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货车底架鱼腹梁(亦称中梁)是用长度为13960毫米的№55或60号工字钢制成的等强度梁(图1).梁的高度变化是用气割嘴在工字钢腹板上切去长为4500毫米及高245毫米的楔形板的方法来达到.楔形板切除处的水平下翼缘,在装有风动卡具的专用工作台上折弯.在此工作台上用自动焊机完成封底焊缝.在个别情况下,梁的规定高度是以对接处的间隙来调整.因此,在弯曲处往往形成较大的间隙,这样大的间隙用单弧自动焊是很难焊成正常的封底焊缝.所以该焊缝过去是用手工焊接的.
Truck chassis Fishbone (also known as the middle beam) is the equal strength beam (Figure 1) made of №55 or 60 I-beam with a length of 13960mm The height of the beam changes with the gas cutting nozzle in the I-beam The web was cut by a wedge plate measuring 4500 mm in length and 245 mm in height to achieve a horizontal flange at the cut-out of the wedge plate, which was bent on a special workbench with pneumatic clamps, On the individual cases, the height of the beam is adjusted by the gap at the butt joint. Therefore, a large gap is often formed at the bend, so that a large gap is automatically welded with a single arc It is difficult to weld into a normal backseat weld, so the weld was hand-welded in the past.