The reliable operation of high-speed wire rod finishing mills is crucial in the steel production enterprise.As complex system-level equipment,it is difficult for high-speed wire rod finishing mills to realize fault lo...The reliable operation of high-speed wire rod finishing mills is crucial in the steel production enterprise.As complex system-level equipment,it is difficult for high-speed wire rod finishing mills to realize fault location and real-time monitoring.To solve the above problems,an expert experience and data-driven-based hybrid fault diagnosis method for high-speed wire rod finishing mills is proposed in this paper.First,based on its mechanical structure,time and frequency domain analysis are improved in fault feature extraction.The approach of combining virtual value,peak value with kurtosis value index,is adopted in time domain analysis.Speed adjustment and side frequency analysis are proposed in frequency domain analysis to obtain accurate component characteristic frequency and its corresponding sideband.Then,according to time and frequency domain characteristics,fault location based on expert experience is proposed to get an accurate fault result.Finally,the proposed method is implemented in the equipment intelligent diagnosis system.By taking an equipment fault on site,for example,the effectiveness of the proposed method is illustrated in the system.展开更多
A nonionic waterborne polyurethane(WPU) was synthesized by the self-emulsification method using polyether diol(N220),isophorone diisocyanate(IPDI),trimethylolpropane poly(ethylene glycol monomethyl ether)(N120),1,4-bu...A nonionic waterborne polyurethane(WPU) was synthesized by the self-emulsification method using polyether diol(N220),isophorone diisocyanate(IPDI),trimethylolpropane poly(ethylene glycol monomethyl ether)(N120),1,4-butanediol(BDO) and trimethylolpropane(TMP) as the main materials.The effects of the NCO/OH ratio on the emulsion and film properties of NWPU were explored.The experimental results show that the NWPU prepared at an NCO/OH ratio of 1.1 has good emulsion stability and easy film formation,and the resultant film was elastic,soft,and transparent.The sample was used for wool finishing and the application performance was evaluated.When the NWPU dosage reached 40 g·L^(-1),the fabric area felt shrinkage rate reduced from 8.97% to 4.75%,the pilling rating raised from grade 2-3 to grade 4,and the whiteness value only decreased by 3.87%.展开更多
Antifouling textiles have been a hot research field in the last ten years.But lately,the European Union(EU)is expected to ban the production of C6 fluorinated water repellent,oil repellent and antifouling agents from ...Antifouling textiles have been a hot research field in the last ten years.But lately,the European Union(EU)is expected to ban the production of C6 fluorinated water repellent,oil repellent and antifouling agents from 2025,achieving complete fluoride-free antifouling measures.In the context of the current policy regulations on fluorine-free treatment in the waterproof,oil repellent and antifouling finishing field,this paper conducts a literature survey and comprehensive understanding of the current research status and trend in fluorine-free antifouling finishing.CiteSpace and Carrot2 are used to conduct a literature review of the latest papers in two databases,Web of Science(WoS)and China National Knowledge Infrastructure(CNKI).Firstly,the theoretical evolution and technical characteristics of textiles antifouling finishing technology are systematically discussed,and the technological differences of antifouling finishing textiles for different demands are compared.Secondly,the three main stages of the development of textile antifouling finishing technology and its corresponding finishing methods are summarized.Finally,three paths for the future development of fluorine-free antifouling finishing are prospected:construction of low surface energy,construction of uniform rough surface and low surface energy,and construction of multistage rough surface with low surface energy.To facilitate the transition of the industrial sector to fluorine-free,regulatory restrictions could be strengthened by enhancing the sampling inspection of apparel fabrics,detecting fluorine in wastewater discharges and restricting the production of fluorine-containing finishing agents by manufacturers.展开更多
Thin copper substrates with high accuracy are highly required in precision physical experiments.However,even using double-sided lapping,the flatness is still limited due to the accuracy of lapping plate,process vibrat...Thin copper substrates with high accuracy are highly required in precision physical experiments.However,even using double-sided lapping,the flatness is still limited due to the accuracy of lapping plate,process vibration and so on.Hence,as a subsequent process,this paper employs magnetorheological finishing(MRF)to further improve the flatness.Nevertheless,thin copper substrates,which are sensitive to the stress,deformed easily with uneven material removal on the surface.Therefore,MRF is adopted on machining thin copper substrate for the first time considering deformation induced by stress.A finite element model is established to evaluate the deformation by residual stress,and the results show that the deformation tends to be more serious with the increase of the material removal.According to the simulation results,the material removal is optimized considering both deformation and efficiency,and a series of experiments are conducted on aΦ100×2.8 mm workpiece to verify the simulation results.The experimental results show that the flatness is further improved from peak to valley(PV)6.6μm to PV 2.3μm with optimized processing parameters.Hence,the feasibility of magnetorheological finishing on thin copper substrate is demonstrated.展开更多
Gears are important mechanical parts for transmitting power and play an increasingly important role in the machinery industry.The electric vehicle industry developed rapidly and became a vital development field of the...Gears are important mechanical parts for transmitting power and play an increasingly important role in the machinery industry.The electric vehicle industry developed rapidly and became a vital development field of the automotive industry over the past few years.The conversion of energy increases the requirements for electric vehicle transmissions,which promotes the development of high-speed and low-noise transmission gear.This paper elaborates on the research progress of high-speed and low-noise gear finishing methods.Firstly,this review analyses the machining requirements,finishing,and specific machining technologies of high-speed and low-noise gears.The importance of gear grinding and honing in high-speed and low-noise gear machining is highlighted.Secondly,the applications of gear grinding and honing in gear modification,error compensation,and texture control are analyzed.Furthermore,the role of precision machining technology in improving gear performance is clarified.Finally,the design and processing methods of the modified tooth flank for gear modification are summarized.In addition,the influence of tooth surface texture on noise is described,and the texture change methods are explored.The well-known open problems of gear finishing are finally identified,and some new research interests are also pointed out.This review will provide valuable references for further research on gear finishing.展开更多
Batik fabric is an integral part of the traditional cloth culture of the Ghanaian traditional setting. However, the batik fabric has marginal usage due to its casual visual appearance. This studio practice seeks to ex...Batik fabric is an integral part of the traditional cloth culture of the Ghanaian traditional setting. However, the batik fabric has marginal usage due to its casual visual appearance. This studio practice seeks to explore the epiphanic revival in the use of metallic finishes on batik substrate to create an enhanced visual appearance with embellished aesthetic sensibilities and diversified use. The researchers adopted the studio-based approach of the qualitative design to manipulate handmade tools, techniques (collagraph) and the batik fabrics through experimentation to produce a glittering mercurial batik fabric which is typically an industrial practice. The studio practice took place at the Textile Design and Technology studio, Takoradi Technical University, Ghana. The traditional batik fabric was manipulated through fabric decoration techniques in accordance with studio-based practices. The Addie model was adopted as a methodological approach in the analysis, design, development, implementation, and evaluation processes of the experimentation processes of the study. Findings revealed that the hand techniques used in the production process for the metallic prints produced interesting accidentals finishes and effects that machine work cannot achieve, producing new discoveries of visual enhancements of traditional batik fabric. Traditional batiks became mercurial with glittery effects. The metallic prints on the fabric also changed its consumption pattern from mere casual fabric to classic and cosmopolitan fabric for varied uses suitable for wearable to non-wearable.展开更多
Monforts–which celebrates its 140th anniversary this year–continues to lead the field in finishing and coating technologies for technical textiles.The company is looking forward to many fruitful discussions on the s...Monforts–which celebrates its 140th anniversary this year–continues to lead the field in finishing and coating technologies for technical textiles.The company is looking forward to many fruitful discussions on the scope of existing and new processes and applications at the forthcoming Techtextil show in Frankfurt from April 23-26.展开更多
Textiles are one of the oldest industries in the world which has been manufacturing fabrics and materials needed for various purposes.However,the industry has been confronted with some problems regarding its pollution...Textiles are one of the oldest industries in the world which has been manufacturing fabrics and materials needed for various purposes.However,the industry has been confronted with some problems regarding its pollution;specifically the dyeing and finishing processes.As for the given issues,there has been a trend in recent years to come up with more environmentally friendly solutions.展开更多
Since 2005,Santex Rimar Group has had a close relationship with the Chinese textile market.With a keen understanding of the market,Santex Rimar Group invested in a factory in Shanghai and established Santex Rimar Shan...Since 2005,Santex Rimar Group has had a close relationship with the Chinese textile market.With a keen understanding of the market,Santex Rimar Group invested in a factory in Shanghai and established Santex Rimar Shanghai Textile Machinery Co.,Ltd.In 2020,on the occasion of the 15th anniversary of Santex Rimar Shanghai,the Group has once again stepped up its efforts in the Chinese market by renting a new 10,000 square meter factory to expand its production capacity to meet the growing scale of the company and the strong growth of Chinese market demand,and expand its production capacity in China.展开更多
In this study,a comprehensive rolling mill vibration test program was designed,including specific test conditions and a test system.The analysis of measured signals reveals the vibration response characteristics and t...In this study,a comprehensive rolling mill vibration test program was designed,including specific test conditions and a test system.The analysis of measured signals reveals the vibration response characteristics and their evolution at different gauge points in the finishing mill.This is particularly evident during abnormal rolling,where the signals highlight the characteristics of abnormal responses and vibration intensities.Abnormal vibrations during the rolling process mainly occur when the strip thickness is less than 2.5 mm,and at the rolling speed-up stage,the strong abnormal vibration occurs at each measuring point on the F2 transmission side.The maximum vibration intensity of the backup roll’s bearing seat is 17 mm/s.As the rolling progresses,the stress on the bolts changes.The strip thickness is negatively correlated with the peak values of bite and tail-flick impacts.The vibration characteristics vary with the strip thickness and the process state.展开更多
Building Information Modeling(BIM)technology can not only achieve project refinement management of the construction process based on a 3D model but also form a BIM-5D model based on the fusion of progress data and cos...Building Information Modeling(BIM)technology can not only achieve project refinement management of the construction process based on a 3D model but also form a BIM-5D model based on the fusion of progress data and cost data to achieve the dynamic control of the whole process of project cost.This paper discusses the application of BIM-5D in the cost control of finished house construction,aiming to provide technical reference for China’s finished house project units,so that they can master how to realize the construction of cost control system based on BIM,the monitoring of the key coefficients of the cost,corrective action,to ensure that the project cost deviation is within the controllable range,and to make an effective guarantee for the economic benefits of the project construction.展开更多
基金the National Key Research and Development Program of China under Grant 2021YFB3301300the National Natural Science Foundation of China under Grant 62203213+1 种基金the Natural Science Foundation of Jiangsu Province under Grant BK20220332the Open Project Program of Fujian Provincial Key Laboratory of Intelligent Identification and Control of Complex Dynamic System under Grant 2022A0004.
文摘The reliable operation of high-speed wire rod finishing mills is crucial in the steel production enterprise.As complex system-level equipment,it is difficult for high-speed wire rod finishing mills to realize fault location and real-time monitoring.To solve the above problems,an expert experience and data-driven-based hybrid fault diagnosis method for high-speed wire rod finishing mills is proposed in this paper.First,based on its mechanical structure,time and frequency domain analysis are improved in fault feature extraction.The approach of combining virtual value,peak value with kurtosis value index,is adopted in time domain analysis.Speed adjustment and side frequency analysis are proposed in frequency domain analysis to obtain accurate component characteristic frequency and its corresponding sideband.Then,according to time and frequency domain characteristics,fault location based on expert experience is proposed to get an accurate fault result.Finally,the proposed method is implemented in the equipment intelligent diagnosis system.By taking an equipment fault on site,for example,the effectiveness of the proposed method is illustrated in the system.
文摘A nonionic waterborne polyurethane(WPU) was synthesized by the self-emulsification method using polyether diol(N220),isophorone diisocyanate(IPDI),trimethylolpropane poly(ethylene glycol monomethyl ether)(N120),1,4-butanediol(BDO) and trimethylolpropane(TMP) as the main materials.The effects of the NCO/OH ratio on the emulsion and film properties of NWPU were explored.The experimental results show that the NWPU prepared at an NCO/OH ratio of 1.1 has good emulsion stability and easy film formation,and the resultant film was elastic,soft,and transparent.The sample was used for wool finishing and the application performance was evaluated.When the NWPU dosage reached 40 g·L^(-1),the fabric area felt shrinkage rate reduced from 8.97% to 4.75%,the pilling rating raised from grade 2-3 to grade 4,and the whiteness value only decreased by 3.87%.
基金Fundamental Research Funds for the Central Universities,China(No.2232021G-03)National Natural Science Foundation of China(Nos.72074132 and 71704165)。
文摘Antifouling textiles have been a hot research field in the last ten years.But lately,the European Union(EU)is expected to ban the production of C6 fluorinated water repellent,oil repellent and antifouling agents from 2025,achieving complete fluoride-free antifouling measures.In the context of the current policy regulations on fluorine-free treatment in the waterproof,oil repellent and antifouling finishing field,this paper conducts a literature survey and comprehensive understanding of the current research status and trend in fluorine-free antifouling finishing.CiteSpace and Carrot2 are used to conduct a literature review of the latest papers in two databases,Web of Science(WoS)and China National Knowledge Infrastructure(CNKI).Firstly,the theoretical evolution and technical characteristics of textiles antifouling finishing technology are systematically discussed,and the technological differences of antifouling finishing textiles for different demands are compared.Secondly,the three main stages of the development of textile antifouling finishing technology and its corresponding finishing methods are summarized.Finally,three paths for the future development of fluorine-free antifouling finishing are prospected:construction of low surface energy,construction of uniform rough surface and low surface energy,and construction of multistage rough surface with low surface energy.To facilitate the transition of the industrial sector to fluorine-free,regulatory restrictions could be strengthened by enhancing the sampling inspection of apparel fabrics,detecting fluorine in wastewater discharges and restricting the production of fluorine-containing finishing agents by manufacturers.
基金Supported by Science Challenge Project of China(Grant Nos.TZ2016006-0103,TZ2016006-0107-02)National Natural Science Foundation of China(Grant No.51975096)+1 种基金Liaoning Revitalization Talents Program of China(Grant No.XLYC1807230)National Key Research and Development Program of China(Grant No.2017YFA0701200)。
文摘Thin copper substrates with high accuracy are highly required in precision physical experiments.However,even using double-sided lapping,the flatness is still limited due to the accuracy of lapping plate,process vibration and so on.Hence,as a subsequent process,this paper employs magnetorheological finishing(MRF)to further improve the flatness.Nevertheless,thin copper substrates,which are sensitive to the stress,deformed easily with uneven material removal on the surface.Therefore,MRF is adopted on machining thin copper substrate for the first time considering deformation induced by stress.A finite element model is established to evaluate the deformation by residual stress,and the results show that the deformation tends to be more serious with the increase of the material removal.According to the simulation results,the material removal is optimized considering both deformation and efficiency,and a series of experiments are conducted on aΦ100×2.8 mm workpiece to verify the simulation results.The experimental results show that the flatness is further improved from peak to valley(PV)6.6μm to PV 2.3μm with optimized processing parameters.Hence,the feasibility of magnetorheological finishing on thin copper substrate is demonstrated.
基金Supported by National Natural Science Foundation of China(Grant Nos.52275483,52075142,and U22B2084)the Fundamental Research Funds for the Central Universities of China(Grant No.JZ2023HGPA0292).
文摘Gears are important mechanical parts for transmitting power and play an increasingly important role in the machinery industry.The electric vehicle industry developed rapidly and became a vital development field of the automotive industry over the past few years.The conversion of energy increases the requirements for electric vehicle transmissions,which promotes the development of high-speed and low-noise transmission gear.This paper elaborates on the research progress of high-speed and low-noise gear finishing methods.Firstly,this review analyses the machining requirements,finishing,and specific machining technologies of high-speed and low-noise gears.The importance of gear grinding and honing in high-speed and low-noise gear machining is highlighted.Secondly,the applications of gear grinding and honing in gear modification,error compensation,and texture control are analyzed.Furthermore,the role of precision machining technology in improving gear performance is clarified.Finally,the design and processing methods of the modified tooth flank for gear modification are summarized.In addition,the influence of tooth surface texture on noise is described,and the texture change methods are explored.The well-known open problems of gear finishing are finally identified,and some new research interests are also pointed out.This review will provide valuable references for further research on gear finishing.
文摘Batik fabric is an integral part of the traditional cloth culture of the Ghanaian traditional setting. However, the batik fabric has marginal usage due to its casual visual appearance. This studio practice seeks to explore the epiphanic revival in the use of metallic finishes on batik substrate to create an enhanced visual appearance with embellished aesthetic sensibilities and diversified use. The researchers adopted the studio-based approach of the qualitative design to manipulate handmade tools, techniques (collagraph) and the batik fabrics through experimentation to produce a glittering mercurial batik fabric which is typically an industrial practice. The studio practice took place at the Textile Design and Technology studio, Takoradi Technical University, Ghana. The traditional batik fabric was manipulated through fabric decoration techniques in accordance with studio-based practices. The Addie model was adopted as a methodological approach in the analysis, design, development, implementation, and evaluation processes of the experimentation processes of the study. Findings revealed that the hand techniques used in the production process for the metallic prints produced interesting accidentals finishes and effects that machine work cannot achieve, producing new discoveries of visual enhancements of traditional batik fabric. Traditional batiks became mercurial with glittery effects. The metallic prints on the fabric also changed its consumption pattern from mere casual fabric to classic and cosmopolitan fabric for varied uses suitable for wearable to non-wearable.
文摘Monforts–which celebrates its 140th anniversary this year–continues to lead the field in finishing and coating technologies for technical textiles.The company is looking forward to many fruitful discussions on the scope of existing and new processes and applications at the forthcoming Techtextil show in Frankfurt from April 23-26.
文摘Textiles are one of the oldest industries in the world which has been manufacturing fabrics and materials needed for various purposes.However,the industry has been confronted with some problems regarding its pollution;specifically the dyeing and finishing processes.As for the given issues,there has been a trend in recent years to come up with more environmentally friendly solutions.
文摘Since 2005,Santex Rimar Group has had a close relationship with the Chinese textile market.With a keen understanding of the market,Santex Rimar Group invested in a factory in Shanghai and established Santex Rimar Shanghai Textile Machinery Co.,Ltd.In 2020,on the occasion of the 15th anniversary of Santex Rimar Shanghai,the Group has once again stepped up its efforts in the Chinese market by renting a new 10,000 square meter factory to expand its production capacity to meet the growing scale of the company and the strong growth of Chinese market demand,and expand its production capacity in China.
文摘In this study,a comprehensive rolling mill vibration test program was designed,including specific test conditions and a test system.The analysis of measured signals reveals the vibration response characteristics and their evolution at different gauge points in the finishing mill.This is particularly evident during abnormal rolling,where the signals highlight the characteristics of abnormal responses and vibration intensities.Abnormal vibrations during the rolling process mainly occur when the strip thickness is less than 2.5 mm,and at the rolling speed-up stage,the strong abnormal vibration occurs at each measuring point on the F2 transmission side.The maximum vibration intensity of the backup roll’s bearing seat is 17 mm/s.As the rolling progresses,the stress on the bolts changes.The strip thickness is negatively correlated with the peak values of bite and tail-flick impacts.The vibration characteristics vary with the strip thickness and the process state.
基金University-level self-study project:Construction cost control research of finished house based on BIM-5D(Project No.2023xzky06)。
文摘Building Information Modeling(BIM)technology can not only achieve project refinement management of the construction process based on a 3D model but also form a BIM-5D model based on the fusion of progress data and cost data to achieve the dynamic control of the whole process of project cost.This paper discusses the application of BIM-5D in the cost control of finished house construction,aiming to provide technical reference for China’s finished house project units,so that they can master how to realize the construction of cost control system based on BIM,the monitoring of the key coefficients of the cost,corrective action,to ensure that the project cost deviation is within the controllable range,and to make an effective guarantee for the economic benefits of the project construction.
