BENDING TUBE

A bend die, clamp die, and pressure die are the minimum essentials for tube bending. The bend die helps to prevent the tube from flattening and forms a given radius of bend.

The clamp die holds the tube in position while bending. The pressure die forces the tube into the bend die.

Springback is excessive when a mandrel is not used. This should be considered when selecting a bend die. Springback is the term used to describe the tendency of metal that has been formed to return to its original shape. Springback will cause the tube to unbend from two to ten degrees depending on the radius of bend, and may increase the bend radius of the tube. The smaller the radiuses of bend the smaller the springback.

The tube may kink or buckle, this may be due to hard material which will not compress on the inside radius of the bend. The material, not being able to compress, pushes in toward the centerline of the tube. This condition can be corrected (provided the tube is not too hard) by proper set up of the tooling. A plug mandrel is indicated if the tube buckles and is still within the wall factor and the diameter of the bend.

The purpose of a plug mandrel is to prevent the tube from flattening and to bend without wrinkles or kinks. The mandrel is held in a fixed position while the tube is pulled over it. The tube stretching process is localized on the outer radius of the bend and the material is work hardened to retain its shape and not flatten. The material stretching is done on the forward tip of the mandrel. This force, acting on the mandrel tip, supports the inner radius of the bend, holding it firmly into the bend die groove. CNC bender is used on CNC benders from 0.25" inch to 6" inch tube bending machines.

The pressure die should be adjusted for a light pressure against the tube. The purpose of the pressure die is to keep the tube against the bend die through the duration of bending. The pressure die also keeps the mandrel from bending and maintains a straight tube between tangent points of bends (the portion of ubing left on the mandrel after steel bending). The location of the mandrel affects the amount of springback. The mandrel in a forward position (toward tangent) will stretch the material on the outside of the bend more than is necessary. This increases the length of material on the outside beyond that which is required to make a bend. When the bent tube is removed from the bend die, it will conform to the die and there will be little or no springback.

MADE EXPO – 5-8 October 2001 industry machinery

Made Expo is an international architecture and building trade show.

The third edition closes on an high note with 242,152 visitors, an increase of 21%, of whom 23,810 were foreigners (+24%).

This international event dedicated to the world of planning and building confirms its role as leader in the sector, a must-visit business appointment on the trade fair calendar and at the same time a chance for collation by operators and relaunch by the industry sector, a showcase for qualified goods with a high innovation content.

“We are completely satisfied by the result achieved”, state the organizers, “not only in terms of figures, but also and above all for the positive mood felt in the halls during the event. Over 1,700 companies took part, 254 of them from abroad, in more than 90,000 net m² of exhibition space, showing great tenacity and a desire to react to this difficult economic period. MADE expo once again proved to be an effective tool for companies, which found important business opportunities, services and in-depth analysis at the show. There was unanimous positive feedback from visitors regarding the high machine innovation and research content presented both on stands and in the cultural and technical initiatives”.

Over 180 meetings and events were on the agenda during the four days, highlighting the most relevant issues for contemporary building.

“Thanks to an innovative format that combines services and products with technology and culture”, continue the organizers, “MADE expo does not stop when the fair closes but heads towards the fourth edition, scheduled from 5 to 8 October 2011. During this period, MADE expo will continue to work, through international appointments and initiatives that will mark the months leading up to the next show. The priority for MADE expo is to support companies along the road leading to the great challenge that is EXPO 2015, which has chosen this trade fair as a benchmark for the construction system, a sector playing a lead role in development of the planet from a new perspective of sustainability for the environment and man”.

The new edition, with these conditions, will be a success. An event that was created to meet the needs of the international market, which has increasingly felt the demand of a larger trade show that allows companies to expand their commercial horizons, to make connections with international customers and search for new sales channels.

MADE expo, the landmark international event for the world of architecture and design, has responded to these needs by developing plans for a new exhibition specifically dedicated to the design world, contracting and for the interior decoration.

A showcase filled with proposals, suggestions and ideas which becomes, for the visitors of MADE expo, an opportunity to update on the latest innovations and trends. Among the last Tauringroup successes the company will present advanced technology in CNC bender.

Further insights:

http://www.madeexpo.it/en/

BENDING STEEL

The equipment used for bending is the most advanced of its kind in the world. Tooling has been developed over many years to virtually eliminate distortion of the section when bending. If there is a critical application where section integrity is important the company should be your choice of curved steel supplier.

The company is technologically advanced in all aspects from customer communication and work administration to computer controlled bending and cutting.

Capacity in each of the specialist services covers the whole range from very small sections and thin plate up to huge sections 1000 mm in size and plates up to 100 mm thick. Production system is modern and efficient. Small orders for two rings can run alongside large multi million-pound call off orders.

The company has mastered the craft of bending steel. It can produce virtually any metal component that needs to bend or curve and has an impeccable reputation in the steel bending and fabrication industry, for producing difficult and unusual parts that require bent steel, for tube bending or pipe bending machines.

This is an industry leader in structural steel bending, steel rolling and steel forming. The company works with all forms of structural steel (angle, wide flange and I-beams, channels, rectangular and square tube, and bars), as well as virtually any other ferrous and non-ferrous metals. Metal bending machine and steel forming expertise allow to produce state-of the art canopies and roof trusses, bridges, entry-ways and store fronts, stadiums and parking garages.

In addition to structural steel bending, our tube bending machines and pipe bending capabilities range from the very small to the very large. Pipe bends and metal tube bends can be found in the form of modern art sculptures, pedestrian bridges, exercise equipment, furniture, playground equipment, bike racks and bollards, and much more.

This is an industry leader in spiral, circular and helical bending, that has the ability to produce steel and metal spiral stringers and staircases. Other ornamental applications include custom handrails, decorative gates and fences, and unique signage.

Other bent steel applications include parts supplied to light and heavy industrial customers. Products include boiler tubes, heat exchangers, coils, pipe sections and tanks, pipe spools, hydraulic lines, solar panels, chip lines and much more. In addition, the company serves the marine, locomotive, aviation, automobile, agricultural, and medical and dental industries with unique, high quality parts that require metal rolling or bent steel.

To the most common forms of structural steel, the company also bends other miscellaneous material types, like architectural rail cap, railroad iron, rounds bars, square bars, etc.

PIPE BENDING MACHINE

The range of pipe bending machines and accessories represent the best of engineering, manufacture and innovation. For many years there has been very little real choice of stand mounted conduit or copper pipe bender but this new range, featuring some much needed new ease of use features and unique accessories carries on the company tradition of innovation and continual product improvement whilst providing superb value for money. Bending machine is fabricated from 30mm square section tubing to provide a rock solid frame which more than stands up to the rigors of daily use. The frame is designed to give maximum stability, minimizing the risks of sideways movement or skidding across floors, making operation as easy and effective as possible. The formers, which are key to creating a perfect bend, are machined cast aluminum. This means they can provide a superior and highly accurate bend as the machined area provides a perfect profile to support the pipe and gives excellent contact and virtually no movement. By comparison, most other brands use non machined die casts. Included with all machines is a dual purpose stabilizing and extension bar. It can be used to give extra leverage when performing down-bends, or to give extra stability to up-bends by acting as a counter-lever. For electricians, the bar can also be used as a handy cable reel feed by simply securing it through holes in the vice mount, further adding to its versatility. When not in use the bar can be stored securely out of the way on the side of the machine. Another important development on this range of machines is the new design vice mount. Being more substantial than those of other brands, this vice mount offers added functionality. Perhaps most important is the ability of the company mount to accept a wide range of vices, including those of other leading manufacturers, thanks to the universal slots. These slots are also designed to allow the vice to be secured either flush with the edge of the mount or even to overhang, in order to provide clearance to make the threading of conduit much easier, no longer making the vice mount an obstacle to the threading equipment.

Yet another exclusive feature in this range comes in the form of the hexagonal drive featured on the universal and pipe bending machines. Using the optional hexagonal drive key, a power drill can be used to wind the inner shaft of the bending lever handle to quickly and effortlessly move the roller into position.

CNC BENDER

The CNC bender can handle a wide variety of tube pipe sizes. This machine has a wide variety of applications, from consumer electronics and various tube/pipework used in ultracompact equipment to the largest machines found in plants, shipping, and nuclear power plants.
CNC Tube Bending adds a new level of speed and precision. The impact of CNC Bending increases as the complexity of the tubular part increases. CNC equipment automatically manipulates the tube in order to precisely position the various bends relative to each other. CNC Tube Bending is usually employed when a part contains more than two bends. Although it is suggested that all of the bends in a part are designed around the same bend radius, the CNC equipment has additional capabilities that allows mixing of bend radii in the same part.
Pipe bender has a wide range of optional software's and functional accessories, having total powers from designing manufacture of hardware/controller to molding dies.
Features in particular:
• Stable accuracy with durability
The mechanism is employed in benders for bending torque transmission, whilst chain-driving mechanism is standard to those of other brands which is doomed to tension looseness as the service is provided.
Mechanism is:
DOB motion stays free from hunting, and longer accuracy performance secured.
Reduced bending head size squeezes out larger bending space for 3D bending of complicated design.
• High machining accuracy
Thanks to the employment of "double-closed " servo driving system controlled by designed sophisticated micro computer LSI, mechanical behavior of positioning is very reliable and stable to maintain accuracy motion regardless of the level of hydraulic temperature, motion speed and backlash. Accuracy-check sequence is also implemented to monitor and apply necessary verification at every bending process all for stable quality bending.
Sturdy steel construction and precise computer controls give CNC bender the ability to create quality bends every time, even when your bending application requires complex or tight-radius bends.

The CNC Tube Benders equipment is capable of manipulating tube and pipe accurately and repeatable from small to large quantity runs.
One of the great benefits being your jobs program is kept on file in the machine so your next order is exactly the same as previously supplied.
It’s a semi- automated system to load and unload tube variants into and from the CNC bending machine.
The tubes are manually loaded into the tube carrier on the transfer chain at the load area. The transfer chain is indexed forward by the indexing cylinder sprocket until the tube is sensed in the unload position.
A pair of pneumatic rotating grippers are used to present the tube to the CNC bending machine. Upon cycle complete a second pair of grippers remove the tube and release it into a collection container.

BENDING MACHINES AND ANGLE ROLLS

Bending machine is versatile, it is easy to operate and is well suited for bending pipe, tube, aluminum extrusions and other sections.

Standard features include double pinch hydraulic forming rolls, hardened precision threaded shafts, and dual adjustable lateral guides.

The design is the result of years of experience and is aimed at providing the highest level of performance, accuracy and consistency throughout the life of the bending machine with the additional advantage of being virtually maintenance free.

The lateral guide rolls are hydraulically powered and can be adjusted to work very closely to the bending rolls, minimizing the distortion of non-symmetrical profiles. Moreover, the guide rolls are equipped with the tooling to bend angle leg-in.

Angle rolls machines are used for bending tube, angle, or shapes into coils, circles or large arcs using a wide variety of materials. By simply adjusting the third roll you change the size of the arc or circle. Tube bending sizes require specific rolls. There are rolls for any application including CNC bender controlled.

Profile rolls often called angle rolls. We used the same technology as our 3 and 4 roll plate bending rolls which results in a stronger and higher quality machine than most other manufacturers but still at a very competitive price.

The rolls can bend almost every profile and section in steel, stainless and aluminum and are virtually maintenance-free.

The components are:

• Heavy steel manufactured frame, machined on CNC machining centers for the best accuracy
• 3 direct driven rolls, with hydraulic planetary motor to eliminate gear boxes, connecting arms synchro devices and clutches
• 2 forming rolls for reduction of flat ends
• double roll spherical bearings SFK or equal = maintenance-free and maximum rigidity
• hydraulic motors attached directly to each planetary drive, eliminating the loss of torque
• Modular tooling which can be configured to roll most standard sections. Special tooling can be ordered for rolling pipe, tubing or channels the hard way.