The Experts below are selected from a list of 321 Experts worldwide ranked by ideXlab platform
Huang Xiao-long - One of the best experts on this subject based on the ideXlab platform.
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Dynamic simulation for a vibration processing equipment of Internal Thread formed by cold extrusion based on low frequency vibration
Journal of Vibration and Shock, 2012Co-Authors: Huang Xiao-longAbstract:Dynamic simulation was done for a vibration processing equipment of Internal Thread formed by cold extrusion based on low frequency vibration.The angular displacement of the vibration rod was used to study the angular displacement variation of the extrusion tap.Firstly,the dynamic simulation model of the vibration processing equipment was established.Secondly,through single factor tests and an orthogonal test,the effect law of three parameters on the angular displacement curve of the vibration rod was obtained.It was shown that: with increase in the height of the vibration plate relative to the rotation center of the vibration rod,the angular displacement amplitude of the vibration rod increases;with increase in the exciting force or the exciting frequency,the angular displacement amplitude of the vibration rod increases;the most significant effect on the angular displacement amplitude of the vibration rod is the exciting force,the second one is the exciting frequency,the third one is the height of the vibration plate relative to the rotation center of the vibration rod.
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Design of vibration processing equipment of Internal Thread formed by cold extrusion based on low frequency vibration
Ordnance Material Science and Engineering, 2011Co-Authors: Huang Xiao-longAbstract:A set of low frequency vibration processing equipment was designed for Internal Thread formed by cold extrusion.The processing equipment can improve the harsh environment in the extrusion area,reduce extrusion temperature and extrusion torque,make lubricant flow into the compress zone easily and reduce the broken of extrusion tap.Firstly,the overall design of the processing equipment was given and the design of the parts was given and described in detail;Secendly,through the Adams dynamics simulation of the processing equipment,vibration displacement curve of vibration plate and angular displacement curve of vibration pole were obtained.The curves show that the processing equipment can provide vibration on the extrusion tap,and realize vibration cold extrusion.
Yiming Rong - One of the best experts on this subject based on the ideXlab platform.
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Precision Measurement and Modeling of Quenching-Tempering Distortion in Low-Alloy Steel Components with Internal Threads
Journal of Materials Engineering and Performance, 2015Co-Authors: Zhenguo Nie, Gang Wang, Lin Yongliang, Yiming RongAbstract:Distortion resulting from heat treatment may cause serious problems for precision parts. A precision component made from 30CrNi3Mo steel with Internal Threads distorts slightly after quenching-tempering treatment. Such a small distortion results in serious difficulties in the subsequent assembly process. The distortion of the Internal Thread was measured using semi-destructive testing with video measuring system. Periodic wavy distortions emerged in the Internal Threads after heat treatment. Then both XRD analysis and hardness testing were conducted. A numerical simulation of the complete quenching-tempering process was conducted by DANTE, which is a set of user subroutines that link into the ABAQUS/STD solver. The results from the simulations are in good agreement with the measurement in distortion, microstructure field, and hardness. The effects of the technological parameters including quenchant, immersion orientation, and grooves were discussed on the basis of the simulation results. Finally, strategies to significantly decrease distortion and residual stress are proposed.
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Prediction of Distortion in Quenching-Tempering Processes for a SM256 Steel Component With Internal Thread
Volume 1: Processing, 2013Co-Authors: Zhenguo Nie, Yiming Rong, Gang WangAbstract:A steel component with Internal Thread has a few slight distortions when it undergoes quenching-tempering processes. These small distortions affect assembly severely in the precision engineering. Using FEA software with its user subroutines, the position and contour of distortions which will be confirmed by subsequent experimental measurement are simulated. This result reasonably explains the assemble difficulty in enterprise manufacturing, and then lots of suggestions are given for manufacturing improvements.Copyright © 2013 by ASME
Recai Kus - One of the best experts on this subject based on the ideXlab platform.
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Fractal geometry of Internal Thread surfaces manufactured by cutting tap and rolling tap
Manufacturing Letters, 2020Co-Authors: Ştefan Ţălu, Haci Sağlam, Miroslaw Bramowicz, Slawomir Kulesza, Recai KusAbstract:Abstract This study presents briefly the application of fractal geometry in Internal Threads surface characterization to reveal defect fine structures of the Internal Thread geometry caused by the manufacturing process. The surface texture characteristics of ten Internal Thread samples M12 × 1.75 of low carbon steel C1020, manufactured by cutting tap and rolling tap were analyzed and discussed through comparative analyses of the experimental data. The surface characteristics of samples were analyzed using scanning electron microscopy (SEM) and were found that surface texture characteristics (Str – surface anisotropy ratio and D – fractal dimension) are different for the Thread specimens.
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Experimental investigations of Threads surface integrity manufactured by cutting insert and with Internal Thread rolling head
CIRP Journal of Manufacturing Science and Technology, 2020Co-Authors: Ştefan Ţălu, Haci Sağlam, Recai Kus, Miroslaw Bramowicz, Slawomir KuleszaAbstract:Abstract The objective of this study was to provide insights for a deeply understanding of the Threads surface integrity manufactured by cutting tap, rolling tap, cutting insert and with Internal Thread rolling head, using the multiscale surface texture and fractal analysis in order to show the performance of the Internal rolling head by mechanical tests and also to highlight the advantages of rolling Internal Threads. A series of eight Internal Thread samples M80 × 1.5 manufactured by cutting insert and Internal Thread rolling head were analyzed on their surface texture characteristics and material properties. Surface characteristics of low carbon steel C1020 (equivalent to AISI 1020) were quantified by measuring four locations on regions of each sample. The Threads made by cutting inserts and Internal Thread rolling head were subjected to tensile test and it was found that the average tensile load of Threads made by Internal rolling head is higher with 20% than the Threads made by cutting insert. Furthermore, the Internal Thread sections of samples were analyzed using an optical projector by comparing the appearance of failed Threads at low magnification to known failure modes, as well as scanning electron microscopy (SEM) for surface material characterization. It was found that it can be discriminate between the Thread surface regions of samples manufactured by cutting insert and with Internal Thread rolling head, using area-scale analysis and surface texture characteristics. The surface micro-morphology results can be applied in studies about improving the lifetime of similar rolled Threads and for mathematical modelling of lubrication processes between tool and workpiece.
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Performance of Internal Thread Rolling Head and The Mechanical Properties of Rolled Thread
2011Co-Authors: Haci Sağlam, Recai KusAbstract:Thread rolling process is widely used in external Thread manufacturing, while limited use in Internal Thread. In this paper the mechanical properties of Thread formed by the Internal Thread rolling head developed was investigated and their advantages were introduced. Cold forming plastically and permanently displaces the component material instead of cutting away material. With this model accurately dimensioned Threads and significantly improved surfaces have been obtained. Therefore, the factors for Internal Thread rolling head were determined and the rolling head was tested successfully. The Thread samples made by cutting and rolling were subjected to tensile test and their results were compared. As a result, the tensile load capacity of the rolled Thread is found higher than the Thread made by cutting method.
Hong Miao - One of the best experts on this subject based on the ideXlab platform.
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Process Online Monitoring on Cold Extrusion of Internal Thread in High-strength Steel
Manufacturing Technology, 2018Co-Authors: Hong Miao, Zhang Shanwen, Yifu Jin, Shan Xiang, Dunwen ZuoAbstract:In order to solve the problems of data collection, data storage, artificial neural networks, real-time display of images, real-time monitoring of current status and recurrence of historical data, online monitoring system of cold extrusion of Internal Thread process is designed by LabVIEW8.5. The time-domain analysis and time-frequency-domain analysis are carried out for the torque signal, temperature signal, vibration signal, acoustic emission signal and transmitted signal. The research shows that: this online monitoring system can forecast processing status accurately, raise real-time alarm to replace or re-install the Thread forming tap, accordingly avoids effectively the wreckage of Thread forming tap and the scrap of work pieces; the fault recognition rate reaches 97%. And the practical model of online monitoring system for cold extrusion of Internal Thread process can be used to monitor working process.
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Numerical Simulation and Experimental Research on Cold Form Tapping Process of Internal Thread
Manufacturing Technology, 2017Co-Authors: Hong Miao, Jing Yun Yuan, Qing Mei, Zhang Shanwen, Yifu Jin, Dunwen ZuoAbstract:During the cold form tapping process of Internal Thread in high-strength-steel, the effect of bottom-diameter, extrusion speed, friction factor and extrusion times on extrusion temperature and torque have contributed to tap wear, break and manufacturing quality. The process of cold form tapping of Internal Thread for Q460 high-strength-steel is studied through numerical simulation and experimental research. The effect of different processing parameters, including the bottom-diameter, extrusion speed, friction factor and extrusion times, on temperature and torque during the process of cold form tapping of Internal Thread are analyzed to provide new basis for further choosing optimized processing parameters. The simulation and test results show that obvious stress-strain and higher temperature zone focuses on working area during the cold form tapping of Internal Thread for Q460 high strength steel. The simulation value is slightly lower than the measured value and the error is no more than 20%. With the increase of bottom-diameter and extrusion times and the reduction of extrusion speed and friction factor, the extrusion temperature and torque will decrease.
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Present Situation of the Anti-Fatigue Processing of High-Strength Steel Internal Thread Based on Cold Extrusion Technology: A Review
Chinese Journal of Mechanical Engineering, 2017Co-Authors: Hong Miao, Zhang Shanwen, Jiang Cheng, Liu Sixing, Zhang YanjunAbstract:The adoption of cold-extrusion forming for Internal Thread net forming becomes an important component of anti-fatigue processing with the development of Internal Thread processing towards high performance, low cost and low energy consumption. It has vast application foreground in the field of aviation, spaceflight, high speed train and etc. The Internal Thread processing and anti-fatigue manufacture technology are summarized. In terms of the perspective of processing quality and fatigue serving life, the advantages and disadvantages of the processing methods from are compared. The Internal Thread cold-extrusion processing technology is investigated for the purpose of improving the anti-fatigue serving life of Internal Thread. The superiorities of the plastic deformation law and surface integrity of the metal layer in the course of cold extrusion for improving its stability and economy are summed up. The proposed research forecasts the development tendency of the Internal Thread anti-fatigue manufacturing technology.
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Research on the Decision Support System for Cold Extrusion Process of Internal Thread
Key Engineering Materials, 2016Co-Authors: Hong Miao, Jing Yun Yuan, Zai Xiang ZhengAbstract:This paper established the model base, knowledge base, application base and test base for the cold extrusion process of Internal Thread and developed decision support system which realized the centralized management of related information for cold extrusion process of Internal Thread, maintained the consistency of data in real time and enforced the degree of information sharing. By using of the decision support system, expert system, intelligent inference technology and depending on the application requirements of the system, the overall structure of the decision support system for cold extrusion process of Internal Thread was established based on J2EE technology. Two accessorial decision-making methods of hybrid forecasting and application modification facilitated modeling the system business. Three-dimensional frame structure was used to represent the application example of the Internal Thread by cold extrusion process and to achieve the application type, information scalability of Internal Thread by cold extrusion process. Hybrid fast predicting mechanism which was the dynamic integration of Internal Thread by cold extrusion process knowledge and instance inference was applied to seek the optimal degree of Internal Thread by cold extrusion process.
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Low cycle fatigue and strengthening mechanism of cold extruded large diameter Internal Thread of Q460 steel
Chinese Journal of Mechanical Engineering, 2016Co-Authors: Hong Miao, Jing Yun Yuan, Qing Mei, Yifu Jin, Zheng Zaixiang, Dunwen ZuoAbstract:large diameter Internal Thread of high-strength steel(LDITHSS) manufactured by traditional methods always has the problems of low accuracy and short life. Compared with traditional methods, the cold extrusion process is an effective means to realize higher accuracy and longer life. The low-cycle fatigue properties of LDITHSS are obtained by experiments, and the initiation and propagation of fatigue cracks are observed by scanning electron microscope(SEM). Based on the mechanical properties, surface microstructure and residual stress, the strengthening mechanism of cold extruded large diameter Internal Thread(LDIT) is discussed. The results show that new grains or sub-grains can be formed on the surface of LDIT due to grain segmentation and grain refinement during cold extrusion. The fibrous structures appear as elongated and streamlined along the normal direction of the tooth surface which leads to residual compressive stress on the extruded surface. The maximum tension stress of LDIT after cold extrusion is found to be 192.55 kN. Under low stress cycling, the yield stress on Thread increases, the propagation rate of crack reduces, the fatigue life is thus improved significantly with decreasing surface grain diameter and the average fatigue life increases to 45.539×103 cycle when the maximum applied load decreases to 120 kN. The low cycle fatigue and strengthening mechanism of cold extruded LDIT revealed by this research has significant importance to promote application of Internal Thread by cold extrusion processing.
Slawomir Kulesza - One of the best experts on this subject based on the ideXlab platform.
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Experimental investigations of Threads surface integrity manufactured by cutting insert and with Internal Thread rolling head
CIRP Journal of Manufacturing Science and Technology, 2020Co-Authors: Ştefan Ţălu, Haci Sağlam, Recai Kus, Miroslaw Bramowicz, Slawomir KuleszaAbstract:Abstract The objective of this study was to provide insights for a deeply understanding of the Threads surface integrity manufactured by cutting tap, rolling tap, cutting insert and with Internal Thread rolling head, using the multiscale surface texture and fractal analysis in order to show the performance of the Internal rolling head by mechanical tests and also to highlight the advantages of rolling Internal Threads. A series of eight Internal Thread samples M80 × 1.5 manufactured by cutting insert and Internal Thread rolling head were analyzed on their surface texture characteristics and material properties. Surface characteristics of low carbon steel C1020 (equivalent to AISI 1020) were quantified by measuring four locations on regions of each sample. The Threads made by cutting inserts and Internal Thread rolling head were subjected to tensile test and it was found that the average tensile load of Threads made by Internal rolling head is higher with 20% than the Threads made by cutting insert. Furthermore, the Internal Thread sections of samples were analyzed using an optical projector by comparing the appearance of failed Threads at low magnification to known failure modes, as well as scanning electron microscopy (SEM) for surface material characterization. It was found that it can be discriminate between the Thread surface regions of samples manufactured by cutting insert and with Internal Thread rolling head, using area-scale analysis and surface texture characteristics. The surface micro-morphology results can be applied in studies about improving the lifetime of similar rolled Threads and for mathematical modelling of lubrication processes between tool and workpiece.
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Fractal geometry of Internal Thread surfaces manufactured by cutting tap and rolling tap
Manufacturing Letters, 2020Co-Authors: Ştefan Ţălu, Haci Sağlam, Miroslaw Bramowicz, Slawomir Kulesza, Recai KusAbstract:Abstract This study presents briefly the application of fractal geometry in Internal Threads surface characterization to reveal defect fine structures of the Internal Thread geometry caused by the manufacturing process. The surface texture characteristics of ten Internal Thread samples M12 × 1.75 of low carbon steel C1020, manufactured by cutting tap and rolling tap were analyzed and discussed through comparative analyses of the experimental data. The surface characteristics of samples were analyzed using scanning electron microscopy (SEM) and were found that surface texture characteristics (Str – surface anisotropy ratio and D – fractal dimension) are different for the Thread specimens.