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Study of Production and Material Properties of Micro Screw Using SWCH18A and SUS XM7 Materials

SWCH18A 와 SUS XM7 을 적용한 초소형 나사제작 및 물성분석에 관한 연구

  • Ra, Seung-Woo (Seoul metal Co., Ltd, Research and Development Center) ;
  • Kim, In-Rak (Seoul metal Co., Ltd, Research and Development Center) ;
  • Hwang, Sung Tack (Seoul metal Co., Ltd, Research and Development Center)
  • 나승우 ((주)서울금속 기술연구소) ;
  • 김인락 ((주)서울금속 기술연구소) ;
  • 황성택 ((주)서울금속 기술연구소)
  • Received : 2014.04.21
  • Accepted : 2014.05.30
  • Published : 2014.09.01

Abstract

As micro screws feature reduced screw lengths and pitches, the resulting clamping force diminishes because of the reduced length of the actual joints. The elements of the clamping force are material, geometry, and friction. We studied the shrinking size of the screw and the methods to improve the clamping force by changing the material. We developed a micro screw using SWCH18A and SUS XM7 materials, and obtained the precision and thickness of the pitch through three-dimensional measurement. We also measured the external resistance of the micro screw by applying the Vicker's hardness test and conducted a break surface analysis using a break torque test and SEM for obtaining the break characteristics.

Keywords

SWCH18A;SUS XM7;Micro Screw;Forging;Form Rolling;Material Properties

Acknowledgement

Supported by : 산업통산자원부

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