Papers by Keyword: Production Process

Abstract: The production process, microstructure, and mechanical properties of 15MnNbR pressure vessel steel were studied by optical microscopy, universal tensile testing, and low-temperature impact toughness testing. It was found that the microstructure obtained after controlled rolling and cooling (known as thermo-mechanical control processing) consisted of ferrite and pearlite with non-uniform grain size. The banded microstructure was prominent, the strength was high, and the toughness was poor. After normalizing, the grain size was refined, both the microstructural uniformity and the banded microstructure were improved, and the strength and toughness of the steel were enhanced. After normalizing and water cooling, the grain was further refined, the microstructure was homogenized, the banded microstructure disappeared, and the strength and toughness of the test steel were improved simultaneously, resulting in excellent comprehensive mechanical properties.

Abstract: The present research aimed to develop natural rubber (NR) hybrid composites reinforced with calcium carbonate/carbon black (CC/CB) and calcium carbonate/silica (CC/SC). The influence of CC/CB and CC/SC with various filler ratios (120/0, 90/5, 60/10, 30/15 and 0/20) on cure characteristics and mechanical properties of the vulcanizates was investigated and their reinforcing efficiency was compared. It has been found that incorporation of CB in the hybrid filler decreases the scorch time and cure time but increases crosslink density, whereas the incorporation of silica showed cure retardation. As CB or SC content increases, stiffness, tensile strength and tear strength increase, while elongation at break and compression set decrease. Scanning electron microscopy studies also reveal poor filler dispersion and poor adhesion between filler particles and matrix in the vulcanizates with increasing in CC content in a weight filler ratio which causes inferior mechanical properties. Incorporation of CB or SC content enhanced the mechanical properties of the vulcanizates, where CC/CB hybrid system exhibited higher reinforcing efficiency compared with CC/SC hybrid system.

Abstract: In today's competitive world the main direction of improvement of any production is the modernization of known technological processes and creation of new ones. A huge role in improving the process of manufacturing parts is played by computer and innovative technologies that allow to adjust technology to create the best quality castings at the lowest cost. All of this ultimately leads to saving materials, energy, labor time, protects equipment, and in return we get a lot of unique information about the process.

Abstract: In modern society, due to the improvement of industrialized and development of marine economy, pollutants in the atmosphere and water aggravation corrosion of steel structure, annual worldwide economic losses due to corrosion is astronomical figures. Hence, atmospheric corrosion resistance of weathering steel has a broad market prospect. In addition, it also has excellent mechanics, welding and other properties. This paper mainly discusses the structure, production process, performance organization and the effect of various alloying elements on weathering steel.

Abstract: This document represents the intersection of technological, logistical economic level management in the manufacturing sector. The basis for the success of the production plant is correctly chosen strategy, which should be directly linked to the business plan. Its development cannot do without knowledge, basic knowledge of strategic management, logistics, technology and economic indicators.

Abstract: To solve the problem in the process of prefabrication of U-shaped canal, this paper mainly introduces the U-shaped canal production line that adopts production process of flowing water machine and continuous curing method. The production process can adapt to a variety of specifications U 300 - U1000 (length of concrete U-shaped canal products is 2000mm). Tank production line has production capacity of concrete U-shaped canal of 100 cubic meters every day. The production line can automatically run, in each location as well as human intervention, easy to control the production rhythm and production organization and management. Through the process, making the U-shaped canal can be manufactured in large-scale. It can play an important role in national food security, steady and rapid economic development and social harmony and stability on basis of water conservancy.

Abstract: During the bending of tubes, specific geometric deviations from the desired shape geometry occur. These deformations comprise cross-sectional deformation, wall-thinning of the outer arc and wall-thickening of the inner arc. During the bending of parts with small bend factors, geometric deviations on the inner arc in form of waves and wrinkles may arise as other typical quality criteria. A quantitative evaluation of those deviations has yet to be defined. Currently, only an instruction for measuring the height of the wrinkles at the inner arc according to DIN EN 13480-4 is known. In this standard, only the two highest wrinkles and the valley in between are included. The characteristics of the wrinkle, especially the flank angle and the rise of deformation are disregarded, although they are responsible for the failure of the bent part. Tool damages can also occur. A development of an evaluation factor to assess deformations in the bow area for bent parts is presented in this paper. In addition, it will be possible to quantify geometric deviations in the bow area. By using the newly developed evaluation factor for geometrical deformations in the bow area, the determination of the quality of the bent part should become more reproducible.

Abstract: The aims of this research are to identify and to analyze the need of accounting information systems, including the processes, procedures, and also the documents which related to the production process in XYZ. Next step, We conduct designing accounting information systems which is useful to support current business process. Analysis and design the systems that we conducted, related to the organizational structure and current business processes. Its analysis and design systems based on the theories of accounting information systems, production process and also internal control. The result achieved is an application model, which can assist production process activities, especially in documenting and storing data transaction and also generating reports in accordance with organization’s needs. The conclusion is the implementation of the accounting information systems application which can improve the XYZ’s systems performance and the current business processes. Therefore, it can obtain the required information in a timely and accurately.

Abstract: In order to deal well with the complexity in modeling a reducer’s production process, this paper proposes an Object-oriented Petri Net (OOPN) approach by combining object-oriented concept with Petri net theory. At first, the definitions of OOPN were given. Then, the procedure of modeling the production process with OOPN was described in detail, and the model analysis was conducted. Finally, the Flexsim software was used to simulate this model in order to find out the bottlenecks of the reducer’s process planning and some suggestions were proposed, which will lay a foundation on the optimization of its process planning.

Abstract: The paper deals with optimization of the production process in a selected company. The proposal of elimination of bottlenecks that were revealed in the analysis of the production process is described here in this paper. For clarity and zooming of the production process models were processed in a simulation software module from Siemens PLM Software - Tecnomatix Plant Simulation. Improvement suggestions will help to reduce the time of production operations, to improve product quality, to facilitate the work of the staff and to increase economic efficiency of production. The application of PLM software enables companies to analyze and easily develop manufacturing processes in the future, or to build new processing lines and departments [4]. It will help to optimize the current state of workplace and will allow easier data management throughout the life cycle, not just within this particular company, but throughout the corporation to which the enterprise belongs.