Research on non-destructive clamping and precise posture adjustment of thermal protection barrels

In view of the problems such as cumbersome manual posture adjustment and easy surface damage of the thermal protective layer parts based on aerogel in the machining process, combined with the material properties of the thermal protective layer of aerogel, a scheme design for lossless clamp and automatic posture adjustment was proposed, the non-destructive clamping of the workpiece was realized through a flexible vacuum adsorption device, the six-degree-of-freedom posture adjustment of the workpiece was realized through four three-coordinate positioners. Based on the fast pose algorithm, combined with the error weight distribution method, the Levenberg-Marquard algorithm was used to correct the posture adjustment parameters with errors to obtain more accurate target posture parameters. The simulation results show that the error of posture adjustment parameters after correction is reduced by 50%～90%. Finally, the experiments verify that the position error of the workpiece posture adjustment parameters is less than 0.6 mm and the attitude error is less than 0.25° after correction, and the device performance meets the current process requirements, which can effectively improve the production efficiency of composite material machining with aerogel as matrix.