The steering knuckle is a chassis safety component with complex materials and structures. The machining of its bearing holes and mounting surfaces involves multiple milling and boring processes, requiring the cutting tools to have good rigidity and wear resistance. Hard alloy reversible cutting tools have outstanding economy in this type of multi process machining.
The control arm and subframe are mostly forged aluminum or stamped steel plate welded parts, and the machining accuracy of the connecting holes directly affects the suspension positioning. PCD drill bits and reamers can achieve long service life and stable accuracy in large-scale aluminum alloy control arm machining.
The hub bearing seat is made of high-strength steel, and CBN cutting tools are recommended for hard turning of the outer ring and inner hole, which can achieve a surface quality of Ra<0.2 μ m and meet the requirements of bearing pressure distribution and rotation accuracy.