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我矿SQC-6-2770磁选机检修时,在起吊分选环时发现,重达2220公斤,尺寸为φ2480×325.5毫米的分选环端盖,在键槽直角处产生了裂纹(图1),端盖下端面的裂纹与键槽成45°的角度,裂纹从下端面沿键槽直角处向上延伸,纵向裂纹长203毫米,占全键槽长的80.2％。下端有两条裂纹,一条与轴孔相通,裂纹长15毫米,宽0.3毫米;另一条裂纹不与轴孔相通,裂纹长42毫米,宽1.8毫米,两条裂纹相距很近,几乎首尾相接,有报废的
I mine SQC-6-2770 magnetic separator repair, lifting the sorting ring found that weighing 2220 kg, the size of φ2480 × 325.5 mm sorting ring end caps, cracked at the right angle at the keyway (Figure 1) The crack in the lower end face of the end cap forms an angle of 45 ° with the key groove. The crack extends upwards from the lower end face at a right angle of the key groove. The longitudinal crack length is 203 mm, accounting for 80.2% of the total key groove length. The lower end of two cracks, one connected with the shaft hole, crack length 15 mm, width 0.3 mm; the other crack does not communicate with the shaft hole crack length 42 mm, width 1.8 mm, the two cracks are very close, almost end to end Is scrapped