• Title/Summary/Keyword: Laminated Stamping

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Experimental Study on Mixed-Model Production of Stator and Rotor using Motor Core Laminated Stamping Die Technology for Attaching and Detaching Cam (Cam 착탈 방식의 모터코어 적층금형 기술을 적용한 Stator와 Rotor의 다종 혼류 생산에 대한 연구)

  • Park, D.H.;Hwang, P.J.
    • Transactions of Materials Processing
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    • v.26 no.4
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    • pp.240-245
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    • 2017
  • Mixed-model production technology is a method of producing multiple products with one production process and production line in order to reduce wasted manpower and adjust to market trends. In other words, mixed-model production is a flexible production system that changes production volume by model according to market demand. This study has developed a progressive laminated stamping die technology to enable flexible production of a motor core consisting of attaching and detaching the Cam on the back of the punch so that two kinds of stator and two kinds of rotor could be produced in one progressive die.

Microstructure, Defects and Mechanical Properties of DED Metal Deposited Heat-Resistant Mold Steel (내열 금형강 DED 금속적층재의 조직, 결함 및 기계적 물성 평가)

  • Choi, Sung-Jong;Kim, Ho-Chan
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.21 no.3
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    • pp.12-21
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    • 2022
  • Directed energy deposition (DED) was adopted as a metal additive manufacturing method to develop a mold for the hot stamping process. The test piece was machined from Heatvar laminate material, and results were obtained through microstructure and defect observations, as well as hardness, tensile strength, and joint strength tests. 1) Spherical pores and irregular-shaped cavities were observed as lamination defects, and columnar dendrites formed in the structure, which tended to become coarse upon heat treatment. 2) The hardness of the heat-treated material (480HV) was slightly lower than that of the non-heat-treated material (500HV). 3) In the tensile test, the maximum tensile stress and strain of the heat-treated material were 1392 MPa and 15%, respectively, which were slightly higher than the values of 1381 MPa and 13%, respectively, for the non-heat-treated material. 4) In the case of the early final fracture in the tensile test, in most cases, pores or irregularly shaped cavities were observed at the fracture surface or near the surface. 5) In the joint strength test, most of the specimens finally fractured in the laminated metal area, and the fracture surface was intragranular. In addition, dimples formed over the entire area on the fracture surface of the fractured specimen after sufficient elongation.