Wheel lightweight machining fixture and method

A wheel lightweight machining fixture, comprising a rotating chuck, an electric cylinder, a guide rail, a slide block, a first linear motor, a first piezoelectric sensor, a first ultrasonic thickness measuring sensor, a first vertical lathe turret, a second linear motor, a clamping base for clamping the second linear motor, a second piezoelectric sensor, a second ultrasonic thickness measuring sensor, and a central hole flange turning tool for turning a central hole and a flange surface of a wheel, wherein two grooves are bilaterally distributed in the rotating chuck, the electric cylinder and the guide rail being fixedly mounted in a left groove of the two grooves, the slide block is mounted on the guide rail, an output end of the electric cylinder is connected with the slide block, the first linear motor is fixedly mounted on the slide block, the first ultrasonic thickness measuring sensor is mounted at an output end of the first linear motor, and the first piezoelectric sensor is located inside the first ultrasonic thickness measuring sensor;

• when the electric cylinder drives the slide block to move along the guide rail, the first ultrasonic thickness measuring sensor can be in contact with different positions on a spoke of the wheel, so that a spoke thicknesses at different positions can be detected.