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A combined structure that controls heat conduction deformation in a closed state

A combination structure and heat conduction technology, applied in the field of additive manufacturing, can solve the problems affecting the stability of equipment operation, precision and printing accuracy, and the influence of preheating, etc., and achieve obvious heat insulation effect, reduce thermal deformation, and easy to implement Effect

Active Publication Date: 2021-07-27
AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As a result of preheating, heat conduction will occur, and the resulting thermal deformation of related equipment parts will eventually affect the operation stability, precision and printing accuracy of the equipment.
[0003] The existing way to solve the thermal deformation of the substrate is to apply a certain prestress to the substrate, but this method is mainly to reduce the influence of the laser heat source on the deformation of the substrate, and does not consider the influence of preheating, which has great limitations

Method used

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  • A combined structure that controls heat conduction deformation in a closed state
  • A combined structure that controls heat conduction deformation in a closed state
  • A combined structure that controls heat conduction deformation in a closed state

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Embodiment Construction

[0028] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The detailed description and accompanying drawings of the following embodiments are used to illustrate the principles of the present invention, but cannot be used to limit the scope of the present invention, that is, the present invention is not limited to the described embodiments, without departing from the spirit of the present invention Any modification, substitution and improvement of parts, components and connection methods are covered under.

[0029] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

[0030] Preheating is an important link in the laser selective melting rapid prototyping process....

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Abstract

The invention relates to a combined structure for controlling thermal conduction deformation in a closed state. The structure includes a printing substrate, a supporting platform, a forming box, a ram and a guide rail. The printing substrate and the ram are respectively arranged on the upper and lower parts of the supporting platform by fasteners, and are connected as an integral structure, so A vertical guide rail is arranged between the ram and the forming box, and the ram drives the support plane and the printing substrate to move up and down in the closed space of the forming box through the guide rail, and inside the supporting platform An embedded preheating element is installed, a thermal insulation layer and an automatic thermal deformation adjustment structure are arranged between the ram and the support platform, and the thermal insulation layer is used to isolate the heat conduction to the ram and the guide rail. , During preheating, the thermal deformation automatic adjustment structure is used to adjust the vertical installation gap between the support platform and the ram, so as to eliminate the thermal deformation of the printing substrate caused by heat conduction.

Description

technical field [0001] The invention relates to the technical field of additive manufacturing, in particular to a combined structure for controlling thermal conduction deformation in a closed state. Background technique [0002] Selective laser melting is an important rapid prototyping technology, which uses laser to irradiate powder materials to realize the forming and solidification of workpieces. Preheating is an important link in the laser selective melting rapid prototyping process. Without preheating or improper preheating, the forming time will be increased, resulting in low performance and poor precision of the formed part, and even affecting the normal printing process. Therefore, the preheating process for the printed substrate is indispensable. As a result of preheating, heat conduction will occur, and the resulting thermal deformation of related equipment components will eventually affect the operation stability, precision and printing accuracy of the equipment....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C64/20B29C64/295B29C64/153B29C64/364B33Y30/00B33Y40/00B33Y10/00
CPCB33Y10/00B33Y30/00B33Y40/00B29C64/153B29C64/20B29C64/295B29C64/364
Inventor 王海涛孙年俊刘旭东李初晔李栋芳
Owner AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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