Please add helix style motion, for the Sequential Groove M.O.

Dave Frank

Please add helix style motion, for the Sequential Groove M.O.

Hi friends,

 

Please add helix style motion, for the Sequential Groove M.O.

 

This is an important issue, because without this enhancement,  you really can not use Sequential Groove for hard metals, and larger T-CUTTERS.

 

Here is the issue.

 

T-CUTTERS typically have 3-1 to 6-1 diameter VS Shank diameter ratios. This makes the cutter very weak. Aircraft designers usually design with the limit of dial-shank ratios in mind, when adding capped ribs, cantilevers, etc.

 

Furthermore, the radius of the Cutter, verses the entry hold diameters, is usually just enough for clearance. That means, the angular engagement at entry is the most of any type of cut you want to make. … Add a hard metal, like 174PH, HP9420, INCONEL, etc, and forget it, a simple arc in to a 360 cut will never work.

 

I want to thank Samarinder for calling this to my // our  attention. While I never used the Sequential Groove M.O, I am sure I will, and would like to get this ER in the list.

 

This is the beauty of the COE forum……. someone else is always the first one to observe. Noting it here, help makes CATIA of tomorrow the best for ALL USERS

 

 

Best Regards

Dave

Samarinder Singh

RE: Please add helix style motion, for the Sequential Groove M.O.
(in response to Dave Frank)
Dave,

Do you mean by helix style = new concentric spiral type motion?

Because I wanted to have spiral motion inside the cut and that is the best way to cut the hard metal whcih I learned back in 2004 from one of my collegues at CIRCOR aerospace.

However I had made a powercopy for that.




Dave Frank

RE: Please add helix style motion, for the Sequential Groove M.O.
(in response to Dave Frank)

Hi Samarinder,

I used the word helix, because the math / geo def........What is in an name?    Concentric motion, like the new roughing, is the kind of progressive cutting for the approach, and constant after that.   (Concentric as in ROUGHING just mentioned, is not really Concentric, it is a helix, )

The desired motion would be created, if you created a Helix in part design and drove it. So you could specify a radial stepover, .1, .05, what ever, and a helix would be driven and multiple revolutions with the tool would be created.

The approach could be axial, off the part, and once the helix motion is engaged, the approach would variably increase until 360 or a little more. Then to tool will be totally engaged, and each revolution will have a constant radial engagement, specified by the radial stepover, until the wall is touched. Then 360 deg of cut will be necessary to clean up the material. From there arc off, axial ......

Is that what you were thinking. Are we on the same page.

Dave

Dave Frank

RE: Please add helix style motion, for the Sequential Groove M.O.
(in response to Dave Frank)
I did not see the picture. Yes, thats it... a Helix

Samarinder Singh

RE: Please add helix style motion, for the Sequential Groove M.O.
(in response to Dave Frank)
OK then we are on the same page.

Basically it is a spiral motion and then at the end finishing the circle + option of spring passes.

Dave Frank

RE: Please add helix style motion, for the Sequential Groove M.O.
(in response to Dave Frank)
This is why we have a COE forum, and why Dassault listens.

They NEED to know from our real life metal cutting needs, how to make the software do its job

Alex Smygov

RE: Please add helix style motion, for the Sequential Groove M.O.
(in response to Dave Frank)
Totally agree, That we definitely need.

Roger Bombassei

RE: Please add helix style motion, for the Sequential Groove M.O.
(in response to Dave Frank)
A helix has z depth.

he·lix/ˈhēliks/Noun
1. An object having a three-dimensional shape like that of a wire wound uniformly around a cylinder or cone.
2. A curve on a conical or cylindrical surface that would become a straight line if the surface were unrolled into a plane.

I don't think you want z movement for this. Do you?

edit - Maybe definition # 2 doesn't have a z depth.

In any case, I think you are asking for movement that travels on a plane.  And that needs to be clear.

Maybe spiral is a better word.

SPIRAL as Noun Definition 1 A plane curve traced by a point circling about the center but at increasing distances from the center.

Dave Frank

RE: Please add helix style motion, for the Sequential Groove M.O.
(in response to Dave Frank)
Hi Roger

You are correct. No Z movement.
I used the word Helix..... because that it the kind of CATIA geometry I would create to make that cut until this enhancment is implemented

Samarinder Singh

RE: Please add helix style motion, for the Sequential Groove M.O.
(in response to Dave Frank)


Now DS has spiral strategy fully tuned in Pocketing MO. So this should not be a problem at all to add in the Sequential Groove MO.

Regards,
Samarinder

Bryan Carpio Felsher

RE: Please add helix style motion, for the Sequential Groove M.O.
(in response to Samarinder Singh)

This is a good enhancement.  Until it is added, I would suggest using a powercopy.  I know it takes longer, but that's what I do here, and it works really well.

If you don't want to use a powercopy, then you just have to create a spiral geometry and follow it with an MO.  That's basically what my powercopy does, except I just have to click the outside diameter, bottom plane, top plane, and tell it the cutter diameter and stock allowance to leave.  Since I like to use spiral type motion often, the powercopy saves a lot of time.

But yeah, having it in the MO would be great.  Probably within a couple releases it would be good enough to use....lol...

Samarinder Singh

RE: Please add helix style motion, for the Sequential Groove M.O.
(in response to Bryan Carpio Felsher)

I am aware of spiral geometry and have very robust powercopy for it.

It is not a matter of what you can do or I can do. It is a discussion for the enhancement request and by the way I have tons of powercopies including this. That doesnt mean I wont ask for the enhancements. I saw an opportunity to get the most out of this MO with some enhancements made. So I reported this about 4 years ago sending files to Mark (catprocess and a part with spiral curve in it)

Attached are some snapshots of the files I sent.

Regards,
Samarinder
Attachments

  • SequentialGrooveMO1.pptx (258.8k)

Bryan Carpio Felsher

RE: Please add helix style motion, for the Sequential Groove M.O.
(in response to Samarinder Singh)

I always get a good crack up....the arrow pointing to the date...lol...