Generation of Velocity Profiles with Speed Limit of Each Axis for High-Speed Machining using Look-Ahead Buffer

作     者：Lee, Cheol-Soo 

作者机构：Sogang Univ Dept Mech Engn Seoul 121742 South Korea 

出 版 物：《INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING》 (精密工程与制造业国际杂志)

年 卷 期：2010年第11卷第2期

页      面：201-208页

核心收录：

学科分类：08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0802[工学-机械工程] 081102[工学-检测技术与自动化装置] 0811[工学-控制科学与工程] 

主　　题：Velocity profile Look-ahead Algorithm High-speed Machining Small line segment Speed Limit 

摘      要：An efficient look-ahead algorithm to generate velocity profiles is presented in this paper. Algorithm allows for a nonzero starting point velocity and end point velocity of every line segment to increase machining productivity. The paper considers the intelligence of look-ahead to achieve faster machining speed, along with required accuracy. Speed limitation of a specific axis and the direction change of an axis are newly added to the constraints of the velocity profile problem. This paper solves graphically the problem of generating velocity profiles and derives the equations for representing the velocity profile. A method to manage the look-ahead buffer is also proposed. To generate velocity profiles using the look-ahead buffer, three phases are proposed. Phase I determines the velocity conditions such as the maximum velocity, starting point velocity and end point velocity In phase 2, velocity profiles are generated independently Phase 3 handles the change of the start or end point velocity. This phase 3 is repeated until all adjacent point velocities are the same. The proposed method was utilized in the manufacturing field to engrave aluminum tire molds. It was demonstrated that this method contributes to an increase of the machining accuracy and a reduction of the production time.