A theoretical model to study the cutting force characteristics in remanufacturing turning of laser cladded coatings

2021 ◽  
Author(s):  
Peirong Zhang ◽  
Jin Du ◽  
Jingjie Zhang ◽  
Guosheng Su ◽  
Chonghai Xu
Keyword(s):  
Theoretical Model ◽  
Cutting Force ◽  
Force Characteristics

Research on Milling Force in Ultrasonic Assisted End Milling of Titanium Alloy Thin-Walled Parts

2018 ◽  
Vol 764 ◽  
pp. 252-260
Author(s):  
Feng Jiao ◽  
Cheng Lin Yao ◽  
Li Zhao ◽  
Feng Qi
Keyword(s):  
Titanium Alloy ◽  
Cutting Force ◽  
Ultrasonic Vibration ◽  
End Milling ◽  
Signal To Noise Ratio ◽  
Milling Force ◽  
Alloy Material ◽  
Ultrasonic Assisted ◽  
Thin Walled ◽  
Force Characteristics

Hard machinability of titanium alloy material and poor stiffness of thin-walled part restricted the extensive applications of titanium alloy thin-walled component in aerospace engineering. In order to increase geometric accuracy, a method of ultrasonic vibration assisted (UVA) end milling technology with workpiece vibrating in feeding direction was put forward in this paper, and the corresponding milling force characteristics in UVA milling of titanium alloy TC4 thin-walled workpiece were researched. Through theoretical analysis, the path of cutter tooth in UVA milling was analyzed. The important factors that affect milling force are obtained with the signal to noise ratio analysis. Results show that the radial cutting force in UVA milling is smaller than that in traditional milling. Cutting force fluctuate in high frequency when treated ultrasonic vibration. And the axial cutting feed is the core factor that affects the milling force. The research provides a certain reference for the precision milling of titanium alloy thin-walled parts.

Development of the Two-Dimensional Ultrasonic Cutting System Based on the Mechanism of Single-Excitation Elliptical Vibration by Means of Opening Chutes on the Horn

2016 ◽  
Vol 693 ◽  
pp. 1272-1278
Author(s):  
Jie Li ◽  
Feng Jiao ◽  
Ying Niu ◽  
Long Fei Shi
Keyword(s):  
Cutting Force ◽  
Ultrasonic Vibration ◽  
Two Dimensional ◽  
Vibration Cutting ◽  
Elliptical Vibration ◽  
Cutting Experiments ◽  
Cutting System ◽  
Ultrasonic Vibration Cutting ◽  
Ultrasonic Cutting ◽  
Force Characteristics

Based on the mechanism of single-excitation elliptical vibration by means of opening chutes on the horn, a novel two-dimensional ultrasonic cutting system was developed. Vibration characteristics of the two-dimensional ultrasound cutting system were researched and the longitudinal and bending amplitude of the system with different number of chutes were obtained. By using developed two-dimensional ultrasonic vibration cutting systems, series of cutting experiments were carried out and cutting force characteristics were researched compared with that in traditional cutting.

A Theoretical Model for Estimating the Peak Cutting Force of Conical Picks

2018 ◽  
Vol 58 (5) ◽  
pp. 709-720 ◽  
Author(s):  
X. Li ◽  
S. Wang ◽  
S. Ge ◽  
R. Malekian ◽  
Z. Li
Keyword(s):  
Theoretical Model ◽  
Cutting Force ◽  
Conical Picks

An Intelligent Tool Post in a Lathe

2006 ◽  
Vol 505-507 ◽  
pp. 1009-1014
Author(s):  
C.L. Wu ◽  
K.S. Wang
Keyword(s):  
Taguchi Method ◽  
Cutting Force ◽  
Experimental Results ◽  
Cutting Conditions ◽  
Design Equation ◽  
Design Requirements ◽  
Set Up ◽  
Force Characteristics ◽  
Operating Equation

An Intelligent Tool Post (ITP) used in lathe is proposed in this study. ITP is designed from the basis of two different cutting force characteristics produced from abnormal cutting generated by tool crashing workpiece and from normal cutting. ITP is capable of sensing and distinguishing the normal cutting signals from the abnormal ones. During normal cutting, ITP is able to resist the cutting torque and continue the cutting. As abnormal cutting occurs, the tool would move away from the workpiece without any damage. The equations for design and operation have been established. With the threshold and the design equation, one can design appropriate ITP. The threshold can be calculated and set up by the operating equation and the cutting conditions. Furthermore, Taguchi method was employed to conduct the experiments and analyze the experimental results. The results showed that the ITP’s functions met the design requirements completely.

Research on Cutting Force Characteristics of Laser and Ultrasonic Assisted Cutting of Sintered Tungsten Carbide with FEA Method

2013 ◽  
Vol 770 ◽  
pp. 272-275 ◽  
Author(s):  
Feng Jiao ◽  
Feng Bian Li ◽  
Peng Duan
Keyword(s):  
Tungsten Carbide ◽  
Cutting Force ◽  
Vibration Frequency ◽  
Laser Heating ◽  
Heating Temperature ◽  
Vibration Cutting ◽  
Elliptical Vibration ◽  
Ultrasonic Assisted ◽  
Ultrasonic Elliptical Vibration ◽  
Force Characteristics

Based on the application of elliptical vibration cutting method to precision machining of hard and brittle materials and material softening technology through laser heating, a novel composite cutting technique, laser heating and ultrasonic elliptical vibration assisted cutting, is applied to process sintered tungsten carbide. The simulation of the orthogonal cutting process and the effect of frequency and amplitude of vibration and laser heating temperature on cutting force are discussed by using FEA method. Research results have revealed that the main peak of the transient force components increase with the increase of vibration frequency, decrease with the increase of vibration amplitude and laser heating temperature. Moreover, the friction reversal phenomenon is improved with the increase of vibration frequency and amplitude, resulting in the decrease of average cutting force. Compared to common cutting and traditional one-dimensional ultrasonic vibration cutting, the composite cutting technology put forward in this paper has unique cutting force characteristics for such super hard material because of combined action of friction reversal and intermittence cutting for ultrasonic elliptical vibration and material softening for laser heating. The research in the paper has provided a practical reference for the further experiments of laser and ultrasonic assisted cutting.

A Rotary Magnetorheological Damper for a Tracked Vehicle

2011 ◽  
Vol 328-330 ◽  
pp. 1135-1138 ◽  
Author(s):  
Lin Yang ◽  
Si Zhong Chen ◽  
Bin Zhang ◽  
Zhan Zong Feng
Keyword(s):  
Theoretical Model ◽  
Mr Damper ◽  
Magnetorheological Damper ◽  
Damping Capacity ◽  
Harmonic Loading ◽  
Finite Element Software ◽  
Working Principle ◽  
Full Optimization ◽  
Loading Tests ◽  
Force Characteristics

A rotary magnetorheological (MR) damper for a semi-active suspension was developed, laboratory tested. The working principle and features of the rotary MR damper was outlined and its theoretical model was developed. Full optimization of the magnetic design was accomplished with the help of magnetic finite element software ANSYS in the limited space. The parameters of the MR damper’s theoretical model were identified by a series of harmonic loading tests. It is demonstrated that the damping capacity of this MR damper is a function of strain amplitude and field strength, and it is feasible to use for the life application in terms of force characteristics.

scholarly journals Estimates of the bistable region in metal cutting

2008 ◽  
Vol 464 (2100) ◽  
pp. 3255-3271 ◽  
Author(s):  
Zoltan Dombovari ◽  
R. Eddie Wilson ◽  
Gabor Stepan
Keyword(s):  
Cutting Force ◽  
Metal Cutting ◽  
Classical Model ◽  
Orthogonal Cutting ◽  
Chip Thickness ◽  
Stability Limit ◽  
Force Characteristic ◽  
Inflexion Point ◽  
The Stability ◽  
Force Characteristics

The classical model of regenerative vibration is investigated with new kinds of nonlinear cutting force characteristics. The standard nonlinear characteristics are subjected to a critical review from the nonlinear dynamics viewpoint based on the experimental results available in the literature. The proposed nonlinear model includes finite derivatives at zero chip thickness and has an essential inflexion point. In the case of the one degree-of-freedom model of orthogonal cutting, the existence of unstable self-excited vibrations is proven along the stability limits, which is strongly related to the force characteristic at its inflexion point. An analytical estimate is given for a certain area below the stability limit where stable stationary cutting and a chaotic attractor coexist. It is shown how this domain of bistability depends on the theoretical chip thickness. The comparison of these results with the experimental observations and also with the subcritical Hopf bifurcation results obtained for standard nonlinear cutting force characteristics provides relevant information on the nature of the cutting force nonlinearity.

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