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Butt joint is a weld of two elements located in the same plane and adjacent to one another end surface. It is most common in welded structures, because has several advantages over other types of connections. Symbols of butt joints: ci – C48. Lap-joint is a weld, which combines elements are arranged in parallel and overlap. Symbols: HI-H9. Mechanical connection – a compound in which the side surfaces of the elements adjacent to each other. Symbols in the standard yet.
Gusset lateral surface of one element is adjacent a corner scrap and welded onto the end face of another element. Typically, the angle between the elements of the line. Symbols T-joints: T1-T8. Depending on the types of welded joints distinguish butt and fillet welds. Seams of the first type operates in welding butt joints, the joints of the second kind – when welding angle, tee and nahlestoch-like compounds. The shape of the cross-section welds subdivided into standard, convex and concave.
On the number of layers of welded joints can be single-layered and layered. Layer – is part of the weld metal, which consists of one or more rollers located on the one level, the cross-sectional weld. Roller – a metal joint, weld, or remelted in a single pass. In accordance with gost 2601 – 84 basic parameters form a butt joint: e – width of joint, q – the convexity of the seam, m – weld concavity, h – depth of penetration (penetration), for fillet welds – the value of leg A '(Figure 1.11). Part of the weld, the most distant from his face, called the root of the weld.