In the process of roll forming, due to the combination of the stress generated by bending and the residual stress of the strip, the formed profiles often appear side bending, warping, twisting, etc.
The best way to solve this problem is to install a straightening mechanism at the end of the roll forming machine, which can effectively solve various distortion problems, so the straightening mechanism is a very important part of the roll forming machine.
Common twists:
Side bending: bending in the horizontal direction,
Warp: Bending in the vertical direction
twist: helical twist
As shown below:
The basic principle of straightening:
In the case of side bending or warping, as long as the straightening mechanism exerts pressure in the opposite direction, when the strength of the straightening mechanism is adjusted to the appropriate level, it will permanently deform, and the profile can be corrected.
The straightening mechanism is generally installed between the last roll and the cutting device.
Common straightening mechanisms:
1. Straightening roller. Straightening rollers are the simplest and most durable straightening tools, and are simple in design, easy to install and low cost.
This kind of straightening device is very common in many roll forming machines, especially the roll forming machines made in Guangdong, which like to use the straightening method of two rolls and one roll. is a very important straightening mechanism.
2. Straightening die
Straightening die is also a commonly used straightening mechanism. It is designed to wrap around the profile section.
As shown below.
