Wear and blanking performance of an AlCrN PVD coated punch.

• Дата: 2012
• Автори: Çöl, M., Kir, D., Erişir, Erişir
• Формат: Стаття
• Мова: English
• Опубліковано: Фізико-механічний інститут ім. Г.В. Карпенка НАН України 2012
• Назва видання: Фізико-хімічна механіка матеріалів
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/139776
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Wear and blanking performance of an AlCrN PVD coated punch. / M. Çöl, D. Kir, E. Erişir // Фізико-хімічна механіка матеріалів. — 2012. — Т. 48, № 4. — С. 89-94. — Бібліогр.: 14 назв. — англ.

Blanking of sheet steels is one of the most frequently used processes in the manufacture industry. During blanking processes, the wear of punch occurs due to the cycled contact of opposite surfaces. Therefore, the punch is exposed to high stresses and requires high resistance against wear. When worn tools are used, the tool surface directly affects the quality of sheet products and causes some surface defects. PVD coating of punch with a surface layer of improved hardness and low friction may reduce wear. The aim of this study is to characterize tool wear of AlCrN coated punch used for sheet steel blanking. The worn punch surfaces were examined by scanning electron microscopy. Results showed that wear take place due to abrasion, adhesion, and delamination along sliding flank surfaces. Edge rounding and fracture of cutting edges were also observed. After blanking tests, the tool wear volume of punches and burr height of blanked parts were also measured. The wear volumes were determined by means of profile measurements of the worn punch carried out after completion of a large amount of blanked parts.