Surface Metrology for Process Diagnostic of Ultrasonic Vibration Assisted Grinding

The application of electroplated diamond in ultrasonic vibration-assisted grinding can be a candidate to replace the manual mirror finishing of the stainless-steel surface and the ability to characterize the tool and work surfaces is important for understanding the tool-work interaction during the grinding process. In this study, an ultrasonic vibration-assisted grinding on stainless steel surface using the electroplated diamond tool is performed for the tool-work surface interaction diagnostic. The experiment used constant machining parameters, leaving the electroplated diamond tool as the only input variable. The experiment produces nine tool-work pairs for the analysis. A combination of the reversal method and areal surface metrology is introduced to capture and prepare the topography data for characterization. The analysis results show that the combination of the reversal method and areal surface metrology can be used for the electroplated diamond tool working surface characterization in explaining its effect on the ultrasonic vibration-assisted grinding of stainless-steel surface for a mirror finish

Surface Metrology for Process Diagnostic of Ultrasonic Vibration Assisted Grinding

The application of electroplated diamond in ultrasonic vibration-assisted grinding can be a candidate to replace the manual mirror finishing of the stainless-steel surface and the ability to characterize the tool and work surfaces is important for understanding the tool-work interaction during the grinding process. In this study, an ultrasonic vibration-assisted grinding on stainless steel surface using the electroplated diamond tool is performed for the tool-work surface interaction diagnostic. The experiment used constant machining parameters, leaving the electroplated diamond tool as the only input variable. The experiment produces nine tool-work pairs for the analysis. A combination of the reversal method and areal surface metrology is introduced to capture and prepare the topography data for characterization. The analysis results show that the combination of the reversal method and areal surface metrology can be used for the electroplated diamond tool working surface characterization in explaining its effect on the ultrasonic vibration-assisted grinding of stainless-steel surface for a mirror finish

Kajian ke atas keberkesanan kursus CAD/CAM terhadap kecekapan jurutera pembuatan dan jurutera mekanikal bagi graduan-graduan universiti awam / Mohamad Irwan Yahaya, Rosley Jaafar and Noor Iswadi Ismail

Penyelidikan ini telah dijalankan untuk mengkaji tentang keberkesanan kursus Sistem Rekabentuk dan Pembuatan Terbantu Komputer (CAD/CAM) terhadap kecekapan jurutera pembuatan dan jurutera mekanikal bagi graduan-graduan Institusi Pengajian Tinggi Awam (IPTA). Kemudahan teknologi CAD/CAM dapat membantu industri reka bentuk dan pengeluaran dalam menghasilkan produk dengan lebih cepat dan berkesan. Struktur kurikulum dan sukatan pelajaran bagi kursus CAD/CAM telah dirangka oleh universiti supaya wujud keseimbangan antara bidang teoretikal dan praktikal, serta relevan dengan kehendak industri. Penyelidikan ini telah dijalankan untuk mengkaji kaitan antara faktor demografi, pengalaman, dan pendidikan di universiti dengan keberkesanan kursus CAD/CAM terhadap kecekapan graduan yang bekerja dalam industri pembuatan. Penyelidikan ini terbahagi kepada empat bahagian, iaitu reka bentuk penyelidikan, pengumpulan data, analisis data, dan hipotesis dengan menggunakan perisian Analisis Data Berkomputer (Statistical Package for the Social Sciences [SPSS]). Terdapat hubungan yang signifikan antara item-item yang dikenal pasti dalam Bahagian B (pengalaman dan pendidikan berkaitan dengan CAD/CAM) dan Bahagian C (keberkesanan kursus CAD/CAM terhadap kecekapan bekerja dengan mengambil kira faktor latar belakang responden). Hasil penyelidikan ini diharap dapat dimanfaatkan oleh pihak yang berkenaan dalam proses meningkatkan keberkesanan sukatan kurikulum kursus CAD/CAM di IPTA supaya dapat memenuhi kehendak dan spesifikasi industri terutama dalam bidang kejuruteraan pembuatan

Design and fabrication of a cleaning cum cooling system for downdraft gasifier / Mohd Mahadzir Mohammud... [et al.]

Biomass is the most abundant resources and available in all parts of Malaysia. It has the potential to be one of the best options for providing theon demand renewable fuel that can be utilized in various energy conversion technologies. The producer gas produced from biomass can be used to power electricity, thermal energy, or transportation fuels. However, the producer gas needs to be cleaned before being used. In the present paper the design and fabrication of cleaning cum cooling system is shown. The cleaning cum cooling system is used to filter the unwanted particle such as dust (particulate matter), tar and to absorb moisture produced by biomass gasification. The objectives are to design the cleaning cum cooling system by using SolidWorks 2016 software, to fabricate the mechanism by lab-scaled dimensions and to cool and clean the producer gas. The cleaning cum cooling system consists of three stages of filter (water scrubber, tar absorber and silica gel). Each filter has the same dimension size that is 110mm diameter and 400 mm height. The material used is Polyvinyl chloride (PVC) pipe. The results showed that temperature output of 30.9o C is obtained at point after the cleaning cum cooling system. Other than that, 8.5 grams of particulate matter and 32 grams of concentrated tar were trapped in the water scrubber and tar absorber filters. For the moisture test, 40 grams of water was found in the silica gels. These show that the producer gas has been cleaned where a blue flame was lastly obtained. It showed the producer gas is in a good condition

Factor and Influential Variables Affecting Maintenance Cost of Urban Rail Rolling Stock

It is a known fact that the cost of maintaining rolling stock is huge due to its higher acquisition cost and maintenance activity. This research paper aims to analyse, evaluate, and rank the influential variables contributing towards rolling stock maintenance cost. A quantitative approach was adopted for data collection and factual data from Malaysia's rolling stock practitioners was collected using a survey. The research first identified the influential variables associated with rolling stock maintenance cost through literature review. A questionnaire survey was conducted among five Trains Operating Companies in Malaysia. These were performed using importance index to accomplish ranking analysis. The research has discovered five groups of predictor factors that affect rolling stock maintenance cost and 14 influential variables to execute the maintenance activity. This study has highlighted the possibility of future major studies in cost structure implied by group of predictors to predictive cost model for rolling stock maintenance

Factor and Influential Variables Affecting Maintenance Cost of Urban Rail Rolling Stock

It is a known fact that the cost of maintaining rolling stock is huge due to its higher acquisition cost and maintenance activity. This research paper aims to analyse, evaluate, and rank the influential variables contributing towards rolling stock maintenance cost. A quantitative approach was adopted for data collection and factual data from Malaysia's rolling stock practitioners was collected using a survey. The research first identified the influential variables associated with rolling stock maintenance cost through literature review. A questionnaire survey was conducted among five Trains Operating Companies in Malaysia. These were performed using importance index to accomplish ranking analysis. The research has discovered five groups of predictor factors that affect rolling stock maintenance cost and 14 influential variables to execute the maintenance activity. This study has highlighted the possibility of future major studies in cost structure implied by group of predictors to predictive cost model for rolling stock maintenance

A case study of a complex surface modeling using advanced manufacturing technology

The technology that has had the greatest impact on production systems over the last several decades is computer technology. One of the principal roles of the computer in the information - processing cycle is to integrate the different functions - design, manufacturing, and business operations - into a unified, well co-ordinated, and smooth running system. Advanced Manufacturing Technology (AMT) involves new manufacturing techniques and machines combined with information technology, micro- electronics, and new organizational practices in the manufacturing process. AMT is a key enabler to help manufacturers meet the productivity, quality, and cost reduction demands of competitive global markets. The emphasis in the entire thesis is on the use of AMT for developing complex surface. The technique of AMT facilitates the use of complex surface modeling data for rapid product development. The complex surface modeling requires application of the following stages: - The fIrst stage is the use of Co-ordinate Measuring Machine (CMM)/ for geometrical data acquisition of the work piece (object identifIcation). The complex surface model consists major features for design that has been recognized and represented by a cloud of points. The second stage of the project is the creation of complex surface modeling through Data Exchange Format (DXF) format of digitizing data. The programming of Computer Numerical Control (CNC) machine tools will then be generated using Unigraphics - Computer Aided Design / Computer Aided Maufacturing (UG-CAD/CAM) system (providing geometric modeling & numerical control part programming). The third stage is to machine the part using CNC milling machine (part manufacturing). The third stage is performed in order to verifY the complex surface of the model that has been developed in stage two. By using AMT, the complex surface of the model has been successfully created with satisfactory result. In implementing AMT, CMM was used to generate effIciently the geometrical data of the complex surface. From point clouds data, the model has been successfully developed through surface modeling using UG-CAD/CAM software