Thematische Bibliographien / Calculation of the shapes of the cams

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Auswahl der wissenschaftlichen Literatur zum Thema „Calculation of the shapes of the cams“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 10. Februar 2022

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Zeitschriftenartikel zum Thema "Calculation of the shapes of the cams"

Tang, Xue Mei, und Xin Xing Tang. „Parameterized Modeling and Dynamic Modal Analysis of Conjugate Cam Beating-up Mechanism“. Applied Mechanics and Materials 251 (Dezember 2012): 271–74. http://dx.doi.org/10.4028/www.scientific.net/amm.251.271.

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Taking the conjugate cams beating-up mechanism as an example to carry out three-dimensional parameterized design with Pro/Engineer secondary development accords to the equations of conjugate cams curves derived by the analytical method. Using the finite element software ANSYS the dynamic characteristic of beating rocker has been analyzed. And through the calculation the modal distribution and modal shapes of beating rocker are provided. It could provide references for design of future high-performance beating-up mechanism.

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Makushev, Yu P., T. A. Polyakova, L. Yu Volkova und V. V. Ryndin. „Kinematic calculation and plotting of lifting height and speed of the tangential cam pusher using MATHCAD program“. Omsk Scientific Bulletin, Nr. 178 (2021): 5–12. http://dx.doi.org/10.25206/1813-8225-2021-178-5-12.

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The article shows the design features of tangential cams with a rounded top, provides a method for determining the lifting height and speed of the pusher when the roller is rolling in a straight line and in contact with the actual profile of the cam. The formulas for the kinematic calculation of the tangential cam are refined taking into account the radius of the initial circumference of the shaft, the radius of the rounding of the cam tip and the value of the radius of the pusher roller. Calculations are given to determine the stroke and speed of the pusher when the roller is rolling on the sections of the straight and arc-shaped surface of tangential cams with a radius of rounding of 6 and 10 mm. Formulas are proposed for determining the lift of the pusher in the rolling section of the roller along the radius of the cam tip at a constant coefficient λ = 1 and λ = 1,5. Using the Mathcad program calculations are performed and combined graphs of the pusher lift and the change in its speed are constructed for two types of tangential cams

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Volkova, S. N., A. V. Shleenko, V. V. Morozova und E. E. Sivak. „Analysis of Linear Surfaces of Building Structures“. Proceedings of the Southwest State University 24, Nr. 3 (06.12.2020): 111–20. http://dx.doi.org/10.21869/2223-1560-2020-24-3-111-120.

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Purpose of reseach is to analyze the practice in the application of surfaces formed by the movement of a straight line. It is known that among the second-order surfaces cones, cylinders, hyperboloids of one sheet and hyperbolic paraboloids, as well as lines represented in the polar coordinate system in the form of intricate shapes that can be represented in space by the above-mentioned surfaces, adding a third dimension, have rectilinear generators. The strength resulting from covering each point of the listed surfaces with straight lines from different families does not make the structure heavier but strengthens it and makes it light compared to monoliths without reinforcements made of other materials, in which stability is not based on Shukhov calculation formulas. Methods Finding families of rectilinear generators for second-order surfaces calculation of which is based on the separation of equations that represent a second-order surface as a difference of squares in one part of the equation and as a product with an arbitrary parameter in the other part. Results. Analyzing second-order surfaces, we came to the conclusion that cones, cylinders are prone to this method of Shukhov calculations; equation of the form F (x,y)=0 in space defines a cylindrical surface whose generators are parallel to axis oz. Similarly, F (x, z)=0 defines a cylindrical surface with generators parallel to axis oy and F (y;z)=0 is a cylindrical surface with generators parallel to axis ox. A hyperboloid of one sheet, hyperbolic paraboloid, i.e. 10 surfaces out of 14, make up more than 70%. Conclusion. As a result of applying these formulas for calculating reinforced building structures, city buildings will acquire a new appearance, which will create a comfortable environment for residents, as well as lead to saving construction material resources.

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Dostrašil, Pavel, und Petr Jirásko. „Tools for Automated Design of Intermittent Mechanisms with Radial Parallel Cams“. Applied Mechanics and Materials 325-326 (Juni 2013): 299–304. http://dx.doi.org/10.4028/www.scientific.net/amm.325-326.299.

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The paper deals with the kinematics and automated calculation of intermittent mechanisms with radial cams. Currently, electronic cams are increasingly applied in the drives of working link mechanisms. Despite a huge advantage of electronic cams in their re-programmability or instantaneous change of displacement diagrams, conventional cam mechanisms have an irreplaceable role in production and handling machines. With high frequency of working cycle periods, the dynamic load of the proper servomotor rotor increases and efficiency of electronic cams strongly decreases. Though conventional intermittent mechanisms with radial cams are representatives of fixed automation, they have distinct advantages in their high speed (high dynamics), positional accuracy and relatively easy manufacture. We try to remove the disadvantage of firm displacement diagram by reducing costs for simple design and automated calculation that leads reliably to high-quality and inexpensive manufacture.

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Sukach, M. K. „The Staple-Shape Plate Springs Engineering Calculation Method“. Science & Technique 20, Nr. 3 (03.06.2021): 268–74. http://dx.doi.org/10.21122/2227-1031-2021-20-3-268-274.

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The new types of elastic devices – staple-shape plate spring and leaf spring - have been developed at the Kyiv National University of Construction and Architecture. The staple-shape plate spring is an elastic plate where the ends are deflected from its middle part in the same direction and are made in the form of consoles equipped with hinge attachments. The middle part of the plate as a parallel to the line of the load action is designed with variable length section. In each section, the axis, relative to which the moment of the section inertia is a maximum, is perpendicular to the spring bending plane, designed as the equal resistance beam. This article substantiates the feasibility of using a staple-shape plate spring to improve the elastic suspension of truck cabs. The recommendations for choosing the most promising mass production directions, as well as the engineering calculation methods of such springs, have been developed. Objects of the study are devices intended for machines and their components dynamic loads shock absorption, differing in having a bracket shape and being a subject to bending in the plane of the highest rigidity of their cross sections, as well as shock absorbers using these springs, in particular KamAZ cabs suspension. This research implementation allows significantly reducing the metal consumption and elastic devices manufacture complexity, as well as can be useful in the design and operation of elastic car suspensions.Keywords: elastic device, staple-shaped plate spring, leaf spring, elastic suspension

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Smith, Richard S. „Using combinations of spatial gradients to improve the detectability of buried conductors below or within conductive material“. GEOPHYSICS 78, Nr. 1 (01.01.2013): E19—E31. http://dx.doi.org/10.1190/geo2012-0210.1.

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The detection of conductive bodies is an important capability when exploring for massive sulfide deposits or looking for unexploded ordnance. When these bodies are buried below conductive overburden or embedded in conductive material, the use of an electromagnetic system to identify the bodies becomes problematic because the response of the overlying conductive material can be much greater that the response of the buried conductor. I calculated the response of five models representing different conductivity distributions (a buried conductor, a uniform overburden with changes in the system altitude, a paleochannel, a thicker overburden, and a thinner overburden). The subtle response of the buried conductor was difficult to identify because it looked very similar to the responses of other structures that are not necessarily of interest. The spatial gradients for the same five models showed that the greatest improvement in the relative size of the anomalous gradient response compared with the background gradient came for the cases in which the material closest to the surface changes, in particular the paleochannel and thickening overburden models. However, identification of the deeper buried conductor was still problematic because of the large background gradients. In theory, the cylindrical symmetry of a dipole transmitter over a layered earth ensured that there were exact relations between the spatial derivatives. Hence it was possible to define two specific combinations that should be zero over a layered earth. Calculating these combinations for the five models showed that the anomalous zones stood out with significantly greater anomaly-to-background ratios. The measurement of the gradients and the calculation of these combinations therefore provided a means of identifying anomalous zones in and below a conductive earth. Different relative sizes and shapes of the two combinations for different models provided a way of discriminating between the vertical conductor model and the four other models.

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Buj-Corral, Irene, Enrique Zayas-Figueras und Àngels Montaña-Faiget. „Comparative Study of Flank Cams Manufactured by WEDM and Milling Processes“. Metals 10, Nr. 9 (27.08.2020): 1159. http://dx.doi.org/10.3390/met10091159.

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Cam-follower mechanisms are usually employed in different machines, like combustion engines, sewing machines, machine tools, etc. In the present paper, the option to manufacture cams utilizing wire electrical discharge machining (WEDM) has been considered. For this, surface roughness and shape error of cam profiles manufactured by the processes of milling and wire electrical discharge machining (WEDM) are presented. The methodology used covers different stages: design, prototyping, manufacturing, and measurement of the cams. As a reference, a cam-follower mechanism from a motorcycle internal combustion engine has been used. A reverse engineering process has been performed to determine the geometrical parameters of the mechanism, which are used for the synthesis of the profile of the cam and its subsequent design. The manufacturing process of the cams has been assisted by CAD-CAM (Computer Assisted Drawing-Computer Assisted Manufacturing) software. Using fused filament fabrication (FFF), a physical prototype of the cam has been manufactured, in order to validate the goodness of the design. Finally, the roughness and shape parameters have been measured on the contour surface of the cams. The arithmetical mean roughness Ra value of the milled cam was 0.269 μm, below the requirement of 0.4 μm, and shape error was 18 μm, below 50 μm. Shape error of the WEDM cam of 48 μm meets the requirements for cams. However, the Ra value of 1.212 μm, exceeded the limit. For this reason, a finish operation is recommended in this case. Some advantages of WEDM cams over milled cams are that different conductive materials can be employed, more complex shapes can be obtained, and that, in rough operations, the amount of material to be removed in subsequent operations is considerably reduced.

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Mougeot, X., M. M. Bé und C. Bisch. „Calculation of beta spectral shapes“. Radioprotection 49, Nr. 4 (26.09.2014): 269–73. http://dx.doi.org/10.1051/radiopro/2014017.

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Burdzik, R., Ł. Konieczny, Z. Stanik, P. Folęga, A. Smalcerz und A. Lisiecki. „Analysis of Impact of Chosen Parameters on the Wear of Camshft“. Archives of Metallurgy and Materials 59, Nr. 3 (28.10.2014): 957–63. http://dx.doi.org/10.2478/amm-2014-0161.

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Abstract The paper provides an analysis of the reasons for excessive wear of the camshafts system components based on models developed to describe the impact of selected material, technological and operational factors. The subject of the research was wear of camshaft cams studied in accordance with results of operation tests. Based on the said tests, the dependence of wear intensity of cams from their angular position was established. The respective calculation results enabled the function of cam fallibility to be determined.

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Березін, Л. М. „ДО РОЗРАХУНКУ ГЕОМЕТРИЧНИХ ПАРАМЕТРІВ ПОДАТЛИВИХ ГРАНЕЙ КЛИНІВ“. Bulletin of the Kyiv National University of Technologies and Design. Technical Science Series 138, Nr. 5 (03.02.2020): 9–16. http://dx.doi.org/10.30857/1813-6796.2019.5.1.

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Development of recommendations for calculating the geometry of cams with flexibility facet, which have console beams with variable moment of section resistance along their length for provide strength conditions and specified deflections. Method of search, description, analogous and information analysis is used to audit the many possible decisions regarding the subject of research, the experience in the field of knitting machines of automatic half-hose machine and methods of cross and longitudinal sections from the classical position of resistance of materials. Mathematical support for the complex approach of working out of cams of various designs with flexibility working facets according to the criteria of strength, flexibility and minimization of geometric dimensions using the beam shape coefficient of deflections is presented. The advantages of beams with equal resistance along its length in comparison with homogeneous beams having constant section sizes are shown. The dependences are given, which advisable to determine the dimensions of the root and final sections of a trapezoidal beam with a free end load of concentrated force, and also formulas for calculating the shape coefficient by deflection with sufficient accuracy and convenience in engineering calculations. Further development of the theory and methodology of designing elements of knitting systems of automatic half-hose machine based on load modes, dimensions restrictions and technological process requirements. Questions are presented that contribute to a comprehensive approach to the improvement of cams designs with flexibility facet based on calculated recommendations, taking into account their specificity. The information helps to improve the quality and efficiency of cam design solutions to meet the requirements for strength and flexibility using the economic index of section.

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Dissertationen zum Thema "Calculation of the shapes of the cams"

Bláha, Pavel. „Návrh konstrukce jednoúčelového manipulátoru pro automatickou výměnu nástrojů s třívačkovým generátorem pracovního cyklu“. Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-442800.

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This thesis deals with the design of a single-purpose manipulator for automatic tool changing with a three-cams generator of the working cycle. At the beginning of the paper, general background information about tool trays and manipulators for the change of tools is briefly described. The scheme of the kinematic manipulator is proposed in this work as well. The thesis also includes the calculation of the shapes of the grooves in the cams. The result of this work is the design of the manipulator, including an animation of tool changing.

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Svoboda, Radek. „Návrh a posouzení ocelové konstrukce“. Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265683.

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Topic of the master’s thesis is design and assessment of steel construction of the industrial building used to glass sand treatment. The building has the top view dimensions 12,0 x 12,0 m and roof ridge height 15,6 m. Disposition if the individual elements was designed according to conditions of the technology and production process. The thesis focus on creating of computational model and assessment to ultimate and serviceability limit states of individual elements. Further thesis contains of design and optimisation of some joints.

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Bücher zum Thema "Calculation of the shapes of the cams"

Chance, Kelly, und Randall V. Martin. Line Shapes. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780199662104.003.0006.

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Line shapes describe how absorption and emission are spectrally distributed around the line positions formed by rotational, vibrational, and electronic transitions. Line shapes arise from the different processes that spectrally broaden the absorption and emission of radiation. Optical thickness and equivalent width are shown to be fundamentally related to line shape. The fundamental line shape functions for atmospheres including the Gaussian line shape due to molecular motion and the Lorentzian line shape from lifetime broadening, including collision (pressure) broadening are described. Their convolution, the Voigt line shape, which is important in some atmospheric conditions is also described. The standard HITRAN database of spectroscopic parameters of molecules for use in calculation of radiative transfer in planetary atmospheres, from radiofrequencies to the near ultraviolet, is introduced.

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Buchteile zum Thema "Calculation of the shapes of the cams"

Horvath, G., und M. Suzuki. „Pore Size Calculation in the Case of Different Geometrical Shapes“. In Physical Adsorption: Experiment, Theory and Applications, 133–49. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5672-1_7.

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Green, Sheldon. „Calculation of Pressure Broadened Spectral Line Shapes Including Collisional Transfer of Intensity“. In Status and Future Developments in the Study of Transport Properties, 257–83. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-017-3076-1_12.

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Huang, Guangjing, Yuting Dai, Chao Yang und Siyan Zhu. „Fast Flutter Uncertainty Calculation Based on Arbitrary Mode Shapes and Reduced - Order Modeling“. In Lecture Notes in Electrical Engineering, 2607–26. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-3305-7_210.

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Nichol, Lawrence W., und Donald J. Winzor. „[2] Calculation of asymptotic boundary shapes from experimental mass migration patterns“. In Methods in Enzymology, 6–18. Elsevier, 1986. http://dx.doi.org/10.1016/0076-6879(86)30004-1.

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Mottram, J. T. „6.2 Calculation of the critical local buckling load in PFRP shapes“. In Advanced polymer composites for structural applications in construction, 337–45. Thomas Telford Publishing, 2002. http://dx.doi.org/10.1680/apcfsaic.31227.0035.

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Hatfield, Gary. „Geometry and Visual Space from Antiquity to the Early Moderns“. In Space, 184–222. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780199914104.003.0008.

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This chapter examines the development of a geometrical framework for understanding and explaining spatial aspects of visual perception, including perception of the sizes, shapes, and positions of things in the field of view. The structure of this framework is built on the fact that vision typically occurs in straight lines (rectilinearly). Within this framework, the chapter selectively focuses on size perception. This focus allows for a comparative examination of how a single problem was treated geometrically by various theorists, ancient, medieval, and modern. The theorists examined are Euclid and Ptolemy, who were extramissionists, and Ibn al-Haytham, Kepler, Descartes, and Berkeley, each of whom adopted, in one way or another, an intromissionist scheme. In comparing Descartes and Berkeley, notice is taken of Berkeley’s interpretive bent in treating Descartes’s account of distance perception in a way that requires mental calculation, where Descartes sometimes offered psychophysiological mechanisms (avoiding mental calculation).

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Mejia, Guilherme Lourenço. „Solid Rocket Motor Internal Ballistics Simulation Considering Complex 3D Propellant Grain Geometries“. In Energetic Materials Research, Applications, and New Technologies, 146–69. IGI Global, 2018. http://dx.doi.org/10.4018/978-1-5225-2903-3.ch007.

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Solid rocket motors (SRM) are extensively employed in satellite launchers, missiles and gas generators. Design considers propulsive parameters with dimensional, manufacture, thermal and structural constraints. Solid propellant geometry and computation of its burning rate are essential for the calculation of pressure and thrust vs time curves. The propellant grain geometry changes during SRM burning are also important for structural integrity and analysis. A computational tool for tracking the propagation of tridimensional interfaces and shapes is then necessary. In this sense, the objective of this work is to present the developed computational tool (named RSIM) to simulate the burning surface regression during the combustion process of a solid propellant. The SRM internal ballistics simulation is based on 3D propagation, using the level set method approach. Geometrical and thermodynamic data are used as input for the computation, while simulation results of geometry and chamber pressure versus time are presented in test cases.

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Vedral, Vlatko. „Surfing the Waves: Hyper-Fast Computers“. In Decoding Reality. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198815433.003.0016.

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Who hasn’t heard of a computer? In a society entirely dominated by these transistor infested boxes there are probably only a few remaining isolated tribes in the Amazon or around the Kalahari that have not been affected. From organizing our finances, flying a plane, warming up food, controlling our heartbeat (for some), these devices are prevalent in each and every aspect of our society. Whether we are talking about personal computers, mainframe computers, or the embedded computers that we find in our mobile phones or microwave ovens, it is very hard to even imagine a world without them. The term computer, however, means more than just your average Apple Mac or PC. A computer, at its most basic level, is any object that can take instructions, and perform computations based on those instructions. In this sense computation is not limited to a machine or mechanical apparatus; atomic physical phenomena or living organisms are also perfectly valid forms of computers (and in many cases far more powerful than what we can achieve through current models). We’ll discuss alternative models of computation later in this chapter. Computers come in a variety of shapes and sizes and some are not always identifiable as computers at all (would you consider your fridge a computer?). Some are capable of doing millions of calculations in a single second, while others may take long periods of time to do even the most simple calculations. But theoretically, anything one computer is capable of doing, another computer is also capable of doing. Given the right instructions, and sufficient memory, the computer found in your fridge could, for example, simulate Microsoft Windows. The fact that it might be ridiculous to waste time using the embedded computer in your fridge to do anything other than what it was designed for is irrelevant – the point is that it obeys the same model of computation as every other computer and can therefore – by hook or by crook – eventually achieve the same result. This notion is based on what is now called the Church–Turing thesis (dating back to 1936), a hypothesis about the nature of mechanical calculation devices, such as electronic computers.

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Konferenzberichte zum Thema "Calculation of the shapes of the cams"

Kumanotani, Maho, Hitoshi Kusino und Keiichi Nakamoto. „Proposal of a Tool Path Generation Method to Ensure Workpiece Stiffness for Efficient Rough Machining“. In JSME 2020 Conference on Leading Edge Manufacturing/Materials and Processing. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/lemp2020-8543.

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Abstract Recently, the demand of complex shape parts has increased in the aircraft and medical industries. In these parts machining, the displacement and vibration of workpiece that strongly affect the machining efficiency are induced due to the heavy change of the unmachined workpiece shape and stiffness during rough machining. However, it is difficult to automatically determine machining parameters of operation planning by using a commercial CAM software because there is a large number of combinations. Therefore, in order to improve the efficiency of complex parts machining, the authors proposed a determination method of workpiece shapes during rough machining based on topology optimization relevant to maximizing static stiffness. On the other hand, tool paths that directly affect the workpiece stiffness are not generated automatically to create the calculated workpiece shapes in the previous study. From these reasons, this study proposes a generation method of tool paths by using design variables obtained through the calculation of topology optimization. The tool paths are simply generated based on design variables and enables to ensure the workpiece stiffness during rough machining because design variables are strongly related to the objective function. By conducting a machining experiment assuming complex parts machining, it is confirmed that the proposed method has a potential to realize efficient rough machining.

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Belsley, Michael. „A model calculation for nonimpact four wave mixing“. In Spectral line shapes. AIP, 1990. http://dx.doi.org/10.1063/1.39930.

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Ishizuka, Akane, Narimasa Ueda, Yoshitaka Morimoto, Akio Hayashi, Yoshiyuki Kaneko und Naohiko Suzuki. „Study on Non-Axisymmetric 3D Curved Surface Turning by Driven-Type Rotary Tool Synchronized With Spindle“. In ASME 2021 16th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/msec2021-65062.

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Abstract Since shifting to electric vehicles as a countermeasure against global warming is not always easy to complete, the hybrid car has been considered as another possible solution. However, based on the calculation of total CO2 emissions, all hybrid cars which will constitute 90% of all cars are expected to be equipped with an internal combustion engine even after 2030. Therefore, further efficiency improvement of the internal combustion engine is necessary. One of the key factors is the variable valve timing and variable lift with the 3D cam mechanism. Since conventional technology uses a complicated link mechanism and servo motor control, this leads a problem to set into small cars or motorcycles because they cannot afford to install the variable valve timing and variable lift with cam mechanism. To solve this problem, a cam shape with a three-dimensional curved surface has been proposed. In order to create this shape, the machining method for non-axisymmetric curved surface turning (NACS-Turning) is required. To build the new system, our research group has proposed a new machining method using a driven type rotary tool and a linear motor driven moving table to enable to achieve NACS-Turning. In this new system, a new tool rotation axis (B axis) is adopted to synchronize its rotational position with the rotational position of the spindle (C axis) holding the workpiece, the X1-, X2-, and Z-Axis positions in total. In this paper, the new hardware configuration is proposed to overcome the present machining accuracy.

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Jiang, Yichen, und Ronald W. Yeung. „Computational Modeling of Rolling Cams for Wave-Energy Capture in a Viscous Fluid“. In ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/omae2012-84150.

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The performance of an unsymmetrical rolling cam as an ocean-wave energy extractor was studied experimentally by Salter (1974) and then analyzed from the hydrodynamics standpoint by a number of workers in the 70’s (e.g. Evans, 1976). The analysis was carried out on the basis of inviscid-fluid theory and the energy-absorbing efficiency was found to approach 100%. This well-known result did not account for the presence of viscosity, which alters not only fluid damping but also, to some extent, the added-inertia characteristics. How fluid viscosity may alter these conclusions and reduce the energy-extraction effectiveness is examined in this paper, for two rolling-cam shapes: a smooth “Eyeball Cam” with a simple mathematical form and a “Keeled Cam” with a single sharp-edged bilge keel. The solution methodology involved the Free-Surface Random-Vortex Method (FSRVM), reviewed by Yeung (2002). Frequency-domain solutions in inviscid fluid were first sought for these two shapes as baseline performance metrics. As expected, without viscosity, both shapes perform exceedingly well in terms of extraction efficiency. The hydrodynamic properties of these two shapes were then examined in a real, viscous fluid, under a high Reynolds-number assumption. The added moment of inertia and damping are noted to be changed, especially for the Keeled Cam. With the power-take-off (PTO) damping chosen based on the viscous-fluid results, time-domain solutions are developed to understand the behavior of the rolling motion, the effects of PTO damping, and the effects of the cam shapes. These assessments can be effectively made with FSRVM as the computational engine, even at motion of fairly large amplitude, for which an actual system may need to be designed.

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Ishizuka, Akane, Kensuke Nakagawa, Yoshitaka Morimoto, Akio Hayashi, Yoshiyuki Kaneko, Naohiko Suzuki und Ryo Hirono. „Study on Non-Axisymmetric 3D Curved Surface Turning by Driven-Type Rotary Tool Synchronized With Spindle“. In JSME 2020 Conference on Leading Edge Manufacturing/Materials and Processing. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/lemp2020-8505.

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Abstract Since shifting to electric vehicles as a countermeasure against global warming is hard to complete, the hybrid car has been considered as another possible solution. However, based on the calculation of total CO2 emissions, all hybrid cars which will constitute 90% of all cars are expected to be equipped with an internal combustion engine even after 2030. Therefore, further efficiency improvement of the internal combustion engine is necessary. One of the key factors is the variable valve timing and variable lift of the cam mechanism. Since conventional technology uses a complicated link mechanism and servo motor control, this creates a problem to build small cars or two-wheeled vehicles because they are not big enough for the size and weight of the two important parts: the variable valve timing and variable of cam mechanism, which won’t fit. To solve this problem, a cam shape with a three-dimensional curved surface has been proposed. In order to create this shape, the machining method for non-axisymmetric curved surface turning (NACS-Turning) is required. To build the new system, our research group has proposed a new machining method using a driven rotary tool and a linear motor driven moving table to enable to achieve NACS-Turning. In this new system, a new tool rotation axis (B axis) is adopted to synchronize its rotation position with the rotation position of the spindle (C axis) holding the workpiece and the X1-, X2-, and Z-Axis positions in total. In this paper, the new hardware configuration is proposed to overcome the present machining accuracy from the point of non-circular machining method.

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Christova, M., L. Christov, M. S. Dimitrijević, N. Andreev, Marco Antonio Gigosos und Manuel Ángel González. „Calculation of the shifts of argon spectral lines“. In SPECTRAL LINE SHAPES: Volume 15–19th International Conference on Spectral Line Shapes. AIP, 2008. http://dx.doi.org/10.1063/1.3026499.

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Chenini, K., F. Khelfaoui, M. T. Meftah, Marco Antonio Gigosos und Manuel Ángel González. „Spectral Line Calculation Model in no Optically Thin Plasma“. In SPECTRAL LINE SHAPES: Volume 15–19th International Conference on Spectral Line Shapes. AIP, 2008. http://dx.doi.org/10.1063/1.3026476.

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Lewis, John Courtenay. „On the Calculation of Vector Collision—Sequence Interference in Collision-Induced Absorption“. In SPECTRAL LINE SHAPES: 18th International Conference on Spectral Line Shapes. AIP, 2006. http://dx.doi.org/10.1063/1.2402769.

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Yang, Ming, Yuyi Lin und Xiaoyi Jin. „Kineto-Elastic Analysis of a Compound Bow“. In ASME 2015 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/detc2015-46818.

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This paper presents the kineto-elastic analysis of a compound bow which in each side of the limbs has two stacked eccentric cams connected by two inextensible cables and one inextensible string. A large deformation cantilever beam model was created to determine the center trajectories of the cams. The principle of finite element method was applied to calculate the deformation of the limbs by combining small deflections of segmented cantilever beam elements. Another part of this work is the construction of a quasi-static model to simulate the draw process. The displacements of cams, cables and string were analyzed by gradually drawing the bow string. The required draw force as a function of draw length was obtained, and verified by experiments. The kineto-elastic analysis procedure described in this paper can be used later for the optimal design of the shapes of the cams and limbs. The modeling and simulation procedure used for combining elastic components, flexible but inextensible string-cable components, and rigid component in a precision dynamic model of a mechanical system can also be applied to archery bows with more complex configuration, and to other similar mechanical systems.

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Kurosawa, Ryou, Kentaro Tenma und Toshiyuki Sawa. „FEM Calculation and Evaluation of Sealing Performance in Oil Pan Wavy-Shaped Flange Gasketed Connections“. In ASME 2011 Pressure Vessels and Piping Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/pvp2011-57499.

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The oil pan wavy-shaped flange connection, while is a type of the box-shaped flange connections, has been used for the oil-pan in the vehicles such as cars and motorcycles to seal inner fluid. Though the light weight of these connections is important, the design method has not been established, since no research for evaluating the sealing performance of the wavy-shaped flange connections has been conducted. In this paper, The contact gasket stress distribution in a oil pan wavy-shaped flange connection under the internal pressure is examined taking into account a gasket hysteresis using finite element method (FEM) for estimating a location where a principal leakage occurs and for calculating the amount of leakage. Leakage tests were also conducted to validate the estimated results using an actual connection under internal pressure. The effects of flange shape and difference in types of inner fluid (gas / liquid) are examined on the contact gasket stress distributions and the sealing performance in the connections. It is found that the estimated amount of leakage is in a fairly good agreement with the measured results. Furthermore, discussion on the effect of the bolt spacing and the gasket width on the sealing performance are made.

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Berichte der Organisationen zum Thema "Calculation of the shapes of the cams"

Moody, K., D. Shaughnessy und J. Gostic. Calculation of Transactinide Homolog Isotope Production Reactions Possible with the Center for Accelerator Mass Spectrometry (CAMS) at Lawrence Livermore National Laboratory. Office of Scientific and Technical Information (OSTI), November 2011. http://dx.doi.org/10.2172/1033741.

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