rentauf.blogg.se - Tube bending wrinkle chart

4Adjust the pressure-die assist setting as needed.

It’s a matter of using a four-step procedure that precisely positions the tooling: You can maximize all three of these objectives with a little time and effort. It is not necessary to sacrifice tool life or process control for better bend quality. This results in a trade-off: The tube is in the desired shape, but high pressure at the point of bend decreases tool life, process control, or both. Because this approach works against the axial tension on the tube, it requires increased machine pressure to force the part into shape. This over-reliance on the machine’s controls “squeezes” the tube into the desired shape through use of excessive radial force at the point of bend.

Many operators use these controls to overcome the limitations of poor setup practices on routine applications. Many controls on CNC bending machines were devised to make difficult applications practical. Modern features on tube benders, especially pressure-die assist, permit many operators to obtain adequate results without mastering tooling setup. Many tube bending machine operators rely on machine features more than they should. In rotary draw bending, four simple setup steps, executed precisely and in the correct order, will help you maximize bend quality, tool life, and process control. No one is a fan of excessive scrap.Įven though we are in the age of CNC machinery, the old phrase “the tools make the bend” is as relevant today as ever.Īs tube bending applications have become more extreme (see Figure 1), tooling design, setup, and maintenance have returned to a position of central importance. This is particularly true with challenging applications involving expensive material. Even using the latest CNC technology, you need to understand how tooling and its placement can help to deliver repeatable, high-quality bends.