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3D printing system and method for controlling size of molten pool formed during printing process

A technology of printing process and printing system, which is applied in the direction of manufacturing tools, additive manufacturing, energy efficiency improvement, etc., can solve the problem of not developing real-time control of molten pool, etc., and achieve the effect of improving quality and process efficiency

Inactive Publication Date: 2021-07-16
KOREA ADVANCED INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, no technique has been developed for real-time control of the melt pool size

Method used

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  • 3D printing system and method for controlling size of molten pool formed during printing process
  • 3D printing system and method for controlling size of molten pool formed during printing process
  • 3D printing system and method for controlling size of molten pool formed during printing process

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Embodiment Construction

[0038] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The present disclosure can be implemented in various forms and is not limited to the embodiments described here. In the drawings, in order to clearly describe the present disclosure, parts irrelevant to the description are omitted, and the same reference numerals designate the same or similar elements throughout the specification.

[0039] A 3D printing system according to an embodiment of the present disclosure is a system capable of melting a substrate using a laser to form a three-dimensional object, and also estimating the temperature of a melted melt pool during 3D printing in real time. In this case, the 3D printing system according to an embodiment of the present disclosure may be a DED type 3D printing system capable of forming a 3D object by melting metal powder or metal wire with a laser.

[0040] figure 1 A configuration of a 3D printi...

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Abstract

Disclosed are a method for controlling a size of a molten pool formed during a 3D printing process in real time and a system for the same. A thermal image of the molten pool is taken by a thermal imaging camera. A temperature interface exceeding a melting point of a base metal is specified in the thermal image. A size of the molten pool is obtained by estimating a length, a width, and a depth of the molten pool using the temperature interface. A predicted size of the molten pool is obtained using an artificial neural network model. An actually measured size of the molten pool is derived from a surface temperature of the molten pool. An error between the predicted size and the measured size of the molten pool is calculated to be used for controlling the size of the molten pool in real time.

Description

technical field [0001] The present disclosure relates to three-dimensional (3D) printing, and more particularly, to 3D printing systems and methods capable of controlling the size of a molten pool formed during 3D printing. Background technique [0002] 3D printing is known as a manufacturing technique for producing 3D objects. For 3D printing of 3D objects, it is processed in a layer-by-layer manner according to 3D model data processing information. The advantage of 3D printing technology is that it is easy to realize complex shapes, form shapes inside products, etc. Due to these advantages, 3D printing technology has attracted attention as a high value-added technology that makes it easy to manufacture various products such as various industrial parts and medical materials. [0003] The 3D printing process can be performed by dividing the shape of a 3D product into multiple 2D sections with uniform or variable thickness, and forming the 2D sections to be stacked one by o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105B33Y50/02
CPCB33Y50/02Y02P10/25B22F10/25B22F10/368B22F12/90B22F10/36B22F2999/00B33Y10/00B23K31/125B23K31/006B23K26/342B23K26/032B23K26/034G06T7/60G06T2207/10048G06T2207/20081G06T2207/20084G06T2207/10016B22F2203/03B22F12/41G06T7/50G06T7/62G06T7/0004B23K26/705B23K26/067B23K26/0648B22F2203/11G06T2207/30164B33Y30/00B22F10/85
Inventor 孙勋全益槿
Owner KOREA ADVANCED INST OF SCI & TECH
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