CN216632601U

CN216632601U - Thin 3D printing device that takes of amorphous based on high frequency pulse power

Info

Publication number: CN216632601U
Application number: CN202123301210.9U
Authority: CN
Inventors: 李波波; 刘靖驰; 卢秉恒; 朱刚; 王博昌; 王琳鑫
Original assignee: National Institute Corp of Additive Manufacturing Xian
Current assignee: National Institute Corp of Additive Manufacturing Xian
Priority date: 2021-12-24
Filing date: 2021-12-24
Publication date: 2022-05-31
Anticipated expiration: 2031-12-24

Abstract

The utility model discloses an amorphous thin strip 3D printing device based on a high-frequency pulse power supply, wherein an amorphous thin strip conveying mechanism is used for conveying an amorphous thin strip to a substrate; the printing head mechanism is positioned above the substrate, and the printing head mechanism and the substrate can move relatively; a first pole and a second pole of the high-frequency pulse power supply are respectively and electrically connected with the printing head mechanism and the substrate, wherein the first pole is a positive pole, and the second pole is a negative pole, or the first pole is a negative pole, and the second pole is a positive pole; the high-frequency pulse power supply and the pressure sensor are both connected with the control system; the pressure sensor is arranged on the printing head mechanism and used for acquiring the contact pressure between the printing head mechanism and the amorphous thin strip on the substrate; the control system is used for controlling the high-frequency pulse power supply to output pulse current according to the magnitude relation between the contact pressure and a preset pulse current trigger pressure threshold value. The utility model solves the problems of complex system, high energy consumption and strict requirements on manufacturing environment in the manufacturing of the existing amorphous alloy parts.

Description

Thin 3D printing device that takes of amorphous based on high frequency pulse power

Technical Field

The utility model relates to the field of metal additive manufacturing, in particular to an amorphous thin strip 3D printing device based on a high-frequency pulse power supply.

Background

Additive Manufacturing (AM) is commonly known as 3D printing, combines computer-aided design, material processing and molding technologies, and is a Manufacturing technology for Manufacturing solid articles by stacking special metal materials, non-metal materials and medical biomaterials layer by layer in modes of extrusion, sintering, melting, photocuring, spraying and the like through a software and numerical control system on the basis of a digital model file. Compared with the traditional processing mode of removing, cutting and assembling raw materials, the method is a manufacturing method through material accumulation from bottom to top, and is from top to bottom. This enables the manufacture of complex structural components that were previously constrained by conventional manufacturing methods and were not possible.

The amorphous alloy has excellent mechanical properties such as high strength, high wear resistance, high elasticity and the like. However, amorphous alloys are difficult to form compared to common metallic materials. The preparation principle of the amorphous alloy is that the amorphous alloy is solidified by super-quenching, atoms are not in time of orderly arrangement and crystallization when the alloy is solidified, the obtained solid alloy is in a long-range disordered structure, molecules (or atoms and ions) forming the amorphous alloy are not in a spatially regular periodicity, and crystal grains and crystal boundaries of the crystalline alloy do not exist. The amorphous alloy shows excellent performances which are difficult to compare favorably with a plurality of conventional metal materials due to unique structural characteristics, simultaneously has the characteristics of heredity, memory, soft magnetism, large magnetic entropy and the like, and has the characteristics of excellent armor piercing performance, precise net forming processing, excellent corrosion resistance and the like, so that the amorphous alloy is considered to be a new generation metal material with important application prospect in the industries of military weapons, aerospace, biomedical treatment, electronic equipment, sports and the like.

However, it is well known that most amorphous alloys become brittle due to crystallization, structural relaxation, or thermally induced phase separation. At the same time, amorphous alloys are susceptible to oxidation, which not only leads to embrittlement, but also increases the critical cooling rate required for glass formation. Therefore, it is difficult to join amorphous alloys by a conventional fusion process even in the presence of an inert gas. At present, the preparation method of the amorphous alloy part mainly comprises a thermoplastic forming method, a powder sintering method, a welding assembly method, an additive manufacturing method and the like. Thermoplastic forming methods (such as molding, blow molding, etc.) have difficulty in producing large-sized parts of complex shapes; although the latter three methods break through the problem of size limitation, the powder sintering method requires a die and a sintering furnace for preparation, and the forming process is relatively complicated; the performance difference between the welding part and the base body during welding and assembling limits the application range of the parts; in the forming process of additive manufacturing (such as selective laser melting of amorphous powder), the high-energy beam additive manufacturing method represented by laser has the problems of high equipment manufacturing cost, complex equipment, larger volume, radiation pollution, low forming speed under the same power and the like. Therefore, a novel amorphous alloy large-size complex part low-cost and high-efficiency forming method is very important.

For example, patent document CN109465442A discloses a forging/additive composite manufacturing method for amorphous alloy parts, and specifically discloses a method for manufacturing an amorphous alloy powder material into a pre-forged blank by using a powder sintering technology, then placing the pre-forged blank into a closed forging mold for closed hot die forging to obtain a main structure of the amorphous alloy part, and finally processing a local fine structure with a small relative size or some structures which cannot be formed by forging, such as thin-walled reinforcing plates, hollow shells, conformal cooling channels, etc., on the main structure by using an energy field assisted additive manufacturing technology. Correspondingly, the forging/material increase composite manufacturing method for the large-size complex amorphous alloy part is obtained, and particularly, the interface connection performance between the main amorphous alloy structure and the local fine structure is strengthened and improved. However, the amorphous alloy disclosed in the patent has a complex forming process, high amorphous alloy cost, large occupied volume and space of the device and high system cost.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems in the prior art, the utility model provides an amorphous thin belt 3D printing device based on a high-frequency pulse power supply, and aims to solve the problems of complex system, large equipment occupation space, high energy consumption and strict requirements on manufacturing environment in the existing amorphous alloy part manufacturing.

In order to solve the technical problems, the utility model is realized by the following technical scheme:

an amorphous thin-strip 3D printing device based on a high-frequency pulse power supply comprises the high-frequency pulse power supply, a printing head mechanism, a pressure sensor, a substrate, a control system and an amorphous thin-strip conveying mechanism, wherein the amorphous thin-strip conveying mechanism is used for conveying an amorphous thin strip onto the substrate; the printing head mechanism is positioned above the substrate, and the printing head mechanism and the substrate can move relatively; a first pole and a second pole of the high-frequency pulse power supply are respectively and electrically connected with the printing head mechanism and the substrate, wherein the first pole is a positive pole, and the second pole is a negative pole, or the first pole is a negative pole, and the second pole is a positive pole; the high-frequency pulse power supply and the pressure sensor are both connected with the control system; the pressure sensor is arranged on the printing head mechanism and used for acquiring the contact pressure between the printing head mechanism and the amorphous thin strip on the substrate; the control system is used for controlling the high-frequency pulse power supply to output pulse current according to the magnitude relation between the contact pressure and a preset pulse current trigger pressure threshold value.

The amorphous thin belt conveying mechanism comprises an amorphous thin belt winding disc, a tensioning wheel mechanism, an idler wheel, a driving wheel, a driven wheel and a thin belt guiding mechanism, wherein cylindrical surfaces of the driving wheel and the driven wheel are close to each other to form a gap for an amorphous thin belt to pass through, the thin belt guiding mechanism is arranged at a position close to the upper end surface of the substrate, and one end of an amorphous thin belt on the amorphous thin belt winding disc sequentially passes through the tensioning wheel mechanism and the idler wheel and then sequentially passes through the gap formed by the driving wheel and the driven wheel and the thin belt guiding mechanism.

Further, the amorphous thin strip conveying mechanism further comprises a shearing mechanism, and the shearing mechanism is arranged at the outlet position of the thin strip guiding mechanism.

Furthermore, the printing device further comprises a lifting mechanism and a moving platform, wherein the lifting mechanism is positioned above the moving platform, the lifting mechanism and the moving platform are connected with the control system, the printing head mechanism is arranged on the lifting mechanism, and the substrate is arranged on the moving platform.

Further, an insulating plate is arranged between the base plate and the motion platform.

Further, beat printer head mechanism and include the sleeve, beat printer head, fastening gasket, gland and connecting bolt, beat printer head and keep away from the one end of base plate stretches into in the sleeve, pressure sensor is located in the sleeve and with beat printer head and keep away from the one end contact of base plate, the fastening gasket passes through connecting bolt connects telescopic lower extreme realization is right beat printer head's fixed, the gland passes through connecting bolt connects telescopic upper end realization is right pressure sensor's fixed.

Furthermore, an elastic buffer mechanism is arranged between one end of the printing head and the pressure sensor.

The elastic buffer mechanism comprises a slide way which is arranged downwards along one end of the printing head, a T-shaped slide block which is arranged in the slide way in a sliding mode, and an elastic piece which is sleeved on the T-shaped slide block, wherein the upper end face of the T-shaped slide block is in contact with the pressure sensor, one end of the elastic piece abuts against one end of the printing head, and the other end of the elastic piece abuts against the T-shaped slide block.

Further, one end of the printing head, which is close to the substrate, is pointed, planar or ball-shaped.

Further, the input of the high-frequency pulse power supply adopts alternating current 220V +/-10%, and the input frequency is 50Hz +/-10%; the output pulse frequency is in the range of hundred hertz to megahertz.

Furthermore, the high-frequency pulse power supply adopts an intermittent pulse output mode.

Compared with the prior art, the utility model has at least the following beneficial effects:

the utility model provides an amorphous thin strip 3D printing device based on a high-frequency pulse power supply, which realizes the welding effect of an amorphous thin strip by utilizing the heat generated by current when the device is powered on. Specifically, an amorphous thin strip is conveyed to a substrate through an amorphous thin strip conveying mechanism, a printing head mechanism and the substrate are respectively connected to a positive pole and a negative pole of a high-frequency pulse power supply, so that the printing head mechanism, the substrate and the high-frequency pulse power supply form a loop, when the printing head mechanism applies pressure to the amorphous thin strip on the substrate to a certain value, contact pressure acquired by a pressure sensor is used as a trigger signal of pulse current output by the high-frequency pulse power supply, and when the contact pressure is larger than a preset pulse current trigger pressure threshold value, a control system controls the high-frequency pulse power supply to output the pulse current, namely, the control system enables the high-frequency pulse power supply to output a waveform current, and the amorphous thin strip between the printing head mechanism and the substrate is welded together instantly. The amorphous thin strip 3D printing system based on the high-frequency pulse power supply as the heat source can realize the welding of the amorphous thin strip by utilizing the instant heating capacity of the high-frequency pulse current, and because the welding process is very short, the heating time and the cooling time are very fast, the problem of heat accumulation in the 3D printing of the amorphous thin strip is solved, and the problems of cracking, warping, deformation and the like of the amorphous thin strip caused by thermal stress due to overlarge temperature gradient in the printing process are relieved. Meanwhile, the substrate is not required to be heated, the high-frequency pulse power supply is the only heat source for 3D printing of the amorphous thin strip, and the high-frequency pulse power supply is designed and realized according to the type of the amorphous thin strip and the specific welding process requirements. The high-frequency pulse power supply has lower cost than a laser and the like, and the whole structure is simple and convenient. When a laser is used for printing metal materials, laser energy loss is inevitable, the reflectivity can reach 60-98%, and the reflectivity changes along with the surface temperature, which is particularly important for thin strip welding. When the high-frequency pulse power supply is used as a heat source to melt and weld the amorphous thin strip, the energy utilization rate is far higher than that of a laser, and the output energy is basically used for generating heat to melt the amorphous thin strip. The utility model has the characteristics of low power consumption, low cost, miniaturization and easy realization of automation.

Further, the material used by the utility model is an ultrathin amorphous thin strip, so that the wire blocking is easy, and the requirement on the delivery precision is high.

Further, the amorphous thin strip conveying mechanism further comprises a shearing mechanism, and the shearing mechanism is arranged at the outlet position of the thin strip guiding mechanism, so that the amorphous thin strip is conveniently sheared, and the delivery length is controlled.

Furthermore, the lifting mechanism can accurately detect the pressure applied by the printing head to the amorphous thin strip through the cooperation with a pressure sensor in the printing head mechanism, then the pressure is fed back to the control system and the high-frequency pulse power supply through the real-time detection feedback system of the rapid hammering pressure and is used as a pulse power supply output trigger signal, when the certain pressure generated by the printing head and the amorphous thin strip is detected, the pulse power supply outputs a pulse current, the pulse current triggers and flows through the pulse power supply when the pulse power supply is contacted every time when the pulse power supply is matched with the high-frequency pulse power supply, the welding combination of the amorphous thin strip is ensured, and meanwhile, higher heating speed and energy utilization rate can be obtained.

Furthermore, an insulating plate is arranged between the substrate and the motion platform, so that the substrate is prevented from forming a loop with the printing head mechanism from other places through the motion platform, and the insulating plate can enable current to flow along the contact part of the printing head mechanism and the substrate.

Further, one end of the printing head close to the substrate is pointed, flat or spherical so as to adapt to the printing requirements of different processes.

Furthermore, the high-frequency pulse power supply adopts an intermittent pulse output mode, and the output response time of intermittent pulses is extremely short.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic diagram of an amorphous thin-band 3D printing device based on a high-frequency pulse power supply according to the present invention;

FIG. 2, (a) is a schematic front view of a hard-contact tip printhead mechanism according to the present invention; (b) is a schematic cross-sectional view of a hard-contact tine printhead mechanism of the present invention;

FIG. 3 (a) is a schematic front view of a hard-contact flat head printhead mechanism according to the present invention; (b) is a schematic cross-sectional view of the hard-contact flat head printhead mechanism of the present invention;

fig. 4, (a) is a schematic front view of a ball-head print head mechanism of the hard contact type according to the present invention; (b) is a schematic cross-sectional view of the hard-contact ball-head printhead mechanism of the present invention;

FIG. 5 (a) is a schematic front view of a hard-contact tip printhead structure with a buffer structure according to the present invention; (b) is a cross-sectional schematic view of the hard contact type cusp-shaped print head mechanism with the buffer structure of the utility model;

FIG. 6 (a) is a schematic front view of a hard-contact flat head printhead structure with a buffer structure according to the present invention; (b) is a schematic cross-sectional view of the hard contact flat head print head mechanism with the buffer structure;

fig. 7, (a) is a schematic front view of a hard-contact type ball-head print head mechanism with a buffer structure according to the present invention; (b) is a schematic cross-sectional view of the hard contact type ball head print head mechanism with the buffer structure;

FIG. 8 is a schematic view of an amorphous thin strip conveying mechanism according to the present invention.

In the figure: 1-high frequency pulse power supply; 2-a print head mechanism; 201-a sleeve; 202-a print head; 203-fastening washer; 204-a gland; 205-connecting bolts; 206-a resilient buffer mechanism; 207-a slide; 208-T shaped slide block; 209-an elastic member; 3-a pressure sensor; 4-a substrate; 5-a control system; 6-amorphous thin strip conveying mechanism; 601-amorphous thin strip winding disc; 602-a tensioner mechanism; 603-an idler wheel; 604-a driving wheel; 605-driven wheel; 606-a thin strip guiding mechanism; 607-a shearing mechanism; 7-a lifting mechanism; 8-a motion platform; 9-an insulating plate; 10-a base; 11-mounting frame.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, an amorphous ribbon 3D printing apparatus based on a high-frequency pulse power supply according to an embodiment of the present invention includes a high-frequency pulse power supply 1, a print head mechanism 2, a pressure sensor 3, a substrate 4, a control system 5, and an amorphous ribbon conveying mechanism 6, wherein the amorphous ribbon conveying mechanism 6 is configured to convey an amorphous ribbon onto the substrate 4. The printing head mechanism 2 is located above the substrate 4, the printing head mechanism 2 and the substrate 4 can move relatively, specifically, the printing head mechanism 2 can move up and down relative to the substrate 4, the substrate 4 can move back and forth and left and right relative to the printing head mechanism 2, in this embodiment, the printing device further comprises a lifting mechanism 7 and a moving platform 8, the lifting mechanism 7 is located above the moving platform 8, the lifting mechanism 7 and the moving platform 8 are both connected with the control system 5, the printing head mechanism 2 is arranged on the lifting mechanism 7, the substrate 4 is arranged on the moving platform 8, and the lifting mechanism 7 and the moving platform 8 are controlled by the control system 5 to move correspondingly. Preferably, an insulating plate 9 is provided between the base plate 4 and the motion platform 8.

The high-frequency pulse power supply 1 has a first pole and a second pole electrically connected to the print head mechanism 2 and the substrate 4, respectively, wherein the first pole is a positive pole and the second pole is a negative pole, or the first pole is a negative pole and the second pole is a positive pole. The high-frequency pulse power supply 1 and the pressure sensor 3 are both connected with a control system 5. The pressure sensor 3 is arranged on the printing head mechanism 2, the pressure sensor 3 is used for collecting the contact pressure between the printing head mechanism 2 and the amorphous thin strip on the substrate 4, and the contact pressure collected by the pressure sensor 3 is used as a trigger signal of the pulse current output by the high-frequency pulse power supply 1. The control system 5 is used for controlling the high-frequency pulse power supply 1 to output the pulse current according to the magnitude relation between the contact pressure and the preset pulse current trigger pressure threshold, and specifically, when the contact pressure is greater than the preset pulse current trigger pressure threshold, the control system 5 controls the high-frequency pulse power supply 1 to output the pulse current. In this embodiment, the control system 5 controls the high-frequency pulse power supply 1 to output a pulse current with adjustable size and span, so as to weld the amorphous thin strips together, and then the printing head mechanism 2 and the substrate 4 are matched with each other through relative movement to complete 3D molding. The high-frequency pulse power supply is adopted, so that only one pulse current is output during connection every time, and adverse effects such as welding through or crack generation caused by overlarge output energy of the amorphous thin strip are avoided.

Preferably, the input of the high-frequency pulse power supply 1 adopts alternating current 220V +/-10%, and the input frequency is 50Hz +/-10%; the output pulse frequency can be adjusted within the range of hundred hertz to megahertz, and the output control mode is divided into a voltage stabilization mode and a current stabilization mode; the electric energy form can be direct current or alternating current, and is characterized by a low-voltage high-current mode which is matched according to the material to be printed and the process. The output voltage and the current value are continuously adjustable from zero to a rated value, the constant voltage and the constant current are automatically switched according to the load characteristics, the current voltage is set randomly in the rated range, and the current value which can meet the requirement of amorphous thin strip welding is output according to the process requirement; the protection modes are short-circuit protection, voltage-limiting protection, current-limiting protection, over-temperature protection, open-phase automatic protection and the like; the output frequency can be adjusted to output in multiple gears; the output pulse width is adjustable within a certain range. The high-frequency pulse power supply adopts an intermittent pulse output mode, and the output response time of intermittent pulses is extremely short.

As shown in fig. 8, specifically, the amorphous ribbon conveying mechanism 6 includes an amorphous ribbon winding disk 601, a tension wheel mechanism 602, an idler wheel 603, a driving wheel 604, a driven wheel 605, and a ribbon guiding mechanism 606, wherein cylindrical surfaces of the driving wheel 604 and the driven wheel 605 are close to each other to form a slit through which the amorphous ribbon passes, the ribbon guiding mechanism 606 is provided at a position close to the upper end surface of the substrate 4, and one end of the amorphous ribbon on the amorphous ribbon winding disk 601 sequentially passes through the tension wheel mechanism 602 and the idler wheel 603, and then sequentially passes through the slit formed by the driving wheel 604 and the driven wheel 605 and the ribbon guiding mechanism 606. Preferably, the amorphous thin strip conveying mechanism 6 further includes a cutting mechanism 607, and the cutting mechanism 607 is disposed at an exit position of the thin strip guiding mechanism 606. The amorphous ribbon delivery length is displayed in real time to the control system 5 to control its output length by the cutting mechanism 607.

An amorphous thin belt is fed into a system by an amorphous thin belt winding disc 601, the tension of the amorphous thin belt is adjusted by a tension wheel mechanism 602, the amorphous thin belt is fed into a gap formed between a driving wheel 604 and a driven wheel 605 by an idler wheel 603, meanwhile, the belt feeding speed of the amorphous thin belt is measured by the idler wheel 603 and fed back to a control system 5 for closed-loop control, the amorphous thin belt is fed to a guide mechanism 606 by the gap formed between the driving wheel 604 and the driven wheel 605, the driving wheel 604 is used for providing power, the driven wheel 605 is used for applying certain pressure to avoid errors caused by the slip of the amorphous thin belt, the guide mechanism 606 guides the amorphous thin belt to a specified position on a replaceable substrate 4, the actual belt outlet length of the amorphous thin belt is detected and fed back to the control system 5 for closed-loop control, and a shearing mechanism 607 is used for shearing the amorphous thin belt when the amorphous thin belt needs to be sheared. The driven wheel 605 is used for delivering the amorphous thin strip without slipping, and the amorphous thin strip is pressed by a spring and a roller wheel, and the pressing force can be adjusted by a spring clip top wire. The driving wheel 604 is coaxially connected with a motor and is used as a main power source of a delivery system, the amorphous thin strip is delivered to the guiding mechanism 606 under the compression of the driven wheel 605 through friction force, and the guiding mechanism 606 is used as a guiding device of the amorphous thin strip to deliver the amorphous thin strip to the substrate 4, so that the electric pressure hammering printing is realized.

As shown in fig. 2, 3 and 4, as a preferred embodiment of the present invention, the print head mechanism 2 includes a sleeve 201, a print head 202, a fastening gasket 203, a gland 204 and a connecting bolt 205, wherein an end of the print head 202 away from the substrate 4 extends into the sleeve 201, the pressure sensor 3 is located in the sleeve 201 and contacts with an end of the print head 202 away from the substrate 4, the fastening gasket 203 is connected to a lower end of the sleeve 201 through the connecting bolt 205 to fix the print head 202, and the gland 204 is connected to an upper end of the sleeve 201 through the connecting bolt 205 to fix the pressure sensor 3.

In addition to the above embodiments, as shown in fig. 5, 6, and 7, an elastic buffer mechanism 206 is further provided between one end of the print head 202 and the pressure sensor 3. Specifically, the elastic buffer mechanism 206 includes a slide channel 207 formed downward along one end of the print head 202, a T-shaped slide block 208 slidably disposed in the slide channel 207, and an elastic member 209 disposed on the T-shaped slide block 208, an upper end surface of the T-shaped slide block 208 is in contact with the pressure sensor 3, one end of the elastic member 209 abuts against one end of the print head 202, and the other end abuts against the T-shaped slide block 208. In this embodiment, the elastic member 209 is a spring.

As shown in fig. 1, the 3D printing apparatus of the present invention is fixed by a mounting base 10 and a mounting frame 11.

As shown in fig. 2 to fig. 7, the end of the print head 202 close to the substrate 4 may be designed to be pointed, flat or ball-shaped for different printing requirements.

The principle of the utility model is based on the fact that when the 3D printing device is powered on, the amorphous thin strip can be welded by using heat generated by current. The amorphous thin strip is conveyed to the substrate through the amorphous thin strip conveying mechanism, the printing head mechanism and the substrate are respectively connected to the positive pole and the negative pole of the high-frequency pulse power supply, the printing head mechanism, the substrate and the high-frequency pulse power supply form a loop, when the printing head mechanism applies pressure to the amorphous thin strip on the substrate to a certain value, contact pressure acquired by the pressure sensor serves as a trigger signal of pulse current output by the high-frequency pulse power supply, and when the contact pressure is larger than a preset pulse current trigger pressure threshold value, the control system controls the high-frequency pulse power supply to output the pulse current, namely, the control system enables the high-frequency pulse power supply to output a waveform current to weld the amorphous thin strip between the printing head mechanism and the substrate together instantly. Preferably, the present invention has an insulating plate between the substrate and the motion stage to prevent the substrate from forming a loop with the print head mechanism from elsewhere through the motion stage, and the insulating plate allows current to flow along the contact portion between the print head mechanism and the substrate. The amorphous thin strip is continuously delivered to the substrate along with the movement of the substrate under the delivery action of the amorphous thin strip conveying mechanism, and a shape with a certain scale can be formed on the substrate, such as the shape of a thin-wall hollow tube.

The lifting mechanism and the printing head mechanism realize the pressure extrusion and welding effects on the amorphous thin strip, and the pressure sensor in the printing head mechanism feeds back the pressure value applied to the substrate by the current printing head mechanism of the computer control system in real time so as to adjust the height of the lifting mechanism, so that the pressure of the printing head mechanism on the substrate is controlled, the pressure requirement on the material of the amorphous thin strip can be realized, and the crystallization is not generated after welding. Meanwhile, the pressure can be detected and adjusted, so that the amorphous thin strips made of different materials and meeting different process requirements can be welded, and the applicability is wider.

The rapid hammering pressure real-time detection feedback system is formed by the pressure sensor, the computer control system and the high-frequency pulse power supply in the printing head mechanism, the problem that current output by the high-frequency pulse power supply and the printing head mechanism are matched is solved, welding combination between layers of the amorphous thin strip is efficiently realized, the hammering speed of the printing head mechanism can be automatically set, the compactness degree of welding is automatically determined, and the high-compactness 3D forming of the amorphous thin strip is facilitated. Print the position switch-on circuit of printer head, output current in order to reach the welding effect when the printer head produces certain pressure to the base plate, the device is different from all printing processes of general 3D printing equipment and all need print under vacuum or argon gas environment simultaneously, and this equipment can be according to material difference and technological requirement and decide whether need add electrode atmosphere protection system, and this has practiced thrift the cost greatly, has improved the suitability of this equipment simultaneously. Meanwhile, because the contact time of the printing head and the substrate is extremely short, the high-frequency pulse power supply only outputs a waveform current once, so that the heat accumulation problem of the printing head part is reduced, the deformation of a printed article is reduced, and the forming quality is improved.

The motion platform system moves through a stepping motor, and the control part of the motion platform system is controlled by a computer control system. Because the device's particularity, motion platform system has splendid and prevents hitting anti-vibration effect, has current position self-locking function simultaneously, prevents to print the in-process because of the too big Z axle that causes of hammering pressure drops at the in-process of printing, influences the printing effect to have high accurate locate function, the precision can reach 0.002 mm.

The high-frequency pulse power supply is used as a heat input part of the device, and the positive electrode and the negative electrode of the high-frequency pulse power supply are connected with the printing head mechanism and the substrate to form a loop so as to supply current to generate heat. The current output by the high-frequency pulse power supply can be automatically adjusted according to different materials and different process requirements. In another embodiment, the pressure sensor is also connected with the high-frequency pulse power supply, the pressure value detected by the pressure sensor is used as a current trigger signal, the high-frequency pulse power supply sends out a waveform current for welding when the pressure value exceeds a preset trigger pressure threshold, and the trigger pressure threshold of the high-frequency pulse power supply and the pulse width of the output current are adjustable to meet different requirements.

The device also has the advantages of adjustable pulse current, pulse width and output current trigger pressure values, and the adjustable output current trigger pressure values can meet the requirements on the output time of the trigger current under different pressures.

The utility model relates to an amorphous thin belt 3D printing device based on a high-frequency pulse power supply, which comprises the following working steps:

1. and loading the model, adjusting parameters and slicing by using matched software. The model slice actually translates the 3D model described by the triangular patch into a G code instruction set that the 3D printer can execute, that is, the three-dimensional model in the format of star-stl is converted into G code that the 3D printer can use, through a specific algorithm.

2. Before printing, the amorphous thin belt winding disc is installed, parameters of a relevant motion platform are set, and the current output size, the current output width and the trigger pressure value of the high-frequency pulse power supply are set.

3. Starting a motion system, leveling a platform, delivering an amorphous thin strip to a substrate, starting a high-frequency pulse power switch and starting printing, softening and combining the amorphous thin strip materials with each other through high-frequency pulse current, subsequently delivering the amorphous thin strip for welding, accumulating layer by layer, and finally accumulating and forming.

4. In the printing process, the pressure sensor detects and feeds back the pressure of the printing head and the substrate, and the Z-axis position needs to be changed when each layer is added, so that the pressure of the printing head to the substrate is kept at a fixed value.

5. After printing is finished, internal stress eliminating operation is carried out according to the processing requirements of various materials, and the workpiece is removed after printing is finished.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the following descriptions are only illustrative and not restrictive, and that the scope of the present invention is not limited to the above embodiments: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The amorphous thin strip 3D printing device based on the high-frequency pulse power supply is characterized by comprising a high-frequency pulse power supply (1), a printing head mechanism (2), a pressure sensor (3), a substrate (4), a control system (5) and an amorphous thin strip conveying mechanism (6), wherein the amorphous thin strip conveying mechanism (6) is used for conveying an amorphous thin strip onto the substrate (4); the printing head mechanism (2) is positioned above the substrate (4), and the printing head mechanism (2) and the substrate (4) can move relatively; a first pole and a second pole of the high-frequency pulse power supply (1) are respectively and electrically connected with the printing head mechanism (2) and the substrate (4), wherein the first pole is a positive pole, and the second pole is a negative pole, or the first pole is a negative pole, and the second pole is a positive pole; the high-frequency pulse power supply (1) and the pressure sensor (3) are both connected with the control system (5); the pressure sensor (3) is arranged on the printing head mechanism (2), and the pressure sensor (3) is used for acquiring the contact pressure between the printing head mechanism (2) and the amorphous thin strip on the substrate (4); the control system (5) is used for controlling the high-frequency pulse power supply (1) to output pulse current according to the size relation between the contact pressure and a preset pulse current trigger pressure threshold value.

2. The high-frequency pulse power supply-based amorphous thin-strip 3D printing device according to claim 1, characterized in that the amorphous thin belt conveying mechanism (6) comprises an amorphous thin belt winding disc (601), a tension wheel mechanism (602), an idler wheel (603), a driving wheel (604), a driven wheel (605) and a thin belt guiding mechanism (606), the cylindrical surfaces of the driving wheel (604) and the driven wheel (605) are close to each other to form a gap for the amorphous thin belt to pass through, the thin strip guide mechanism (606) is arranged at a position close to the upper end face of the substrate (4), one end of the amorphous thin belt on the amorphous thin belt winding disc (601) sequentially winds through the tensioning wheel mechanism (602) and the idler wheel (603), and then sequentially passes through a gap formed by the driving wheel (604) and the driven wheel (605) and the thin belt guiding mechanism (606).

3. The 3D printing device for the amorphous thin strip based on the high-frequency pulse power supply as claimed in claim 2, wherein the amorphous thin strip conveying mechanism (6) further comprises a shearing mechanism (607), and the shearing mechanism (607) is arranged at an outlet position of the thin strip guiding mechanism (606).

4. The amorphous thin strip 3D printing device based on the high-frequency pulse power supply as claimed in claim 1, further comprising a lifting mechanism (7) and a moving platform (8), wherein the lifting mechanism (7) is located above the moving platform (8), the lifting mechanism (7) and the moving platform (8) are both connected to the control system (5), the print head mechanism (2) is disposed on the lifting mechanism (7), and the substrate (4) is disposed on the moving platform (8).

5. The thin amorphous ribbon 3D printing device based on high-frequency pulse power supply as claimed in claim 4, characterized in that an insulating plate (9) is arranged between the substrate (4) and the motion platform (8).

6. The device for 3D printing the amorphous thin strip based on the high-frequency pulse power supply as claimed in claim 1, characterized in that the printing head mechanism (2) comprises a sleeve (201), a printing head (202), a fastening gasket (203), a gland (204) and a connecting bolt (205), the end of the printing head (202) far away from the substrate (4) extends into the sleeve (201), the pressure sensor (3) is positioned in the sleeve (201) and is in contact with one end of the printing head (202) far away from the substrate (4), the fastening gasket (203) is connected to the lower end of the sleeve (201) through the connecting bolt (205) to realize the fixation of the printing head (202), the gland (204) is connected to the upper end of the sleeve (201) through the connecting bolt (205) to fix the pressure sensor (3).

7. The thin amorphous ribbon 3D printing device based on high-frequency pulse power supply as claimed in claim 6, characterized in that an elastic buffer mechanism (206) is further arranged between one end of the printing head (202) and the pressure sensor (3);

the elastic buffer mechanism (206) comprises a slide way (207) which is formed downwards along one end of the printing head (202), a T-shaped slide block (208) which is arranged in the slide way (207) in a sliding mode and an elastic piece (209) which is sleeved on the T-shaped slide block (208), the upper end face of the T-shaped slide block (208) is in contact with the pressure sensor (3), one end of the elastic piece (209) abuts against one end of the printing head (202), and the other end of the elastic piece abuts against the T-shaped slide block (208).

8. The thin amorphous ribbon 3D printing device based on high-frequency pulse power supply as claimed in claim 6, wherein the end of the printing head (202) close to the substrate (4) is pointed, flat or ball-shaped.

9. The 3D printing device for the amorphous thin strip based on the high-frequency pulse power supply is characterized in that the input of the high-frequency pulse power supply (1) adopts 220V +/-10% of alternating current, and the input frequency is 50Hz +/-10%; the output pulse frequency is in the range of hundred hertz to megahertz.

10. The 3D printing device for the amorphous thin strip based on the high-frequency pulse power supply as claimed in claim 1, characterized in that the high-frequency pulse power supply (1) adopts an intermittent pulse output mode.