Study on mathematical model of cutting force in micromachining

2015 ◽  
Vol 06 (04) ◽  
pp. 1550039
Author(s):  
Zhen Yu ◽  
Quan-Jie Gao ◽  
Ding-Fang Chen
Keyword(s):  
Cutting Force ◽  
Cutting Tool ◽  
Small Deformation ◽  
Surface Friction ◽  
Force Model ◽  
Gradient Plasticity ◽  
Cutting Force Model ◽  
Cutting Depth ◽  
Micro Cutting ◽  
Extrusion Mechanism

With the development of micromachining technology, it is very important to study the mechanism of micromachining, determine the micromachining parameters and ensure the products’ quality during the micromachining process. Combined with the micro-mechanism between tool and workpiece during micromachining process, the sources of the micro-cutting force were analyzed, the micro-cutting physical model was constructed, and the microstress model interacted between the cutting arc edge of the tool and the material of the workpiece was analyzed. Combined with the surface friction and elastic extrusion mechanism between the cutting tool and workpiece, the micro-cutting force model was constructed from two aspects. The micro-cutting depth is deeper than the minimum cutting depth and the micro-cutting depth is shallower than the minimum cutting depth, then the minimum cutting depth value was calculated. Combined with the dislocation properties and microcrystal structure of workpiece’s material, the internal stress of the micromachining force model based on the gradient plasticity theory was calculated, and the force model of the micro-cutting process was studied too. It is significant to control the precision of micromachining process during the micromachining process by constructing the micromachining process force model through studying the small deformation of the material and the mechanism of micromachining.

Prediction of Forces in Micro-Cutting and the Study Based on Simulation

2011 ◽  
Vol 467-469 ◽  
pp. 197-201 ◽  
Author(s):  
H. Xiao ◽  
Wen Ge Wu ◽  
W.T. Mei
Keyword(s):  
Cutting Force ◽  
Strain Gradient ◽  
Cutting Parameters ◽  
Effect Of Temperature ◽  
Gradient Plasticity ◽  
Cutting Depth ◽  
Micro Cutting ◽  
Linear Mode ◽  
Deformation Area ◽  
Temperature Area

In micro-cutting process, a remarkable characteristic of micro-Cutting is that cutting parameters level closing to the crystal grain msize of material. Though, the prediction formula of micro-cutting forces should reference to strain gradient plasticity theory in formula construction , while cutting edge radius had been regard as a important parameters in the process of micro-cutting. With advantedge FEM software for simulation of micro-cutting , the results show that, there was no significant effect of temperature on cutting force; strain gradient reaction will be decreased by feed rate’s reducing in process, cutting depth effected cutting force in linear mode, the max. workpiece temperature area is no longer the second deformation area but the primary deformation zone, while the max. temperature area of the tool would transfer to the tool tip from theoretical location of traditional cutting.

scholarly journals Research on Prediction Model of Conical Pick Cutting Force Based on Coulomb-Mohr Criterion

2020 ◽  
Vol 319 ◽  
pp. 04001
Author(s):  
S.J. Wang ◽  
X.M. Zong ◽  
B. He ◽  
K.X. Kang
Keyword(s):  
Cutting Force ◽  
Influence Factors ◽  
Calculation Model ◽  
Orthogonal Test ◽  
Force Model ◽  
Cutting Force Model ◽  
Cutting Depth ◽  
Conical Pick ◽  
Engineering Data ◽  
Result Show

Cutting force is one of the most important influence factors that affect the efficiency and service life of the conical pick. In order to accurately calculate the cutting force, through theoretical analysis and experimental research, a cutting force model consisted of the basic fracture parameters of rock, geometric parameters and installation parameters of pick is proposed based on the coulomb-mohr criterion, and the calculation model is corrected by whole cutting experimental data, and validated the corrected model by orthogonal test, the result show that the error of the cutting force model is about 10%, which meets the requirements of engineering data. At the same time, significant analysis on the cutting force is obtained by range method, cutting depth h > semi-tip angle β > cutting angle α.

scholarly journals Micro cutting force model of micro-jet induced by cavitation collapse in the ultrasonic field at micro-nano scale

2021 ◽  
Author(s):  
Linzheng Ye ◽  
Xijing Zhu ◽  
Yan He
Keyword(s):  
Size Effect ◽  
Cutting Force ◽  
Test Theory ◽  
Impact Pressure ◽  
Force Model ◽  
Cutting Force Model ◽  
Micro Cutting ◽  
Cavitation Effect ◽  
Pit Depth ◽  
The Impact

Abstract The micro-jet is the main mechanism of cavitation on materials. More and more ultrasonic cavitation assisted machining uses the micro-jet effect in the industrial field. In this paper, the micro-jet impact is considered as the micro cutting process. To deeply analyze the micro cutting mechanism of micro-jet, the size effect of materials was considered, and the micro cutting force model of micro-jet was established and solved based on the spherical indentation test theory and the strain gradient plasticity theory. The results showed that the micro cutting force and impact pressure of micro-jet with size effect are larger than those without size effect, and the micro cutting force of single micro-jet is within 2.35 N. The micro cutting force of micro-jet increases exponentially with the increase of pit radius, but only slightly increases with the increase of pit depth. When the size effect is considered or not, the impact pressure of micro-jet is 1616-2922 MPa or 1615-1980 MPa, respectively. The increase ratio of micro cutting force with size effect is , which can directly reflect the strength of size effect. The size effect is more obvious when the pit size is smaller, and the maximum increase ratio is 47.54%.The increase ratio increases nonlinearly with the decrease of pit radius and increases with the increase of pit depth. It has a strong correlation with pit radius and pit depth. This paper can provide a new theoretical viewpoint and support for the quantitative description of cavitation effect in ultrasonic assisted machining.

scholarly journals Cutting Force Model for Thermal-Assisted Machining of Tool Steel Based on the Taguchi Method

Metals ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 992 ◽  
Author(s):  
Mac Thi-Bich ◽  
Dinh Van-Chien ◽  
Banh Tien-Long ◽  
Nguyen Duc-Toan
Keyword(s):  
Taguchi Method ◽  
Cutting Force ◽  
Tool Steel ◽  
Feed Rate ◽  
Elevated Temperatures ◽  
Cutting Speed ◽  
Force Model ◽  
Cutting Force Model ◽  
Cutting Depth ◽  
Study Results

This paper investigates cutting force in thermal-assisted machining (TAM) by induction heating for SKD11 tool steel which is widely used in the mold industry. Experimental studies were first conducted at room and elevated temperatures to evaluate the effectiveness of the heating process on chip morphology and the cutting forces during the thermal-assisted machining and comparing with conventional machining method. The Taguchi method based on orthogonal array and analysis of variance ANOVA method was then used to design the number of experiments and evaluate the influence of cutting speed, feed rate, cutting depth, and elevated temperature on the cutting force. Study results showed a decrease in the cutting force in the TAM process. The optimal condition of parameters obtained for thermal-assisted machining were cutting speed 280 m/min, feed rate 230 mm/min, cutting depth 0.5 mm and temperature 400 °C. Finally, a proposed equation was established to determine the cutting force that was presented as a function of elevated temperatures when milling SKD11 material. A proposed cutting force model was compared, evaluated and confirmed to be in good agreement with experimental results.

3D Cutting Force Model of a Stinger PDC Cutter: Considering Confining Pressure and the Thermal Stress

2021 ◽  
Author(s):  
Chao Xiong ◽  
Zhongwei Huang ◽  
Huaizhong Shi ◽  
Ruiyue Yang ◽  
Xianwei Dai ◽  
...  
Keyword(s):  
Thermal Stress ◽  
Cutting Force ◽  
Confining Pressure ◽  
Force Model ◽  
Cutting Force Model
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