外加厚油管加厚端常見質(zhì)量缺陷及分析

Common Quality Defects of Upset End of External Upset Tubing and Relevant Analysis

摘要: 總結(jié)了外加厚油管加厚端常見表面質(zhì)量缺陷的類型，包括：外表面凸棱、結(jié)疤，端頭耳子、凹槽，內(nèi)表面環(huán)狀凹坑等；并分析了缺陷的產(chǎn)生原因。分析認(rèn)為：通過降低夾緊力可減小外加厚油管加厚端的凸棱厚度，而選取合適的鐓粗力、調(diào)整加熱溫度和時間、改善潤滑冷卻效果，可減少端頭耳子、內(nèi)表面環(huán)狀凹坑和外表面結(jié)疤等缺陷的出現(xiàn)。

Abstract: Summarized here in the paper are types of the common surface quality defects of upset end of the external upset tubing，including ridge，scar，end-fin，and pit as occurring on the pipe’s outer surface and inner surface circular pit，etc. Causes for such defects are analyzed. Accordingly，it is concluded that the ridge thickness could be reduced by means of decreasing the clamping force，and defects like end-fin，inner surface circular pit and outer surface scar，etc. could be eliminated via such measures as determining appropriate upsetting force，adjusting heating temperature and duration，and improving lubrication and cooling efficiencies.