Improving the surface quality of additive manufactured parts like poly lactic acid (+) is an important study that currently being carried out by researchers. To reach high-quality, different conventional and nonconventional methods are applied. In this study, capability ultrasonic vibration in drilling (+)was examined. The process was implemented two methods: vibratory drilling. Then, thrust fo...

An investigation is made into the effects of liquid carbon dioxide (LCO2) cooling, minimum-quantity lubrication (MQL) and cutting speed in drilling. Experimental measurements torque, thrust force temperature are over a wide range process operating conditions. The resulting empirical models used to quantify individual contributions controlled parameters on drilling performance, facilitate temper...

Micro drilled holes are utilized in many of today's fabrication processes.Precision production processes in industries are trending toward the use of smaller holeswith higher aspect ratios, and higher speed operation for micro deep hole drilling. However,undesirable characteristics related to micro drilling such as small signal-to-noise ratios,wandering drill motion, high aspect ratio, and exce...

In automation flexible manufacturing systems, tool wear detection during the cutting process is one of the most important considerations. This study presents an intelligent system for online tool condition monitoring in drilling process .In this paper, analytical and empirical models have been used to predict the thrust and cutting forces on the lip and chisel edges of a new drill. Also an empi...

Abstract The first step of implanting teeth is to drill a hole in the jaw bone. Excessive temperature produced during drilling is one of the destructive factors for bony tissue. If the temperature generation during surgical drilling exceeds the critical temperature, it could lead to osteonecrosis. This research intends to study drilling parameters such as drilling speed, feed rate, cooling con...

the drilling is well known as one of the most common hole making processes in the industry.due to close tolerance requirement for drilled holes in the most of work pieces, onlinecontrolling of the diameter of drilled holes seems to be necessary. in the current work, an onlinedimensional controlling system was developed for drilling process. doing this, drilling processwas executed in different ...

A comprehensive benchmarking study has been carried out to determine the influence of mesh formulation and chip separation methods on reliability accuracy finite element modelling large diameter drilling operations. The Coupled Eulerian–Lagrangian updated-Lagrangian (with deletion) formulations available in ABAQUS/Explicit, together with re-meshing) DEFORM 3D are compared by simulating through-...

This research intends to investigate the effect and potential of ultrasonic vibration tools for drilling glass-fiber-reinforced plastics (GFRPs), especially with aim minimizing thrust force. As an important parameter characterize intensity, amplitude has a significant on force in ultrasonic-vibration-assisted (UVD) GFRPs. It been observed that also influences amplitude, which may eventually res...