Study on Precision Calibration Process of Large Thin-walled Hollow Components
To address the issue of undesirable deformation in large thin-walled hollow components within the aerospace sector during continuous hot extrusion,a hydroforging precision calibration process was proposed.Focusing on single-cavity and multi-cavity aluminum alloy extrusions with axial bending defects as the research objects,the influence of key process parameters on the calibration results was initially explored through finite element simulation,and the variation relationship between different error amounts and calibration compression was determined.Subsequently,a hydroforging mold was designed based on the shape of the calibrated product,followed by a precision calibration test conducted on the hollow components.The results indicate that hollow components corrected by hydroforging exhibit high shape accuracy and comply with manufacturing standards.The study findings demonstrate that hydroforging technique can be used not only for the precision calibration of single-cavity large-size thin-walled hollow components,but also for large-size heteromorphic multi-cavities components of aluminium alloys,thereby addressing the high efficiency and precision requirements posed by the diverse array of hollow components in future manufacturing processes.
large thin-walledhollow componentsheteromorphic multi-cavitieshydro-forgingprecision calibration
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