Ultrasonic rolling synchronous auxiliary fuse arc additive manufacturing device

Abstract

The utility model discloses an ultrasonic rolling synchronous auxiliary fuse arc additive manufacturing device which comprises a substrate, an ultrasonic rolling assembly and a welding assembly, the ultrasonic rolling assembly and the welding assembly are arranged above the substrate, and the ultrasonic rolling assembly is connected with the welding assembly. The ultrasonic rolling assembly comprises an ultrasonic generator and an ultrasonic rolling device connected with the ultrasonic generator; the ultrasonic rolling device comprises compressed gas, an ultrasonic transducer, a rotating mechanism, an ultrasonic amplitude-change pole, a connecting rod and a roller working head; the ultrasonic transducer penetrates through the rotating mechanism, compressed gas is arranged at the upper end of the ultrasonic transducer, the lower end of the ultrasonic transducer is connected with one end of the ultrasonic amplitude-change pole, the other end of the ultrasonic amplitude-change pole is connected with one end of the connecting rod, and the other end of the connecting rod is connected with the roller working head. According to the device, high-frequency mechanical vibration is applied to the roller working head through the ultrasonic rolling assembly, internal beta columnar crystals are broken, and high-efficiency, low-cost and high-quality additive manufacturing is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of metal fuse printing, especially to a device for ultrasonic rolling synchronous auxiliary fuse electric arc additive manufacturing. BACKGROUND

[0002] Titanium alloy has been widely used in aerospace, medical treatment, ship and other fields due to its light weight, high specific strength, corrosion resistance and other excellent comprehensive performance. These performances also correspondingly increase the difficulty of titanium alloy processing, and it is difficult to prepare large and complex structural parts.

[0003] With the rise of fuse printing technology, these performances show great advantages in titanium alloy processing, greatly improving the forming efficiency of large titanium alloy parts and the utilization rate of materials. The arc fuse additive manufacturing technology (WAAM) has been widely used in the field of titanium alloy fuse additive manufacturing due to its low equipment price, simple operation, high forming efficiency and strong forming capacity. The technology uses the way of layer-by-layer surfacing to manufacture dense metal solid components. Since the electric arc is used as an energy beam, it has the characteristics of high heat input and rapid forming, and is particularly suitable for low-cost, efficient and rapid near-net shaping of large-size complex components.

[0004] The electric arc additive manufacturing technology shows its unique advantages in the manufacturing cost and reliability requirements of special metal structures, especially in the forming of large-size structural parts, which has incomparable efficiency and cost advantages compared with other additive technologies. Compared with laser additive manufacturing technology, the electric arc fuse additive manufacturing is not sensitive to metal materials, and can form more materials.

[0005] However, titanium alloy parts produced by fuse additive manufacturing generally have coarse epitaxial growth beta columnar crystals, which leads to anisotropy of microstructure and mechanical properties in the wire feeding direction and the accumulation direction. In order to optimize the microstructure of the additive manufactured parts and reduce anisotropy, some researches have been carried out by combining additive manufacturing with post-heat treatment to obtain equiaxed crystals. Although these methods can effectively refine the structure, the forming efficiency is not high. UTILITY MODEL CONTENT

[0006] The utility model aims at providing a device for ultrasonic rolling synchronous auxiliary fuse electric arc additive manufacturing, which effectively breaks the internal beta columnar crystals generated along the accumulation direction by synchronously applying high-frequency mechanical vibration during the additive manufacturing process, improves the internal organization state, and reduces defects such as pores between the cladding layers.

[0007] To solve the above technical problems, the utility model provides a kind of device of ultrasonic roll pressing synchronous auxiliary fuse electric arc additive manufacturing, including substrate, ultrasonic roll pressing component and welding assembly being arranged above the substrate, the ultrasonic roll pressing component is connected with the welding assembly, and the ultrasonic roll pressing component is used to break the internal beta columnar crystal generated along the accumulation direction;

[0008] The ultrasonic roll pressing component includes an ultrasonic generator and an ultrasonic roll pressing device connected to the ultrasonic generator.

[0009] The ultrasonic roll pressing device includes compressed gas, an ultrasonic transducer, a rotating mechanism, an ultrasonic amplitude rod, a connecting rod, and a roller working head. The ultrasonic transducer passes through the rotating mechanism. The upper end of the ultrasonic transducer is provided with the compressed gas. The lower end of the ultrasonic transducer is connected to one end of the ultrasonic amplitude rod. The other end of the ultrasonic amplitude rod is connected to one end of the connecting rod. The other end of the connecting rod is connected to the roller working head.

[0010] Further, the welding assembly includes a fixed rod, a welding gun, and a fixed buckle. The fixed buckle is connected to the fixed rod. The welding gun is vertically fixed through the fixed buckle.

[0011] Further, the fixed rod includes a first fixed rod and a second fixed rod. The first fixed rod and the second fixed rod are arranged in the same height and parallel. Adjacent ends are provided with fixed holes. The two ends of the fixed buckle are installed on the fixed holes.

[0012] Further, the welding gun includes a tungsten electrode and an argon atmosphere. The tungsten electrode is located in the middle of the welding gun. The argon atmosphere surrounds the tungsten electrode in the welding gun.

[0013] Further, the welding assembly further includes a wire roll and a wire feeder. The wire roll is connected to the wire feeder.

[0014] Further, the welding assembly further includes a sliding block installed on the first fixed rod. The sliding block can slide left and right along the first fixed rod.

[0015] Further, the ultrasonic roll pressing device further includes a support rod. The sliding block is connected to one end of the support rod.

[0016] Further, the rotating mechanism is provided with a connecting hole. The other end of the support rod is installed on the connecting hole of the rotating mechanism through a fixing piece.

[0017] Further, the distance between the roller working head and the molten pool of the tungsten electrode is 15-20mm.

[0018] Compared with the prior art, the utility model has at least the following beneficial effects:

[0019] The utility model discloses a high frequency mechanical vibration is applied to the roller working head through ultrasonic rolling assembly, and the roller working head transmits static pressure and ultrasonic wave impact vibration to the surface of each cladding layer, makes the cladding layer produce elastic plastic deformation, effectively breaks the internal columnar crystal, improves microstructure, thereby significantly improves the mechanical property of titanium alloy parts, reduces the defect such as porosity, realizes high -efficient, low -cost high -quality additive manufacturing. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 It is the structural schematic diagram of the device of ultrasonic rolling synchronous auxiliary fuse electric arc additive manufacturing in an embodiment of the utility model;

[0021] Fig. 2 It is the structural schematic diagram of the device of ultrasonic rolling synchronous auxiliary fuse electric arc additive manufacturing in an embodiment of the utility model;

[0022] Figure number: 1, base plate;2, print piece;3, ultrasonic generator;4, ultrasonic rolling device;5, fixed link;6, sliding block;7, argon atmosphere;8, tungsten electrode;9, fixed buckle;10, wire roll;11, wire feeder;12, support rod;41, compressed gas;42, ultrasonic transducer;43, rotating mechanism;44, ultrasonic amplitude transformer;45, connecting rod;46, roller working head. DETAILED DESCRIPTION

[0023] The utility model discloses a kind of devices of ultrasonic rolling synchronous auxiliary fuse electric arc additive manufacturing, which will be described in more detail below in conjunction with schematic diagram, in which preferred embodiment of the utility model is shown, it should be understood that the utility model described herein can be modified by those skilled in the art, while still achieving the advantageous effects of the utility model. Therefore, the following description should be understood as extensive knowledge for those skilled in the art, and not as a limitation on the utility model.

[0024] The utility model is described in more detail in the following paragraphs with reference to the drawings. The advantages and features of the utility model will be more apparent according to the following description. It should be noted that the drawings are all very simplified and all use non-precise proportions, only to facilitate, clearly assist the purpose of explaining the embodiment of the utility model.

[0025] As Figs. 1-2 As shown in the utility model embodiment, a kind of device of ultrasonic rolling synchronous auxiliary fuse electric arc additive manufacturing is proposed, including base plate 1, ultrasonic rolling assembly and welding assembly being set above the base plate 1, the ultrasonic rolling assembly is connected with the welding assembly, the ultrasonic rolling assembly is used to apply ultrasonic rolling synchronously in additive manufacturing process, break the internal β columnar crystal generated along the accumulation direction, to improve the microstructure and physical property of cladding layer.

[0026] In the embodiment, the ultrasonic rolling assembly comprises an ultrasonic generator 3 and an ultrasonic rolling device 4 connected with the ultrasonic generator 3. The high-frequency electric signal generated by the ultrasonic generator 3 is converted into mechanical vibration, which is transmitted to the roller working head 46 through the ultrasonic rolling device 4, so as to cause the cladding layer to have elastic-plastic deformation, break the internal β columnar crystal, and thus improve the internal structure and the mechanical properties of the printed part 2.

[0027] Specifically, the ultrasonic rolling device 4 comprises compressed gas 41, an ultrasonic transducer 42, a rotating mechanism 43, an ultrasonic amplitude transformer 44, a connecting rod 45, and a roller working head 46. The ultrasonic transducer 42 passes through the rotating mechanism 43, and the upper end of the ultrasonic transducer 42 is provided with the compressed gas 41. The compressed gas 41 provides static pressure for the ultrasonic rolling device 4 and enhances the rolling effect. The lower end of the ultrasonic transducer 42 is connected with one end of the ultrasonic amplitude transformer 44, the other end of the ultrasonic amplitude transformer 44 is connected with one end of the connecting rod 45, and the other end of the connecting rod 45 is connected with the roller working head 46. The ultrasonic transducer 42 converts the electric signal into mechanical vibration and transmits it to the roller working head 46. The rotating mechanism 43, the ultrasonic amplitude transformer 44, and the connecting rod 45 ensure the effective transmission of vibration energy and improve the rolling efficiency. The roller working head 46 directly acts on the cladding layer, breaks the coarse β columnar crystal growing in the stacking direction in the cladding layer, reduces the anisotropy of the material, and improves the quality of the printed part 2.

[0028] In the embodiment, the welding assembly comprises a fixed rod 5, a welding gun, and a fixed buckle 9. The fixed buckle 9 is connected with the fixed rod 5, and the fixed rod 5 is used for fixing and supporting the welding gun and the ultrasonic rolling device 4, thereby reducing the vibration and deviation in the welding process and improving the welding quality. The welding gun is the core of the welding assembly, which is used for generating an electric arc, melting a metal wire, and forming a dense metal solid member by layer-by-layer surfacing on the base plate 1. The welding gun is vertically fixed through the fixed buckle 9, thereby ensuring the stability and accurate positioning of the welding gun in the welding process.

[0029] In a specific embodiment, the fixed rod 5 comprises a first fixed rod 5 and a second fixed rod 5, which are arranged in the same height and parallel to each other, and each of the adjacent ends is provided with a fixed hole. The two ends of the fixed buckle 9 are installed on the fixed holes. The design of the fixed rod 5 and the fixed buckle 9 facilitates the installation and adjustment of the welding gun, improves the convenience of operation, and also allows the welding assembly to be adjusted in different positions and directions to adapt to different welding requirements and workpiece shapes.

[0030] The welding torch comprises a tungsten electrode 8 located in the middle of the welding torch and an argon atmosphere 7 surrounding the tungsten electrode 8 in the welding torch. The tungsten electrode 8 serves as one pole of the electric arc, generates the electric arc to melt the metal, is a key component in the welding process, and can withstand high temperature without melting due to its high melting point and good electrical conductivity. Argon, as a protective gas, is continuously sprayed from the welding torch to form a protective layer around the electric arc, isolating air and preventing oxidation of the tungsten electrode, the molten pool and the adjacent heat-affected zone. The combination of the tungsten electrode 8 and the argon atmosphere 7 provides a stable electric arc and a good protective environment for the welding process, thereby obtaining a high-quality printed part 2.

[0031] In the present embodiment, the welding assembly further comprises a wire roll 10 and a wire feeder 11, wherein the wire roll 10 is connected to the wire feeder 11 for continuously supplying metal wire to the welding area, maintaining the continuity and stability of the welding process.

[0032] The welding assembly further comprises a sliding block 6 mounted on the first fixed rod 5, which can slide left and right along the first fixed rod 5. The ultrasonic rolling device 4 further comprises a support rod 12, one end of which is connected to the sliding block 6. The rotating mechanism 43 is provided with a connecting hole, and the other end of the support rod 12 is mounted on the connecting hole of the rotating mechanism 43 through a screw. The ultrasonic rolling device 4 adjusts the rolling feed amount between the angle and the tungsten electrode 8 by turning the screw, and controls the relative distance between the ultrasonic rolling device 4 and the molten pool through the sliding block 6, which helps to improve the microstructure of the cladding layer and improve the mechanical properties of the welded joint, while reducing the heat-affected zone, reducing the risk of welding deformation and cracking, thereby improving the welding quality and production efficiency.

[0033] In a preferred embodiment, the distance between the roller working head 46 and the molten pool of the tungsten electrode 8 is 15-20mm, which enables the roller working head 46 to effectively apply ultrasonic vibration to the cladding layer to promote material refinement and microstructure improvement, while avoiding too close to interfere with the molten pool or overheating, and too far to reduce the efficiency of ultrasonic vibration energy transmission, thereby improving the efficiency and reliability of the entire additive manufacturing process.

[0034] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application also intends to include these modifications and variations.

Claims

1. An apparatus for ultrasonic roll-synchronized auxiliary fusion arc additive manufacturing, characterized in that, The application relates to a welding device, which comprises a substrate, an ultrasonic rolling assembly arranged above the substrate and a welding assembly, the ultrasonic rolling assembly is connected with the welding assembly, and the ultrasonic rolling assembly is used for crushing internal beta columnar crystals generated in a stacking direction. The ultrasonic rolling assembly comprises an ultrasonic generator and an ultrasonic rolling device connected with the ultrasonic generator. The ultrasonic rolling device comprises compressed gas, an ultrasonic transducer, a rotating mechanism, an ultrasonic amplitude rod, a connecting rod and a roller working head; the ultrasonic transducer passes through the rotating mechanism, the upper end of the ultrasonic transducer is provided with the compressed gas, the lower end of the ultrasonic transducer is connected with one end of the ultrasonic amplitude rod, the other end of the ultrasonic amplitude rod is connected with one end of the connecting rod, and the other end of the connecting rod is connected with the roller working head.

2. The apparatus of claim 1, wherein, The welding assembly comprises a fixing rod, a welding gun and a fixing buckle, the fixing buckle is connected with the fixing rod, and the welding gun is vertically fixed through the fixing buckle.

3. The apparatus of claim 2, wherein, The fixing rod comprises a first fixing rod and a second fixing rod, the first fixing rod and the second fixing rod are arranged in the same height and in parallel, and adjacent ends are provided with fixing holes, and two ends of the fixing buckle are installed on the fixing holes.

4. The apparatus of claim 2, wherein, The welding gun comprises a tungsten electrode and an argon gas atmosphere, the tungsten electrode is located in the middle of the welding gun, and the argon gas atmosphere surrounds the tungsten electrode in the welding gun.

5. The apparatus of claim 1, wherein, The welding assembly further comprises a wire roll and a wire feeder, and the wire roll is connected with the wire feeder.

6. The apparatus of claim 1, wherein, The welding assembly further comprises a sliding block installed on the first fixing rod, and the sliding block can slide left and right along the first fixing rod.

7. The apparatus of claim 6, wherein, The ultrasonic rolling device further comprises a supporting rod, and one end of the sliding block is connected with the supporting rod.

8. The apparatus of claim 7, wherein, The rotating mechanism is provided with a connecting hole, and the other end of the supporting rod is installed on the connecting hole of the rotating mechanism through a fixing piece.

9. The apparatus of claim 1, wherein, The distance between the roller working head and a molten pool of the tungsten electrode is 15-20 mm.

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