Tube bending is one of the most used processes in metal forming, and it is highly requested in industrial projects since it allows the creation of complex shapes in tubular elements, which can be used in a wide variety of applications.
However, even when qualified personnel and adequate technology are available, errors and setbacks may occur during this process. Next, we will learn about the main errors and setbacks during the tube bending process.
Errors during tube vending
In any industrial process, errors can be made. However, training and compliance with protocols, norms, and standards can prevent the following errors during the tube bending process:
Severe flexion
“Severe bending” is a common error that can occur during the tube bending process. This type of error can cause wrinkles on the inner wall of the tube bend, in addition to stretching and thinning on the outer wall. Generally, this type of error is caused by not knowing the physical and mechanical characteristics of the material, such as its bending strength or the thickness of its walls.
Incorrect parameters for the bending process
During the tube bending process, errors can be made by selecting the incorrect parameters to carry out the said process, which can cause the tube to stretch more than it can withstand, and therefore cause a significant structural failure, cracking, or fracturing of the tube. This error occurs when the maximum level of “elongation” that the piece presents for a certain radius of curvature is not taken into account or is not known.
Pipe bending setbacks
In the tube bending process, in addition to errors or defects in the parts, some setbacks can also occur:
Recoil
The “setback” during the tube bending process refers to the distance from the center of the bend to the point where the tube remains straight. To determine the level of recoil, the tangent of half the angle of curvature must be calculated; this value is multiplied by the radius of the bender.
Advance
The “advance” during the tube bending process refers to the distance the tube advances from the recoil location until it is straightened again. To determine the feed value, the curvature angle must be multiplied by 0.01745, and the resulting value must be multiplied by the radius of the bender.
Knowing the setbacks of the tube bending service is essential to obtain a more precise bending of the piece, in this way, the product obtained will be able to meet the technical specifications required by the project.
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