Robust Integrated Assembly Design and Conformance Methods for Direct Digital Manufacturing

直接数字化制造的稳健集成装配设计和一致性方法

• 批准号: RGPIN-2016-04689
• 负责人: Qureshi, Ahmed
• 金额: $ 1.68万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2016
• 资助国家: 加拿大
• 起止时间: 2016-01-01 至 2017-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=615244
• 关键词: Robust; Integrated; Assembly; Design; Conformance

The primary long term objective of the research program is to develop novel methods and tools for simulation, prediction, and validation of mechanical, functional and geometrical quality specifications of functional assemblies for direct digital manufacturing (DDM) processes with a focus on fused deposition modeling and Selective laser sintering/melting processes. Unlike subtractive manufacturing processes, DDM processes have complex, non-linear, highly coupled, time dependent behavior between the feedstock, process, part geometry, and the mechanical properties parameters (deformations, residual stresses). They also suffer from issues related to quality, capability to integrate tolerances, and validation and demonstration. Currently, there is a knowledge gap in the areas of models for simulating and predicting geometric and mechanical behavior, reliability and repeatability (material properties, dimensional accuracy) for multi-component functional assemblies. Having the capability would unlock potential future applications of additive manufacturing (AM) for manufacturing fully functional assemblies which would have an immense effect on reducing the time and cost of design and manufacturing cycle of a mechanical product. Mechanical assemblies are a critical component of machines and are required in all technological systems requiring energy/material transformations. Geometrical and tolerancing precision and predictable mechanical behavior are the most important characteristics of an assembly. Despite having the potential, the current level of maturity of AM processes do not allow direct printing of precision functional assemblies which is required for truly consolidated design elements. The proposed equipment will allow fundamental theoretical and experimental research to create accurate models for design and optimization of critical process parameters as well as multi material/multi component geometric models with a consistent build quality in terms of dimensional, geometric, kinematic, and mechanical property behavior of direct design to manufacturing of functional parts. The project culmination is expected to result into development of novel models that would significantly improve process capability of additive manufacturing process, while simultaneously reducing the waste in form of rework and rejection. It would also reduce the time spent in design and manufacturing leading to shorter cycle times. The deliverables from the process will allow design and printing of consolidated functional assemblies. The project would also train a number of HQP in the field of design and manufacturing with a focus on integrated direct digital design and manufacturing with capabilities and knowledge pf producing precision assemblies.

该研究计划的主要长期目标是开发新的方法和工具，用于模拟，预测和验证直接数字制造（DDM）工艺的功能组件的机械，功能和几何质量规格，重点是熔融沉积建模和选择性激光烧结/熔化工艺。与减材制造工艺不同，DDM工艺在原料、工艺、零件几何形状和机械性能参数（变形、残余应力）之间具有复杂的、非线性的、高度耦合的、时间依赖的行为。它们还面临与质量、整合公差的能力以及验证和演示相关的问题。目前，在用于模拟和预测多部件功能组件的几何和机械行为、可靠性和可重复性（材料特性、尺寸精度）的模型领域存在知识差距。拥有这种能力将开启增材制造（AM）的潜在未来应用，用于制造全功能组件，这将对减少机械产品的设计和制造周期的时间和成本产生巨大影响。 机械组件是机器的关键部件，在所有需要能量/材料转换的技术系统中都是必需的。几何精度和公差精度以及可预测的机械性能是组件最重要的特性。尽管具有潜力，但AM工艺的当前成熟程度不允许直接打印真正整合设计元素所需的精确功能组件。拟议的设备将允许基础理论和实验研究，以创建用于关键工艺参数的设计和优化的精确模型，以及多材料/多组分几何模型，其在尺寸，几何，运动学和机械性能行为方面具有一致的构建质量，直接设计到功能部件的制造。 该项目的高潮预计将导致开发新的模型，这将显着提高增材制造过程的过程能力，同时减少返工和拒绝形式的浪费。它还将减少设计和制造所花费的时间，从而缩短周期时间。该流程的可交付成果将允许设计和打印整合的功能组件。该项目还将在设计和制造领域培训一些HQP，重点是集成直接数字化设计和制造，具有生产精密装配的能力和知识。