Development of prototype of CNC device aiding decision making of multi skilled worker

经过两年的研究，本研究的目标已经圆满实现。主要研究成果如下：1.嵌入式调度功能和刀具轨迹生成功能的数控设备体系结构提出了一种新型的机床数控设备，并对其体系结构进行了规划，以便于多技能工人进行辅助决策。该数控装置为加工人员提供了排程功能和刀具轨迹生成功能。通过调度结果，工人可以知道他的决策对整个制造系统的影响。此外，工人可以在没有CAM系统的情况下更改切割计划。分散调度方法的改进递归传播法是申请人提出的一种用于分散调度的信息交换协议，它被改进为辅助多技能人员的决策。这一改进与基于调度理论的候选调度估计有关。提出了调度问题、制造环境和资源模型的格式作为系统的接口之一，以实现与工人的交互。为了在不借助CAM系统的情况下生成加工自由曲面的刀具轨迹，提出了一种新的刀具轨迹生成方法。提出的方法主要用于计算加工中控制刀具位置所需的产品的偏置位置。工人可以更改由所提议的数控设备支持的工艺计划。

The objectives of this research have been successfully attained after two years of research. The major research results obtained are as follows ;1. Architecture of CNC device embedded scheduling function and tool path generating functionA new type CNC device for machine tools is proposed and the architecture of the CNC devices is planned in order to aid decision-making by multi skilled workers. The proposed CNC device provides scheduling function and tool path generating function for the workers. The worker can know an influence for whole manufacturing system caused by his decision-making through the scheduling results. Furthermore the worker can change the cutting plan without CAM systems.2. Improvement of decentralized scheduling methodRecursive propagation method, which is an information exchanging protocol for the decentralized scheduling proposed by the applicant, is improved to aid the decision-making by the multi skilled-workers. The improvement is related to an estimation of candidate schedule based on scheduling theory. The formats of the scheduling problem, manufacturing environments, and resources model are proposed as one of the interfaces of the proposed system in order to interact the workers.3. Immediate offset methodA new tool path generation procedure is proposed in order to generate the tool path for machining of free form surfaces without aid of CAM systems. The proposed method is focused on calculations for offset position of a product required to control the tool position in machining. The workers can change the process plans supported by the proposed CNC devices.