TPT November 2013

2013

Medium and large diameter fully electric bending machines

the customisable die holder flange in the area where the equipment is mounted. The one-block bend arm is built by building in the clamp-blocking axle with the benefit of rigidity and precision, as well as the possibility of bending tubes with very small pipe radius; knife-shaped tube cutting device which can be built on the machines for sequential cutting operations in the same manufacturing cycle. With dramatic reductions in process scrap achievable; possibility of integrating the machinery with “tangent boost”, a device that limits the swerve on the last curve of any bent tube, with considerable material saving. Bending machines that can be fully programmable with the use of the graphic interfacing Software “UII” developed by Crippa, which ensures the possibility of carrying out accurate feasibility analysis and accurately simulating the bending; thus ensuring a fast manufacturing stage and successful manufacturing from the first sampling. The fine-tuning of program steps can be achieved by optimising the program generated by a graphic simulator through ISO code processing; the number of working planes is variable according to the geometry of the tube to be bent and any different bending radii; guarantee of bending with a very high diameter/width ratio and a very small bending radius; possibility of bending with variable radius; ease of tube loading and unloading either in manual or automatic mode, thanks to a very ergonomic loading area; right or left bending sense; and high repeatability and precision but also reliability thanks to the use of electrical/electronic components and devices, which are currently some of the best on the market. The new technology is suitable for many applications, especially for those who operate in automotive (lorries and earth movement), railway, aviation and plant design and for people who have to face hard bends on large diameter tubes, narrow and often small bending radius.

FOR many years the market has been requesting Crippa to supply machinery and solutions in the field of large- sized tubes (between 100 and 150mm diameter). However, despite having several projects in the drawer that have been kept in continuous progress and updated at the pace of technology progress and daily experience in the field, the company has always preferred to focus its offering on lower sized machinery in diameters up to 80mm. After completing the “full electric” offering in diameters up to 80mm, Crippa has entered into the large diameter field with an innovative fully electric machinery platform, which uses the entire experience from Crippa that was acquired across over 60 years of activity, and meets customers’ needs and market trends. The mission is to reaffirm the Crippa role as the preeminent field reference in large diameter tube manipulation. The fully electric offering for large diameters was developed through machinery that is built based on specific objectives and issues, such as conceptual and operating simplicity, full structural rigidity, flexibility, sustainability considered as energy saving, ergonomics, ecology, and using state- of-the-art technology, and characterised by the greatest operating flexibility and the widest possibility of customisation, tailor made according to users’ needs. There are two new models of these

An example of a Crippa bend

bending machines, the CA N114 and the CA N150. Some main characteristics and functions include: tube-bending machines for tubes to 114 and 150mm diameter; the concept of these bending machines is to reach the utmost structural rigidity on several tube-bending planes, combined with construction simplicity and the use, where possible, of direct control transmission. Wide use of digital “full electric” axes, being activated and controlled by servo motors and Siemens CNC, which compared with hydraulic machinery, ensures higher precision, repetitiveness and ecological characteristics such as energy saving, silence and cleanliness; the use of state-of-the-art electronic devices ensures the minimising of the electrical power used during manufacturing with a considerable economic saving over time.

Bending of up to 150mm can now be undertaken

The time schedules for changing tooling and pro- gramming are minimised as no mechanical adjust- ments are required. The roller bearing guides for mounting and scrolling of equipment promote the precise posi- tioning and controllability of all axes. Existing tooling sets owned by customers may be used, thanks to the high vertical Z-axis excursion and particular mechanical solutions, eg

Crippa – Italy Email: carlo.fratini@crippa.it Website: www.crippa.it

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N ovember 2013