Dear Ghislain,

I checked your drawing of the cavity,it's a simple shape.
According to the attached picture, the cutting length is 56.5*2+90=203mm(A¡úB¡úC¡úD),
 cutting thickness is 80mm, so the cutting area is about 16240mm2.

Our machine's max efficiency for cutting the material you listed is 160-200mm2/min, 
that means it will cost about 81~102 minutes to finishing this process. 
Also, it is more convenient to fix the work piece on the holder,
save much more time than brass wire edm.

I think you could visit one of our dealers if you have time or send one sample to them for test.
Our dealer have our machine in their stock.

By the way, according to your work piece size, the best model for your company is FR400S, 
4 axis Mitsubishi servo motor control, cutting speed could reach at max 200mm2/min,
max cutting thickness is 250mm, max work piece load is 350Kg.

At last,attached an operation instruction for using our software, for your reference, 
It will only cost one or two days for your operator to study.

If any more questions please contact me freely.
------------------
Alex Wang
International sales manager
KUNSHAN RUIJUN MACHINERY CO.,LTD
Add:No88 Suhang Road,Kunshan,Suzhou,China
Mobile No/WhatsApp£º+86-15062304154
Email: alexwjx@foxmail.com; alexwjx@outlook.com
QQ/WeChat£º755638506
Website:www.ksrjjx.com