5축 절삭가공기 교육 중 2NC 헤드의 고강도 알루미늄을 적용한스핀들 하우징의 극한 조건의 진동해석에 관한 연구 (A Study on the Vibration Analysis of Spindle Housing with High Strength Aluminum of 2NC Head in Five-axis Cutting Machine Training)

서지정보

· 발행기관 : 한국실천공학교육학회
· 수록지 정보 : 실천공학교육논문지 / 14권 / 1호 / 119 ~ 125페이지
· 저자명 : 이지웅

초록

교육용으로사용되는피삭재(소재)는SM20C,Al6061,아크릴등의소재를사용한다. SM20C 소재는탄소강으로서자격증시험및기능경기대회에서많이사용되지만산업현장에서도많이사용된다. Al6061 소재는탄소강에비하여경도가낮아지고전성(연성)이강한소재이기에공구의구성인선이많이발생하는소재라고한다.아크릴소재를이용하여학생들에게실습지도하면어느부분에서과다절삭으로인하여진동이발생하고공구의파손이발생하는소재이다.이러한과정에서5축장비인2NC헤드에게가해지는충격이정밀도제어에는어느정도영향을줄수있는지알아본다. 5축장비의가장취약한부분은AC축을제어하는헤드가가장약한부분이라할수있다.이부분의정밀도및누적공차가발생할경우모든제품의정밀도가떨어지는현상이발생한다.따라서 2NC헤드의 핵심적인 부분, 스핀들 하우징은 Al7075 T6(미국 알코아사) 소재를 사용하여 진행하였다. 이 소재에서 작용되는진동및절삭과정에서힘을극한조건에서유한요소해석으로적용되는값을밝혀내고자해석을진행하였다.이러한해석데이터를활용하여학생들이5축절삭보다5축가공기의구조를보고이해하는데도움이되기를기대한다.

영어초록

Materials used for education are materials such as SM20C, Al6061, and acrylic. SM20C materials are carbon steel and are oftenused in certification tests and functional competitions, but are also widely used in industrial sites. The Al6061 material is said to bea material that has lower hardness and stronger flexibility than carbon steel, so it is a material that generates a lot of compositionalselection of tools. If students are taught practical training using acrylic materials, vibration occurs due to excessive cutting in someparts and damage to the tool occurs. In this process, we examine to what extent the impact on the 2NC head, which is a five-axisequipment, can affect precision control. The weakest part of the five-axis equipment can be said to be the weakest part of the headthat controls the AC axis. When the accuracy and cumulative tolerance of this part occur, the accuracy of all products decreases.
Therefore, the core part of the 2NC head, the spindle housing, was carried out using an Al7075 T6 (Alcoa, USA) material. In the process of vibration and cutting applied to this material, the analysis was conducted to find out the value applied to the finite elementanalysis under extreme conditions. It is hoped that this analysis data will help students see and understand the structure of 5-axismachining rather than 5-axis cutting.

참고자료

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