A truss is a lattice structure composed of interconnected members at their ends. A tubular truss is a structure where all members are circular tubular members. In most cases, truss members are only subjected to axial tension or compression, with stress evenly distributed across the cross-section. This allows for efficient material utilization, resulting in economical material usage and low structural weight. Truss structures are easily configured into various shapes to suit different applications, such as simple trusses, arches, frames, and towers. Consequently, truss structures are widely used in many large-span venues, such as convention centers, stadiums, and other large public buildings.
Most truss structures use welding connections at the joints. Before welding, the web members and chords must be pre-cut according to the weld shape of each member to be welded. This requires intersecting line cutting of the web member ends and slotting of the chord members. Since the members in a truss structure intersect each other in the form of intersecting lines, and the cross-sectional shape of the member ends is relatively complex, two methods are generally used in actual cutting and processing: automatic mechanical cutting and manual cutting.