【摘要】 使用数控机床加工复杂直线段轨迹时,由于受到弓高误差和加速度的限制,直线段转接位置的速度通常较低,显著影响加工效率。首先介绍了直线段转接角的概念,并研究了基于二分法的最优转接角计算方法;为了保证加工时实际转接角等于计算出的最优转接角,提出了基于逆推减速的直线段转接速度规划算法;最后将算法应用在某数控系统上,并设计了由多段直线段组成的复杂轨迹。9个转接角的转接速度最大提高了464.18%、平均提高了227.85%,显著提高了直线段的转接速度。更多还原

【Abstract】 When machining straight lines using the machining center,the machining velocity is generally slow at the transition position due to the restriction of chord error and acceleration,thus influencing the machining efficiency greatly.It introduces the concept of transition angle at first,as well as calculation method for the optimal transition angle based on dichotomy.Then,straight lines transition velocity planning algorithm based on backstepping deceleration was presented in order to guarantee the actual transition angle equals to the calculated optimal transition angle.At last,the transition velocity planning algorithm was applied on a numerical control system,and a complicated machining trajectory which was composed by several straight lines designed.Transition velocity of the 9 transition angles had a maximum increasement of 464.18% and an averagely increasement of 227.85%,which increased the transition velocity greatly.更多还原