CN-116511543-B - Silk powder isomerism electromagnetic jet additive manufacturing device and method

CN116511543BCN 116511543 BCN116511543 BCN 116511543BCN-116511543-B

Abstract

The invention discloses a silk powder isomerism electromagnetic spray additive manufacturing device and method, and belongs to the technical field of material surface spraying. The stirring needle comprises a shell, a stirring needle, a needle sleeve, a guide wire shaft, a wire feeding assembly and two metal wires, wherein the lower end of the stirring needle is provided with a powder outlet and a gas-powder channel matched with the powder outlet, the needle sleeve is fixedly arranged in the shell, the lower end of the needle sleeve penetrates through the shell and is provided with a first wire spraying opening, the guide wire shaft is fixedly arranged in the shell, the lower end of the guide wire shaft penetrates through the shell and is provided with a second wire spraying opening, the wire feeding assembly is fixedly arranged on the shell, and the two metal wires arranged in the wire feeding assembly are respectively externally connected with the anode and the cathode of a power supply. When the two metal wires penetrate out of the shell and are contacted with each other to generate a short circuit, electric arcs are generated between the two metal wires due to high current density, the end parts of the two metal wires are melted simultaneously, particles generated by melting are wrapped on the metal powder to form a core-shell structure material, and the metal powder and the substrate material are promoted to form firmer combination.

Inventors

CHEN YUHUA
LUO KAIYU
ZHANG TIMING
HU JINYANG
YIN LIMENG
WANG SHANLIN

Assignees

南昌航空大学

Dates

Publication Date: 20260508
Application Date: 20230412

Claims (4)

1. The utility model provides a silk powder isomerism electromagnetism sprays additive manufacturing installation, includes casing (1) and stirring needle (2), the lower extreme of stirring needle (2) is provided with out powder mouth (201) and with gas powder passageway (13) of this play powder mouth (201) looks adaptation, its characterized in that still includes: The needle sleeve (3) is fixedly arranged in the shell (1), and the lower end of the needle sleeve (3) penetrates out of the shell (1) and is provided with a first spinning nozzle (301); the guide wire shaft (4) is fixedly arranged in the shell (1), and the lower end of the guide wire shaft (4) penetrates out of the shell (1) and is provided with a second wire spraying port (401); The wire feeding assembly is fixedly arranged on the shell (1), two wires (6) arranged in the wire feeding assembly are respectively externally connected with the anode and the cathode of a power supply, and one ends of the two wires (6) far away from the power supply penetrate out of the shell (1) and respectively enter the needle sleeve (3) and the wire guide shaft (4); the stirring needle (2) is rotatably arranged in the needle sleeve (3) through a sealing bearing; a driven gear (14) is fixedly arranged on the stirring pin (2), a driving motor (15) is fixedly arranged on the pin sleeve (3), a driving gear (16) is fixedly arranged at the output end of the driving motor (15), and the driving gear (16) is in meshed connection with the driven gear (14); the wire feeding assembly comprises a U-shaped supporting seat (7) fixedly arranged on a shell (1), a connecting shaft (8) is rotatably arranged in an opening of the U-shaped supporting seat (7), a wire disc (9) is fixedly arranged on the connecting shaft (8), and the metal wire (6) is wound on the wire disc (9); The gear motor (10) is fixedly arranged on the shell (1), a notch gear (11) is fixedly arranged at the output end of the gear motor (10), and a connecting gear (12) meshed with the notch gear (11) is fixedly arranged on the connecting shaft (8); The device also comprises a guide wire nozzle (30) which is slidably arranged in the needle sleeve (3) and the guide wire shaft (4), wherein springs (33) are fixedly connected between the guide wire nozzle (30) and the inner walls of the needle sleeve (3) and the guide wire shaft (4); The heating device further comprises a second mounting seat (24) fixedly mounted in the shell (1), a heating coil (25) is fixedly mounted in the second mounting seat (24), an alternating current power supply box (26) is fixedly mounted on the shell (1), and the heating coil (25) is connected with the alternating current power supply box (26) through a wire; The yarn cutting device further comprises a fly plate (5) which is arranged on the needle sleeve (3) and the yarn guiding shaft (4) in a sliding manner, wherein a yarn cutting blade (27) is fixedly arranged in the fly plate (5), a wedge block (31) is fixedly arranged on the yarn cutting blade (27), the wedge block (31) is contacted with the yarn guiding nozzle (30), and a driving component for pushing the fly plate (5) to slide at a high speed is fixedly arranged in the shell (1); The driving assembly comprises a plurality of metal rods (17) which are slidably arranged in a shell (1), wherein the lower ends of the metal rods (17) penetrate out of the shell (1) and are fixedly connected with a fly plate (5), electromagnetic coils (18) are sleeved on the metal rods (17), first mounting seats (19) are fixedly arranged in the shell (1), limiting sleeves (1901) are arranged on the first mounting seats (19) along the circumference at equal intervals, and metal wires connected between adjacent electromagnetic coils (18) are fixed in the limiting sleeves (1901).
2. The silk powder isomerism electromagnetic spray additive manufacturing device according to claim 1, further comprising a joint plate (20) fixedly installed at the upper end of the metal rod (17), wherein an air bag (21) is fixedly installed between the joint plate (20) and the shell (1), a corrugated pipe (22) is fixedly installed in the air bag (21), the lower end of the corrugated pipe (22) penetrates out of the shell (1) and is installed in the metal rod (17), and an air tap (23) connected with the corrugated pipe (22) is fixedly installed at the lower end of the metal rod (17).
3. The silk powder isomerism electromagnetic spray additive manufacturing device according to claim 2, further comprising a top plate (32) fixedly arranged on the stirring pin (2), wherein a plurality of wedge-shaped plates (28) are fixedly arranged below the top plate (32); A groove (2401) is formed in the second mounting seat (24), a connecting rod (29) is elastically connected in the groove (2401), and two ends of the connecting rod (29) are respectively contacted with the wedge-shaped plate (28) and the connecting plate (20).
4. A method for manufacturing silk powder isomerism electromagnetic spray additive, which adopts the silk powder isomerism electromagnetic spray additive manufacturing device as claimed in any one of claims 1-3, and is characterized by comprising the following operation steps: Step1, wire materials and metal powder are sent out to a substrate through a discharge hole; Step 2, wire material is subjected to electric explosion and metal powder to form a core-shell structure; Step 3, the fly plate (5) is impacted at a high speed to drive the metallurgical bonding between the core-shell structure material and the substrate; And 4, performing friction stir movement on the stirring pin (2) to generate large plastic deformation.

Description

Silk powder isomerism electromagnetic jet additive manufacturing device and method Technical Field The invention relates to the technical field of material surface spraying, in particular to a device and a method for manufacturing silk powder isomerism electromagnetic spraying additive. Background Surface spraying is a technology for strengthening and protecting the surface of a workpiece, and the currently commonly used surface spraying processing technology is mainly divided into a hot spraying technology and a cold spraying technology. The thermal spraying technology is that the thermal spraying material is melted by heat energy, atomized by high-speed airflow, and condensed to form a coating with certain function after being impacted on the surface of a base material under the drive of the high-speed airflow, and the cold spraying technology is a material deposition technology based on aerodynamic principle, which is that solid particles are accelerated by the high-pressure airflow, and when the particle speed exceeds a certain critical value, the particles impact on the base body at high speed to generate severe plastic deformation and form mechanical combination with the base body. Surface spray processing techniques typically achieve surface coatings ranging from tens of microns to millimeters in thickness. Therefore, the material surface spraying technology is widely applied to the fields of aviation, aerospace, automobiles, sports life, mechanical manufacturing and the like. However, in both the hot spraying technique and the cold spraying technique, after the metal coating is sprayed on the surface of the substrate to form a coating, innumerable deformed particles are stacked together in a wave shape in a staggered manner, and voids or cavities are easily generated in the metal coating, so that the bonding firmness between the metal coating and the surface of the substrate is poor. Disclosure of Invention The invention aims to solve the problems that after a metal coating is sprayed on the surface of a substrate to form a coating, innumerable deformed particles are mutually staggered and stacked together in a wave shape, pores or cavities are easy to generate in the metal coating, and the bonding firmness between the metal coating and the surface of the substrate is poor in the prior art, and provides a silk powder isomerism electromagnetic spraying additive manufacturing device and a silk powder isomerism electromagnetic spraying additive manufacturing method. In order to achieve the above purpose, the present invention adopts the following technical scheme: The silk powder isomerism electromagnetism sprays material increase manufacturing installation, including casing and stirring needle, the lower extreme of stirring needle is provided with the powder mouth and with the gas powder passageway of this powder mouth looks adaptation, still includes the needle cover of fixed mounting in the casing, the lower extreme of needle cover runs through the casing and has seted up first silk mouth, the seal wire axle of fixed mounting in the casing, the lower extreme of seal wire axle runs through the casing and has seted up the second silk mouth, the silk subassembly of sending of fixed mounting on the casing, two wires that send and be equipped with in the silk subassembly external positive and negative pole that have the power respectively, two the one end that the wire kept away from the power runs through the casing and gets into needle cover and seal wire axle respectively. In order to output the metal powder, preferably, the stirring pin is rotatably arranged in the pin sleeve through a sealing bearing, a driven gear is fixedly arranged on the stirring pin, a driving motor is fixedly arranged on the pin sleeve, a driving gear is fixedly arranged at the output end of the driving motor, and the driving gear is in meshed connection with the driven gear. In order to output the metal wire, the wire feeding assembly preferably comprises a U-shaped supporting seat fixedly arranged on the shell, a connecting shaft is rotatably arranged in an opening of the U-shaped supporting seat, a wire tray is fixedly arranged on the connecting shaft, the metal wire is wound on the wire tray, a gear motor is fixedly arranged on the shell, a notch gear is fixedly arranged at the output end of the gear motor, and a connecting gear meshed with the notch gear is fixedly arranged on the connecting shaft. In order to enable the two metal wires with different polarities to be close to each other to generate an electric arc, the electric arc generating device preferably further comprises a wire guide nozzle which is slidably arranged in the needle sleeve and the wire guide shaft, and springs are fixedly connected between the wire guide nozzle and the inner walls of the needle sleeve and the wire guide shaft. In order to heat the metal powder, the metal powder heating device preferably further comprises a second installation seat f