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on Jun 12, 2014 in Business News
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Tube bending is the term used to describe the processes done with metal to permanently form them into bent pipes or tubes. There are two ways on how tubes are bent and it is dependent on their uses. Musical instruments such as trumpets and trombones are bent using manual tube bending machines and plumbing and complicated tubes are bent by automated machines.
Tube Bending Processes
Tube bending starts when the tube is clamped between a clamping block and a forming die. Mechanical force is then applied for the tube to conform to the shape of the forming die in the tubing bender. In some cases, a mandrel is placed inside the tube to maintain its cross section and prevent it from collapsing.
Types of Pipe Bending Processes
- Press Bending
- The first bending process used to bend tubes.
- The tube is pressed against a die with the shape of the bend. The tube will then conform to the shape of the die.
- This process can only makes bent tubes with one size and radius.
- Rotary Draw Bending
- This process has tooling or ‘die sets’.
- The die sets have a center line radius (CLR).
- Rotary draw benders can be programmed to make multiple and various bends. These benders make aesthetically pleasing bends because the bends are smooth and precise.
- Some examples of bent tubes made from this process are handles, handrails, frames, and car roll cages.
- Roll Bending
- In this process, rollers (usually three) apply pressure to the tube to bend it.
- This process is usually used to make pipe coils and tubes used in the truss system.
- Heat Induction
- Heat is applied on the bend point of the tube to bend it to a certain angle.
- An induction coil is used to heat the tube and pressure is then applied.