In the era of digital transformation and Industry 4.0, Engetower has been continuously developing new technologies and processes in order to develop appropriate projects and solutions with the BIM (Building Information Modeling) concept.
Through the extensive work of a multidisciplinary team composed of engineers, designers and software developers, Engetower developed its own software, called Hefesto™, customized for the 3D modeling of structures for the T&D sector.
Modeling with Hefesto is carried out with the help of tools that automate most of the work, making the process more agile. Hefesto is integrated with the software used for the calculation and dimensioning of structures, so that, with few commands, the designer automatically inserts the parts into the model according to Engineering specifications, such as angle profiles and the quantity and diameter of appropriate screws.
The modeling procedure is analogous to the physical assembly of structures, in which each part is sequentially assembled over the previous part, using the parts themselves as a spatial reference to support the subsequent parts.
In order for the virtual model to faithfully represent the real structures, all the operations used in the design and manufacture of the parts were implemented in Hefesto, such as chamfers, cutouts, folds and flap openings, essential for the assembly of structures composed of multiple non-orthogonal planes, such as the towers typically used in transmission and distribution lines.
The characteristics of this process allow 3D modeling with Hefesto to be equivalent to a Virtual Pre-Assembly, simulating the physical assembly of structures with high reliability in a virtual environment.
The linking of information to the parts of the virtual model, a feature of BIM, makes it possible to carry out several automatic validations of the project.
Hefesto automatically checks if the project meets the criteria of the ASCE 10-15 standard, adopted by Engetower. For example, the minimum distances from holes to the edges of the parts and the minimum distances between holes are verified, in addition to the correspondence of the model with Engineering dimensioning specifications, such as profiles’ sections, diameter and number of screws.
Collision and Mountability Checks
Additionally, automatic validations are carried out for collision check and verifying the minimum distance between parts, with the aim of enabling the proper assembly of the structure.
Reduction of non-conformities
Virtual Pre-Assembly makes it possible to anticipate, in a virtual environment, the detection of non-conformities that are usually detected only in the physical pre-assembly stage of the prototype in the factory.
Experience shows that carrying out the VPA results in a reduction of more than 90% in the number of non-conformities detected in the physical pre-assembly. This reduction, added to the automatic generation of CAM files, allows for a reduction from 57 to 82% of the time spent in the stage that precedes the serial production of the structures (CAM mapping + prototype pre-assembly).
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