Connecting and aligning precision rails
Connecting and aligning precision rails
(OP)
Hi there!
We are installing some precision rails for the movement of one of our systems.
We have chosen the SHS LC45 model from the THK company,
https://tech.thk.com/en/products/index.php?tar=285


We need to separate this in two sections, one of 1 meter and another one of 7 meters. We have two platforms like this:

I would like to ask for help how to install and align these rails.
In order to gain some height and have a good surface I was thinking about putting them on IPN or HEB profiles; since the rail holes is centered this would interfere with the profile web, so an intermediate part can be included (pink part):

One can see a gap between the end of the rail and the end of the profile, this is for the next section of the rail. If the second one goes on the top of the first part of the profile it will fit and be aligned better.
The idea is machining the profiles to get a proper surface for the rails. The screw holes in the rails have some play with the screws, so we can align it horizontally. But in 7 meters this play could not be enough to get them aligned.
Also, how can one adjust the height? There is maximum load of 3-4 metric tons.
Lots of screws to regulate the height?
I will appreciate your help regarding this topic
Thanks!
http://i60.tinypic.com/91htvp.png
We are installing some precision rails for the movement of one of our systems.
We have chosen the SHS LC45 model from the THK company,
https://tech.thk.com/en/products/index.php?tar=285


We need to separate this in two sections, one of 1 meter and another one of 7 meters. We have two platforms like this:

I would like to ask for help how to install and align these rails.
In order to gain some height and have a good surface I was thinking about putting them on IPN or HEB profiles; since the rail holes is centered this would interfere with the profile web, so an intermediate part can be included (pink part):

One can see a gap between the end of the rail and the end of the profile, this is for the next section of the rail. If the second one goes on the top of the first part of the profile it will fit and be aligned better.
The idea is machining the profiles to get a proper surface for the rails. The screw holes in the rails have some play with the screws, so we can align it horizontally. But in 7 meters this play could not be enough to get them aligned.
Also, how can one adjust the height? There is maximum load of 3-4 metric tons.
Lots of screws to regulate the height?
I will appreciate your help regarding this topic
Thanks!
http://i60.tinypic.com/91htvp.png






RE: Connecting and aligning precision rails
RE: Connecting and aligning precision rails
RE: Connecting and aligning precision rails
In the smaller installations I have done in my machine construction job some eyars ago, one rail was installed on the prepared surface, then a rolling charriot was placed on it, with a dial gauge on a magnetic base, in order to measure the distance between both rails. Then the second rail was fastened into place, while driving accross the whole length with the dial gauge, making sure the distance inbetween both rails was kept in the tolerance band.
RE: Connecting and aligning precision rails
But the dial gauge will certainly come in handy when checking every aspect of the geometry.
RE: Connecting and aligning precision rails
Thanks for the answers.
The 7 meter rails will be dismounted after the positioning of our system (the small platform moves away -with our system- in perpendicular direction to the rails).
For the final alignment we will have a laser tracker, so we can find the final position; the problem is how to move them.
And the biggest problem is how to move them vertically, how to shim them.
The shim must be done within one milimeter in a very long part.
kingnero, the chariot idea is very nice. I take note. How did you adjust the rails after knowing the position?
thanks
RE: Connecting and aligning precision rails