laser beam machining

Laser: Light Stimulated emission of Radiation. Laser beam machining is a non-conventional machining method.

Here today we are going to study Definition, Working Process, Principle, Advantages, Disadvantages, and Application.

Note: At the bottom of the articles you can easily download PDF.

So let’s start with the definition first,

Laser Beam Machining Definition:

A laser beam is a non-conventional machining method in which the operation performed by the laser. The laser stand for Light stimulated emission of radiation. The process used thermal energy to remove material from a metallic surface.

Laser Beam Machining Working Principle:

The working principle of laser machining is,

laser beam machining
Laser Beam Machining

In LBM, Laser means:

Light Amplification by Stimulated Emission of Radiation.

In this process, the Laser Beam is called monochromatic light, which is made to focus on the workpiece to be machined by a lens to give extremely high energy density to melt and vaporize any material.

The Laser Crystal (Ruby) is in the form of a cylinder as shown in the above figure or Diagram with flat reflecting ends which are placed in a flash lamp coil of about 1000W.

The Flash is simulated with the high-intensity white light from Xenon.

The Crystal gets excited and emits the laser beam which is focused on the workpiece by using the lens.

The beam produced is extremely narrow and can be focused to a pinpoint area with a power density of 1000 kW/cm2. Which produces high heat and the portion of the metal is melted and vapourises.

Laser Beam Machining Application:

The following application of Laser beam machining is:

  • Laser beam machining process is used for making very small holes.
  • Complicated welding of non-conductive and refractory materials.
  • Mass macro machining production.
  • Selective heat treating of materials.
  • This is used in surgery.
  • Micro-drilling operation.
  • Photography in medical science.
  • Spectroscopic Science.

Laser Beam Machining Advantage:

The following advantages of laser beam machining are:

  • Any material can be machined including non-metal.
  • There is no direct contact between the tool and the work.
  • There is no tool wear.
  • Soft materials like rubber, plastic can be machined.
  • Extremely small holes can be machined.
  • No mechanical force on the work.
  • The heat-affected zone is very small.
  • Heat treated and magnetic materials can be welded, without losing their properties.

Laser Beam Machining Disadvantage:

The following disadvantages of laser machining are:

  • The overall efficiency of the machining is very low.
  • It is limited to thin sheets.
  • It’s having a high cost.
  • A very low rate of metal-removing.
  • The life of the flash lamp is short.
  • It is not possible to remove a large number of metals.
  • The machined holes are not round and straight.
  • Not able to drill too deep holes.

So this is all about Laser Machining, I hope you like my article. I also wrote articles on some other processes do check out those too.

And moreover do not forget to share the article on your favorite social platform.

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What is LASER stands for?

LASER stands for Light Stimulated Emission of Radiation.

What is Laser Machining?

Laser Machining is used for very micro-operation.

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What are the advantages of Laser Machining?

Any material can be machined including non-metal.
There is no tool wear.
Soft materials like rubber, plastic can be machined.
There is no direct contact between the tool and the work.

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About the Author

Amrit Kumar

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Amrit is a Co-founder of Learn Mechanical Portal (Previously owned ""). He completed his diploma in Mechanical Engineering from Acharya Polytechnic Bangalore and also completed his B-Tech from Delhi.

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