×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

temperature of machining

temperature of machining

temperature of machining

(OP)
Hello,

does any of you met drawing documentation which specifies temperature of workshop where machining proces is being realised?
it is about details made from aluminium

Thanks, M.

RE: temperature of machining

Of the workshop? Makes no sense, other than "worker efficiency". (OSHA-type local code maybe?)

Of the material before or after machining?
Temperature controls of the metal are often needed as it is being cut to avoid problems.

Sometimes specified in storage to prevent metalurgical issues, but that's very rare. We've had questions about ultra-high precision parts needing temperature control while machining to get within the tolerances: (Too hot overall and the dimensions change.)

RE: temperature of machining

Not machining as such but implicitly for inspection:


Quote (ASME Y14.5M-1994 (1.4 k))

Unless otherwise specified, all dimensions are applicable at 20°C (68°F) Compensation may be made for measurements made at other temperatures.

Posting guidelines FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm? (probably not aimed specifically at you)
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?

RE: temperature of machining

Environmental control of inspection facilities is common practice in the aerospace industry. For some types of machine tools that must consistently maintain very tight tolerances (precision grinders, jig bore machines, or machines with integral digital inspection capability) it is necessary to maintain control of the environment the machine is calibrated at.

These manufacturing process controls are not usually specified on engineering drawings. The engineering drawing simply defines what is required in the finished product. It is manufacturing's responsibility to take whatever actions are necessary to produce a product that meets the requirements defined on the engineering drawing.

RE: temperature of machining

As noted above, the tolerances tell you what you need to know.

....

I was hoping for an opportunity to tell about watching orange-white chips fly off steel forgings being machined with carbide tools.
... but that will have to wait for another day.

Mike Halloran
Pembroke Pines, FL, USA

RE: temperature of machining

Those chips burn arms and fingers and shoes when they land on un-protected flesh. A good reason to ALWAYS have full eye protection on BEFORE you go in the shop.

RE: temperature of machining

As mentioned above with tolerances plus calibrated measuring instrument must be within certain temperature limits.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources