[MachineShop] Machine shop

[Denis Muradov]

I checked the plug on the mill, everything seems fine. The machine is good
to go, if anyone is waiting to use it. Problem one down, two to go.



On Fri, Nov 26, 2021, 9:52 AM Timothy M. Shead <tim at shead-custom-design.com>
wrote:

> Denis: sounds good!  John: your signature says “Back up instructor” … does
> that mean we can arrange some training before February?
>
> Many thanks,
> Tim
>
>
> On Nov 24, 2021, at 8:35 PM, Denis Muradov <denis.muradov at gmail.com>
> wrote:
>
> There are several ways to do this, and the cutter type can vary. Since it
> is 1095, carbide is probably the best choice. If you made a steel sandwich
> I'd say use a carbide bit for everything, with whatever flute amount but
> with other materials two flute carbide is better. Can't recommend any
> specific brands. You will need a few since you're bound to ruin the first
> couple. The white mill has a speed minimum but since the metal is so thin
> you're not going to generate any heat. Either way, it is hard for me to say
> the exact bit that you'll need. The one downside of carbide is that it can
> chip quickly from chatter.
>
> On Wed, Nov 24, 2021, 5:09 PM Timothy M. Shead <
> tim at shead-custom-design.com> wrote:
>
>> Denis & John:
>>
>> Thanks for the advice, I had assumed that work holding would be the main
>> challenge, and was imagining clamping the workpiece flat against a
>> sacrificial aluminum base, but I defer to your judgement.  Everything else
>> sounds good, I’ll need your recommendations for choosing cutters once we
>> get to that point.
>>
>> Cheers,
>> Tim
>>
>>
>> On Nov 24, 2021, at 1:31 PM, John P Anthes <jpanthes at comcast.net> wrote:
>>
>> Tim, Hi-
>> Am in agreement with Denis on the challenge of machining thin material.
>> Some ideas to think about are:
>>
>> 1) If the project Al sheet isn’t too wide, you might think about thicker
>> pieces on both sides of your slots. But with some sacrificial plywood
>> between your project and the steel bed.
>> 2) I wonder if you might consider glueing the thin aluminum sheet onto a
>> piece of sacrificial plywood as backing? The choice of glue is likely
>> important for conveniently removing the Machined aluminum later on. Some
>> solvent, and/or perhaps elevated temperature (heat gun), and patience may
>> provide a solution?
>>
>> Overnight soaking?
>>
>> Instructions for clean up removal of the glue may be written on the glue
>> container. Acetone is readily available and is used for clean up on some
>> glues, for example.
>>
>> John Anthes
>> Back up instructor
>>
>> Sent from John's IPad Air
>>
>> On Nov 24, 2021, at 12:08 PM, Denis Muradov via Machineshop <
>> machineshop at quelab.net> wrote:
>>
>> 
>> A new plug has been ordered for the mill, and it should be replaced soon.
>>
>> Can you provide more details on your project? Something that thin is
>> difficult to machine due to chatter. At one point I tried cutting a round
>> hole into 0.04 inch in mild steel myself and I had to use a jigsaw instead
>> because of chatter. It's possible to mill, but you'd have to build it up
>> carefully by adding reinforcement layers to keep it from vibrating. That's
>> at least one way I can think of. It's going to require some trial and and a
>> lot of error.
>>
>> A few notes about the shop: 1) The training we do is on aluminum. There
>> are cutters available for you to use but they are rated for aluminum use
>> only.  You will be tested on how you operate cutting aluminum, in a safe
>> manner. For cutting steel, this is something you will have to learn on your
>> own afterwards through practice, reading, etc. For cutting anything harder
>> than aluminum you need to use their own cutters, this is due to the
>> unforgiving nature of steel on mistakes. You can ruin a cutting bit on
>> steel in less than a second. 2) Last, the shop has a two man rule for
>> operating the milling machine and lathe, this means that someone must be
>> present in the same space you are in order to contact emergency services if
>> you have an accident. Acceptable locations are the machine shop, wood shop
>> and welding shop only. They need no training to do this, but they must be
>> able to hear you.
>>
>>
>>
>> On Wed, Nov 24, 2021 at 12:52 AM Timothy M. Shead <
>> tim at shead-custom-design.com> wrote:
>>
>>> Denis:
>>>
>>> To start, I’m interested in machining a simple pattern with slots into
>>> some annealed 1/32" 1095 sheet, followed by bending and heat treating.  My
>>> experience with machinery is limited to a drill press.
>>>
>>> Cheers,
>>> Tim
>>>
>>>
>>> On Nov 23, 2021, at 7:39 PM, Denis Muradov <denis.muradov at gmail.com>
>>> wrote:
>>>
>>> Sorry I did not see your email until now. What is your background and
>>> project need? There are a few challenges right now: the milling machine
>>> plug needs work, I need to order more blanks for training and my
>>> availability is limited until February.
>>>
>>> On Sun, Nov 14, 2021, 11:20 AM Timothy M. Shead via Machineshop <
>>> machineshop at quelab.net> wrote:
>>>
>>>> Denis:
>>>>
>>>> I am a new Quelab member and just received my orientation from Sherie
>>>> Pennebaker; I understand that you’re the person to contact about basic use
>>>> and safety training for the machine shop?  I’d like to get something on
>>>> your schedule if at all possible.
>>>>
>>>> Thanks in advance,
>>>> Tim
>>>>
>>>> --
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>>>>
>>>
>>> --
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>>
>>
>>
>
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