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Design to Specifications - A Strategy for Specification-Based Machine Design

机译：按规格设计-基于规格的机器设计策略

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摘要

Increasingly integrated systems and the use of innovative lightweight structures enabled an evolution of the machine tool industry to products with very high dynamic performance and precision. For the development of modern machine tools, simulation has continuously gained in importance. However, due to increasing pressure to reduce the time-to-market of new products, an efficient work-flow for the integration of simulation in the design process is crucial.In this contribution, a newly developed design process named Design to Specifications (DtS) is presented. DtS places the focus on productivity and accuracy specifications for a machine tool and enables the design of structures that precisely meet the specifications. In a first step, requirements on structural properties are regarded. The requirements on dynamic capabilities as jerk or acceleration limitations are derived from productivity specifications, using computer aided manufacturing tools, and reference workpieces of choice. From requirements on dynamics and accuracy specifications, the required position controller bandwidth is derived, from which a minimum critical system eigenfrequency is deduced that allows a design engineer to select machine parts and to estimate proper dimensions for critical components. After having designed a particular structure, a virtual prototype is created that allows a time-saving verification of the dynamic capabilities of a machine tool by means of calculations in frequency domain. The calculation of maximum contour errors by means of weighted frequency response functions of the dynamic tracking error is presented.In summary, DtS enables an efficient design or modification of machine tool structures using an effective application of control theory estimations and verification using virtual prototypes.
机译：越来越多的集成系统和创新的轻型结构的使用，使机床行业向动态性能和精度极高的产品发展。对于现代机床的发展，仿真已变得越来越重要。然而，由于减少新产品上市时间的压力越来越大，因此将仿真集成到设计过程中的有效工作流程至关重要。在此贡献中，新开发的设计过程称为Design to Specification（DtS）。 ） 被呈现。 DtS专注于机床的生产率和精度规格，并能够设计精确满足规格的结构。第一步，考虑对结构特性的要求。对动态性能（如加速度或加速度限制）的要求是从生产率规范（使用计算机辅助制造工具）和所选参考工件得出的。从动力学和精度规范的要求中，得出所需的位置控制器带宽，从中得出最小的关键系统本征频率，允许设计工程师选择机器零件并估算关键组件的适当尺寸。在设计了特定的结构之后，将创建一个虚拟原型，该原型可以通过频域中的计算来节省时间，以验证机床的动态性能。通过动态跟踪误差的加权频率响应函数来计算最大轮廓误差。总之，DtS通过有效地应用控制理论估计值和使用虚拟原型进行验证，可以对机床结构进行有效的设计或修改。

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