Advances in Theoretical Investigation of Work Hardening for Metal Cutting

2012 ◽  
Vol 217-219 ◽  
pp. 2060-2064
Author(s):  
Su Yu Wang ◽  
Wen Jie Yang ◽  
Lin Lin Ma
Keyword(s):  
Surface Quality ◽  
Influencing Factors ◽  
Theoretical Investigation ◽  
Work Hardening ◽  
Metal Cutting ◽  
Service Performance ◽  
Cutting Process ◽  
Forming Mechanism ◽  
Important Significance

Work hardening reserches in metal cutting has an important significance in improving surface quality of the workpiece and the service performance of parts. The paper introduces current researches of the work hardening in metal cutting process, analyses the forming mechanism and influencing factors of the work hardening and discusses the effects of the work hardening on workpiece service performance. At last, the new trends of work hardening researches in metal cutting process are conclusively predicted.

Ultraschallüberlagertes Trennschleifen von Faserverbundwerkstoffen*/Ultrasound abrasive cutting of fiber composites - Survey on the potential and mode of action

2016 ◽  
Vol 106 (01-02) ◽  
pp. 39-43
Author(s):  
Y. Babenko ◽  
T. Mayer ◽  
A. Gebhardt
Keyword(s):  
Surface Quality ◽  
Process Parameters ◽  
Mode Of Action ◽  
Fiber Composites ◽  
Cutting Process ◽  
Force Analysis ◽  
Abrasive Cutting

Dieser Fachartikel befasst sich mit der Untersuchung des Potentials der Ultraschallüberlagerung beim Trennschleifen moderner Faserverbundwerkstoffe. Es wurde eine Zerspankraftanalyse des Trennschleifprozesses am CFK-Werkstück mit variierenden Prozessparametern durchgeführt. Zudem wurden die Oberflächenqualitäten der Schnittkanten betrachtet.   The presented study describes the investigation of the potential of ultrasound abrasive cutting of modern fiber composites. A force analysis of the abrasive cutting process of CFRP was conducted, while the process parameters were varied. In addition, the surface quality of the machined workpieces was observed.

Study on Work Hardening Performance of Pure Shearing Fine-Blanking with Negative Clearance for ASTM-Gr.D and ASTM-1022 Steel

2010 ◽  
Vol 97-101 ◽  
pp. 145-148
Author(s):  
J.H. Li ◽  
W.F. Fan ◽  
Zhong Mei Zhang
Keyword(s):  
Work Hardening ◽  
Work Piece ◽  
Micro Hardness ◽  
Fine Blanking ◽  
Negative Clearance ◽  
Distribution Of Stress ◽  
Improve Fatigue Strength ◽  
Important Significance ◽  
Improve Fatigue

In the process of blanking, the work hardening capability of material possesses very important significance. It not only affects the internal stress value of distorting material, the distribution of stress and the value of blanking force, but also blanking deforming limit and quality of blanked work piece. This paper carries through pure shearing fine-blanking processing experiment with negative clearance for the ASTM-Gr.D and ASTM-1022 steel as well as the micro hardness of the sheared surface for the blanked work pieces in breadthways and lengthways direction measured by Vickers-micro hardness instrument (MH-6). Mechanism of work hardening for fine-blanking with negative clearance is discussed. Meanwhile, the work hardening capability of blanked work piece is analyzed. The work hardening degree of the materials possessing different hardening index is compared. It could be concluded that the work hardening degree of the blanking work pieces was strengthened evidently by the fine-blanking with negative clearance. The hardening layer of blanking fracture could enhance structure intensity and wear resistance of blanking work piece evidently. Therefore, it could improve fatigue strength and the working life of work piece greatly.

scholarly journals Pengaruh Parameter Pemesinan terhadap Kualitas Hasil Potong Mesin Bubut Maximat V13 pada Benda Kerja Poros PVC

2019 ◽  
Vol 2 (02) ◽  
pp. 19-24
Author(s):  
Kasijanto Kasijanto ◽  
Sadar Wahjudi ◽  
Listiyono Listiyono ◽  
Muhammad Fakhruddin
Keyword(s):  
Metal Cutting ◽  
Cutting Process ◽  
Machining Process ◽  
Work Piece ◽  
Machining Processes ◽  
Cutting Surface ◽  
Spindle Rotation ◽  
Feeding Speed ◽  
Tool Types

Metal cutting process (cutting process) is to cut metal to get the shape and size and quality of the planned cutting surface. The metal cutting process is carried out with special tools, according to the type of cutting process. So the tools for one process cannot be used in another process, even for similar processes, the tools cannot be exchanged if the cutting plans are not the same. Lathe process is a machining process to produce cylindrical machine parts which are carried out using a Lathe. Its basic form can be defined as the machining process of the outer surface of cylindrical or flat lathe objects. Polyvinyl Chloride, commonly abbreviated as PVC, is the third-order thermoplastic polymer in terms of total usage in the world, after Polyethylene (PE) and Polypropylene (PP). Worldwide, more than 50% of PVC produced is used in construction. PVC is produced by polymerizing vinyl chloride monomers (CH2 = CHCl). Because 57% of its mass is chlorine, PVC is the polymer that uses the lowest petroleum feedstock among other polymers. This research follows up the selection of configuration of the lathe machining process using plastic work pieces. In this study, Maximat V13 lathe and PVC type plastic were used. The variation of machining processes are spindle rotation (320, 540, and 900 rpm), feeding speed (0.07, 0.14, and 0.28), the use of tool types (carbide and HSS) and cooling (without cooling, coolant, and oil). So, with this research, it is expected that the optimal parameters in determining the configuration of the lathe machining process on a PVC work piece to produce a good turning surface can be achieved  

scholarly journals SURFACE QUALITY OF A WORK MATERIAL'S INFLUENCE ON THE VIBRATIONS OF THE CUTTING PROCESS

2002 ◽  
Vol 252 (4) ◽  
pp. 729-737 ◽  
Author(s):  
J. LIPSKI ◽  
G. LITAK ◽  
R. RUSINEK ◽  
K. SZABELSKI ◽  
A. TETER ◽  
...  
Keyword(s):  
Surface Quality ◽  
Cutting Process

Analysis of Surface Morphology in Work Hardening of High-Speed Milling Based on Dislocation Theory

2013 ◽  
Vol 373-375 ◽  
pp. 2015-2018
Author(s):  
Wen Jie Yang ◽  
Su Yu Wang ◽  
Yuan Chao Du ◽  
Lin Lin Ma
Keyword(s):  
Surface Quality ◽  
Work Hardening ◽  
High Speed ◽  
Lattice Distortion ◽  
Dislocation Theory ◽  
Machined Surface ◽  
High Speed Milling ◽  
Forming Mechanism ◽  
Machined Surface Quality ◽  
Micro Morphology

Work hardening is an important index for the evaluation of the machined surface quality in high-speed milling. The morphology of work hardening can be visually observed by the metallographic pictures of high-speed milling gained from the scanning electron microscope which includes the lattice distortion and cracks etc. Forming mechanism of lattice distortion and micro crack of micro morphology under the workpiece surface is analyzed according to the dislocation theory; meanwhile, the effects on surface quality of the microstructure of the work hardening layer are discussed, which have important guiding significances on improving the surface quality and prolonging the service life of the parts.

Dimensional analyses and surface quality of the laser cutting process for engineering plastics

2008 ◽  
Vol 41 (3-4) ◽  
pp. 259-267 ◽  
Author(s):  
Mustafa Kurt ◽  
Yusuf Kaynak ◽  
Eyup Bagci ◽  
Halil Demirer ◽  
Mahir Kurt
Keyword(s):  
Surface Quality ◽  
Laser Cutting ◽  
Cutting Process ◽  
Engineering Plastics

Research about Surface Quality of Polytetrafluoroethylene (Teflon) after Inner Turning

2015 ◽  
Vol 809-810 ◽  
pp. 213-219
Author(s):  
Cristina Ileana Pascu ◽  
Iulian Popescu ◽  
Alexandru Vintilescu
Keyword(s):  
Surface Quality ◽  
Cutting Process ◽  
Uniform Structure ◽  
Internal Diameter ◽  
Outer Diameter ◽  
Roughness Parameters ◽  
High Originality

For this study with high originality, a teflon bushing with outer diameter of 58 mm and 32 mm internal diameter has been turned. After inner turning with various cutting feeds, the part has been cut in half to measure roughness. The roughness parameters Ra, Rz and Rq have beeen measured with an electronic roughness tester Mitutoyo, Japan, SJ-201 P. The micro-asperity images for each of the 6 samples performed are presented in the paper. Diagrams with the variations of roughness parameters are also given in this study. The trend is the increasing of roughness values with feed increasing, but some abnormalities also appear in samples 3 and 4 for Ra and Rz. At sample 5 for Rz parameter and sample 6 for Rq parameter a decreasing of values occurs, although geometrically there should be with ascending tendencies. It follows that in teflon turning the cutting process is not uniform, although there are no marks on the blade. However, because this material is not metallic, it does not have a uniform structure, which influences the resulted roughness. This is the cause of the anomalies established by these experiments.

Effects of Splicing Chamber Parameters and Splicing Air Pressure on Splicing Performance

2010 ◽  
Vol 33 ◽  
pp. 231-235
Author(s):  
De Gong Chang ◽  
Cong Feng An ◽  
Z. Yang ◽  
L.P. Liu
Keyword(s):  
Influencing Factors ◽  
Air Pressure ◽  
Structure Parameters ◽  
Design Quality ◽  
Optimal Angle ◽  
Air Inlet ◽  
Theoretical Support ◽  
Important Significance

In this paper, the splicing chamber flow and influencing factors of splice as well as the structure parameters of splicing chamber and flow were analyzed with JMP/Fluent soft. The optimal angle between the air inlet and untwist cavity of the splicing chamber was obtained. Theoretical support is provided for the design of splicing chamber, and it has important significance to improve the design quality of the splicing chamber.

scholarly journals An Investigation of the Work Hardening Behavior in Interrupted Cutting Inconel 718 under Cryogenic Conditions

Materials ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2202
Author(s):  
Xing Dai ◽  
Kejia Zhuang ◽  
Donglin Pu ◽  
Weiwei Zhang ◽  
Han Ding
Keyword(s):  
Work Hardening ◽  
Inconel 718 ◽  
Metal Cutting ◽  
Surface Deformation ◽  
Cutting Temperature ◽  
Service Performance ◽  
Machined Surface ◽  
Interrupted Cutting ◽  
Cutting Processes ◽  
The Given

The severe work hardening phenomenon generated in the machining of Inconel 718 is harmful to continue cutting processes, while being good for the component’s service performance. This paper investigates the performance of cryogenic assisted machining used in the cutting processes, which can reduce the waste of fluids. The influence of dry and cryogenic machining conditions with different cutting speeds on the work hardening layer is investigated based on the interrupted cutting of Inconel 718. Cutting temperature distribution obtained from simulations under different conditions is used to discuss the potential mechanism of work hardening. Then, the depth of work hardening and degree of work hardening (DWH) are investigated to analyze the surface deformation behavior, which strengthens the machined surface during metal cutting processes. From the cutting experiments, the depth of the work hardening layer can reach more than 60 μm under the given cutting conditions. In addition, a deeper zone can be obtained by the cooling of liquid nitrogen, which may potentially enhance the wear performance of the component. The results obtained from this work can be utilized to effectively control the work hardening layer beneath the surface, which can be applied to improve the service performance.

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