[modeleng] Re: Fool question
- From: Patrick Coppens-Marian Lynch <develop@xxxxxxxxx>
- To: modeleng@xxxxxxxxxxxxx
- Date: Tue, 09 Oct 2007 18:45:26 +0200
"*that lead to this? Ductility*?"
This is one of the consequences of the arrangement of the metal atoms.
The cohesion between the molecules being another. Brass being an alloy, and
still having it constituents intact (ie not forming new different
molecules)only makes matters more complicated.
A cutting action, serves to sever the layers of material. Different stuff,
different knives.
You could cut a hamburger with a blunt knife, but you couldn't cut a piece of
raw ham with the same knife.
The same is true for metals, if you use the wrong 'knife' you just push the
molecules aside, instead of severing them from their next door neighbor
The "digging in" just shows, that the cohesion between the parts is too big,and
they stretch,instead of being severed.
In using a different cutting edge, you prevent that from happening
Patrick
peter.chadwick@xxxxxxxxxxx wrote:
> Jesse,
>
>
>> Positive rake on tools used with brass will cause the tools to "dig or
>>
> hog
> in" and damage the work.<
>
> Yes, but the real question is why? What are the physical properties of
> brass that lead to this? Ductility?
>
> Peter Chadwick
> Swindon
>
>
> ----------
> Zarlink Semiconductor Limited is a Company registered in England and Wales
> under number 00705031 with its registered office at Cheney Manor, Swindon,
> Wilts SN2 2QW, England.
>
> This email is confidential and may contain information that is privileged and
> exempt from disclosure by law. If you have received it in error, please
> contact the sender immediately by return email and then delete it from your
> system; you should not copy it or disclose its contents to anyone. Emails
> are not secure and cannot be guaranteed to be error free as they can be
> intercepted, amended, lost or destroyed, or contain viruses. Anyone who
> communicates with us by email is taken to accept these risks.
>
>
> MODEL ENGINEERING DISCUSSION LIST.
>
> To UNSUBSCRIBE from this list, send a blank email to,
> modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject
> line.
>
>
MODEL ENGINEERING DISCUSSION LIST.
To UNSUBSCRIBE from this list, send a blank email to,
modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.
Other related posts:
