Results 1 to 10 of about 18,648 (210)
Rotation Accuracy Analysis of Aerostatic Spindle Considering Shaft’s Roundness and Cylindricity [PDF]
Applied Sciences, 2021 The rotation accuracy of the aerostatic spindle can easily be affected by shaft shape errors due to the small gas film clearance. Thus, the main shaft shape errors with the largest scale—that is, the roundness and cylindricity errors—are studied in this ...
Guoqing Zhang +5 more
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Development of the spindle shaft for machining center using high thermal conductivity material
Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2023 Due to the high precision and high speed of spindles for machining centers, thermal issues cannot be avoided. The temperature rises of the spindle shaft, which is the rotating component, causes issues such as increased thermal displacement in the tool ...
Shingo KAJIKAWA +3 more
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Cooling of spindle shaft for machining center using heat exchangers
Journal of Advanced Mechanical Design, Systems, and ManufacturingThe cooling method for machining center spindles commonly involves utilizing a fixed-side jacket cooling system with lubricating oil or coolant as the refrigerant.
Shingo KAJIKAWA +2 more
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Estimating temperature distribution and heat quantity of spindle shaft for machining centers
Journal of Advanced Mechanical Design, Systems, and ManufacturingThe thermal issue of spindles for machining centers is still fundamentally unresolved. Thermal problems due to increased temperature of the spindle shaft lead to thermal displacement of the tool axis and an increase in friction torque, consequently ...
Shingo KAJIKAWA +3 more
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Synovial sarcoma: A case report of first presentation at penoscrotal junction [PDF]
Urology Case ReportsSynovial sarcoma is a rare malignant tumour that arises from mesenchymal origin. This case is about synovial sarcoma in unusual place, the scrotum and penile shaft. A 36-year-old man presented with a tender penoscrotal mass for 5 years.
Abumelha S +5 more
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Effect of alignment errors on operation of machine tool spindle with active bearing preloading module [PDF]
Archive of Mechanical Engineering, 2020 The article describes a test stand with a spindle equipped with an active bearing preload system using piezoelectric actuators. The proper functioning of the spindle and the active system was associated with the correct alignment of the spindle shaft and
Paweł Turek, Marek Stembalski
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Multi-Field Coupling Dynamics Modeling of Aerostatic Spindle
Micromachines, 2021 The aerostatic spindle in the ultra-precision machine tool shows the complex multi-field coupling dynamics behavior under working condition. The numerical investigation helps to better understand the dynamic characteristics of the aerostatic spindle and ...
Guoda Chen, Yijie Chen
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Механика машин, механизмов и материалов, 2021 The article presents the results of studies of the shaft oscillation processes of a precision horizontal highspeed electric spindle with aerostatic radial and axial supports, used at Planar OJSC in equipment for separation of semiconductor plates into ...
Alexander E. Kovensky +2 more
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Dynamic analysis of grinding electric spindle bearing-rotor system under eccentric action
Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2023 To study the influence of eccentricity on the dynamic characteristics of grinding electric spindle, firstly, the nonlinear oil film force (NOFF) expression of sliding bearing is established based on the boundary condition of adhesion pressure.
Lianchao SHENG, Qi SUN, Guo YE, Wei LI
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Static analysis of multi-support spindle shafts with nonlinear elastic bearings
Bulletin of the National Technical University «KhPI» Series: Dynamics and Strength of Machines, 2021 In this paper a mathematical model and computational tool are developed for the static analysis of multi-bearing spindle shafts with nonlinear elastic supports. Based on the Timoshenko beam theory a resolving system of equations is obtained that takes into account the nonlinear dependence of the bearing stiffness on the reaction forces acting upon them.
Oleksiy Kyrkach +2 more
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