pulse laser beam
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RSC Advances ◽  
2018 ◽  
Vol 8 (73) ◽  
pp. 41915-41919
Author(s):  
Pingwei Zhou ◽  
Yu Zhu ◽  
Shengfu Li ◽  
Li-guo Zhu

A method that can reutilize the energy of a nanosecond pulse laser beam in LIBS was studied. When the pulse energy is not sufficient to generate the plasma, the overlapped point in this method can reach the threshold.



2017 ◽  
Vol 34 (8) ◽  
pp. 1351 ◽  
Author(s):  
Pierre Favier ◽  
Kevin Dupraz ◽  
Kevin Cassou ◽  
Xing Liu ◽  
Aurélien Martens ◽  
...  


2016 ◽  
Vol 719 ◽  
pp. 109-113
Author(s):  
Kenji Yamaguchi ◽  
Itaru Matsumoto ◽  
Tsuyoshi Fujita ◽  
Yasuo Kondo ◽  
Satoshi Sakamoto ◽  
...  

It is well-known that a series of cracks sometimes gets initiated perpendicular to the cutting edges on the rake faces of brittle cutting tools made of materials such as cemented carbide, ceramics, and cermet under high-speed intermittent cutting. The tools used in intermittent cutting processes are exposed to elevated temperatures during cutting and then cool quickly during the noncutting time. Previous studies have suggested that such repeated thermal shocks generate thermal stress in the tool and that the thermal cracks are then propagated by thermal fatigue. Recently, high-speed machining techniques have attracted the attention of researchers. To apply new cutting tool materials to this machining process, it is important to evaluate their thermal shock fatigue resistances. During high-speed intermittent cutting, the frequency of thermal shocks becomes high and the action area of the thermal shocks is limited to the rake face of the tool. Therefore, conventional thermal shock resistance evaluation methods are unsuitable for this case. Consequently, the authors have developed a new experimental evaluation method using a CO2 laser beam. In this study, we irradiated cemented carbide and TiN cermet cutting tools with the CO2 pulse laser beam and gauged the effectiveness of the proposed thermal shock fatigue resistance evaluation method. The results show a correlation between the thermal shock due to the CO2 pulse laser beam and those due to the intermittent cutting experiments.



2015 ◽  
Vol 806 ◽  
pp. 83-87 ◽  
Author(s):  
Oksana Ganzulenko ◽  
Ani Petkova

The article is devoted to some aspects of laser marking technology for machine parts. We consider the local impact zone effect of the pulse laser beam on the surface of metal materials. The results describing the influence of process parameters on the quality of the being marked images by pulsed laser are submitted. The examples of using barcode marking on several materials for machine parts in selected technological modes of installation are given.



2015 ◽  
Vol 39 (2) ◽  
pp. 187-196 ◽  
Author(s):  
S. N. Khonina ◽  
S. A. Degtyarev ◽  
A. P. Porfirev ◽  
O. Yu. Moiseev ◽  
S. D. Poletaev ◽  
...  


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