Results 1 to 10 of about 2,387,534 (245)

A Linear Regression Thermal Displacement Lathe Spindle Model

Energies, 2020
Thermal error is one of the main reasons for the loss of accuracy in lathe machining. In this study, a thermal deformation compensation model is presented that can reduce the influence of spindle thermal error on machining accuracy.
Chih-Jer Lin, Xiao-Yi Su, Chi-Hsien Hu, Bo-Lin Jian, Li-Wei Wu, Her-Terng Yau   +5 more
doaj   +4 more sources

Thermal displacement mapping for detecting thermal expansion of heritage building during heatwave using 3D laser scanning

Developments in the Built Environment, 2023
The measurement of displacement is an essential factor in evaluating the stability of a heritage structure, especially when it is old. An unprecedented heatwave occurred in the summer of 2022 in the UK and 3D laser scanning was applied to monitor the ...
Abdalrahman Alazmi, Hyungjoon Seo
doaj   +4 more sources

Hybrid optimization algorithm for thermal displacement compensation of computer numerical control machine tool using regression analysis and fuzzy inference [PDF]

Science Progress, 2023
During the machining process, the computer numerical control machine is susceptible to variations in ambient temperature, cutting heat, and friction within the transmission parts, which generate different heat sources.
Ping-Yueh Chang, Po-Yuan Yang, Fu-I Chou, Shao-Hsien Chen   +3 more
doaj   +2 more sources

Thermal displacement prediction model of SVR high-speed motorized spindle based on SA-PSO optimization

Case Studies in Thermal Engineering, 2022
In view of the problem that a lot of heat is generated inside the motorized spindle when it is working, which causes thermal errors and affects the processing quality, this paper optimizes the Support Vector Regression through the particle swarm ...
Zhicheng Zhou, Ye Dai, Gang Wang, Shikun Li, Jian Pang, Shiqiang Zhan   +5 more
doaj   +3 more sources

Milking-Order Stability and Stabilization After Herd Entry Under Heat Stress: An Observational Study in a Large Dairy Herd [PDF]

Animals
Heat stress is known to affect dairy cow behavior, but its effects on milking-order patterns and stabilization after herd entry in large commercial herds are not well described.
Yifeng Song, Zhalaga, Muqier, Xiaoping An, Na Liu, Jingwei Qi   +5 more
doaj   +2 more sources

Reduced Differential Transform Method for Thermoelastic Problem in Hyperbolic Heat Conduction Domain

International Journal of Applied Mechanics and Engineering, 2021
In the present study, we have applied the reduced differential transform method to solve the thermoelastic problem which reduces the computational efforts.
K.K. Chaudhari, C.S. Sutar
doaj   +1 more source

ResearchProgressonThermalErrorCompensationandStructuralOptimizationofHigh-SpeedMotorizedSpindle

Journal of Harbin University of Science and Technology, 2023
Thermal displacement control of motorized spindles is one of the key problems in the machining process. Control thermal displacement of the motorized spindle to improve machining accuracy and surface quality. One of the common methods is to reduce the
LI Zhao long, ZHU Wen ming
doaj   +1 more source

Simulation analysis model of high-speed motorized spindle structure based on thermal load optimization

Case Studies in Thermal Engineering, 2023
High-end CNC machine tools' primary transmission mechanism is a high-speed electric spindle. Thermal displacement of the spindle occurs as a result of heat created inside the spindle during transmission, which has an impact on the machining precision of ...
Li Zhaolong, Zhu Wenming, Zhu Bo, Wang Baodong, Wang Qinghai, Du Junming, Sun Benchao   +6 more
doaj   +1 more source

A Study on Generation and Feasibility of Supercritical Multi-Thermal Fluid

Energies, 2022
Supercritical multi-thermal fluid is an emerging and efficient heat carrier for thermal recovery of heavy oil, but the generation of supercritical multi-thermal fluid and its feasibility in thermal recovery are rarely discussed. In this paper, generation
Xiaoxu Tang, Zhao Hua, Jian Zhang, Qiang Fu, Jie Tian   +4 more
doaj   +1 more source

Fiber-Optic Gyroscope Thermal Calibration through Two-Dimensional N-Order Polynomial for Landslide Displacement Monitoring

Energies, 2022
A fiber-optic gyroscope (FOG) with lower precision but higher cost advantage is typically selected according to working conditions and engineering budget. Thermal drift is the main factor affecting FOG precision.
Guiying Lu, Huiming Tang, Yu Zhu, Yongquan Zhang, Haifeng Xu   +4 more
doaj   +1 more source