Jaharah A. Ghani | Universiti Kebangsaan Malaysia (original) (raw)

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Papers by Jaharah A. Ghani

Journal of Scientific and Industrial Research, 2012

This study presents development of an automated lead defect inspection system by using Visual Mec... more This study presents development of an automated lead defect inspection system by using Visual Mechanical Inspection Scanner (VMIS) in semiconductor industry. In any device seated out of cavity, VMIS detects misplacement error (ME), a quality defect in surface mount technology (SMT). ME causes a lifted lead defect on lead packages. MEs that can be analyzed are of two kinds: i) device seated out of cavity; and ii) double devices imbedded in the same cavity. The system was successfully tested on devices with 90% accuracy of inspection. Thus VMIS can inspect device seated out of cavity and hence prevents lifted lead from occurring.

A case-based research method was chosen with the aim to provide an exemplar of practice and test ... more A case-based research method was chosen with the aim to provide an exemplar of practice and test the proposition that the use of simulation can improve productivity. Three alternatives were performed by considering the aspects of operator, machine, and workstation to define productivity improvement alternatives for operation optimisation. The research determines the optimum result to improve the current operation system. The experiments on simulated and real data clearly indicate that the productivity improvement in the current performance can be achieved by re-allocating the number of operators and machines effectively instead of a combination. The paper presents a novel example of the use of simulation to estimate the production line performance. The paper highlights this method by addressing this operational issue and the likelihood of the success of the strategic decision to improve productivity.

Advanced Materials Research, 2012

Abstract Different techniques have been developed in the area of bearing wear monitoring. This pa... more Abstract Different techniques have been developed in the area of bearing wear monitoring. This paper proposes a different experimental study on bearing wear monitoring by using an airborne technique. The data captured in the airborne technique will be analyzed by using ...

Page 1. Barriers of SCM in SMEs Mohd Nizam Ab. Rahman 1, a , Harlina Wasilan 2, , Baba Md Deros 3... more Page 1. Barriers of SCM in SMEs Mohd Nizam Ab. Rahman 1, a , Harlina Wasilan 2, , Baba Md Deros 3 and Jaharah A. Ghani 4 Department of Mechanical and Materials Engineering Faculty of Engineering and Built Environment ...

Advanced Materials Research, 2010

Page 1. Effect of Aged AlN Reinforced Al-Si Alloys on Dry Sliding Wear Behaviour Mariyam Jameelah... more Page 1. Effect of Aged AlN Reinforced Al-Si Alloys on Dry Sliding Wear Behaviour Mariyam Jameelah Ghazali 1,a , , Mahamad Noor Wahab 2,b , Abdul Razak Daud 3,c andJaharah Ab. Ghani 1,d 1Department of Mechanical ...

Abstract. Although management of organizations are faced with a number of problems which come up ... more Abstract. Although management of organizations are faced with a number of problems which come up during implementing SCM projects, intense competition force them to overcome these difficulties on order to be successful in the fierce global market . In Developing countries, ...

Advanced Materials Research, 2010

This study presents a new method for detecting the cutting tool wear based on the measured cuttin... more This study presents a new method for detecting the cutting tool wear based on the measured cutting force signals using the regression model and I-kaz method. The detection of tool wear was done automatically using the in-house developed regression model and 3D graphic presentation of I-kaz 3D coefficient during machining process. The machining tests were carried out on a CNC turning machine Colchester Master Tornado T4 in dry cutting condition, and Kistler 9255B dynamometer was used to measure the cutting force signals, which then stored and displayed in the DasyLab software. The progression of the cutting tool flank wear land (VB) was indicated by the amount of the cutting force generated. Later, the I-kaz was used to analyze all the cutting force signals from beginning of the cut until the rejection stage of the cutting tool. Results of the I-Kaz analysis were represented by various characteristic of I-kaz 3D coefficient and 3D graphic presentation. The I-kaz 3D coefficient number decreases as the tool wear increases. This method can be used for real time tool wear monitoring.

The paper presents a studyof the effect of operating variable parameter; cutting speed, feed rate... more The paper presents a studyof the effect of operating variable parameter; cutting speed, feed rate, depth of cut and width of cut on heat being generated when end milling under MQL condition. The response surface methodology (RSM) was employed in the experiment, and a Box–Behnken design was used to determine the cause and effect of the relationship between the input variables and response. The investigated milling parameters were cutting speed (100 - 140 m/min), feed rate (0.1 - 0.2 mm/tooth), depth of cut (0.5-1.0 mm) and width of cut (0.2 -1.8 mm). Result of this study show ball nose end milling generates low temperature ranging from 69°C to 359°C. Experimental data and statistical analysis showed that heat generation was dominated by radial depth of cut, followed by axial depth of cut. Feed rate and cutting speed were found statistically not significant. The linear models were developed with a 92% confidence level. The optimum condition required for minimum heat generated include cutting speed of 117 m/min, feed rate of 0.11 mm/rev, axial depth of cut of 0.57 mm, and radial depth of cut of 0.21 mm. With this optimum condition, a minimum heat generated of 68°C was obtained.

Journal of Scientific and Industrial Research, 2012

This study presents development of an automated lead defect inspection system by using Visual Mec... more This study presents development of an automated lead defect inspection system by using Visual Mechanical Inspection Scanner (VMIS) in semiconductor industry. In any device seated out of cavity, VMIS detects misplacement error (ME), a quality defect in surface mount technology (SMT). ME causes a lifted lead defect on lead packages. MEs that can be analyzed are of two kinds: i) device seated out of cavity; and ii) double devices imbedded in the same cavity. The system was successfully tested on devices with 90% accuracy of inspection. Thus VMIS can inspect device seated out of cavity and hence prevents lifted lead from occurring.

A case-based research method was chosen with the aim to provide an exemplar of practice and test ... more A case-based research method was chosen with the aim to provide an exemplar of practice and test the proposition that the use of simulation can improve productivity. Three alternatives were performed by considering the aspects of operator, machine, and workstation to define productivity improvement alternatives for operation optimisation. The research determines the optimum result to improve the current operation system. The experiments on simulated and real data clearly indicate that the productivity improvement in the current performance can be achieved by re-allocating the number of operators and machines effectively instead of a combination. The paper presents a novel example of the use of simulation to estimate the production line performance. The paper highlights this method by addressing this operational issue and the likelihood of the success of the strategic decision to improve productivity.

Advanced Materials Research, 2012

Abstract Different techniques have been developed in the area of bearing wear monitoring. This pa... more Abstract Different techniques have been developed in the area of bearing wear monitoring. This paper proposes a different experimental study on bearing wear monitoring by using an airborne technique. The data captured in the airborne technique will be analyzed by using ...

Page 1. Barriers of SCM in SMEs Mohd Nizam Ab. Rahman 1, a , Harlina Wasilan 2, , Baba Md Deros 3... more Page 1. Barriers of SCM in SMEs Mohd Nizam Ab. Rahman 1, a , Harlina Wasilan 2, , Baba Md Deros 3 and Jaharah A. Ghani 4 Department of Mechanical and Materials Engineering Faculty of Engineering and Built Environment ...

Advanced Materials Research, 2010

Page 1. Effect of Aged AlN Reinforced Al-Si Alloys on Dry Sliding Wear Behaviour Mariyam Jameelah... more Page 1. Effect of Aged AlN Reinforced Al-Si Alloys on Dry Sliding Wear Behaviour Mariyam Jameelah Ghazali 1,a , , Mahamad Noor Wahab 2,b , Abdul Razak Daud 3,c andJaharah Ab. Ghani 1,d 1Department of Mechanical ...

Abstract. Although management of organizations are faced with a number of problems which come up ... more Abstract. Although management of organizations are faced with a number of problems which come up during implementing SCM projects, intense competition force them to overcome these difficulties on order to be successful in the fierce global market . In Developing countries, ...

Advanced Materials Research, 2010

This study presents a new method for detecting the cutting tool wear based on the measured cuttin... more This study presents a new method for detecting the cutting tool wear based on the measured cutting force signals using the regression model and I-kaz method. The detection of tool wear was done automatically using the in-house developed regression model and 3D graphic presentation of I-kaz 3D coefficient during machining process. The machining tests were carried out on a CNC turning machine Colchester Master Tornado T4 in dry cutting condition, and Kistler 9255B dynamometer was used to measure the cutting force signals, which then stored and displayed in the DasyLab software. The progression of the cutting tool flank wear land (VB) was indicated by the amount of the cutting force generated. Later, the I-kaz was used to analyze all the cutting force signals from beginning of the cut until the rejection stage of the cutting tool. Results of the I-Kaz analysis were represented by various characteristic of I-kaz 3D coefficient and 3D graphic presentation. The I-kaz 3D coefficient number decreases as the tool wear increases. This method can be used for real time tool wear monitoring.

The paper presents a studyof the effect of operating variable parameter; cutting speed, feed rate... more The paper presents a studyof the effect of operating variable parameter; cutting speed, feed rate, depth of cut and width of cut on heat being generated when end milling under MQL condition. The response surface methodology (RSM) was employed in the experiment, and a Box–Behnken design was used to determine the cause and effect of the relationship between the input variables and response. The investigated milling parameters were cutting speed (100 - 140 m/min), feed rate (0.1 - 0.2 mm/tooth), depth of cut (0.5-1.0 mm) and width of cut (0.2 -1.8 mm). Result of this study show ball nose end milling generates low temperature ranging from 69°C to 359°C. Experimental data and statistical analysis showed that heat generation was dominated by radial depth of cut, followed by axial depth of cut. Feed rate and cutting speed were found statistically not significant. The linear models were developed with a 92% confidence level. The optimum condition required for minimum heat generated include cutting speed of 117 m/min, feed rate of 0.11 mm/rev, axial depth of cut of 0.57 mm, and radial depth of cut of 0.21 mm. With this optimum condition, a minimum heat generated of 68°C was obtained.