Ultrasonic wire feeding additive manufacturing device

Abstract

The utility model discloses an ultrasonic wire feeding additive manufacturing device which comprises a base plate, a tungsten electrode welding gun, a wire feeder and an ultrasonic vibration system. The tungsten electrode welding gun, the wire feeder and the ultrasonic vibration system are jointly connected with a positioning rod, and the positioning rod is movably arranged above the base plate. The ultrasonic vibration system is located on one side of the wire feeder and used for generating high-frequency vibration signals and transferring the generated high-frequency signals to a welding metal wire. According to the ultrasonic wire feeding additive manufacturing device, ultrasonic vibration is applied to the welding metal wire, so that a high-frequency vibration signal is transmitted into the molten pool through the welding metal wire, cavitation is generated in the molten pool, beta columnar crystals generated in the solidification process can be effectively broken, and the production efficiency is improved. And the anisotropy problem of the internal structure and the mechanical property in the wire feeding direction and the stacking direction is solved, that is, the performance of an additive manufacturing part is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to metal fuse printing technical field especially relates to an ultrasonic wire feeding additive manufacturing device. 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 complex structural parts. With the rise of fuse printing technology, it shows great advantages in titanium alloy processing, improves the forming efficiency of large titanium alloy parts and the utilization rate of materials. The electric arc fuse additive manufacturing technology has low equipment price, simple operation, and better forming efficiency and forming capacity than laser fuse additive manufacturing and electron beam fuse additive manufacturing technology, so it has been widely used in the field of titanium alloy fuse additive manufacturing.

[0003] However, titanium alloy parts prepared by fuse additive manufacturing may have coarse epitaxial growth of beta columnar crystals, which causes anisotropy of microstructure and mechanical properties in the wire feeding direction and the accumulation direction, thereby affecting the performance of the additive manufacturing parts.

[0004] Therefore, the utility model provides an ultrasonic wire feeding additive manufacturing device to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing an ultrasonic wire feeding additive manufacturing device to improve the performance of additive manufacturing parts.

[0006] To solve the above technical problems, the utility model provides an ultrasonic wire feeding additive manufacturing device, which comprises a substrate, a tungsten electrode welding gun, a wire feeder and an ultrasonic vibration system.

[0007] The tungsten electrode welding gun, the wire feeder and the ultrasonic vibration system are jointly connected with a positioning rod, and the positioning rod is movably arranged above the substrate.

[0008] The ultrasonic vibration system is located on one side of the wire feeder and is used to generate a high-frequency vibration signal and transfer the generated high-frequency signal to the welding wire.

[0009] Further, the ultrasonic vibration system comprises a mounting seat, a wire guide pipe and an ultrasonic transducer.

[0010] The mounting seat is mounted on the positioning rod.

[0011] The wire guide pipe is fixed on the mounting seat through a support rod, and an adapter hole is formed in the sidewall of the wire guide pipe.

[0012] The ultrasonic transducer is installed on the mounting seat, and the ultrasonic transducer is connected with an ultrasonic amplitude transformer;

[0013] The ultrasonic amplitude transformer is fixed on the mounting seat, and an output end of the ultrasonic amplitude transformer is located inside the guide wire pipe through the connecting hole.

[0014] Further, the mounting seat is slidingly installed on the positioning rod, and a fixing screw for locking the mounting seat is arranged on the mounting seat.

[0015] Further, a threaded hole is arranged on the mounting seat, and the fixing screw is threadedly installed in the threaded hole, and an end of the fixing screw is in abutment with the positioning rod when the fixing screw is screwed in the threaded hole.

[0016] Further, the support rod is fixedly connected with the guide wire pipe and the mounting seat at two ends respectively.

[0017] Further, argon gas is passed through the tungsten electrode welding gun.

[0018] Compared with the prior art, the ultrasonic wire feeding additive manufacturing device has at least the following beneficial effects:

[0019] The ultrasonic wire feeding additive manufacturing device provided by the present application can effectively break the beta columnar crystals generated in the solidification process by applying ultrasonic vibration to the welding wire, so that the high-frequency vibration signal is transmitted to the molten pool through the welding wire, cavitation is generated in the molten pool, and the mechanical properties of the internal structure, the wire feeding direction and the stacking direction are improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the ultrasonic wire feeding additive manufacturing device of the present application.

[0021] Figure 2 It is a schematic diagram of the installation between the ultrasonic amplitude transformer and the guide wire pipe in the ultrasonic wire feeding additive manufacturing device of the present application.

[0022] In the figure: 1, base plate; 2, tungsten electrode welding gun; 3, wire feeder; 4, ultrasonic vibration system; 41, mounting seat; 411, fixing screw; 42, guide wire pipe; 421, connecting hole; 43, ultrasonic generator; 44, ultrasonic transducer; 45, support rod; 46, ultrasonic amplitude transformer; 5, positioning rod. DETAILED DESCRIPTION

[0023] The ultrasonic wire feeding additive manufacturing device of the present application will be described in more detail below in conjunction with the schematic drawings, wherein the preferred embodiments of the present application are shown, it should be understood that the present application described herein can be modified by those skilled in the art, and still achieve the advantageous effects of the present application. Therefore, the following description should be understood as a broad knowledge for those skilled in the art, and not as a limitation of the present application.

[0024] The present application will be described in more detail below in conjunction with the accompanying drawings, which are merely illustrative and are not drawn to scale. According to the following description and claims, the advantages and features of the present application will be more apparent. It should be noted that the drawings are very simplified and use non-precise proportions, only to facilitate, clear and assist in the purpose of illustrating the embodiments of the present application.

[0025] As shown in Figure 1 The present application proposes an ultrasonic wire feeding additive manufacturing device, comprising a substrate 1, a tungsten electrode welding gun 2, a wire feeder 3 and an ultrasonic vibration system 4, the tungsten electrode welding gun 2, the wire feeder 3 and the ultrasonic vibration system 4 are jointly connected with a positioning rod 5, the positioning rod 5 is movably arranged above the substrate 1, the ultrasonic vibration system 4 is located on one side of the wire feeder 3, for generating high-frequency vibration signals and transferring the generated high-frequency signals to the welding wire.

[0026] In the above embodiment, the positioning rod 5 is installed above the substrate 1 by the three-axis moving platform, the three-axis moving platform drives the tungsten electrode welding gun 2, the wire feeder 3 and the ultrasonic vibration system 4 to move synchronously, at the same time, the welding wire is automatically fed by the wire feeder 3, and the tungsten electrode welding gun 2 is started, so as to realize the formation of additive manufacturing parts on the substrate 1.

[0027] In the wire melting additive manufacturing process, the additive manufacturing part may have coarse epitaxial growth of β columnar crystal, resulting in anisotropy of the microstructure and mechanical properties in the wire feeding direction and the stacking direction, the present embodiment includes an ultrasonic vibration system 4, which can generate high-frequency vibration signals and transfer the generated high-frequency signals to the welding wire during the wire melting additive manufacturing process, the high-frequency vibration signals are transmitted to the molten pool through the welding wire, so as to produce cavitation effect in the molten pool, and further effectively break the β columnar crystal generated in the solidification process, so as to improve the anisotropy problem of the internal structure and the mechanical properties in the wire feeding direction and the stacking direction, that is, the performance of the additive manufacturing part is improved.

[0028] In the implementation process, preferably, the tungsten electrode welding gun 2 is filled with argon, which is a colorless, odorless monatomic gas. Argon is an inert gas that does not react with other substances at room temperature, and does not dissolve in liquid metal at high temperature. It can show its superiority when welding non-ferrous metals. Argon acts as a protective gas during welding, which can prevent the burning of alloy elements and other welding defects caused by the burning of alloy elements, thereby simplifying the metallurgical reaction during welding and making it easy to control to ensure high quality welding.

[0029] In a specific embodiment, the ultrasonic vibration system 4 includes a mounting seat 41, a wire guide tube 42, and an ultrasonic transducer 44, the mounting seat 41 is mounted on the positioning rod 5, the wire guide tube 42 is fixed on the mounting seat 41 through a support rod 45, the support rod 45 is fixedly connected with the wire guide tube 42 and the mounting seat 41 at both ends, the ultrasonic transducer 44 is mounted on the mounting seat 41, and the ultrasonic transducer 43 is connected with an ultrasonic amplitude transformer 46, the ultrasonic amplitude transformer 46 is fixed on the mounting seat 41.

[0030] In combination with reference Figure 2 The wire guide tube 42 has a connecting hole 421 passing through the side wall, the output end of the ultrasonic amplitude transformer 46 passes through the connecting hole 421 and is located inside the wire guide tube 42, a welding wire passes through the wire guide tube 42 and is connected with the wire feeder 3, and the output end of the ultrasonic amplitude transformer 46 is in contact with the welding wire inside the wire guide tube 42.

[0031] Specifically, the ultrasonic transducer 44 is connected with an ultrasonic generator 43, when the ultrasonic vibration system 4 works, the ultrasonic generator 43 converts the power into a high-frequency alternating current signal that can match the ultrasonic transducer 44, the ultrasonic transducer 44 converts the received high-frequency alternating current signal into a high-frequency vibration signal and transmits it to the ultrasonic amplitude transformer 46, because the output end of the ultrasonic amplitude transformer 46 is in contact with the welding wire, the ultrasonic amplitude transformer 46 will perform particle displacement on the received high-frequency vibration signal, and then concentrate and transmit energy to the welding wire, that is, the high-frequency vibration signal generated by the ultrasonic transducer 44 is transferred to the welding wire.

[0032] In a specific embodiment, the mounting seat 41 is slidingly mounted on the positioning rod 5, and the mounting seat 41 is provided with a fixing screw 411 for locking the mounting seat 41.

[0033] Specifically, the mounting seat 41 is provided with a threaded hole (not shown in the figure), the fixing screw 411 is screwed in the threaded hole, when the fixing screw 411 is screwed in the threaded hole, the end of the fixing screw 411 is in contact with the positioning rod 5, the locking of the mounting seat 41 is realized, when the distance between the ultrasonic vibration system 4 and the wire feeder 3 needs to be adjusted, the fixing screw 411 is loosened, the end of the fixing screw 411 is away from the positioning rod 5, then the mounting seat 41 is pushed to slide relative to the positioning rod 5, so the operation is simple.

[0034] In conclusion, the ultrasonic wire feeding additive manufacturing device provided by the utility model can apply ultrasonic vibration to the welding wire, so that the high-frequency vibration signal is transmitted to the molten pool through the welding wire, cavitation is generated in the molten pool, and the beta columnar crystal generated in the solidification process can be effectively broken, the anisotropy problem of improving the internal organization and the mechanical properties of the wire feeding direction and the stacking direction is solved, and the performance of the additive manufacturing part is improved.

[0035] Obviously, those skilled in the art can make various modifications and variations to the utility model without departing from the spirit and scope of the utility model. Thus, if these modifications and variations of the utility model belong to the scope of the utility model claims and equivalent technologies, the utility model also intends to include these modifications and variations.

Claims

1. An ultrasonic wire feeding additive manufacturing device, characterized by, The tungsten electrode welding gun, the wire feeder and the ultrasonic vibration system are jointly connected with a positioning rod, which is movably arranged above the base plate. The ultrasonic vibration system is located at one side of the wire feeder and is used for generating a high-frequency vibration signal and transferring the generated high-frequency signal to the welding wire. The ultrasonic vibration system comprises a mounting seat, a wire guide pipe and an ultrasonic transducer. The mounting seat is mounted on the positioning rod. The wire guide pipe is fixed to the mounting seat through a support rod, and a side wall of the wire guide pipe is provided with a connecting hole. The ultrasonic transducer is mounted on the mounting seat, and the ultrasonic transducer is connected with an ultrasonic amplitude rod. The ultrasonic amplitude rod is fixed to the mounting seat, and an output end of the ultrasonic amplitude rod is located inside the wire guide pipe through the connecting hole. The mounting seat is slidably mounted on the positioning rod, and the mounting seat is provided with a fixing screw for locking the mounting seat.

2. The ultrasonic wire-feeding additive manufacturing device of claim 1, wherein, The mounting seat is provided with a threaded hole, and the fixing screw is threadedly mounted in the threaded hole.

3. The ultrasonic wire-feeding additive manufacturing device of claim 2, wherein, When the fixing screw is screwed in the threaded hole, an end of the fixing screw abuts against the positioning rod.

4. The ultrasonic wire-feeding additive manufacturing device of claim 1, wherein, The support rod is fixedly connected with the wire guide pipe and the mounting seat at two ends respectively.

5. The ultrasonic wire-feeding additive manufacturing device of claim 1, wherein, The tungsten electrode welding gun is filled with argon.

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