WEAR AT THE END CUTTING EDGE OF CARBIDE TOOLS IN FINISH AND ROUGH TURNING

Author(s):  
A.J. PEKELHARING ◽  
H.J. HOVINGA
Keyword(s):  
2014 ◽  
Vol 575 ◽  
pp. 431-436 ◽  
Author(s):  
M.S. Alajmi ◽  
S.E. Oraby

The impact of the cutting parameters; speed, feed, and depth of cut on the wear and the life of the cutting edge has long been a matter of debate among researchers. The cutting speed has long been agreed to have a prime influence in such a way that increasing speed leads to higher wear rate. Depth of cut has been concluded by majority of studies to have insignificant or negligible impact on edge wear and deformation. Despite its long established influence on the roughness of the machined surface, the effect of cutting feed on edge wear and deformation still requires more explanation. Cutting feed is a crucial parameter governing the product surface finish and dimensional accuracy and, therefore, its attitude during machining should be fully understood. This study presents experimental and modeling approach to detect the feed-wear functional interrelation considering various domains of the cutting speed. Results showed that the impact of the cutting feed is firmly associated with the level of cutting speed employed. Speed-feed interaction proved to be responsible for the performance of the cutting edge during machining.


2017 ◽  
Vol 261 ◽  
pp. 237-242
Author(s):  
Daniel Kottfer ◽  
Ildikó Maňková ◽  
Marek Vrabel' ◽  
Marta Kianicová ◽  
František Rehák ◽  
...  

Authors of the paper present different types of tool wear after machining of weld overlay with AlTiN cutting insert. Welded layer was created on roller made from S355J0 steel by Open Arc (OA) method also referred as Metal One Gas (MOG). Various forms of tool wear were documented by optical microscope. Microchipping of cutting edge, built up edge (BUE) and flank wear were identified on examined round insert in rough turning of hard cladding.


2019 ◽  
Vol 39 (11) ◽  
pp. 955-958
Author(s):  
A. A. Malikov ◽  
S. Ya. Khludov ◽  
M. O. Boriskina ◽  
V. D. Artamonov

Author(s):  
J. Temple Black

The output of the ultramicrotomy process with its high strain levels is dependent upon the input, ie., the nature of the material being machined. Apart from the geometrical constraints offered by the rake and clearance faces of the tool, each material is free to deform in whatever manner necessary to satisfy its material structure and interatomic constraints. Noncrystalline materials appear to survive the process undamaged when observed in the TEM. As has been demonstrated however microtomed plastics do in fact suffer damage to the top and bottom surfaces of the section regardless of the sharpness of the cutting edge or the tool material. The energy required to seperate the section from the block is not easily propogated through the section because the material is amorphous in nature and has no preferred crystalline planes upon which defects can move large distances to relieve the applied stress. Thus, the cutting stresses are supported elastically in the internal or bulk and plastically in the surfaces. The elastic strain can be recovered while the plastic strain is not reversible and will remain in the section after cutting is complete.


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