The Experts below are selected from a list of 11862 Experts worldwide ranked by ideXlab platform
Shun Jia - One of the best experts on this subject based on the ideXlab platform.
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An investigation into reducing the spindle acceleration energy consumption of machine tools
Journal of Cleaner Production, 2017Co-Authors: Jingxiang Lv, Wangchujun Tang, Yingfeng Zhang, Renzhong Tang, Ying Liu, Shun JiaAbstract:Machine tools are widely used in the manufacturing industry, and consume large amount of energy. Spindle acceleration appears frequently while machine tools are working. It produces power peak which is highly energy intensive. As a result, a considerable amount of energy is consumed by this acceleration during the use phase of machine tools. However, there is still a lack of understanding of the energy consumption of spindle acceleration. Therefore, this research aims to model the spindle acceleration energy consumption of computer numerical control (CNC) Lathes, and to investigate potential approaches to reduce this part of consumption. The proposed model is based on the principle of spindle motor control and includes the calculation of moment of inertia for spindle drive system. Experiments are carried out based on a CNC Lathe to validate the proposed model. The approaches for reducing the spindle acceleration energy consumption were developed. On the machine level, the approaches include avoiding unnecessary stopping and restarting of the spindle, shortening the acceleration time, lightweight design, proper use and maintenance of the spindle. On the system level, a machine tool selection criterion is developed for energy saving. Results show that the energy can be reduced by 10.6% to more than 50% using these approaches, most of which are practical and easy to implement.
Pomikálek Adam - One of the best experts on this subject based on the ideXlab platform.
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Mobile turning machining center with vertical workpiece axis
Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021Co-Authors: Pomikálek AdamAbstract:The subject of this diploma thesis is the conceptual design of a mobile Lathe centre with a vertical workpiece axis. First, a search in the field of mobile Lathes, stationary Lathes and methods of their transport is performed. Then, from the described transport machine options, the most suitable transport variant is selected, thanks to which variants of the mobile machine solution are created. Subsequently, the design of the winning variant is fully adapted to the method of transport using containers. Emphasis is placed on simple construction, maximum use of the transport packaging in the machine frame and easy assembly of the machine customer. For these reasons, the machine frame must consist of two containers. Finally, the assembly and adjustment of the machine tool are solved in combination with the verification of the functionality of the proposed concept
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Mobile turning machining center with vertical workpiece axis
Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021Co-Authors: Pomikálek AdamAbstract:Předmětem této diplomové práce je koncepční návrh mobilního soustružnického centra se svislou osou obrobku. Nejprve je provedena rešerše v oblasti mobilních soustruhů, stacionárních soustruhů a způsobů jejich přepravy. Poté je z popsaných možností přepravy obráběcího stroje vybrána nejvhodnější varianta přepravy, díky které vzniknou varianty řešení mobilního stroje. Následně je konstrukce vítězné varianty plně přizpůsobena způsobu přepravy pomocí kontejnerů. Kladen je důraz na jednoduchou konstrukci, maximální využití přepravního obalu v rámu stroje a snadnou montáž stroje u zákazníka. Z těchto důvodů rám stroje stává dvěma kontejnery. Nakonec je řešena montáž a seřízení obráběcího stroje spolu s ověřením funkčnosti navrženého konceptu.The subject of this diploma thesis is the conceptual design of a mobile Lathe centre with a vertical workpiece axis. First, a search in the field of mobile Lathes, stationary Lathes and methods of their transport is performed. Then, from the described transport machine options, the most suitable transport variant is selected, thanks to which variants of the mobile machine solution are created. Subsequently, the design of the winning variant is fully adapted to the method of transport using containers. Emphasis is placed on simple construction, maximum use of the transport packaging in the machine frame and easy assembly of the machine customer. For these reasons, the machine frame must consist of two containers. Finally, the assembly and adjustment of the machine tool are solved in combination with the verification of the functionality of the proposed concept.
Manfred Meyer - One of the best experts on this subject based on the ideXlab platform.
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using hierarchical constraint satisfaction for Lathe tool selection in a computer integrated manufacturing environment
Integrated Computer-aided Engineering, 1994Co-Authors: Manfred MeyerAbstract:We discuss how to treat the automatic selection of appropriate Lathe tools in a computer-aided process planning CAPP application as a constraint satisfaction problem CSP over hierarchically structured finite domains. Conceptually, it is straightforward to formulate Lathe-tool selection in terms of a CSP; however, the choice of constraint and domain representations and of the order in which the constraints are applied is nontrivial if a computationally tractable system design is to be achieved. Because the domains appearing in technical applications often can be modeled as a hierarchy, we investigate how constraint satisfaction algorithms can make use of this hierarchical structure. Moreover, many real-life problems are formulated in a way that no optimal solution can be found that satisfies all the given constraints. Therefore, to bring artificial intelligence technology into real-world applications it becomes important to be able to cope with conflicting constraints and relax the given CSP until a suboptimal solution can be found. For these reasons, the constraint system CONTAX has been developed, which incorporates an extended hierarchical arc-consistency algorithm together with discrete constraint relaxation and has been used to implement the Lathe-tool selection module of the ARC-TEC planning system.
Jingxiang Lv - One of the best experts on this subject based on the ideXlab platform.
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An investigation into reducing the spindle acceleration energy consumption of machine tools
Journal of Cleaner Production, 2017Co-Authors: Jingxiang Lv, Wangchujun Tang, Yingfeng Zhang, Renzhong Tang, Ying Liu, Shun JiaAbstract:Machine tools are widely used in the manufacturing industry, and consume large amount of energy. Spindle acceleration appears frequently while machine tools are working. It produces power peak which is highly energy intensive. As a result, a considerable amount of energy is consumed by this acceleration during the use phase of machine tools. However, there is still a lack of understanding of the energy consumption of spindle acceleration. Therefore, this research aims to model the spindle acceleration energy consumption of computer numerical control (CNC) Lathes, and to investigate potential approaches to reduce this part of consumption. The proposed model is based on the principle of spindle motor control and includes the calculation of moment of inertia for spindle drive system. Experiments are carried out based on a CNC Lathe to validate the proposed model. The approaches for reducing the spindle acceleration energy consumption were developed. On the machine level, the approaches include avoiding unnecessary stopping and restarting of the spindle, shortening the acceleration time, lightweight design, proper use and maintenance of the spindle. On the system level, a machine tool selection criterion is developed for energy saving. Results show that the energy can be reduced by 10.6% to more than 50% using these approaches, most of which are practical and easy to implement.
Hechuan Bian - One of the best experts on this subject based on the ideXlab platform.
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lightweight heavy duty cnc horizontal Lathe based on particle damping materials
Mechanical Systems and Signal Processing, 2021Co-Authors: Wangqiang Xiao, Hechuan BianAbstract:Abstract With the development of high-precision, high-speed, and green computer numerical controlled (CNC) machine tools, the advantages of lightweight versions of such tools are becoming increasingly obvious. Taking a ZN-XK2840 CNC Lathe as an example, in this study a lightweight design method is proposed for CNC machine tools based on particle damping technology. The static performance of conventional CNC machine tools is analyzed using a finite element method, and the wall thickness is optimized. Then, the dynamic characteristics of conventional CNC machine tools, such as the modal characteristics and harmonic response, are analyzed. The particle damping technology can effectively reduce the vibration of the machine structure in the vibration transmission path. In this paper, the discrete element dynamic method is used for the finite element model of a Lathe. Based on a traditional machine tool, the dynamic characteristics of the machine tool structure with a particle damper are analyzed. The Lathe with a particle damper is manufactured according to the lightweight design. The acceleration and displacement amplitudes of lightweight machine tools are smaller than those of traditional machine tools. The third-order natural frequency of lightweight CNC machine bed is increased by about 28.49%, and the vibration amplitude of harmonic response is reduced by 3.38%. Compared with the similar machine tools used in industry, the light CNC Lathe with particle damper reduces the weight by 50.8% on average.
