CN117628879A - Integrated ultra-fast high-temperature sintering furnace - Google Patents
Integrated ultra-fast high-temperature sintering furnace Download PDFInfo
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- CN117628879A CN117628879A CN202311674233.5A CN202311674233A CN117628879A CN 117628879 A CN117628879 A CN 117628879A CN 202311674233 A CN202311674233 A CN 202311674233A CN 117628879 A CN117628879 A CN 117628879A
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- heating
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- 238000005245 sintering Methods 0.000 title claims abstract description 154
- 238000010438 heat treatment Methods 0.000 claims abstract description 105
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 45
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 45
- 239000010439 graphite Substances 0.000 claims abstract description 45
- 230000001681 protective effect Effects 0.000 claims description 27
- 238000002955 isolation Methods 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 6
- 238000004321 preservation Methods 0.000 claims 3
- 239000000463 material Substances 0.000 abstract description 16
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 5
- 239000001301 oxygen Substances 0.000 abstract description 5
- 229910052760 oxygen Inorganic materials 0.000 abstract description 5
- 230000003993 interaction Effects 0.000 abstract description 3
- 230000000630 rising effect Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 30
- 238000000034 method Methods 0.000 description 13
- 230000008569 process Effects 0.000 description 13
- 238000009413 insulation Methods 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 238000009529 body temperature measurement Methods 0.000 description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 5
- 238000003825 pressing Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 4
- 229910052786 argon Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000004482 other powder Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
- F27B5/04—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated adapted for treating the charge in vacuum or special atmosphere
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
- F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
- F27B5/18—Arrangement of controlling, monitoring, alarm or like devices
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Furnace Details (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
The invention provides an integrated ultrafast high-temperature sintering furnace, which integrates a power supply, a graphite electrode, a heating body, a temperature control system, a vacuum system and a human-computer interaction interface, adopts a joule heating mode, effectively improves the heating efficiency and the heating speed of the sintering furnace, can reach extremely high heating temperature in a short time, reduces the volume of equipment, reduces the operation complexity and improves the stability of the equipment; the vacuum system realizes the vacuum and atmosphere control and adjustment of the inner container of the sintering cavity, and provides a needed atmosphere environment for sintering materials; through atmosphere protection structure, will be in advance vacuumized the back trace oxygen get rid of around the heat-generating body in the heating process of rising temperature to ensure to obtain 2000 ℃ to 3000 ℃ high temperature, the ultrafast high temperature sintering stove that has atmosphere protection heat-generating body, can adopt the structure operation of quick open door, and adopt conventional rubber ring through manual pressurization sealed can, have and open and get the fast characteristics of placing sample, only need the mechanical pump vacuum simultaneously, have easy operation, characteristics with low costs.
Description
Technical Field
The invention relates to the technical field of design and manufacture of high-temperature sintering devices, in particular to an integrated ultrafast high-temperature sintering furnace.
Background
Sintering refers to the transformation of a powdery material into a dense body. Powder sintering refers to a process in which a metal powder or other powder compact is heated to a temperature below the melting point of the main component, and a material or product having desired strength and characteristics is obtained due to physical and chemical actions such as bonding between particles. The sintering process is mainly used for producing ceramics, ultra-high temperature materials, refractory materials, powder metallurgy and the like. In general, after the powder is molded, a compact obtained by sintering is a polycrystalline material whose microstructure is composed of crystals, glass bodies and pores. The sintering process directly affects the grain size, pore size, and grain boundary shape and distribution in the microstructure, thereby affecting the properties of the material.
The bottom of the traditional sintering equipment box body is provided with a high-temperature heating bin, a wind wheel and other structures, a circulating air duct structure is designed by utilizing the heat energy and natural air flow principle, air in the box is sucked into the heating bin by an air conveying motor, flows back into a working chamber through an air duct and then enters the heating bin, and the heating effect is realized repeatedly; or arrange the heating pipe around the heating storehouse, through the heating of heating pipe, the flow of cooperation air is heated up the heating storehouse, and the not enough of current firing equipment existence includes: firstly, no matter what heating mode is, the heating is performed through indirect heating of air or other mediums, and the heating efficiency is low, the heating speed is low, the limit heating temperature is low, and the requirements of material processing cannot be met; secondly, the existing high-temperature sintering device is of a split structure, and has the defects of large occupied area, complex operation and poor stability; thirdly, the heating structure of the sintering equipment has severe requirements on the oxygen content in the environment in the use process, especially at the high temperature of more than 2000 ℃, trace oxygen can cause rapid loss and even failure of the heating element, therefore, a flange-sealed door opening structure is usually adopted, and a molecular pump or a diffusion pump is matched for use, so that the heating element can be used at the high temperature of 2000-3000 ℃ only if the extremely high vacuum degree is maintained, and the heating element has complex equipment, complex operation process and long period.
Disclosure of Invention
In view of the above, the present invention aims to provide an integrated ultra-fast high temperature sintering furnace, so as to solve some or all of the problems in the background art.
Based on the above purpose, the invention provides an integrated ultrafast high-temperature sintering furnace, which comprises an integrated chamber, a heating device, an air inlet and outlet system, a power supply and a controller;
the integrated chamber comprises a power end and a vacuum end, wherein the vacuum end comprises a vacuum cavity and an electric cavity, and the power end, the vacuum cavity and the electric cavity in the integrated chamber are connected through a frame; preferably, the integrated chamber is of an integral frame structure, a shell is arranged outside the integrated chamber to form three different chamber spaces, the functions of the integrated chamber are respectively provided, a power supply end is used for accommodating power supply equipment, a vacuum chamber is used for accommodating a main part of a heating device, an electric chamber is used for accommodating other circuit equipment and gas pipelines, the three chamber spaces are internally connected with a circuit and a gas circuit according to the requirement of a sintering furnace, the three chambers can be formed into different connection modes according to the requirement, or penetration or no obvious demarcation exists between all areas according to the design requirement.
The heating device comprises a sintering cavity liner, a graphite electrode, a heating body and a sintering furnace door, wherein the sintering cavity liner is fixed in the vacuum cavity, the graphite electrode is fixed in the sintering cavity liner, the heating body is connected to the graphite electrode, the sintering furnace door is movably connected to the vacuum cavity, and the sintering cavity liner is sealed; the sintering furnace door can adopt a quick-opening door type structure, and a conventional rubber ring is arranged on the inner side of the sintering furnace door in cooperation with the inner container of the sintering cavity and is sealed by manual pressure; the heating body can be long-strip-shaped, adopts a Joule heating mode, is a key material for realizing ultra-fast high-temperature sintering, generally adopts carbonaceous materials or metal tungsten and the like, directly contacts with a sintered object for direct heating, has high heat efficiency, can reach high temperature of more than 3000 ℃ within a few seconds, and does not need any heating medium due to the change of a heating principle, so that the sintering furnace does not need any air circulation system; the graphite electrode comprises a graphite electrode seat and an electrode pressing sheet, the graphite electrode seat is fixed on the sintering cavity liner, the heating body is fixed on the graphite electrode seat through the electrode pressing sheet, the bolt used for fixing is a boron nitride bolt, a binding post is arranged outside the sintering cavity liner, the graphite electrode is connected with the binding post, and the binding post is used for being connected with an external circuit; the open end of the sintering cavity liner is fixed on the frame of the vacuum cavity, and a sintering cavity liner bracket is also arranged, and is fixed on the frame of the vacuum cavity and used for supporting the weight of the rear part of the sintering cavity liner.
The air inlet and exhaust system comprises a protective air inlet pipe and an exhaust pipe, one end of the protective air inlet pipe is connected with external air inlet, the other end of the protective air inlet pipe is connected with an opening on the inner container of the sintering cavity, one end of the exhaust pipe is connected with external exhaust, and the other end of the exhaust pipe is connected with the opening on the inner container of the sintering cavity; the sintering chamber liner is provided with two openings for being respectively connected with a protective gas inlet pipe and an exhaust pipe, wherein the protective gas inlet pipe is inert gas with chemical properties such as nitrogen or argon when in use, the protective gas inlet pipe is connected with an external gas source through a gas valve, and the exhaust pipe can be connected with vacuum equipment with a suction function through the gas valve and is used for exhausting air in the sintering chamber liner.
The power supply is arranged in the power supply end, and the graphite electrode is electrically connected with the power supply; the graphite electrode is connected with the power supply through a copper bar preferably, and the power supply is an embedded IGBT power supply preferably.
The controller is arranged in the integrated cavity and is electrically connected with the heating device and the power supply; preferably, the controller is arranged in the electric cavity, and the controller is used for controlling the operation of the sintering furnace, including but not limited to controlling the opening and closing of a power supply, the voltage level, the power supply time length and the like, and can be connected with other electric equipment in the sintering furnace and used for controlling the electric equipment.
In an optimized scheme, the device further comprises an atmosphere protection tube, wherein the atmosphere protection tube is arranged in the sintering cavity liner, one end of the atmosphere protection tube is connected with the protection gas inlet tube through an opening in the sintering cavity liner, and the other end of the atmosphere protection tube is close to the heating body. The atmosphere protection pipe blows inert gases with chemical properties such as nitrogen or argon to the heating element, and forms atmosphere protection around the heating element, and the residual trace oxygen after the preliminary vacuumizing is removed from the periphery of the heating element in the heating process, so that the heating element is prevented from being rapidly failed when the high temperature of 2000-3000 ℃ is ensured to be obtained.
In an optimized scheme, the air outlet direction of the atmosphere protection tube is in the same horizontal plane with the heating body and is vertical to the heating body. Preferably, the atmosphere protection tube is arranged behind the heating element, a setting space is reserved for other equipment, and meanwhile, effective atmosphere protection is ensured to be formed around the heating element to the greatest extent.
In an optimized scheme, the air inlet and exhaust system further comprises an electromagnetic valve, the electromagnetic valve is arranged in the electric cavity and is respectively arranged on the protective air inlet pipe and the exhaust pipe, and the electromagnetic valve is electrically connected with the controller and controls the opening and closing of the protective air inlet pipe and the exhaust pipe. Preferably, the two electromagnetic valves are respectively arranged on the protective gas inlet pipe and the exhaust pipe, and the controller is used for controlling the opening and closing of the electromagnetic valves to realize orderly automatic gas inlet and exhaust and realize automatic programmed control of the sintering furnace.
In an optimized scheme, the air inlet and outlet system further comprises a pressure gauge, wherein the pressure gauge is fixed on the electric cavity shell and is connected to a branch pipe of the protective gas inlet pipe. The pressure gauge is used for measuring the pressure of air inlet, the pressure of the air inlet is not more than 3kg, and effective atmosphere protection is ensured to be formed near the heating element.
In an optimized scheme, the device further comprises a temperature measuring system, the temperature measuring system comprises a temperature measuring lens and a sealed observation hole, the sealed observation hole is formed in the upper portion of the vacuum cavity and communicated with the inner container of the sintering cavity above the heating body, and the temperature measuring lens is arranged above the sealed observation hole and is electrically connected with the controller. The sealed observation hole is provided with a transparent window, the transparent window is opposite to the heating body, the temperature measuring lens can detect the heating body or a sinter on the heating body through the transparent window, the temperature measuring lens is connected with the controller, the temperature setting can be carried out on the sintering furnace, the controller can control other electrical equipment according to the detection data of the temperature measuring lens, and after the sintering furnace reaches the preset temperature, the sintering process is controlled according to a program.
In an optimized scheme, the heating device further comprises an isolation assembly, and the isolation assembly is arranged between the sintering cavity liner and the graphite electrode. Due to the high temperature during sintering in the sintering furnace, the isolation component can be used for isolating high Wen Xiangxia conduction and damaging other equipment.
In an optimized scheme, the isolation assembly comprises a thermal insulation felt and a tetrafluoro plate, wherein the thermal insulation felt is arranged above the tetrafluoro plate, the thermal insulation felt is in contact with the graphite electrode, and the tetrafluoro plate is in contact with the sintering cavity liner. The insulation blanket is used to insulate the temperature and the tetrafluoro plate is used for insulation.
In an optimized scheme, the number of the graphite electrodes is two, the graphite electrodes are arranged in a non-contact opposite mode, and two ends of the heating body are respectively fixed on the two graphite electrodes.
In an optimized scheme, the intelligent control system further comprises a control panel, wherein the control panel is arranged outside the power end and is electrically connected with the controller. The sintering process can be automatically completed by program setting through the control panel.
In an optimized scheme, the device further comprises a water pan, wherein the water pan is arranged below the sintering furnace door, after the sintering furnace is used for sintering materials, sintering residues are generated in the inner container of the sintering cavity, and when the device is cleaned, if the device is cleaned directly downwards, the device is likely to be damaged due to the fact that the device is possibly entering the controller, and therefore the water pan is required to be arranged, and the sintering residues are cleaned into the water pan, so that subsequent cleaning is facilitated.
In an optimized scheme, the intelligent cabinet temperature control system further comprises an indicator light strip, wherein the indicator light strip is arranged outside the integrated chamber and is electrically connected with the controller. The indicator light strip is used for rapidly reflecting the running state of the equipment, and preferably can be divided into three colors, namely red is in a stop state, yellow is in a fault state and green is in a running state.
In an optimized scheme, the sintering furnace further comprises supporting legs, wherein the supporting legs are arranged at the bottom of the integrated chamber and used for supporting the sintering furnace.
From the above, it can be seen that the integrated ultra-fast high temperature sintering furnace provided by the invention adopts a joule heating mode, optimizes the structure of the sintering furnace according to the heating characteristics, removes the air circulation and other structures, and meanwhile, has high heating efficiency, high heating speed and high heating temperature in a short time due to the applied joule heating structure; the invention adopts an integrated structure, integrates a power supply, a graphite electrode, a heating body, a temperature control, a vacuum system and a man-machine interaction interface, and has the characteristics of rapid sample taking and placing, heating body replacement, dynamic control and display; the embedded IGBT power supply has voltage stabilization and temperature flow modes, and provides required working current and voltage and regulation and control for a heating element and integral equipment; the electrode-heating body system easy to replace is positioned in the working cavity, is combined with the furnace shell through the insulating sealing assembly, and conveniently replaces heating bodies with different materials and resistance values by utilizing the clamping structure; the manual/automatic temperature control system can be switched, and quick response and accurate temperature measurement and control are realized through the high-precision temperature measurement and control electronic element; the vacuum system realizes the vacuum and atmosphere control and adjustment of the inner container of the sintering cavity, and provides a needed atmosphere environment for sintering materials; the man-machine interaction interface is a data input, display and output window for performing program control work according to the requirement of the ultra-fast high-temperature sintering furnace with an integrated structure, and can simply and stably realize ultra-fast sintering; through atmosphere protection structure, will be in advance vacuumized the back trace oxygen get rid of around the heat-generating body in the heating process of rising temperature to ensure to obtain 2000 ℃ to 3000 ℃ high temperature, the ultrafast high temperature sintering stove that has atmosphere protection heat-generating body, can adopt the structure operation of quick open door, and adopt conventional rubber ring through manual pressurization sealed can, have and open and get the fast characteristics of placing sample, only need the mechanical pump vacuum simultaneously, have easy operation, characteristics with low costs.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an integrated ultra-fast high temperature sintering furnace;
FIG. 2 is a schematic view of the internal structure of a partially opened vacuum chamber;
FIG. 3 is a schematic diagram of the internal structure of a partially opened vacuum chamber and a power supply terminal;
FIG. 4 is a schematic view of the internal structure of the electrical cavity;
FIG. 5 is a schematic view of a vertical plane structure of an integrated ultra-fast high temperature sintering furnace according to the present invention;
FIG. 6 is a schematic view of a horizontal plane structure of an integrated ultra-fast high temperature sintering furnace according to the present invention;
FIG. 7 is a penetration diagram of the internal structure of an integrated ultra-fast high temperature sintering furnace according to the present invention;
fig. 8 is an enlarged view of a partial structure of a graphite electrode.
In the accompanying drawings:
1. the device comprises a power supply end, 2, a vacuum cavity, 3, an electric cavity, 4, a heating device, 4-1, a sintering cavity liner, 4-2, a graphite electrode, 4-3, a heating element, 4-4, a sintering furnace door, 4-5, a heat insulation felt, 4-6, a tetrafluoro plate, 4-7, a sintering cavity liner bracket, 4-8, a binding post, 4-21, a graphite electrode seat, 4-22, an electrode pressing sheet, 5-1, a protective gas inlet pipe, 5-2, an exhaust pipe, 5-3, a vacuum inlet and outlet nozzle, 5-4, an electromagnetic valve, 5-5, a pressure gauge, 6, a power supply, 7, an atmosphere protection pipe, 8-1, a temperature measuring lens, 8-2, a sealing observation hole, 9, a control panel, 10, a water receiving disc, 11 and an indicator light belt.
Detailed Description
The present invention will be further described in detail below with reference to specific embodiments and with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present invention more apparent.
It should be noted that unless otherwise defined, technical or scientific terms used in the embodiments of the present invention should be given the ordinary meaning as understood by one of ordinary skill in the art to which the present disclosure pertains. The terms "first," "second," and the like, as used in this disclosure, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
Specific embodiments of the present application are described below with reference to fig. 1-8.
An integrated ultrafast high-temperature sintering furnace comprises an integrated chamber, a heating device 4, an air inlet and outlet system, a power supply 6 and a controller;
the integrated chamber comprises a power end 1 and a vacuum end, wherein the vacuum end comprises a vacuum cavity 2 and an electric cavity 3, and the power end 1, the vacuum cavity 2 and the electric cavity 3 in the integrated chamber are connected through frames;
specifically, the integral type cavity is whole frame construction, and the outside is equipped with the shell, forms three different cavity spaces, and wherein the power end is used for holding power equipment, and the vacuum chamber is used for holding heating device's main part, and the electric chamber is used for holding other circuit equipment and gas pipeline.
The heating device 4 comprises a sintering cavity liner 4-1, a graphite electrode 4-2, a heating body 4-3 and a sintering furnace door 4-4, wherein the sintering cavity liner 4-1 is fixed in the vacuum cavity 2, the graphite electrode 4-2 is fixed in the sintering cavity liner 4-1, the heating body 4-3 is connected to the graphite electrode 4-2, the sintering furnace door 4-4 is movably connected to the vacuum cavity 2, and the sintering cavity liner 4-1 is sealed;
specifically, the sintering furnace door 4-4 adopts a quick-opening door structure, and a conventional rubber ring is arranged on the inner side of the sintering furnace door 4-4 in cooperation with the sintering cavity liner 4-1 and is sealed by manual pressure;
specifically, the heating element 4-3 can be long and adopts a joule heating mode;
specifically, the graphite electrode 4-2 comprises a graphite electrode seat 4-21 and an electrode pressing sheet 4-22, the graphite electrode seat 4-21 is fixed on the sintering cavity liner 4-1, and the heating element 4-3 is fixed on the graphite electrode seat 4-21 through the electrode pressing sheet 4-22;
specifically, a binding post 4-8 is arranged outside the sintering cavity liner 4-1, the graphite electrode 4-2 is connected with the binding post 4-8, and the binding post 4-8 is used for being connected with an external circuit; the open end of the sintering cavity liner 4-1 is fixed on the frame of the vacuum cavity 2;
specifically, a sintering cavity liner support 4-7 is further arranged, and the sintering cavity liner support 4-7 is fixed on the frame of the vacuum cavity 2 and is used for supporting the rear weight of the sintering cavity liner 4-1.
The air inlet and exhaust system comprises a protective air inlet pipe 5-1 and an exhaust pipe 5-2, wherein one end of the protective air inlet pipe 5-1 is connected with external air inlet, the other end of the protective air inlet pipe is connected with an opening on the sintering cavity liner 4-1, one end of the exhaust pipe 5-2 is connected with external exhaust, and the other end of the exhaust pipe is connected with an opening on the sintering cavity liner 4-1;
specifically, the sintering chamber liner 4-1 has two openings for respectively connecting the shielding gas inlet pipe 5-1 and the exhaust pipe 5-2, the shielding gas inlet pipe 5-1 is gas with inert chemical properties such as nitrogen or argon when in use, the shielding gas inlet pipe 5-1 is connected with an external gas source through a gas valve, and the exhaust pipe 5-2 can be connected with a vacuum device with a suction function through the gas valve for exhausting air in the sintering chamber liner 4-1.
The power supply 6 is arranged in the power supply end 1, and the graphite electrode 4-2 is electrically connected with the power supply 6;
specifically, the graphite electrode 4-2 is electrically connected with the power supply 6 in a copper bar manner;
further, the power supply is an embedded IGBT power supply.
The controller is arranged in the integrated cavity and is electrically connected with the heating device 4 and the power supply 6;
specifically, the controller is disposed in the electrical cavity 3, and the controller is used for controlling the operation of the sintering furnace, including but not limited to controlling the opening and closing of the power supply, the voltage level, the power supply duration, etc., and may also be connected to and control other electrical devices in the sintering furnace.
Referring to fig. 6, in some embodiments, the device further comprises an atmosphere protection tube 7, wherein the atmosphere protection tube 7 is arranged in the sintering chamber liner 4-1, one end of the atmosphere protection tube 7 is connected with the shielding gas inlet tube 5-1 through an opening on the sintering chamber liner 4-1, and the other end of the atmosphere protection tube is close to the heating body 4-3.
Specifically, the air outlet direction of the atmosphere protection tube 7 is in the same horizontal plane with the heating element 4-3 and is vertical to the heating element 4-3.
Further, the atmosphere protection tube 7 is arranged behind the heating element 4-3, reserves a setting space for other equipment, and simultaneously ensures that effective atmosphere protection is formed around the heating element 4-3 to the greatest extent.
Referring to fig. 4, in some embodiments, the air intake and exhaust system further includes an electromagnetic valve 5-4, where the electromagnetic valve 5-4 is disposed in the electric cavity 3 and is disposed on the shielding air intake pipe 5-1 and the exhaust pipe 5-2, respectively, and the electromagnetic valve 5-4 is electrically connected to the controller to control opening and closing of the shielding air intake pipe 5-1 and the exhaust pipe 5-2.
Specifically, the two electromagnetic valves 5-4 are respectively arranged on the protective gas inlet pipe 5-1 and the exhaust pipe 5-2, and the controller is used for controlling the opening and closing of the electromagnetic valves 5-4 to realize orderly automatic gas inlet and exhaust and realize automatic programmed control of the sintering furnace.
Referring to fig. 4, in some embodiments, the air intake and exhaust system further includes a pressure gauge 5-5, where the pressure gauge 5-5 is fixed on the housing of the electric chamber 3, and the pressure gauge 5-5 is connected to a branch pipe of the shielding gas intake pipe 5-1.
Specifically, the pressure gauge 5-5 is used for measuring the pressure of the air intake, and the air intake pressure is not more than 3kg, so that effective atmosphere protection is ensured to be formed near the heating element 4-3.
Referring to fig. 1-3, in some embodiments, the device further comprises a temperature measurement system, the temperature measurement system comprises a temperature measurement lens 8-1 and a sealed observation hole 8-2, the sealed observation hole 8-2 is arranged at the upper part of the vacuum cavity 2 and is communicated with the sintering cavity liner 4-1 above the heating body 4-3, the temperature measurement lens 8-1 is arranged above the sealed observation hole 8-2, and the temperature measurement lens 8-1 is electrically connected with the controller.
Specifically, a transparent window is arranged on the sealed observation hole 8-2, the transparent window is opposite to the heating body 4-3, the temperature measuring lens 8-1 can detect the heating body 4-3 or a sinter on the heating body through the transparent window, the temperature measuring lens 8-1 is connected with a controller, the temperature of the sintering furnace can be set, the controller can control other electrical equipment according to detection data of the temperature measuring lens 8-1, and after the sintering furnace reaches a preset temperature, the sintering process is controlled according to a program.
Referring to fig. 8, in some embodiments, the heating device 4 further comprises an isolation assembly disposed between the sintering chamber liner 4-1 and the graphite electrode 4-2. Due to the high temperature during sintering in the sintering furnace, the isolation component can be used for isolating high Wen Xiangxia conduction and damaging other equipment.
Specifically, the isolation assembly comprises a thermal insulation felt 4-5 and a tetrafluoro plate 4-6, wherein the thermal insulation felt 4-5 is arranged above the tetrafluoro plate 4-6, the thermal insulation felt 4-5 is contacted with the graphite electrode 4-2, and the tetrafluoro plate 4-6 is contacted with the sintering cavity liner 4-1. The insulation felt 4-5 is used for insulating temperature, and the tetrafluoro plate 4-6 is used for insulation.
Specifically, the number of the graphite electrodes 4-2 is two, the two graphite electrodes are arranged in a non-contact and opposite mode, and two ends of the heating body 4-3 are respectively fixed on the two graphite electrodes 4-2.
Specifically, the device further comprises a control panel 9, wherein the control panel 9 is arranged outside the power end 1 and is electrically connected with the controller. The sintering process can be automatically completed by program setting through the control panel.
Referring to fig. 3, in some embodiments, the device further includes a water pan 10, where the water pan 10 is disposed below the sintering furnace door 4-4, after the sintering furnace sinters the material, sintering residues may be generated in the sintering chamber liner 4-1, and during cleaning, if cleaning is performed directly downward, the sintering residues may enter the controller to cause damage to the device, so that the water pan 10 is disposed, and cleaning the sintering residues into the water pan 10 is convenient for subsequent cleaning.
Referring to fig. 1, in some embodiments, the apparatus further includes an indicator light strip 11, the indicator light strip 11 being disposed outside the integrated chamber, the indicator light strip 11 being electrically connected to the controller.
Specifically, the indicator light strip is used for rapidly responding to the running state of the equipment, and can be divided into three colors, wherein red is in a stop state, yellow is in a fault state, and green is in a running state.
Referring to fig. 5, in some embodiments, the sintering furnace further includes a leg provided at the bottom of the integrated chamber for supporting the sintering furnace.
The specific structure and sintering operation process are as follows:
selecting a proper heating element 4-3 to be fixed on a graphite electrode 4-2, placing pressed materials to be sintered on the heating element 4-3, closing a sintering furnace door 4-4, confirming that sealing is perfect, opening an electromagnetic valve 5-4 on an exhaust pipe 5-2 through a control panel 9, vacuumizing the sintering cavity liner 4-1, closing the electromagnetic valve 5-4 on the exhaust pipe 5-2 after the vacuumizing operation is finished, opening the electromagnetic valve 5-4 on a protective gas inlet pipe 5-1, flushing protective gas into the sintering cavity liner 4-1, continuously releasing the protective gas in the sintering process, setting sintering parameters on the control panel 9 according to the sintering requirements of the materials to be sintered, starting the sintering furnace, entering an automatic sintering program, automatically controlling equipment to finish the sintering process according to the temperature parameters acquired through a temperature measuring lens 8-1, the set sintering time and other parameters, opening the sintering furnace door 4-4 after the sintering process is finished, taking out the materials to be sintered, at the moment, continuously releasing the protective gas by an atmosphere protective pipe 7, manufacturing the protective gas around the heating element 4-3, preventing the damage of the heating element 4-3, and then rapidly placing the materials into a subsequent sintering operation batch to be rapidly carried out.
Those of ordinary skill in the art will appreciate that: the discussion of any of the embodiments above is merely exemplary and is not intended to suggest that the scope of the disclosure, including the claims, is limited to these examples; the technical features of the above embodiments or in the different embodiments may also be combined within the idea of the invention, the steps may be implemented in any order and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.
The embodiments of the invention are intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Therefore, any omission, modification, equivalent replacement, improvement, etc. of the present invention should be included in the scope of the present invention.
Claims (10)
1. An integrated ultrafast high-temperature sintering furnace is characterized by comprising an integrated chamber, a heating device (4), an air inlet and exhaust system, a power supply (6) and a controller;
the integrated cavity comprises a power end (1) and a vacuum end, wherein the vacuum end comprises a vacuum cavity (2) and an electric cavity (3), and the power end (1), the vacuum cavity (2) and the electric cavity (3) in the integrated cavity are connected through a frame;
the heating device (4), the heating device (4) comprises a sintering cavity liner (4-1), a graphite electrode (4-2), a heating body (4-3) and a sintering furnace door (4-4), the sintering cavity liner (4-1) is fixed in the vacuum cavity (2), the graphite electrode (4-2) is fixed in the sintering cavity liner (4-1), the heating body (4-3) is connected to the graphite electrode (4-2), the sintering furnace door (4-4) is movably connected to the vacuum cavity (2), and the sintering cavity liner (4-1) is sealed;
the air inlet and exhaust system comprises a protective air inlet pipe (5-1) and an exhaust pipe (5-2), wherein one end of the protective air inlet pipe (5-1) is connected with external air inlet, the other end of the protective air inlet pipe is connected with an opening on the sintering cavity liner (4-1), one end of the exhaust pipe (5-2) is connected with external exhaust, and the other end of the exhaust pipe is connected with an opening on the sintering cavity liner (4-1);
the power supply (6) is arranged in the power supply end (1), and the graphite electrode (4-2) is electrically connected with the power supply (6);
and the controller is arranged in the integrated cavity and is electrically connected with the heating device (4) and the power supply (6).
2. The integrated ultra-fast high-temperature sintering furnace according to claim 1, further comprising an atmosphere protection tube (7), wherein the atmosphere protection tube (7) is arranged in the sintering chamber inner container (4-1), one end of the atmosphere protection tube (7) is connected with the shielding gas inlet tube (5-1) through an opening on the sintering chamber inner container (4-1), and the other end of the atmosphere protection tube is close to the heating body (4-3).
3. An integrated ultrafast high temperature sintering furnace according to claim 2, wherein the gas outlet direction of the atmosphere protection tube (7) is in the same horizontal plane with the heating element (4-3) and is vertical to the heating element (4-3).
4. The integrated ultra-fast high-temperature sintering furnace according to claim 1, wherein the air inlet and exhaust system further comprises an electromagnetic valve (5-4), the electromagnetic valve (5-4) is arranged in the electric cavity (3) and is respectively arranged on the protective air inlet pipe (5-1) and the exhaust pipe (5-2), the electromagnetic valve (5-4) is electrically connected with the controller, and the opening and closing of the protective air inlet pipe (5-1) and the exhaust pipe (5-2) are controlled.
5. The integrated ultra-fast high-temperature sintering furnace according to claim 1, wherein the air inlet and exhaust system further comprises a pressure gauge (5-5), the pressure gauge (5-5) is fixed on the outer shell of the electric cavity (3), and the pressure gauge (5-5) is connected to a branch pipe of the protective air inlet pipe (5-1).
6. The integrated ultra-fast high-temperature sintering furnace according to claim 1, further comprising a temperature measuring system, wherein the temperature measuring system comprises a temperature measuring lens (8-1) and a sealing observation hole (8-2), the sealing observation hole (8-2) is arranged on the upper portion of the vacuum cavity (2) and communicated with the sintering cavity liner (4-1) above the heating element (4-3), the temperature measuring lens (8-1) is arranged above the sealing observation hole (8-2), and the temperature measuring lens (8-1) is electrically connected with the controller.
7. An integrated ultra-fast high temperature sintering furnace according to claim 1, wherein the heating device (4) further comprises an isolation assembly arranged between the sintering chamber inner container (4-1) and the graphite electrode (4-2).
8. The integrated ultrafast high temperature sintering furnace as recited in claim 7, wherein the isolation assembly comprises a heat preservation felt (4-5) and a tetrafluoro plate (4-6), the heat preservation felt (4-5) is arranged above the tetrafluoro plate (4-6), the heat preservation felt (4-5) is in contact with the graphite electrode (4-2), and the tetrafluoro plate (4-6) is in contact with the sintering chamber liner (4-1).
9. The integrated ultra-fast high-temperature sintering furnace according to claim 1, wherein the number of the graphite electrodes (4-2) is two, the graphite electrodes are arranged in a non-contact opposite mode, and two ends of the heating body (4-3) are respectively fixed on the two graphite electrodes (4-2).
10. The integrated ultra-fast high temperature sintering furnace according to claim 1, further comprising a control panel (9), wherein the control panel (9) is arranged outside the power supply end (1) and is electrically connected with the controller.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311674233.5A CN117628879A (en) | 2023-12-07 | 2023-12-07 | Integrated ultra-fast high-temperature sintering furnace |
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| CN202311674233.5A CN117628879A (en) | 2023-12-07 | 2023-12-07 | Integrated ultra-fast high-temperature sintering furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118654480A (en) * | 2024-08-20 | 2024-09-17 | 爱发科真空技术（沈阳）有限公司 | Energy-saving vacuum sintering furnace with flat heating chamber |
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2023
- 2023-12-07 CN CN202311674233.5A patent/CN117628879A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118654480A (en) * | 2024-08-20 | 2024-09-17 | 爱发科真空技术（沈阳）有限公司 | Energy-saving vacuum sintering furnace with flat heating chamber |
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