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Application filed by Panwell Metal Co LtdfiledCriticalPanwell Metal Co Ltd
Priority to TW085109011ApriorityCriticalpatent/TW350919B/en
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Publication of TW350919BpublicationCriticalpatent/TW350919B/en
A forming and manufacturing method of a telescope tube, being the tube air cooled after being heated to 325 DEG C-375 DEG C for 2 hours a section of aluminum tubular material for regulation of the material hardness of RH25 to RH0-5 for homogenization; a half section of the tube is cut into a round tube, with the inner mold and the outer mold taking some 50% with the first section expansion hole and the second, third section of expansion hole at 25% each in three section of forged expansion hole for expansion of the calibration to a speaker hole; following a 2-stage heat treatment in the mirror tube before a further regulation, being the first section heated to 500 DEG C-540 DEG C for 2 hours before water cooling to ambient temperature and the second stage being heated to 180 DEG C-220 DEG C for 3-4 hours before air cooling for an overall hardness of RH70-73.
TW085109011A1996-07-241996-07-24Forming and manufacturing method of a telescope tube
TW350919B
(en)