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无缝三通是应用在石油 化工等行业的一种常用管件,从1984年起,大批量生产无缝三通采用了先进的液压胀形工艺,本文就该工艺对无缝三通的成形过程中所产生的产品缺陷进行分析,且提出预防方法。 (1)背部皱折,见图(a)。其产生原因;有管段表面不光洁,有锈、漆等;初压时压力低或成型中保压不好;管段流动速度大于内压增压速度;润滑不良。预防方法:对管段表面进行处理;提高初压,并在成型过程中稳定内压;调整液压机运动速度和内压上升速度;采用适宜的润滑剂。
Seamless tee is used in the petrochemical industry, a commonly used pipe fittings, since 1984, mass production of seamless tee using advanced hydraulic bulging process, this article on the process of seamless tee forming process In the product defects produced by the analysis, and put forward prevention methods. (1) back wrinkles, see Figure (a). Its causes; there is pipe surface is not clean, rust, lacquer, etc .; initial pressure low pressure or poor pressure in the molding; pipe flow velocity greater than the internal pressure booster speed; poor lubrication. Prevention methods: the pipe surface treatment; improve the initial pressure, and the pressure in the process of forming a stable internal pressure; adjust the hydraulic machine speed and pressure rise rate; the use of suitable lubricants.