Let's see if Emc can help me on this one....

[Guest]

I have a part 304 SST, part finish thickness is 3mm with an N6 / 32 finish ±.0019 on the thickness

 

The extents of the part are 2.75" x 2.00" and there is shape milling around the outside and some holes to be drilled

 

As you can probably guess, I am having part curling issues after we remove the scaling on both sides, we started with 1/4" material

 

I need to change the process on this one, I cut 33 pcs, we wound up with 6 good, that is completely unacceptable

 

I am thinking about trying to find some 3mm stock, the difficulty in that is finding it but also the face surface finish requirements, from there I am leaning towards either laser cutting or wire cutting for the general shape

 

Looking for either stock sources or even ideas

 

Have at it

[gcode]

water jet then double disc grind

[jeff]

Agree with Gcode.

Otherwise you will have to flip flop the part a billion times to get it flat.

[Del.]

My experience with thin parts on WEDM is the first part will curl and after that remain flat.

[Guest]

Problem solved,

 

sending them out for Laser and lapping

 

That was an easy discussion

[jeff]

delete

 

stupid double post

[Jayson Kramer]

I am with Gcode I was thinking grinding before I read his post. the waterjet is another for sure the way to go.

Let us know how it all comes out for you John.

[?Mark]

Buy material from Carpenter steel

[Prodoggg]

I have had good luck with similar parts by having the stock double disc ground to thickness and finish specs. Then try stacking a few on a fixture with clamps and machining the outside shape using a relatively small dia. end mill as to not introduce too much stress into the part, of course use a rough and finish cutter not letting the rougher get too dull. You may be able to use some of the holes to screw down the part also. Best of luck to ya