Abstract
The research and development of small-invasive sampling machine (SISM), which can be used to take out small dimensional samples from in-service equipment and to provide experimental materials for hydraulic bulging test and small punch test, has important application value in Engineering practice. This paper proposed a SISM and its design considerations. The sampling trajectory plan and small dimensional sample arrangement for improving sampling material utilization have been described. A unique semispherical machine tool was designed and the preparation method and performance characterization of the tool blade coating was studied. The tool rotary cutting motion and rotary feed motion were planned. A swing-level-type centering mechanism was designed as feeding mechanism. Samples of form of spherical crown with diameter 35mm and thickness 4mm can be take down from in-service equipment.
Highlights
People usually have an urgent need to know clearly about the service status as well as the reliability, residual life and safety status of the special equipment, especially such as the power station equipment, process equipment and pipelines and chemical devices
The research and development of small-invasive sampling machine (SISM), which can be used to take out small dimensional samples from in-service equipment and to provide experimental materials for hydraulic bulging test and small punch test, has important application value in Engineering practice
This paper proposed a SISM and its design considerations
Summary
People usually have an urgent need to know clearly about the service status as well as the reliability, residual life and safety status of the special equipment, especially such as the power station equipment, process equipment and pipelines and chemical devices It has important theoretical significance, engineering value and social benefit to monitor and evaluate the status of the equipment in service. People developed the small punch test technique and hydraulic bulging technique in order to evaluate the material properties of the in-service equipment. In this way, 15~35 micro specimens can be made from the removed tiny material
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