Results 221 to 230 of about 46,051 (258)
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Evaluation of Ball-Bar Static Errors
1995This paper examines the static mechanical measurement errors of telescoping ball-bar systems used for the contouring assessment of a wide range of CNC machine tools. Several commercial systems were evaluated and a description of each system is given along with details of the various static tests that were conducted.
K. Dalby, M. Gull
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Calibration of double ball bar (DBB) system
SPIE Proceedings, 2009A double ball bar (DBB) system is an imperative device for measuring contouring accuracy, error characterization and interpretation of machine tool performance in volumetric workspace. The advantage that makes it popular and widely used by machine users is its quick performance checking, easy to use, portability and minimizing the down time of machine ...
Abdul Wahid Khan, Fei Liu, Wuyi Chen
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A Spatial Four-Bar Linkage RSPS for Ball-Bar to Test R-pair
2017A novel mechanism model of RSPS is firstly presented in the paper for testing the rotational ac-curacy of an actual R-pair, which is new in the literature. The spatial four-bar linkage RSPS is comprised of a ball-bar with three kinematic pairs S-P-S and an actual R-pair measured. The outputs of RSPS corresponds to the distance between two master balls’
Delun Wang +4 more
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Telescopic ball bar with an indexing joint for measuring machine tool error
Measurement Science and Technology, 2022Abstract Measurement and compensation of these errors can improve the machining accuracy of a machine tool. Double ball bar is one of the traditional instruments for measuring machine tool errors, whose measurement range depends on the length of the bar since the sensor has a stretching range of only 2 mm.
Wen Wang +9 more
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Räumliche Referenzierung an Werkzeugmaschinen mit dem Double-Ball-Bar
Zeitschrift für wirtschaftlichen Fabrikbetrieb, 2008Kurzfassung Die Reduzierung unproduktiver Nebenzeiten ist vor dem Hintergrund einer zunehmenden Individualisierung der Produkte entscheidend für eine wirtschaftliche Fertigung. Enorme Potenziale dafür liegen beispielsweise im Referenzieren von Werkstücken, Werkzeugen und Zusatzeinrichtungen im Arbeitsraum einer Maschine.
Knut Großmann, Bernd Kauschinger
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Analysis for Feasibility of the Method for Bars Driving the Ball Tensegrity Robot
Journal of Mechanisms and Robotics, 2017In tensegrity robots, the ball tensegrity robot attracts the most attention. The method of driving the ball tensegrity robot is analyzed here. At first, the ball tensegrity structure is described, and its mathematical model is setup. Through analysis, the method for driving bars to make the robot deform and roll is selected.
Ani Luo, Heping Liu
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Ball Impact Response of Unstrengthened and Chemically Strengthened Glass Bars
Journal of the American Ceramic Society, 2013Ball impact experiments were conducted at impact velocities of 52–345 m/s on unstrengthened and chemically strengthened lithium aluminosilicate glass bars to assess the damage propagation characteristics. The damage was captured by high‐speed imaging at frame rates up to 500 000 frames per second (fps).
Phillip Jannotti +2 more
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Journal of Oral Implantology, 2013
In an implant-supported overdenture, the optimal stress distribution on the implants and least denture displacement is desirable. This study compares the load transfer characteristics to the implant and the movement of overdenture among 3 different types of attachments (ball-ring, bar-clip, and magnetic).
V, Manju, T, Sreelal
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In an implant-supported overdenture, the optimal stress distribution on the implants and least denture displacement is desirable. This study compares the load transfer characteristics to the implant and the movement of overdenture among 3 different types of attachments (ball-ring, bar-clip, and magnetic).
V, Manju, T, Sreelal
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Estimates for the $$\bar \partial $$ -equation and zeros of holomorphic functions on the Lie-ball
Archiv der Mathematik, 1992The \({\bar \partial}\)-equation for (0,1)-forms on the Lie-ball is solved with some weighted \(L^ 1\)-estimates. The author uses the integral formula of Berndtsson and Andersson and the weighted \(L^ 2\)-estimate of Ohsawa. A sufficient condition for an analytic set to be the zero set of a holomorphic function of finite order on the Lie-ball is got ...
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Improvement in the surface quality of ball bearing steel rounds at Bar Mill
Scandinavian Journal of Metallurgy, 2002The rejection of ball bearing steel rounds had increased at Bar Mill due to surface defects following an increase in the demand for a better surface quality. The genesis of surface defects in ball bearing steel rounds is attributed to steel‐making and rolling processes.
Roylen Topno +4 more
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