A Modified Model of the Primary Shear Zone for Orthogonal Machining

2012 ◽  
Vol 229-231 ◽  
pp. 503-506 ◽  
Author(s):  
Fang Juan Zhou ◽  
Xue Lin Wang ◽  
Yu Jin Hu
Keyword(s):  
Stainless Steel ◽  
Shear Zone ◽  
Cutting Forces ◽  
Experimental Results ◽  
Correction Coefficient ◽  
Stainless Steel 316L ◽  
Modified Model ◽  
Orthogonal Machining ◽  
Proposed Model ◽  
Coordinate Mapping

A new modified model based on the non-parallel primary shear zone is presented in this paper. Experiments showed that the primary shear zone in cutting process wasn’t an absolutely parallel-sided zone. In fact, there are small inclined angles in the primary shear zone. Therefore, in this paper, a correction coefficient is proposed to predict cutting forces exactly. The coordinate mapping approach is adopted to obtain the correction coefficient and the software MATLAB is utilized to predict cutting forces. The material of stainless steel 316L is used to validate the modified model. By comparison between predicted analysis and experimental results, the proposed model shows good agreements with experiments.

scholarly journals Numerical and experimental investigation of Johnson–Cook material models for aluminum (Al 6061-T6) alloy using orthogonal machining approach

2018 ◽  
Vol 10 (9) ◽  
pp. 168781401879779 ◽  
Author(s):  
Sohail Akram ◽  
Syed Husain Imran Jaffery ◽  
Mushtaq Khan ◽  
Muhammad Fahad ◽  
Aamir Mubashar ◽  
...  
Keyword(s):  
Coefficient Of Friction ◽  
Cutting Forces ◽  
High Speed ◽  
Material Model ◽  
Material Behavior ◽  
Experimental Results ◽  
Model Parameters ◽  
Al 6061 ◽  
Orthogonal Machining ◽  
Cutting Speeds

This research focuses on the study of the effects of processing conditions on the Johnson–Cook material model parameters for orthogonal machining of aluminum (Al 6061-T6) alloy. Two sets of parameters of Johnson–Cook material model describing material behavior of Al 6061-T6 were investigated by comparing cutting forces and chip morphology. A two-dimensional finite element model was developed and validated with the experimental results published literature. Cutting tests were conducted at low-, medium-, and high-speed cutting speeds. Chip formation and cutting forces were compared with the numerical model. A novel technique of cutting force measurement using power meter was also validated. It was found that the cutting forces decrease at higher cutting speeds as compared to the low and medium cutting speeds. The poor prediction of cutting forces by Johnson–Cook model at higher cutting speeds and feed rates showed the existence of a material behavior that does not exist at lower or medium cutting speeds. Two factors were considered responsible for the change in cutting forces at higher cutting speeds: change in coefficient of friction and thermal softening. The results obtained through numerical investigations after incorporated changes in coefficient of friction showed a good agreement with the experimental results.

Mechanics of Orthogonal Machining: Predicting Chip Geometry and Cutting Forces from Work-Material Properties and Cutting Conditions

1969 ◽  
Vol 184 (1) ◽  
pp. 927-942 ◽  
Author(s):  
R. G. Fenton ◽  
P. L. B. Oxley
Keyword(s):  
Excellent Agreement ◽  
Material Properties ◽  
Cutting Forces ◽  
Contact Length ◽  
Experimental Results ◽  
Cutting Conditions ◽  
Orthogonal Machining ◽  
Work Material ◽  
Wide Range ◽  
Chip Geometry

A recently developed theory of orthogonal machining is used to calculate chip geometry (including tool-chip contact length) and cutting forces for SAE 1112 steel over a wide range of cutting conditions. A comparison with experimental results shows excellent agreement for most of the cutting conditions considered.

Drilling Thrust and Torque Prediction of Viscoplastic Materials

2006 ◽  
Author(s):  
Hossein Vaghefpour ◽  
Ali Nayebi
Keyword(s):  
Shear Zone ◽  
Cutting Forces ◽  
Material Flow ◽  
Thrust Force ◽  
Orthogonal Cutting ◽  
Thermomechanical Properties ◽  
Twist Drill ◽  
Proposed Model ◽  
Thrust And Torque ◽  
Good Agreement

A model for drilling of viscoplastic materials is presented. An analytical model is developed for predicting thrust force and torque in the drilling with a twist drill. The thermomechanical properties are accounted for describing the material flow in the primary shear zone and at the element-chip interface. A temperature friction law is introduced. The approach is based on the representing the cutting forces along the cutting lips as a series of oblique elements. Similarly, cutting in the chisel region is treated as orthogonal cutting with different speeds depending on the radial location. The section forces obtained by the model are combined to determine the overall thrust force and drilling torque. The results of the proposed model are compared with experimental results and a good agreement is obtained.

Effect of Variable Pitch on Cutting Temperature, Cutting Forces and Surface Roughness Using Nitico30 Cutting Tool when End Milling of Stainless Steel 316L

2017 ◽  
Vol 909 ◽  
pp. 50-55
Author(s):  
Afiff Latif ◽  
Mohd Rasidi Ibrahim ◽  
Mohammad Sukri Mustapa ◽  
Noor Hakim Rafai ◽  
Charles Prakash
Keyword(s):  
Surface Roughness ◽  
Stainless Steel ◽  
Feed Rate ◽  
Cutting Forces ◽  
Cutting Tool ◽  
End Milling ◽  
Cutting Tools ◽  
Cutting Temperature ◽  
Stainless Steel 316L ◽  
Variable Pitch

In this paper, a series of milling tests were carried out in order to identify the effects of variable pitch on cutting temperature, cutting force and surface roughness while end milling the stainless steel 316L using Nitico30 and conventional cutting tools. Slot-milling operations were conducted. The value of feed rate were choose between the range recommended by the manufactured for the both conventional and Nitico30 cutting tool. The effect of variable pitch on cutting temperature, cutting forces and surface roughness were discussed. Results showed that the cutting temperature increase with the increase of feed rate for both cutting tool. Further increasing the speed of feed rate, the cutting forces also gradually increase for both cutting tool. However, the comparison between both cutting tools, it was found that the cutting temperature, cutting force and surface roughness improve about 47.8%, 37.5% and 17.6% respectively for Nitico30 cutting tool.

Connected-Tube MPP Model for Unsupervised 3D Fiber Detection

2020 ◽  
Vol 2020 (14) ◽  
pp. 305-1-305-6
Author(s):  
Tianyu Li ◽  
Camilo G. Aguilar ◽  
Ronald F. Agyei ◽  
Imad A. Hanhan ◽  
Michael D. Sangid ◽  
...  
Keyword(s):  
Composite Material ◽  
Point Process ◽  
Marked Point ◽  
Experimental Results ◽  
Marked Point Process ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite ◽  
Proposed Model ◽  
Cylinder Model ◽  
Reinforced Composite Material

In this paper, we extend our previous 2D connected-tube marked point process (MPP) model to a 3D connected-tube MPP model for fiber detection. In the 3D case, a tube is represented by a cylinder model with two spherical areas at its ends. The spherical area is used to define connection priors that encourage connection of tubes that belong to the same fiber. Since each long fiber can be fitted by a series of connected short tubes, the proposed model is capable of detecting curved long tubes. We present experimental results on fiber-reinforced composite material images to show the performance of our method.

Effect of Different Coating Techniques with Aluminum on the Corrosion Behavior of Stainless Steel 316L in Seawater

2012 ◽  
Vol 15 (3) ◽  
pp. 112-122
Author(s):  
Ali H. Ataiwi ◽  
◽  
Abdul Khaliq F. Hamood ◽  
Rana A. Majed ◽  
◽  
...  
Keyword(s):  
Stainless Steel ◽  
Corrosion Behavior ◽  
Stainless Steel 316L
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