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

Explain the Vacuum or vacuum pressure, Vacuum Or Vacuum pressure (P vacc ) ...

Vacuum Or Vacuum pressure (P vacc ) It is the pressure of a fluid that is always less as compared to the atmospheric pressure. Pressure (that is vacuum) in a steam condenser is

New rule with local one step ahead prediction: wls rule, New Rule with Loca...

New Rule with Local One Step Ahead Prediction: WLS Rule Along with an observation to improve the performance measure of the system, a dynamic posteriori rule, the WLS that is

Determination of wind-induced forces on pressure vessels, Q. Determination ...

Q. Determination of Wind-Induced Forces on Pressure Vessels? ASCE does not provide the complete methodology needed to account for wind-induced forces on common appurtenances to

Gear complaints of engine starting, Gear Complaints Nature of Complaints (...

Gear Complaints Nature of Complaints (a) Gear shifting hard (b) Gear slipping (c) Gear noise

Distance between nozzles, Every loaded blade rod is consists of 400 pieces ...

Every loaded blade rod is consists of 400 pieces of blades which around 25cm tall. The blasting nozzle vertical height different is just about 10 cm. The nozzle will blast the blad

What are objectives of the footings, What are objectives of the footings? ...

What are objectives of the footings? Objectives of the footings: After studying this unit, you should be able to: a. Know different types of footings and the situation wh

Classification of electrodes, CLASSIFICATION OF ELECTRODES The classifica...

CLASSIFICATION OF ELECTRODES The classification system used in the specification AWS A 5.1 which is for carbon steel electrodes follows established pattern for AWS filler metal s

Explain double bolting, Q. Explain Double Bolting? Where low strength b...

Q. Explain Double Bolting? Where low strength bolts must be used, initial bolting with higher strength low temperature bolts may be necessary to minimize accumulative strain an

Explain the adiabatic system - thermodynamic, Explain the Adiabatic System ...

Explain the Adiabatic System - Thermodynamic Adiabatic System: A system along with adiabatic walls can just only exchange work and not heat with the surrounding is known as Adi

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