A yard smelting and multi-melting point frit additive manufacturing apparatus and method of use thereof

Abstract

The present application relates to the technical field of fuse additive manufacturing, in particular to a stockyard smelting and multi-melting-point fuse additive manufacturing device and a use method thereof, the device comprising a crucible smelting assembly for melting high-melting-point metal powder into a high-melting-point metal powder solution; a heating device assembly for heating the high-melting-point metal powder and preventing solidification; and an additive raw material assembly for storing various high-melting-point metal powders. The specific steps of the use method are as follows: S1, powdering; S2, melting; S3, pushing; S4, heating; S5, mixing solution; S6, feeding welding wire B; and S7, mixing. The high-melting-point metal solution melted by induction heating provides heat to melt low-melting-point welding wire, and there is no phenomenon of evaporation of low-melting-point material or unsolubilization of high-melting-point material, so that a multi-component molten pool with complete and uniform melting is obtained.

Description

Technical Field

[0001] This invention relates to the field of fused wire additive manufacturing technology, specifically to a stockpile melting and multi-melting-point fused wire additive manufacturing apparatus and its usage method. Background Technology

[0002] Fused wire additive manufacturing (FFM) technology has the capability to produce metal parts close to their final shape, enabling the manufacture of difficult-to-machine metals. It offers advantages such as flexibility, short manufacturing cycles, high material utilization, and low cost, providing significant advantages over traditional manufacturing technologies. FFM can balance forming quality, processing efficiency, and processing cost. Furthermore, research on FFM is actively pursued both domestically and internationally, indicating immense research value and development potential. Functional multi-component materials, as advanced materials driven by function and performance, break down the previously coupled material properties, allowing for the individual improvement of one or more properties. This enables key components to have different functions and performances in different locations, demonstrating strong development potential. Existing FFM FFM methods for functional multi-component materials adjust performance by changing the wire composition or adjusting the wire feed rate. However, functional multi-component materials contain multiple material components. When the melting point temperatures of the various component welding wires differ significantly, the following problems arise:

[0003] When a high-energy heat source is used, low-melting-point materials will evaporate violently due to being in the high-temperature area of ​​the heat source for a long time, resulting in a significant difference from the expected mixture composition.

[0004] When a low-energy heat source is used, high-melting-point materials may not reach their melting point due to insufficient heating, resulting in a large amount of unmelted high-melting-point material in the molten pool.

[0005] Therefore, there is an urgent need to develop a method for additive manufacturing of functional multi-component materials with large differences in melting point temperature that can simultaneously melt multiple components. This paper discloses a stockpile melting and multi-melting-point filament additive manufacturing apparatus and method. Summary of the Invention

[0006] To address the aforementioned problems, this invention proposes a stockpile smelting and multi-melting-point filament additive manufacturing apparatus and its usage method.

[0007] A stockpile smelting and multi-melting-point filament additive manufacturing apparatus, comprising:

[0008] A crucible melting assembly used to melt high-melting-point metal powder into a high-melting-point metal powder solution;

[0009] Heating device assembly for heating high-melting-point metal powder and preventing solidification;

[0010] Additive material components are used to store various high-melting-point metal powders.

[0011] Furthermore, the crucible melting assembly includes a crucible, a booster that works with the crucible to provide thrust, a flow rate switch for controlling the flow rate of the high-melting-point metal powder solution in the crucible, a lower channel for introducing two types of welding wires, a metal powder inlet for adding high-melting-point metal powder, and a mixed metal solution outlet for discharging the mixed metal solution flow.

[0012] Furthermore, the crucible is made of high-melting-point ceramic material with a melting temperature of over 2500°C. It has a hollow, thin-walled structure and is used to store molten high-melting-point metal powder solution.

[0013] Furthermore, the heating device assembly includes an induction coil A surrounding the outside of the crucible and an induction coil B surrounding the outside of the lower channel.

[0014] Furthermore, the induction coil A is used to provide heat to heat and melt the high-melting-point metal powder in the crucible; the induction coil B is used to keep the mixed metal solution in the lower channel warm and prevent the mixed metal solution from solidifying.

[0015] Furthermore, the additive manufacturing material components include welding wire A, welding wire B, high melting point metal powder, molten metal fluid, two-component mixed molten metal fluid, and three-component mixed molten metal fluid.

[0016] Furthermore, the melting point of welding wire A6 is lower than that of high-melting-point metal powder; the melting point of welding wire B is lower than that of welding wire A.

[0017] As another improvement to the present invention, a method for using a stockpile smelting and multi-melting-point filament additive manufacturing apparatus is proposed, the specific steps of which are as follows:

[0018] S1. Adding powder: Add high melting point metal powder into the crucible through the metal powder inlet, and then close the metal powder inlet;

[0019] S2. Melting: Turn on the induction coil A switch to heat the high melting point metal powder in the melting crucible and melt it into a molten metal fluid;

[0020] S3, Push: Turn on the flow rate switch, and at the same time the booster provides downward thrust to push the molten metal fluid in the crucible to the lower channel;

[0021] S4. Heating: Turn on induction coil B to heat the lower channel and prevent the molten metal fluid inside from solidifying;

[0022] S5. Mixed solution: Welding wire A is fed in. When welding wire A comes into contact with the molten metal fluid, the molten metal fluid provides heat to melt welding wire A, forming a two-component mixed molten metal fluid;

[0023] S6. Feeding welding wire B: When welding wire B comes into contact with the two-component mixed molten metal fluid, the heat provided by the two-component mixed molten metal fluid melts the welding wire B, forming a three-component mixed molten metal fluid.

[0024] S7. Mixing: The three-component mixed molten metal fluid flows out from the mixed metal solution outlet, and the three-component mixed molten metal fluid accumulates to form a multi-component gradient material.

[0025] In step S5, during the process of the molten metal fluid providing heat to melt the welding wire A, the feeding speed of the welding wire A can be changed to control the composition of the welding wire A.

[0026] The step S described above, in which the heat provided by the two-component mixed molten metal fluid melts the welding wire B, can change the wire feeding speed of the welding wire B and control the composition of the welding wire B.

[0027] The beneficial effects of this invention are: This invention uses a high-melting-point metal solution melted by induction heating to provide heat to melt a low-melting-point welding wire, which avoids the phenomenon of low-melting-point material evaporation or high-melting-point material not melting, and obtains a multi-component molten pool with complete composition and uniform melting. Attached Figure Description

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0029] Figure 1 This is a schematic diagram of crucible melting and filament additive manufacturing provided in a specific embodiment of the present invention;

[0030] Figure 2 This is a general cross-sectional view of crucible melting and filament additive manufacturing provided in a specific embodiment of the present invention;

[0031] Figure 3 This is a schematic diagram of crucible melting of high-melting-point metal powder and welding wire provided in a specific embodiment of the present invention;

[0032] Figure 4 A flow chart of crucible melting and filament additive manufacturing provided in a specific embodiment of the present invention;

[0033] Reference numerals: 1. Crucible; 2. Booster; 3. Induction coil A; 4. Flow rate switch; 5. Lower channel; 6. Welding wire A; 7. Welding wire B; 8. Induction coil B; 9. Metal powder inlet; 10. Mixed metal solution outlet; 11. High melting point metal powder; 12. Molten metal fluid; 13. Two-component mixed molten metal fluid; 14. Three-component mixed molten metal fluid. Detailed Implementation

[0034] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below.

[0035] like Figures 1 to 4 As shown, a stockpile smelting and multi-melting-point filament additive manufacturing apparatus includes:

[0036] A crucible melting assembly used to melt high-melting-point metal powder into a high-melting-point metal powder solution;

[0037] Heating device assembly for heating high-melting-point metal powder and preventing solidification;

[0038] Additive material components are used to store various high-melting-point metal powders.

[0039] The crucible melting assembly includes a crucible 1, a booster 2 that works with the crucible 1 to provide thrust, a flow rate switch 4 for controlling the flow rate of the high melting point metal powder solution in the crucible 1, a lower channel 5 for introducing two types of welding wires, a metal powder inlet 9 for adding high melting point metal powder, and a mixed metal solution outlet 10 for discharging the mixed metal solution.

[0040] Induction coils A3 and B8 are used to provide heat to melt high-melting-point metal powder, causing it to melt into a molten metal fluid.

[0041] When the molten metal flows downward, welding wire A6 is introduced, so that the molten metal comes into contact with welding wire A. The molten metal provides heat to melt welding wire A6, forming a two-component mixed molten metal fluid.

[0042] When the two-component mixed molten metal fluid flows downward, welding wire B7 is introduced, so that the two-component mixed molten metal fluid comes into contact with welding wire B7. The heat provided by the two-component mixed molten metal fluid melts welding wire B7, forming a three-component mixed molten metal fluid.

[0043] The crucible 1 is made of high-melting-point ceramic material with a melting temperature of over 2500℃. It has a hollow, thin-walled structure and is used to store molten high-melting-point metal powder solution.

[0044] The high-melting-point metal solution melted by induction heating provides heat to melt the low-melting-point welding wire, eliminating the evaporation of low-melting-point materials or the stagnation of high-melting-point materials, and resulting in a multi-component molten pool with complete and uniform composition.

[0045] The heating device assembly includes an induction coil A3 surrounding the outside of the crucible 1 and an induction coil B8 surrounding the outside of the lower channel 5.

[0046] The induction coil A3 is used to provide heat to heat and melt the high-melting-point metal powder in the crucible 1; the induction coil B8 is used to keep the mixed metal solution in the lower channel 5 warm and prevent the mixed metal solution from solidifying.

[0047] The additive manufacturing material components include welding wire A6, welding wire B7, high melting point metal powder 11, molten metal fluid 12, two-component mixed molten metal fluid 13, and three-component mixed molten metal fluid 14.

[0048] The melting temperature of welding wire A6 is lower than that of high-melting-point metal powder 11.

[0049] The melting temperature of welding wire B7 is lower than that of welding wire A6.

[0050] This method utilizes induction heating to melt high-melting-point metal molten metal, providing heat to melt low-melting-point welding wire. This solves the problems encountered when heating multi-component welding wires with the same heat source. When using a high-energy heat source, the low-melting-point material evaporates rapidly due to prolonged exposure to the high-temperature region, resulting in a significant difference from the intended mixture composition. Conversely, when using a low-energy heat source, the high-melting-point material fails to reach its melting point due to insufficient heating, leading to a large amount of unmelted high-melting-point material in the molten pool.

[0051] The melting point of welding wire A6 is lower than that of high-melting-point metal powder; the melting point of welding wire B7 is lower than that of welding wire A6. A method for using a stockpile smelting and multi-melting-point wire additive manufacturing apparatus, the specific steps of which are as follows:

[0052] S1. Adding powder: Add high melting point metal powder 11 into crucible 1 through the metal powder inlet, and then close the metal powder inlet 9.

[0053] S2. Melting: Turn on the induction coil A3 switch to heat the high melting point metal powder 11 in the melting crucible 1, so that it melts into molten metal fluid 12;

[0054] S3, Push: Turn on the flow rate switch 4, and at the same time, the booster 2 provides a downward thrust to push the molten metal fluid 12 in the crucible 1 to the lower channel 5;

[0055] S4. Heating: Turn on the induction coil B8 to heat the lower channel 5 and prevent the molten metal fluid 12 inside from solidifying.

[0056] S5, Mixed solution: Welding wire A6 is fed in. When welding wire A6 comes into contact with molten metal fluid 12, the molten metal fluid 12 provides heat to melt welding wire A6, forming a two-component mixed molten metal fluid 13;

[0057] S6. Feeding welding wire B7: When welding wire B7 comes into contact with the two-component mixed molten metal fluid 13, the heat provided by the two-component mixed molten metal fluid melts the welding wire B7, forming a three-component mixed molten metal fluid 14.

[0058] S7. Mixing: The three-component mixed molten metal fluid flows out from the mixed metal solution outlet 10, and the three-component mixed molten metal fluid accumulates to form a multi-component gradient material.

[0059] In step S5, during the process of the molten metal fluid 12 providing heat to melt the welding wire A6, the feeding speed of the welding wire A6 can be changed to control the composition of the welding wire A6.

[0060] The process of melting the welding wire B7 by providing heat in the bicomponent mixed molten metal fluid in step S6 can change the wire feeding speed of the welding wire B7 and control the composition of the welding wire B7.

[0061] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely prisms of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A stockyard smelting and multi-melting point frit additive manufacturing apparatus, characterized by: The application relates to a high-melting-point metal powder additive manufacturing device. The device comprises a crucible melting assembly for melting high-melting-point metal powder into a high-melting-point metal powder solution; a heating device assembly for heating the high-melting-point metal powder and preventing solidification; and an additive raw material assembly for storing multiple high-melting-point metal powders. The crucible melting assembly comprises a crucible (1), a booster (2) matched with the crucible (1) for providing a pushing force, a flow rate switch (4) for controlling the flow rate of the high-melting-point metal powder solution in the crucible (1), a lower passage (5) for feeding two kinds of welding wires, a metal powder feeding port (9) for feeding high-melting-point metal powder, and a mixed metal solution flow outlet (10) for flowing out the mixed metal solution flow; the crucible (1) is made of high-melting-point ceramic material, has a melting temperature of above 2500 DEG C, and has a hollow thin-wall structure; the heating device assembly comprises an induction coil A (3) surrounding the outside of the crucible (1) and an induction coil B (8) surrounding the outside of the lower passage (5); the induction coil A (3) is used for providing heat to melt the high-melting-point metal powder in the crucible (1); the induction coil B (8) is used for keeping the mixed metal solution in the lower passage (5) warm; and the additive raw material assembly comprises welding wire A (6), welding wire B (7), high-melting-point metal powder (11), molten metal fluid (12), double-component mixed molten metal fluid (13), and three-component mixed molten metal fluid (14). The melting point of the welding wire A (6) is lower than that of the high-melting-point metal powder; and the melting point of the welding wire B (7) is lower than that of the welding wire A (6). The specific steps are as follows:

2. A yard smelting and multi-melting point fuse additive manufacturing device according to claim 1, characterized in that: S1, powder feeding: feeding the high-melting-point metal powder (11) into the crucible (1) from the metal powder feeding port, and then closing the metal powder feeding port (9); 3. A method of using a yard smelting and multi-melting point fuse filament additive manufacturing apparatus according to any one of claims 1 to 2, characterized in that: S2, melting: opening the induction coil A (3) switch, heating and melting the high-melting-point metal powder (11) in the crucible (1) into the molten metal fluid (12); S3, pushing: opening the flow rate switch (4), and simultaneously providing a downward pushing force by the booster (2) to push the molten metal fluid (12) in the crucible (1) to the lower passage (5); S4, heating: opening the induction coil B (8) to heat the lower passage (5) and prevent the molten metal fluid (12) in the lower passage (5) from solidifying; S5, mixed solution: feeding the welding wire A (6), when the welding wire A (6) contacts the molten metal fluid (12), melting the welding wire A (6) by the heat provided by the molten metal fluid (12) to form the double-component mixed molten metal fluid (13); S6, feeding the welding wire B (7): when the welding wire B (7) contacts the double-component mixed molten metal fluid (13), melting the welding wire B (7) by the heat provided by the double-component mixed molten metal fluid to form the three-component mixed molten metal fluid (14); S7, mixing: the three-component mixed molten metal fluid flows out from the mixed metal solution flow outlet (10), and the three-component mixed molten metal fluid is accumulated to form a multi-component gradient material. In the process of melting the welding wire A (6) by the heat provided by the molten metal fluid (12), the feeding speed of the welding wire A (6) can be changed to control the component of the welding wire A (6). ​ 4. A method of using a yard smelting and multi-melting point fuse additive manufacturing apparatus as claimed in claim 3, characterized in that: ​ 5. A method of using a yard smelting and multi-melting point fuse additive manufacturing device according to claim 3, characterized in that: The step S6 can change the wire feeding speed of the welding wire B (7) to control the components of the welding wire B (7) in the process of providing heat to the two-component mixed molten metal fluid to melt the welding wire B (7).

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