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

Formation - permanent way, Formation (Embankment): The formation is t...

Formation (Embankment): The formation is the earthen embankment on which the other components of the track rest. For supporting the heavy loads, the earth should be of good q

Evaluate power transmitted by shaft, Evaluate power transmitted by shaft: ...

Evaluate power transmitted by shaft: How do you evaluate power transmitted by shaft (P)? Sol.: Consider force 'F' Newton's acting tangentially on shaft of radius ' R '.

Bearing materials, Bearing Materials Generally it can be said as a good...

Bearing Materials Generally it can be said as a good bearing material must posse following characteristics as: It must be strong enough to sustain bearing load. It

Metallurgy, what is mean by precipitation hardening?

what is mean by precipitation hardening?

Calculate resonant frequency, A vibrating system having mass 1.2 Kg is susp...

A vibrating system having mass 1.2 Kg is suspended by a spring of stiffness 1000 N/m and it is put to harmonic excitation of 10 N. Assuming viscous damping, Calculate : (a) R

Advantage of electro chemical machining, Advantage of Electro Chemical Mach...

Advantage of Electro Chemical Machining 1. As the tool does not come in contact with the work there for tool wear is practically nil. 2. The metal removal is faster rate.

Optimal feeder geometry, PART A A new process plant for ore processing ...

PART A A new process plant for ore processing is currently being planned. The design is only in the first stage. However, three requirements have already been clearly stated:

Airport layout - planning a new airport, Airport Layout: The main com...

Airport Layout: The main components of an airport are: (a)        Runways (b)       Taxiways (c)        Apron (d)       Terminal area (i)        Terminal build

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