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Metallic molten pool internal contour online measurement device and method

A technology of metal molten pool and measuring equipment, which is applied in the direction of measuring devices, instruments, optical devices, etc., to achieve the effect of realizing the quality of parts manufacturing

Active Publication Date: 2019-01-25
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the monitoring of the internal quality of the molten pool is the key to achieving high-quality printing. Typical defects such as pores, cracks, and unmelted are mostly produced during melting and solidification; the flow state inside the molten pool and the liquid-solid interface transition during melting and solidification closely related to printing parameters

Method used

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  • Metallic molten pool internal contour online measurement device and method
  • Metallic molten pool internal contour online measurement device and method

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Embodiment Construction

[0027] Below in conjunction with the embodiment shown in the accompanying drawings, the present invention is described in detail as follows:

[0028] On-line measurement equipment for the internal profile of the molten metal pool, which includes an excitation component, a receiving component, and a computer for data analysis and control. The excitation component includes an excitation laser, and a beam splitter for dividing the beam emitted by the excitation laser into multiple beams. The array optical fiber is used to respectively accept multiple beams, and the computer has a dynamic modulation module for dynamically modulating the beams. The receiving component includes a laser receiver, a receiving optical fiber group, and a motion mechanism that drives the receiving optical fiber group to move, or it includes a laser receiver and a vibrating mirror system.

[0029] Such as figure 1 Shown, the on-line measurement method of the internal profile of molten metal pool, it comp...

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Abstract

The invention discloses a metallic molten pool internal contour online measurement device and method. The device comprises an excitation assembly, a receiving assembly and a computer for data analysisand control; the excitation assembly comprises a laser, a beam splitter for dividing a beam emitted by the laser into a plurality of beams, and a plurality of sets of array optical fibers for receiving the plurality of beams respectively; and the computer is provided with a dynamic modulation module for dynamically modulating the beam. With the metallic molten pool internal contour online measurement device and method of the invention adopted, metallic molten pool internal contour online measurement can be realized based on a laser ultrasonic phased array detection technology; and a printingprocess can be adjusted according to a detection result, so that high manufacturing quality of parts can be realized.

Description

technical field [0001] The invention belongs to the technical field of on-line monitoring of additive manufacturing, and in particular relates to an on-line measurement device and method for the internal contour of a molten metal pool. Background technique [0002] Direct energy deposition (Direct Energy Deposition, DED) technology is the mainstream method of metal additive manufacturing. Through laser, plasma, electron beam and other heat sources, a molten pool is generated in the deposition area and moves at a high speed to melt the material powder or wire fed synchronously. Layer-by-layer deposition enables net near-shaping of parts with arbitrary complex shapes. However, due to factors such as unreasonable manufacturing process design, long-term operation stability of equipment, and external environment, metal additive parts inevitably have process defects, which restrict the development and application of metal additive manufacturing technology. [0003] At home and ab...

Claims

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Application Information

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IPC IPC(8): G01B11/24G01B17/06
CPCG01B11/24G01B17/06
Inventor 丁辉戴挺李家奇
Owner SOUTHEAST UNIV
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