阅读说明：本技术 硫系玻璃微球的3d打印方法及3d打印装置 (3D printing method and 3D printing device for chalcogenide glass microspheres ) 是由 赵华 周鹏 祖成奎 刘永华 张瑞 马明俊 韩滨 牟小庆 马桂君 于 2021-09-30 设计创作，主要内容包括：本发明是关于一种硫系玻璃微球的3D打印方法及3D打印装置,该硫系玻璃微球的3D打印方法,包括：将丝状硫系玻璃耗材按照设定的推送速率送至3D打印区域；在3D打印区域,采用双激光光束加热熔融进入3D打印区域的丝状硫系玻璃耗材,形成硫系玻璃微球熔滴,同时向所述的3D打印区域引入气体使形成的硫系玻璃微球熔滴悬浮,通过气动悬浮控制硫系玻璃微球的成形尺寸；采用真空吸附方式的取出形成的硫系玻璃微球。气体悬浮激光熔制方式可以保证微球的圆度,玻璃微球的孔径可以根据气体速度和流量进行控制,配合真空吸附取样,可以快速实现特定孔径的硫系玻璃微球批量制备,可以极大提高硫系玻璃微球的3D打印熔制效率。(The invention relates to a 3D printing method and a 3D printing device for chalcogenide glass microspheres, wherein the 3D printing method for the chalcogenide glass microspheres comprises the following steps: sending the filiform chalcogenide glass consumables to a 3D printing area according to a set pushing speed; in the 3D printing area, heating and melting the filamentous chalcogenide glass consumable material entering the 3D printing area by adopting double laser beams to form chalcogenide glass microsphere molten drops, introducing gas into the 3D printing area to suspend the formed chalcogenide glass microsphere molten drops, and controlling the forming size of chalcogenide glass microspheres through pneumatic suspension; and taking out the formed chalcogenide glass microspheres in a vacuum adsorption mode. The roundness of the glass microspheres can be guaranteed by a gas suspension laser melting mode, the aperture of the glass microspheres can be controlled according to the gas speed and the flow, the batch preparation of the chalcogenide glass microspheres with specific apertures can be realized quickly by matching with vacuum adsorption sampling, and the 3D printing melting efficiency of the chalcogenide glass microspheres can be greatly improved.)

1. A3D printing method of chalcogenide glass microspheres is characterized by comprising the following steps:

sending the filiform chalcogenide glass consumables to a 3D printing area according to a set pushing speed;

in the 3D printing area, heating and melting the filamentous chalcogenide glass consumable material entering the 3D printing area by adopting double laser beams to form chalcogenide glass microsphere molten drops, introducing gas into the 3D printing area to suspend the formed chalcogenide glass microsphere molten drops, and controlling the forming size of chalcogenide glass microspheres through pneumatic suspension;

and taking out the formed chalcogenide glass microspheres in a vacuum adsorption mode.

2. The 3D printing method of chalcogenide glass microspheres according to claim 1,

the 3D printing area is 1.0 multiplied by 10^-3Pa vacuum environment, cleanliness more than or equal to 10 ten thousand grade, inert gas filled, the purity of the inert gas more than or equal to 99.999%, water less than or equal to 5ppm, oxygen concentration less than or equal to 5 ppm.

3. The 3D printing method of chalcogenide glass microspheres according to claim 1,

the double laser beam heating melting comprises: two laser emitters are used, and the heating area and the heating temperature are controlled by adjusting the laser power of the laser emitters and the diameter of the laser spot.

4. The 3D printing method of chalcogenide glass microspheres according to claim 3,

the laser power of the laser emitter and the diameter of the laser spot are set according to the size of the chalcogenide glass microsphere to be printed.

5. The 3D printing method of chalcogenide glass microspheres according to claim 3,

the size of the chalcogenide glass microspheres is controlled by regulating and controlling the output beam mode, energy distribution, spot size and energy flux density of the laser emitted by the laser emitter.

6. The 3D printing method of chalcogenide glass microspheres according to claim 1,

controlling the forming size of the chalcogenide glass microspheres by adjusting the gas flow speed of gas and controlling the forming size of the chalcogenide glass microspheres;

and (3) preserving the heat of the formed chalcogenide glass microsphere molten drops by adjusting the temperature of the gas, and rapidly cooling the formed chalcogenide glass microspheres.

7. A3D printing device of chalcogenide glass microspheres is characterized by comprising:

the feeding mechanism comprises a reel and a pushing component connected with the reel, the reel is used for winding filiform chalcogenide glass consumables, and the pushing component is used for sending the filiform chalcogenide glass consumables on the reel to the 3D printing area;

the device comprises a first laser emitter and a second laser emitter, wherein a laser emitting end of the first laser emitter and a laser emitting end of the second laser emitter are symmetrically arranged up and down, a 3D printing area is formed in the middle, and the laser emitting end of the first laser emitter is positioned right below the laser emitting end of the second laser emitter and used for heating and melting a filamentous chalcogenide glass consumable entering the 3D printing area to form chalcogenide glass microsphere molten drops;

the pneumatic suspension mechanism at least comprises a section of vertical cylindrical cavity, the upper end of the cavity is a pneumatic suspension end, the lower end of the cavity is connected with a gas tank, the laser emitting end of the first laser emitter extends out of the pneumatic suspension end, the central line of the laser emitting end of the first laser emitter is superposed with the central line of the pneumatic suspension end, and the section diameter of the laser emitting end of the first laser emitter is smaller than that of the pneumatic suspension end;

the vacuum adsorption type sampling mechanism comprises a vacuum sucker and a telescopic arm, wherein the vacuum sucker is arranged at the end part of the telescopic arm and is used for taking out the formed chalcogenide glass microspheres in a vacuum adsorption mode;

the laser emission end of the first laser emitter, the laser emission end of the second laser emitter, the pneumatic suspension end of the pneumatic suspension mechanism and the vacuum adsorption type sampling mechanism are all arranged in a closed vacuum chamber.

8. The 3D printing device of chalcogenide glass microspheres of claim 7,

the first laser transmitter or the second laser transmitter comprises a shell, a laser transmitter regulating circuit and an optical fiber, wherein a laser chip is arranged in the shell; one end of the optical fiber is connected with the shell, and the other end of the optical fiber is a laser emitting end.

9. The 3D printing device of chalcogenide glass microspheres of claim 7,

the distance between the laser emitting end of the first laser emitter and the laser emitting end of the second laser emitter is 3-100 times of the diameter of the chalcogenide glass microsphere to be printed.

10. The device for 3D printing of chalcogenide glass microspheres of claim 7, further comprising:

the image acquisition mechanism is arranged in the vacuum chamber and is used for monitoring the forming state of the chalcogenide glass microspheres in real time;

the control mechanism is electrically connected with the feeding mechanism and is used for controlling the pushing rate of the filiform chalcogenide glass consumables; the first laser transmitter and the second laser transmitter are electrically connected and are used for controlling the first laser transmitter and the second laser transmitter; the device is electrically connected with the pneumatic suspension mechanism, the forming size of the chalcogenide glass microspheres is controlled by adjusting the gas flow speed and the flow of gas, the formed chalcogenide glass microsphere molten drops are insulated by adjusting the temperature of the gas, and the formed chalcogenide glass microspheres are cooled; the vacuum adsorption type sampling mechanism is electrically connected with the vacuum adsorption type sampling mechanism, the movement of the telescopic arm and the adsorption of the vacuum sucker are controlled, and the formed chalcogenide glass microspheres are taken out; and the forming state of the chalcogenide glass microspheres is monitored in real time by adjusting the lens of the image acquisition mechanism and the light intensity.

Technical Field

The invention relates to the technical field of secondary thermoforming of chalcogenide glass, in particular to a 3D printing method and a 3D printing device for chalcogenide glass microspheres.

Background

The optical microsphere cavity has extremely high quality factors and extremely small mode volume, and has great application prospects in the fields of quantum electrodynamics, low-threshold lasers, nonlinear optics, optical fiber communication, quantum optics, sensors and the like. The quality factor of the optical microsphere cavity mainly comprises diffraction loss, absorption loss and surface scattering loss in the microsphere cavity. The smaller the loss, the longer it will be stored in the cavity and the higher the quality factor if the light energy is captured into the cavity of the microsphere. Therefore, the better the surface flatness and sphericity of the microsphere cavity made of the dielectric material, the higher the quality factor of the microsphere cavity.

At present, the preparation method of the glass microsphere for the optical microsphere cavity mainly comprises a glass powder floating high-temperature melting method and CO₂The laser heating fiber core melting method is two. The glass powder floating high-temperature melting method has the advantages that the roundness of the microspheres can be ensured, the glass microspheres distributed in a certain numerical value interval can be prepared in batch at one time, and the method is extremely largeThe preparation efficiency is improved, but the defects are that the pore size distribution of the microspheres is in an interval range, and the batch preparation of the microspheres with specific pore sizes and high dimensional accuracy cannot be realized; CO 2₂The laser heating fiber core melting method has the advantages that the microsphere balling process is convenient to operate, but has the defects that: (1) most chalcogenide glass has photosensitivity, particularly the photoinduced refractive index is changed, so that the optical performance of the microsphere is unstable; (2) the power capable of being transmitted is low and easy to damage; (3) only one glass microsphere can be manufactured at one time, the size of the microsphere is limited by the photoelectric size, and the preparation method has low efficiency and high cost.

Disclosure of Invention

The invention mainly aims to provide a 3D printing method of chalcogenide glass microspheres, and aims to solve the technical problem that the obtained chalcogenide glass microspheres have the advantages of high aperture size precision, adjustable aperture and batch preparation. Realizes the batch preparation of the chalcogenide glass microspheres with high dimensional precision and adjustable specific pore diameter.

The purpose of the invention and the technical problem to be solved are realized by adopting the following technical scheme. According to the 3D printing method of the chalcogenide glass microspheres, which is provided by the invention, the method comprises the following steps:

sending the filiform chalcogenide glass consumables to a 3D printing area according to a set pushing speed;

in the 3D printing area, heating and melting the filamentous chalcogenide glass consumable material entering the 3D printing area by adopting double laser beams to form chalcogenide glass microsphere molten drops, introducing gas into the 3D printing area to suspend the formed chalcogenide glass microsphere molten drops, and controlling the forming size of chalcogenide glass microspheres through pneumatic suspension;

and taking out the formed chalcogenide glass microspheres in a vacuum adsorption mode.

The object of the present invention and the technical problems solved thereby can be further achieved by the following technical measures.

Preferably, in the 3D printing method of chalcogenide glass microspheres, the 3D printing area is 1.0 × 10^{- 3}Pa vacuum environment with cleanliness more than or equal to 10 ten thousand grade, filling inert gas with purity more than or equal to 99.999%, water less than or equal to 5ppm, oxygenThe concentration is less than or equal to 5 ppm.

Preferably, the 3D printing method of chalcogenide glass microspheres, wherein the dual laser beam heating and melting includes: two laser emitters are used, and the heating area and the heating temperature are controlled by adjusting the laser power of the laser emitters and the diameter of the laser spot.

Preferably, in the 3D printing method of chalcogenide glass microspheres, the laser power of the laser emitter and the diameter of the laser spot are set according to the size of the chalcogenide glass microspheres to be printed.

Preferably, in the 3D printing method of chalcogenide glass microspheres, the size of chalcogenide glass microspheres is controlled by controlling an output beam mode, energy distribution, spot size and energy flux density of laser emitted by the laser emitter.

Preferably, the 3D printing method of chalcogenide glass microspheres described above, wherein the forming size of the chalcogenide glass microspheres is controlled by adjusting the gas flow rate of the gas and controlling the flow rate;

and (3) preserving the heat of the formed chalcogenide glass microsphere molten drops by adjusting the temperature of the gas, and cooling the formed chalcogenide glass microspheres.

The object of the present invention and the technical problem to be solved are also achieved by the following technical means. According to the 3D printing device of chalcogenide glass microspheres provided by the invention, the 3D printing device comprises:

the feeding mechanism comprises a reel and a pushing component connected with the reel, the reel is used for winding filiform chalcogenide glass consumables, and the pushing component is used for sending the filiform chalcogenide glass consumables on the reel to the 3D printing area;

the device comprises a first laser emitter and a second laser emitter, wherein a laser emitting end of the first laser emitter and a laser emitting end of the second laser emitter are symmetrically arranged up and down, a 3D printing area is formed in the middle, and the laser emitting end of the first laser emitter is positioned right below the laser emitting end of the second laser emitter and used for heating and melting a filamentous chalcogenide glass consumable entering the 3D printing area to form chalcogenide glass microsphere molten drops;

the pneumatic suspension mechanism at least comprises a section of vertical cylindrical cavity, the upper end of the cavity is a pneumatic suspension end, the lower end of the cavity is connected with a gas tank, the laser emitting end of the first laser emitter extends out of the pneumatic suspension end, the central line of the laser emitting end of the first laser emitter is superposed with the central line of the pneumatic suspension end, and the section diameter of the laser emitting end of the first laser emitter is smaller than that of the pneumatic suspension end;

the vacuum adsorption type sampling mechanism comprises a vacuum sucker and a telescopic arm, wherein the vacuum sucker is arranged at the end part of the telescopic arm and is used for taking out the formed chalcogenide glass microspheres in a vacuum adsorption mode;

the laser emission end of the first laser emitter, the laser emission end of the second laser emitter, the pneumatic suspension end of the pneumatic suspension mechanism and the vacuum adsorption type sampling mechanism are all arranged in a closed vacuum chamber.

The object of the present invention and the technical problems solved thereby can be further achieved by the following technical measures.

Preferably, in the 3D printing apparatus for chalcogenide glass microspheres, the first laser emitter or the second laser emitter includes a housing in which a laser chip is disposed, a laser emitter adjusting circuit and an optical fiber, and the laser emitter adjusting circuit is disposed in the housing and is configured to adjust a temperature of the laser chip; one end of the optical fiber is connected with the shell, and the other end of the optical fiber is a laser emitting end.

Preferably, in the 3D printing device for chalcogenide glass microspheres, a distance between a laser emitting end of the first laser emitter and a laser emitting end of the second laser emitter is 3 to 100 times a diameter of the chalcogenide glass microspheres to be printed.

Preferably, the 3D printing apparatus for chalcogenide glass microspheres further includes:

the image acquisition mechanism is arranged in the vacuum chamber and is used for monitoring the forming state of the chalcogenide glass microspheres in real time;

the control mechanism is electrically connected with the feeding mechanism and is used for controlling the pushing rate of the filiform chalcogenide glass consumables; the first laser transmitter and the second laser transmitter are electrically connected and are used for controlling the first laser transmitter and the second laser transmitter; the device is electrically connected with the pneumatic suspension mechanism, the forming size of the chalcogenide glass microspheres is controlled by adjusting the gas flow speed and the flow of gas, the formed chalcogenide glass microsphere molten drops are insulated by adjusting the temperature of the gas, and the formed chalcogenide glass microspheres are cooled; the vacuum adsorption type sampling mechanism is electrically connected with the vacuum adsorption type sampling mechanism, the movement of the telescopic arm and the adsorption of the vacuum sucker are controlled, and the formed chalcogenide glass microspheres are taken out; and the forming state of the chalcogenide glass microspheres is monitored in real time by adjusting the lens of the image acquisition mechanism and the light intensity.

By the technical scheme, the 3D printing method and the 3D printing device of the chalcogenide glass microspheres, provided by the invention, have the following advantages at least:

1. the method adopts double laser beams to heat and melt the filiform chalcogenide glass consumable materials entering a 3D printing area to form chalcogenide glass microsphere molten drops, simultaneously introduces gas into the 3D printing area to suspend the formed chalcogenide glass microsphere molten drops, and controls the forming size of chalcogenide glass microspheres through pneumatic suspension; the roundness of the glass microspheres can be guaranteed by a gas suspension laser melting mode, the aperture of the glass microspheres can be controlled according to the gas speed and the flow, and after the chalcogenide glass microspheres are prepared, the chalcogenide glass microspheres with specific apertures can be rapidly prepared in batches by matching with vacuum adsorption sampling, so that the 3D printing melting efficiency of the chalcogenide glass microspheres can be greatly improved.

2. According to the invention, the upper and lower groups of laser emitters are arranged for 3D printing and melting, and the output beam mode, energy distribution, spot size and energy flux density of the laser emitters are regulated and controlled, so that the control of a sample heating area and heating temperature is realized, and the temperature unevenness can be effectively avoided; in a hot air flow suspension area formed by a pneumatic suspension system, the forming size of the glass microspheres is controlled by adjusting the air flow speed and controlling the flow rate, the uniformity of the temperature of molten drops of the glass microspheres is maintained, and the glass microspheres can be rapidly cooled after 3D printing and melting are finished; the glass microspheres which are close to the free surfaces are obtained by suspension melting, and the forming precision is high.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.

Drawings

Fig. 1 is a schematic structural diagram of a 3D printing apparatus for chalcogenide glass microspheres according to the present invention.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description will be made on the specific implementation, structure, features and effects of the 3D printing method and 3D printing apparatus for chalcogenide glass microspheres according to the present invention with reference to the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "an embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

The 3D printing method of the chalcogenide glass microspheres provided by the embodiment of the invention comprises the following steps:

(1) sending the filiform chalcogenide glass consumables to a 3D printing area according to a set pushing speed;

by arranging the feeding mechanism, the feeding mechanism comprises a reel and a pushing component connected with the reel, the filiform chalcogenide glass consumable is wound to the reel of the feeding mechanism, then the filiform chalcogenide glass consumable is accurately sent to a printing area through the pushing component, and a required pushing rate is controlled by a computer set program; the pushing rate is related to the diameter of the section of the filiform chalcogenide glass consumable material and the diameter of the chalcogenide glass microsphere to be printed, and the diameter of the chalcogenide glass microsphere can be determined by adjusting the pushing rate on the premise that the diameter of the section of the filiform chalcogenide glass consumable material is determined;

(2) in the 3D printing area, heating and melting the filamentous chalcogenide glass consumable material entering the 3D printing area by adopting double laser beams to form chalcogenide glass microsphere molten drops, introducing gas into the 3D printing area to suspend the formed chalcogenide glass microsphere molten drops, and controlling the forming size of chalcogenide glass microspheres through pneumatic suspension;

further, the 3D printing area is 1.0 multiplied by 10^-3Pa vacuum environment, cleanliness more than or equal to 10 ten thousand grade, and inert gases such as nitrogen, argon and the like filled in the vacuum environment, wherein the purity of the inert gases is more than or equal to 99.999 percent, the water vapor is less than or equal to 5ppm, and the oxygen concentration is less than or equal to 5 ppm.

The double-laser-beam heating and melting are carried out by setting the upper laser emitter and the lower laser emitter with the functions of adjusting the power and the diameter of the light spot, and the output beam mode, the energy distribution, the size of the light spot and the energy flux density are regulated and controlled, so that the aim of controlling the heating area and the heating temperature of the sample is fulfilled.

Furthermore, the laser power of the laser emitter and the diameter of the laser spot are set according to the size of the chalcogenide glass microspheres to be printed. For example, when the diameter of the printed chalcogenide glass microspheres is 300 microns, the power of the laser emitter is 10-200W, and the diameter of a light spot is 0.1-0.3 mm.

The gas flow velocity, flow and temperature of the gas are required to be regulated and controlled while the double laser beams are controlled to be heated and melted, and the forming size of the chalcogenide glass microspheres can be controlled by regulating the gas flow velocity and flow of the gas; the formed chalcogenide glass microsphere molten drops are insulated by adjusting the temperature of the gas, the temperature difference between the surface of the laser hot-melting sample and the surrounding environment can be reduced by adjusting the temperature of the gas, the uniformity of the temperature of the glass microsphere molten drops is favorably maintained, a hot airflow suspension area is formed in a pneumatic suspension system, the formed chalcogenide glass microspheres are cooled, and the temperature control precision is +/-3 ℃.

The annealing treatment auxiliary heating mode reduces the thermal stress of the chalcogenide glass microspheres, the temperature is controlled at 100 ℃ and 300 ℃ during working, and the temperature control precision is +/-3 ℃.

(3) And taking out the formed chalcogenide glass microspheres in a vacuum adsorption mode.

After the chalcogenide glass microspheres are formed, a vacuum adsorption type sampling mechanism is adopted, and a sampling platform rotates the side faces of the microspheres to finish sampling in a vacuum adsorption mode.

According to the embodiment, the temperature difference between the surface of the laser hot-melting sample and the surrounding environment can be reduced through the pneumatic suspension system, the uniformity of the temperature of molten drops of the glass microspheres can be maintained, the pneumatic suspension system forms a hot airflow suspension area, the forming size of the glass microspheres is controlled by adjusting the airflow speed, and the glass microspheres can be rapidly cooled after 3D printing and melting are completed, so that the new process problem of preparing the high-precision chalcogenide glass microspheres with specific aperture sizes and adjustable apertures is solved.

As shown in fig. 1, another embodiment of the present invention provides a 3D printing apparatus for chalcogenide glass microspheres, including:

the feeding mechanism 1 comprises a reel 11 and a pushing component 12, wherein the reel 11 is used for winding the filiform chalcogenide glass consumables 9, the pushing component 12 is used for sending the filiform chalcogenide glass consumables 9 on the reel to a 3D printing area, and the pushing speed of the pushing component 12 is controlled by a computer setting program;

the device comprises a first laser emitter 2 and a second laser emitter 3, wherein a laser emitting end of the first laser emitter and a laser emitting end of the second laser emitter are symmetrically arranged up and down, a 3D printing area is formed in the middle, and the laser emitting end of the first laser emitter is positioned right below the laser emitting end of the second laser emitter and used for heating and melting filamentous chalcogenide glass consumables entering the 3D printing area to form chalcogenide glass microsphere molten drops;

the pneumatic suspension mechanism 4 at least comprises a section of vertical cylindrical cavity, the upper end of the cavity is a pneumatic suspension end, the lower end of the cavity is connected with a gas tank 7, the laser emitting end of the first laser emitter extends out of the pneumatic suspension end, the central line of the laser emitting end of the first laser emitter is superposed with the central line of the pneumatic suspension end, and the section diameter of the laser emitting end of the first laser emitter is smaller than that of the pneumatic suspension end;

further, a gas heater 71 is connected between the gas tank 7 and the pneumatic suspension mechanism 4 for heating the gas in the gas tank 7 so that the gas is heated before entering the pneumatic suspension mechanism 4.

The vacuum adsorption type sampling mechanism 5 comprises a vacuum sucker 51 and a telescopic arm 52, wherein the vacuum sucker 51 is installed at the end part of the telescopic arm 52 and is used for taking out the formed chalcogenide glass microspheres 10 in a vacuum adsorption mode;

the laser emitting end of the first laser emitter, the laser emitting end of the second laser emitter, the pneumatic suspension end of the pneumatic suspension mechanism and the vacuum adsorption type sampling mechanism are all arranged in a closed vacuum chamber, and oxidation of chalcogenide glass is prevented.

Furthermore, the spatial position of the laser emitting end can be accurately adjusted through the three-dimensional displacement table, so that the position of the double-laser beam heating melting is regulated and controlled;

in the embodiment, the cleanliness of the external space environment of the 3D printing device is required to be more than 10 ten thousand levels, and the internal 3D printing space environment is a sealing structure; the internal 3D printing space environment requires high-purity inert gas atmosphere, wherein the purity condition of the introduced inert gas is superior to 99.999 percent, the concentration of water and oxygen is controlled below 5ppm, the concentration of water and oxygen is monitored in real time by adopting an online water oxygen analyzer, and a vacuum pumping system is configured in the equipment system, so that the purity of the inert gas is superior to 1.0 multiplied by 10^-3Pa high vacuum environment.

Furthermore, the first laser transmitter or the second laser transmitter comprises a shell, a laser transmitter regulating circuit and an optical fiber, wherein a laser chip is arranged in the shell, and the laser transmitter regulating circuit is arranged in the shell and used for regulating the temperature of the laser chip; one end of the optical fiber is connected with the shell, and the other end of the optical fiber is a laser emitting end.

Further, the laser transmitter adjusting circuit comprises:

a temperature detector for detecting a temperature of the laser chip;

the temperature adjusting piece is positioned in the laser transmitter and has unidirectional conductivity, and the temperature adjusting piece is used for controllably generating heat and transferring the generated heat to a laser chip in the laser transmitter; and the adjusting unit is connected with the temperature adjusting piece through a circuit and used for adjusting the signal intensity of the temperature adjusting piece, the signal intensity of the temperature adjusting piece is adjusted, and the heat generated by the temperature adjusting piece is adjusted so as to adjust the temperature of the laser chip through the heat generated by the temperature adjusting piece.

In some embodiments, the distance between the laser emitting end of the first laser emitter and the laser emitting end of the second laser emitter is 3-5 times the diameter of the chalcogenide glass microspheres to be printed.

The 3D printing device of chalcogenide glass microspheres further comprises:

the image acquisition mechanism 6 is arranged in the vacuum chamber and is used for monitoring the forming state of the chalcogenide glass microspheres in real time;

further, in some embodiments, a light source 61 is further provided to serve as a supplementary light source for the image capturing mechanism 6, and two image capturing mechanisms 6, such as high definition cameras, may be provided at opposite corners of the 3D printing area to monitor the formation state of the chalcogenide glass microspheres in real time more clearly.

The control mechanism, such as a PLC control mechanism, is electrically connected with the feeding mechanism and controls the pushing rate of the filiform chalcogenide glass consumables; the first laser emitter and the second laser emitter are electrically connected, the 3D printing area is controlled, and the heating area and the heating temperature are controlled by adjusting the laser power of the laser emitters and the diameter of laser spots; the gas flow velocity and the flow rate of the gas are regulated, the forming size of the chalcogenide glass microspheres is controlled, the gas is high-purity inert gas, the temperature of the gas is regulated to carry out heat preservation on formed chalcogenide glass microsphere molten drops, the formed chalcogenide glass microspheres are cooled to be about 50 ℃ below the glass transition temperature; the vacuum adsorption type sampling mechanism is electrically connected with the vacuum adsorption type sampling mechanism, the movement of the telescopic arm and the adsorption of the vacuum sucker are controlled, and the formed chalcogenide glass microspheres are taken out; and the forming state of the chalcogenide glass microspheres is monitored in real time by adjusting the lens of the image acquisition mechanism and the light intensity.

Further, the feeding end of the feeding mechanism 1, the laser emitting end of the first laser emitter 2, the laser emitting end of the second laser emitter 3, the pneumatic suspension mechanism 4 and the vacuum adsorption type sampling mechanism 5 are all arranged in the vacuum closed box.

Heat is generated during the laser 3D printing process, and therefore the vacuum enclosure is also connected with a cooling device 8 to cool the entire vacuum enclosure.

The 3D printing method of the chalcogenide glass microspheres provided by the invention combines three means of 3D printing and melting, pneumatic suspension microspheres and vacuum adsorption sampling, and realizes batch preparation of chalcogenide glass microspheres with high dimensional precision and adjustable specific pore diameter.

According to the invention, the roundness of the microspheres can be ensured by a gas suspension laser melting mode, the batch preparation of the chalcogenide glass microspheres with specific apertures can be rapidly realized, and the technical efficiency of 3D printing melting preparation can be greatly improved; meanwhile, the aperture of the glass microsphere can be controlled according to the gas velocity and the flow, the temperature unevenness can be effectively avoided through the upper group of laser emitters and the lower group of laser emitters, the glass microsphere similar to the free surface can be obtained through suspension melting, and the forming precision is high.

The present invention will be further described with reference to the following specific examples, which should not be construed as limiting the scope of the invention, but rather as providing those skilled in the art with certain insubstantial modifications and adaptations of the invention based on the teachings of the invention set forth herein.

In the following examples of the present invention, unless otherwise specified, all the components referred to are commercially available products well known to those skilled in the art, and if not specified, all the methods referred to are conventional methods.

Examples

A3D printing method of chalcogenide glass microspheres comprises the following steps:

(1) 0.3mm thread-shaped chalcogenide glass consumable Ge₁₂Sb₂₈Se₆₀Sending the printing paper to a 3D printing area according to the pushing speed of 10 mm/s;

(2) in the 3D printing area, fusing filamentous chalcogenide glass consumables entering the 3D printing area by adopting 20W double laser beam heating power to form chalcogenide glass microsphere molten drops of about 0.3mm, introducing gas into the 3D printing area, suspending the formed chalcogenide glass microsphere molten drops at the gas flow rate, and controlling the forming size of chalcogenide glass microspheres through pneumatic suspension;

(3) and taking out the formed chalcogenide glass microspheres in a vacuum adsorption mode.

The diameter of the glass microsphere is about 0.3mm measured by an optical microscope or a scanning electron microscope, the eccentricity is 0.5 percent, and the surface smoothness of the glass microsphere is 0.6nm characterized by an optical profilometer.

In the description of the present invention, it should be noted that the terms "upper", "lower", "horizontal", "vertical", and the like indicate orientations or positional relationships based on methods or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In addition, in the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.