VERTICAL compression tube benders have been around for more than 50 years (see Figure 1). Historically associated with high-volume bending, these benders continue to play a role in production environments where parts have just one or two bends. Also known as press benders, they have stood the test of time mainly because of their speed and bend consistency. Depending on the application, a press bender can produce 900 bends per hour. Bend quality is influenced mainly by the die setup. On a press bender, a ram die (punch) pushes through a bend, while two wing dies provide resistance, or cushion (see Figure 2). In addition to providing resistance, the wing dies keep the tube inside the punch die as it progresses through the bend.
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