Main features of laser cutting process, Mechanical Engineering

Assignment Help:

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 that
it 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.


Related Discussions:- Main features of laser cutting process

Mounting systems for the welding head, Mounting Systems For The  Welding H...

Mounting Systems For The  Welding Head Submerged arc welding head may be mounted by one of the following three methods. a. Fixed type b. Carriage mounted type c. Boom mounted ty

V pulley design, #wHAT WILL BE THE PULLEY CRITERIA TO DECIDE THE RPM

#wHAT WILL BE THE PULLEY CRITERIA TO DECIDE THE RPM

Explain classification of welding processes, Classification Of Welding Proc...

Classification Of Welding Processes The classificated depending upon the nature of heat source and its movement resulting in spot, seam or zonal welds; or on the extent of heat

Need Assignment, Ac circuit having rl rc rlc. Series

Ac circuit having rl rc rlc. Series

Classification of system - thermodynamics, Classification of system - Therm...

Classification of system - Thermodynamics: (1) Kitchen refrigerator, (2) Ceiling fan (3) Thermometer in mouth (4) Air compressor (5) Pressure Cooker (6) Carburetor (7) R

Determine product data exchange specifications, Product Data Exchange Speci...

Product Data Exchange Specifications (PDES) By 1984, many of these international efforts had produced enough results to be compared, and an international community was preparin

Can you explain bentonite binders, Q. Can you explain Bentonite binders? ...

Q. Can you explain Bentonite binders? Its general composition is MgO.Al 2 O 3 .Sio 2 .H 2 O. it is formed by weathering of volcanic or igneous rocks. It is a creamy white powde

Centre of gravity and moment of inertia, Centre of Gravity and Moment of In...

Centre of Gravity and Moment of Inertia: -  For a uniform plate of mass M, the overall mass may be divided into individual masses M i for which centre of gravity is known as

Process planning, we have to design crane we did already with calculation r...

we have to design crane we did already with calculation remaining is process planning

Determine the concurrent forces, Determine the concurrent forces: Four...

Determine the concurrent forces: Four coplanar concurrent forces act at point and keep it at rest. These are mention in Figure. Determine the forces P and Q. Solution

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

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!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd