Contour Crafting: A Novel Rapid Prototyping Technique

Khoshnevis 9634962作为一种新兴技术，快速成型正在革新工业的各个领域，为设计和制造具有更短交货期和低成本的上级质量产品创造了巨大的机会。许多研究人员和实践者已经探索了选择性光固化、选择性烧结、粉末上的液滴沉积和3D打印等方法。使用快速成型技术的主要技术限制是零件的表面光洁度差、尺寸有限和尺寸收缩。 对制造大型零件、上级表面质量和更好的机械性能有强烈的需求。 拟议的研究项目将开发轮廓工艺（CC）快速原型系统，这是一种新的增材制造技术，可以产生非常光滑的表面光洁度。 轮廓工艺过程使用计算机控制成型机构的抹刀运动，以创建平滑和精确的平面和自由曲面。 这是一种混合方法，它结合了用于形成物体表面的挤出过程和用于构建物体芯的填充过程。该研究项目在理论与实验之间取得了平衡，将为快速成型行业提供有价值的发现。

Khoshnevis 9634962 As an emerging technology, rapid prototyping is revolutionizing every sector of industry, creating great opportunities to design and manufacture products of superior quality with shorter lead-time and low costs. Methods like selective photocuring, selective sintering, droplet deposition on powder,and 3D printing have been explored by many researchers and practitioners. The major technological constraints for using the rapid prototyping technologies are poor surface finishing, limited size, and dimensional shrinkage of parts. There is a strong need for fabricating large parts, superior surface quality, and better mechanical properties. The proposed research project will develop a Contour Crafting (CC) rapid prototyping system, a new additive fabrication technology, which can produce extremely smooth surface finishing. The Contour Crafting process uses computer control of troweling motion of a forming mechanism to create smooth and accurate planar and free-form surfaces. This is a hybrid method that combines an extrusion process for forming the object surfaces and a filling process to build the object core. The research project has a balance between theory and experiment, and will provide valuable findings for the rapid prototyping industry.