CN207386797U - A kind of laser assisted ultrasound increasing material manufacturing device of metallic foil - Google Patents

Abstract

The utility model discloses a laser-assisted ultrasonic material additive manufacturing device for a metal foil strip. The device comprises a workbench, an ultrasonic roll welding pressure head located on the workbench, and ultrasonic transducers installed at both ends of the ultrasonic roll welding pressure head. Transducer one and ultrasonic transducer two, the rear of the ultrasonic roll welding indenter is provided with a scanning laser head and shielding gas device, the scanning laser head and shielding gas device are connected with ultrasonic transducer one and ultrasonic transducer two The horizontal feed rate is the same, and the metal foil strip is placed under the ultrasonic roll welding pressure head on the workbench. An infrared thermometer is installed on the side of the metal foil strip, and the infrared thermometer is connected with the scanning laser head signal through the control system. connect. The utility model uses the laser beam to follow the ultrasonic roll welding pressure head to carry out secondary consolidation on the welding part, and uses the laser consolidation technology to assist ultrasonic rapid prototyping to promote the atomic diffusion of the metal foil strip at the bonding interface to achieve high efficiency, high quality and energy saving Environmentally friendly ultrasonic additive manufacturing process.

Description

A laser-assisted ultrasonic additive manufacturing device for metal foil strips

technical field

The utility model relates to the field of ultrasonic welding additive manufacturing, in particular to a laser-assisted ultrasonic additive manufacturing device and a manufacturing method for a metal foil strip.

Background technique

Additive Manufacturing (AM) technology, commonly known as 3D printing, Rapid Prototyping, or Solid Free-form Fabrication, is a science and technology that directly manufactures parts driven by the three-dimensional data of the parts based on the discrete-accumulation principle. system, known as a breakthrough in the field of manufacturing. Ultrasonic Additive Manufacturing (UAM) technology was transformed by the University of Michigan in 1999 and established a company. Additive manufacturing has achieved a wide range of applications. This technology achieves high-strength interatomic solid-phase bonding of materials through high-frequency vibration and friction between metal foils, and at the same time cooperates with precision numerical control machining and other subtractive manufacturing technologies to achieve near-net shape of parts.

In practical application, this technology has the following defects: First, the power of the ultrasonic generator and transducer is limited, the power of a single transducer is generally below 6KW and the price is expensive, and the thickness of the connectable foil is small, generally below 0.5mm and The width does not exceed 20mm. Secondly, under the limitation of the power of existing equipment, some metal materials such as aluminum and copper have relatively high thermal conductivity, which is prone to insufficient energy and reduced connection strength during the ultrasonic welding process.

To sum up, the current ultrasonic additive manufacturing technology is mainly limited by the maximum power of the transducer, the thermodynamic properties of the material itself, the heat conduction mode of the material, and the difference in heat dissipation conditions. The combination quality and efficiency of ultrasonic additive manufacturing parts still restrict The development and application of this technology.

Utility model content

In order to solve the above technical problems, the utility model provides a laser-assisted ultrasonic additive manufacturing device and manufacturing method of metal foil strips, so as to promote the atomic diffusion of metal foil strips at the bonding interface, so as to achieve high efficiency, high quality, energy saving and environmental protection The purpose of the ultrasonic additive manufacturing process.

In order to achieve the above object, the technical scheme of the utility model is as follows:

A laser-assisted ultrasonic additive manufacturing device for metal foil strips, comprising a workbench, an ultrasonic roll welding pressure head positioned on the workbench, and ultrasonic transducers and ultrasonic transducers installed at both ends of the ultrasonic roll welding pressure head Device two, the rear of the ultrasonic roll welding pressure head is provided with a scanning laser head and a shielding gas device, and the horizontal feed speed of the scanning laser head and the shielding gas device is the same as that of the ultrasonic transducer one and the ultrasonic transducer two, A metal foil strip is placed on the workbench under the ultrasonic roll welding indenter, and an infrared thermometer is arranged above the side of the metal foil strip, and the infrared thermometer is connected to the scanning laser head signal through the control system.

In the above solution, the metal foil strip includes aluminum, copper, nickel, titanium and alloys thereof.

In the above solution, the power of the first ultrasonic transducer and the second ultrasonic transducer is 4000W.

In the above solution, the laser generator of the scanning laser head is a continuous fiber laser with a wavelength of 1064nm, the maximum power is 200W, the spot diameter is 0.06mm, and the maximum width of the spot radiation of the scanning laser head is 40mm.

A manufacturing method of a laser-assisted ultrasonic additive manufacturing device for metal foil strips. The ultrasonic roll welding pressure head performs roll welding processing on the metal foil strips placed on the workbench, and the scanning laser head performs secondary welding on the rolled metal foil strips. Secondary consolidation, increasing the thickness of the diffusion layer at the connection interface, improving the quality of laminated parts.

In a further technical solution, the infrared thermometer controls the temperature at the contact position between the scanning laser head and the metal foil strip through a control system.

In a further technical solution, the metal foil strips are stacked and formed continuously by laying parallel multilayers and vertically laying multilayers, or by stacking in any other manner.

In a further technical solution, the protective gas device provides gas protection for the processing area of the scanning laser head.

Through the above technical scheme, the laser-assisted ultrasonic additive manufacturing device and manufacturing method of metal foil provided by the utility model are suitable for ultrasonic welding and rapid prototyping of aluminum, copper, nickel, titanium and other metal materials and their alloy materials. Secondary laser consolidation is performed on materials such as aluminum and titanium after ultrasonic additive manufacturing to increase the thickness of the diffusion layer at the connection interface and improve the quality of laminated parts. The welding process still uses ultrasonic energy as the main energy source, and the interlayer bonding of metal foils is connected by solid phase Mainly, it can be applied to the rapid preparation and molding of high-strength, high-density parts, composite materials, and functionally graded materials.

The utility model adopts a non-contact infrared thermometer and a linear laser source to establish a closed-loop control and adjustment system to monitor the temperature of the metal foil strip and the substrate to be welded in real time, quickly and effectively, and effectively avoid the cast structure during the rapid prototyping process. The laser secondary consolidation stability at the bonding interface is guaranteed.

The laser secondary consolidation system and the ultrasonic welding control system communicate with the host computer to form an organic whole with high-precision synergy.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art.

Fig. 1 is a schematic structural diagram of a laser-assisted ultrasonic additive manufacturing device for a metal foil strip disclosed in an embodiment of the present invention;

Fig. 2 is another perspective schematic diagram of Fig. 1;

Figures 3a, 3b and 3c are schematic diagrams of the lamination method between the metal foil strips.

In the figure, 1. Ultrasonic transducer 1; 2. Ultrasonic roll welding pressure head; 3. Working table; 4. Metal foil belt; 5. Shielding gas device; 6. Scanning laser head; 7. Ultrasonic transducer 2.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

The utility model provides a laser-assisted ultrasonic additive manufacturing device and a manufacturing method of a metal foil strip, and the specific implementation method is as follows:

As shown in Figures 1 and 2, the laser-assisted ultrasonic additive manufacturing device for metal foil strips includes a workbench 3, an ultrasonic roll welding head 2 located on the workbench 3, and an ultrasonic welding head 2 installed at both ends of the ultrasonic roll welding head 2. Transducer one 1 and ultrasonic transducer two 7, the rear of ultrasonic roll welding pressure head 2 is provided with scanning laser head 6 and shielding gas device 5, scanning laser head 6 and shielding gas device 5 and ultrasonic transducer one 1 and The horizontal feed speed of the ultrasonic transducer 2 7 is the same, and the metal foil strip 4 is placed under the ultrasonic roll welding pressure head 2 on the workbench 3, and an infrared thermometer (not shown in the figure) is arranged above the side of the metal foil strip 4 , the infrared thermometer is connected with the scanning laser head 6 through the control system.

The power of ultrasonic transducer 1 and ultrasonic transducer 2 in this embodiment is 4000W. The laser generator of the scanning laser head is a continuous fiber laser with a wavelength of 1064nm, the maximum power is 200W, the spot diameter is 0.06mm, and the maximum width of the spot radiation of the scanning laser head is 40mm.

The entire additive manufacturing process of the utility model is completed on the workbench 3, and the aluminum and titanium foil strips are sequentially fixed on the workbench 3 before rapid prototyping, and the laser generator and the ultrasonic transducer of the scanning laser head 6 are turned on. 1 and the power supply of the ultrasonic transducer 2 7, when the welding of the ultrasonic roll welding head 2 starts, the scanning laser head 6 emits a laser beam to act on the position behind the ultrasonic roll welding head 2, and performs secondary consolidation on it to achieve high High-quality and efficient solid-phase connection. The ultrasonic rapid prototyping additive manufacturing process can be realized by interspersing and repeatedly adding aluminum and titanium foil strips according to the above steps (refer to one of the methods in Figures 3a, 3b, and 3c) for multi-layer welding.

The utility model is not limited to the ultrasonic welding and rapid prototyping of the materials listed above, and is also applicable to copper, nickel and other metal materials and their alloys. Compared with the prior art, the laser beam secondary consolidation method adopted by the utility model can effectively increase the thickness of the atomic interdiffusion layer of the materials on both sides of the bonding interface, and at the same time, it is beneficial to the high-quality bonding between multi-layer metals. While improving the efficiency, the connection quality is further improved, and it has great application prospects in the mass production of rapid prototyping parts.

The above description of the disclosed embodiments enables those skilled in the art to realize or use the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims (4)

1. A laser-assisted ultrasonic additive manufacturing device for a metal foil strip, characterized in that it includes a workbench, an ultrasonic roll welding pressure head positioned on the workbench and an ultrasonic transducer installed at both ends of the ultrasonic roll welding pressure head device one and ultrasonic transducer two, the rear of the ultrasonic roll welding pressure head is provided with a scanning laser head and a shielding gas device, and the scanning laser head and shielding gas device are connected with the ultrasonic transducer one and ultrasonic transducer two The horizontal feed rate is the same, and the metal foil strip is placed under the ultrasonic roll welding pressure head on the workbench. An infrared thermometer is installed on the side of the metal foil strip. The infrared thermometer is connected to the scanning laser head through the control system. signal connection. 2 . The laser-assisted ultrasonic additive manufacturing device for metal foil strips according to claim 1 , wherein the metal foil strips include aluminum, copper, nickel, titanium metals and alloys thereof. 3 . 3. A laser-assisted ultrasonic additive manufacturing device for metal foil strips according to claim 1, characterized in that the power of the first ultrasonic transducer and the second ultrasonic transducer is 4000W. 4. The laser-assisted ultrasonic additive manufacturing device of a metal foil strip according to claim 1, wherein the laser generator of the scanning laser head is a continuous fiber laser with a wavelength of 1064nm, the maximum power is 200W, and the light spot The diameter is 0.06mm, and the maximum width of the spot radiation of the scanning laser head is 40mm.