Welding axle shell three-face multi-shaft drilling clamp, machine tool and drilling method

The invention discloses a welding axle housing three-face multi-shaft drilling clamp, a machine tool and a drilling method, firstly, concentric positioning of an axle housing middle hole is carried out, a hydraulic rod of a first oil cylinder is used for pushing centering guide columns to synchronously move in the radial direction of a spring seat, in order to guarantee uniform stress, the number and the distribution mode of the centering guide columns can be adjusted, and the centering guide columns can be driven to move synchronously in the radial direction of the spring seat; enough supporting force is provided; then the inner wall of the middle hole is compressed through a compressing mechanism, the freedom degree of the axle housing is further limited, the reliability and accuracy of positioning are guaranteed, and deviation cannot occur in the drilling process; according to the side positioning clamp, the rotational freedom degree of the axle housing is limited through an elastic pressing mechanism, the