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Additive Manufacturing Device Capable of Magnetic Field Control and Base Metal Transport

A technology for additive manufacturing and control devices, which is applied in the direction of additive manufacturing, additive processing, and energy efficiency improvement. It can solve the problems of limited control means for solidified tissue in laser three-dimensional forming, and achieve shrinkage cavity avoidance, simple production process, and realization of equipment The effect of the upgrade

Active Publication Date: 2021-08-10
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The technology of controlling the metal solidification process through the static magnetic field provides a new idea to solve the metal solidification control in the above-mentioned laser metal additive manufacturing, but it has not been applied to the field of laser metal additive manufacturing technology. At present, the laser three-dimensional forming solidification structure limited means of control

Method used

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  • Additive Manufacturing Device Capable of Magnetic Field Control and Base Metal Transport
  • Additive Manufacturing Device Capable of Magnetic Field Control and Base Metal Transport

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In this example, see figure 1 and figure 2 , an additive manufacturing device capable of magnetic field control and parent material transportation, mainly including the rack body of the additive manufacturing device, a control device, a laser device, a power supply device, a raw material supply device and a working platform, and the parts to be manufactured are working Prepared on the substrate on the platform, the control device mainly sends control instructions to each device after data processing according to the information collected by the corresponding device and the information input by the user, the power supply device provides electric energy for each device, and the laser device mainly includes a laser emitter The laser emitter light source device is fixedly installed on the frame body of the additive manufacturing device, providing a laser heat source with adjustable radiation direction and power, and setting the focus of the emitted laser beam on the substr...

Embodiment 2

[0044] This embodiment is basically the same as Embodiment 1, especially in that:

[0045] In this embodiment, the additive manufacturing base material transport device adopts the wire material conveying method to provide raw materials for the additive manufacturing process. The wire base material is directly sent to the substrate on the working platform from the wire material transport outlet 1, and is laser After melting, a molten pool is formed. In this embodiment, when wire printing is performed, the base material is directly sent from the wire material delivery outlet 1 to the substrate of the workbench, and is melted by the laser to form a molten pool. Others are the same as the powder feeding printing method adopted in the first embodiment. In this embodiment, the metal wire is directly transported into the melting pool through pipelines due to its special shape. In laser metal additive manufacturing, the base material powder used in Embodiment 1 is a non-magnetic mate...

Embodiment 3

[0048] This embodiment is basically the same as the previous embodiment, and the special features are:

[0049] In this embodiment, the base material transportation device for additive manufacturing adopts the powder-spreading method to provide raw materials for the additive manufacturing process, and the base material is transported by pre-powdering. The laser emitter does not move during laser scanning, and the magnetic field control device 7 and the substrate Keep relatively still, and keep the center of the part to be manufactured at the center of the magnetic field during the additive manufacturing process.

[0050] In this embodiment, during laser metal additive manufacturing, by applying an external electromagnetic field to the printing device, non-contact intervention is performed on the rapid melting-solidification process of the base material after being irradiated by laser light, thereby realizing the control of the solidification process of the metal parts. The reg...

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Abstract

The invention discloses an additive manufacturing device capable of magnetic field control and parent material transportation. A magnetic field is applied during the rapid solidification process of metal laser three-dimensional forming. Under the action of the magnetic field, heat can be generated at the rapidly solidified solid / liquid interface. The interaction of electric current, thermal current and magnetic field produces thermo-electromagnetic force that triggers the flow of melt. The end of the dendrite is sheared by the force, causing the dendrite to break, forming a large number of new crystal nuclei, and increasing the nucleation rate; the magnetic field inhibits the metal Melt flow weakens segregation during solidification. The present invention uniquely combines base material transport devices for different types of laser metal additive manufacturing to realize base material transport and tissue control in multiple printing situations of powder spreading, powder feeding and wire feeding. The magnetic field control device is fixed on the laser transmitter as the base metal transport device to ensure that the laser molten pool is always in the center of the magnetic field, which is convenient for controlling the magnetic field and further exploring the influence of the magnetic field on the rapid solidification process of laser three-dimensional forming.

Description

technical field [0001] The invention relates to an additive manufacturing process equipment, in particular to a device for manufacturing parts by using a laser heat source, metal powder or wire and its conveying device, which is applied in the fields of metal solidification structure control and electromagnetic metallurgy technology. Background technique [0002] Laser metal additive manufacturing uses laser as a heat source to regionally melt and rapidly solidify metal powder or wire, and to layer the geometric structure of the part to be manufactured in two dimensions, and print the three-dimensional part one layer by layer Print out layer by layer. Due to its special manufacturing process, this manufacturing method can directly print parts with almost any geometry, such as directly printing rings nested in each other and so on. At present, the materials used in laser additive manufacturing technology have covered high-temperature alloys such as Ti alloys, nickel-based al...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/105B33Y50/02
CPCB33Y50/02B22F2999/00B22F10/00B22F10/28B22F12/86B22F10/32B22F12/53B22F2202/05B22F2202/07Y02P10/25
Inventor 王江任忠鸣时令聂建文刘小器赵睿鑫
Owner SHANGHAI UNIV
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