Mill Boss on Cylinder

[TheePres]

Your opinion please on most efficient toolpath / approach to milling a round boss atop a cylinder. I have loaded BossTest.mc8 to FTP.

Would appreciate your comments.

Note: Red is stock from lathe, only need top half milled as no rotab available.

[cadcam]

Cant you put it some mill soft jaws a just to a 2d contour.

 

Do you want to do all the Color9?

 

this can make a little thought change but not much.

 

I am not sure why they did not lathe the hole part for that shape.

 

Picture of part

 

[ 06-12-2002, 09:56 PM: Message edited by: cadcam ]

[TheePres]

Im sorry, I didnt explain correctly, you need to blank all red to see boss feature.

Jay, your correct in jaws thats how im holding. what im after is toolpath selection advice, most effecient method of 3-D cutting to achieve finest finish and keep cut time down. Mat. is Hastelloy

[Scott Bond]

Hi

quote:

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most efficient toolpath / approach to milling a round boss atop a cylinder.

---

I would rotate this geometry to a verticle position, make a contour cut with cutter comp.

Then rotated back to the custom alumninum jaw postion, make mininmum amount of trimmed contours.

Then project them onto the cylinder.

 

My.02

[cadcam]

Theepress, I have updated your file and done preaty much what scott said but not with the trim thought.

I was not sure of what you were saying scott on the trim thoght.

 

File testbosscadcam.mc8

[Scott Bond]

Hi all

I know this is more wind than it's worth ,but here goes.

quote:

---

I was not sure of what you were saying scott on the trim

---

I would rotate this geometry to a verticle position, make a contour cut with cutter comp.

Then rotated back to the custom alumninum jaw postion. (earlier post)

 

I would then have a square looking shape that I want to make round. I would draw 2-d contours

of the existing square and of the boss(circle).

Offset the circle by the srep size of my contour cuts.Then I would trim the offset contours to the existing square. This would end up with little pieces of arcs in each corner of the square .The shape of the void when we put a radii on a square corner is called a SPANDREL.

So in four places I would program each of the corners off (SPANDRELS) localy one at a time,then the main diameter of the boss will be only one pass. Then do the projection.

[cadcam]

Ok I see.

I think the few of the of the what I conseder the 3D contour would work great & less work.

I used this a few times on the same type of work.

 

But yours can be useful for more stock in croner areas.

 

JM2C

[TheePres]

Thanks Jay and Scott,

 

Scotts Suggestion will work wonderfully.