A Study on Surface Roughness and Burr Formation of Al6061 with Different Spindle Speed and Federate for Small End Milling Cutter

This paper reports the results of experiments to investigate surface roughness and burr formation during the slot milling of Aluminum 6061. The experiment was carried out with small cutting tool diameter and several of spindles speed and federate. Generally, cutting parameters will influence on surface roughness and the formation of burrs in small slot milling operations. Although it is not possible to avoid burr formation by modifying the cutting parameters, the burr size can be reduced by selecting the appropriate values. The results showed that slot milling with cutting tool with diameter 2.0mm and 3.0mm have a similar behavior for surface roughness with respect to federate and spindle speed. The larger cutting tool diameter results in a larger burr formed. Burr height increased due to larger chip load as the spindle speed increased. It also shown that Burr-breakage type of burr more significant in cutting AL606

Investigation of Surface Roughness and Material Removal Rate (MRR) on Tool Steel Using Brass and Copper Electrode for Electrical Discharge Grinding (EDG) Process

This paper presents the investigation on surface roughness and material removal rate (MRR) of tool steel machined with brass and copper electrode for Electrical Discharge Grinding (EDG) process. The machining parameter include pulse ON time, pulse OFF time, peak current and capacitance. Analysis of variance (ANOVA) with Taguchi method is used to investigate the significant effect on the performance characteristic and the optimal cutting parameters of EDG. The result shows that, the surface roughness value when using of both tool materials are mostly influenced by pulse ON time and peak current. The capacitance parameter in both experiments was not giving any significant effect. The significant factors for the material removal rate due to the machining parameter are peak current parameter and ON time parameter but it also can increase the machining tim

DETERMINANTS OF SUPPLY CHAIN PERFORMANCE: A STRATEGIC POINT OF VIEW.

With the application of supply chain strategy, retailers can make a wise decision to increase supply chain performance. This study is one of the novelties in supply chain management research because it aimed at empirically analyzing the influence of supply chain strategies as the determinants of retail supply chain performance. For the purpose of the study, data were collected with a structured questionnaire from 115 mangers of some selected retail chain stores in Bangladesh. Collected data were analyzed using Partial Least Squares method with smart PLS software version 2.0M3. The present study has shown some meaningful findings regarding the determinants of retail supply chain performance. Firstly, it is found in the study that agile supply chain strategy is the most pivotal factor influencing retail supply chain performance. The lean strategy was also found to be a contributor to the retail supply chain performance while hybrid strategy was found to exhort very weak influence in increasing the performance of retail supply chain. The findings of this study can benefit the supply chain managers involved in retailing. From this study retail managers can know which strategy they should adopt to bring forth substantial advantage for the companies by maintaining their supply chain in a better way

Development and Analysis of Taper Tool Path for Micro Turning Operation

This paper presents the taper tool path scheme for micro turning of brass. Based on tool path technique for straight cutting, tool paths for taper shape are produced. This study covers the effect of cutting parameters with the use of different tool path method. The result shows that reverse cut is considered to be the most accurate as it has the smallest figure of average difference in the intended dimension. This is followed by step cut, whole cut and disk-2 cut. It shows which tool path is the most suitable for high precision machining. Defects and accuracy of the desired dimension in several tool path methods are observed and discussed

Experimental investigation and finite element analysis of Magnesium Alloy (AZ31B) in Micro Electrical Discharge Machining μEDM)

Abstract Electric discharge machining (EDM) is a non-conventional machining use thermal energy from overheated electron source to remove small portion of material. EDM process has an advantage on high geometric complexity and micro leveling of dimensioning. The present of thermal energy to eliminate the unwanted material in EDM are highly depending on heat affected zone. This can contribute to decreasing of the product quality with surface roughness and micro crack existing after machining. Magnesium alloys (AZ31B) material has the special characteristic to explore the heat distribution effect on the heated surface. Finite element analysis with heat flux Gaussian boundary condition is applied to understand the governing equation of the heat behavior. At the same time, finding the size of spark created on the AZ31B gap is studied. The ANSYS software applied to simulate the heat distributes on the AZ31B surface. The simulation of ANSYS indicates potential zone of material removal through heat distribution. The simulation is compare to the actual experimental of μEDM and finds the similarities. The heat distribution on AZ31B with different size of spark shows a good agreement between simulation and experimental results.</jats:p

Design, Analysis and Verification of 4 Micro Cavities for a Standard Runner System

AbstractThis paper presents the design, analysis and verification of 4 micro cavities for a standard system using a molding software package. It is essential to design a runner system which is best suited for a micro injection molding. In designing the runner system, one of those significant criterion is the ease of the micro cavity filling. The simulation and analysis through molding software package is conducted with the purpose of providing necessary data for the purpose of optimizing each and every different runner system studied in this work. Robust design is employed and orthogonal arrays as well as analysis of variance are utilized in order to obtain an optimum result in each runner system analysis. At the end, optimized runner systems were evaluated against a small number of criteria which are mainly the filling characteristic and the efficiency of the runner system

Micro Plastic Part Filling Capabilities through Simulation and Experiment A Case Study on Micro Gear Shape

Injection molding is one of widely used plastic processing techniques for the plastic products manufacture. It is well suited for mass production because the raw material conversion into a final product usually requires only a single operation. Moreover, minor or no finishing process is required. The process is capable of producing very complicated part geometries with light specifications, Due to high productivity and flexibility, injection molding applications have grown rapidly in various industrie