Steel tube bending is a process enabled by a range of machines, yet the most widely-employed is the rotary draw bender. This forms bends within the steel tube via mounting a die onto a mandrel. The latter is inserted into the steel and when rotated, the tube is drawn by way of the die. Whether it be a hydraulic or pneumatic machine, this action renders industry-standard curves.

Before embarking on steel tube bending calculations, it is essential to consider the wall thickness, diameter, and length of the tube. These three dimensions will determine the minimum radius that can be achieved, the force needed for the bending process, and the amount of time it will take to complete it.

When it comes to bending steel tubing, wall thickness plays a pivotal role in the calculations involved. This is due to the fact that a specific mathematical equation is used to determine the minimum bend radius, wherein R represents the minimum radius, WT stands for the tube wall thickness, and the constant 2 is inputted for completion. For illustration, if the steel tube wall thickness happens to be 0.5 inches, then the resulting minimum radius of the bend will be 0.5 inches.

The size of the steel tube impacts the magnitude of force needed for it to be bent. The larger the diameter, the greater the power that must be applied in order to complete the bending process. This relationship can be calculated through an equation: F=PD/4t., with F representing the force necessary for bending, P presenting the pressure used on the tube, D identifying the tube’s diameter, and t denoting its thickness. To illustrate this concept, a two-inch-wide tube with a 0.5-inch wall thickness would require 4,000 pounds of power to bend.

Bending a steel tube takes a certain amount of time, and its length can have a dramatic effect on this. For instance, by using the equation T=L/RT, which takes into account the tube length (L), bends’ radius (R) and its thickness (T), we can calculate that if a steel tube of 10 feet is to be bent to a radius of 1 foot, 10 minutes will be needed for the process.

Accurate calculations related to steel tube bending are essential for determining the needed amount of force for its bending, the minimum curvature achievable, as well as the total time consumed in executing the procedure.