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A high-energy beam selective melting method and equipment with controllable temperature gradient in the forming area

A selective melting, high-energy beam technology, applied in the direction of additive processing, etc., can solve the problems of high-efficiency and near-net shape of metal components that cannot be high-performance directional solidification and single-crystal metal components, and achieve high-efficiency forming, reduced manufacturing, and high precision. Effect

Active Publication Date: 2017-03-08
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the size of the directional solidification products or single crystal products successfully manufactured by the existing high-energy beam selective melting technology is only millimeter-scale, and it is impossible to realize high-performance, large-size, and complex-structure directional solidification metal components and single crystal metal components in a real sense. high-efficiency, near-net-shape

Method used

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  • A high-energy beam selective melting method and equipment with controllable temperature gradient in the forming area
  • A high-energy beam selective melting method and equipment with controllable temperature gradient in the forming area
  • A high-energy beam selective melting method and equipment with controllable temperature gradient in the forming area

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Embodiment 1

[0044] The first preferred high-energy beam selective melting equipment with controllable temperature gradient in the forming area disclosed in the present invention includes a forming component, a control system, a high-energy beam output module, an atmosphere control module and a powder supply and recovery module.

[0045] Such as figure 1 As shown, the forming assembly is composed of a forming cylinder 1, a substrate 2, a temperature measurement module 3, a temperature control module 4 and a substrate lifting drive system 5. Among them, the substrate 2 is located inside the forming cylinder 1; the temperature measurement module 3 includes a temperature measurement sub-module 6 1 ~6 n (n≧2): powder bed temperature measurement sub-module 6 1 Located at any position above the forming cylinder 1 that does not affect the normal operation of the high-energy beam output module 8, it contains a number of infrared thermometers or laser thermometers inside to measure the temperatur...

Embodiment 2

[0066] When the size of the metal component to be formed is small, or the single crystal / directional solidification structure of the metal component to be formed has a strong tendency to form, the following second preferred high-energy beam selective melting equipment with adjustable temperature gradient in the forming area can also be selected , and then take into account the quality and processing cost of directional solidification / single crystal metal products.

[0067] The second preferred high-energy beam selective melting equipment with controllable temperature gradient in the forming area involved in the present invention still includes a forming component, a control system, a high-energy beam output module, an atmosphere control module and a powder supply and recovery module. Among them, the structures and functions of the control system, the high-energy beam output module, the atmosphere control module and the powder supply and recovery module are still the same as tho...

Embodiment 3

[0084] The invention can not only make the temperature gradient in the forming area always meet the directional solidification conditions, and then realize the directional solidification of metal components or the efficient forming of single crystal parts, but also flexibly change the temperature gradient distribution in each stage of the forming process according to the actual processing needs , and then produce various types of functional / structural gradient components. To achieve this purpose, Embodiment 3 discloses a third preferred high-energy beam selective melting device with controllable temperature gradient in the forming area.

[0085] The overall structure of the equipment can still be consistent with the equipment disclosed in Embodiment 1, the difference is that the temperature control sub-module 7 included in the high-energy beam selective melting equipment in this embodiment 1 ~7 n The internal structure and function of the machine have been greatly improved. ...

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Abstract

The invention discloses a high energy beam area-selecting fusing method and device capable of controlling temperature gradient in a shaping area, and a temperature measurement module and a temperature control module are added to a shaping assembly of the device. When the device is used for manufacturing high-energy beam additive, the temperature gradient interval in a molten pool can be calculated in real time utilizing the boundary temperature, acquired by the temperature measurement module, of a shaping area, proper hot-fluid conditions can be applied to the shaping area through the temperature control module to control temperature gradient intervals of the molten pool and the shaping area, so the molten pool can always satisfy conditions of directional solidification, high precision and performance directional solidified metal members and monocrystalline metal members having different sizes and structures can be efficiently manufactured. By adopting the high energy beam area-selecting fusing method and device capable of controlling the temperature gradient in a shaping area, not only the temperature gradient of the shaping area can always satisfy directional solidification conditions, but also the temperature gradient distribution in stages of a shaping process can be flexibly changed according to actual process needs, so various of functional / structural gradient members can be manufactured.

Description

technical field [0001] The invention belongs to the technical field of high-energy beam additive manufacturing, and specifically relates to a high-energy beam selective melting method and equipment with controllable temperature gradient in the forming area, especially suitable for large-size, high-performance, high-precision, and complex structure directionally solidified metal components and single High-efficiency forming of crystalline metal components. Background technique [0002] High-energy beam selective melting technology is an emerging additive manufacturing technology based on powder bed laying. The process can be summarized as follows: firstly, use 3D software to design the 3D model of the part to be formed and convert it into STL format; The slicing process generates a two-dimensional high-energy beam scanning trajectory; then a layer of powder with a certain thickness is preset on the surface of the substrate, and the high-energy beam (laser beam or electron bea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/105B33Y30/00
Inventor 曾晓雁魏恺文王泽敏朱海红张虎
Owner HUAZHONG UNIV OF SCI & TECH
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