Investigation of Temperature Distribution in High-Speed End Mill Assisted by Heat Pipe Cooling

2011 ◽  
Vol 418-420 ◽  
pp. 1154-1157
Author(s):  
Qing Hua Song ◽  
Hua Wei Ju ◽  
Wei Xiao Tang
Keyword(s):  
Experimental Study ◽  
Temperature Field ◽  
Heat Pipe ◽  
High Speed ◽  
Experimental Studies ◽  
Solid Cylinder ◽  
End Mill ◽  
Milling Operations ◽  
Cylinder Model ◽  
Pipe Mill

A combined numerical and experimental study is performed to analyze the feasibility of using heat pipe cooling in milling applications. In this model, it is assumed that the end mill is subjected to a static heat source which verifies the analysis and feasibility of using heat pipe cooling in milling operations. The performance of heat pipe mill model is approximated using a solid cylinder model of pure conduction. Both the numerical and experimental studies show that the use of a heat pipe in a mill can reduce the temperature field significantly.

Stability of Milling Operations With Asymmetric Cutter Dynamics in Rotating Coordinates

2016 ◽  
Vol 138 (8) ◽  
Author(s):  
Alptunc Comak ◽  
Orkun Ozsahin ◽  
Yusuf Altintas
Keyword(s):  
Time Domain ◽  
Machine Tools ◽  
High Speed ◽  
End Mill ◽  
Spindle Shaft ◽  
Milling Operations ◽  
Stability Model ◽  
Principal Directions ◽  
The Stability ◽  
Rotating Coordinates

High-speed machine tools have parts with both stationary and rotating dynamics. While spindle housing, column, and table have stationary dynamics, rotating parts may have both symmetric (i.e., spindle shaft and tool holder) and asymmetric dynamics (i.e., two-fluted end mill) due to uneven geometry in two principal directions. This paper presents a stability model of dynamic milling operations with combined stationary and rotating dynamics. The stationary modes are superposed to two orthogonal directions in rotating frame by considering the time- and speed-dependent, periodic dynamic milling system. The stability of the system is solved in both frequency and semidiscrete time domain. It is shown that the stability pockets differ significantly when the rotating dynamics of the asymmetric tools are considered. The proposed stability model has been experimentally validated in high-speed milling of an aluminum alloy with a two-fluted, asymmetric helical end mill.

Theoretical and experimental study of temperature field in noncircular high-speed grinding

2020 ◽  
Vol 107 (7-8) ◽  
pp. 3581-3592
Author(s):  
Tao Liu ◽  
Zhaohui Deng ◽  
Lishu Lv ◽  
Jun Yi ◽  
Shuailong She ◽  
...  
Keyword(s):  
Experimental Study ◽  
Temperature Field ◽  
High Speed ◽  
High Speed Grinding

Research on Dynamic Temperature Field Modeling of the Solid Carbide End Mill in High-Speed Milling

2015 ◽  
Vol 1089 ◽  
pp. 350-353
Author(s):  
Wei Bo ◽  
Guang Yu Tan ◽  
Lin Lin Guo ◽  
Guang Hui Li
Keyword(s):  
Temperature Field ◽  
Heat Source ◽  
High Speed ◽  
Cutting Temperature ◽  
Helical Coil ◽  
End Mill ◽  
Dynamic Temperature ◽  
Solid Carbide ◽  
End Mills ◽  
Coil Heat

Cutting temperature is a key factor in impacting the solid carbide end mill’s life, the rule of solid carbide end mill temperature field is the research focus. In this paper, the solid carbide end mill helical side edge is regarded as a helical coil heat source, the tool chip friction surface is considered as a surface heat source which consists of countless helical coil heat source. Based on heat source method, the model of continuous dynamic temperature field simulation of a solid carbide end mills cutting process is established.

scholarly journals The Thermal—Flow Processes and Flow Pattern in a Pulsating Heat Pipe—Numerical Modelling and Experimental Validation

Energies ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5952
Author(s):  
Przemysław Błasiak ◽  
Marcin Opalski ◽  
Parthkumar Parmar ◽  
Cezary Czajkowski ◽  
Sławomir Pietrowicz
Keyword(s):  
Heat Pipe ◽  
High Speed ◽  
Numerical Models ◽  
Input Parameter ◽  
Experimental Studies ◽  
Internal Flow ◽  
Numerical Analyses ◽  
Flow Structures ◽  
Pulsating Heat Pipe ◽  
Fixed Temperature

The aim of the article is to numerically model a two-dimensional multiphase flow based on the volume of fluid method (VOF) in a pulsating heat pipe (PHP). The current state of knowledge regarding the modeling of these devices was studied and summarised. The proposed model is developed within open source software, OpenFOAM, based on the predefined solver called interPhaseChangeFoam. The analyses were carried out in terms of the influence of four different mass transfer models between the phases, proposed by Tanasawa, Lee, Kafeel and Turan, and Xu et al. on the shape and dynamics of the internal flow structures. The numerical models were validated against data obtained from a specially designed experimental setup, consisting of three bends of pulsating heat pipes. The numerical calculations were carried out with ethanol being treated as a working medium and the initial and boundary conditions taken directly from the measurement procedures. The variable input parameter for the model was the heat flux implemented in the evaporation section and a fixed temperature applied to the condensation section. The flow structures obtained from the numerical analyses were compared and discussed with the flow structures gained from experimental studies by employing a high speed camera. In addition, to verify the quantitative results obtained from the numerical analyses with the experimental data, a technique called particle image velocimetry (PIV) was used for the velocity vector field. For the analysed velocity ranges, the relative error obtained was reached at the level of 10%.

Prediction of Temperature Distribution in High-Speed End Mill Assisted by Heat Pipe Cooling

2011 ◽  
Vol 311-313 ◽  
pp. 2371-2374
Author(s):  
Hua Wei Ju ◽  
Wei Xiao Tang ◽  
Qing Hua Song ◽  
Hong Liang Zhou
Keyword(s):  
Temperature Distribution ◽  
Heat Pipe ◽  
High Speed ◽  
Metal Cutting ◽  
Cutting Temperature ◽  
Dimensional Accuracy ◽  
Machining Process ◽  
Clear Understanding ◽  
End Mill ◽  
Heat Transfer Theory

The cutting temperature is a key factor which directly affects thermal distortion, the machined part’s dimensional accuracy, as well as the tool wear in machining process. Aiming to effectively remove the cutting heat yields in machining process, the cutting tool with heat pipe cooling has been developed in recent years. This research focuses on developing a clear understanding of the temperature distribution in end mill embedded with heat pipe. Mathematical model is developed based on the heat transfer theory and the metal-cutting theory. 3-D finite element models are set up. The thermal boundary conditions are properly set, and contrasts of the temperature field in end mill with and without embedded heat pipes by numerical simulations are given.

Resistance Coefficient Research of the Train Air Supply Orifice

2012 ◽  
Vol 614-615 ◽  
pp. 475-479
Author(s):  
Hai Ying Wang ◽  
Chun Fang Li ◽  
Song Tao Hu ◽  
Lin Song
Keyword(s):  
Experimental Study ◽  
Temperature Field ◽  
Air Conditioning ◽  
High Speed ◽  
Plate Thickness ◽  
Resistance Coefficient ◽  
High Speed Train ◽  
Air Conditioning System ◽  
Air Supply ◽  
Air Conditioning Systems

High-speed train air-conditioning systems put forward higher request on the aspect of air uniformity and comfort. The use of orifice which can form a more uniform velocity and temperature field in the car can be widely applied to high-speed train air-conditioning system. The experimental study of the influence of several different factors (such as the opening rate, aperture, orifice plate thickness, etc.) in the research may provide a reference for the design choices of the orifice type.

Numerical Simulation of Heat Pipe Cooling in End Milling Operations: Part I—Thermal, Structural Static, and Dynamic Analyses

2010 ◽  
Author(s):  
Lin Zhu ◽  
Tien-Chien Jen ◽  
Yi-Hsin Yen
Keyword(s):  
Finite Element ◽  
Heat Pipe ◽  
End Milling ◽  
Milling Process ◽  
End Mill ◽  
Element Analysis ◽  
Explicit Finite Element ◽  
Numerical Studies ◽  
Milling Operations ◽  
Explicit Finite Element Analysis

In this paper, the feasibility and effectiveness of heat pipe cooling in end milling operations is investigated. A new embedded heat pipe technology was used to remove the heat generated at the tool-interface in the end milling process. Numerical studies were involved in four cases, including solid end-mill, solid end-mill with coolant, heat pipe end-mill and heat pipe end-mill with coolant. The thermal, static and dynamic characteristics of the end-mill were investigated using a numerical calculation with Fast Finite Element (FFE) plus solvers based on explicit finite element analysis software. The results indicate the heat pipe end-mill is most feasible and effective in the actual end milling processes.

Feasibility and Effectiveness of Heat Pipe Cooling in End Milling Operations: Thermal, Structural Static, and Dynamic Analyses: A New Approach

2011 ◽  
Vol 133 (5) ◽  
Author(s):  
Lin Zhu ◽  
Tien-Chien Jen ◽  
Yi-Hsin Yen ◽  
Xiao-Ling Kong
Keyword(s):  
Finite Element ◽  
Heat Pipe ◽  
End Milling ◽  
Cutting Fluid ◽  
End Mill ◽  
Element Analysis ◽  
Explicit Finite Element ◽  
Numerical Studies ◽  
Milling Operations ◽  
Explicit Finite Element Analysis

In this paper, the feasibility and effectiveness of heat pipe cooling in end milling operations are investigated. A new embedded heat pipe technology was utilized to remove the heat generated at the tool-interface in end milling processes. Numerical studies involved four cases, including dry milling, fluid cooling, heat pipe cooling, and heat pipe cooling with cutting fluid supplied. The thermal, structural static, and dynamic characteristics of the end-mill were investigated using a numerical calculation with fast finite element plus solvers based on explicit finite element analysis software. The results demonstrate that the heat pipe end-mill is most feasible and effective in the actual end milling processes.

Research on Transient Temperature Field Modeling and Simulation of Flat End Mill for High Speed Milling

2013 ◽  
Vol 415 ◽  
pp. 677-680
Author(s):  
Guang Yu Tan ◽  
Da Peng Li ◽  
Dong Chen ◽  
Zhen Yu Wang ◽  
Guang Hui Li
Keyword(s):  
Temperature Field ◽  
Heat Source ◽  
High Speed ◽  
Field Model ◽  
Depth Of Cut ◽  
Transient Temperature ◽  
End Mill ◽  
Line Heat Source ◽  
Transient Temperature Field ◽  
Temperature Field Model

In order to reveal the breakage mechanism of flat end mill under periodic thermal shock, transient temperature field model of chisel edge were established by heat source method, transient temperature field model of side edge were established along the sliced differential elements from the bottom of the flute toward the final axial depth of cut by means of line heat source. The simulation results show that transient temperature field prediction model can be used for prediction transient temperature field in high speeding.

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