Kaizen: The key to Japan‚s competitive success

System of experimental design : engineering methods to optimize quality and minimize costs

An Improved Grading System For Measuring Plant Diseases Vol-36

Binder Jet printing is an additive manufacturing technique that dispenses liquid binding agent on powder to form a two-dimensional pattern on a layer. The layers are stacked to build a physical article. Binder Jetting (BJ) can be adapted to almost any powder with high production rates and the BJ process utilizes a broad range of technologies including printing tehniques, powder deposition, dynamic binder/powder interaction, and post-processing methods. A wide variety of materials including polymers, metals, and ceramics have been processed successfully with Binder Jet. However, developing printing and post-processing methods that maximize part performance is a remaining challenge. This article presents a broad review of technologies and approaches that have been applied in Binder Jet printing and points towards opportunities for future advancement.

Binder jetting: A review of process, materials, and methods

Stereolithography is a solid freeform technique (SFF) that was introduced in the late 1980s Although many other techniques have been developed since then, stereolithography remains one of the most powerful and versatile of all SFF techniques It has the highest fabrication accuracy and an increasing number of materials that can be processed is becoming available In this paper we discuss the characteristic features of the stereolithography technique and compare it to other SFF techniques The biomedical applications of stereolithography are reviewed, as well as the biodegradable resin materials that have been developed for use with stereolithography Finally, an overview of the application of stereolithography in preparing porous structures for tissue engineering is given

A review on stereolithography and its applications in biomedical engineering

Government legislation and public opinion are the main drivers behind the movement of manufacturing companies towards sustainable production. Fundamentally, companies want to avoid future financial penalties and the industry is therefore under pressure to adapt new techniques and practices in order to become environmentally friendly. The cost efficiency of metal cutting operations is highly dependent on accuracy, excellent surface finish and minimized tool wear and, to this end, has traditionally made abundant use of cutting fluid in machining operations. However, these cutting fluids have been a major contributor to environmental and health issues. In recent years, an enormous effort to eradicate these adverse effects has been made with one important focus being the implementation of minimum quantity lubrication (MQL). In the present work, the authors have reviewed the current state of the art in MQL with a particular focus on drilling, turning, milling and grinding machining operations. Overall, it is concluded that MQL has huge potential as a substitute for conventional flood cooling.

/pdf/a-review-identifying-the-effectiveness-of-minimum-quantity-jv1qakw94g.pdf

A review identifying the effectiveness of minimum quantity lubrication (MQL) during conventional machining

Metal matrix composites (MMCs) are materials which have been widely used in the aerospace and automobile industries since the 1980s and have been classified as hard-to-machine materials. During the intervening years, only a limited amount of research has been conducted into the cutting action of MMCs. As with traditional materials, it is important to understand the wear mechanisms that contribute to tool wear which reduces tool life. The objective of this research is to evaluate the machinability characteristics for these hard-to-machine material MMCs. This review will also establish the optimum machining parameters vital to maximizing tool life whilst producing parts at the desired quantity and quality.

/pdf/review-of-machining-metal-matrix-composites-3ywq58kt76.pdf

Review of machining metal matrix composites

This study investigates geometrical errors such as cylindricity, circularity and diametral errors of a feature (a hole) produced from wire electrical discharge machining of Ti6Al4V alloy wh...

Optimizing dimensional accuracy of titanium alloy features produced by wire electrical discharge machining

The need for using alternative processes rather than electro-discharge machining (EDM) for micro-parts has allowed micro-manufacturing (also known as precision engineering) to become an important option due to its speed, economy, capability and extended range of materials. One main group of micro-manufacturing processes is that of micro-mechanical cutting with the focus of this review being micro-mechanical cutting processes that generate chips, namely, micro-turning, micro-milling and micro-drilling. Developments and future prospects for these micro-machining processes have been reviewed including micro-cutting configurations, cutting tools, tool coatings, cutting fluids, chip formation, surface finish, burr formation, modelling and industrial applications. The main advantages and disadvantages of these micro-manufacturing processes have been highlighted together with their future prospects.

/pdf/a-review-of-micro-mechanical-cutting-2b08mqyios.pdf

Mohammad Nazrul Islam

Papers

A review identifying the effectiveness of minimum quantity lubrication (MQL) during conventional machining

Review of machining metal matrix composites

Optimizing dimensional accuracy of titanium alloy features produced by wire electrical discharge machining

A review of micro-mechanical cutting

Electrical discharge machining of 6061 aluminium alloy