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장성호,신장모,최이천,서대교 성균관대학교 기계기술연구소 2001 성균관대학교 논문집 기계기술편 Vol.4 No.1
The limiting drawing ratio(LDR) under uniform beating of blanks was measured at the various temperature ranges between 25℃ and 250℃ by using two different blank shapes, square and circular blanks, and six different blank sizes with the drawing ratios(DR) of 2.4 to 2.7. The orgaric coated steel skeets(SCP3CJ-3K/3K) of 0.7mm thickness were used. The maximum drawing ratio at 200℃ reached 1.2 times of that at room temperature, and the drawing depth without fracture reached 1.8 times. The higher temperature was adopted, the more stable and uniform thickness strain distribution was observed.The limiting drawing ratio(LDR) under uniform beating of blanks was measured at the various temperature ranges between 25℃ and 250℃ by using two different blank shapes, square and circular blanks, and six different blank sizes with the drawing ratios(DR) of 2.4 to 2.7. The orgaric coated steel skeets(SCP3CJ-3K/3K) of 0.7mm thickness were used. The maximum drawing ratio at 200℃ reached 1.2 times of that at room temperature, and the drawing depth without fracture reached 1.8 times. The higher temperature was adopted, the more stable and uniform thickness strain distribution was observed.