swiss lathe tooling help

[reddog37]

I need advice for deep d.o.c. turning tools for a swiss type with a rotating guide bushing....

[CNCRim]

Depend on what material you are cutting, but for me I like start out with .05D.O.C with .007ipr for OD and .0012ipr for ID. Then listen to the sound while it cut and try to push more and more until it just right.

[DDM]

Yay more people who have swiss. Depth of cut kinda depends on the shape and size or your part. A lot of times I will take full depth cuts if I have a larger distance than the length of the facing on the guide bushing. I don't go for a real high feed rate but instead I use tooling that allows for faster surface feeds. On single pass turing I could be using 6k RPM and .001-.002 FPR. Give me an example of the part you are making and what kind of setup you have and I could give you a good idea of how I would make it. I've been Programming, Setting up and running a STAR SV32J-II for about 2 years now.

The Swiss are a different animal and anyone who has any questions, problems or comments please drop me a line.

Carl

[tobyaxis]

Well it is about time the Swiss people came around. I have been posting Greek about Swiss for months.

I use Cermet Inserts Uncoated for all O.D. cutting tools on a Swiss. It all depends on what your cutting and how long it is. I have cut Inconel X750 .125 Diameter down to .065 in one pass 3 inches long with .0001 taper.

What are you cutting?
BTW: I forgot to ask you what machine you were using???

DDM the STAR SV32J-II is a very nice machine. Do you have the automatic barfeeder that loads bars by itself and removes the bar ends?

[DDM]

I think once we get going on the swiss a forum might open up for itself

For tooling I've been using Sandvik stuff or should I say $andvik. For OD turning I'm using a CCMT coated incert along with a VCEX incert for backturning. For boring I've been using Sandviks hotrot CXS boring bars. They work great but are expensive.

For material we mainly use centerless ground 6061, 2011, 360 brass, 203 Stainless and 303 stainless. We use Blazer Swiss lube for coolent, beats the mess of using oil but has some drawbacks.

Any yes we are using an automatic bar feeder, it's an LNS I can't recall the model offhand but it is automatic load and unload. I have buckets full of 10" long scrap though.

Anyone else using the swiss or wondering about them please chime in.

Carl

[tobyaxis]

Originally Posted by DDM I think once we get going on the swiss a forum might open up for itself For tooling I've been using Sandvik stuff or should I say $andvik. For OD turning I'm using a CCMT coated incert along with a VCEX incert for backturning. For boring I've been using Sandviks hotrot CXS boring bars. They work great but are expensive. For material we mainly use centerless ground 6061, 2011, 360 brass, 203 Stainless and 303 stainless. We use Blazer Swiss lube for coolent, beats the mess of using oil but has some drawbacks. Any yes we are using an automatic bar feeder, it's an LNS I can't recall the model offhand but it is automatic load and unload. I have buckets full of 10" long scrap though. Anyone else using the swiss or wondering about them please chime in. Carl

With a Swiss it is recommended that one uses centerless ground stock that is at least .0005 overall taper. I remember a shop where they ordered regular stock. It was 440E and the Z axis was jamming a lot. I told them the Specs for Swiss Turning and they had a FIT. Oh well, not my money spent on Guide Bushings. I used to use Hardinge Collets and Guide Bushings. What do you use?

[adam dogg]

I have been a swiss programmer for about 8yrs.

currently programming Star machines SV32, SV32j-II, SB16, SR16.

Previously Citizen models.

I work in the orthopedic industry, and machine very hard material. from Ti to 316lvm, and this new crap called Biodur(really, really nasty)

The universal insert that I use is an Iscar order # DCMT 3-1-PF IC 907
this seems to work great in all sorts of material, and it actually works well in Biodur.

Any questions about swiss machining feel free to ask. I have lots of experience in thread whirling, thread milling, macro programming, loop cycles, surface machining and much more.

[tobyaxis]

Originally Posted by adam dogg I have been a swiss programmer for about 8yrs. currently programming Star machines SV32, SV32j-II, SB16, SR16. Previously Citizen models. I work in the orthopedic industry, and machine very hard material. from Ti to 316lvm, and this new crap called Biodur(really, really nasty) The universal insert that I use is an Iscar order # DCMT 3-1-PF IC 907 this seems to work great in all sorts of material, and it actually works well in Biodur. Any questions about swiss machining feel free to ask. I have lots of experience in thread whirling, thread milling, macro programming, loop cycles, surface machining and much more.

Are you machining complex Surfaces on a Swiss? Do you have any Pics? I have heard of this but never done it or seen it. Please share

BTW: What CAM Software are you using? Or is it all Macro and Sub-Programs?

[solgood]

New to swiss turning, we have a citizen L32 with a iamka bar feeder and just picked up a new L20 with a cav bar feeder. I would like to here your feedback on both these machines.

P.S. we have been running reg. bar stock on these machines with no problems, no need for ground stock.

[reddog37]

Hey DDM,
99% of the time I'm cutting 304L. The lathe is a Hanwha....some Korean brand. My boss likes to profile in one pass which can put the DOC at .270 on some jobs!!!!! We also use Blazer swiss lube. I can't break chips because of the bushing so I dont know if I need tooling with sharp edges or a dcmt with a .160 doc. Before I ask them to drop $300 I need to know what works. My main spindle rarely goes over 3000 rpm because it shakes the LNS sprint II loader too hard. I would love to break chips on the main side since it hasen't happend in the 5 months i've worked there. It's funny, even my supervisor doesn't want anything to do with the swiss. Thank you for responding to my thread and any help would be much appreciated.

[tobyaxis]

Originally Posted by solgood New to swiss turning, we have a citizen L32 with a iamka bar feeder and just picked up a new L20 with a cav bar feeder. I would like to here your feedback on both these machines. P.S. we have been running reg. bar stock on these machines with no problems, no need for ground stock.

That is do to using soft materials. Are you using Carbide lined Guide Bushings? The reason for the jamming issue is mainly due to a tight Guide Bushing. I set mine to .0001 to hold very tight tolerances. +-.0001 or better.

[tobyaxis]

Originally Posted by reddog37 Hey DDM, 99% of the time I'm cutting 304L. The lathe is a Hanwha....some Korean brand. My boss likes to profile in one pass which can put the DOC at .270 on some jobs!!!!! We also use Blazer swiss lube. I can't break chips because of the bushing so I dont know if I need tooling with sharp edges or a dcmt with a .160 doc. Before I ask them to drop $300 I need to know what works. My main spindle rarely goes over 3000 rpm because it shakes the LNS sprint II loader too hard. I would love to break chips on the main side since it hasen't happend in the 5 months i've worked there. It's funny, even my supervisor doesn't want anything to do with the swiss. Thank you for responding to my thread and any help would be much appreciated.

That is because Swiss Work is and ART of it's own. Most know nothing about them. Have you tried an extra bar stablizer Bushing. I had to make one at a shop to hit 10,000 RPM and above. Sandvik makes great indexable inserts for 1/2 inch shank Swiss tooling.

http://www.iscar.com/

They may be expensive, but they work.