honing is a process for finishing surfaces to obtain smooth surface. this process is used for finalpolish of inner parts such as engines cylinders. optimizing this process has always been a bigchallenge for mass production of cylinder blocks of internal combustion engines. honing processhas some variable parameters, thus to get their optimum rates the automobile cylinders were tested.in this re...

Identification of soil condition at the working face a tunnel boring machine (TBM) is key factor for efficiency and safety TBM tunneling. The paper presents first application Horizontal-to-Vertical Spectral Ratio (HVSR) method on microtremors induced by during tunnelling. innovative based development an easy-to-use economical early-warning system, which aims to confirm, or otherwise, profile es...

A frequent problem when constructing metro tunnels is the uneven settlement of adjacent buildings, which results in huge economic losses. Due to shields causing this study took Nantong Metro Line 1 as research object. The runs from East Huancheng Road Station Intermediate People’s Court and passes under old residential area Community Sendadi-Huayuan building. Based on monitoring data, analyzed ...

Chatter is a concern in boring process, due to the low dynamic stiffness of long cantilever boring bars. Chatter suppression in machining permits higher productivity and better surface finishes. The MR fluid, which changes stiffness and undergoes a phase transformation when subjected to an external magnetic field, is applied to adjust the stiffness of the boring bar and suppress chatter. The st...

Cephalometric analysis of lateral radiographs of the head is an important diagnosis tool in orthodontics. Based on physically locating specific landmarks, it is a boring, lengthy and error prone task. The objective of this work is to calculate the SNA angle, SNB angle and ANB angle between the landmarks to identify the input and output parameters pertaining to skeletal abnormalities. By doing s...

Abstract Field penetration index (FPI) is a representative key indicator for tunnel boring machine (TBM) performance estimation, however its application in real tunneling projects still limited because of the lack some theoretical knowledge on relationships between FPI, rock mass properties, and TBM specifications. This study aims to establish FPI model by analyzing tool–rock interaction disc c...