CAD CAM EDM DRO - Yahoo Group Archive

Re: [CAD_CAM_EDM_DRO] Re: Questions about chipbreaking inserts.

Posted by Kim Lux
on 2003-09-30 09:53:23 UTC
I'll try heavier cuts and report back.

Kim



On Tue, 2003-09-30 at 10:21, doug98105 wrote:
> Terry & Kim,
>
> I think it is on topic. Chip breaking is very relevant to automatic
> machining, without chip breaking you can't effectively machine
> automatically as Kim is finding out.
>
> The problem as I see it is not enough HP, too light a feed and depth
> of cut. When I run into a problem of non-chip breaking I up the
> feed and depth of cut. .020" depth of cut is awfully small to
> expect chip breaking.
>
> The insert style, triangle, is okay, but for heavy cuts I think an
> eighty degree diamond may be better. Besides being a more rigid
> insert the diamond can both turn and face. The triangle is limited
> to turning or facing, but not both with the same setting.
>
> Doug
>
>
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Terry Owens"
> <wotisname@l...> wrote:
> > Hi,
> >
> > This is really a machining problem and as such has no place on
> this list. I
> > have been machining stainless steel for a few weeks with the same
> problems
> > if you want to email me offlist.
> >
> > Regards,
> >
> > Terry
> >
> >
> > > We are running chip breaking inserts on our CNC retrofit lathe.
> (13x40,
> > > 2 HP)
> > >
> > > We've got a little problem with swarf buildup, actually a big
> problem.
> > > When we machine a part of considerable size, removing a
> significant
> > > amount of material, the swarf will build up around the chuck,
> choke the
> > > coolant flow to the tool, etc. We often can't run a complete
> program in
> > > one go without having to periodically stop and clean things
> out. This
> > > becomes a big pain.
> > >
> > > Details: we are running TCMT321 (7 degree rake) inserts. This
> weekend
> > > we were machining 3" diameter 4140 steel parts. Total volume of
> > > material removed was about 6 inches^3. We were turning at 750
> RPM,
> > > feeding a nominal F6 on a 20 thou cut. By nominal, I mean that
> someone
> > > might have been running a 50 to 300% feedrate override. Our
> tool height
> > > is set almost exactly at center height.
> > >
> > > The "chips" we were getting off are really 6" to 18" long swarf
> > > stringers. We have machined steel and gotten actual chips off,
> but I
> > > can't remember exactly when or under what conditions.
> > >
> > > Questions:
> > >
> > > a) what sort of chip breaking performance should we be seeing ?
> > >
> > > b) would the lack of chip breaking performance have anything to
> do with
> > > running a relatively small insert (ie 321) for the depth of cut ?
> > >
> > > c) how does one prevent a massive buildup of swarf in and around
> the
> > > chuck and tooling ?
> > >
> > > Thanks in advance,
> > >
> > > Kim
>
>
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--
Kim Lux <lux@...>

Discussion Thread

vlocci 2003-09-29 07:48:31 UTC software questions DRO Jon Elson 2003-09-29 09:57:52 UTC Re: [CAD_CAM_EDM_DRO] software questions DRO Kim Lux 2003-09-29 10:09:23 UTC Re: [CAD_CAM_EDM_DRO] software questions DRO Kim Lux 2003-09-29 10:34:01 UTC Questions about chipbreaking inserts. turbulatordude 2003-09-29 10:41:37 UTC Re: Questions about chipbreaking inserts. mayfieldtm 2003-09-29 11:58:03 UTC Re: Questions about chipbreaking inserts. ballendo 2003-09-30 04:26:22 UTC Handwheels on a retrofit? Why!? was Re: software questions DRO c_holm10017 2003-09-30 07:32:54 UTC Re: software questions DRO R Rogers 2003-09-30 07:33:42 UTC Re: [CAD_CAM_EDM_DRO] Handwheels on a retrofit? Why!? was Re: software questions DRO vrsculptor 2003-09-30 07:48:13 UTC Handwheels on a retrofit? Why!? was Re: software questions DRO doug98105 2003-09-30 07:52:10 UTC Handwheels on a retrofit? Why!? was Re: software questions DRO Kim Lux 2003-09-30 08:42:49 UTC Re: [CAD_CAM_EDM_DRO] Handwheels on a retrofit? Why!? was Re: software questions DRO Terry Owens 2003-09-30 08:42:55 UTC Re: [CAD_CAM_EDM_DRO] Questions about chipbreaking inserts. Kim Lux 2003-09-30 08:46:15 UTC Re: [CAD_CAM_EDM_DRO] Handwheels on a retrofit? Why!? was Re: software questions DRO doug98105 2003-09-30 09:21:56 UTC Re: Questions about chipbreaking inserts. Tim Goldstein 2003-09-30 09:48:24 UTC RE: [CAD_CAM_EDM_DRO] OT: Questions about chipbreaking inserts. Kim Lux 2003-09-30 09:53:23 UTC Re: [CAD_CAM_EDM_DRO] Re: Questions about chipbreaking inserts. Kim Lux 2003-09-30 10:23:39 UTC Re: [CAD_CAM_EDM_DRO] Re: Questions about chipbreaking inserts. Torsten 2003-09-30 13:48:36 UTC Handwheels on a retrofit? Why!? was Re: software questions DRO Chris Seeley 2003-09-30 16:13:42 UTC Re: [CAD_CAM_EDM_DRO] Handwheels on a retrofit? Why!? was Re: software questions DRO R Rogers 2003-09-30 16:13:52 UTC Re: [CAD_CAM_EDM_DRO] Handwheels on a retrofit? Why!? was Re: software questions DRO R Rogers 2003-09-30 16:13:58 UTC Re: [CAD_CAM_EDM_DRO] Handwheels on a retrofit? Why!? was Re: software questions DRO Lee Studley 2003-09-30 16:18:16 UTC Handwheels on a retrofit? Why!? was Re: software questions DRO ballendo 2003-10-01 05:44:16 UTC Handwheels on a retrofit? Why!? mayfieldtm 2003-10-01 08:03:51 UTC Re: Handwheels on a retrofit? Why!? ballendo 2003-10-02 04:23:29 UTC Re: Handwheels on a retrofit? Why!?