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四立方米正铲挖掘机回转轨道是在低速重载下工作,其直径为φ2900毫米,轨面宽度75毫米,材质40Cr。我单位两台挖掘机工作不到四年轨面出现10厘米以上的大块剥离,又有严重被挤出现象,使轨道高度严重降低,以致回转盘上的蜗轮减速箱与底盘相碰,不能工作。因现场条件差,在迫不得已的情况下,我们采用普通焊条结507堆焊轨面,用气割枪切除被挤出和堆焊的毛边,然后轨面用自制的装在挖掘机底盘(或回转盘)中心轴孔上的铣削架按设计轨道高度铣平(见附图)。然后将轨道在耐火砖砌的环形地炉内加热,以木炭为燃
Four cubic meters shovel excavator rotary orbit is working under low speed heavy load, the diameter of φ2900 mm, rail width of 75 mm, material 40Cr. I unit two excavators work less than four years rail surface appears more than 10 cm large peel, but also a serious extrusion phenomenon, the track height is seriously reduced, so that the turntable worm gear box and the chassis collide, can not jobs. Due to poor site conditions, the last resort, we use ordinary welding knot 507 welding rail surface, cut with gas gun was squeezed out and surfacing of the flash, and then rail surface with homemade excavator mounted chassis (or turntable ) The milling carriage on the center hole is milled to the desired track height (see photo). Then the track is heated in a refractory brick ring furnace to charcoal