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Tube and pipe benders are used to bend pipes and tubes to produce finished parts. Pipes are structural, hollow pipes that are used as flow lines for liquids and gases in pneumatic, hydraulic, medical and process applications. Pipes are measured based on their outside diameter and are usually smaller and less rigid than pipes. Pipes are vessels used in fluid and solid transport systems. They usually have a larger diameter and are measured with an inside diameter regardless of the wall thickness. Pipe bending and production equipment is used to perform operations such as bending, shaping, expansion and milling.
There are many types of pipe and tube benders, each working differently. As described below, the operation of each machine depends on several features.
Computer controlled bending machines (CNC) produce narrow radius arcs, large radius arches and elliptical arches - all in the same part. These are advanced machines that guarantee a high level of efficiency and repeatability. CNC bending machines are used to create complex pipe parts, because they can automatically manipulate the pipe and precisely position it. They consist of three axles and a servo driven trolley that automatically sets the distance between turns and the plane.
CNC bending machines do not contain hydraulic or pneumatic functions, which leads to greater repeatability and operation. These machines are useful in many industries, including the automotive, HVAC, shipbuilding and railways. There are three types of CNC axis benders.
Vector pipe bending machines are available in various models and are designed for automatic pipe production. They come in various sizes, axis speeds and acceleration and deceleration controls. Advanced models do not use chains. These machines can be used for high-strength pipes in aircraft and car exhaust pipes.
Vector Bend electric pipe benders are the most advanced and provide high performance, quality and reliability. Electric machine operation saves more energy than conventional hydraulic pipe benders. These machines are able to reverse the rotation of the bending head, providing operators with flexibility during complex bending applications. These machines are equipped with an advanced user interface with a touch screen for programming and performance monitoring.
Orbital head benders offer considerable flexibility and can be used for complex CNC tube bending. These machines effortlessly produce tubular parts with coils, couplings and hoses, and can also be easily integrated with automatic loading and unloading equipment. They are used to control the computer on a high resolution touch screen. The advanced features of these machines help to simultaneously rotate the head and sleeves around the parts, which shortens the cycle time and guarantees optimal performance. The machines are ideal for air conditioning, automotive, trucks and other complex applications.
Hydroforming devices use fluid pressure to form ferrous or non-ferrous matrix-shaped materials. The machine components consist of a hydraulic hydroforming press, pressure boosters, a hydroforming water system and a hydroforming unit. The press opens and closes the spilled mold cavity, allowing insertion of the empty part and removal of the finished product. The pump provides internal pressure, and piston cylinders seal the ends of the tube, retaining pressure for deformation. The benefits of using this process include weight saving, part reduction, and increased design options. Hydroforming can create unique geometry in one process.
Piston benders and pressure benders place the pipe or pipe in the die. The pipe or pipe is held at both ends and the slide moves on the central axis to bend the pipe. The pipe or pipe is deformed inside and outside the curvature.Depending on the thickness of the pipe or tube material, this process will deform the tube or pipe into an oval shape. This is the easiest and cheapest bending process. Frame bending is best used for electrical wires and similar products of small thickness.
Heat bending equipment places an induction coil around a pipe or pipe and applies a bending force when an object passes through a heated coil.
Sand packing machines or hot benders fill the pipe with sand, cover the ends and heat. The pipe is bent around pins using mechanical force. This process minimizes deformation in the pipe cross section.
Mandrel benders or rotary benders insert a mandrel, a stationary anti-bending matrix, into a tube or pipe during bending, so that the shape and diameter are maintained and the knees are not deformed. The mandrel supports the pipe internally and ensures that the internal curvature of the pipe is the best possible bend and is not deformed. This is the most common bending process. The mandrel bend retains a good finish and is best suited for handrails, iron decorative elements, exhaust pipes, roller cages and all stainless steel and aluminum pipes.
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