Failure analysis of a cold-extrusion punch to enhance its quality and prolong its life
Resource
Journal of Materials Processing Technology 105: 134-142
Journal
Journal of Materials
Journal Issue
105
1
Pages
Processin-g
Date Issued
2000
Date
2000
Author(s)
Lee, Yi-Che
Abstract
A cold-extrusion punch used to manufacture sockets undergoes severe impact loading and severe wear in the metal forming process. Failure in the cold-extrusion punch frequently occurs and is difficult to avoid. Owing to the complicated manufacturing process and the lack of service history of the cold-extrusion punch, detecting the major causes of the punch failure is difficult. Therefore, this study analyzes the major causes of the failure of a cold-extrusion punch by initially examining the mechanical properties of the cold-extrusion punch to identify defects in its related performance. Eliminating such defects is necessary to enhance the quality of the cold-extrusion punch. To determine the major causes of failure of the cold-extrusion punch, the characteristics of the failure are compared with those of well-known failure mechanisms, including the macro- and micro-characteristics of failure mechanisms. By closely examining the results of the mechanical properties and the results of the failure analysis of a cold-extrusion punch, this study proposes an effective method to avoid punch failure and prolong the punch life.
Other Subjects
Cold working; Failure analysis; Loads (forces); Metal extrusion; Wear of materials; Cold-extrusion punches; Punch presses
Type
journal article
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