Innovative Design of B-Axis Structure for Double-Table Turntable

To meet the demands of high-end equipment manufacturing for five-axis turntables with high precision, high stability, and fast response, this paper focuses on the structural design of the core component B-axis of a five-axis dual-table turntable. The B-axis adopts a “T-shaped layout—outer rotor direct drive—electromechanical-hydraulic integration” design scheme. By optimizing the structural layout, innovating transmission technology, and accurately selecting and verifying components, a performance breakthrough has been achieved. Finite element analysis results show that the maximum stress of the B-axis housing is 19.26 MPa, the maximum displacement is only 0.057 mm, and the strain value is 5.958 × 10⁻5, indicating that the structural strength and rigidity meet the design requirements. The selected 442sim-M832 motor enables the B-axis to reach a speed of 42 rpm, with excellent acceleration performance, and inertia and torque ratios that meet operational requirements. This design effectively solves the problems of large transmission gaps, slow response, and frequent maintenance in traditional turntables, providing reliable support for the automation and efficiency of five-axis machining.