hi
can anyone suggest me how to remove chips from workpiece during cutting by technique of vacuum sucking by some vacuum nozzle??
thanks

I use a venturi type extraction system. It works by forcing presurised air down a nozzle: this in turn creates a vacuum at the nozzle entrance. However, I do Diamond Machining and the swarf/ chips are extremely fine... my finish cuts are typicaly 0.002mm deep.

hi thanks you
actually i am also working on diamond turning..i wanted to remove chips from the work zone..i tried few methods for that particular work piece to remove chips, but i couldnot...i want to try this vacuum sucking method...thanks for the suggestion...

Wow! someone else who's doing Diamond Turning!!! Hi There :)

Are you machining Aluminium? if so I assume that the swarf comes of in a big long silvery thread?

The trouble I find with swarf extraction is that you can get it started, but it always clogs up eventualy.. even using the veturi system.

Incidentaly, I find that coolant positioining is important to force the swarf away from the tool.

When machining plastics I have a larg diameter extraction system from Air Cleaning Systems here in the UK, it needs cleaning abot once a week.

Oh, Diamond Machiners are notorious for taking their machines to bits and tinkering with them... be careful if you leave the enclosures off when machining Aluminium as the swarf conducts electricity and can short out boards etc.

Anyways! nice to meet you :)

i am not machining aluminum. we machine brittle materials like silicon. and now i am trying to machine a new optical material and i found problems regarding the chips, so i am finding proper method.
anyway nice meeting you too...

I have also machined brittle materials like Silicon, Germanium, Zinc Sulphide and Zinc Selenide etc.

I assume that the problem you're having is a poor finish?

The stuff I check to ensure a good finish are:

Tool Top Rake= -25 degrees (this is vital).

Coolant pointing upwards (beneath the tool).

Tool has to be a Natural Diamond (synthetic are no good).

The material I cut has to be mono- crystalline, polly crystalline cuts badly.

Vibration, vibration, vibration.

You've probably checked all these, but thought I'd mention it :)

hi iman,
could you please provide more info on venture type extraction system..
thanx

rajanish, You might look into the Vortec site. www.vortec.com Look at the Vortec and Paxton product lines for good information. I do not sell, represent or have any interest in Vortec/Paxton. I did use a vacuum method for chip removal in the past.

hi richard
thanx for the suggestion...i'll check out that site..i tried vacuum sucking but it was not efficient..so i am looking for better performance..my chips are very fine and its very difficult to remove from the machined surface...causing damage to the surface if i try to remove offline..