Machining of Elastomers and Elastomer-Steel Composites

弹性体和弹性体-钢复合材料的加工

• 批准号: 0099829
• 负责人: John Strenkowski
• 金额: $ 24万
• 依托单位: North Carolina State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-05-01 至 2005-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0099829&HistoricalAwards=false
• 关键词: Machining; Elastomers; Elastomer; Steel; Composites

This grant provides funding to develop new methods for machining elastomers and elastomer-steel composites. Several machining methods will be investigated including high speed milling using ultra-sharp cutters, machining of elastomers with induction heated tools, and machining of cryogenically-cooled elastomers. An understanding of the tool-workpiece interaction will be developed using finite element techniques that address the large strain and highly deforming elasto-viscoplastic response of elastomers. The models will be used to determine tool forces, workpiece temperatures and deformation, and surface roughness of a machined elastomer as a function of operating conditions and tool geometry. Appropriate material property data will be developed in close collaboration with several industrial partners to characterize the elastomer response at the elevated temperatures and high strain-rates anticipated in machining. Tools and operating conditions that result in smooth surface finishes and damage-free parts will be identified, and cutting tests will be performed to verify the models based upon tool forces and surface finish.This research will lead to new understanding of the fundamental mechanisms of chip formation during machining of elastomers at both elevated temperatures and cryogenic conditions. This understanding is critical for identifying tools and operating conditions to improve the machinability of a wide range of elastomeric products such as shock isolators, sound and vibration absorbers, seals, tires, electrical and thermal insulators, footwear, tubing, and other applications requiring a highly flexible or stretchable material. As compared with traditional expensive and time-consuming molding processes, the machining methods investigated in this research promise a practical alternative for rapid production of precision elastomeric parts for a multitude of custom applications at significantly lower cost. This research also offers the potential for the development of new manufacturing processes for cost-effective and environmentally conscious tire recycling.

该补助金为开发加工弹性体和弹性钢复合材料的新方法提供资金。 将研究几种加工方法，包括使用超锋利刀具的高速铣削，用感应加热工具加工弹性体，以及低温冷却弹性体的加工。 工具工件相互作用的理解将开发使用有限元技术，解决大应变和高变形弹性体的弹粘塑性响应。 该模型将被用来确定工具的力量，工件温度和变形，加工弹性体的表面粗糙度作为操作条件和工具几何形状的函数。 将与几个工业合作伙伴密切合作，开发适当的材料性能数据，以表征弹性体在加工中预期的高温和高应变率下的响应。 将确定产生光滑表面光洁度和无损伤零件的刀具和操作条件，并进行切削试验，以验证基于刀具力和表面光洁度的模型。这项研究将导致对高温和低温条件下弹性体加工过程中切屑形成的基本机制的新理解。 这种理解对于确定工具和操作条件以改善各种弹性体产品的可加工性至关重要，例如减震器，声音和振动吸收器，密封件，轮胎，电绝缘体和热绝缘体，鞋类，管材以及其他需要高度柔性或可拉伸材料的应用。 与传统的昂贵和耗时的成型工艺相比，本研究中研究的加工方法有望以显著降低的成本为众多定制应用快速生产精密弹性体零件提供一种实用的替代方案。 这项研究还为开发具有成本效益和环保意识的轮胎回收新制造工艺提供了潜力。