...Rajiv Malhotra; Jian Cao; Feng Ren; Vijitha Kiridena; Z. Cedric Xia; N. V. Reddy Single point incremental forming (SPIF) is plagued by an unavoidable and unintended bending in the region of the sheet between the current tool position and the fixture. The effect is a deformation of the region...

...Chen Luo; LiMin Zhu; Han Ding This paper presents a novel model for workpiece positioning analysis. Existing fixturing models may underestimate the positioning error due to neglect of the curvature of one or both contacting bodies. By using surface-to-surface signed distance function, a two-sided...

...Troy B. Rippere; Koustubh J. Rao; Gloria J. Wiens This paper presents an investigation of fixel design alternatives for active (dynamic) fixturing to be incorporated into mesoscale manufacturing systems. Using simple compliant mechanisms and components, fixels exhibiting mechanically adjustable...

...Mouhab Meshreki; Helmi Attia; József Kövecses Milling of thin-walled aerospace structures is a critical and challenging process. Available models for the prediction of the effect of the fixture on the dynamic response of flexible workpieces are computationally demanding and fail to represent...

... restrict the feasibility of inspecting flexible parts without restricting the deformations of the part and therefore require dedicated and expensive tools such as a conformation jig or a fixture to maintain the integrity of the part. To address these challenges, this paper proposes a new inspection method...

...Bing Li; Hongjian Yu; Xiaojun Yang; Ying Hu Flexibility of assembly systems is crucial to maintaining the competitiveness in the rapidly changing market. In this paper, a novel flexible fixturing system for sheet metal part assembly is presented, which utilizes parallel robots as reconfigurable...

...Yu Zheng; Chee-Meng Chew This paper presents an algorithm for optimal grasp planning and fixture synthesis. The object surface is depicted by a number of discrete points, which are used as the candidate contact points. This algorithm consists of two procedures. The first procedure selects a minimal...

...L. Eduardo Izquierdo; S. Jack Hu; Hao Du; Ran Jin; Haeseong Jee; Jianjun Shi Reconfigurable assembly systems enable a family of products to be assembled in a single system by adjusting and reconfiguring fixtures according to each product. The sharing of fixtures among different products impacts...

... element simulation has been developed using ANSYS ® with two models in symbiosis. The first model predicts the temperature of the specimen and compression fixtures due to the applied electrical current. The resulting thermal data are then input into a deformation model to observe how the temperature...

...T. Phoomboplab; D. Ceglarek Fixtures control the positions and orientations of parts in an assembly process. Inaccuracies of fixture locators or nonoptimal fixture layouts can result in the deviation of a workpiece from its design nominal and lead to overall product dimensional variability and low...

...Guo-Hua Qin; Wei-Hong Zhang; Min Wan In traditional and modern manufacturing systems, how to plan the workpiece holding is the first issue of the machining operation to be confronted for the fixture design. To ensure the machining accuracy of specific dimensions, it is necessary to develop a proper...

...Xiumei Kang; Qingjin Peng Tool feasibility is a critical issue for generating a complete fixture assembly plan to reduce production setup time. Previous fixture design systems rarely consider the assembly tool feasibility. Current methods of assembly tool feasibility analysis mainly depend...

...Z. Li; L. E. Izquierdo; M. Kokkolaras; S. J. Hu; P. Y. Papalambros Cost and dimensional variation of products are significant attributes in multistation assembly processes. These attributes depend on product∕process tolerances and fixture layouts. Typically, tolerance allocation and fixture layout...

...Mouhab Meshreki; József Kövecses; Helmi Attia; Nejah Tounsi Milling of thin-walled aerospace structures is a critical process due to the high flexibility of the workpiece. Current practices in the fixture design and the choice of cutting parameters rely solely on conservative guidelines...

... and process factors such as: part-to-fixture, part-to-part, and inter-station interactions, which represent the influences coming from both tooling errors and part errors. The incorporation of the virtual fixture concept ( Huang et al., Proc. of 2006 ASME MSEC ) and inter-station interaction leads...

... compensation and avoidance, are designed only for machine tool error reduction. This paper intends to fully utilize the engineering process information and to propose an alternative compensation strategy based on equivalent fixture error (EFE) concept that could reduce overall effect of the process errors...

.... (c) The scope is extended. Our simplified ray-shooting approach yields a grasp stability index suitable for grasp planning. Numerical examples in fixturing and grasping show the enhancement superiority. Substituting Eqs. 30 , 33 into Eq. 34 yields 35 ξ i ⩽ ξ ¯ i where 36...

...Guohua Qin; Weihong Zhang; Zhuxi Wu; Min Wan Control of workpiece machining error (WME) is a key concern in the design of a fixture system. In this paper, source errors, which are categorized into workpiece-fixture geometric default and workpiece-fixture compliance, are systematically investigated...

... in the workpiece-fixture system. Therefore, the present contact forces in each clamping step are solved incrementally in terms of contact forces of the precedent step by means of the principle of the total complementary energy. Furthermore, based on the fact that the variation of contact forces from one step...

... be of limited value to the LAAG fixture designer. This is due to three fundamental reasons. Presently very little is known with regard to the actual mechanical properties of Dymax® 602 and the quasi-static deformation behavior of LAAG joints bonding a sapphire gripper pin to a machined steel surface. What...