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Clamp die meets the bend die and moves simultaneously as it is used for clamping the workpiece. Bend die is the main tool which directs the tube along the rotation axis. īending tools for Rotary Draw Bending (Figure 2) were designed during this project. The method is similar to the ram bending method, but the working cylinder and the two stationary counter-rollers rotate, thus forming the bend. The tube cannot be supported from within therefore this method is suitable for thick-walled tubes and large bending radius only.ģ-roll bending is also used for producing work pieces with large bending radii. This motion forces the tube inserted between the radius block and the counter-rollers to bend around the radius. When ram bending is applied, bending tool is pressed against two counter-rollers, either manually or by means of hydraulics. The sliding carriage, which rotates around the radius block, bends the tube to the radius of the bend die.

This bending method is carried out with a sliding carriage and a stationary bend die, between which the tube is clamped. If a mandrel and wiper die are additionally applied (mandrel bending), a high quality work piece can be achieved even with thin-walled pipes and tight bending radius.Ĭompression bending is similar to rotary draw bending. The pressure die (slide piece) serves the purpose of receiving the radial stress, which is generated during the forming process, and supports the straight tube end from outside. The rotation of both tools around the bending axis bends the tube to the radius of the bend die. When rotary draw bending is applied, the tube is fastened between the bend die and the clamp die. The more common procedures are rotary draw bending, 3-roll bending, compression bending and ram bending (press bending) (Figure 1). Various methods are used for bending tubes depending on the material in use and the required precision. This process works on metal, alloy, aluminum, titanium, and steel. Tube bending is a process used to reshape tubing or piping into a certain shape or design.