ABSTRACT

Manufacturing systems in the present industry must be flexible and allow fast reconfiguration to supply increasing demands for diversified products. Thus, a standard model for data exchange should be employed in a manner that the same data can be interpreted and used in different machines. In this work the ISO14649 (STEP-NC) standard is used to fulfil this requirement. Also, CNCs must be easily reprogrammable and able to reuse code for different tasks to reduce programming time. The contribution of this work is presenting a manufacturing system which is compliant to IEC 61499 and to STEP-NC, integrating them to fulfil requirements of interoperability and flexibility. A system, named CNC-C², was developed (Computerised Numeric Control Compliant to STEP-NC and Compliant to IEC61499) with several software tools and integrated them to a machining hardware, also developed and presented in this paper. Experiments were performed in a test workpiece including STEP-NC compliant drilling, planar facing, linear and circular cutting features while using IEC61499 Function Blocks networks to perform the computational task. CNC-C² achieved unprecedented interoperability and flexibility thanks to its compliance to Function Blocks and STEP-NC standards.

摘要

当前行业中的制造系统必须具有灵活性，并允许快速重新配置以满足对多样化产品日益增长的需求。因此，数据交换的标准模型应该以相同的数据可以在不同的机器上解释和使用的方式被采用。在这项工作中，ISO14649 (STEP-NC) 标准用于满足此要求。此外，CNC 必须易于重新编程，并且能够为不同的任务重复使用代码以减少编程时间。这项工作的贡献是提出了一个符合 IEC 61499 和 STEP-NC 的制造系统，将它们集成在一起以满足互操作性和灵活性的要求。一个名为 CNC-C ^{2 的系统}, 是使用多种软件工具开发的（计算机数字控制符合 STEP-NC 和符合 IEC61499），并将它们集成到加工硬件中，本文也进行了开发和介绍。在使用 IEC61499 功能块网络执行计算任务的同时，在测试工件中进行了实验，包括 STEP-NC 兼容钻孔、平面端面、线性和圆形切削特征。由于符合功能块和 STEP-NC 标准，CNC-C ²实现了前所未有的互操作性和灵活性。