Originally Posted by
JDenyer232
Ok heres the situation. We have an sl-10 lathe, and they want me to turn a part that is 0.060" in diameter and 0.800" in length. Obviously this part is to small to use a live center on, and it tapers badly, the material is 360 brass. I was able to write a program that faces it down 0.005" at a time by using a subprogram in incremental mode. This eliminated the taper, but left tool marks that are about 0.0005" deep. The owner states that the surface finish needs to be nice and clean with no tool marks. I was able to get the finish by hitting it with emery paper and the owner was quite pleased. I am the head machinist for a microwave filter company so at this point its just R&D. Quantities are 500 pcs or less, after that I would send it to a swiss screw machine house. Anyone have any ideas, currently the machining cycle time is 5 minutes which I find acceptable, I just want to eliminate having to hit it with emery cloth for an additional 5 minutes to get a clean surface. Any ideas on how to accomplish this? Thanks in advance to all that reply.
Try this:
Make a Center Post to use the Tail Stock.
Make the diameter a little smaller but long enough to use the tail stock.
Light pressure on the tail stock
DOCs should be very light .02.
Use a VNMG430 (330) insert.
Feeds and Speeds Very low.
I have done plenty of little parts like this.
If parts like these come in your shop it would be wise for your employer to buy a Swiss.
Toby D.
"Imagination and Memory are but one thing, but for divers considerations have divers names"
Schwarzwald
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)
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