볼트 체결부 도난방지 안전캡 드로잉금형의 불량과 대책에 관한 연구

A study on the defects of drawing dies for anti-theft safety caps for bolted joints and on problem-solving measures

Anti-theft safety caps for bolted joints are necessary to ensure the safety of citizens and prevent theft of manholes, bridge guardrails, bulletin boards, subway safety handrails and others. Safety caps enhance the look of bolted joints, avert accidents that involve hitting the head of bolts, hamper them from coming loose by covering the head of bolts. This study focuses on press die design methods and press molding condition setting to resolve bursting and cracks in products, and on molding material selection and heat treatment technologies to boost life extension.