인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
DBpia AI
AI 에이전트
AI 아이디어
AI 리더
AI 뷰어
Citeasy
크롬 서지관리 다운로드
개인구독
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지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
피인용 0
초록·키워드
Cutting process has been automated due to progress of CNC and CAD/CAM, but polishing process has been only depended on experiential knowledge of expert. Polishing work for a curved surface die demands simple and repetitive operations but requires much time for its high precision. Therefore it is operated in the handiwork by skilled worker. However the workers intend to avoid gradually polishing work because of the poor environments such as dust and noise. In order to reduce the polishing time and solve the problem of shortage of skilled workers, it has been done some research for an automation of polishing. To automate the polishing process, a 2 axes polishing robot which is attached to a 3 axes machining center has been developed by our previous research. This automatic polishing robot is able to keep the polishing tool normal on the curved surface of die. Therefore its performance of polishing is improved because of always keeping the tool normal on the surface. In this paper, the smaller sized polishing robot is developed to improve polishing performance. And the controller for 2 axes polishing robot is developed. The controller is composed of TMS320C31 with high speed which is 40-ns instruction cycle time, RAM memory with 64K words, digital input with 64 bits, digital output with 32 bits, and D/A converter with 4 channels, which is 12 bits resolution. To evaluate polishing performance of this developed robot, polishing experiment for shadow mask was carried out. In the processes of a die manufacturing, polishing is done to remove tool marks and improve the smoothness and flatness of die surfaces. Cutting process has been automated due to progress of CNC and CAD/CAM, but polishing process has been only depended on experiential knowledge of expert. When the polishing operations are done by the skilled workers, polishing takes a long time to obtain the required accuracy. It has been a major problem consuming 30 ~ 40 % of the total die manufacturing time[1,7,8,11]. However some workers intend to avoid gradually polishing work because of the poor environments such as dust and noise. To improve the productivity and solve the shortage of the skilled workers, it is required to develop an automated polishing system using manipulators[3,4,5]. Thus, in the previous study, the polishing robot with 2 degrees of freedom was developed, which has a pneumatic system and was attached to a machining center with 3 degrees of freedom. The developed automatic polishing system has 5 degrees of freedom being able to polish a curved surface die[1,6,9]. However, the polishing robot was big and heavy, it could not take a more wide workspace and then it affected badly a polishing work. Therefore, in this study, the smaller and lighter polishing robot than the previous has been designed to improve defects due to that. Also, a cheaper controller has been designed for commercializing. Automation of polishing is expected to reduce a steps of polishing processes and improve a roughness and waviness. And the best merit of this automatic polishing system is that the polishing robot with 2 degrees of freedom is attached to the machining center with 3 degrees of freedom using generally in industry.
본문·목차
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최근 본 자료 전체보기
UCI(KEPA) : I410-ECN-0101-2013-569-003201420
