CN116878278A

CN116878278A - Tubular vacuum furnace device for 3d printing and control system

Info

Publication number: CN116878278A
Application number: CN202310830633.4A
Authority: CN
Inventors: 唐飞
Original assignee: Nanjing Chenglian Laser Technology Co Ltd
Current assignee: Nanjing Chenglian Laser Technology Co Ltd
Priority date: 2023-07-07
Filing date: 2023-07-07
Publication date: 2023-10-13

Abstract

The application discloses a tubular vacuum furnace device for 3d printing and a control system, which comprise a box body and a vacuum container, wherein the vacuum container is formed by welding alloy flange water-cooled pipe bodies, a hearth is arranged in the vacuum container, and the hearth is formed by splicing polycrystalline alumina fibers; silicon carbide rods are arranged on the outer side of the hearth and uniformly fixed on the periphery of the hearth for annular heating; one end of the vacuum container is provided with a furnace door, the inner side of the furnace door is provided with a heat preservation furnace plug, the heat preservation furnace plug consists of a plurality of heat insulation plugs, and a vacuum circular pipe extending out of the outer side of the furnace door is provided with a vacuum air release valve; the furnace body is provided with a furnace frame which is connected with the box body through bolts, and the box body is provided with an automatic control display screen. The control system is arranged on the 3d printing tubular vacuum furnace device, and has the characteristics of safety, reliability, simplicity in operation, high temperature control precision, good heat preservation effect, large temperature range and high furnace temperature uniformity, so that the operation control is more accurate, the process is more accurate, and the labor is saved.

Description

Tubular vacuum furnace device for 3d printing and control system

Technical Field

The application relates to the technical field of vacuum furnaces, in particular to a tubular vacuum furnace device for 3d printing and a control system.

Background

The vacuum furnace utilizes a vacuum system (which is formed by carefully assembling elements such as a vacuum pump, a vacuum measuring device, a vacuum valve and the like) in a specific space of the furnace chamber to discharge substances in the furnace chamber, so that the pressure in the furnace chamber is smaller than a standard atmospheric pressure, and the space in the furnace chamber is in a vacuum state, namely the vacuum furnace. Typically, the high vacuum pump system is coupled with tubing in a furnace sealed with a metal or quartz glass enclosure. The existing vacuum furnace device adopts quartz tubes, but the quartz tubes have a plurality of defects, the quartz tubes have short service life, are easy to damage, inconvenient to detach, complex to operate, poor in sealing effect, high in maintenance cost and single in purpose, and do not have a full-automatic program control system, so that a plurality of persons are required to finish cooperatively, manpower resources are wasted, the cooling speed is low, and the labor efficiency is low.

Therefore, there is a need to provide a tube vacuum furnace apparatus and control system for 3d printing to solve the problems of the prior art.

Disclosure of Invention

This section is intended to summarize some aspects of embodiments of the application and to briefly introduce some preferred embodiments, which may be simplified or omitted in this section, as well as the description abstract and the title of the application, to avoid obscuring the objects of this section, description abstract and the title of the application, which is not intended to limit the scope of this application.

The present application has been made in view of the above-mentioned and/or problems occurring in the prior art when tube vacuum furnace apparatuses are used.

Therefore, the technical problems to be solved by the application are that the tubular vacuum furnace device has short service life, easy damage, inconvenient disassembly, complex operation, poor sealing effect, high maintenance cost and no full-automatic program control system, and is often finished by a plurality of persons in cooperation, thereby wasting human resources, having low cooling speed and low labor efficiency when cooling.

In order to solve the technical problems, the application provides the following technical scheme: the tubular vacuum furnace device for 3d printing comprises a box body, wherein a vacuum container is arranged in the box body, the vacuum container is formed by welding alloy flange water-cooled tube bodies, a hearth is arranged in the vacuum container, and the hearth is formed by splicing polycrystalline alumina fibers; the outside of the hearth is provided with silicon carbide rods which are uniformly fixed on the periphery of the hearth for annular heating; one end of the vacuum container is provided with a furnace door, the inner side of the furnace door is provided with a heat preservation furnace plug, the heat preservation furnace plug consists of a plurality of heat insulation plugs, and a vacuum circular pipe extending out of the outer side of the furnace door is provided with a vacuum air release valve; the vacuum container is provided with a furnace frame, the furnace frame is connected with the box body through bolts, and the box body is provided with an automatic control display screen.

As a preferable scheme of the tubular vacuum furnace device for 3d printing, the application is as follows: the vacuum liner is provided with a vacuum air inlet pipeline, and the vacuum air inlet pipeline is connected with a vacuum pump through a corrugated pipe.

As a preferable scheme of the tubular vacuum furnace device for 3d printing, the application is as follows: the vacuum liner is externally provided with a double-air-cooling furnace shell, the double-air-cooling furnace shell is connected with a cold air assembly, and the double-air-cooling furnace shell is arranged on the furnace frame.

As a preferable scheme of the tubular vacuum furnace device for 3d printing, the application is as follows: the furnace door is provided with a flange locking unit, and a sealing ring is arranged in the flange locking unit.

The application has the beneficial effects that: the vacuum furnace device formed by adopting the heating mode of the alloy flange water-cooled pipe body, the polycrystalline alumina fiber hearth and the silicon carbide rod and directional ventilation treatment has the characteristics of safety, reliability, simplicity in operation, high temperature control precision, good heat preservation effect, large temperature range, high uniformity of hearth temperature and the like, can be optionally matched with atmosphere and is used for pumping different vacuum furnace types, and has attractive and elegant appearance, convenience in overhaul, low maintenance cost, longer service life, difficulty in damage, convenience, stability and reliability in disassembly and convenience in use, and the equipment is provided with a rapid cooling device, so that the production efficiency can be greatly improved.

In view of the problem that the use efficiency of the tube vacuum furnace device can be further improved, a control system is provided.

In order to solve the technical problems, the application also provides the following technical scheme: the tubular vacuum furnace device for 3d printing comprises any one of the embodiments, and further comprises a temperature control assembly, a vacuum assembly and an interlocking assembly, wherein the vacuum assembly comprises a vacuum electromagnetic valve, a vacuum pressure gauge, a vacuum pump, a vacuum air release valve, a flange locking unit and a vacuum air release valve; the temperature control assembly comprises a temperature sensor, a controller, a silicon carbide rod, a temperature control instrument and a cold air assembly.

As a preferred embodiment of the control system according to the present application, the control system is characterized in that: the interlocking assembly comprises a fault module, an alarm module, a start-stop module and a controller, wherein the fault module is electrically connected with the start-stop module and the controller, and the alarm module is electrically connected with the controller and the display screen.

As a preferred embodiment of the control system according to the present application, the control system is characterized in that: the temperature control assembly, the vacuum assembly and the interlocking assembly are electrically connected with the display screen through signal wires, the display screen further comprises an electric heat sensor, an air switch module, a time relay, a resistance module, a power switch, a signal receiving and transmitting module, a sensor communication module, a storage module, a data monitoring module and a resistance vacuum gauge, and the electric heat sensor, the data monitoring module and the storage module are electrically connected with the air switch module and the resistance module; the time relay, the sensor communication module and the signal receiving and transmitting module are electrically connected, and the storage module, the resistance vacuum gauge, the controller and the power switch are electrically connected.

The application has the other beneficial effects that: the integrated display screen and the full-automatic program control are adopted, one-key starting is realized, manual intervention is not needed in the full-range process, the material is taken from the point, the operation is foolless, and no requirement is imposed on operators. The interlocking device is additionally arranged in the control system, so that if a certain part has a problem or operation problem, the data cannot reach the set data, the system cannot go down, and the sintering process failure caused by the unattended operation is avoided; thus, the repeated stability of each sintering process can be effectively ensured. In addition, the tubular vacuum furnace device is provided with a resistance vacuum gauge and an interlocking system with the control system; if the vacuum degree in the operation is not reached, the equipment can not be heated, the workpiece is prevented from being oxidized, and the performance is more reliable.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Wherein:

FIG. 1 is an overall schematic diagram of a tube vacuum furnace apparatus and control system for 3d printing according to one embodiment of the present application;

FIG. 2 is a schematic view of a vacuum bladder of a tube vacuum furnace apparatus and a control system for 3d printing according to an embodiment of the present application;

FIG. 3 is a schematic view of a furnace door structure of a tube vacuum furnace apparatus and a control system for 3d printing according to an embodiment of the present application;

fig. 4 is a schematic diagram of a control system component of a tube vacuum furnace apparatus and a control system for 3d printing according to an embodiment of the present application.

Reference numerals: 101. a case; 102. a vacuum bladder; 103. a furnace; 104. a silicon carbide rod; 105. a furnace door; 107. a double air-cooled furnace shell; 108. a furnace frame; 109. a heat preservation furnace plug; 110. a heat insulation plug; 111. a vacuum bleed valve; 112. a vacuum air intake duct; 113. a vacuum pump; 600. a cold air assembly; 700. a flange locking unit; 300. a temperature control assembly; 400. a vacuum assembly; 500. an interlock assembly; 301. a controller; 302. a vacuum solenoid valve; 303. a vacuum pressure gauge; 305. a temperature control instrument; 304. a temperature sensor; 501. a fault module; 502. an alarm module; 503. a start-stop module; 200. a display screen; 201. an electric heat sensor; 202. an air switch module; 203. a time relay; 204. a resistor module; 205. a power switch; 206. a signal receiving and transmitting module; 207. a sensor communication module; 208. a storage module; 209. a data monitoring module; 210. a resistance vacuum gauge.

Detailed Description

In order that the above-recited objects, features and advantages of the present application will become more readily apparent, a more particular description of the application will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present application is not limited to the specific embodiments disclosed below.

In the following detailed description of the embodiments of the present application, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration only, and in which is shown by way of illustration only, and in which the scope of the application is not limited for ease of illustration. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.

Further still, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the application. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Example 1

Referring to fig. 1 to 3, a first embodiment of the present application provides a tube type vacuum furnace apparatus for 3d printing, which includes a box 101, wherein a vacuum liner 102 is disposed in the box 101, the vacuum liner 102 is formed by welding an alloy flange water-cooled tube, a furnace chamber 103 is disposed in the vacuum liner 102, and the furnace chamber 103 is formed by assembling polycrystalline alumina fibers; a silicon carbide rod 104 is arranged on the outer side of the hearth 103, and the silicon carbide rod 104 is uniformly fixed on the periphery of the hearth 103 for annular heating; one end of the vacuum container 102 is provided with a furnace door 105, the inner side of the furnace door 105 is provided with a heat preservation furnace plug 109, the heat preservation furnace plug 109 consists of a plurality of heat insulation plugs 110, and the outer side of the furnace door 105 is provided with a vacuum circular pipe extending out and provided with a vacuum air release valve 111; the vacuum container 102 is externally provided with a furnace frame 108, the furnace frame 108 is connected with the box body 101 through bolts, and the box body 101 is provided with an automatic control display screen 200. Specifically, a fully-sealed module type shell with brand new design is adopted, and the reasonable structural design can lead the furnace shell to carry out directional ventilation treatment on each sealing point (the furnace door 105 and the air passage interface), so that the double safety of use can be ensured; the novel appearance is more attractive, and the operation is more convenient, safe and reliable; the silicon carbide rod 104 in the tube type vacuum furnace device has heating power of 15KW (380V), can be heated to 1200 ℃, in addition, the air switch module 202 on the tube type vacuum furnace device adopts current of 63A, the hearth 103 is in a size of phi 200X360mm, a temperature sensor 304 is arranged in the vacuum furnace device and used for recording the temperature in the hearth 103 in real time, in addition, a resistance vacuum gauge 210 is arranged outside the vacuum furnace, the vacuum degree in the vacuum furnace is monitored in real time, the vacuum degree can be controlled to be less than or equal to 0.1PA through the vacuum liner 102 adopting an alloy flange water-cooled tube body, the control precision error reaches +/-0.1 ℃ through the control among modules aiming at a temperature control system in the vacuum furnace device, the process accuracy is improved, and the control temperature can be regulated in a plurality of modes according to different process requirements by adopting a mode of 30-section program temperature control PID regulation mode. The vacuum liner 102 is provided with a vacuum air inlet pipe 112, and the vacuum air inlet pipe 112 is connected with a vacuum pump 113 through a corrugated pipe. The bellows is used to ensure that the vacuum pressure in the vacuum chamber 102 is more accurate, and the tail gas generated by the vacuum chamber 102 is directly discharged outside. The vacuum liner 102 is provided with a double air-cooled furnace shell 107, and the double air-cooled furnace shell 107 is arranged on the furnace frame 108. In order to ensure the purity of the vacuum pressure in the vacuum container 102, the furnace door 105 is provided with a flange locking unit 700, and a sealing ring is arranged in the flange locking unit 700. In order to increase the cooling speed of the furnace 103, the double air-cooled furnace shell 107 is connected with the cold air assembly 600, and rapid cooling is performed in an air-cooled manner.

Wherein, the structural feature and the range of application of tubular vacuum furnace device include: (1) The fully-sealed module type shell with brand new design is adopted, and the reasonable structural design can lead the furnace shell to carry out directional ventilation treatment on each sealing point (the furnace door 105 and the air passage interface), so that the double safety of use can be ensured; the novel appearance is more attractive, and the operation is more convenient, safe and reliable; (2) The vacuum liner 102 adopts a high-temperature alloy flange water-cooled pipe body full-welded structure; the inner wall is subjected to fine polishing, so that the vacuum is easier to reach, and the vacuum environment is cleaner; compared with the vacuum heat treatment furnace in the market, the vacuum heat treatment furnace has the advantages of long service life of the vacuum liner 102, safety, reliability, long service life of the sealing ring and the like; (3) The furnace door 105 adopts a 304 stainless steel flange, the heat insulation plug 110 is made of high-temperature alloy by the heat insulation furnace plug 109, and the reasonable heat insulation layer structure design ensures the safe temperature of the furnace door 105; (4) A high-purity polycrystalline alumina fiber spliced hearth 103 is adopted; the surface is coated with an imported high-temperature alumina coating, so that the heating efficiency can be effectively improved, and the hearth 103 is not easy to crack; the silicon carbide rods 104 are uniformly fixed on the circumference of the hearth 103 by adopting the advanced foreign vacuum adsorption hearth 103 forming technology to heat radiation; the integrated vacuum adsorption molding hearth 103 has high density, good heat preservation and difficult fire bouncing; the constant temperature area and the temperature field uniformity of the hearth 103 can be effectively ensured; (5) The built-in vacuum system of the equipment adopts a direct-connected pump VRD-16 series, a vacuum electromagnetic valve 302, a vacuum pressure gauge 303, a vacuum air release valve 111, a vacuum pipeline and the like, and an air inflation interface is reserved. In order to reduce the vibration of the furnace body, the vacuum pipeline is connected with the vacuum pump 113 by adopting a metal corrugated pipe, and the vacuum measurement can be optionally carried out by arranging a resistance vacuum gauge 210; the vacuum system can reach the working vacuum degree of about 1PA only for 3-5 min;

the vacuum liner 102 of the device adopts a high-temperature alloy pipe, so that the device has longer service life, is not easy to damage and is convenient to detach compared with a quartz pipe structure in the market; the placement of the substrate is more trouble-saving; the device has large use space; the space length is 360mm, and 2 substrates with phi 150-180mm or 3-4 substrates with phi 100 can be placed; compared with a quartz structure, the treatment capacity is greatly improved, and the treatment cost is greatly reduced; the vacuum liner 102 adopts a welded flange, so that compared with the requirement of a quartz tube for mounting and dismounting the flange, the high-temperature alloy tube is more convenient, stable and reliable in use;

the vacuum furnace device is provided with an interlocking system consisting of a resistance vacuum gauge 210 and a control system; if the vacuum degree in operation cannot be reached, the equipment cannot be heated, so that the workpiece is prevented from being oxidized, and the performance is more reliable; compared with a quartz tube structure, whether the vacuum degree in the tube can be achieved or not, whether the air leakage exists or not can not be judged all the time, and only blind burning is realized; the work piece is often oxidized at random; the device is provided with a rapid cooling device, and can greatly improve the production efficiency.

In use, the air switch module 202 and the power switch 205 are turned on; the instrument lamp is on; loading the inner plug into the vacuum bladder 102, then into the furnace frame 108, placing the substrate onto the furnace frame 108 with crucible tongs or hand (wearing a thick glove), then into the insulating plug 110; (the material filled in the vacuum liner 102 needs to be kept clean and foreign matters cannot be attached); closing the furnace door 105 and compacting the lock catch of the furnace door 105; clicking the display screen 200 to automatically run; when the process is completed, the operation button automatically resets gray; the furnace door 105 is opened, and the outer insulating plug 110 is removed by crucible tongs or hand (wearing thick insulating gloves) and then the material is removed.

In summary, the above embodiments do not limit the specific materials and sizes of the vacuum furnace apparatus, and may be changed according to the usage situations of specific requirements.

Example 2

Referring to fig. 4, unlike the previous embodiment, the second embodiment of the present application provides a control system, which solves the problem that the intelligent control efficiency of the tube type vacuum furnace apparatus can be further improved, and includes the tube type vacuum furnace apparatus for 3d printing according to any of the above embodiments, and includes a temperature control assembly 300, a vacuum assembly 400, and an interlock assembly 500, wherein the vacuum assembly 400 includes a vacuum solenoid valve 302, a vacuum pressure gauge 303, a vacuum pump 113, a flange locking unit 700, and a vacuum purge valve 111; the temperature control assembly 300 comprises a temperature sensor 304, a controller 301, a silicon carbide rod 104, a temperature control instrument 305 and a cold air assembly 600. The interlocking component 500 comprises a fault module 501, an alarm module 502, a start-stop module 503 and a controller 301, wherein the fault module 501 is electrically connected with the start-stop module 503 and the controller 301, and the alarm module 502 is electrically connected with the controller 301 and the display screen 200. The temperature control assembly 300, the vacuum assembly 400 and the interlocking assembly 500 are electrically connected with the display screen 200 through signal wires, the display screen 200 also comprises an electric heat sensor 201, an air switch module 202, a time relay 203, a resistance module 204, a power switch 205, a signal receiving and transmitting module 206, a sensor communication module 207, a storage module 208, a data monitoring module 209 and a resistance vacuum gauge 210, wherein the electric heat sensor 201, the data monitoring module 209 and the storage module 208 are electrically connected with the air switch module 202 and the resistance module 204; the time relay 203, the sensor communication module 207 and the signal transceiver module 206 are electrically connected, and the storage module 208, the resistance vacuum gauge 210, the controller 301 and the power switch 205 are electrically connected. Specifically, when the vacuum furnace device fails, no matter the temperature control assembly 300 or any one of the vacuum assembly 400 or the interlocking assembly 500 fails, the failure module 501 will send a command to the controller 301, the controller 301 starts the alarm module 502 to send an alarm, at this time, the data interlocking assembly 500 will cause the data not to reach the set data, the system will not go down, the display screen 200 has a touchable function, and by setting the automatic program parameters on the display screen, the control system can control the operation of the whole vacuum furnace device and monitor all the data of the vacuum furnace device, for example: the protection system of the data interlocking assembly 500 is started when the data monitoring module 209 monitors that the set preset value is not reached or exceeded, the preset data system does not continue to operate, meanwhile, fault information is transmitted to a staff terminal through the signal transceiver module 206, the staff can accurately maintain or replace corresponding faults, time for troubleshooting fault reasons is saved, and working efficiency is improved. For example: the system automatically operates according to a set program: the vacuum pump 113 is started first, heating is started when the vacuum degree is smaller than a set value, heating is performed until the set temperature is reached, the set time is kept, then heating and natural cooling are stopped, cooling is performed until the set temperature is reached, rapid cooling is performed, rapid cooling is stopped until the set time is reached, and the exhaust valve is opened, so that one working cycle is completed. In order to facilitate the operator to check the historical data, the storage module 208 stores the daily operation data, the storage module 208 can check 10000 pieces of data in the latest time, if the data exceeding 10000 pieces of data are stored in the storage module 208, the data longer than 10000 pieces of time can be automatically deleted, the condition that the storage module 208 is full of memory can not occur, and the equipment operation can be checked under the unattended state. In conclusion, the intelligent operation of the vacuum furnace device is realized by arranging the installation control system on the vacuum furnace device, and the vacuum furnace device can be operated autonomously through the cooperation of the module and the sensor. The automatic control can be directly and independently performed without manual control, and the autonomy of the tubular vacuum furnace device is improved. The interlocking system is arranged by the controller 301, the resistance vacuum gauge 210 and the control system, so that the operation safety of the tubular vacuum furnace device is improved, the application of different environments and different scenes is met, the adaptability of the control system is improved, and the tubular vacuum furnace device is widely used for vacuum non-oxidation annealing, tempering, reduction, aging heat treatment, brazing and other heat treatment processes of titanium and titanium alloy materials in dentistry, orthopaedics and the like in the 3D printing industry by universities, scientific research institutions and industrial and mining enterprises.

It is important to note that the construction and arrangement of the application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of present application. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present applications. Therefore, the application is not limited to the specific embodiments, but extends to various modifications that nevertheless fall within the scope of the appended claims.

Furthermore, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those not associated with the best mode presently contemplated for carrying out the application, or those not associated with practicing the application).

It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure.

It should be noted that the above embodiments are only for illustrating the technical solution of the present application and not for limiting the same, and although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present application may be modified or substituted without departing from the spirit and scope of the technical solution of the present application, which is intended to be covered in the scope of the claims of the present application.

Claims

1. The tubular vacuum furnace device for 3d printing comprises a box body (101), and is characterized in that a vacuum container (102) is arranged in the box body (101), the vacuum container (102) is formed by welding alloy flange water-cooled tube bodies, a hearth (103) is arranged in the vacuum container (102), and the hearth (103) is formed by splicing polycrystalline alumina fibers; a silicon carbide rod (104) is arranged on the outer side of the hearth (103), and the silicon carbide rod (104) is uniformly fixed on the periphery of the hearth (103) for annular heating; one end of the vacuum container (102) is provided with a furnace door (105), the inner side of the furnace door (105) is provided with a heat preservation furnace plug (109), the heat preservation furnace plug (109) consists of a plurality of heat insulation plugs (110), and a vacuum circular pipe extending out of the outer side of the furnace door (105) is provided with a vacuum air release valve (111); the vacuum furnace is characterized in that a furnace frame (108) is arranged outside the vacuum furnace body (102), the furnace frame (108) is connected with the box body (101) through bolts, and an automatic control display screen (200) is arranged on the box body (101).

2. The tube vacuum furnace apparatus for 3d printing of claim 1, wherein: the vacuum liner (102) is provided with a vacuum air inlet pipeline (112), and the vacuum air inlet pipeline (112) is connected with a vacuum pump (113) through a corrugated pipe.

3. A tube vacuum furnace apparatus for 3d printing according to claim 2, wherein: the vacuum furnace is characterized in that a double air-cooled furnace shell (107) is arranged outside the vacuum furnace (102), the double air-cooled furnace shell (107) is connected with a cold air assembly (600), and the double air-cooled furnace shell (107) is arranged on the furnace frame (108).

4. The tube vacuum furnace apparatus for 3d printing of claim 1, wherein: the furnace door (105) is provided with a flange locking unit (700), and a sealing ring is arranged in the flange locking unit (700).

5. A control system, characterized by: a tube vacuum furnace device for 3d printing according to any one of claims 1-4, and comprising a temperature control assembly (300), a vacuum assembly (400) and an interlocking assembly (500), wherein the vacuum assembly (400) comprises a vacuum electromagnetic valve (302), a vacuum pressure gauge (303), a vacuum pump (113), a flange locking unit (700) and a vacuum release valve (111); the temperature control assembly (300) comprises a temperature sensor (304), a controller (301), a silicon carbide rod (104), a temperature control instrument (305) and a cold air assembly (600).

6. The control system of claim 6, wherein: the interlocking assembly (500) comprises a fault module (501), an alarm module (502), a start-stop module (503) and a controller (301), wherein the fault module (501) is electrically connected with the start-stop module (503) and the controller (301), and the alarm module (502) is electrically connected with the controller (301) and the display screen (200).

7. The control system of claim 6, wherein: the temperature control assembly (300), the vacuum assembly (400) and the interlocking assembly (500) are electrically connected with the display screen (200) through signal lines, the display screen (200) further comprises an electric heat sensor (201), an air switch module (202), a time relay (203), a resistance module (204), a power switch (205), a signal receiving and transmitting module (206), a sensor communication module (207), a storage module (208), a data monitoring module (209) and a resistance vacuum gauge (210), and the electric heat sensor (201), the data monitoring module (209), the storage module (208) are electrically connected with the air switch module (202) and the resistance module (204); the time relay (203), the sensor communication module (207) and the signal receiving and transmitting module (206) are electrically connected, and the storage module (208), the resistance vacuum gauge (210), the controller (301) and the power switch (205) are electrically connected.