关键词: 大型对称自由曲面, 对称加工, 碰撞, 同步误差

Abstract:

In order to enhance the machining efficiency of a large symmetrical freeform surface, this paper put forward a new concept of symmetrical machining (SM), analyzed the characteristics of SM. Taking a 4-axis SM machine as an example, this paper introduced the design of SM machine, and investigated the realization mechanism of SM. Based on the above research work,a 4-axis SM machine has been developed in China, and its efficiency on machining ship model surface is 85% higher than that of the traditional 4-axis single-cutter machine. More over, the design of SM machine save one set of servo driving system, and thus reduce the machine cost. 

Key words: large symmetrical freeform surface, symmetrical machining, collision, synchronization error