Manufacturing method of layered object and layered manufacturing device

By monitoring and controlling the surface temperature of intermediate objects in additive manufacturing, the method prevents overheating and structural abnormalities, ensuring continuous device operation and enhanced manufacturing efficiency.

JP7727418B2Active Publication Date: 2025-08-21HITACHI LTD
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Patent Information

Application Number
JP2021097041
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2021-06-10
Publication Date
2025-08-21
Estimated Expiration
2041-06-10

AI Technical Summary

Technical Problem

Additive manufacturing devices can unintentionally shut down due to structural abnormalities such as expansion and deformation caused by overheating during the powder bed formation process, which existing technologies fail to adequately address.

Method used

A method that includes determining the surface temperature of an intermediate object during manufacturing, comparing it to a predetermined threshold value, and adjusting the powder bed formation process to prevent overheating by forming the powder bed only when the surface temperature is below the threshold, thereby preventing structural abnormalities and device shutdowns.

Benefits of technology

This approach prevents unintended shutdowns of the additive manufacturing device, ensuring continuous operation and improving manufacturing efficiency by avoiding overheating-related structural issues.

✦ Generated by Eureka AI based on patent content.

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Abstract

To provide a method for manufacturing a laminated molded article capable of reducing an unintended stop of a laminate molding apparatus.SOLUTION: A method for manufacturing a laminated molded article includes: step S1 of forming a predetermined layer that is a metal layer by irradiation of a powder bed of a metal material with light beam; step S3 of determining a surface temperature of a molded article intermediate product obtained through the step S1; step S4 of determining whether the molded article intermediate product is in an overheat state on the basis of the surface temperature and a predetermined threshold value indicating the overheat state of the molded article intermediate product; and step S5 of forming the powder bed on the predetermined layer when a determination is made that it is not the overheat state as a result of the determination in step S4.SELECTED DRAWING: Figure 1
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Citation Information

Patent Citations

  • Three-dimensional product manufacturing device and manufacturing method

    JP2006513055A

  • Method and system for producing lamination molding

    JP2018162500A

  • Three-dimensional layering modeling apparatus, three-dimensional layering modeling method, and three-dimensional layered model

    WO2019030839A1

  • Method for manufacturing three-dimensionally shaped molded article, and device for manufacturing three-demonsionally shaped molded article

    WO2020218449A1