Literature Review
Laser beam machining (LBM) has proven its applications and advantages over almost all the range of engineering materials. It offers its competences from macro machining to micro and nano-machining of simple-to-complex shapes. The flipside of LBM is the ex
- PDF / 1,673,101 Bytes
- 66 Pages / 439.37 x 666.142 pts Page_size
- 73 Downloads / 203 Views
Laser beam machining (LBM) has proven its applications and advantages over almost all the range of engineering materials. It offers its competences from macro machining to micro and nano-machining of simple-to-complex shapes. The flipside of LBM is the existence of universal problems associated with its thermal ablation mechanism. In order to alleviate or reduce the inherent problems of LBM, a massive research has been done during the past decade and in turn build a relatively new route of laser-hybrid processes. The hybrid approaches in laser ablation have demonstrated much improved results in terms of material removal rate, surface integrity, geometrical tolerances, thermal damage, metallurgical alterations and many more.
1 Background Conventional machining (CM) is no doubt greatly applicable for wide variety of materials. However, shaping of hard to machine materials alongside the complex geometries impose some limitations. Difficult to machine materials such as titanium and nickel alloys, superalloys, ceramics and metal matrix composites are not easy to deal with CM processes. Similarly, complex machining characteristics (3-D milling, high aspect drilling, taper free holes, crack free edges etc.) and fragile jobs (ultrathin sheets, wafers etc.) call for some competitive process. In connection, modern components and products like spinning nozzles, turbine blades and fuel injectors require high standard of machining results. There are two common practices to accept such challenges. One is to employ non-conventional machining (NCM) process and the other is assisting the CM process with some non-conventional machining (NCM) technique. Laser beam machining (LBM) is much promising in this regard especially dealing with almost whole range of engineering materials [53]. Although the process is slow but it offers © Springer Nature Singapore Pte Ltd. 2017 S.M.H. Darwish et al. (eds.), Laser Beam Micro-milling of Micro-channels in Aerospace Alloys, Advanced Structured Materials 68, DOI 10.1007/978-981-10-3602-6_2
15
16
Literature Review
great advantages over the conventional machining processes like non-contact and non-wearing tool, independence of material hardness, good surface finish and precise cut quality. Laser beam cutting is superior to any cutting method conventional or non-conventional because of material versatility, no wear or change of tool, high material utilization, production flexibility, high accuracy and edge quality. Instead of direct material removal, however, the laser energy is also used for heating [54], melting [55] or assisting the other machining processes. In these scenarios the process is termed as laser assisting machining (LAM) [56]. It is more widely used to enrich the CM potentials especially for hard-to-machine materials. The literature is clustered with laser assisted conventional turning which majorly contribute to reduce the cutting forces, improve the tool life and process throughput. In the last decade, the trend is switching from traditional LBM to hybrid LBM by coupling some oth
Data Loading...
