Abstract Vibro-impact drilling has shown huge potential of delivering better rate penetration, improved tools lifespan and borehole stability. However, being resonantly instigated, the technique requires a continuous quantitative characterisation drill-bit encountered rock materials in order to maintain optimal performance. The present paper introduces non-conventional method for downhole using...

The evolution of tool-machines shows a trend for integration of different machining functionalities such as, milling, turning, and drilling, on a same machine. These machines are result of the mechatronics development that allows the aggregation of different functionalities into a unique machine (named multifunctional machine tool MMT). However from the point of view of the production process t...

recently, incremental sheet metal forming (ismf) process as one of the new methods in rapid prototyping collection has been considered by researchers. this process is based on a defined path in cnc controller and applies a spherical-head tool that supplies the required pressure for sheet metal forming. despite affirmation of process ability in forming symmetric geometries, some of its aspects s...