Development Of Manufacturing Technology Research Articles

ADDITIVE MANUFACTURE. APPLICATIONS IN THE PETROLEUM AND PETROCHEMICAL INDUSTRY

In the current stage of technology development, there are more and more important changes related to the development of existing manufacturing technologies and the emergence of new technologies. The paper analyses the current state of development of additive manufacturing technologies, with possible applications in the oil industry. This new type of technology has transformed, in the short term, and will revolutionize, in the long term, the production methods, in any field of work.

Многоцелевое конвертирование судовых дизелей при создании поршневых мотор-компрессорных агрегатов

This paper present an assessment of the energy efficiency of various combinations of piston stages of an internal combustion engine, a compressor, and a Rankine engine as part of piston motor-compressor units based on modernized marine diesel engines. An eight-cylinder single-row diesel engine 8Ch23/30-1 is chosen as the object of research, the base of which is used as a single platform for creating powertechnology units for various purposes and power. The proposed variants for converting the original engine allow, with minimal costs for the development of design and manufacturing technology, to create gas engine compressor units with reduced fuel consumption and improved weight and size characteristics in comparison with the known mobile compressor stations driven by diesel internal combustion engines. In the paper, on the basis of the developed mathematical models of working processes, the possibility of joint operation of diesel cylinders with piston expanders of the Rankine cycle and one or more stages of a piston compressor is assessed. Various possible combinations of diesel cylinders, compressor cylinders and expander cylinders are considered, as well as the dependences of engine power and compressor performance depending on the number of compressor stages and the number of diesel power cylinders used.

Development of Continuous Manufacturing Technology for Solid Dosage form in Eisai

Development of Continuous Manufacturing Technology for Solid Dosage form in Eisai

Real-Time Communication Model Based on OPC UA Wireless Network for Intelligent Production Line

With the continuous development of intelligent manufacturing technology, the intelligent production line for the Industrial Internet of Things occupies an important position in the field of industrial intelligence. OPC UA is a standard for communication data exchange between intelligent production line devices. OPC UA can establish a unified information model for production line devices and improve the connectivity of heterogeneous networks. However, in industrial wireless network application scenarios, there are various types of sensing information and large amounts of data to be transmitted. Each type of data has different requirements for real-time. The traditional OPC UA communication method is difficult to achieve real-time and reliable transmission in intelligent production lines and can’t meet the transmission requirements of time-sensitive data. In this paper, we propose a real-time communication model of the OPC UA wireless network for intelligent production lines (UAMPDS). IEEE 802.15.4e TSCH is used as the wireless communication infrastructure, and OPC UA protocols are fused to this model. Meanwhile, we design a load-aware time-slot scheduling algorithm to dynamically allocate and schedule time slots according to the network topology and traffic load of each node. We also implement a dynamic preemptive resource scheduling strategy based on service differentiation to ensure real-time transmission of time-sensitive data. The experimental results show that this model achieves differentiated services based on data with different latency tolerance and effectively reduces the transmission latency of real-time service data under the constrained network resources. It can avoid the starvation phenomenon of low priority queues, and improves the overall quality of service of intelligent production line communication networks.

The fuzzy integrated TOPSIS economy ranking (FITER) model for manufacturing technology development in China

With knowledge perspective of industrial technology, in this paper we propose fast ranking score decision making model based on Fuzzy integrated TOPSIS approach to determine economic growth rate of manufacturing industry in China. This research focuses on driving effects of China’s productive service industry on manufacturing technology innovation. The research results show that the manufacturer service industry takes a high level of information diffusion for the manufacturing industry. It transmits a large amount of diverse information through the unconstrained relationship with the manufacturing industry, thereby forming the economic network with proposed Fuzzy integrated TOPSIS economy ranking (FITER) model and improve the development level of the manufacturing industry. We evaluate the performance of proposed FITER model by comparing ranking score of different manufacturing industry with different existing decision making mode and demonstrate that proposed model represent best ranking score in comparison to existing approach. Result from data analysis motivates driving effect of production services on the technological innovation of manufacturing and sub-sectors. It is found that the innovation and technological advancement in the production industry of services takes drive the overall expansion level of the business industry, as well as make the manufacturing industry the strongest.

A review of production technologies and materials for manufacturing of cardiovascular stents

The purpose of this article is to give a general overview of the production technologies of stents with consideration of their design and materials. Since the beginning of the use of stents in medicine for atherosclerosis treatment, their development has changed rapidly. Various stents have also been developed with the development of materials science, treatment techniques and new manufacturing processes. In this way the development has shifted from the initial bare-metal stents (BMS), to drug-eluting stents (DES) and bio-resorbable stents (BRS), which are made of biodegradable polymers or metals. Various studies agree that it will be necessary to further review the experimentally obtained material properties with analytical and numerical studies. Here, the computational modelling (Finite element analysis - FEA and Computational fluid dynamics - CFD) was found as a valuable tool when evaluating stent mechanics and optimizing stent design. The development of the stent manufacturing technologies has also changed and been supplemented over the years. Nowadays, 3D printing could be an exciting manufacturing method to produce polymeric bio-materials, suitable for the latest generation of bio-degradable stents applications.

Recent Advances in Design and Actuation of Continuum Robots for Medical Applications

Traditional rigid robot application in the medical field is limited due to the limited degrees of freedom caused by their material and structure. Inspired by trunk, tentacles, and snakes, continuum robot (CR) could traverse confined space, manipulate objects in complex environment, and conform to curvilinear paths in space. The continuum robot has broad prospect in surgery due to its high dexterity, which can reach circuitous areas of the body and perform precision surgery. Recently, many efforts have been done by researchers to improve the design and actuation methods of continuum robots. Several continuum robots have been applied in clinic surgical interventions and demonstrated superiorities to conventional rigid-link robots. In this paper, we provide an overview of the current development of continuum robots, including the design principles, actuation methods, application prospect, limitations, and challenge. And we also provide perspective for the future development. We hope that with the development of material science, Engineering ethics, and manufacture technology, new methods can be applied to manufacture continuum robots for specific surgical procedures.

Design concept to facilitate the positioning of a custom abutment on an implant

With the development of computer-aided design and computer-aided manufacturing (CAD-CAM) technology, implant abutments have been fabricated with nearly unlimited design options.1,2 When an implant indexing device has not been fabricated or is not available, additional chair time for placing a custom abutment on a hexagonal connection implant is needed, especially for multiple implant restorations, as the abutment can be positioned in 6 different orientations.3,4 This article describes a design concept for fabricating a custom abutment with a mark.

Peridynamic formulation for higher order functionally graded beams

With the development of advanced manufacturing technologies, the importance of functionally graded materials is increasing due to their advantages over widely used traditional composites. In this study, a new higher order functionally graded beam formulation is presented by using peridynamics. Both thin and thick beams can be analysed by using the new formulation. Moreover, there is no need to use a shear correction factor. Euler-Lagrange equations and Taylor's expansion are utilised to derive the governing equations. Several benchmark problems are studied to validate the newly developed higher order functionally graded beam formulation by considering different boundary conditions including clamped, simply supported and mixed boundary conditions. Peridynamic results are compared against finite element analysis results. According to the comparison, peridynamic and finite element analysis results agree very well with each other.

Research on Anti-interference Control of Hydrostatic Guide Rail's Oil Film Thickness

With the rapid development of modern manufacturing technology, people have higher and higher requirements for the quality of mechanical products, and the precision of machine tools for processing mechanical products has gradually increased. Therefore, the development of static pressure guides is particularly important for precision processing industries. The load on the guide rail has an important effect on the thickness of the oil film, and the stability of the oil film thickness directly determines the accuracy of processing. In order to obtain the best control method for the thickness of the oil film, the dimensions of the hydrostatic guide rails and the three-dimensional model of the guide rails were designed and calculated in this paper, and the fuel supply method of the guide rails was determined. The simulation model of the oil film was established and imported from the AMESim software into the FLUENT software to obtain the pressure, velocity, and temperature distribution maps of the oil film. And the pressure distribution data was processed after summarizing. Combined with the relevant mathematical models, the mathematical model of the oil film thickness was finally obtained. Then the Simulink software was used to analyze and the PID control was introduced for comparative analysis. The DOB anti-interference control theory was introduced, and the anti-interference control algorithm was improved. The anti-interference algorithm adapted to the oil film thickness control complete the programming of the modules of the interference controller. The anti-interference control section was created in the Simulink software, and the system of the DOB module was finally completed after packaging. In order to verify the method in t his paper, a static pressure rail test bench was set up, and relevant detection tests were completed. The results of the above studies showed that the control performance was greatly improved after introducing the anti-interference algorithm adapted to the oil film control system.

Background investigation on the permissible additional rail stresses due to track/bridge interaction

The permissible additional rail stresses are essential when verifying the track/bridge interaction. Firstly, the current verification values of the German codes and other international codes (Eurocode, UIC, Spain, Italy and China) are introduced in this work. Subsequently, a detailed explanation of track/bridge interaction including the decisive historical investigations, rail stresses and permissible additional stresses is given. Afterwards, the background and related recent investigations on the limitation of additional permissible rail compressive stress (92 MPa/72 MPa) and tensile stress (92 MPa) due to track/bridge interaction in Eurocodes and German codes are comprehensively explained. It can be concluded that these permissible additional stress limitations are no longer dependable with the rapid development of high-speed railway and rail manufacturing technologies. New investigations are necessary to be carried out.

Mechanical performance of additive manufactured shoe midsole designed using variable-dimension helical springs

The mechanical properties such as energy absorption, crushing behavior, and strength-to-weight ratio of graded density structures are significantly better when compared with uniform density counterparts. Graded density structures have been widely investigated due to recent developments in additive manufacturing (AM) technology, which can easily manufacture complex geometries. The study explores the significance of variable-dimension helical spring (VDS) to be used in shoe midsole to improve the stiffness, energy absorption, and energy return. Two novel shoe midsoles are designed using the variable-dimension helical springs and their performance was compared with a third shoe midsole designed using uniform-dimension helical spring (UDS). Variable-dimension shoe midsoles were designed according to the actual pressure distribution applied by the human foot on the midsole. The Multijet fusion AM process was employed for the fabrication of all shoe midsole samples. It is revealed that despite the same mass and bounding box, variable-dimension midsoles have significantly improved mechanical properties compared to uniform-dimension midsole. It is found that the VDS midsole has sixfolds higher force-bearing capacity, and has a lower permanent material setting phenomena when compared to UDS midsole. Moreover, a higher (45%) distortion was found in the UDS midsole after the loading-unloading experiment when compared to the VDS midsole (24%) distortion. A further comparison of the VDS midsole was carried out with the commercially available wave spring-based midsole. Despite about 2-fold higher weight of the wave spring–based midsole, the VDS polymer midsole has higher mechanical properties found in terms of flexibility and force-bearing capacity. Finally, it is concluded that the VDS structure of the midsole can enhance the mechanical properties such as force-bearing capacity, flexibility, and stability with a higher strength-to-weight ratio. This study also proves the feasibility of design and AM of customer-specific shoe midsole.

A knowledge base model of integral impeller milling process based on Teamcenter platform

As an important foundation of integral impeller milling manufacturing, integral impeller milling process knowledge plays a significant role in design and production. With the rapid development of aerospace industry and intelligent manufacturing technology, it is very urgent to construct knowledge base of milling process for typical integral impeller structure. Based on the analysis of typical milling process knowledge of integral impeller, the study proposes a model of knowledge base of milling process of integral impeller based on Teamcenter platform, which can effectively realize the sharing and reuse of knowledge of integral impeller milling process.

Numerical analysis of the flow and heat transfer characteristics in serpentine microchannel with variable bend amplitude

PurposeThis study aims to propose the increase of heat dissipation requirements of modern electronic equipment and the fast development of micro-scale manufacturing technologies. The heat transfer mechanism is studied in-depth, especially for its pattern of secondary flow caused by the repeated inversion of centrifugal force. Effects of η on the frictional pressure drop and average Nusselt number are studied and the performance of such microchannel heat sink with various bend amplitudes is comprehensively evaluated. These results can provide important insight into the optimal design of this novel design configuration for microelectronics cooling.Design/methodology/approachA three-dimensional model based on the finite volume approach and SIMPLEC algorithm is performed to test an innovative serpentine microchannel, which behaves differently from conventional serpentine microchannel due to the significant effect of centrifugal force inversion.FindingsThe effect of centrifugal force significantly influences the flow and thermal fields which are responsible for the enhancement in heat transfer coefficient. The number, size and intensity of vortices increase with increasing Re, and the vortices are reformed at every change of the geometry in a periodic fashion. The serpentine microchannel studies more effectively at larger bend amplitude. Pressure fluctuations and temperature variation are greater with increasing bend amplitude.Practical implicationsSeveral techniques have been developed to augment single-phase convective heat transfer in channels. One technique is to use a serpentine channel that enhances the heat transfer due to flow mixing and periodic interruption of thermal boundary layers. This technique has been applied to micro-heat exchangers, thermal regenerators and mini/microreactors.Social implicationsThe optimal design of this novel design configuration for microelectronics cooling can be attained. It will become an effective cooling technology for solving the increasing of heat dissipation requirements of modern electronic equipment.Originality/valueThe flow and heat transfer characteristics are first presented for the circular serpentine microchannel made up of alternate U-bends without interposed straight segments. The present study first examines the effect of such centrifugal force inversion on velocity contour, pressure distribution and temperature distribution. The patterns of secondary flow along the flow passage caused by the repeated inversion of centrifugal force are further studied in depth. The effect of bend amplitude on the flow and heat transfer is explored and the performance of such microchannel heat sink has been comprehensively evaluated.

Influence of wire-arc additive manufacturing path planning strategy on the residual stress status in one single buildup layer

In recent years, the significant residual stress in the wire-arc additively manufactured components has been continuously one of the most concerning issues for the further development of the wire-arc additive manufacturing (WAAM) technology. Although many pre/post processing methods have been proved capable of modifying the residual stress, few works have been conducted to reduce the residual stress using appropriate path planning. In the present research, a WAAM path planning strategy is developed combining both zigzag and contour-offset methods, which aims to obtain a single WAAM deposition buildup layer with both optimal outline accuracy and residual stress status. The path planning and residual stress measurement processes have been carefully designed to acquire reasonable results. According to the residual stress results measured using X-ray diffraction method, the arc deposits finished with more contour-offset paths contain smaller tensile residual stresses, which is due to the hooping function of the outer contour deposit path to the inner deposit. Therefore, it can be concluded that the offsetting of the external contours before zigzag filling the internal dimensions is beneficial to both the residual stress distribution and shape outline accuracy of the WAAM buildup layer.

Research on the Innovation of Additive Manufacturing Technology in Contemporary Industry Development

Additive manufacturing technology has entered our daily life, seemingly omnipotent. At the same time, a considerable proportion of scholars believe that this technology can not replace the traditional manufacturing industry. How to promote the development of additive manufacturing technology and make it meet the market demand quickly is the purpose of this study. This paper analyzes the problems of additive manufacturing technology from the aspects of “technology readiness index”, “driving force and bottleneck”, “innovation demand” and “obstacles to commercial promotion”, and puts forward solutions.

Using AutoCAD Software to Assist in Analyzing the Application of Modern Machinery Manufacturing Technology and Processing Technology

With the renewal and development of modern mechanical manufacturing technology, traditional mechanical manufacturing technology cannot meet the needs of the industry. To promote the development of modern mechanical processing industry, we need to continuously improve the level of mechanical manufacturing technology and processing technology. AutoCAD software, as a computer-aided software, is often used for two-dimensional drawing and basic three-dimensional design. It is widely used in modern machinery manufacturing and processing. This paper first introduces the characteristics of modern mechanical manufacturing technology and processing technology, and then uses AutoCAD software to assist in analyzing the current situation and practical application of modern mechanical manufacturing technology and processing technology.

Additive Manufacturing of Piezoelectric Materials

AbstractAdditive manufacturing technology has attracted unprecedented attention in industry because it provides infinite possibilities for rapid prototyping and enormous potential and opportunities for the production of electronic devices of various complex shapes. This paper focuses on the progress of additive manufacturing of piezoelectric materials in recent years, summarizing the advantages of additive manufacturing technology and its technical impact on the production of piezoelectric materials. It identifies the likely future research development direction of additive manufacturing technology, as well as the limitations of the current additive manufacturing technology in the context of piezoelectric materials. First, the various processes involved in additive manufacturing of piezoelectric devices and the impact of various processes on device performance are systematically summarized. Then, the development of additive manufacturing technology and slurry preparation of piezoelectric ceramic materials, piezoelectric polymer materials, and piezoelectric composites are introduced. Finally, the technical difficulties and potential research directions associated with additive manufacturing of piezoelectric materials are discussed. With the continuous development of additive manufacturing technology and piezoelectric materials, additive manufacturing of piezoelectric devices with excellent performance, high energy storage density, and high electromechanical conversion efficiency will be applied in a wider range of fields in the future.

Development of Double Pancake Manufacturing Technology for ITER TF Coil

Development of Double Pancake Manufacturing Technology for ITER TF Coil

Diamond-reinforced cutting tools using laser-based additive manufacturing.

Production-volume and cost requirements currently limit machine tool manufacturers' ability to produce application-specific tooling with traditional methods, motivating the development of innovative manufacturing technologies. To this end, we detail a manufacturing framework for the design and production of application-specific cutting tools based on industry standard tungsten carbide-cobalt (WC-Co)-based "carbide" cutting materials using additive manufacturing (AM). Herein, novel diamond-reinforced carbide structures were designed and manufactured via AM and subsequently tested in comparison to current commercial products that are traditionally-processed. The resulting diamond-reinforced composites were free from large scale cracking and maintained microstructures with multiple reinforcing phases. Diamond incorporation had a remarkable effect on the processing, microstructure, and machining performance of the WC-Co based material in comparison to a commercial carbide cutting tool of similar composition as well as the base WC-Co matrix. Detailed microstructure and phase analysis, as well as machining experiments, demonstrate the ability to exploit laser-based directed energy deposition (DED)-based AM to create multifunctional cutting tools that can be designed to meet ever-increasing manufacturing demands across many industries.