Author Topic: Scissor type sinebar  (Read 4265 times)

Offline stefang

  • Jr. Member
  • **
  • Posts: 61
  • Country: de
Scissor type sinebar
« on: March 31, 2012, 06:25:48 PM »
Hi folks

A sinebar to set angles accurately was on my list for a long time...so I built one  :dremel:


Thats the plan:


First step was the body, it was machined from cold rolled steel, which was a bad decission, because its prone to warp when machined.

Here the material for the body is shaped to size:


Thats how it looks after a bit of milling. And there is the problem, due to the milling, the bottom surface warped 0,07mm concave. Not a big deal, it can be easiely corrected on the shaper, but still annoying.


Shaping the material for the sinebar itself, this time its hot rolled steel, as it is pretty stressfree. Note the fine finish, the shaper produces  :thumbup:


Drilling and reaming two holes, exactly 65mm apart:


Thats the fixture to machine the sinebar, a piece of aluminum with two M6 Threads, 65mm apart:


Machining the contour. The screw on the left was a bit in the way of the milling cutter... :palm:
But no problem, it held the part still secure in place.


Turned a bolt that acts as a pivot, and the roll which will sit on the gauge blocks. Its turned from tool steel, hardened, ground and finaly broken of the remaining material.


Finishing the surface, where the gauge blocks will go:


Short video of the machining:
http://www.youtube.com/watch?v=6VjoyqU9HOk
not very much clearance ;)

Test fit with a 1mm gauge block (equals a settign of 0):


Testing on the surface plate with the 1/1000 dial indicator:


I machined a Tumbscrew for the lock of the sinebar and heat-blackened it.


Also made a fence to align it on straight edges:


Then i made a small block with a dovetail...


And a bar with a slot..strange stuff


Then I cut a dovetail on the bar:


And thats how the bar, clamping block and sinebar go together. Makes adjusting the compound slide pretty easy  :D


And finaly a video of the achived precission, the indicator is a 1/1000mm type:
http://www.youtube.com/watch?v=8UcBU7L4rTs

Thats all for today  :)

Regards,
Stefan


Offline dsquire

  • In Memoriam
  • Hero Member
  • *****
  • Posts: 2280
  • Country: ca
  • Kitchener, Ontario, Canada
Re: Scissor type sinebar
« Reply #1 on: March 31, 2012, 07:18:25 PM »
Hi

Very nice Stephan and very well presented. That is a tool that you can be proud of.  :D :D

Cheers  :beer:

Don

Good, better, best.
Never let it rest,
'til your good is better,
and your better best

Offline Brass_Machine

  • Administrator
  • Hero Member
  • *****
  • Posts: 5202
  • Country: us
Re: Scissor type sinebar
« Reply #2 on: April 01, 2012, 12:09:50 AM »
Nice job. Like Don said... very nice presentation!

Eric

 :nrocks: :nrocks:
Science is fun.

We're all mad here. I'm mad. You're mad.

Rob.Wilson

  • Guest
Re: Scissor type sinebar
« Reply #3 on: April 01, 2012, 04:12:13 AM »
 :clap: :clap: :clap: :clap: Thanks for sharing your sinebar Stefan   :thumbup:

I see your making good use of your shaper  :med: :)

Rob

Offline DaveH

  • Hero Member
  • *****
  • Posts: 1413
  • Country: za
  • Kempton Park, South Africa
Re: Scissor type sinebar
« Reply #4 on: April 01, 2012, 04:24:20 AM »
Stefan

Very nicely made  :thumbup: :clap:

Well shown and photographed  :thumbup: :clap:

 :beer:
DaveH
(Ex Leicester, Thurmaston, Ashby De La Zouch.)

Offline doubleboost

  • Madmodder Committee
  • Hero Member
  • *****
  • Posts: 1621
  • Country: gb
  • Newcastle Upon Tyne
Re: Scissor type sinebar
« Reply #5 on: April 01, 2012, 05:33:19 AM »
Stefan

Very nice
Good clear post :thumbup: :thumbup: :thumbup: :thumbup: :thumbup:
I need a shaper
John

Offline stefang

  • Jr. Member
  • **
  • Posts: 61
  • Country: de
Re: Scissor type sinebar
« Reply #6 on: April 01, 2012, 03:49:45 PM »
Thank you guys :)

All I need to do, is make a nice wooden case for it...

Quote
I need a shaper

Every household needs a shaper  :D

Regards,
Stefan

Offline AndreasL

  • Jr. Member
  • **
  • Posts: 28
Re: Scissor type sinebar
« Reply #7 on: April 02, 2012, 02:00:07 PM »
Fab as all the other posts and project you presented.

And do I hear a bit of good old heavy metal in the background?  :headbang:

Hope to see a lot more posts in the near future from you.

Offline arnoldb

  • Hero Member
  • *****
  • Posts: 517
  • Country: na
  • Windhoek, Namibia
Re: Scissor type sinebar
« Reply #8 on: April 02, 2012, 02:03:32 PM »
Very nicely done Stefan  :thumbup:

There's one in my future too, but unfortunately not a shaper; I can only dream of that...

 :beer:, Arnold

Offline stefang

  • Jr. Member
  • **
  • Posts: 61
  • Country: de
Re: Scissor type sinebar
« Reply #9 on: April 03, 2012, 06:57:14 PM »
Quote
And do I hear a bit of good old heavy metal in the background?

Nothing else in my shop  :headbang:

:D

No problem to do it without a shaper, only with a mill..or only with a lathe. But you loose the meditative movement of the shaper-

Regards
Stefan