The invention discloses an automatic
welding device and method for an automobile rear axle housing. The
welding device is characterized in that a rotary clamping mechanism comprises an oblique wedge,an oblique
wedge base, first ejection pins and second ejection pins, the first ejection pins are arranged in first sliding grooves of the oblique
wedge base in a symmetrical 180-degree mode, the second ejection pins are arranged in second sliding grooves of the oblique
wedge base in a symmetrical 180-degree mode, an 90-degree angle is formed between the first sliding grooves and the second slidinggrooves, the oblique wedge is matched with the first ends of the first ejection pins and the first ends of the second ejection pins, and jacking discs are horizontally arranged at the two ends of theupper portion of a rotary clamping mechanism. The
welding method comprises the steps of axle housing cover and reinforcing ring
spot welding after positioning, horizontal ring welding
seam welding and vertical ring welding
seam welding. According to the automatic welding device and method for the automobile rear axle housing, welding of six welding seams is achieved on one device, therefore, theequipment occupation area is decreased, and the equipment cost is reduced; the intermediate part carrying process is omitted, and the welding efficiency can be greatly improved; and a welding gun onlyneeds to have a telescopic function and does not need to conduct welding seam tracing, and the automatic welding device has the
advantage of being simple in structure.