When making a building, engineers perform plenty of give-and-take with regards to costs. They can choose a thinner wall thickness for HSS, saving on material, but cope with an added cost of additional through-plates or other connectors to ensure the structure has sufficient strength. Or they may choose thicker-walled HSS to make sure connections between structural members meet requirements. Architectural engineers may require connections between HSS, or connect HSS to wide-flange beams. It’s a continual balancing act.
This balancing act can be easier-and here is where hollow section steel tube can really shine. The equipment effectively makes complex geometries at HSS end sections cost-effective to fabricate. Six-axis laser cutting heads create complex bevels as well as tab-and-slot arrangements to simplify fit-up. Including tilting back and forth (moving across the A/B axis), which is often extremely beneficial not merely for HSS, however for cutting various structural geometries, including wide-flange beams. By tilting, the top can cut geometries in corners, eliminating secondary operations.
This tilting allows for cutting angles for bevels along with precise fit-up between two HSS of different diameters. What if you want one tube to slide in with an angle with another tube? A 3-D cutting head can cut the essential angles to guarantee complete surface contact; that may be, no gap in between the two workpieces. Systems likewise have secondary tapping units to tap holes inside the laser cutting work envelope (see Figures 3-7).
This done-in-one concept reduces handling and total production time, at least that’s the best. But this is way more complicated than a tube cutoff operation by using a saw, and quite different from typical light-gauge laser cutting; again, stick weight could be 1000s of pounds. This makes proper planning and inspection even more important.
It starts off with the 3-D CAD model, which within the architectural world is normally integrated into BIM, or building information modeling. The architectural industry also transfers data via files formatted as Industry Foundation Classes (IFC), a physical object-based building model format created by the International Alliance for Interoperability (IAI). Such files now can be imported directly into machine tool software.
The software program shows the way the laser cutting machine will process the hollow steel pipe, simulating the complete work cycle. Including the loading automation, when several V arms position a fresh component of material, be it round, rectangular, or square. The simulation then shows the master chuck grabbing into the material and pushing it through another chuck (the slave chuck) and to the laser work envelope.
Since the material moves into position, the software reveals exactly where the probe will contact the workpiece. Touch sensing might be critical with heavy HSS. The probe compares the exact workpiece geometry for the one programmed from the machine. As an example, the longitudinal weld within a tube production process can make distortion in extremely long HSS, and the touch probe can are the cause of that distortion.
The program simulates the laser cutting and (as needed) tapping work cycle, ensuring you will find no interferences involving the processing heads and workpiece. It simulates chuck movement through the entire cycle and then shows just how the machine will unload the finished workpiece and remnant.
This is planned before anything moves to the shop floor. This sort of simulation will manage to benefit various fabrication processes, needless to say, however it becomes a lot more important when confronted with large sections. Moving and fabricating bad components from the 2,000-lb. tube represents plenty of wasted time and cash.
When you consider the length of time wide-flange beams have been utilized, HSS remain newcomers, however right now more builders are calling for these people. Take a look at various building designs today, and you’ll see HSS more and more prevalent, either dominant in a building’s design or providing efficient support between wide-flange beams.
In the fabrication side, most beams being shipped to construction sites are processed through beam lines, and some of the latest technologies in this arena include elements of the done-in-one concept: seamless steel pipe, tapping, drilling, and a lot more, multi functional machine. This idea has carried up to the laser cutting arena, in dexopky12 both workpiece and multiaxis cutting heads relocate concert to make extremely complex geometries, many believed to be too expensive or simply just impossible a little while ago.
Now the laser makes these possible and expense-effective, because process simulation, touch probing, along with the done-in-one concept reduce overall fabrication time. As soon as these heavy sections make it to the work site, erectors can assemble them quickly, shortening overall construction time-which, from the scheme of things, provides the most dramatic influence on construction costs. It has been core to the prosperity of many architectural and structural fabricators recently: Do more inside the controllable environment in the fabrication shop to help make things easier inside the relatively uncontrollable environment of the construction site.