[AT] OT: non-tractor covid-19 activates
Cecil Bearden
crbearden at copper.net
Fri Apr 3 09:01:31 PDT 2020
After Ithought a little, I forgot about the 48x120 gap bed lathe, the
24in shaper, the 12x36 surface grinder and the other one sitting outside
that was dropped off a forklift at the shippers. I have a 36in Yates
American Bandsaw that a forklift operator dropped while loading. It was
one the Navy owned during WWII that sawed the decking for ships. I have
another 36in that I need to try to get working. I also have a 40 ton
horn press. in addition to the 40 ton ironworker. and a Warner swasey
#2 turret lathe, and somewhere around here is an old screw machine.
There is a couple of multiple spindle drills and all manner of old
machines.... There are not very many young folks that know how to
operate these old machines. Just not a lot of demand for one-off repair
work either.. Both old guys that were my teachers in my machine work
are now gone..
On 4/3/2020 10:46 AM, Stephen Offiler wrote:
> I was just out on the factory floor and noticed one of the CNC's was
> about to hit a bar change, and figured I'd try to capture a video of
> the whole thing. It starts with a quick overview of the CNC and the
> bar feeder sitting at idle. Then it shows the part being made, which
> is the handle of our double-ended machinist scribe. Then I fire it up
> to make the last possible part before the bar is effectively consumed,
> then we see a part being made, although it is kind of hard to see due
> to the coolant splash. Then it does the bar change, consisting of
> pulling back the "remnant" (the end of the bar that's now too short to
> make another part) while dropping a new 12' bar, engaging it, and
> feeding it into the machine to continue automatic operation.
>
> https://youtu.be/uy57CqHdicg
>
>
> SO
>
>
> On Fri, Apr 3, 2020 at 10:27 AM Stephen Offiler <soffiler at gmail.com
> <mailto:soffiler at gmail.com>> wrote:
>
> Wow, Cecil, that's quite an equipment list! Some big heavy stuff
> on that list! The only manual machining I do is making little
> tools, jigs & fixtures, and "my" shop here at work has just one
> (very nice) Hardinge HLV-H "Super Precision" lathe, a 2J-head
> Bridgeport, a Kent 6x18 grinder, and a DoAll bandsaw. The magic
> is always in the accessories; the 5C collets and the 4-jaw chuck
> for the Hardinge, the R8 collets for the mill, the various
> precision vises and other workholding for mill & grinder, indexing
> heads, and a whole compliment of cutters, drills, taps, wheels,
> etc etc.
>
> Oh and I do owe you a response on the ESAB plasma cutter.
> Unfortunately, it's a pass. Sorry. We have this one job we're
> developing now that involves making rather precise cuts, but we're
> already down that road with a chop-saw that's working quite well.
> We just do basically zero with sheet material most suited for plasma.
>
> SO
>
> On Fri, Apr 3, 2020 at 9:54 AM Cecil Bearden <crbearden at copper.net
> <mailto:crbearden at copper.net>> wrote:
>
> I planned to open a machine shop when I retired.. However,
> here in OK
> there is not much demand and the only jobs I had were making some
> decorating crap for some traveling vendors. The biggest job
> was wire
> forming for some Potpourri Pie holders. I had to build a jig
> to bend
> the handles with an air cylinder and rack and pinion. Then I
> had to roll
> a ring and weld it together with m spot welder then spot weld
> the rings
> to the handles The handles were also the feet to hold it
> above the
> stove burner. I lost the pics of it. I had a 20KW spot
> welder and had
> traded for a 10hp Variable frequency driver and motor from a
> technical
> school. I dropped the amperage with the variable frequency
> drive to
> keep from burning the wires up. The wires were about 3/16 dia.
> It was fun for a while, then I felt like I was wasting my
> talents on
> crap... Machine shops were closing down here to send jobs
> offshore.
> So, I have a building with a 36x120 lathe, a 16x84 lathe, a
> 9x40 lathe,
> a Cincinnati Mill with a 16x72 table and universal head, 2ea
> Kearney
> Trecker mills with universal heads, another later model
> Cincinnati
> overarm mill with a 16 x 72 table, A Bridgeport, a couple of
> knee mills
> one Japanese, the other old old US made. I did one job with
> the newer
> Cincinnati overarm making T-nuts for a big holding table. Now
> they just
> sit in case I need to make a part for my old junk. Then I was
> going to
> build industrial engines, and bought the boring bars, head work
> equipment and a big big crank grinder. Never got the crank
> grinder set
> up. It is still on a trailer and a stray tornado took out the
> building
> it was stored under.
> Cecil
>
> On 4/3/2020 7:01 AM, Mark Johnson wrote:
> > Hey - no problem with the CNC talk, at least not from me.
> I've been a
> > software guy all my life but I find machining absolutely
> fascinating -
> > wish I had learned more about it! I'm learning now...
> >
> > Mark J
> >
> > Columbia, MO
> >
> > On 4/3/2020 5:38 AM, Stephen Offiler wrote:
> >> Hi John -
> >>
> >> Hope the list will tolerate some CNC banter. We have 1 job
> that we
> >> hold close, using .0001" offsets; all the rest it would be
> more like
> >> .0005" or more. Swiss excels in small precise stuff and
> also long
> >> slender stuff, and we are heavy on the latter. Don't need
> all that
> >> precision, but it's handy to have: I can give the guys
> setup sheets
> >> with .XXX" dimensions and no tolerance, and they can hit
> the numbers
> >> dead-on quite easily. Keeps me from having to even think about
> >> tolerances which is quite a luxury for an engineer.
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