CAJ | 학술논문

通过对刀具轨迹有效性的分析,将刀具轨迹规划分为曲面上曲线族的选择和有效合理排布方式的设计两个方面.以此为基础,针对数控加工中心的高速加工特性,提出一种等参数螺旋刀具轨迹生成方法.该方法以减少抬刀、路径转接为目的,并综合考虑刀具轨迹几何与运动力学性能.首先以等参数线型轨迹为基础,生成等参数环形轨迹,进而以对角曲线连接相邻路径,构造能够实现连续切削的等参数螺旋轨迹.仿真试验表明该方法,简单实用,而且避免了轮廓偏置中的干涉检测,特别适用于自由曲面的高速数控加工.
통과대도구궤적유효성적분석,장도구궤적규화분위곡면상곡선족적선택화유효합리배포방식적설계량개방면.이차위기출,침대수공가공중심적고속가공특성,제출일충등삼수라선도구궤적생성방법.해방법이감소태도、로경전접위목적,병종합고필도구궤적궤하여운동역학성능.수선이등삼수선형궤적위기출,생성등삼수배형궤적,진이이대각곡선련접상린로경,구조능구실현련속절삭적등삼수라선궤적.방진시험표명해방법,간단실용,이차피면료륜곽편치중적간섭검측,특별괄용우자유곡면적고속수공가공.
By analysis of the validity of tool path, tool path planning is divided into two processes, the choice of curves on surface and the design of effective and rational path arrangement. On this basis, a spiral topology toolpath for continuous cutfing is developed in order to reduce the number of interruptions and rapid traversals during high-speed machining (HSM) process. Based on the isoparametric toolpath, the contour-parallel isoparametric path is firstly created, and then a spiral path is generated as a kind of diagonal curve between the isoparametric offset curves. Experimental results demonstrate that the proposed method is straightforward and avoids the self-intersection of the toolpath, especially suitable for HSM.