Transactions of Materials and Heat Treatment

Title：Micro strain measurement of large high-pressure cylinders with pre-stressed steel wire winding

Authors： Li Wanzhou Cui Chenxing Bang Shaoshi Huang Luming

Unit： Tsinghua University Beijing Fengqian Automation Technology Co. Ltd.

KeyWords： pre-stressed steel wire winding high pressure cylinder micro strain measurement internet+ rubber diaphragm hydroforming machine

ClassificationCode：TP274+5

year,vol(issue):pagenumber：2019,44(3):115-121

Abstract：

Pre-stressed steel wire winding of large high-pressure cylinders is a long and slow process with minimal strain 40 με of the cylinder inner wall and minimal differential stress 10 με between adjacent winding layers, and the measurement system must have two characteristics of high precision and real-time performance. Then, the precision micro strain online measuring method was created by the internet, and the remote monitoring of the winding process was realized by analysis the micro strain process of the cylinder and setting up a strain measurement system monitored in real time and transmitted over a network. Applying the above method to the pre-stressed winding process control of the cylindrical frame for the first 770 MN rubber diaphragm hydroforming machine (abbreviated as 770) made in China, the effectiveness of the method was verified by analysis strain data. At the same time, a method of on-line monitoring the deformation of the cylinder in the production process was put forward, and the deformation data of the cylinder under 100 MPa forming pressure were collected and analyzed comparatively. Thus, a guarantee for the health diagnosis of the high-pressure cylinder was provided.

Funds：

李宛洲（1958-），男，博士，副教授，E-mail：lwz@tsinghua.edu.cn

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