Papers by Keyword: Machine Design

Abstract: The Grés Porcelain stoneware surely represents a remarkable material for building inside the large family of constructive ceramics. It is appreciated in consideration of its superior properties of resistance and functionality, especially when considered respect to a relatively low cost. Billions of square meters of Grés Porcelain are produced worldwide each year, primarily in form of tiles of every dimension, thinness, color, decoration, in the way that the ceramic tile industry represents a relevant economy. But the tile manufacturing is a complex process, made by different stages and productive plants to be deeply investigated and optimized. This paper describes the use of Finite Elements for modelling and optimizing the production of Grés Porcelain tiles with special attention to the ending phases of the process, just after the treatments in kiln and realized by tool machining. The case study, used to redesign a fundamental part of a finishing machine driven by a numerical approach, is also detailed.

Abstract: Stereolithography is a manufacturing process capable of building a truly high resolution 3D structure by solidifying the liquid monomer in a layer by layer fashion. Currently, there are many developments toward new 3D printing techniques leading to needs for methods of characterization to improve printing process for higher performance. In this study, we propose to create a bottom-up projection stereolithography to accommodate a 3D printing technique. Our system was designed for combining with a regular fused deposition modeling (FDM) process for multi-material application. In addition, we developed a method for characterizations different specifications of a custom-made projection stereolithography. Our 3D printer can create an object up to 25 mm x 25 mm x 15 mm of length, width and height, respectively. We minimized the layer thickness error by modifying a screw and spring components in order to precisely control the movement of the vertical stepping. The light source distance and the calibration factor were also importance factors to obtain the better precision of finished parts. Based on the proposed characterization method, the 3D printer was able to achieve the lateral resolution of 0.05 mm and a vertical step resolution of 0.01 mm. The average percentage error of built part were 0.32 % on X-axis and 0.25 % on Y-axis laterally and 0.60 % error on the layer thickness.

Abstract: Press was an important kind of mechanical equipment manufacturing need, and it has been widely used in equipment manufacturing, but its security problem had not been solved. Accidents have caused wide attention. Through the analysis of press injury accident, this paper expounded the importance of press safety protection system. According to the study of existing press safety protection system analysis and the theory of knowledge, a specific design scheme was put forward.

Abstract: Oil palm evacuation are still labour dependent and room for mechanisation may still exist. With the importance of this industry as one of nation’s economic contribution the efforts are still considered viable. In order to reduce, improve and empower labours a new concept design was developed. A mock-up interaction was done in virtual environment in order to assess the ergonomic aspect of the design in order to determine the pros and cons of the concept design. The findings had led to a conclusion for a requirement of a more thorough assessment to assess human machine interaction in terms of biomechanical effects.

Abstract: Linear friction welding is a solid-state joining process developed for non-axisymmetric components in which the joining of the specimens is obtained through reciprocating motion and pressure. In the process, the friction forces work due to the high frequency oscillation and the pressure between the specimens is converted in thermal energy. In order to design an effective machine, relevant issues derive from the high frequency and the large inertial forces involved in the process. In this study, the authors describe the redesign of a preexisting prototypal machine for LFW processes. A machine redesign is needed when welding high resistant materials, i.e. steels or titanium alloys, with high frequencies, up to 72 Hz. The sensors equipping the machine allows in process measurements of key process variables as temperatures of the specimens, tangential forces, accelerations and speeds. At the same time through the acquired data, the main weaknesses of the machine can be highlighted allowing for effective redesign.

Abstract: This paper introduced the definition of modern design method at first. Then the paper analyzed some typical modern design method such as optimization design, green design, man-machine engineering design, innovative design, industrial molding design, concurrent design, reliability design, finite-element method, robust design method and so on. The paper not only analyzed on the characteristics of them but also analyzed their applicability at the same time, at last the paper analyzed the application of those modem design methods in the design and develop process of mechanical product.

Abstract: Current domestic and international for the experimental apparatus been associated asynchronous motor design generally used hand horseshoe magnet rotates to drive the rotor rotates, While it is possible to achieve, the apparatus is too simple, and the effect is not in great satisfaction. To further improve the experimental results, a new type of asynchronous motor experimental device is designed, whose working mechanism is a DC motor as a driving source, driven by a reduction gear mechanism to produce a rotating magnetic field, the control circuit can be achieved by utilizing the rotational speed and adjust direction. By apparatus of the stator, rotor apparatus, the related motor control and display device design can make the operation more stable, more easily observed. The experimental apparatus can enhance students' awareness and understanding of asynchronous motor, so that the original abstract theory becomes boring incomprehensible gusto, to stimulate students' desire for knowledge, strengthen students' practical knowledge and ability, with higher practical significance. The apparatus simple shaped, with simple and safe operation, is able to facilitate teaching, with better promote the use of value.

Abstract: With the development of network education, the importance of the research network teaching system is more and more prominent. The network teaching system an autonomous, distributed teaching environment based on Web by using the network as the carrier of information, construct. Along with the network popularization, the network teaching based on Web will become one of the most important teaching modes of education in the future. Computer assisted instruction (CAI for short) is one of the most advanced means of modern education technology. This paper mainly discusses the application of computer network technology in auxiliary mechanical design course teaching. The advanced network technology in computer aided instruction is introduced in the auxiliary mechanical design course teaching, which is one of the most significant reform teaching systems facing in the 21st century.

Abstract: Mechanical products are becoming increasingly precise after industrial revolutions. Design is important for the manufacture of those products. Good mechanical design can improve the quality of product, and the efficiency of manufacture. To find the problems in the design and then improve the design, it needed the simulation process after the mechanical design was completed. Computer technologies in simulation process, such as software technology and virtual technology, were deeply studied in this work which combined practice with the concept and characteristics of machine design.

Abstract: In automotive applications, the requirements for the electrical machines are about performance and reliability - the permanent magnet synchronous machines ensure these requirements are fulfilled. The approach of the present paper is to analyze the permanent synchronous machines suited for the integrated starter-alternator (ISA) applications. The study design requires some analytical, followed by a numerical analysis and also a finite element method in order to achieve the performances of the machine. The operation modes of an ISA system and the constraints for an electric machine acting as an ISA are detailed. Finally a model for a ISA hybrid vehicle, developed in AMESim is presented and the results of a simulated drive cycle are presented.