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

Production test rings, Q. Production Test Rings? The frequency for the ...

Q. Production Test Rings? The frequency for the tests shall be as follows: • One sample at the 10th joint • One sample at the 75th joint • One sample at the 300th join

Determine the coefficient of performance of the cycle, The temperature limi...

The temperature limits of an ammonia refrigerating system are 25 O C and - 10 O C. if the gas is dry at the end of compression, determine the coefficient of performance of the cycl

Strength of material, how will you apply principle of superposition in a st...

how will you apply principle of superposition in a stepped bar?

Illustrated about the term bending moment, Illustrated about the term bendi...

Illustrated about the term bending moment? Bending Moment The critical section for bending moment for masonry or concrete block walls is half-way between the centre line and

Does the selected system meet the requirements, Does the selected system me...

Does the selected system meet the requirements of the application (building purging, make-up air, filtration, ventilation)? Is the system suitable for the intended building usag

Explain Machining allowance, Can you show us - Overall length of external s...

Can you show us - Overall length of external surfaces, cm In image Material Cast Overall length of external surfaces, cm 0 to 30 30 to 60 60 to 105 1

Determine the rankine efficiency, A simple Rankine cycle works between pres...

A simple Rankine cycle works between pressures 0.06 bar and 28 bar, the initial condition of steam being dry saturated. Determine the cycle efficiency, specific steam consumption a

Objectives of motorcycle servicing , Objectives After studyingmotercyc...

Objectives After studyingmotercycle servicing, you should be able to appreciate the importance of regular servicing and maintenance of a motorcycle and also to recommen

Mechanical vibrations, The suspension system of a car is modelled as having...

The suspension system of a car is modelled as having an effective stiffness of 5x10 6 (N/m) and an effective mass of 750 (kg). The car is travelling over a road with bumps that ca

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