MT4400矿用卡车机架轴承位修复工艺研究OA

To effectively address the challenges of large equipment size,heavy weight,and difficult coaxial alignment during the repair of MT4400 mining truck frame bearing position,this article analyzes the causes of fatigue damage in the frame bearing position and proposes a composite repair solution combining"dual dial indicator positioning+laser cladding welding+progressive turning."The article uses dual dial indicators to simultaneously measure the inner and outer suspension bearing position,aligning the machining reference center with the lathe spindle center,successfully repaires the frame bearing position through laser cladding welding and an iterative rough-finish turning process.The results show that the repaired inner cantilever bearing position diameter falls within φ930.45 0-0.5 mm,while the outer cantilever bearing position diameter is within φ928.44 0-0.5 mm,meeting dimensional tolerance requirements.Surface roughness at 10 representative points ranged from 0.87 to 3.86 μm,with an average of 2.208 μm,meeting the requirement of assembly surface roughness≤5 μm,which provides a viable solution for high-quality restoration of open-pit coal mine transportation equipment.