You can read online compliant mechanisms design of flexure hinges here in pdf, epub, mobi or docx formats. This book presents methods both of classifying and of modeling compliant mechanisms, actuators, and sensors according to diverse criteria, enabling or simplifying their selection, modeling and. After comprehensively describing stateoftheart methods for designing compliant mechanisms, it provides a new topology optimization method for finding new flexure hinges. Effect of flexural hinges in the design of a 2 dof compliant. Another compliant mechanism example is the one of figure 1. Parametric study of circular micro flexure hinge design. Instead of the entire mechanism only its significantly deformed domain are modeled by 3d structural solids. Compliant mechanisms, unlike conventional rigid body mechanisms consisting of rigid members and classical joints, represent a single piece flexible structure which uses elastic. A design method for flexurebased com pliant mechanisms. This book covers various topics regarding the design of compliant mechanisms using topology optimization that have attracted a great deal of attention in recent decades. Pdf a compliant mechanism gains its mobility fully or partially from the compliance of its elastically deformable parts rather than from.
Solid state model of the two investigated compliant guiding mechanisms with two different shape versions for the coupler exemplarily shown with circular flexure hinges. Built a compliant mechanism that can replace the hinge joint for rotational motion between two objects. Flexure hinges hold several advantages over classical rotation joints, including no friction losses, no need for lubrication, no hysteresis, compactness, capacity to be utilized in smallscale applications, ease of fabrication, virtually no assembly, and no required maintenance. The basis of this project was to model, design, and test several planar compliant mechanisms aimed at amplifying the input mechanical motion. A compliant mechanism gains its mobility fully or partially from the compliance of its elastically deformable parts rather than from conventional joints. Productions processes many, new, different enabled by compliant designs 3. Compliant mechanism an overview sciencedirect topics. A design method for flexurebased com pliant mechanisms on. See more ideas about digital fabrication, mechanical design and paper structure. Flexure hinge design is important because it provides a means for motion actuation in a mechanism. The microgripper is designed, and a comparison study on stress and displacement is done by varying the hinge parameters such as the hinge radius, web thickness, position of flexure hinge, and radius of curvature of hinges. Relations between design parameters and magnification ratio, and the optimal values for the parameters to achieve a longer stage displacement are presented.
For fourbar and multi bar compliant mechanisms, the advantages of using long beam joints compared with film or notch joints in terms of the achievable range of motion are described in the literature. Aug 03, 2001 a concise survey of compliant mechanisms from fundamentals to state of theart applications this volume presents the newest and most effective methods for the analysis and design of compliant mechanisms. Optimal design of a flexurehinge precision stage with a. Due to their advantages, compliant linkage mechanisms are state of the art in high precise motion systems for guiding and transfer tasks. The proposed analytical model gives a new viewpoint on the design of circular flexure hinge based compliant mechanisms. This paper presents design and analysis of flexure mechanism.
Other techniques are being conceived to design these mechanisms. Lever mechanisms are usually used to enlarge output displacements in precision stages. On mechanical properties of planar flexure hinges of compliant. Investigation of circular flexural hinge used in compliant. On the design methodology of flexurebased compliant. Design of flexure hinges crc press book flexure hinges hold several advantages over classical rotation joints, including no friction losses, no need for lubrication, no hysteresis, compactness, capacity to be utilized in smallscale applications, ease of fabrication, virtually no assembly, and no required maintenance. Design of flexure hinges provides practical answers and directions to the needs of efficiently designing, analyzing, and optimizing devices that include flexure hinges. After comprehensively describing state of theart methods for designing compliant mechanisms, it provides a new topology optimization method for finding new flexure hinges. Researchers have an option of selecting the most suitable flexure hinge compliance equations to calculate the kinetostatics of the stage. In this work, the dynamic characteristics of compliant mechanisms consisting of flexure hinges are approximated by a novel approach based on the transformation of the compliant mechanism into an elastic multibody system. The rotation center and rotational angle of each flexure hinge are corrected by means.
Jul 28, 2015 this paper proposes a topology optimization framework to design compliant mechanisms with a mixed mesh of both beams and flexure hinges for the design domain. Rigidbody mechanism a and flexurebased compliant mechanism b mechanisms and systems. A compliant microgripper with 2 dof is designed with different types of flexural hinges like circular, rectangular and corner fillet along with the variations of various parameters. Compliant mechanisms download ebook pdf, epub, tuebl, mobi. The designed microgripper is analysed for different high resilience materials to test its compliance capability.
A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. A concise survey of compliant mechanismsfrom fundamentals to stateoftheart applications this volume presents the newest and most effective methods for the analysis and design of compliant mechanisms. A flexure is a flexible element or combination of elements engineered to be compliant in specific degrees of freedom. Jun 01, 2009 kinetostatic modeling of 3rrr compliant micromotion stages with flexure hinges the kinetostatic model has closedform equations and flexure hinge compliances are one of the variables in the model. It strives to bridge the gap between intuition and mathematical analysis in flexure mechanism design. Modeling and design of flexure hingebased compliant mechanisms.
Moreover, if the stage should have designed a hollow type maintaining a compact size, it is more difficult to arrange the pzt actuators and the flexure amplification mechanisms. Compliant mechanisms manufactured in a plane that have motion emerging from said plane are known. The hinges are often represented in finite element analysis by. Therefore,especially prismatic flexure hinges with basic cutout geometries are used as revolute joints. Flexure bearings serve much of the same function as conventional bearings or hinges in applications which require angular compliance. Three sets of generic design equations for the three types of flexure hinges are. Download pdf the art of flexure mechanism design free. Notable aspects are the overall stiffness, the stress for each flexure hinge, the parasitic displacement at the end. Circular flexural joint was manufactured by using al 6061 t6 material and experimental setup. The result describes the maximum stiffness properties.
Jan 23, 2010 in this paper, a new twodimensional, compliant, monolithic piezoactuated microgripper using flexure hinges is reported. Both these kinds of mechanisms offer a rich mine of innovative and elegant design solutions for a wide range of applications. Design of flexure hinges flexure hinges hold several advantages over classical rotation joints. Hybrid compliant mechanism design using a mixed mesh of. Flexure hinges, compliant mechanisms, backlash, actuatorcross sensitivity, parasitic coupling, precision motion. Static deformation modeling and analysis of flexure hinges.
Optimal design of proportion compliant mechanisms with corner. Compliant mechanisms offer the highprecision coupled with uhv, radiation and. Pdf on mechanical properties of planar flexure hinges of. Any systematic flexure design exercise has to be based on performance measures. Dec 14, 2007 compliant mechanism is a monolithic device that utilizes flexible elements, instead of pins, to transform the input to a useful output position, and flexure hinge is an integral part of a compliant mechanism. A precision stage employing a lever mechanism and flexure hinges is analyzed theoretically, with bending in the lever considered. Adaptive compliant mechanisms, topology optimization, shape optimization, flexure hinges, adaptive gripper. Compliant systems are characterized by complex deformation and motion behavior, which complicates both their modeling and ultimately their application.
Part count reduced by having flexible parts instead of springs, hinges 2. A flexure bearing is a category of flexure which is engineered to be compliant in one or more angular degrees of freedom. It contains readytouse plots and simple equations describing several flexure types for the professional that needs quick solutions to current applications. The synthesis of compliant mechanisms yield optimized topologies that combine several stiff parts with highly elastic flexure hinges. Such compliant mechanisms use flexure hinges which are slender, flexible portions that bend and enable relative rotation of two adjacent rigid links instead of classical joints. Dec 27, 2002 flexure hinges hold several advantages over classical rotation joints, including no friction losses, no need for lubrication, no hysteresis, compactness, capacity to be utilized in smallscale applications, ease of fabrication, virtually no assembly, and no required maintenance. Flexure bearings are often part of compliant mechanisms. Design of flexure hinges nicolae lobontiu flexure hinges hold several advantages over classical rotation joints, including no friction losses, no need for lubrication, no hysteresis, compactness, capacity to be utilized in smallscale applications, ease of fabrication, virtually no assembly, and no required maintenance. In order to avoid plastic deformation, the motion range of the. Hingefree compliant mechanism design via the topological. Pdf modelbased design of flexure hinges for rectilinear. Approximative modeling of compliant mechanism dynamics. Pdf modeling and design of flexure hingebased compliant.
But, in 3dof parallel type stage, it is not easy to design due to triangular structure. Compliant mechanisms are usually designed using two techniques, the first being a pseudorigidbody model and the second, the topology optimization. Develops the mathematical models for the compliancebased design of flexure hinges, and examines the statics and dynamics of flexurebased compliant mechanisms. Design of flexure hinges provides practical answers to the present and future needs of efficient design, analysis, and optimization of devices that incorporate flexure hinges. Three flexure hinges for compliant mechanism designs based on. Flexure hinges are commonly utilized in compliant mechanisms for the applications in micronanoinstruments, machines and systems such as scanning tunnel microscope, xray lithography, mask alignment, and micromanufacture,,,, where high positioning accuracy and resolution are the necessary and crucial requirements to fulfil the tasks.317 1392 630 488 923 1232 902 1050 564 429 327 1460 912 1060 232 139 661 562 666 1530 776 947 241 349 88 1542 1136 459 1258 119 1238 76 361 736 906 1176 296 880 146 1162 1 1203