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Anonymous Poster #1

Cutting Force & Clamping Force Calculation Require

10/13/2015 1:46 AM

Dear All,

Can Any one help in calculation of cutting force in 2 inserted brazed carbide 0 angle (7 degree primary clearance) plunging of Ø12 m.m on brass material,or material base diameter wise operation method wise cutting force detail It may be plunging or interpolation.With this cutting force what will be the clamping force require?

Thanks,

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#1

Re: cutting Force & clamping force calculation require

10/13/2015 2:47 AM

Clamping force generally should be more than cutting force but only if the force act on the same pane. Otherwise clamping force needs to just hold the item to be cut.

Beware of side forces.

Not enough information on what you are doing.

Here is an example.

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#2

Re: cutting Force & clamping force calculation require

10/13/2015 2:51 AM

Are we talking about a drill or a milling cutter here?

The mention of "interpolation" suggests a milling cutter, so are you referring to circular or helical interpolation in order to create a larger diameter hole than the cutter could otherwise produce? This method will obviously reduce the machine load, so you will have differing results for the various methods envisaged, but the feed rate may be reduced as the cutter has to complete the orbit. Also the size of the cutter and the depth of cut will have an effect.

If an edge cut rather than a hole, then you would need to consider whether both cutters are in contact with the work surface simultaneously, whether up or down milling, etc.

You will also need to consider the cutter surface speed, diameter of cut and plunge rate, as they will all affect the applied torsional load.

Having said all of that, I have no idea how you would calculate the actual clamping force... just make it bloody tight.

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Anonymous Poster #1
#3
In reply to #2

Re: cutting Force & clamping force calculation require

10/13/2015 3:24 AM

I am talking about all possible method possible for such hole.

We presently using brazed carbide 2 inserted tool & direct plunging, what ever force exerted by tool,we can give 2 to 3 time more force for clamping,

we require cutting force to judge clamping force require.we have limitation in fixture ,so for high parameter this calculation is must.

Thanks

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#4

Re: Cutting Force & Clamping Force Calculation Require

10/13/2015 8:53 AM

A Machinist hand book would have these.

The one thing you have to look at is chip load. Depending on the cut requirements and environments, all of these can vary with tool geometry. Such as:

  • Single Flute
  • Double Flute
  • Spiral up cut/down cut
  • Climb Cut vs. Conventional Cut
  • ect....

As well as the actual cutting edge, fortunately you are talking about a end mill, now if that was a ball mill, then you would have things like a 3 flute ball mill with a helical gash such as from Robb Tool (reduces the center dead spot on a ball mill).... (been over 20 years since I used that terminology)

When I worked at the ship yard, the cutting environment can change also... such as coolant requirements. We had did a pretty extensive study on this using numerous variables.

There is a lot of knowledge require here.

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#5
In reply to #4

Re: Cutting Force & Clamping Force Calculation Require

10/13/2015 11:48 PM

I get the feeling that the OP should think about employing a tradesman as he doesn't want to pay for an engineer or do his own thinking.

BAB.

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