Silk powder composite additive manufacturing device and system

Abstract

The present invention provides a silk powder composite additive manufacturing device and system, and relates to the field of additive manufacturing technology. The silk powder composite additive manufacturing device includes a wire feeding mechanism, on which a wire is installed; a nozzle, which is provided with a powder feeding channel, the cross section of the powder feeding channel along the radial direction of the nozzle is annular, the powder feeding channel is used to transport reinforcing phase powder, and the powder outlet end of the powder feeding channel faces the wire outlet end of the wire feeding mechanism, so that the movement direction of the reinforcing phase powder is close to the wire. The silk powder composite additive manufacturing device and system of the present invention, by arranging the nozzle with a powder feeding channel, and the cross section of the powder feeding channel along the radial direction of the nozzle is annular, increases the conveying area of ​​the reinforcing phase powder, improves the area and time of the reinforcing phase powder in contact with the electric arc, prevents the occurrence of enrichment areas inside the additive parts due to uneven powder feeding, and avoids affecting the performance of the additive parts.

Description

Technical Field

[0001] The present invention relates to the technical field of additive manufacturing, and in particular to a silk powder composite additive manufacturing device and system. Background Art

[0002] The use of additive manufacturing technology can achieve the purpose of rapid prototyping of complex parts, reduce manufacturing time and save costs.

[0003] With the development of diversified social needs, a single metal material can no longer meet the requirements of various industries for metal materials. In the existing technology, wire is used as the metal matrix of additive parts to ensure the high efficiency of the composite material preparation process and the density of the prepared materials. At the same time, powder materials such as ceramic powder and metal powder are used to provide the reinforcement phase of the metal matrix to realize the preparation of composite materials.

[0004] However, in the silk-powder composite additive manufacturing technology in the prior art, the powder material is prone to uneven powder feeding, and the uniformity of the fusion of the powder material and the wire droplet is difficult to ensure, which can easily cause enrichment areas to appear inside the additive parts, affecting the performance of the additive parts. Summary of the invention

[0005] The present invention provides a silk powder composite additive manufacturing device and system, which are used to solve the technical problem in the prior art that powder materials are prone to uneven powder feeding, which affects the performance of additive parts.

[0006] In a first aspect, the present invention provides a silk powder composite additive manufacturing device, comprising:

[0007] A wire feeding mechanism, equipped with wire material;

[0008] The nozzle is provided with a powder feeding channel, the powder feeding channel has a ring-shaped cross-section along the radial direction of the nozzle, the powder feeding channel is used to transport reinforcing phase powder, and the powder outlet end of the powder feeding channel faces the wire outlet end of the wire feeding mechanism so that the movement direction of the reinforcing phase powder is close to the wire material.

[0009] According to a silk-powder composite additive manufacturing device provided by the present invention, the silk material comprises a plurality of spherical parts and a plurality of neck parts, the outer diameter of the spherical parts is greater than the outer diameter of the neck parts, and the spherical parts and the neck parts are alternately distributed and coaxially arranged;

[0010] The wire feeding mechanism comprises a conductive nozzle, the conductive nozzle is equipped with two conductive sheets, the two conductive sheets are arranged opposite to each other, the conductive sheets are movably connected to the conductive nozzle, the ends of the conductive sheets have conductive contacts, the conductive contacts of the two conductive sheets are clamped at both sides of the wire material and are always in contact with the wire material;

[0011] The silk powder composite additive manufacturing device also includes a pulse power supply, which is electrically connected to the conductive sheet. When the conductive contact is in contact with the neck portion, the pulse power supply applies a strong pulse current to the conductive sheet to cause the wire to fuse at the neck portion; when the conductive contact is in contact with the spherical portion, the pulse power supply applies a base current.

[0012] According to a silk powder composite additive manufacturing device provided by the present invention, the silk powder composite additive manufacturing device further includes a detection component;

[0013] The detection component is electrically connected to the conductive contacts and is in communication connection with the pulse power supply. The detection component is used to detect the voltage between the two conductive contacts and send a strong pulse signal to the pulse power supply according to the voltage so that the pulse current applies the strong pulse current.

[0014] According to a silk-powder composite additive manufacturing device provided by the present invention, when the voltage is less than a preset voltage, the detection component sends the strong pulse signal to the pulse power supply.

[0015] According to a silk powder composite additive manufacturing device provided by the present invention, the silk powder composite additive manufacturing device also includes a heat-resistant shell, the heat-resistant shell is installed on the outer wall of the conductive nozzle, the detection component is arranged in the heat-resistant shell, and one end of the conductive sheet is rotatably installed in the heat-resistant shell.

[0016] According to a silk powder composite additive manufacturing device provided by the present invention, the silk powder composite additive manufacturing device further includes a conductive mechanism, and the conductive mechanism includes a fixed part and a rotating part with conductive ability;

[0017] The first end of the fixing member is fixed to the outer wall of the conductive nozzle, the rotating member is rotatably arranged at the second end of the fixing member, and one of the conductive sheets is connected to the fixing member so that the conductive mechanism is electrically connected to the conductive nozzle and one of the conductive sheets respectively.

[0018] According to a silk powder composite additive manufacturing device provided by the present invention, the silk powder composite additive manufacturing device also includes a wire, a micro power source and a protective resistor. The wire, the micro power source and the protective resistor are arranged in the heat-resistant shell, and the micro power source, the protective resistor, the detection component and the conductive sheet are electrically connected through the wire to form a closed loop.

[0019] According to a silk powder composite additive manufacturing device provided by the present invention, the powder feeding channel includes a first area and a second area connected to each other, the powder outlet end of the powder feeding channel is located in the second area, the length direction of the first area is parallel to the axial direction of the nozzle, and the inner diameter of the second area gradually decreases from the direction away from the wire outlet end of the wire feeding mechanism to the direction close to the wire outlet end.

[0020] In a second aspect, the present invention provides a silk powder composite additive manufacturing system, comprising the silk powder composite additive manufacturing device as described in the first aspect, and also comprising a substrate, wherein the substrate is arranged below the wire feeding mechanism of the silk powder composite additive manufacturing device and is spaced apart from the wire feeding mechanism.

[0021] According to a silk-powder composite additive manufacturing system provided by the present invention, the silk-powder composite additive manufacturing system further comprises a powder feeding drive device and a powder container, wherein the powder feeding drive device, the powder container and a powder feeding channel of the silk-powder composite additive manufacturing system are sequentially connected, and under the drive of the powder feeding drive device, the reinforcing phase powder enters the powder feeding channel from the powder container;

[0022] The powder feeding drive device is communicatively connected with the wire feeding mechanism to realize linkage control of powder feeding and wire feeding.

[0023] The silk-powder composite additive manufacturing device and system provided by the present invention increase the conveying area of ​​the reinforcing phase powder and improve the contact area and time of the reinforcing phase powder with the electric arc by arranging the nozzle with a powder feeding channel, and the reinforcing phase powder is in an annular shape in the radial direction of the nozzle, so that the reinforcing phase powder is melted in the electric arc to form liquid particles, which are uniformly adsorbed on the surface of the wire droplet and enter the molten pool with the droplet, thereby improving the uniformity of the fusion of the reinforcing phase powder and the wire, preventing the occurrence of enrichment areas inside the additive parts due to uneven powder feeding, and avoiding affecting the performance of the additive parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a schematic structural diagram of a silk powder composite additive manufacturing device provided by the present invention;

[0026] Figure 2 It is a schematic diagram of the local structure of the silk powder composite additive manufacturing device provided by the present invention when the conductive contact point is in contact with the neck portion;

[0027] Figure 3It is a schematic diagram of the local structure of the silk powder composite additive manufacturing device provided by the present invention when the conductive contact point is in contact with the spherical body part;

[0028] Figure 4 It is a structural schematic diagram of the silk powder composite additive manufacturing system provided by the present invention.

[0029] Reference numerals:

[0030] 1: wire feeding mechanism; 11: wire material; 111: spherical part; 112: neck part; 12: conductive nozzle; 13: conductive sheet; 131: conductive contact; 2: nozzle; 21: powder feeding channel; 210: reinforcing phase powder; 211: first area; 212: second area; 3: detection component; 4: heat-resistant shell; 51: fixed part; 52: rotating part; 6: wire; 7: micro power supply; 8: protective resistor; 100: substrate; 200: powder feeding drive device; 300: powder container; 400: powder flow controller; 500: adapter; 600: welding heat source; 700: cooling water tank; 800: protective gas container. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by the terms "upper", "lower", "inside", "outside", "left", "right", "axial", "circumferential", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] In the present invention, unless otherwise clearly defined and specified, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] like Figures 1 to 3 As shown, the present invention provides a silk powder composite additive manufacturing device, including a wire feeding mechanism 1 and a nozzle 2.

[0036] The wire feeding mechanism 1 is installed with a wire 11 , and the wire 11 can move along its own axial direction in the wire feeding mechanism 1 under the drive of the driving component to realize the wire feeding action.

[0037] The nozzle 2 is provided with a powder feeding channel 21, and the cross-section of the powder feeding channel 21 along the radial direction of the nozzle 2 is annular. The powder feeding channel 21 is used to transport the reinforcing phase powder 210. The powder outlet end of the powder feeding channel 21 faces the wire outlet end of the wire feeding mechanism 1 so that the movement direction of the reinforcing phase powder 210 is close to the wire 11.

[0038] In a specific embodiment, the nozzle 2 is arranged on the periphery of the wire feeding mechanism 1 .

[0039] In a specific embodiment, the powder feeding channel 21 is in a truncated cone-like cylindrical shape in the nozzle 2, and the cross-section of the powder feeding channel 21 along the axial direction of the nozzle 2 is generally in an inverted triangle shape, so that the movement path of the reinforcing phase powder 210 is inclined toward the wire outlet end of the wire feeding mechanism 1, thereby achieving uniform mixing of the reinforcing phase powder 210 and the wire molten droplet. The reinforcing phase powder 210 melts in the electric arc to form liquid particles, which are uniformly adsorbed on the surface of the wire molten droplet and enter the molten pool with the molten droplet, thereby improving the uniformity of the fusion of the reinforcing phase powder 210 and the wire 11.

[0040] It is understandable that in Figure 1 In the figure, the wire outlet end of the wire feeding mechanism 1 and the powder outlet end of the powder feeding channel 21 are both close to the lower end.

[0041] In a specific embodiment, the nozzle 2 includes a first body and a second body, a boss is provided at one end of the first body, an outer thread is provided at the outer periphery of the boss, an inner thread is provided at one end of the first body, the first body and the second body are connected by threads, and the outer wall of the first body except the boss is spaced apart from the inner wall of the second body to form a powder delivery channel 21. A plurality of through holes are spaced apart and distributed in an annular area on the boss corresponding to the powder delivery channel 21, and the plurality of through holes are distributed in a circle around the central axis of the first body, so that the reinforcing phase powder 210 can enter the powder delivery channel 21 through the through holes.

[0042] Compared with the design of providing a single powder feeding tube for powder feeding in the prior art, the powder feeding channel 21 in the embodiment of the present invention increases the conveying area of ​​the reinforcing phase powder 210, so that the reinforcing phase powder 210 can be attached around the wire 11 in a large range and at a wide angle, thereby increasing the area and time of contact between the reinforcing phase powder 210 and the arc, thereby improving the manufacturing efficiency and quality of additive parts.

[0043] The silk-powder composite additive manufacturing device provided by the present invention increases the conveying area of ​​the reinforcing phase powder 210 by arranging the nozzle 2 with a powder feeding channel 21, and the cross-section of the powder feeding channel 21 along the radial direction of the nozzle 2 is annular, thereby increasing the contact area and time of the reinforcing phase powder 210 with the electric arc, so that the reinforcing phase powder 210 is melted in the electric arc to form liquid particles, which are uniformly adsorbed on the surface of the wire droplet and enter the molten pool with the droplet, thereby improving the uniformity of the fusion of the reinforcing phase powder 210 and the wire 11, preventing the occurrence of enrichment areas inside the additive parts due to uneven powder feeding, and avoiding affecting the performance of the additive parts.

[0044] Furthermore, the wire 11 includes a plurality of spherical parts 111 and a plurality of constricted parts 112 . The outer diameter of the spherical parts 111 is greater than the outer diameter of the constricted parts 112 . The spherical parts 111 and the constricted parts 112 are alternately distributed and coaxially arranged.

[0045] The wire feeding mechanism 1 includes a conductive nozzle 12, which is equipped with two conductive sheets 13. The two conductive sheets 13 are arranged opposite to each other, and the conductive sheets 13 are movably connected to the conductive nozzle 12. The ends of the conductive sheets 13 have conductive contacts 131. The conductive contacts 131 of the two conductive sheets 13 are clamped on both sides of the wire 11 and are always in contact with the wire 11.

[0046] The silk-powder composite additive manufacturing device further includes a pulse power supply, which is electrically connected to the conductive sheet 13. When the conductive contact 131 is in contact with the neck portion 112, the pulse power supply applies a strong pulse current to the conductive sheet 13 to fuse the wire 11 at the neck portion 112. When the conductive contact 131 is in contact with the spherical portion 111, the pulse power supply applies a base current.

[0047] like Figure 2 and Figure 3 As shown, two conductive sheets 13 are arranged on the left and right sides of the conductive nozzle 12, and can be close to and separated from each other, thereby realizing the action of clamping and loosening. The two conductive sheets 13 are clamped on the outer wall surface of the wire 11, and as the wire 11 moves axially, the conductive sheets 13 are always closely attached to the outer wall surface of the wire 11.

[0048] In a specific embodiment, a torsion spring is connected to one end of the two conductive sheets 13 away from the wire 11, and the elastic deformation of the torsion spring realizes the relative movement of clamping and loosening of the two conductive sheets 13, and ensures that the two conductive sheets 13 are always in close contact with the outer wall of the wire 11.

[0049] The shape of the wire 11 is pre-processed, and the spherical part 111 and the neck part 112 are alternately and evenly distributed on the same straight line. When the conductive contact 131 is in contact with the neck part 112, the pulse power supply applies a strong pulse current to the conductive sheet 13, so that the wire molten droplets fall off under the combined effect of resistance heat and electromagnetic contraction force, ensuring that the size and shape of each wire molten droplet are consistent, ensuring the consistency and stability of the molten droplet transition, optimizing the transition of mass transfer during welding or additive manufacturing, and improving the shape control ability and forming efficiency of additive manufacturing.

[0050] Optionally, the pulse power supply can confirm that the conductive contact 131 is in contact with the constricted neck 112 or the spheroidal body 111 according to factors such as the opening angle of the conductive sheet 13, the time period of the conductive sheet 13 in contact with the spheroidal body 111 and the constricted neck 112, and the voltage of the wire 11 between the two conductive sheets 13, thereby confirming the application of the strong pulse current or the base current. It is understandable that the strong pulse current is greater than the base current.

[0051] In a specific embodiment, the silk powder composite additive manufacturing device further includes a detection component 3. The detection component 3 is electrically connected to the conductive contact 131 and is in communication connection with the pulse power supply. The detection component 3 is used to detect the voltage between the two conductive contacts 131 and send a strong pulse signal to the pulse power supply according to the voltage so that the pulse current applies a strong pulse current.

[0052] In this embodiment, the pulse power supply determines whether to apply a strong pulse current according to the voltage of the wire 11 between the two conductive sheets 13. Specifically, the detection component 3 detects the voltage between the two conductive sheets 13 in real time. According to the resistance calculation principle, the diameter of the wire 11 can be determined by the resistance. Since the diameter of the spherical body portion 111 is greater than the diameter of the neck portion 112, when the conductive contact 131 contacts the spherical body portion 111, the resistance is greater than the resistance when the conductive contact 131 contacts the neck portion 112. Therefore, according to the voltage division principle of the series circuit, the voltage when the conductive contact 131 contacts the spherical body portion 111 is greater than the voltage when the conductive contact 131 contacts the neck portion 112, so that the diameter of the wire 11 can be determined by detecting the voltage.

[0053] After the detection component 3 detects the voltage between the two conductive sheets 13, it confirms whether the current conductive contact 131 is in contact with the spherical body 111 or the constricted neck 112, thereby selectively sending a strong pulse signal to the pulse power supply. Specifically, when the constricted neck 112 at the small diameter of the wire 11 is detected, the detection component 3 sends a signal to the power supply, and the power supply responds and sends a strong pulse current, so that the wire droplet falls off at the end of the wire 11 under the strong electromagnetic contraction force.

[0054] In a specific embodiment, the detection component 3 is disposed at the periphery of the nozzle 2 and is insulated from the nozzle 2 .

[0055] In a specific embodiment, when the voltage is less than the preset voltage, the detection component 3 sends a strong pulse signal to the pulse power supply. After the detection component 3 detects the voltage between the two conductive sheets 13, it determines the numerical relationship between the voltage and the preset voltage, and sends a strong pulse signal to the pulse power supply when the voltage is less than the preset voltage, so that the wire 11 is melted at the neck 112. When the detection component 3 does not send a strong pulse signal, the pulse power supply applies a base current, or, when the voltage is greater than or equal to the preset voltage, the detection component 3 sends a base current signal to the pulse power supply, so that the pulse power supply applies a base current.

[0056] The silk powder composite additive manufacturing device also includes a heat-resistant shell 4, which is installed on the outer wall of the conductive nozzle 12, the detection component 3 is arranged in the heat-resistant shell 4, and one end of the conductive sheet 13 is rotatably installed in the heat-resistant shell 4.

[0057] The heat-resistant shell 4 can be made of heat-resistant materials such as graphite, heat-resistant ceramics, and high-temperature glass. The detection component 3 is arranged in the heat-resistant shell 4 to prevent the detection component 3 from being affected by the external temperature.

[0058] The heat-resistant shell 4 is annularly sleeved on the outer wall of the conductive nozzle 12, and can be assembled with the conductive nozzle 12 by means of a threaded connection, which is convenient for disassembly, assembly and replacement. The central axis of the heat-resistant shell 4 coincides with the symmetry line of the installation position of the two conductive sheets 13 in the heat-resistant shell 4.

[0059] The silk powder composite additive manufacturing device also includes a conductive mechanism, which includes a fixed part 51 and a rotating part 52 with conductive ability.

[0060] The first end of the fixing member 51 is fixed to the outer wall of the conductive nozzle 12, and the rotating member 52 is rotatably arranged at the second end of the fixing member 51. One of the conductive sheets 13 is connected to the fixing member 51, so that the conductive mechanism is electrically connected to the conductive nozzle 12 and one of the conductive sheets 13 respectively.

[0061] The conductive mechanism is used to realize the electrical connection between the wire 11 and the conductive nozzle 12. Figure 2 or Figure 3As shown, the fixing member 51 is fixedly mounted on the outer wall of the conductive nozzle 12, the rotating member 52 is spherical or quasi-spherical, the central axis of the rotating member 52 is perpendicular to the surface of the fixing member 51, and the rotating member 52 can rotate around its own central axis, so that the conductive sheet 13 connected to the rotating member 52 can rotate with the rotating member 52 as a fulcrum to achieve an opening or closing action.

[0062] By setting up the conductive mechanism, on the one hand, the current is made to flow through the conductive nozzle 12, the fixed part 51, the rotating part 52, the conductive sheet 13, the conductive contact 131 and the wire 11 in sequence, thereby realizing the electrical connection between the wire 11 and the conductive nozzle 12; on the other hand, the flexible movement of the conductive sheet 13 connected to the rotating part 52 is ensured, ensuring that the conductive sheet 13 can complete the opening or closing action.

[0063] It should be noted that the conductive mechanism is mechanically connected to only one of the conductive sheets 13, so only the conductive sheet 13 connected to the rotating member 52 can be electrically connected to the conductive nozzle 12, while the other conductive sheet 13 is not electrically connected to the conductive nozzle 12. This arrangement prevents the detection component 3 from failing to detect the voltage when the conductive contact 131 contacts the neck portion 112 or the spherical portion 111.

[0064] Furthermore, if Figure 2 and Figure 3 As shown, the silk powder composite additive manufacturing device also includes a wire 6, a micro power source 7 and a protective resistor 8. The wire 6, the micro power source 7 and the protective resistor 8 are arranged in a heat-resistant shell 4. The micro power source 7, the protective resistor 8, the detection component 3 and the conductive sheet 13 are electrically connected through the wire 6 to form a closed loop.

[0065] The micro power source 7 is provided to provide power for the detection component 3 , and the protection resistor 8 is provided to protect the detection component 3 , thereby ensuring the normal operation of the detection component 3 .

[0066] like Figure 1 As shown, the powder feeding channel 21 includes a first area 211 and a second area 212 which are interconnected. The powder outlet end of the powder feeding channel 21 is located in the second area 212. The length direction of the first area 211 is parallel to the axial direction of the nozzle 2. The inner diameter of the second area 212 gradually decreases from the direction away from the wire outlet end of the wire feeding mechanism 1 to the direction close to the wire outlet end.

[0067] The first region 211 is located above the second region 212, and the first region 211 is in a straight cylindrical shape, so that the reinforcing phase powder 210 falls quickly. The second region 212 is in a truncated cone cylindrical shape, so that the reinforcing phase powder 210 tilts and flows to a position close to the central axis of the wire 11, so that the reinforcing phase powder 210 is evenly attached to the wire droplet.

[0068] like Figure 4As shown, the present invention further provides a silk powder composite additive manufacturing system, comprising the silk powder composite additive manufacturing device provided by any of the above embodiments, and further comprising a substrate 100, the substrate 100 is arranged below the wire feeding mechanism 1 of the silk powder composite additive manufacturing device, and is spaced apart from the wire feeding mechanism 1. Specifically, the substrate 100 is arranged below the conductive nozzle 12 of the wire feeding mechanism 1.

[0069] Furthermore, the silk powder composite additive manufacturing system further includes a powder feeding drive device 200 and a powder container 300. The powder feeding drive device 200, the powder container 300 and the powder feeding channel 21 of the silk powder composite additive manufacturing device are sequentially connected. Driven by the powder feeding drive device 200, the reinforcing phase powder 210 enters the powder feeding channel 21 from the powder container 300. The powder feeding drive device 200 is connected in communication with the wire feeding mechanism 1 to realize the linkage control of powder feeding and wire feeding, and ensure that the powder feeding and wire feeding are performed synchronously.

[0070] Specifically, a powder flow controller 400 may be provided to regulate the powder feeding speed and flow rate of the reinforcing phase powder 210 .

[0071] An adapter 500 may also be connected to the powder outlet end of the powder container 300 to output multiple paths of enhanced phase powder 210 .

[0072] like Figure 4 As shown, the silk powder composite additive manufacturing system also includes a welding heat source 600, a cooling water tank 700, and a shielding gas container 800 to achieve a complete additive manufacturing process.

[0073] The silk-powder composite additive manufacturing system provided by the present invention increases the conveying area of ​​the reinforcing phase powder 210 and improves the contact area and time of the reinforcing phase powder 210 with the electric arc by arranging the nozzle 2 with a powder feeding channel 21, and the powder feeding channel 21 has an annular cross-section along the radial direction of the nozzle 2, so that the reinforcing phase powder 210 is melted in the electric arc to form liquid particles, which are uniformly adsorbed on the surface of the wire droplet and enter the molten pool with the droplet, thereby improving the uniformity of the fusion of the reinforcing phase powder 210 and the wire 11, preventing the occurrence of enrichment areas inside the additive parts due to uneven powder feeding, and avoiding affecting the performance of the additive parts.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A silk powder composite additive manufacturing device, It is characterized in that include: A wire feeding mechanism, equipped with wire material; A nozzle, wherein the nozzle is provided with a powder feeding channel, the cross section of the powder feeding channel along the radial direction of the nozzle is annular, the powder feeding channel is used to transport the reinforcing phase powder, and the powder outlet end of the powder feeding channel faces the wire outlet end of the wire feeding mechanism, so that the movement direction of the reinforcing phase powder is close to the wire material; The nozzle is arranged at the periphery of the wire feeding mechanism; The wire material comprises a plurality of spherical parts and a plurality of constricted parts, the outer diameter of the spherical parts is greater than the outer diameter of the constricted parts, and the spherical parts and the constricted parts are alternately distributed and coaxially arranged; The wire feeding mechanism comprises a conductive nozzle, the conductive nozzle is equipped with two conductive sheets, the two conductive sheets are arranged opposite to each other, the conductive sheets are movably connected to the conductive nozzle, the ends of the conductive sheets have conductive contacts, the conductive contacts of the two conductive sheets are clamped at both sides of the wire material and are always in contact with the wire material; The silk powder composite additive manufacturing device also includes a pulse power supply, which is electrically connected to the conductive sheet. When the conductive contact is in contact with the neck portion, the pulse power supply applies a strong pulse current to the conductive sheet to cause the wire to fuse at the neck portion; when the conductive contact is in contact with the spherical portion, the pulse power supply applies a base current.

2. The silk powder composite additive manufacturing device according to claim 1, It is characterized in that The silk powder composite additive manufacturing device also includes a detection component; The detection component is electrically connected to the conductive contacts and is in communication connection with the pulse power supply. The detection component is used to detect the voltage between the two conductive contacts and send a strong pulse signal to the pulse power supply according to the voltage so that the pulse current applies the strong pulse current.

3. The silk powder composite additive manufacturing device according to claim 2, It is characterized in that When the voltage is less than a preset voltage, the detection component sends the strong pulse signal to the pulse power supply.

4. The silk powder composite additive manufacturing device according to claim 2, It is characterized in that The silk powder composite additive manufacturing device also includes a heat-resistant shell, which is installed on the outer wall of the conductive nozzle, the detection component is arranged in the heat-resistant shell, and one end of the conductive sheet is rotatably installed in the heat-resistant shell.

5. The silk powder composite additive manufacturing device according to claim 4, It is characterized in that The silk powder composite additive manufacturing device also includes a conductive mechanism, which includes a fixed part and a rotating part with conductive ability; The first end of the fixing member is fixed to the outer wall of the conductive nozzle, the rotating member is rotatably arranged at the second end of the fixing member, and one of the conductive sheets is connected to the fixing member so that the conductive mechanism is electrically connected to the conductive nozzle and one of the conductive sheets respectively.

6. The silk powder composite additive manufacturing device according to claim 4, It is characterized in that The silk powder composite additive manufacturing device also includes a wire, a micro power source and a protective resistor. The wire, the micro power source and the protective resistor are arranged in the heat-resistant shell. The micro power source, the protective resistor, the detection component and the conductive sheet are electrically connected through the wire to form a closed loop.

7. The silk powder composite additive manufacturing device according to claim 1, It is characterized in that The powder feeding channel includes a first area and a second area which are interconnected. The powder outlet end of the powder feeding channel is located in the second area. The length direction of the first area is parallel to the axial direction of the nozzle. The inner diameter of the second area gradually decreases from the direction away from the wire outlet end of the wire feeding mechanism to the direction close to the wire outlet end.

8. A silk powder composite additive manufacturing system, It is characterized in that It comprises the silk powder composite additive manufacturing device as described in any one of claims 1 to 7, and also comprises a substrate, wherein the substrate is arranged below the wire feeding mechanism of the silk powder composite additive manufacturing device and is spaced apart from the wire feeding mechanism.

9. The silk powder composite additive manufacturing system according to claim 8, It is characterized in that The silk-powder composite additive manufacturing system further comprises a powder feeding drive device and a powder container, wherein the powder feeding drive device, the powder container and a powder feeding channel of the silk-powder composite additive manufacturing device are sequentially connected, and under the drive of the powder feeding drive device, the reinforcing phase powder enters the powder feeding channel from the powder container; The powder feeding drive device is communicatively connected with the wire feeding mechanism to realize linkage control of powder feeding and wire feeding.

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