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

Thermal properties-ceramics-refractory and abrasive material, Thermal Prope...

Thermal Properties Each solid expand on heating and convention on cooling. The thermal expansion of solids is due to basic structure whether atoms occupy mean position on a fi

Steps for solving problem for finding power, STEP S FOR SOLVING PROBLEM FO...

STEP S FOR SOLVING PROBLEM FOR FINDING POWER: 1. Use formula stress (s) = force (Maximum Tension)/Area Where; Area = b.t that is, Tmax = σ.b.t 2. Unit mass (m) = r.b.t.

Find out the intensity of the external pressure, Find out the intensity of ...

Find out the intensity of the external pressure: A thick cylinder of 0.5 m external diameter & 0.4 m internal diameter is subjected simultaneously to internal & external press

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

The bronzes-copper alloys, The Bronzes The coinage bronze employed for...

The Bronzes The coinage bronze employed for making coins in earlier days contains 95% copper, 4% Sn and 1 % Zn. The Zn acts as a deoxidizer. Such alloy is soft and ductile.

Carbon and graphite, Carbon and Graphite Both are excellent refractory...

Carbon and Graphite Both are excellent refractory materials but with good grace oxidize and thus are used merely either in neutral or reducing conditions. Graphite is more sta

Structural steels, Structural Steels Low alloy steels are utilized fo...

Structural Steels Low alloy steels are utilized for structural causes. That type of steels is needed to possess high yield stress, excellent ductility and high fatigue resist

Design of a filament winding machine, How can I achieve a back and forth mo...

How can I achieve a back and forth movement of carriage system. How can I reverse the motor to go back and forth.

Hydraulic systems analysis, 1. A hydraulic pump generates 240W and supplies...

1. A hydraulic pump generates 240W and supplies hydraulic fluid at a rate of 5.1l/min to a linear actuator which has a bore size of 50 mm and a double piston rod diameter of 20mm.

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