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Basal plate for realizing stress in-situ measurement through combination of finite elements, for laser engineered net shaping

A net-shaping, finite element technology, applied in the field of in-situ monitoring of additive manufacturing, can solve the problems of increasing the time cost, high time cost, and increased cost of the laser net forming process, saving economic and time costs, and reducing economic costs. and time cost effect

Active Publication Date: 2020-09-04
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional substrate has the disadvantages of high economic cost and high time cost, that is, the existing measurement scheme is to re-polish and smooth the measurement surface of the substrate before realizing the in-situ monitoring of the substrate deformation in the laser net shaping process. degree of processing
Obviously, the polishing treatment and surface flatness treatment of the substrate measurement surface before in-situ monitoring will not only increase the cost, but also increase the time cost of the laser net shaping process due to the treatment process

Method used

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  • Basal plate for realizing stress in-situ measurement through combination of finite elements, for laser engineered net shaping
  • Basal plate for realizing stress in-situ measurement through combination of finite elements, for laser engineered net shaping
  • Basal plate for realizing stress in-situ measurement through combination of finite elements, for laser engineered net shaping

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Embodiment Construction

[0015] The substrate proposed by the present invention for in-situ measurement of stress in combination with finite elements in laser net shaping has a structure such as figure 1 As shown, it includes a substrate body 1, a specular reflection sheet 5 and a reflection sheet positioning bolt 4; the substrate body 1 is processed with a substrate fixing wing 7, and a substrate positioning hole 8 is opened on the substrate fixing wing 7; the substrate body 1 The upper surface is the manufacturing surface 2, the lower surface of the substrate body 1 is the measuring surface 3, and the measuring surface 3 is processed with evenly distributed measuring surface thread lattice holes 6, and the reflector positioning bolts 4 are connected with the measuring surface thread lattice holes 6 Cooperating with each other, the specular reflection sheet 5 is fixed on the end of the positioning bolt 4 of the reflection sheet.

[0016] Below in conjunction with accompanying drawing, introduce cont...

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Abstract

The invention relates to a basal plate for realizing stress in-situ measurement through combination of finite elements, for laser engineered net shaping, and belongs to the technical field of in-sitemonitoring of additive manufacturing. The basal plate comprises a basal plate body, a mirror surface reflecting sheet and a reflecting sheet positioning bolt; basal plate fixed wings are processed tothe periphery of the basal plate body, the upper surface of the basal plate body is a manufacture surface, the lower surface is a measurement surface, threaded lattice holes are processed in the measurement surface, the reflecting sheet positioning bolt and the threaded lattice holes in the measurement surface are in interaction, and the mirror surface reflecting sheet is fixed to ends of the reflecting sheet positioning bolts. In the basal plate, the mirror plane reflecting sheet is used for replacing polishing treatment of the measurement surface of the basal plate in the prior art, and thedeformation monitoring region of the basal plate can be adjusted as needed. After spare parts manufactured on the basal plate are cut away from the basal plate, before in-situ monitoring, only the mirror surface reflector sheet needs to be replaced, and requirements of a coherent gradient measurement system can be met, so that the economic cost and time cost can be saved.

Description

technical field [0001] The invention relates to a substrate used for in-situ measurement of stress in combination with finite elements in laser net shaping, and belongs to the technical field of in-situ monitoring for additive manufacturing. Background technique [0002] Additive Manufacturing (AM for short), also known as 3D printing, is a manufacturing method that combines computer 3D model data and consolidates them into a whole by point-by-point accumulation. Compared with traditional manufacturing methods, additive manufacturing has many advantages, such as direct manufacturing of composite materials / structural products without design constraints. Especially the laser engineered net shaping process (Laser Engineered Net Shaping, referred to as LENS), has great development potential in the field of aerospace. Although additive manufacturing is developing rapidly, due to the particularity of the manufacturing method, there are still many problems in the products of addit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C64/386B33Y50/00
CPCB33Y50/00B29C64/386
Inventor 谢惠民李加强石文雄刘胜
Owner TSINGHUA UNIV
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