Beng Siong Lim

• Singapore Institute of Manufacturing Technology

In recent years, increasing demands for more efficient high speed milling (HSM) processes have propelled the application and development of more effective modeling methods and intelligent machining approaches. Hence, a desired reference model has to incorporate more efficient and sophisticated feature extraction and artificial intelligence (AI) tec...

Tool condition monitoring (TCM) is a necessary action in a high-speed milling (HSM) process. As a worn milling tool might irreversibly damage a workpiece, there is a vital demand for a TCM system to evaluate the tool wear progress, or equivalently the resultant surface roughness, nonintrusively. To build up a condition monitoring system for HSM pro...

The process of high speed milling is regarded as one of the most sophisticated and complicated manufacturing operations. In the past four decades, many investigations have been conducted on this process, aiming to better understand its nature and improve the surface quality of the products as well as extending tool life. To achieve these goals, it...

Tool Condition Monitoring (TCM) is a necessary action during end-milling process as worn milling-tool might irreversibly damage the work-piece. So, there is an urgent need for a TCM system to provide an evaluation of the tool-wear progress and resulted surface roughness. Principally, in-process tool-wear and surface roughness measurements requires...

In this paper, the viability of using Fuzzy-Rule-Based Regression Modeling (FRM) algorithm for tool performance and degradation detection is investigated. The FRM is developed based on a multi-layered fuzzy-rule-based hybrid system with Multiple Regression Models (MRM) embedded into a fuzzy logic inference engine that employs Self Organizing Maps (...

The application of titanium alloys are increasingly seen at aerospace, marine, bio-medical and precision engineering due to its high strength to weight ratio and high temperature properties. However, while machining the titanium alloys using solid carbide tools, even with jet infusion of coolant lower tool life was vividly seen. The high temperatur...

Surface Finishing and End Milling are among the most sophisticated manufacturing processes. For the industry to improve the quality of its end-line products, it is important for improving the performance of these processes by having a descriptive reference model. Using this reference model, non-intrusive prediction of the resulting surface quality...

In this paper, the viability of using Fuzzy-Rule-Based Regression Modeling (FRM) algorithm for tool performance and degradation detection is investigated. The FRM is developed based on a multi-layered fuzzy-rule-based hybrid system with Multiple Regression Models (MRM) embedded into a fuzzy logic inference engine that employs Self Organizing Maps (...

Ball-nose end-milling process is considered as one of the vital metal removal processes for aerospace pieces. The product surface quality highly depends on how this process is performed. One of the factors that affect the resulting surface roughness is the performance of the ball-nose cutter used. However, this performance changes with the degradat...

High Speed Machining centers (HSM) are considered as complicated industrial instruments. Finishing is a critical process in production procedure which is carried on by these machines. Among many types of cutters, ball-nose cutters are the preferred cutters to do these kinds of operations since they have extensive operating cutting edges and appropr...

Partial discharge (PD) detection has been used in assessment of condition reliability of electrical insulation in high voltage equipment such as power station. Unfortunately, PD signals took during condition monitoring are often corrupted with excessive interference. The challenge to effectively and accurately determine and extract the pure PD sign...

The researches in tool condition monitoring often collect large amount of sensor signal data from experiments to study the complex tool condition relationships with signals. In order to provide new light into this process on a real-time basis, it is critical to identify and detect abnormality at the lowest resolution possible so that the wear beha-...

Tool failure may result in losses in surface finish and dimensional accuracy of a finished part, or possible damage to the work piece and machine. This paper presents a Fuzzy Neural Network (FNN) which is designed and developed for machinery prognostic monitoring. The FNN is basically a multi-layered fuzzy-rule-based neural network which integrates...

This article describes an intelligent knowledge-based object-oriented process planning (IKOOPP) system for the manufacture of progressive die plates. A die assembly is designed using a variety of standardised components based on a computer-aided design (CAD) system. A feature recognition module extracts all the pertinent geometrical properties and...

This paper presents a method suitable for on-line estimation of RFID data traffic load in a RFID network, specifically the average arrival rate of each reader. The novel approach comprises of measuring the dynamics of tag data flow into middleware from associated readers including the average dwelling time of a tag in a reader and average tags arri...

In the mould making process, inevitable human error can arise with the authentication, verification, measurement, recording, programming and arrangement of electrodes prior to the electro-discharge machining (EDM) process. The focus of research is to develop effective methodologies that can proactively eliminate preventable errors. Cost-effective m...

Embryonic stem cells, ESC are the foundation for all the tissue and organ, in the body. They are unique and have the ability to differentiate into any type of cell in the human body. Large number of experiments is usually required in order to establish how stem cells can be effectively grown outside the body before they can be effectively used in r...

In the mould making process, inevitable human error can arise with the authentication, verification, measurement, recording, programming and arrangement of electrodes prior to the electro-discharge machining (EDM) process. Cost-effective multi-sensor fusion techniques for the identification of electrodes; verification of the sequence and the preced...

Embryonic stem cells, ESC are the foundation for all the tissue and organ, in the body. They are unique and have the ability to differentiate into any type of cell in the human body. Large number of experiments is usually required in order to establish how stem cells can be effectively grown outside the body before they can be effectively used in r...

Diner-waiter pattern has been proposed to improve the real-time performance and resource usage in distributed control. This paper further proposes an approach to enhance and implement the diner-waiter pattern in an agent framework with QoS being the time delay measured from the request is raised until the service is fulfilled. The time critical ser...

Faced with stiff competition, regional mould makers are compelled to seek for cost effective methods to increase their performance in the production of large, error free and fully engineered moulds all within a very short lead-time - 4 weeks. One of the major challenges in mould making is associated with the pre-EDM (electro-discharge machining) ac...

In order to remain highly competitive, mould makers are compelled to shorten lead-time to produce mistake free complex mould for high value quick-turnaround products. One of the critical processes in mould making is the electro-discharge machining (EDM) process, which uses a large variety of precisely machined electrodes for making thin walls and s...

The main objective is to explore new on-line techniques that can extract, distil and integrate the raw data gathered from the scientists into design requirements for the manufacturers of automated laboratory line. A Web-based prototype is implemented. It allows the equipment designers to interactively modify the questions after the launch of the su...

Rapid prototyping technology enables rapid production of complex objects directly from a computer-aided design model without involving any tooling or conventional part programming. This has created a new set of problems associated with part design, process planning, support design and value engineering analysis of rapid prototyping parts. In this p...

A prototype twin-arm robot workcell has been developed for modular fixture assembly. Model-based robot programming plans collision free robot path, and generates an off-line program. A six-component force/torque sensor detects local frames in the real world. Automatic framing compensates the discrepancy between the ideal world in the CAD model and...

A progressive die is a tool for producing large quantities of sheet metal components rapidly, accurately and economically. The design of the press tool and its process planning functions are very specialized and knowledge-intensive activities. In order to effectively address the problems associated with the process planning function, an intelligent...

The aim of this paper is to trace the evolution of modular fixturing systems (MFS) and its impacts on high-precision machining industries. The strength of current computer-aided tools for modular fixture design is reviewed together with their weaknesses. Recent trends in the integration of knowledge-based and 3D solid CAD techniques for modular fix...

The elective introduction of the computer integrated manufacturing (CIM) concept requires a coordinated effort to use and control the knowledge, information, data and material within an organization. This article describes a framework of an intelligent computer integrated manufacturing information and data exchange system, CIMIDES together with som...

The GRUMMAN INTERNATIONAL NANYANG TECHNOLOGICAL INSTITUTE CAD/CAM CENTRE is currently developing an Intelligent Flexible Manufacturing System for the machining of complexed shaped components. The equipment which has been installed includes an automated storage and retrieval system with a vertical transfer system; a Scara robot with an assembly tabl...

The advent of CAD/CAM system, robotics simulator and off-line programming tools has provided a significance contribution to advanced manufacturing technology. A natural progression would be to integrate these computer aided tools with a robotics workcell within a flexible manufacturing system, FMS. Such an integrated approach is currently developed...

Production scheduling is a complex function which assigns the available resources to meet a specific set of requirements while adhering to time, capacity and performance constraints. An effective production schedule should reflect the full detailed information about the constraints to satisfy the current workload, backlogs, finished stocks, rework,...

The introduction of CIM systems together with intelligent information flow in an organization require an integrated approach to problem solving. This integrated concept enforces management and the shop floor personnels to merge together to establish strategies that will enhance the performance of a manufacturing organization. The degree of integrat...

Component design and tool engineering functions are two sequentially related activities. Many additional benefits may arise if these activities can be effectively integrated together within a central environment. The principal aim of the research described in this paper is to develop a component design and tool engineering Intelligent Knowledge Bas...

The true potential of a CIM system cannot as yet be fully realised. A further requirement is for a device which can extract manufacturing information from the outset. The main aim of the research described in this paper is to develop a knowledge-base system for extracting such information and to promote a coming together of design and manufacture....

In order to remain highly competitive, mould makers are compelled to shorten lead-time to produce complex mould with electro-discharge ma-chining (EDM) process. Potential sources of errors, especially for some manual processes such as setup and presetting of electrodes, programme preparation, electrode sequence validation and management of a large...

This report presents multi-modal sensing and correlation modelling technologies for condi-tion-based monitoring. Twelve sets of high-speed machining (HSM) nano-coated, micro-grain tungsten carbide cutters were used for the experiments. With the collected sensor signals, a multi-modal sensing for advanced signal processing to monitor the perform-anc...