scholarly journals Studying of Technological Characteristics in Cutting Zone by Multifunction Measuring System

2012 ◽  
Vol 9 (2) ◽  
pp. 38-42
Author(s):  
Michal Šajgalík ◽  
Andrej Czán ◽  
Marek Szigety ◽  
Róbert Bobrovský
Keyword(s):  
Temperature Field ◽  
Cutting Force ◽  
Cutting Process ◽  
Machining Process ◽  
Measuring System ◽  
Technological Characteristics ◽  
Comprehensive Information ◽  
Cutting Zone

Abstract In this manuscript are described and evaluated processes in cutting zone during machining process by turning based on the results of the multifunction measuring system. This system consists of three different measuring units, which allow to measure and monitor processes in the cutting zone, such as size of components of cutting force, temperature field and its evolution during the cutting process, etc. The results as the data from each unit of multifunction measuring system provide detailed and comprehensive information about processes in cutting zone during the machining and they help to better knowledge of processes in cutting zone during the machining.

Numerical Simulation of Metal Cutting Process Based on ANSYS/LS-DYNA

2015 ◽  
Vol 727-728 ◽  
pp. 335-338 ◽  
Author(s):  
Song Jie Yu ◽  
Di Di Wang ◽  
Xin Chen
Keyword(s):  
Cutting Force ◽  
Metal Cutting ◽  
Plastic Material ◽  
Orthogonal Cutting ◽  
Cutting Process ◽  
Machining Process ◽  
Linear Deformation ◽  
Deformation Problem ◽  
Non Linear ◽  
Elastic Plastic Material

Cutting process is a typical non-linear deformation problem, which involves material non-linear, geometry non-linear and the state non-linear problem. Based on the elastic-plastic material deformation theory, this theme established a strain hardening model. Build the simulation model of two-dimensional orthogonal cutting process of workpiece and tool by the finite element method (FEM), and simulate the changes of cutting force and the process of chip formation in the machining process, and analyzed the cutting force, the situation of chip deformation. The method is more efficient and effective than the traditional one, and provides a new way for metal cutting theory, research of material cutting performance and cutting tool product development.

Cutting Force and Friction Modelling in High Speed End-Milling

2015 ◽  
Author(s):  
Sunday J. Ojolo ◽  
Olumuwiya Agunsoye ◽  
Oluwole Adesina ◽  
Gbeminiyi M. Sobamowo
Keyword(s):  
Temperature Field ◽  
Temperature Distribution ◽  
Cutting Forces ◽  
High Speed ◽  
Metal Cutting ◽  
Cutting Tool ◽  
End Milling ◽  
Cutting Process ◽  
Machining Process ◽  
Work Piece

Temperature field in metal cutting process is one of the most important phenomena in machining process. Temperature rise in machining directly or indirectly determines other cutting parameters such as tool life, tool wear, thermal deformation, surface quality and mechanics of chip formation. The variation in temperature of a cutting tool in end milling is more complicated than any other machining operation especially in high speed machining. It is therefore very important to investigate the temperature distribution on the cutting tool–work piece interface in end milling operation. The determination of the temperature field is carried out by the analysis of heat transfer in metal cutting zone. Most studies previously carried out on the temperature distribution model analysis were based on analytical model and with the used of conventional machining that is continuous cutting in nature. The limitations discovered in the models and validated experiments include the oversimplified assumptions which affect the accuracy of the models. In metal cutting process, thermo-mechanical coupling is required and to carry out any temperature field determination successfully, there is need to address the issue of various forces acting during cutting and the frictional effect on the tool-work piece interface. Most previous studies on the temperature field either neglected the effect of friction or assumed it to be constant. The friction model at the tool-work interface and tool-chip interface in metal cutting play a vital role in influencing the modelling process and the accuracy of predicted cutting forces, stress, and temperature distribution. In this work, mechanistic model was adopted to establish the cutting forces and also a new coefficient of friction was also established. This can be used to simulate the cutting process in order to enhance the machining quality especially surface finish and monitor the wear of tool.

scholarly journals The Effect of Cutting Fluids and Cutting Speeds to The Vibrations of Milling CNC Machine

2017 ◽  
Vol 16 (2) ◽  
Author(s):  
A Muhammad Fuad Nur Rochim ◽  
Indri Yaningsih ◽  
Heru Sukanto
Keyword(s):  
Cutting Force ◽  
External Force ◽  
Face Milling ◽  
Cutting Process ◽  
Machining Process ◽  
Cutting Fluids ◽  
Cnc Machine ◽  
Accelerometer Sensor ◽  
Slot Milling ◽  
Cutting Speeds

Vibration that occur in machining process is forced vibration. This vibration caused by external force excitation. External force that cause vibration in machining process is cutting force. This research was aims to determine the effect of cutting fluids and cutting speeds to vibration in milling process. The specimens were made using a cutting process type face milling, profile milling, pocket milling, and slot milling. Cutting speeds was variated at 62.83 m/min; 110 m/min; 157.14 m/min; 188.5 m/min. Vibration testing was done using the accelerometer sensor. Vibration response taken is the amplitude. The results show any type of cutting process has a different amplitude. Face milling has the smallest amplitude while slot milling has the biggest one. At cutting speeds parameter, the faster of cutting speeds the smaller of the amplitude. The use of cutting fluids can reduce the friction value between cutting tool and workpiece so that the cutting force will decrease. The use of cutting fluids causing the smaller the cutting force. The increase of the cutting force will cause greater vibration

The Research on Cutting Force in High-Speed Milling Process of Aluminum Alloy Impeller

2010 ◽  
Vol 142 ◽  
pp. 11-15 ◽  
Author(s):  
Y.B. Liu ◽  
C. Zhao ◽  
X. Ji ◽  
Ping Zhou
Keyword(s):  
Aluminum Alloy ◽  
Cutting Force ◽  
High Speed ◽  
Test Method ◽  
Cutting Process ◽  
Machining Process ◽  
High Speed Milling ◽  
High Speed Cutting ◽  
Five Axis ◽  
Cutting Path

High-speed cutting process of cutting force influence variables and variation and ordinary speed cutting are obviously different, in order to study the high-speed cutting process of different parameters on the effect of cutting force, based on five axis high-speed NC machining center, using multi-factor orthogonal test method for high speed milling of aluminum alloy impeller conducted experiments. It was analyzed that cutting force influence factors of 5-axises blade machining process. A private clamp was designed and produced, to measure the cutting force of machining process. It was observe that distribution of 3-dimension cutting forces in cutting path. It was found that the distribution rule of cutting force. With the experiment study on cutting force when high speed cutting aluminum cuprum, the influence disciplinarian of each cutting parameter on cutting force was obtained.

scholarly journals Finishing Titanium Alloy Cutting Zone Analysis Via Multifunction Measuring System

2015 ◽  
Vol 12 (1) ◽  
pp. 31-33 ◽  
Author(s):  
Czán Andrej ◽  
Šajgalík Michal ◽  
Mário Drbúl ◽  
Jozef Holubják ◽  
Jozef Mrázik ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Cutting Forces ◽  
Machining Process ◽  
Measuring System ◽  
Machining Processes ◽  
Simultaneous Observation ◽  
Thermal Spread ◽  
Cutting Zone ◽  
Biomedical Industry

Abstract With the development of automotive, aerospace and biomedical industry, there is higher demand for exotic alloys, often based on titanium or nickel, though they are hard to machine. Therefore, it is essential to thoroughly understand their behavior during machining. Processes in the cutting zone of said materials are due to the complexity and dynamics defined by specific models. These include some deviations, thus it is essential to improve machining observation methodology, so exhibited errors and deviations are minimal or none. Based on the observations, multifunction measuring system has been designed, which allows simultaneous observation of characteristics such as e.g. cutting forces, deformations and thermal spread without uninterrupting machining process.

Simulation of Cutting Force in Turning Machining Process on CK7815 NC Lathe

2008 ◽  
Vol 392-394 ◽  
pp. 64-68 ◽  
Author(s):  
Yu Hong Dong ◽  
H.T. Xu ◽  
H. Lin
Keyword(s):  
Cutting Force ◽  
Nc Machining ◽  
Cutting Process ◽  
Machining Process ◽  
Work Piece ◽  
Spring Stiffness ◽  
Load Torque ◽  
Machining Precision ◽  
Radial Error ◽  
Feed Drive System

In order to improve NC machining precision this article analyzes the effects of cutting force on NC machining precision by means of simulation, and builds up the mathematical models of CK7815 feed drive system and radial action force of cutting feed, in order to study the effects of cutting load torque and radial cutting force on work pieces processing precision. The simulation results illustrate that cutting load torque and radial cutting force have respectively effects on axial precision and radial precision of work piece. The bigger is cutting load torque, the bigger is axial error. The smaller is cutting process coefficient and the higher is converting spring stiffness of lathe and tool, the smaller is radial error. In practice NC machining precision is improved by trying to decrease the cutting load torque and cutting process coefficient and increase converting spring stiffness.

scholarly journals Study on Deformation and Compensation for Micromilled Thin Walls With High Aspect Ratios

2021 ◽  
Author(s):  
Yang Li ◽  
Xiang Cheng ◽  
Siying Ling ◽  
Guangming Zheng ◽  
Lei He
Keyword(s):  
Cutting Force ◽  
Force Measurement ◽  
Dimensional Accuracy ◽  
Cutting Process ◽  
Machining Process ◽  
Thin Wall ◽  
Cutting Parameter ◽  
Thin Walls ◽  
Aspect Ratios ◽  
Wall Deformation

Abstract In order to further improve the dimensional accuracy of micromilled thin walls with high aspect ratios, the machining process should be actively controlled. An active cutting force measurement and cutting parameter compensation device is developed to realize the real-time measurement of radial cutting forces and compensation of radial cutting parameters in thin wall cutting process. Firstly, based on the cantilever beam deformation theory, a mathematical model is established to calculate the deformation and cutting force of thin walls. By measuring the cutting force, the thin wall deformation in the cutting process could be estimated. Then, the obtained incremental thin wall deformation is to be compared with the compensation threshold, which is set at 0.5 μm. If the value of the incremental deformation is less than 0.5 μm, compensation will not be processed. Otherwise, the incremental deformation is used as the compensation value for iterative compensation, until the incremental deformation of the thin wall is less than 0.5 μm. At last, a contrast experiment is carried out. The experimental results show that the introduced device and method are feasible. Machining quality of the thin wall has been obviously improved in dimension precision after the cutting parameter compensations.

Determination of cutting force of roll-formed section in shaped dies-knife guillotine

2020 ◽  
pp. 373-376
Author(s):  
S.V. Povorov ◽  
D.V. Egorov ◽  
D.S. Volgin
Keyword(s):  
Cutting Force ◽  
Cutting Process ◽  
Sheet Blank

The change in cutting force in the cutting process of roll-formed section in shaped dies-knife guillotine is studied. It is established that to calculate the cutting force in shaped guillotine, one can use formulas to determine the cutting force of sheet blank on conventional straight knives guillotine.

scholarly journals Serrated Chips Formation in Micro Orthogonal Cutting of Ti6Al4V Alloys with Equiaxial and Martensitic Microstructures

Micromachines ◽  
2019 ◽  
Vol 10 (3) ◽  
pp. 197 ◽  
Author(s):  
ZeJia Zhao ◽  
Suet To ◽  
ZhuoXuan Zhuang
Keyword(s):  
Cutting Force ◽  
Unit Length ◽  
Orthogonal Cutting ◽  
Machining Process ◽  
Orthogonal Machining ◽  
Large Yield ◽  
Power Spectral ◽  
Straight Line ◽  
Serrated Chips ◽  
Electropulsing Treatment

The formation of serrated chips is an important feature during machining of difficult-to-cut materials, such as titanium alloy, nickel based alloy, and some steels. In this study, Ti6Al4V alloys with equiaxial and acicular martensitic microstructures were adopted to analyze the effects of material structures on the formation of serrated chips in straight line micro orthogonal machining. The martensitic alloy was obtained using highly efficient electropulsing treatment (EPT) followed by water quenching. The results showed that serrated chips could be formed on both Ti6Al4V alloys, however the chip features varied with material microstructures. The number of chip segments per unit length of the alloy with martensite was more than that of the equiaxial alloy due to poor ductility. Besides, the average cutting and thrust forces were about 8.41 and 4.53 N, respectively, for the equiaxed Ti6Al4V alloys, which were consistently lower than those with a martensitic structure. The high cutting force of martensitic alloy is because of the large yield stress required to overcome plastic deformation, and this force is also significantly affected by the orientations of the martensite. Power spectral density (PSD) analyses indicated that the characteristic frequency of cutting force variation of the equiaxed alloy ranged from 100 to 200 Hz, while it ranged from 200 to 400 Hz for workpieces with martensites, which was supposedly due to the formation of serrated chips during the machining process.

scholarly journals Modeling of Cutting Force in the Turning of AISI 4340 Using Gaussian Process Regression Algorithm

2021 ◽  
Vol 11 (9) ◽  
pp. 4055
Author(s):  
Mahdi S. Alajmi ◽  
Abdullah M. Almeshal
Keyword(s):  
Gaussian Process ◽  
Cutting Force ◽  
Predictive Accuracy ◽  
Gaussian Process Regression ◽  
Machining Process ◽  
Support Vector ◽  
Process Data ◽  
Cutting Force Prediction ◽  
Artificial Neural Network Ann ◽  
Aisi 4340

Machining process data can be utilized to predict cutting force and optimize process parameters. Cutting force is an essential parameter that has a significant impact on the metal turning process. In this study, a cutting force prediction model for turning AISI 4340 alloy steel was developed using Gaussian process regression (GPR), support vector machines (SVM), and artificial neural network (ANN) methods. The GPR simulations demonstrated a reliable prediction of surface roughness for the dry turning method with R2 = 0.9843, MAPE = 5.12%, and RMSE = 1.86%. Performance comparisons between GPR, SVM, and ANN show that GPR is an effective method that can ensure high predictive accuracy of the cutting force in the turning of AISI 4340.

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