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Temperature control device and control method of substrate for additive manufacturing

A temperature control device and additive manufacturing technology, applied in the field of additive manufacturing, can solve the problems of harsh ambient temperature, large heat loss, short service life, etc., to achieve zoned temperature control, timely and accurate temperature control, prevention of cracking and large deformation effect

Pending Publication Date: 2021-12-10
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional substrate temperature control methods are single preheating and cooling, which cannot flexibly control substrate temperature, or use traditional resistance heating for substrate preheating, which has disadvantages such as large heat loss, harsh ambient temperature, and short service life, or does not consider The timeliness of heat transfer cannot accurately control the temperature of the substrate

Method used

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  • Temperature control device and control method of substrate for additive manufacturing
  • Temperature control device and control method of substrate for additive manufacturing
  • Temperature control device and control method of substrate for additive manufacturing

Examples

Experimental program
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Embodiment

[0040] Such as image 3 As shown, the temperature control board 3 is filled with insulating and heat-conducting polymer material methyl vinyl silicone rubber. According to the size of the substrate and formed parts and the path planning, it is divided into 4 rows and 4 columns, a total of 16 rectangular temperature control partitions, numbered A(1-4)-D(1-4), and a spiral excitation copper tube coil is placed in each partition.

[0041] In order to achieve better temperature control effect. The shape of the spiral tube is planned to be a rectangle following the shape of the temperature control zone. The partition shape of the temperature control board is not limited to rectangle, and can also be adjusted to triangle, circle, etc. according to actual needs.

[0042] The multi-channel thermometer 8 relies on the thermocouple 2 to be pasted between the temperature control board 3 and the substrate 1 to monitor the temperature of the lower surface of the substrate 1 and the upper...

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Abstract

The invention belongs to the related technical field of additive manufacturing, and discloses a temperature control device and method of a substrate for additive manufacturing. The device comprises a temperature control board, a temperature detection system and a temperature control system. The temperature control board is arranged below the substrate and comprises a plurality of subareas, and each subarea is internally provided with a hollow metal spiral coil. The temperature monitoring system comprises an infrared thermal imager, a thermocouple and multiple channels of thermodetectors. The temperature control system comprises a control cabinet, a water cooling machine, an alternating current power supply and a subarea channel valve. The control cabinet performs electromagnetic heating or cooling water cooling on the substrate subareas based on a heat transfer rule and a temperature monitoring result. According to the invention, timely and accurate temperature regulation and control of different areas of the substrate for additive manufacturing can be achieved, so that temperature distribution of the substrate is regulated and controlled, stress and deformation of the substrate are controlled, and cracking and large deformation of the substrate in the additive manufacturing process are prevented.

Description

technical field [0001] The invention belongs to the technical field related to additive manufacturing, and more specifically relates to a temperature control device and a control method of a substrate for additive manufacturing. Background technique [0002] Metal additive manufacturing technology generally uses high-energy beams (laser, electron beam or electric arc) for localized metal wire / powder fusion deposition. On the one hand, metal parts experience periodic rapid cooling and rapid heating, melting, solidification and solid phase transition, and the uneven expansion and contraction of materials in space and time lead to complex thermal stress and deformation of formed parts and substrates, which may cause cracks in formed parts and substrates or large deformation. On the other hand, in the metal additive manufacturing process, because the temperature of the substrate directly affects the spreading and solidification of the molten pool of the formed part, it is neces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D23/22
CPCG05D23/22
Inventor 赵旭山张海鸥符友恒王凯李润声张开诚陈曦张全文
Owner HUAZHONG UNIV OF SCI & TECH
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