Product category:
Cold roll forming systems and software
News Release from: UBECO | Subject: UBECO PROFIL software
Edited by the Manufacturingtalk Editorial
Team on 22 November 2007
Roll-forming trapezoidal sheet metal
profiles
After designing the final trapezoidal profile with the roll form design software, it produces the flower pattern for a trapezoidal profile automatically.
When wide sheet metal strips are roll-formed to a trapezoidal profile, the course of the band edge has a crucial influence on the quality of the product, said Ubeco, Germany On the one hand the course must be as short as possible in order to form the band edge elastically only
This article was originally published on Manufacturingtalk on 9 Oct 2003 at 8.00am (UK)
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The shortest connection between two point is the straight line - but the band edge is creased both at the machine entrance and exit.
This is why the second important point of view for choosing the right band edge course is the tangential transition at entrance and exit.
In practice, a linear function with fillet radii is often used or a cosine function.
* Trapezoidal 'flower pattern' produced automatically - after designing the final trapezoidal profile with the roll form design software UBECO PROFIL, the software creates the flower pattern for a trapezoidal profile automatically.
It can feature a cosine band edge course or linear course with user defined fillet radii as desired.
The roll forming process always starts with the inner trapezoids.
This is why the material should be able to 'flow' to the inside during bending.
The user can select whether the entire trapezoid or the trapezoid's flank should be formed simultaneously, as follows.
* If the trapezoid is formed simultaneously, fewer stands are needed.
A problem is when the material is impeded to 'flow' to the inside, which may cause deep drawing effects.
* If the trapezoid's flank is formed simultaneously, more roll stands are necessary and the material can better 'flow' to the inside.
A problem is that the band edge moves up and down, which causes higher stress.
The stress can be reduced by center line forming.
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