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Sheet and plate metalwork
Published in Roger Timings, Fabrication and Welding Engineering, 2008
A common requirement for light sheet-metal fabrications is the notched corner, as used in the making of simple folded trays and boxes. Notching is an essential operation where thin gauge fabrications include wired edges, self-secured joints, lap joints and welded corner seams. The term ‘notching’ is used to describe, in simple form, the removal of metal from the edges and/or corners of sheet-metal blanks or patterns prior to carrying out any forming operations in order to facilitate such operations.
A new geometry for improving the strength of single lap joints using adherend notching technique
Published in The Journal of Adhesion, 2021
M.J. Beigrezaee, M. R. Ayatollahi, B. Bahrami, L.F.M. da Silva
As a final point, it is worth mentioning that any plastic deformation was not seen in the adherends after the tests by using the outer notch technique while some minor plastic deformations were reported by researchers when they used other methods of the adherend notching technique.[23] This can be due to the fact that the outer surfaces of the adherends tolerate compressive stresses and hence, introducing the notch into these surfaces will not reduce the load-bearing capacity of the adherends which can be enumerated as another advantage of the proposed method in this paper. Although the effectiveness of the adherend notching technique under static loading condition was investigated, further investigation are still needed for evaluating this approach under other loading conditions such as impact or fatigue loadings. As when the outer surface notching method is employed, the notch tip is under compressive loadings, it seems that this method can also improve the joint’s strength even under fatigue and impact loadings.
Investigations on homothetic and hybrid micro-textured tools during turning Inconel-718
Published in Materials and Manufacturing Processes, 2023
Avadhoot Rajurkar, Satish Chinchanikar
Severe flank and notching wear are the dominant modes of failure of carbide inserts. At higher cutting speeds, notching accelerates on carbide tools, causing untimely fracture of the cutting edge. It is attributed to extreme mechanical and thermal pressure on the cutting edge. This ultimately constrains levels of operating cutting speeds and feeds. This section discusses the comparative evaluation of the machining performance of homothetic and hybrid micro-textured inserts.