Crystal anisotropy-dependent shear angle variation in orthogonal cutting of single crystalline copper

2020 ◽  
Vol 63 ◽  
pp. 41-48 ◽  
Author(s):  
Zhanfeng Wang ◽  
Junjie Zhang ◽  
Zongwei Xu ◽  
Jianguo Zhang ◽  
Guo Li ◽  
...  
Keyword(s):  
Orthogonal Cutting ◽  
Shear Angle ◽  
Angle Variation ◽  
Single Crystalline ◽  
Crystal Anisotropy

scholarly journals Experimental investigation of the shear angle variation during orthogonal cutting

2018 ◽  
Vol 5 (13) ◽  
pp. 26495-26500 ◽  
Author(s):  
Szabolcs Berezvai ◽  
Tamas G. Molnar ◽  
Daniel Bachrathy ◽  
Gabor Stepan
Keyword(s):  
Experimental Investigation ◽  
Orthogonal Cutting ◽  
Shear Angle ◽  
Angle Variation

Governing Equations of the Shear Angle Oscillation in Dynamic Orthogonal Cutting

1986 ◽  
Vol 108 (4) ◽  
pp. 280-287 ◽  
Author(s):  
D. William Wu
Keyword(s):  
Orthogonal Cutting ◽  
Shear Plane ◽  
Shear Angle ◽  
Governing Equations ◽  
Line Field ◽  
Angle Variation ◽  
Wide Range ◽  
Theoretical Predictions ◽  
Transfer Behavior ◽  
Good Agreement

Chatter is a complex physical process in machining. One of the practical ways of modeling its transfer behavior is to derive the force functions theoretically from the substance of steady state cutting. This often requires a knowledge about the shear angle variation during the process. This paper presents a new method of modeling the angular oscillation in dynamic orthogonal cutting. The system governing equations were derived based on the work-hardening slip-line field theory in cutting mechanics by taking into account the changes of stress conditions on both the shear plane and the tool-chip interface. The result of a simulation study conducted for a wide range of cutting conditions has shown a very good agreement between the theoretical predictions and the existing experimental evidence.

Formation and Simulation of Cutting-Direction Burr in Orthogonal Cutting

2007 ◽  
Vol 24-25 ◽  
pp. 249-254 ◽  
Author(s):  
Hai Jun Qu ◽  
Gui Cheng Wang ◽  
Hong Jie Pei ◽  
Qin Feng Li ◽  
Yun Ming Zhu
Keyword(s):  
Shear Zone ◽  
Formation Process ◽  
Orthogonal Cutting ◽  
Shear Angle ◽  
Burr Formation ◽  
Size And Shape ◽  
Study Results ◽  
Edge Quality ◽  
And Performance ◽  
Cutting Direction

The cutting-direction burr is one of the important factors that influence the edge quality and performance of precision parts. The cutting-direction burr formation process is simulated with DeformTH3D. The mechanism of cutting-direction burr formation is analyzed in terms of the results of the simulation. The negative shear zone and initiation negative shear angle are discussed too. Study results show that the deformation of CDE is an important factor affect the cutting direction burrs’ size and shape.

Cyclic shear angle for lamellar chip formation in ultra-precision machining

2020 ◽  
Vol 234 (13) ◽  
pp. 2673-2680 ◽  
Author(s):  
Shaojian Zhang ◽  
Pan Guo ◽  
Zhiwen Xiong ◽  
Suet To
Keyword(s):  
Chip Formation ◽  
Diamond Tool ◽  
Orthogonal Cutting ◽  
Rake Angle ◽  
Shear Angle ◽  
Precision Machining ◽  
Cyclic Shear ◽  
Intrinsic Mechanism ◽  
Classical Models ◽  
Ultra Precision

Shear angle is classically considered constant. In the study, a series of straight orthogonal cutting tests of ultra-precision machining revealed that shear angle cyclically evolved with each lamellar chip formation, i.e. cyclic shear angle. It grew up from an initial shear angle of 0° to a final shear angle 90°- α ( α: tool rake angle) and underwent a series of transient shear angles like classical shear angles and a critical shear angle. The critical shear angle is the sum of the half of the tool rake angle and the characteristic shear angle determined by material anisotropy without the friction effect. Moreover, a new model was developed. Further, a series of face turning tests of ultra-precision machining verified that the cyclic shear angle was the intrinsic mechanism of cyclic cutting forces and lamellar chip formation to induce twin-peak high-frequency multimode diamond-tool-tip vibration. Significantly, the study draws up an understanding of shear angle for the discrepancy among the classical models.

Investigation of shear angle in orthogonal cutting using FE simulation

2020 ◽  
Vol 2020.69 (0) ◽  
pp. 304
Author(s):  
Takumi KUIKITA ◽  
Makoto NIKAWA ◽  
Minoru YAMASHITA
Keyword(s):  
Fe Simulation ◽  
Orthogonal Cutting ◽  
Shear Angle

An extended shear angle model derived from in situ strain measurements during orthogonal cutting

2013 ◽  
Vol 7 (4) ◽  
pp. 401-408 ◽  
Author(s):  
E. Uhlmann ◽  
S. Henze ◽  
R. Gerstenberger ◽  
K. Brömmelhoff ◽  
W. Reimers ◽  
...  
Keyword(s):  
Orthogonal Cutting ◽  
Shear Angle ◽  
Strain Measurements

Experimental Study on Effects of Feed per Tooth on Shear Angle and Friction Angle in Orthogonal Milling of Titanium Alloy

2014 ◽  
Vol 941-944 ◽  
pp. 1947-1951
Author(s):  
Wan Zhu Liu ◽  
Qiang Liu
Keyword(s):  
Titanium Alloy ◽  
Physical Phenomenon ◽  
Orthogonal Cutting ◽  
Friction Angle ◽  
Milling Process ◽  
Shear Angle ◽  
Experimental Results ◽  
Force Modeling ◽  
Increase With Increase ◽  
Cutting Model

Shear angle and friction angle are the two characteristic parameters in orthogonal cutting model. This paper investigated effects of feed per tooth on shear angle and friction angle in orthogonal milling of titanium alloy Ti6Al4V by experimental approach. Three different straight tooth milling tool with different rake angles are used in this research. Experimental results reveals that in orthogonal milling of Ti6Al4V alloy, shear angle will decrease with increase of feed per tooth and friction angle will increase with increase of feed per tooth. And then variation of shear angle and friction angle affect the values of force coefficients. The experimental results provide deep understand of basic physical phenomenon in milling process and sheds light on more accurate cutting force modeling.

Sign in / Sign up

Export Citation Format

Share Document