Obtaining Slots and Channels by using a 1070nm Wavelength Laser

AbstractSlots and channels are sometimes necessary in machine building; the surfaces of the slots and channels could be obtained by means of a laser beam machining equipment. Essentially, the material removal from the workpiece needs the development of thermal phenomena of melting and vaporizing and of dynamic phenomena, respectively, by which the melted and vaporized material is moved from the machining zone. The paper includes the results of the researches concerning the possibilities to use 1070nm wavelength laser equipment whose output power is of 300W, in order to obtain slots and channels in metallic test pieces. The sizes of the parameters able to characterize the machined surface are influenced by the machining conditions. The theoretical analysis of the machining process highlighted the necessity of sending a compressed air jet along the laser beam axis and of an adequate selection of the machining parameters. Experimental researches were developed by changing the speed of the relative motion between the laser spot and the test piece. Empirical relations were established by mathematical processing of the experimental results. The empirical relations highlight the influence exerted by speed between the test piece and the laser beam on the depth of the channels thus generated

Some Considerations Concerning the Monitoring of the Non-Traditional Machining Processes

In the last decades, one of the trends emphasized in the field of manufacturing processes concerns the monitoring of the machining parameters. The specialty literature emphasizes certain solutions for monitoring of parameters specific to the conventional machining methods. The relative variety of the non-traditional machining methods makes more difficult the identifying of common solutions for monitoring of the machining parameters of these machining methods. The paper presents some authors considerations concerning the evolution of the possibilities for monitoring of some techniques belonging to the so-called non-traditional machining methods