DEVELOPMENT OF AN EXPERT SYSTEM FOR MATERIAL SELECTION OF MACHINE PARTS

Engineering Material selection is a very difficult task because of unlimited available materials. This research was carried out to develop a user-friendly interface that would allow an individual to filter through a large number of materials in order to find the most suitable material options for the production of some selected machine parts. Material selection mathematical models, for twenty-five common machine parts, were developed using the Ashby model format. The software tool used in the development of the expert system is PHPMyAdmin. This was written in Hypertext pre-processor (PHP) language designed to handle the administration of MY Structure Query Language (MySQL) server over the World Wide Web. The system was implemented using the Expert system to predict the material for machine parts of the previously fabricated project. The result of these tests shows that for a developed soya beans milk extraction machine, the software suggested low carbon steel for the shaft in place of mild steel used for the fabrication. Comparing the software predictions for shaft materials with standard materials (in textbooks) used `for manufacturing these parts shows greater conformity. The software is highly recommended for manufacturing industries to improve their material choice for mass production

Design and manufacturing of a Selective Laser Sintering test bench to test sintering materials

The goal of this project is to design and build a prototype of recoating system for a laser cutting machine to turn it into a selective laser sintering printing machine. This prototype will be used to study new sintering materials and to design, if decided, a SLS 3D printing Machine (Selective Laser Sintering). This project has been developed in the installations and funded by Fundació CIM. The project develops the mechanical design and the electronic system design. Both parts are explained on this paper, so new users can use the machine and can understand the system. With this paper, it is expected that it can be improved in a future to test other parameters and configurations. The paper is divided in three basic blocks that are summed up here: The first block is an introduction to the 3D printing technologies. The most used of them are explained and selective laser sintering is explained in deep. With this block the reader can understand why it is important to develop the SLS technology and what has to be done to improve the machines and the technology. The second block is a discussion on the mechanical design of the machine. The general idea of the machine is explained so the user can understand why the machine is designed in this way. After that, each part is detailed to see how the different mechanical challenges where overtaken. At the end of the block, there is a small calculations section needed on the electronic part. The third block is an extensive explanation of the electronic system that controls and moves the machine. In that block, the different components are explained so the user can understand its basics working principles. It is also explained how the selection of the electronic components was done. Then everything is put together to see the whole electronic system. Along with this paper, there are annexes that provide some extra information for the reader. One of this annexes refers to the mechanical part and the other one has some datasheets and coding for the electronic section. The whole design has been done in SOLIDWORKS cad software and its electric extension ELECWORKS. The programming job was done with Arduino compiler

Rancang Bangun Mesin CNC Router Mini Untuk Pembelajaran Mahasiswa Jurusan Teknik Mesin

The aims of this research are accelerate finishing time and improve the accuracy of manufacture of the engraved contour products on work pieces such as soft metals, acrylics, and wood. Methods of these researches were designed, manufacture, and experimented based on work of the machine. Components of the mini CNC router machine are designed by autodesk inventor software, its dimensions 60 x 60 cm. Furthermore, the calculation and selection of materials, manufacture of machine components, calibrated by mach3mill software and testing the performance of the engine in the three-axis movement mode; manual mode, MDI, and automatic third axis X, Y, and Z using the NC program. The results obtained show the accuracy and precision of the three X, Y and Z axis trajectories according to the permissible tolerance values, 0.01 mm, 0.01 mm and 0.05 mm respectively. The suitability of the program made and the machining results on the contour of the workpiece engraving do not show significant deviations, 0.1 mm for the X and Y axis, and 0.3 mm for the Z axis. Making engraving products on workpieces by using a CNC Router machine is faster and more efficient than manual manufacturing. Research output of this CNC router machine will be used in the practicum jobs for the NC basic programming practice cours

Rancang Bangun Sistem Kontrol Mesin CNC Milling 3 Axis Menggunakan Close Loop System

A multi axis of CNC machine needs a circuit control systems that function as the engine's brain. The purpose of this research is to design and developing a circuit control of the CNC milling machine with 3 axis movement. All machining parameters would be setup and operated through the control system so that the machine can operate in accordance with the design in three axes. In the design of the control system used 3 stepper motors as a driver, where each was enabled to move the engine against the x, y, and z axis. There are several steps that must be done in this design, such as the selection of control element data. Furthermore, control elements consisting of Breakout Board, Motor Driver, Stepper Motor, Power Supply, Limit Switch, and Emergency Stop are assembled according to schematic control design. The control system was connected to the PC through the Mach3 software interface to be used to drive the actuator. Prior to use for machining processes, the control system needs to be calibrated so that the machine's sliding dimension matches the command dimensions of the PC. Control system on CNC machines designed using a close loop system where there was a Limit Switch as a feedback sensor to the engine, so what if there was a mistake (error) on the track machine, then the sensor would command the spindle back to home position

Rancang Bangun Alat Bantu Meja Lift Otomatis Pengangkut Silinder Menggunakan Sistem Linear Aktuator Elektrik

CV. Setia Abadi Printing is a company that engaged in the packaging industry. The machine used by this company is a rotogravure printing machine, most of which are desingned and made personally by the owner of the company. The cylinder component is an important part of the rotogravure printing machine because in the production process the cylinder component is in direct contact with the production material, namely plastic. In transporting cylinder components, employees still use manual labor from the workshop area to the production area with a distance of 350 meters and the weight of the cylinder components reaches 50 kg, so it is very ineffective and waste a lot of manpower. The method used by the author is the Ulrich method through the selection of several design concepts, the design of which is assisted by CAD software for drawing, fabrication, assembly of machine components and tool testing to determine the production results of the tool. Based on the results of planning and design that has been done, the dimensions of the tool with the main dimension 1395 mm x 580 mm x 1092 mm. For drive is designed using a linear system of electric actuators. In the prototype test the automatic lift table tool cylinder transporter using a linear system of electric actuators was able to carry a load of 50 kg and lifted as high as 1 meter

Application of CAD/CAM in the design of machining process and tooling devices for flange tube

Recently, computer-aided design and computer aided manufacturing (CAD/CAM) is largely applied in universal machinery due to the accelerated development of computer technologies. Owing to the technical application of CAD/CAM tool in the manufacturing industry, enterprises have progressively changed their traditional approaches to design and manufacture of products. The CAD module provides product designers with capabilities of designing product model by feature-based design and obtaining product data. The product model is displayed on a screen in the CAD environment before transferring it downstream to the CAM module. This paper presents the application of CAD/CAM in solid modelling, design of machining process, fixture design and virtual manufacture of a flanged tube. Pro/Engineer (Pro/E) Wildfire 4.0 was used to create the three dimensional (3D) model of the flange tube based on its two-dimensional drawing (2D) blank drawing and the mould was designed and created using the same software. The mould creation was based on the clamping and positioning devices of the flange tube being manufactured. The technical schedule of the flange tube was worked out including the choice of machining method, machine tool, cutting tool and selection and computation of machining parameters based on finished drawing the flange tube. Two dedicated fixtures for holding the flange tube in the machine tool were designed and finally Master CAM 9.0 software was applied to the virtual machining of the mould. It is concluded that CAD/CAM tool is important in manufacturing technology as it automates the manufacturing process thereby saving time, energy, cost, and making production highly flexible