The invention provides an optimization preparation method of an LF2
aviation guide
pipe. The optimization preparation method comprises the following steps of heating, extruding, puling and correcting,
etching, rolling,
diameter reducing annealing, drawing, straightening, cleaning, detection and finished product annealing for a hollow
ingot are carried out in sequence, so that an aluminum
alloy conduit is obtained. According to the method, the
cutting inclination, the wall thickness difference and the curvature degree of the hollow
ingot are specifically controlled, so that the prepared conduithas good dimensional accuracy; the aluminum
alloy conduit is prepared by adopting a non-lubricating
extrusion process under the specific perforation needle length, and the aluminum
alloy conduit withgood inner surface quality is obtained under the condition that the perforating needle is not damaged in the
extrusion process; a high-temperature short-time and rapid
heating cooling annealing process is adopted, so that a guide
pipe with a small surface grain size is obtained, and the phenomenon that the aluminum alloy generates "orange peel" in the follow-up bending process is avoided. According to the optimization preparation method, the LF2
aviation guide
pipe with good quality is prepared under the comprehensive action of various processes.