Results 21 to 30 of about 18,727 (183)

ERGONOMIC DESIGN OF CAB STRUCTURE FOR WHEELED COMBINE HARVESTER [PDF]

Engenharia Agrícola, 2022
In view of the fact that the design of the cab structure of wheeled combine harvesters in China lacks ergonomic design parameters exclusive for Chinese drivers, there are generally problems such as high vibration and poor comfort of the whole machine ...
Sifan Liu, Zhong Tang, Ben Zhang, Yaquan Liang, Xinyang Gu   +4 more
doaj   +1 more source

Evaluation of quality parameters of conical profile compounds in nodes of multi-purpose machines [PDF]

E3S Web of Conferences, 2019
The article presents a study of the mandrel spindle assembly for accuracy, contact stiffness and strength. The study was made on the basis of conical profile connections with an equiaxed contour. Experiments were carried out for multi-purpose machines of
Il’inykh Viktor
doaj   +1 more source

Thermal-induced influences considered spindle unit angular contact ball bearing preload determination using embedded fiber Bragg gating sensors

International Journal of Distributed Sensor Networks, 2022
As the most important segment of the spindle unit angular contact ball bearing, the preload significantly influences the bearing characteristics. Thus, the thermal-induced preload derived from the thermal expansion of spindle unit components also affects
Yanfang Dong, Feifan Chen, Ming Qiu
doaj   +1 more source

Estimating temperature distribution and heat quantity of spindle shaft for machining centers

Journal of Advanced Mechanical Design, Systems, and Manufacturing
The 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, Sho MORITA, Hiroshi USUKI, Naohiko SUGITA   +3 more
doaj   +1 more source

Research on Influencing Factors of Fatigue Strength of Wind Turbine Spindles Based on Nonlinear Contact

Jixie chuandong, 2023
In order to more reasonably simulate the force and force transmission characteristics of the main shaft of a wind turbine, and to find out the influencing factors of the fatigue strength of the main shaft, the nonlinear contact element is used to ...
Song Kewei, Chen Xiaoxu, Liu Xiangyin, Tian Jiabin, Li Xiaoxia   +4 more
doaj  

Supersmooth grinding technology of spindle outer circle

Jin'gangshi yu moliao moju gongcheng, 2023
In order to improve the surface roughness and roundness of the outer cylindrical surface of the spindle after precision grinding, a novel vertical precision grinding method was proposed, and a vertical grinding device was developed.
Bin LI, Xiaoyu SONG, Yuanyuan WU, Xiaopeng ZHANG, Dongxu REN, Zexiang ZHAO   +5 more
doaj   +1 more source

Characterization of Dimensional Variations in Turning Process for Multistep Rotary Shaft of High-Speed Motorized Spindle

Machines, 2023
The surface accuracy of a multistep rotary shaft is very important in manufacturing and the assembly process of the high-speed motorized spindle of CNC machine tools, which is closely related to the machined dimensional variation induced by the turning ...
Ang Tian, Xueming Du, Shun Liu, Sun Jin
doaj   +1 more source

Dynamic behavior of the horizontal milling and drilling machine spindle assembly with Dynrot software

MATEC Web of Conferences, 2017
This article presents research conducted to study the dynamic behavior of the assembly of a horizontal milling CNC machine spindle at the speed of 10 000 rpm and 50 000 rpm.
Căruţaşu Nicoleta Luminiţa, Pascu Nicoleta Elisabeta, Căruţaşu George   +2 more
doaj   +1 more source

Method for Vibration Response Simulation and Sensor Placement Optimization of a Machine Tool Spindle System with a Bearing Defect

Sensors, 2012
Bearing defects are one of the most important mechanical sources for vibration and noise generation in machine tool spindles. In this study, an integrated finite element (FE) model is proposed to predict the vibration responses of a spindle bearing ...
Hongrui Cao, Linkai Niu, Zhengjia He
doaj   +1 more source

Projekt for manufacturing of gears for Company Stab spol. s r. o. [PDF]

, 2020
Diplomová práca opisuje projekt na založenie novej divízie pre firmu ktorá sa zaoberá generálnymi opravami strojov. V prvej časti práce je rozoberaná teoretická časť o výrobnom procese ozubenia a ekonomická časť tejto práce. Hlávne časti práce sú analýza
Štefan Staník
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