×
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

Machining laminates with urethane interlayer

Machining laminates with urethane interlayer

Machining laminates with urethane interlayer

(OP)
Hi,

I am attempting to machining a laminate of acrylic/polycarb with an interlayer of urethane.  I have machined polycarb and acrylic before but never with the interlayer.  Since I have been told that machining urethane is totally different from the other plastics, I would like to know if anyone has machined urethane and also appreciate it if anyone can suggest tools and cutting parameters for the same.  A high speed router will be used for the application with AIR COOLANT (no liquid coolant) owing to nature of parts and the vacuum ports in the vacuum table.
Please let me know if you need further information.

Thank you.

RE: Machining laminates with urethane interlayer

What type of machining and operations are you looking to perform?

Milling, turning, drilling, tapping, etc.?
And what air coolant system are you using?
What kind of router bit? and size



Thanks

Quote: "Its not what you know, its who you know" - anybody trying to find a decent job

RE: Machining laminates with urethane interlayer

Urethane is not very nice stuff to machine as it basically pulls away rather than cuts and also tends to “dull” tooling very quickly.

The most important thing is to use sharp cutting tools (not tungsten or the like) with a rake angle of about 25 degrees and a clearance angle of about 15 degrees. As for cutting speeds if milling or routing use a cutting speed of about 100m/min air-cooling should be fine.

Good luck, I think you might need it.

RE: Machining laminates with urethane interlayer

Sounds like it might be better done with water jet.

Griffy

RE: Machining laminates with urethane interlayer

Well, some urethane machines very nicely. What shore hardness is it?

"I love deadlines. I love the whooshing noise they make as they go past." Douglas Adams

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