Tube bending dies download#
The pressure die forces the tube into the bend die.Ĭlick here or follow the link below to download a free introduction to tube forming to read more, or contact us at any time with any questions or comments you may have. 2 Figure 1 The clamp die holds the tube in position while bending. The bend die helps to prevent the tube from flattening and forms a given radius of bend.
The forces acting on the tube also becomes greater as the radius of the bend becomes smaller.īend dies, clamp dies, and pressure dies are the minimum essentials for bending tube and tube forming. If the wall thickness of the tube is decreased, it also becomes weaker. As the size of the tube diameter is increased during tube bending, the tube becomes weaker. Little or no support is needed within the tube when the tube diameter is small and the wall is thick. Have questions about mandrel bending? Get your free Intro to Tube Bending and learn about the importance of a mandrel to avoiding common bending issues!
Two factors that help prevent this from happening are a grooved bend die, which supports the tube along the centerline and the natural strength of the tube round or square (Figure 2). The outside and inside of the bend tend to pull towards the centerline of the tube (flattening). Excessive flattening or wrinkling of the bend during tube forming should not occur. When the ratio of the tube diameter to wall thickness is small enough, the tube can be bent on a relatively small radius (Centerline Radius or CLR = 4 x Tube O.D.). The material that forms the outside of the bend has further to travel and therefore is stretched the inside of the bend has less distance to travel and is compressed. The material actually is formed approximately about the centerline of the tube. The outside wall is reduced in thickness due to the stretching of the material and the inside wall becomes thicker due to the compressing of the material (Figure 1). When a tube is bent, two things happen to metal.
Training Solutions for Tube Forming Industry.The pressure die (also called a pressure slide) supports the outside radius during bending. Other critical dimensions are the wall thickness (which thickens on the inside radius and thins on the outside radius) and outside diameter. All Electric Left And Right Tube Benders A bend angle in tube bending usually is calculated from the outsidethe complementary bend angle.