A Study of the Cutting Temperatures of Turning Stainless Steels with Chamfered Main Cutting Edge Nose Radius Worn Tools

2010 ◽  
Vol 126-128 ◽  
pp. 760-766
Author(s):  
Chung Shin Chang
Keyword(s):  
Cutting Temperature ◽  
Cutting Edge ◽  
Heat Transfer Analysis ◽  
Nose Radius ◽  
Element Analysis ◽  
Heat Partition ◽  
Inverse Heat Transfer ◽  
Proposed Model ◽  
Partition Factor ◽  
Good Agreement

To study the cutting forces and the carbide tip's surface temperatures of stainless steel (SUS 304) with a chamfered main cutting edge nose radius worn tools. A new cutting temperature model incorporating tool worn factor and using the variations of shear and friction plane areas occurring in tool worn situations are presented in this paper. The heat partition factor between the tip and chip is solved by using the inverse heat transfer analysis, which utilizes temperature on the carbide tip’s surface measured by infrared as the input. The tip’s carbide surface temperature is determined by finite element analysis (FEA) and compared with temperatures obtained from experimental measurements; good agreement demonstrates the proposed model.

Prediction of the Cutting Temperatures of Turning Stainless Steels With Nose Radius Worn Tools

2010 ◽  
Author(s):  
Chung-Shin Chang
Keyword(s):  
Cutting Temperature ◽  
Heat Transfer Analysis ◽  
Temperature Model ◽  
Nose Radius ◽  
Element Analysis ◽  
Heat Partition ◽  
Inverse Heat Transfer ◽  
Proposed Model ◽  
Partition Factor ◽  
Good Agreement

To study the cutting forces and the carbide tip’s surface temperatures of stainless steel (SUS 304) with a chamfered main cutting edge nose radius worn tools. A new cutting temperature model incorporating tool worn factor and using the variations of shear and friction plane areas occurring in tool worn situations are presented in this paper. The heat partition factor between the tip and chip is solved by using g the inverse heat transfer analysis, which utilizes temperature on the carbide tip’s surface measured by infrared as the input. The tip’s carbide surface temperature is determined by finite element analysis (FEA) and compared with temperatures obtained from experimental measurements; good agreement demonstrates the proposed model.

A Study on Cutting Temperatures of Turning Stainless Steel with Chamfered Main Cutting Edge Nose Radius Tools

2009 ◽  
Author(s):  
Chung-Shin Chang
Keyword(s):  
Stainless Steel ◽  
Cutting Tools ◽  
Cutting Temperature ◽  
Cutting Edge ◽  
Heat Transfer Analysis ◽  
Nose Radius ◽  
Element Analysis ◽  
Inverse Heat Transfer ◽  
Frictional Forces ◽  
P Type

Temperatures of the carbide tip’s surface when turning stainless steel with a chamfered main cutting edge nose radius tool are investigated. The mounting of the carbide tip in the tool holder is ground to a nose radius as measured by a toolmaker microscope, and a new cutting temperature model developed from the variations in shear and friction plane areas occurring in tool nose situations are presented in this paper. The frictional forces and heat generated in the basic cutting tools are calculated using the measured cutting forces and the theoretical cutting analysis. The heat partition factor between the tip and chip is solved by the inverse heat transfer analysis, which utilizes the temperature on the P-type carbide tip’s surface measured by infrared as the input. The tip’s carbide surface temperature is determined by finite element analysis (FEA) and compared with temperatures obtained from experimental measurements. Good agreement demonstrates the accuracy of the proposed model.

A Study of Cutting Temperatures in Turning Carbon-Fiber-Reinforced-Plastic (CRFP) Composites with Nose Radius Tools

2015 ◽  
Vol 649 ◽  
pp. 38-45 ◽  
Author(s):  
Chung Shin Chang
Keyword(s):  
Carbon Fiber ◽  
Cutting Temperature ◽  
High Strength ◽  
Heat Transfer Analysis ◽  
Fiber Reinforced ◽  
Nose Radius ◽  
Element Analysis ◽  
Reinforced Plastics ◽  
Inverse Heat Transfer ◽  
Carbon Fiber Reinforced

Nine kinds of chamfered main cutting edge nose radius tools were used in turning of high-strength carbon-fiber-reinforced-plastics (CFRP) materials to study the cutting temperature of tip's surface. A new cutting temperature model using the variations of shear and friction plane areas occurring in tool nose situations are presented in this paper. The frictional forces and heat generated in the cutting process are calculated by using the measured cutting forces and the theoretical cutting analysis. The heat partition factor between the tip and chip is solved by using the inverse heat transfer analysis, which utilizes temperature on the K type carbide tip’s surface measured by infrared as the input. The tip’s carbide surface temperature is determined by finite element analysis (FEA) and compared with temperatures obtained from experimental measurements. Good agreement demonstrates the proposed model.

A Study of Cutting Temperatures in Turning Carbon-Fiber-Reinforced-Plastic (CRFP) Composites with Nose Radius Worn Tools

2018 ◽  
Vol 26 (1) ◽  
pp. 19-26 ◽  
Author(s):  
Chung-Shin Chang
Keyword(s):  
Carbon Fiber ◽  
Cutting Temperature ◽  
High Strength ◽  
Heat Transfer Analysis ◽  
Fiber Reinforced ◽  
Nose Radius ◽  
Element Analysis ◽  
Reinforced Plastics ◽  
Inverse Heat Transfer ◽  
Carbon Fiber Reinforced

Nine kinds of carbide nose radius worn tools were used in turning of high-strength carbon-fiber-reinforced-plastics (CFRP) materials to study the cutting temperature of tip's surface. A new cutting temperature model using the variations of shear and friction plane areas occurring in tool nose wear situations are presented in this paper. The frictional forces and heat generated in the cutting process are calculated by using the measured cutting forces and the theoretical cutting analysis. The heat partition factor between the tip and chip is solved by using the inverse heat transfer analysis, which utilizes temperature on the K type carbide tip's surface measured by infrared as the input. The tip's surface temperature is determined by finite element analysis (FEA) and compared with temperatures obtained from experimental measurements. Good agreement demonstrates the proposed model.

Metal to Metal Flanges Leakage Analysis

2009 ◽  
Author(s):  
L. Bertini ◽  
M. Beghini ◽  
C. Santus ◽  
G. Mariotti
Keyword(s):  
Stress Intensity ◽  
Research Collaboration ◽  
Original Model ◽  
Nonlinear Finite Element ◽  
Function Technique ◽  
Element Analysis ◽  
Large Size ◽  
Proposed Model ◽  
Good Agreement ◽  
Made In

The use of a gasket made in soft material is not recommended for large size centrifugal compressor case flange. The two case halves are assembled with bolted flanges and leakage is prevented by the metal–to–metal contact under pressure. The prediction of the leakage condition is an important engineering issue for this technology. In the paper an original model able to predict the leakage condition, based on a Fracture Mechanics approach, is presented. The flange surfaces interface is regarded as a crack which can be partially open. As the flanges can not transfer tensile traction, the extension of the open zone, i.e. the crack length, is obtained by the condition that the Stress Intensity Factor K is zero. An analytical model, based on the Weight Function technique, was applied to find the stress intensity K, and then to predict the leakage condition. The paper illustrates a validation of the proposed model by the comparison with a nonlinear Finite Element analysis and the results of a full scale experimental test series obtained by a research collaboration between industry and academia. The leakage pressure predicted by the model is in good agreement with the numerical prediction and the experimental results.

Modeling Cutting Temperatures for Turning Inserts With Various Tool Geometries and Materials

2002 ◽  
Vol 124 (3) ◽  
pp. 544-552 ◽  
Author(s):  
Aloysius U. Anagonye ◽  
David A. Stephenson
Keyword(s):  
Finite Element ◽  
Correction Factor ◽  
Factor Model ◽  
Cutting Temperature ◽  
Temperature Correction ◽  
Temperature Model ◽  
Nose Radius ◽  
Element Analysis ◽  
Included Angle ◽  
Tool Geometries

Temperatures are of interest in machining because cutting tools often fail by thermal softening or temperature-activated wear. Many models for cutting temperatures have been developed, but these models consider only simple tool geometries such as a rectangular slab with a sharp corner. They do not simultaneously account for tool nose radii and insert shape effects, even though it is known in practice that these features affect tool life and thus presumably tool temperature. This report describes a finite element study of tool temperatures in cutting that accounts for tool nose radius and included angle effects. A temperature correction factor model that can be used in the design and selection of inserts is developed to account for these effects. Parametric mesh generator is used to generate the finite element models of tool and inserts of varying geometries. The steady-state temperature response is calculated using NASTRAN solver. Several finite element analysis (FEA) runs are performed to quantify the effects of insert’s included angle, nose radius, and materials for the insert and the tool holder on the cutting temperature at the insert rake face. The FEA results are then utilized to develop a temperature correction factor model that accounts for these effects. The temperature correction factor model is integrated with an analytical temperature model for rectangular inserts to predict cutting temperatures for contour turning with inserts of various shapes and nose radii. Finally, experimental measurements of cutting temperature using tool-work thermocouple technique are performed and compared with the predictions of the new temperature model. The comparisons show good agreement.

Prediction of Chip Flow Direction, Cutting Forces and Surface Roughness in Finish Turning

1998 ◽  
Vol 120 (1) ◽  
pp. 1-12 ◽  
Author(s):  
J. A. Arsecularatne ◽  
R. F. Fowle ◽  
P. Mathew
Keyword(s):  
Surface Roughness ◽  
Cutting Forces ◽  
Flow Direction ◽  
Cutting Edge ◽  
Cutting Conditions ◽  
Nose Radius ◽  
Chip Flow ◽  
Edge Based ◽  
Tool Cutting ◽  
Good Agreement

A method is described for calculating the chip flow direction in terms of the tool cutting edge geometry and cutting conditions. By defining an equivalent cutting edge based on the chip flow direction it is shown how cutting forces can be predicted under finishing conditions when the work material’s flow stress and thermal properties are known. A comparison between predicted and experimental results obtained for a range of tool geometries and cutting conditions shows good agreement. Surface roughness Ra values measured in the tests are compared with the theoretical values determined from the nose radius and feed.

Prediction of Cutting Temperatures in Turning of Glass Fiber Reinforced Plastics (GFRP) Materials

2008 ◽  
Vol 24 (4) ◽  
pp. 357-368 ◽  
Author(s):  
C.-S. Chang ◽  
Y.-L. Lin ◽  
B.-C. Hwang
Keyword(s):  
Glass Fiber ◽  
Cutting Tools ◽  
Cutting Temperature ◽  
High Strength ◽  
Heat Transfer Analysis ◽  
Fiber Reinforced ◽  
Element Analysis ◽  
Reinforced Plastics ◽  
Glass Fiber Reinforced ◽  
Fiber Reinforced Plastics

AbstractThirty six kinds of chamfered and unchamfered main cutting edge carbide tips were used in turning of high-strength glass-fiber-reinforced plastics (GFRP) materials to study the cutting temperature of tip's surface. The frictional forces and heat generated on elementary cutting tools are calculated by using the measured cutting forces and the theoretical cutting analysis. The heat partition factors between the tip and chip are solved by using the inverse heat transfer analysis, which utilizes temperature on the K type carbide tip's surface measured by infrared as the input. The tip's surface temperature of the carbide is solved by finite element analysis (FEA) and compared with those obtained from experimental measurements. A good agreement demonstrates the accuracy of the proposed model.

scholarly journals Modeling and Optimizing the Effects of Insert Angles on Hard Turning Performance

2021 ◽  
Vol 2021 ◽  
pp. 1-18
Author(s):  
Pham Minh Duc ◽  
Mai Duc Dai ◽  
Le Hieu Giang
Keyword(s):  
Mathematical Model ◽  
Hard Turning ◽  
Tangential Force ◽  
Cutting Temperature ◽  
Rake Angle ◽  
Cutting Edge ◽  
Turning Process ◽  
Nose Radius ◽  
Positive Effects ◽  
Feed Force

To analyze hard turning performance characteristics, a new mathematical model was developed for the hard turning process, and cutting force (CF), another important response for cutting machining, was also studied in the present work. The analysis of the mathematical model and experimental results revealed that thrust force (Fy) was the largest, followed by tangential force (Fz) and feed force (Fx). The resultant CF was most influenced by inclination angle (IA) with 25.02%, followed by rake angle (RA) (14.26%) and cutting edge angle (CEA) (10.04%). Increasing CEA changed the position of cutting on the tool-nose radius and increased local negative RA and correspondingly local clearance angle (CA). Meanwhile, increasing negative RA and IA resulted in larger local negative RA and CA. Moreover, local RA and local CA were the main geometric factors affecting surface roughness (SR), tool wear (TW), and CF. Increasing local negative RA resulted in higher SR and CF. In contrast, increasing local CA resulted in lower SR, TW, and CF. Under specific conditions, the positive effects of the local CA overcame the negative effects of the local negative RA, leading to a simultaneous decrease in SR and TW. The proposed novel mathematical model can be further applied to calculate local CF, cutting temperature, and TW for each cutting-edge element, to analyze and optimize the hard turning process.

Prediction of Cutting Temperatures in Milling Stainless Steels Using Sharp Worn Tools

2014 ◽  
Vol 528 ◽  
pp. 191-198
Author(s):  
Chung Shin Chang ◽  
C.H. Chen
Keyword(s):  
Cutting Tools ◽  
Cutting Temperature ◽  
Temperature Model ◽  
Analysis Method ◽  
Element Analysis ◽  
Wear Factor ◽  
Friction Forces ◽  
Finite Element Analysis Method ◽  
Heat Generate ◽  
Good Agreement

The main purpose of this paper is to predict the tip's surface temperature of milling stainless steel using chamfered main cutting sharp worn tools. The cutting temperature model incorporating tool wear factor and using the variations of shear and friction plane areas occurring in tool worn situations are presented in this paper. The heat generate on elementary cutting tools are calculated by using the frictional cutting forces. Comparing the experimental forces measured by the dynamometer, that is good agreement. The carbide tip’s temperature calculates by loading the friction forces and tip’s parameters and the temperature distribution are solved by finite element analysis method.

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