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A high -temperature overall preheating auxiliary additive manufacturing device and method

A technology of additive manufacturing and high temperature, which is applied in the field of high-temperature overall preheating auxiliary additive manufacturing devices, can solve the problems of discontinuous preheating, low preheating temperature, small preheating area, etc., to reduce forming thermal stress, reduce Overall temperature gradient, effect of suppressing cracking tendency

Active Publication Date: 2021-12-17
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of many problems existing in the existing high-temperature preheating methods, such as small preheating area, discontinuous preheating, and low preheating temperature, the present invention proposes a high-temperature overall auxiliary preheating auxiliary additive manufacturing device and method

Method used

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  • A high -temperature overall preheating auxiliary additive manufacturing device and method
  • A high -temperature overall preheating auxiliary additive manufacturing device and method
  • A high -temperature overall preheating auxiliary additive manufacturing device and method

Examples

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Effect test

Embodiment 1

[0040] Direct laser deposition of Al assisted by high temperature bulk preheating 2 o 3 / Al 2 TiO 5 Composite ceramic materials as an example, such as figure 1 As shown, the high-temperature overall preheating assisted additive manufacturing device adopts the equipment of the invention, which specifically includes the following steps:

[0041] Fix the high-temperature chamber 5 on the load-bearing frame 6, install the heat-resistant protective cover of the additive deposition head on the additive deposition head 2, and ensure that the temperature of the additive deposition head 2 does not exceed 50°C during the forming process. The additive deposition head 2 enters the cavity through the upper opening of the high-temperature cavity 5, the substrate support rod 9 enters the cavity through the lower opening of the high-temperature cavity 5, and the upper part of the cavity 4 and the lower part of the cavity are respectively covered with a heat-insulating protective cover 4. ...

Embodiment 2

[0051] Direct laser deposition of Al assisted by high temperature bulk preheating 2 o 3 / Al 2 TiO 5 Composite ceramic materials as an example, such as figure 2 As shown, the high-temperature overall preheating assisted additive manufacturing device adopts the equipment of the invention, which specifically includes the following steps:

[0052] Fix the high-temperature chamber 5 on the load-bearing frame 6, install the heat-resistant protective cover of the additive deposition head on the additive deposition head 2, and ensure that the temperature of the additive deposition head 2 does not exceed 50°C during the forming process. The additive deposition head 2 enters the cavity through the upper opening of the high-temperature cavity 5, the substrate support rod 9 enters the cavity through the lower opening of the high-temperature cavity 5, and the upper part of the cavity 4 and the lower part of the cavity are respectively covered with a heat-insulating protective cover 4. ...

Embodiment 3

[0062] Direct laser deposition of Al assisted by high temperature bulk preheating 2 o 3 / Al 2 TiO 5 Composite ceramic materials as an example, such as image 3 As shown, the high-temperature overall preheating assisted additive manufacturing device adopts the equipment of the invention, which specifically includes the following steps:

[0063] Fix the high-temperature chamber 5 on the load-bearing frame 6, install the heat-resistant protective cover of the additive deposition head on the additive deposition head 2, and ensure that the temperature of the additive deposition head 2 does not exceed 50°C during the forming process. The additive deposition head 2 enters the cavity through the upper opening of the high-temperature cavity 5, the substrate support rod 9 enters the cavity through the lower opening of the high-temperature cavity 5, and the upper part of the cavity 4 and the lower part of the cavity are respectively covered with a heat-insulating protective cover 4. ...

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Abstract

The invention relates to a high-temperature integral preheating auxiliary additive manufacturing device and method, belonging to the technical field of additive manufacturing. The high-temperature overall preheating auxiliary system includes a high-temperature cavity, a thermal insulation shield for the cavity, a heating element, a driving mechanism, a high-temperature thermocouple and a substrate support mechanism. The high-temperature chamber is fixed on the load-bearing frame and keeps its absolute position unchanged. The driving mechanism drives the forming substrate to move synchronously through the substrate support mechanism to realize relative movement with the additive deposition head. The invention can realize the uniform preheating and slow cooling of the entire formed component, reduce the forming thermal stress in the additive manufacturing process, thereby effectively inhibiting material cracking and significantly improving the mechanical properties of the material. Synchronous preheating and slow cooling of the formed substrate and the deposited components by the heating device can reduce the residual stress and effectively increase the size of the defect-free components; by changing the preheating temperature and preheating rate, the microstructure can be customized and the special performance can be prepared. member.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and relates to a high-temperature integral preheating auxiliary additive manufacturing device and method. Background technique [0002] The emergence of additive manufacturing technology provides a new option for the efficient preparation of complex components. This technology is simple in process and low in cost, which can greatly improve the production efficiency; additive manufacturing technology gets rid of the limitations of molds, and can easily realize arbitrary complex shapes and Preparation of functionally graded building blocks. However, due to the extremely high cooling rate and temperature gradient of the molten pool formed by high-energy beams such as laser / electron beams in the additive manufacturing process, there is a large forming thermal stress during the forming process of the component, which can easily cause cracking and warping of the component. curved deform...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/105B28B1/00B28B17/00B33Y30/00B33Y50/02
CPCB28B1/001B28B17/00B28B17/0063B33Y30/00B33Y50/02B22F2003/1051Y02P10/25B22F10/25B22F12/10
Inventor 吴东江黄云飞牛方勇马广义
Owner DALIAN UNIV OF TECH
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