Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Main Features of Laser Cutting Process
1) Laser cut kerf is very narrow resulting in material saving.2) Has very narrow heat affected zone (HAZ) and therefore gives low thermal distortion. Gives machine smooth cut surface reducing the need for subsequent trimming.3) The cut has square edges.4) There is no tool wear (contact free energy transfer).5) The work piece does not need holding against tool drag. Work holding demands are reduced to merely a locating role.6) Possible to cut through friable, brittle, soft or hard material or composites with ease.7) It is a non contact method with no cutting forces and is ideal for cutting flexible material such as clot h, rubber, corrugat ed cardboard, etc.8) Non directional, cuts equally well in all directions and can start cutting anywhere.9) Blind cuts can be made.10) The cutting speed is fast compared to other methods as the light beam is inertia less.11) Multistation operations from one laser are possible.12) It is easily automated by numerical control.There are five different ways, in which a laser can be used to cut different materials:a) Vapourisation: the beam energy heats the substrate to above its boiling point and material leavesas vapour and eject - this requires 10 times the energy of (b)b) Melting and Blowing: the beam energy melts the substrate and a jet of inert gas blows the melt out of the cut region - this requires around twice the energy of (c)c) Burning in reactive gas - the beam energy heats material to the kindling temperature, which then burns in a reactive gas jet; as in (b) the jet also clear the dross away - requires around 10 times energy of (d) for some materials.d) Thermal stress cracking or controlled fracturing - the beam energy sets up a thermal field in a brittle material ego glass such thatit can guide a crack in any direction.e) Scribing - variant on (a) whereby blind cut is used as a stress raiser allowing mechanical snapping along the scribed lines.
When was PDDI developed The PDDI interface was developed in connection with the ICAM project which was funded by the Air Force in order to improve the manufacturing methods in
Types of Gas Welding Process Gas welding includes all those welding processes in which gas flame is used as a heat source for melting metals. It is further divided into three m
diference between thermal and thermodynamic equallibrim
Q. What do you know about Direct welds? It is a welding method in which one or more electrodes oppose each other, contacting both sides of the work and with the current passing
PRINCIPLE OF SUBMERGED ARC WELDING In submerged arc welding, the arc zone is submerged beneath the molten flux and hence there is no visible signature of the arc. Welding current
Determine magnitude of the couple: A square block having each side 1.5 m is acted upon by system of forces along its sides as shown in the adjoining figure. If system reduces
wire-frame entities-representing ellipse and parabolas
Determine the frictional resistance: (i) A train having weight 400 kN is running up an inclined path of 1 in 100 at a steady speed of 54 km/hour. If the frictional resistance
Plate clutch pressure height : Check plate clutch pressure leg height by placing the plate clutch pressure on the surface plate. Plate clutch pressure should not tilt on the surfa
Determine the moment of resistance of the beam: A circular beam of diameter 100 mm is subjected to bending. The maximum bending stress is restricted to 50 N/mm 2 . Determine t
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd