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首页> 外文会议>SME Composites Manufacturing amp; Tooling 2000 Conference amp; Tabletop Exhibits, 2000, Feb 23-25, 2000, Newport Beach, California >USE OF SENSORS AND SIMULATIONS FOR STRATEGIC CONTROL OF LIQUID COMPOSITE MOLD FILLING PROCESS
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USE OF SENSORS AND SIMULATIONS FOR STRATEGIC CONTROL OF LIQUID COMPOSITE MOLD FILLING PROCESS

机译：传感器和模拟技术对液态复合模具填充过程的策略控制

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摘要

Liquid Composite Molding (LCM) are processes in which a fiber preform is placed in a mold and a thermoset resin is injected into the mold cavity to form a fiber reinforced composite part. For complicated mold shapes, the engineer has to make decisions about the resin injection pressure, flow rate, location of gates and vents to achieve a high quality part without any dry spots. Over the last ten years, we have developed a virtual manufacturing simulation, LIMS (Liquid Injection Molding Simulation) of the infiltration of the resin into the fiber preform that can aid the engineer in arriving at such decisions. Although this has helped in reduction of time and cost in prototype development, inherent variabilities in material and process parameters continue to challenge the engineer in reducing the unacceptable parts. An on-line strategic controller with in-situ sensor data can influence the resin flow pattern during mold filling and drive the process towards successful completion. LIMS usefulness in development of such controllers, to take corrective actions when a disturbance such as change in fiber volume fraction or unplanned racetracking is detected by the sensors, will be demonstrated with a case study.
机译：液体复合材料成型（LCM）是将纤维预成型件放入模具中，然后将热固性树脂注入模腔中以形成纤维增强复合材料零件的过程。对于复杂的模具形状，工程师必须决定树脂注射压力，流速，浇口和通风口的位置，以实现没有任何干燥斑点的高质量零件。在过去的十年中，我们开发了虚拟制造模拟，即LIMS（液体注射成型模拟），用于将树脂渗透到纤维预成型坯中，以帮助工程师做出此类决定。尽管这有助于减少原型开发的时间和成本，但材料和工艺参数的内在差异继续挑战工程师减少不合格零件的数量。具有原位传感器数据的在线策略控制器可以影响模具填充过程中的树脂流动方式，并推动该过程成功完成。案例研究将证明LIMS在开发此类控制器时的实用性，以在传感器检测到诸如纤维体积分数变化或计划外的赛道跟踪等干扰时采取纠正措施。

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