2 0 0 0 OA 工作機械の組立における生産現場の適応メカニズムの解析
- 著者
- 太田 圭一 松原 厚 水山 元
- 出版者
- 公益社団法人 精密工学会
- 雑誌
- 精密工学会誌 (ISSN:09120289)
- 巻号頁・発行日
- vol.80, no.9, pp.856-861, 2014-09-05 (Released:2014-09-05)
- 参考文献数
- 6
Machine tool assembly is dynamic and complex because of intrinsic uncertainties in its process. Human dependent production system is often used to deal with uncertainties, but it also increases complexity. Significant research about production scheduling has been done, but effectiveness of its application to human dependent production system is not investigated enough. In addition, not only scheduling but also other countermeasures are applied to improve production performance. This paper presents a framework to analyze how machine tool assembly system responds to supervisors' instruction. The framework includes an event driven simulation, and the simulation model is generated by the facts observed at the real machine tool assembly site. The simulation results reveal conditions which enable to improve production performance effectively at machine tool assembly site.
1 0 0 0 OA NC工作機械の高速小円運動の高精度化に関する研究 : 速度制限方法の改良による精度向上
- 著者
- 鈴木 康彦 松原 厚 垣野 義昭
- 出版者
- 公益社団法人精密工学会
- 雑誌
- 精密工学会誌論文集 (ISSN:13488724)
- 巻号頁・発行日
- vol.70, no.10, pp.1266-1270, 2004-10-05
- 被引用文献数
- 5
This paper deals with controlling feed rate for small circular motion on NC machine tools. Recently new machining methods using small circular interpolation with endmills or direct taps have been used for machining cylindrical holes or tapping. Accordingly, contouring accuracy is getting more important in the new method. Decision of feed rate that influences contouring accuracy is the most important and difficult. So far the maximum feed rate for circular motion is decided according to the normal acceleration constant rule. This rule is a good way to restrict errors due to difference of stiffness between two axes because the errors are mainly proportional to normal acceleration. In the case of small circles, the rule is of no service. That is why errors are increasing as angle speed increases even if normal acceleration is constant. Therefore, the new rule to decide feed rate for small circular motion is needed. This paper analyses what is related with the errors in case of small radii and proposes a new rule to decide feed rate for small circular motion.