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首页> 外文期刊>International Journal of Machine Tools & Manufacture: Design, research and application >6+X locating principle based on dynamic mass centers of structural parts machined by responsive fixtures
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6+X locating principle based on dynamic mass centers of structural parts machined by responsive fixtures

机译：6 + X基于响应式固定装置机械加工动态质量中心的定位原理

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AbstractAdaptive machining with responsive fixtures is an effective way to release and eliminate deformation during the machining process of large-scale structural parts. While a proper locating principle is a key challenge for the responsive fixture based machining due to its two contradictory requirements of maintaining the machining datum and deformation releasing sufficiently. For traditional machining methods, locators are placed as far as possible from each other to maintain workpiece stability, which would significantly limit the release of workpiece deformation. In order to address the issue mentioned above, different from traditional locating method, a novel 6+X locating principle is proposed in this paper, where the workpiece is divided into a fixed region and a floating region to facilitate the new locating principle. The fixed region is optimized by considering dynamic mass centers with a Genetic Algorithm to maintain workpiece stability, and the 6° of freedom of the workpiece are restrained by the fixed region to keep machining datum. The floating region is supported by X floating units so as to keep the workpiece stable during machining process, while the floating units can adjust the workpiece posture in accordance with the machining deformation during the machining intervals. Algorithm experiments are applied to verify the convergence of the proposed optimization model. Finally, a case study with real machining experiment is carried out to verify the proposed method.Highlights?A novel 6+X locating principle is proposed for responsive fixture based machining.?Fixed region and floating region are defined for location and deformation releasing.?The fixed region of workpiece is optimized by using a GA.?Machining datum and sufficient deformation releasing are satisfied simultaneously.?Machining deformation control is significantly improved by experiment verification.]]>
机译：<！[CDATA [ 抽象 具有响应夹具的自适应加工是在大规模结构的加工过程中释放和消除变形的有效方法部分。虽然适当的定位原理是基于响应夹具的主要挑战，其两个矛盾的加工由于其具有足够的加工基准和变形释放的两个矛盾要求。对于传统的加工方法，定位器尽可能彼此放置以维持工件稳定性，这将显着限制工件变形的释放。为了解决上述问题，与传统定位方法不同，本文提出了一种新颖的6 + X定位原理，其中工件被分成固定区域和浮动区域，以便于新的定位原理。通过考虑具有遗传算法的动态质量中心来优化固定区域以维持工件稳定性，并且通过固定区域限制工件的6°的自由度以保持加工基准。浮动区域由X浮动单元支撑，以便在加工过程中保持工件稳定，而浮动单元可以根据加工间隔期间根据加工变形调节工件姿势。应用算法实验以验证所提出的优化模型的收敛性。最后，进行了具有真实加工实验的案例研究以验证提出的方法。 突出显示 ？ 提出了一种新颖的6 + X定位原理，用于基于响应夹具的加工。 ？ 定义了固定区域和浮动区域，用于位置和变形释放。 ？ 固定区域通过使用GA优化工件。 ？ 加工基准和足够的变形释放同时满足。 ？ 通过实验验证显着提高了加工变形控制。 ]]>

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