wherein the discharging pinch roller, the discharging leading-out guide rail, the discharging leading-out slider, the discharging guide groove, the discharging overturning stepping motor and the discharging leading-out cylinder are all arranged on the tungsten rod collecting frame;
the feeding pinch roller and the discharging pinch roller are driven by the same feeding motor, the feeding pinch roller and the discharging pinch roller are respectively a front pinch roller and a rear pinch roller (8 groups of pinch rollers in total), each pinch roller is provided with an upper group of gears and a lower group of gears, and a pressing cylinder is arranged above each pinch roller (when a tungsten rod passes through the pressing cylinder, the upper pressing cylinder presses the tungsten rod to move forward, and the lower gears of the pinch rollers drive the pinch rollers to operate through a helical gear, a transmission shaft and the feeding motor);
the tungsten rod detection turning plates are respectively arranged on two sides of the left feeding pressing wheel group and the right feeding pressing wheel group;
in its structure, proximity switch is connected with electrical system, the PLC control system in the proximity switch signal transmission automatically controlled cabinet, PLC control system controls the automatic time delay of heating of IGBT super audio power according to proximity switch tungsten bar detected signal and starts and the automatic time delay of heating stops, programming through PLC control system, control two sets of material feeding unit and only need one of them group to detect the tungsten bar, time delay starts the heating promptly, when controlling two sets of material feeding unit and all not detecting the tungsten bar, time delay stops the heating promptly, realize that two tungsten bars open the automatic of annealing simultaneously and stop.
The electric control cabinet is internally provided with a PLC control system for respectively controlling the starting and stopping of the feeding motor, the automatic feeding mechanism, the automatic discharging mechanism and the IGBT superaudio frequency power supply, and is electrically connected with the feeding motor, the automatic feeding mechanism, the automatic discharging mechanism, the IGBT superaudio frequency power supply and the proximity switch.
Before annealing, the weight of each tungsten rod is 2-3 kg/root, the length of each tungsten rod is 1.6-2.5 m, and the diameter of each tungsten rod is 8-10 mm, the structure can enable the automatic feeding mechanism to simultaneously place 40 tungsten rods with the length of 1.6-2.5 m, and enable the tungsten rod collecting frame to simultaneously place 80 tungsten rods with the length of 1.6-2.5 m after annealing.
Preferably, the front surface of the hydrogen annealing box is provided with a glass observation hole for measuring the temperature of the annealed tungsten rod.
Preferably, the induction coil is an oval structure with inner dimension (225 ± 2) × (45 ± 2) mm, and the length is 120-160 mm.
Meanwhile, the ultrasonic power supply can adopt a digital phase-locked loop tracking and control technology, the ultrasonic power supply is inverted into about 10-30 KHZ ultrasonic current through an IGBT after three-phase AC380V voltage rectification and filtering, the ultrasonic current is sent into an LC series oscillation loop, and the power is output by a quenching transformer.
The invention also provides a process for simultaneously annealing the double tungsten rods, which is carried out by the equipment for simultaneously annealing the double tungsten rods and comprises the following specific steps:
step one, introducing hydrogen into an annealing box of the double-tungsten-bar simultaneous annealing equipment through a hydrogen flowmeter by a hydrogen pipeline, and evacuating before annealing, wherein the hydrogen flow is (0.7 +/-0.1) m3H, exhausting hydrogen for 8-12min, and turning on the IGBT superaudio power supply, the induction coil,Cooling water valves of the annealing box and the cooling water jacket, wherein the pressure of the cooling water is 0.2-0.5 MPa;
secondly, placing tungsten rods before annealing on a tooth-shaped feeding frame arranged on the left and right of an automatic feeding mechanism at the left and right sides simultaneously, starting a power supply, rotating the angle of the material level of one tungsten rod by a feeding overturning stepping motor, driving the tooth-shaped feeding frame to overturn the tungsten rods onto a feeding roller through a feeding transmission shaft, driving the tungsten rods to move forward to a feeding pressing wheel by the feeding roller, transmitting a proximity switch signal to an electric control system to drive the pressing wheel to press down and move forward after the tungsten rods move forward to a tungsten rod detection turning plate, transmitting a signal to the electric control system by the detection turning plate proximity switch, starting an IGBT superaudio power supply in a delayed mode, outputting power of the IGBT superaudio power supply to an induction coil in a hydrogen annealing box, and carrying out high-temperature heating annealing on the tungsten rods by the induction coil protected by hydrogen in the annealing box;
and step three, the tungsten rods after the annealing on the left side and the right side are transmitted to a discharging pinch roller through a cooling water jacket by a feeding pinch roller, after the tail parts of the tungsten rods completely pass through the discharging pinch roller, a cylinder magnetic switch above the discharging pinch roller detects a tungsten rod tail part signal, the signal is transmitted to a PLC control system in an electric control cabinet, a discharging leading-out cylinder is controlled, the discharging leading-out cylinder drives a discharging guide groove, a discharging leading-out guide rail and a discharging leading-out sliding block to drive the tungsten rods to continuously advance by 100-200 mm, and then a discharging overturning stepping motor is controlled to overturn the annealed tungsten rods onto a tungsten rod collecting rack, so that the tungsten rod annealing is completed.
Preferably, in the second step, the annealing temperature of the two tungsten rods in the induction coil is controlled to be the set temperature between 1800 ℃ and 2500 ℃ by adjusting the output power of the IGBT superaudio power supply.
Preferably, in the second step, the speed of the feeding motor is controlled, and the annealing speed of the tungsten rod is controlled to be 0.3-0.6 m/min.
The annealing equipment and the annealing process can quickly and efficiently eliminate the internal stress generated by the previous process of the tungsten rod, and avoid the defects of splitting, brittle fracture and the like possibly occurring in the subsequent processing so as to improve the processing performance of the tungsten rod.
(3) Advantageous effects
Compared with the prior art, the invention has the beneficial effects that:
firstly, the double-tungsten-rod simultaneous annealing device enables the left tungsten rod and the right tungsten rod to enter the annealing coil with hydrogen protection at the same time, so that the double-tungsten-rod simultaneous annealing is realized, and the annealing efficiency of a single device is improved by 100%; secondly, the invention adopts the superaudio power supply to replace the high frequency of the electronic tube, the superaudio power supply is inverted into about 10 to 30KHZ superaudio current through IGBT (insulated gate bipolar transistor) after being rectified and filtered by three-phase AC380V voltage, and is sent into an LC series oscillation circuit, the quenching transformer outputs power to the annealing induction coil, the electrical conversion efficiency of the whole equipment is more than 90 percent, when the tungsten rod passes through the induction coil, induced current (eddy current) with the same frequency and opposite direction as the induction coil is generated, so that electric energy is converted into heat energy, the surface of the tungsten rod is rapidly heated, the skin effect is utilized to enable the interior of the tungsten rod to reach the annealing temperature, the stress generated in the tungsten rod is rapidly eliminated, and through statistics, when the annealing temperature is 2350 ℃, the comparison is carried out, the power consumption of a unit product is reduced to 0.9Kwh/kg from 1.9Kwh/kg of the high frequency of the original electron tube, and the power consumption is reduced by 52 percent; thirdly, the tooth-shaped feeding frame and the discharging collecting frame which can intensively place the tungsten rods are adopted, the feeding and discharging operation time of the device is shortened, operators can be started by other process personnel, the operators do not need to be attended by special persons, the production cost is reduced, and the production efficiency is improved; finally, the invention designs the tungsten rod annealing automatic start-stop device by the annealing automatic start-stop device, because the IGBT superaudio power supply does not need to be preheated, the device can be used after being started, after the superaudio power supply is started, when the tungsten rod is detected to enter the annealing area, the superaudio power supply is automatically started, and when the tungsten rod leaves the annealing area and no tungsten rod enters, the superaudio power supply is automatically closed, so that the standby electric energy waste of the device is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, it is obvious that the drawings in the following description are only one embodiment of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of a double-tungsten-rod simultaneous annealing device according to the present invention.
Fig. 2 is a front view of fig. 1.
Fig. 3 is a top view of fig. 1.
The labels in the figures are: 1-tungsten bar before annealing, 2-tooth-shaped feeding frame, 3-feeding overturning stepping motor, 4-feeding transmission shaft, 5-feeding bevel gear, 6-feeding roller, 7-feeding pinch roller, 8-tungsten bar detection turning plate, 9-IGBT superaudio power supply, 10-induction coil, 11-hydrogen annealing box, 12-cooling water jacket, 13-discharging pinch roller, 14-annealed tungsten bar, 15-discharging leading-out guide rail, 16-discharging guide groove, 17-tungsten bar collecting frame, 18-discharging leading-out slide block, 19-discharging overturning stepping motor, 20-discharging leading-out cylinder and 21-electric control cabinet.
Detailed Description
In order to make the technical means, the original characteristics, the achieved purposes and the effects of the invention easily understood and obvious, the technical solutions in the embodiments of the present invention are clearly and completely described below to further illustrate the invention, and obviously, the described embodiments are only a part of the embodiments of the present invention, but not all the embodiments.
The present embodiment is a double tungsten rod simultaneous annealing apparatus, the structural schematic diagram of the apparatus is shown in fig. 1, fig. 2 is a front view of fig. 1, and fig. 3 is a top view of fig. 1; the annealing equipment comprises an automatic feeding mechanism, a feeding pressing wheel 7, a tungsten rod detection turning plate 8, a heating and cooling system, an automatic discharging mechanism and an electric control cabinet 21, wherein the automatic feeding mechanism, the feeding pressing wheel 7, the tungsten rod detection turning plate 8, the heating and cooling system and the automatic discharging mechanism are sequentially arranged according to the tungsten rod transmission sequence. Wherein, two sets of settings side by side about the automatic feed mechanism, and the automatic feed mechanism is including profile of tooth feeding frame 2, feeding upset step motor 3, feeding transmission shaft 4, pay-off helical gear 5, pay-off gyro wheel 6 all install on profile of tooth feeding frame 2, feeding upset step motor 3 passes through feeding transmission shaft 4 and is connected with pay-off helical gear 5, pay-off helical gear 5 is connected with pay-off gyro wheel 6 transmission.
Before annealing, the weight of each tungsten rod 1 is 2-3 kg/root, the length is 1.6-2.5 m, and the diameter is 8-10 mm, the structure can enable the automatic feeding mechanism to simultaneously place 40 tungsten rods with the length of 1.6-2.5 m, and enable the tungsten rod collecting frame 17 to simultaneously place 80 tungsten rods with the length of 1.6-2.5 m after annealing.
The heating and cooling system comprises an IGBT superaudio power supply 9, an induction coil 10, a hydrogen annealing box 11 and a cooling water jacket 12, wherein the hydrogen annealing box 11 is arranged between the feeding and the discharging of the heating and cooling system, the induction coil 10 is fixedly arranged in the hydrogen annealing box 11 and is connected to the IGBT superaudio power supply 9 by adopting a water-cooling copper bar, the front end of the hydrogen annealing box 11 is provided with double feeding grooves, the rear end of the hydrogen annealing box 11 is connected with the cooling water jacket 12, the inside of the cooling water jacket 12 is provided with double discharging grooves, and a hydrogen connecting pipeline is arranged above the hydrogen annealing box 11; the front of the hydrogen annealing box 11 is provided with a glass observation hole for measuring the temperature of the annealing tungsten rod, and the induction coil 10 is of an oval structure with the inner dimension (225 +/-2) × (45 +/-2) mm and the length of 120-160 mm.
Two sets of side by side settings about automatic discharging mechanism, and automatic discharging mechanism is including ejection of compact pinch roller 13, the guide rail 15 is drawn forth in the ejection of compact, the slider 18 is drawn forth in the ejection of compact, ejection of compact guide slot 16, tungsten bar collection work or material rest 17, ejection of compact upset step motor 19, the cylinder 20 is drawn forth in the ejection of compact, ejection of compact pinch roller 13, the guide rail 15 is drawn forth in the ejection of compact, the slider 18 is drawn forth in the ejection of compact, ejection of compact guide slot 16, ejection of compact upset step motor 19 and ejection of compact are drawn forth the cylinder 20 and are all installed on tungsten bar collection work or material rest 17, be provided with ejection of compact guide slot 16 on the ejection of compact is drawn forth on guide rail 15, be provided with the ejection of compact in the ejection of compact and draw forth slider 18 in the ejection of compact and draw forth cylinder 20 transmission and be connected, ejection of compact upset step motor 19 sets up in the rear end that tungsten bar transmission of compact collection work or material rest 17 tungsten bars.
Feeding pinch roller 7 and ejection of compact pinch roller 13 are by same feeding motor transmission, and feeding pinch roller 7 respectively is two sets of pinch rollers around with ejection of compact pinch roller 13, close 8 pinch rollers of having counted like this, and two sets of gears about each pinch roller all is provided with, and each pinch roller top respectively is provided with compresses tightly the cylinder, and when the tungsten stick passes through, the cylinder that compresses tightly of top compresses tightly the tungsten stick and gos forward, and the lower gear of pinch roller passes through helical gear, transmission shaft and feeding motor drive the operation of pinch roller.
The tungsten rod detection turning plates are respectively arranged on two sides of the left feeding pressing wheel group and the right feeding pressing wheel group; a PLC control system used for respectively controlling the starting and stopping of the feeding motor, the automatic feeding mechanism, the automatic discharging mechanism and the IGBT superaudio frequency power supply 9 is arranged in the electric control cabinet 21, and the electric control cabinet 21 is electrically connected with the feeding motor, the automatic feeding mechanism, the automatic discharging mechanism, the IGBT superaudio frequency power supply 9 and the proximity switch respectively.
In its structure, proximity switch and automatically controlled cabinet 21 electrical connection, the PLC control system in the proximity switch signal transmission automatically controlled cabinet 21, PLC control system controls the automatic time delay of the heating of IGBT super audio power 9 according to proximity switch tungsten bar detected signal and starts and the automatic time delay of heating stops, programming through PLC control system, control two sets of material feeding unit and only need one of them group to detect the tungsten bar, time delay starts the heating promptly, when controlling two sets of material feeding unit and all not detecting the tungsten bar, time delay stops the heating promptly, realize that the automation of two tungsten bars annealing stops opening simultaneously.
Meanwhile, the ultrasonic power supply can adopt a digital phase-locked loop tracking and control technology, the ultrasonic power supply is inverted into ultrasonic current of about 10-30 KHZ through an IGBT after three-phase AC380V voltage rectification and filtering, the ultrasonic current is sent into an LC series oscillation loop, and power is output by a quenching transformer.
Example 1
The annealing is carried out by aiming at the double-tungsten-bar simultaneous annealing equipment, and the process comprises the following specific steps:
step one, introducing hydrogen into an annealing box of the double-tungsten-bar simultaneous annealing equipment through a hydrogen flowmeter by a hydrogen pipeline, and evacuating before annealing, wherein the hydrogen flow is 0.6m3And h, the hydrogen evacuation time is 12min, and cooling water valves of the IGBT superaudio power supply 9, the induction coil 10, the annealing box and the cooling water jacket 12 are opened, wherein the pressure of the cooling water is 0.2 MPa.
Secondly, placing tungsten rods 1 before annealing on a tooth-shaped feeding frame arranged on the left and right of an automatic feeding mechanism at the same time on the left and right sides, starting a power supply, rotating a tungsten rod material level angle by a feeding overturning stepping motor 3, driving the tooth-shaped feeding frame 2 to overturn the tungsten rods onto a feeding roller 6 through a feeding transmission shaft 4, driving the tungsten rods to advance to a feeding pinch roller 7 by the feeding roller 6, transmitting a signal to an electric control system by a proximity switch after the feeding pinch roller 7 detects a tungsten rod signal to drive the pinch roller to press downwards to advance, transmitting a signal to the electric control system by the proximity switch of a detection turning plate after the tungsten rods advance to a tungsten rod detection turning plate 8, starting an IGBT superaudio power supply 9 in a delayed mode, outputting power to an induction coil 10 in a hydrogen annealing box 11 by the IGBT superaudio power supply 9, and carrying out high-temperature heating annealing on the tungsten rods by the induction coil 10 protected by hydrogen in the annealing box; controlling the annealing temperatures of two tungsten rods in the induction coil 10 to be 1800-2500 ℃ by adjusting the output power of the IGBT superaudio frequency power supply 9; the speed of a feeding motor is controlled, and the annealing speed of the tungsten rod is controlled to be 0.6 m/min.
And step three, the tungsten rods after the annealing on the left side and the right side are transmitted to a discharging pinch roller 13 through a cooling water jacket 12 by a feeding pinch roller 7, after the tail parts of the tungsten rods completely pass through the discharging pinch roller 13, a cylinder magnetic switch above the discharging pinch roller 13 detects a tungsten rod tail part signal, the signal is transmitted to a PLC control system in an electric control cabinet 21 to control a discharging leading-out cylinder 20, the discharging leading-out cylinder 20 drives a discharging guide groove 16, a discharging leading-out guide rail 15 and a discharging leading-out sliding block 18 to drive the tungsten rods to continuously advance by 100mm, and then a discharging overturning stepping motor 19 is controlled to overturn the annealed tungsten rods 14 onto a tungsten rod collecting rack 17, so that the tungsten rod annealing is completed.
Example 2
The annealing is carried out by aiming at the double-tungsten-bar simultaneous annealing equipment, and the process comprises the following specific steps:
step one, introducing hydrogen into an annealing box of the double-tungsten-bar simultaneous annealing equipment through a hydrogen flowmeter by a hydrogen pipeline, and evacuating before annealing, wherein the hydrogen flow is 0.7m3And h, the hydrogen evacuation time is 10min, and cooling water valves of the IGBT superaudio power supply 9, the induction coil 10, the annealing box and the cooling water jacket 12 are opened, wherein the pressure of the cooling water is 0.4 MPa.
Secondly, placing tungsten rods 1 before annealing on a tooth-shaped feeding frame arranged on the left and right of an automatic feeding mechanism at the same time on the left and right sides, starting a power supply, rotating a tungsten rod material level angle by a feeding overturning stepping motor 3, driving the tooth-shaped feeding frame 2 to overturn the tungsten rods onto a feeding roller 6 through a feeding transmission shaft 4, driving the tungsten rods to advance to a feeding pinch roller 7 by the feeding roller 6, transmitting a signal to an electric control system by a proximity switch after the feeding pinch roller 7 detects a tungsten rod signal to drive the pinch roller to press downwards to advance, transmitting a signal to the electric control system by the proximity switch of a detection turning plate after the tungsten rods advance to a tungsten rod detection turning plate 8, starting an IGBT superaudio power supply 9 in a delayed mode, outputting power to an induction coil 10 in a hydrogen annealing box 11 by the IGBT superaudio power supply 9, and carrying out high-temperature heating annealing on the tungsten rods by the induction coil 10 protected by hydrogen in the annealing box; controlling the annealing temperatures of two tungsten rods in the induction coil 10 to be 2100 ℃ by adjusting the output power of the IGBT superaudio frequency power supply 9; controlling the speed of a feeding motor, and controlling the tungsten rod annealing speed to be 0.5 m/min.
And step three, the tungsten rod after the annealing on the left side and the right side passes through the cooling water jacket 12 and is transmitted to the discharging pinch roller 13 by the feeding pinch roller 7, after the tail of the tungsten rod completely passes through the discharging pinch roller 13, a cylinder magnetic switch above the discharging pinch roller 13 detects a tungsten rod tail signal and transmits the signal to a PLC control system in an electric control cabinet 21 to control a discharging leading-out cylinder 20, the discharging leading-out cylinder 20 drives a discharging guide groove 16, a discharging leading-out guide rail 15 and a discharging leading-out sliding block 18 to drive the tungsten rod to continuously advance by 150mm, and then a discharging turning stepping motor 19 is controlled to turn the annealed tungsten rod 14 onto a tungsten rod collecting frame 17, so that the tungsten rod annealing is completed.
Example 3
The annealing is carried out by aiming at the double-tungsten-bar simultaneous annealing equipment, and the process comprises the following specific steps:
step one, introducing hydrogen into an annealing box of the double-tungsten-bar simultaneous annealing equipment through a hydrogen flowmeter by a hydrogen pipeline, and evacuating before annealing, wherein the hydrogen flow is 0.8m3And h, the hydrogen evacuation time is 8min, and cooling water valves of the IGBT superaudio power supply 9, the induction coil 10, the annealing box and the cooling water jacket 12 are opened, wherein the pressure of the cooling water is 0.5 MPa.
Secondly, placing tungsten rods 1 before annealing on a tooth-shaped feeding frame arranged on the left and right of an automatic feeding mechanism at the same time on the left and right sides, starting a power supply, rotating a tungsten rod material level angle by a feeding overturning stepping motor 3, driving the tooth-shaped feeding frame 2 to overturn the tungsten rods onto a feeding roller 6 through a feeding transmission shaft 4, driving the tungsten rods to advance to a feeding pinch roller 7 by the feeding roller 6, transmitting a signal to an electric control system by a proximity switch after the feeding pinch roller 7 detects a tungsten rod signal to drive the pinch roller to press downwards to advance, transmitting a signal to the electric control system by the proximity switch of a detection turning plate after the tungsten rods advance to a tungsten rod detection turning plate 8, starting an IGBT superaudio power supply 9 in a delayed mode, outputting power to an induction coil 10 in a hydrogen annealing box 11 by the IGBT superaudio power supply 9, and carrying out high-temperature heating annealing on the tungsten rods by the induction coil 10 protected by hydrogen in the annealing box; controlling the annealing temperatures of two tungsten rods in the induction coil 10 to be 2500 ℃ by adjusting the output power of the IGBT superaudio frequency power supply 9; controlling the speed of a feeding motor, and controlling the tungsten rod annealing speed to be 0.3 m/min.
And step three, the tungsten rod after the annealing on the left side and the right side passes through the cooling water jacket 12 and is transmitted to the discharging pinch roller 13 by the feeding pinch roller 7, after the tail of the tungsten rod completely passes through the discharging pinch roller 13, a cylinder magnetic switch above the discharging pinch roller 13 detects a tungsten rod tail signal and transmits the signal to a PLC control system in an electric control cabinet 21 to control a discharging leading-out cylinder 20, the discharging leading-out cylinder 20 drives a discharging guide groove 16, a discharging leading-out guide rail 15 and a discharging leading-out sliding block 18 to drive the tungsten rod to continuously advance by 200mm, and then a discharging turning stepping motor 19 is controlled to turn the annealed tungsten rod 14 onto a tungsten rod collecting frame 17, so that the tungsten rod annealing is completed.
Generally, the annealing equipment and the annealing process can quickly and efficiently eliminate the internal stress generated by the previous process of the tungsten rod, and avoid the defects of splitting, brittle fracture and the like possibly occurring in the subsequent processing so as to improve the processing performance of the tungsten rod.
Having thus described the principal technical features and basic principles of the invention, and the advantages associated therewith, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description is described in terms of various embodiments, not every embodiment includes only a single embodiment, and such descriptions are provided for clarity only, and those skilled in the art will recognize that the embodiments described herein can be combined as a whole to form other embodiments as would be understood by those skilled in the art.
Claims (6)
1. The double-tungsten-rod simultaneous annealing equipment is characterized by comprising an automatic feeding mechanism, a feeding pressing wheel, a tungsten-rod detecting turning plate, a heating and cooling system, an automatic discharging mechanism and an electric control cabinet, wherein the automatic feeding mechanism, the feeding pressing wheel, the tungsten-rod detecting turning plate, the heating and cooling system and the automatic discharging mechanism are sequentially arranged according to the tungsten-rod transmission sequence;
the automatic feeding mechanism comprises a tooth-shaped feeding frame, a feeding overturning stepping motor, a feeding transmission shaft, a feeding bevel gear and a feeding roller, wherein the feeding overturning stepping motor, the feeding transmission shaft, the feeding bevel gear and the feeding roller are all arranged on the tooth-shaped feeding frame;
the heating and cooling system comprises an IGBT superaudio power supply, an induction coil, a hydrogen annealing box and a cooling water jacket, wherein the hydrogen annealing box is arranged between the feeding and the discharging of the heating and cooling system;
the automatic discharging mechanism comprises a discharging pinch roller, a discharging leading-out guide rail, a discharging leading-out slider, a discharging guide groove, a tungsten rod collecting frame, a discharging overturning stepping motor and a discharging leading-out cylinder, wherein the discharging pinch roller, the discharging leading-out guide rail, the discharging leading-out slider, the discharging guide groove, the discharging overturning stepping motor and the discharging leading-out cylinder are all arranged on the tungsten rod collecting frame;
the feeding pinch roller and the discharging pinch roller are driven by the same feeding motor, the feeding pinch roller and the discharging pinch roller are respectively a front pinch roller and a rear pinch roller, each pinch roller is provided with an upper group of gears and a lower group of gears, and a pressing cylinder is arranged above each pinch roller;
the tungsten rod detection turning plates are respectively arranged on two sides of the left feeding pressing wheel group and the right feeding pressing wheel group;
the electric control cabinet is internally provided with a PLC control system for respectively controlling the starting and stopping of the feeding motor, the automatic feeding mechanism, the automatic discharging mechanism and the IGBT superaudio frequency power supply, and is electrically connected with the feeding motor, the automatic feeding mechanism, the automatic discharging mechanism, the IGBT superaudio frequency power supply and the proximity switch.
2. The equipment for simultaneously annealing double tungsten rods according to claim 1, wherein the front surface of the hydrogen annealing box is provided with a glass observation hole for measuring the temperature of the annealed tungsten rods.
3. The apparatus of claim 1, wherein the induction coil has an oval structure with an inner dimension of 25 ± 2 x 45 ± 2mm and a length of 120-160 mm.
4. A process for simultaneously annealing double tungsten rods is characterized in that the process applies the equipment for simultaneously annealing double tungsten rods as claimed in any one of claims 1 to 3, and comprises the following specific steps:
step one, introducing hydrogen into an annealing box of the double-tungsten-bar simultaneous annealing equipment through a hydrogen flowmeter by a hydrogen pipeline, and evacuating before annealing, wherein the hydrogen flow is (0.7 +/-0.1) m3H, evacuating hydrogen for 8-12min, and opening cooling water valves of the IGBT superaudio power supply, the induction coil, the annealing box and the cooling water jacket, wherein the pressure of the cooling water is 0.2-0.5 MPa;
secondly, placing tungsten rods before annealing on a tooth-shaped feeding frame arranged on the left and right of an automatic feeding mechanism at the left and right sides simultaneously, starting a power supply, rotating the angle of the material level of one tungsten rod by a feeding overturning stepping motor, driving the tooth-shaped feeding frame to overturn the tungsten rods onto a feeding roller through a feeding transmission shaft, driving the tungsten rods to move forward to a feeding pressing wheel by the feeding roller, transmitting a proximity switch signal to an electric control system to drive the pressing wheel to press down and move forward after the tungsten rods move forward to a tungsten rod detection turning plate, transmitting a signal to the electric control system by the detection turning plate proximity switch, starting an IGBT superaudio power supply in a delayed mode, outputting power of the IGBT superaudio power supply to an induction coil in a hydrogen annealing box, and carrying out high-temperature heating annealing on the tungsten rods by the induction coil protected by hydrogen in the annealing box;
and step three, the tungsten rods after the annealing on the left side and the right side are transmitted to a discharging pinch roller through a cooling water jacket by a feeding pinch roller, after the tail parts of the tungsten rods completely pass through the discharging pinch roller, a cylinder magnetic switch above the discharging pinch roller detects a tungsten rod tail part signal, the signal is transmitted to a PLC control system in an electric control cabinet, a discharging leading-out cylinder is controlled, the discharging leading-out cylinder drives a discharging guide groove, a discharging leading-out guide rail and a discharging leading-out sliding block to drive the tungsten rods to continuously advance for 100-200 mm, and then a discharging overturning stepping motor is controlled to overturn the annealed tungsten rods onto a tungsten rod collecting rack, so that the tungsten rod annealing is completed.
5. The process for simultaneously annealing two tungsten rods according to claim 4, wherein in the second step, the annealing temperatures of the two tungsten rods in the induction coil are controlled to be set temperatures between 1800 ℃ and 2500 ℃ by adjusting the output power of the IGBT superaudio power supply.
6. The process for simultaneously annealing two tungsten rods according to claim 4, wherein in the second step, the speed of the feeding motor is controlled, and the annealing speed of the tungsten rods is controlled to be 0.3-0.6 m/min.
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