Development of autonomous NC machine tool to realize NC programless machining operation for advanced manufacturing systems

开发自主数控机床，实现先进制造系统的数控无程序加工操作

• 批准号: 11650129
• 负责人: SHIRASE Keiichi
• 金额: $ 2.18万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11650129/
• 关键词: NC Machine Tool; Autonomous Machine Tool; Intelligent Machine Tool; Machining Simulator; Real Time Tool Path Generation; Virtual Copy Milling; End Milling Operation; Feed Back of Machining Condition

Required functions to develop an autonomous NC machine tool, which realizes NC programless machining operation for advanced manufacturing system, have been studied. Following research results were obtained.1. Machining simulation to predict cutting force and machining error in pre-process machiningA Virtual Machining Simulator (VMSim) has been developed for this purpose. The VMSim makes possible to predict cutting force and machining error for whole machining operation in advance. By using this function, the problem hidden in planning of tool paths and cutting conditions can be detected in pre-process machining for an autonomous NC machine tool.2. Real time tool path generation to optimize cutting conditions during in-process machiningA virtual copy milling system, which generates tool paths in real time based on copy milling principle, has been developed. The virtual copy milling system detects collision between a virtual tracer and a virtual master model, and generates tool paths to follow a sculpture surface for rough cutting during in-process machining. An NC programless machining operation can be achieved experimentally by the virtual copy milling system using conventional CNC machine tool.3. Adaptive control and feed back algorithm to avoid machining troubleA monitoring system to detect machining condition has been studied. In the monitoring system, rotational torque of both spindle and feed motors can be estimated from NC control signals based on the control theory. It is possible to detect cutting torque or cutting force without additional sensors, but further investigation is required to eliminate frictional torque of the motors.Furthermore, a feed back algorithm to avoid machining troubles has been studied. By using the virtual copy milling system mentioned above, even the axial and radial depths of cut beside the feed speed can be changed to avoid machining troubles. The effectiveness of the algorithm is verified using the VMSim mentioned above.

研究了为实现先进制造系统的数控无编程加工，开发自主数控机床所需的功能。取得了以下研究成果.在预加工过程中预测切削力和加工误差的加工仿真虚拟加工仿真器（VMSim）已开发用于此目的。VMSim可以提前预测整个加工过程中的切削力和加工误差。通过使用该功能，可以在自主数控机床的前处理加工中发现隐藏在刀具路径和切削条件规划中的问题.基于仿形铣削原理的真实的实时刀具轨迹生成技术研究开发了一个虚拟仿形铣削系统，该系统能够真实的实时生成刀具轨迹。虚拟仿形铣削系统检测虚拟仿形器和虚拟主模型之间的碰撞，并生成刀具路径以跟随雕刻表面，用于在过程中加工期间进行粗切削。实验表明，虚拟仿形铣削系统可以在普通数控机床上实现无程序数控加工.自适应控制和反馈算法避免加工故障研究了一种用于检测加工状态的监控系统。在该系统中，主轴和进给电机的转矩可以估计数控控制信号的基础上控制理论。在不增加传感器的情况下，可以检测出切削力矩或切削力，但需要进一步研究消除电机摩擦力矩的方法，并研究了避免加工故障的反馈算法。通过使用上述虚拟仿形铣削系统，除了进给速度之外，还可以改变轴向和径向切削深度，以避免加工故障。使用上述VMSim验证了该算法的有效性。

项目成果

H.Narita, K.Shirase, H.Wakamatsu, E.Arai: "Pre-process Evaluation and Modification of NC program Using Virtual Machining Simulator"Proceedings of the 2000 JAPAN-U.S.A.Symposium on Flexible Automation. 2000JUSFA13003 (2000)

H.Narita、K.Shirase、H.Wakamatsu、E.Arai：“使用虚拟加工模拟器对 NC 程序进行预处理评估和修改”2000 年日本-美国柔性自动化研讨会论文集。

白瀬敬一,近藤貴茂,岡本満,若松栄史,荒井栄司: "NCプロブラムを必要としない機械加工のための仮想倣い加工システムの開発"日本機械学会論文集. 66卷644号掲載予定. (2000)

Keiichi Shirase、Takashige Kondo、Mitsuru Okamoto、Eishi Wakamatsu、Eiji Arai：“开发不需要 NC 程序的机械加工虚拟复制系统”《日本机械工程师学会汇刊》预定出版于第 66 卷，第 1 期。 644.（2000）

白瀬敬一,近藤貴茂,岡本満,若松栄史,荒井栄司: "NCプログラムを必要としない機械加工のための仮想倣い加工システムの開発(自律型NC工作機械のための実時間工具経路生成)"日本機械学会論文集C編. 66巻644号. 1368-1373 (2000)

Keiichi Shirase、Takashige Kondo、Mitsuru Okamoto、Eishi Wakamatsu、Eiji Arai：“开发不需要 NC 程序的加工虚拟复制系统（自主 NC 机床的实时刀具路径生成）”日本学会会议录机械工程师，C 卷，第 66 卷，第 644 期。1368-1373 (2000)

Hirohisa Narita,Keiichi Shirase,Hidefumi Wakamatsu,Eiji Arai: "Pre-process Evaluation and Modification of NC program Using Virtual Machining Simulator"Proceedings of the 2000 JAPAN-U.S.A. Symposium on Flexible Automation. 掲載予定. (2000)

Hirohisa Narita、Keiichi Shirase、Hidefumi Wakamatsu、Eiji Arai：“使用虚拟加工模拟器对 NC 程序进行预处理和修改”2000 年日本-美国柔性自动化研讨会论文集（2000 年）。

白瀬敬一,近藤貴茂,岡本満,岩松栄史,荒井栄司: "NCプログラムを必要としない機械加工のための仮想倣い加工システムの開発(自律型NC工作機械のための実時間工具経路生成)"日本機械学会論文集 C編. 66巻644号. 1368-1373 (2000)

Keiichi Shirase、Takashige Kondo、Mitsuru Okamoto、Eishi Iwamatsu、Eiji Arai：“开发不需要 NC 程序的加工虚拟复制系统（自主 NC 机床的实时刀具路径生成）”日本学会论文集机械工程师，C 版，第 66 卷，第 644 期。1368-1373 (2000)