Pub Date : 2023-07-23DOI: 10.1177/09544054231188992
Debolina Sen, Surjya K. Pal, S. Panda
Tubular components are challenging to weld using friction stir welding (FSW) process due to its curvature. In the present work, a novel strategy involving concave shoulder tool with three different concavities (3°, 6° and 9°) coupled with double pass was devised to fabricate longitudinal FSWed tubes of AA5083-O. An increase in concavity resulted in formation of flash and thinning of weld zone (WZ) due to excessive heat generation caused by enhanced tool contact with tube curvature. The flash generation led to the formation of porosity in the WZ. The tool with 6° concavity resulted in spherical pores whereas long and needle shaped pores were witnessed in case of 9° concave tool. However, negligible pores were observed with 3° concave tool leading to excellent WZ strength. Therefore, it was inferred that concave shoulder tool with small concavity along with double pass was suitable for welding tubes using FSW.
{"title":"Effect of tool concavity on flash formation during fabrication of tubes through friction stir welding","authors":"Debolina Sen, Surjya K. Pal, S. Panda","doi":"10.1177/09544054231188992","DOIUrl":"https://doi.org/10.1177/09544054231188992","url":null,"abstract":"Tubular components are challenging to weld using friction stir welding (FSW) process due to its curvature. In the present work, a novel strategy involving concave shoulder tool with three different concavities (3°, 6° and 9°) coupled with double pass was devised to fabricate longitudinal FSWed tubes of AA5083-O. An increase in concavity resulted in formation of flash and thinning of weld zone (WZ) due to excessive heat generation caused by enhanced tool contact with tube curvature. The flash generation led to the formation of porosity in the WZ. The tool with 6° concavity resulted in spherical pores whereas long and needle shaped pores were witnessed in case of 9° concave tool. However, negligible pores were observed with 3° concave tool leading to excellent WZ strength. Therefore, it was inferred that concave shoulder tool with small concavity along with double pass was suitable for welding tubes using FSW.","PeriodicalId":20663,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture","volume":"7 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2023-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78702904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-23DOI: 10.1177/09544054231188815
Chao Chen, Xingang Zhang
The increasing application of novel and high-performance metallic materials poses new challenges to the problem of joining sheets. Clinching technology has become the common means of green joining in the automotive industry. The application of conventional clinching to visible surfaces in automobiles is limited by the external protrusion of the clinched joint. It cannot be ignored the important role of the blank holder in controlling the material flow in the clinching process. In this study, the joint quality of Al5052 sheets for the flat clinch-rivet process was investigated by experimental methods. A flat bottom die and rivets were used to form joints under different blank holder structures. Geometric parameters, static strength, failure modes, and energy absorption were analyzed. The results indicate the flat clinch-riveted joints created by the conical stepped blank holder have the advantages of no indentation, high energy absorption, and high joint strength. The flat clinch-rivet process should preferably use a conical stepped blank holder.
{"title":"Investigation of the flat clinch–rivet process with different blank holder structures","authors":"Chao Chen, Xingang Zhang","doi":"10.1177/09544054231188815","DOIUrl":"https://doi.org/10.1177/09544054231188815","url":null,"abstract":"The increasing application of novel and high-performance metallic materials poses new challenges to the problem of joining sheets. Clinching technology has become the common means of green joining in the automotive industry. The application of conventional clinching to visible surfaces in automobiles is limited by the external protrusion of the clinched joint. It cannot be ignored the important role of the blank holder in controlling the material flow in the clinching process. In this study, the joint quality of Al5052 sheets for the flat clinch-rivet process was investigated by experimental methods. A flat bottom die and rivets were used to form joints under different blank holder structures. Geometric parameters, static strength, failure modes, and energy absorption were analyzed. The results indicate the flat clinch-riveted joints created by the conical stepped blank holder have the advantages of no indentation, high energy absorption, and high joint strength. The flat clinch-rivet process should preferably use a conical stepped blank holder.","PeriodicalId":20663,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture","volume":"17 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2023-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79495611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-21DOI: 10.1177/09544054231189001
Ruirui Li, Yongmeng Liu, Chuanzhi Sun, Jiubin Tan
Assembly is an essential part of aero-engine manufacturing, and the assembly quality will affect the engine’s stability and service life. Spindle inertia is an essential factor affecting aero-engine dynamic performance. Assembly can affect the spindle inertia of the aircraft engine, which in turn affects the dynamic performance of the engine. This paper proposes a transfer model of spindle inertia based on machining error transmission, studying the variation law of spindle inertia of multi-stage rotors under the influence of assembly, providing an optimized assembly method with minimized spindle inertia. The influence law of machining errors on spindle inertia is analyzed through the simulation and probability density method. The assembly results of the designed rotors verify the effectiveness of the inertia transfer and assembly model. The results show that the spindle inertia of multi-stage rotors is affected by machining errors, and the spindle inertia can be adjusted by changing the assembly methods. This paper provides a new idea for the transmission and adjustment of spindle inertia of assembly rotors.
{"title":"A novel assembly method of aero-engine rotors with minimized spindle inertia","authors":"Ruirui Li, Yongmeng Liu, Chuanzhi Sun, Jiubin Tan","doi":"10.1177/09544054231189001","DOIUrl":"https://doi.org/10.1177/09544054231189001","url":null,"abstract":"Assembly is an essential part of aero-engine manufacturing, and the assembly quality will affect the engine’s stability and service life. Spindle inertia is an essential factor affecting aero-engine dynamic performance. Assembly can affect the spindle inertia of the aircraft engine, which in turn affects the dynamic performance of the engine. This paper proposes a transfer model of spindle inertia based on machining error transmission, studying the variation law of spindle inertia of multi-stage rotors under the influence of assembly, providing an optimized assembly method with minimized spindle inertia. The influence law of machining errors on spindle inertia is analyzed through the simulation and probability density method. The assembly results of the designed rotors verify the effectiveness of the inertia transfer and assembly model. The results show that the spindle inertia of multi-stage rotors is affected by machining errors, and the spindle inertia can be adjusted by changing the assembly methods. This paper provides a new idea for the transmission and adjustment of spindle inertia of assembly rotors.","PeriodicalId":20663,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture","volume":"53 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2023-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89106706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-20DOI: 10.1177/09544054231183022
Hosein Kishani, S. Mazdak, M. Sheykholeslami, Navid Ajabshiri, M. Shalvandi, Mohammad Moein Bagheri Tabatabaee
In the deep drawing process of sheet metals, lack of formability and the defects generated as a consequence of friction are two main limiting factors. Using ultrasonic vibration is an impressive way to decrease these limitations. In this paper, the ultrasonic – aided deep drawing process with a novel way of applying radial ultrasonic vibration is presented. The novelty of the presented method is using the bending mode of vibration in the sheet metal and the die using radial ultrasonic vibration. The presented method, contrary to the other techniques of applying ultrasonic vibration, has shown much fewer resonance frequency variations by changing the sheet metal geometry during the process and likewise with a variation of the clearance between the blank holder and the die. For this purpose, the finite element method was used in designing the equipment for the deep drawing process. The experimental test was done on St12 in the presence and absence of ultrasonic vibration. The effect of ultrasonic vibration in the presented method on the wrinkling and thinning defects and likewise the forming forces were experimentally studied. The results indicated the high efficiency of the presenting method in decreasing both the forming forces and the wrinkling and thinning defects. About a 42.3% decrease in the forming forces and a 4.4% decrease in the thinning effect were achieved by applying ultrasonic vibration.
{"title":"A new method to exploit ultrasonic vibrations in deep drawing process","authors":"Hosein Kishani, S. Mazdak, M. Sheykholeslami, Navid Ajabshiri, M. Shalvandi, Mohammad Moein Bagheri Tabatabaee","doi":"10.1177/09544054231183022","DOIUrl":"https://doi.org/10.1177/09544054231183022","url":null,"abstract":"In the deep drawing process of sheet metals, lack of formability and the defects generated as a consequence of friction are two main limiting factors. Using ultrasonic vibration is an impressive way to decrease these limitations. In this paper, the ultrasonic – aided deep drawing process with a novel way of applying radial ultrasonic vibration is presented. The novelty of the presented method is using the bending mode of vibration in the sheet metal and the die using radial ultrasonic vibration. The presented method, contrary to the other techniques of applying ultrasonic vibration, has shown much fewer resonance frequency variations by changing the sheet metal geometry during the process and likewise with a variation of the clearance between the blank holder and the die. For this purpose, the finite element method was used in designing the equipment for the deep drawing process. The experimental test was done on St12 in the presence and absence of ultrasonic vibration. The effect of ultrasonic vibration in the presented method on the wrinkling and thinning defects and likewise the forming forces were experimentally studied. The results indicated the high efficiency of the presenting method in decreasing both the forming forces and the wrinkling and thinning defects. About a 42.3% decrease in the forming forces and a 4.4% decrease in the thinning effect were achieved by applying ultrasonic vibration.","PeriodicalId":20663,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture","volume":"248 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2023-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75756150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-20DOI: 10.1177/09544054231187675
Chuanpeng Luo, H. Choo, Hafisoh Ahmad, P. Sivasankaran
A promising alternative to fossil fuel energy is the fuel cell technology. Proton exchange membrane (PEM) fuel cells are widely used in electric vehicle and mobile power generation fields. There are several components in the PEM fuel cell, namely the gas diffusion layer (GDL), PEM, catalyst layer (CL) and bipolar plate (BPP). The GDL is one of the key components of a PEM fuel cell and acts as a distributor of reagents, current conductor, water manager and a CL support. This paper presents an analysis of the materials and fabrication technologies of the GDL in the PEM fuel cell. A summary of the main materials for manufacturing the macroporous substrate (MPS) and microporous layer (MPL) of GDL was presented. Advanced manufacturing methods were described as single layer manufacturing, double layer manufacturing and multilayer manufacturing. A brief overview of the materials and manufacturing processes of BPP and CL were also presented. Future research directions have also been proposed.
{"title":"A review on gas diffusion layer in proton exchange membrane fuel cell: Materials and manufacturing","authors":"Chuanpeng Luo, H. Choo, Hafisoh Ahmad, P. Sivasankaran","doi":"10.1177/09544054231187675","DOIUrl":"https://doi.org/10.1177/09544054231187675","url":null,"abstract":"A promising alternative to fossil fuel energy is the fuel cell technology. Proton exchange membrane (PEM) fuel cells are widely used in electric vehicle and mobile power generation fields. There are several components in the PEM fuel cell, namely the gas diffusion layer (GDL), PEM, catalyst layer (CL) and bipolar plate (BPP). The GDL is one of the key components of a PEM fuel cell and acts as a distributor of reagents, current conductor, water manager and a CL support. This paper presents an analysis of the materials and fabrication technologies of the GDL in the PEM fuel cell. A summary of the main materials for manufacturing the macroporous substrate (MPS) and microporous layer (MPL) of GDL was presented. Advanced manufacturing methods were described as single layer manufacturing, double layer manufacturing and multilayer manufacturing. A brief overview of the materials and manufacturing processes of BPP and CL were also presented. Future research directions have also been proposed.","PeriodicalId":20663,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture","volume":"7 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2023-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76069356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-05DOI: 10.1177/09544054231182549
Yun Zhang, Z. Xu, Jingqing Liu, Zhitong Chen, Zhengqing Zhu
Blade has the characteristics of high machining quality of complex curved surface. If there is no benchmark before machining, it is impossible to judge whether the blades before machining are qualified. Therefore, it is necessary to analyze the blade measurement data. Due to the large measurement point error and disordered distribution, it is necessary to optimize the blade registration. Therefore, blade model registration and positioning is particularly important in blade shape detection and analysis. First, preregistration is carried out based on the six point optimization selection of the blade. After preregistration, the selection method of registration control point set based on theoretical model and statistical error is proposed, planning the registration datum point set on the blade model. The registration control point set is obtained through the registration operation between the measurement data and the registration reference point set. Finally, based on the stability and reliability of important sampling sensitivity and statistical error, obtain the probability density function of error normal distribution statistics samples and important samples. The selection of statistical control points and the rationality of the objective function were verified. The stability/reliability of the statistical alignment point selection is proved to be feasible. The statistical registration deviation is [0.015,0.026] mm, and the ICP registration deviation is [0.031,0.035] mm. The average deviation of statistics registration is about 0.013 mm smaller than the average deviation of ICP registration. The deviation of statistical sampling points is about 0.0214 mm, and that of traditional sampling points is about 0.0275 mm. The deviation of statistical sampling points is about 0.0061 mm smaller than that of traditional sampling points. It meets the requirements of rapid, high efficiency and high precision measurement for aeroengine blades.
{"title":"Research on blade statistics measurement registration planning technology","authors":"Yun Zhang, Z. Xu, Jingqing Liu, Zhitong Chen, Zhengqing Zhu","doi":"10.1177/09544054231182549","DOIUrl":"https://doi.org/10.1177/09544054231182549","url":null,"abstract":"Blade has the characteristics of high machining quality of complex curved surface. If there is no benchmark before machining, it is impossible to judge whether the blades before machining are qualified. Therefore, it is necessary to analyze the blade measurement data. Due to the large measurement point error and disordered distribution, it is necessary to optimize the blade registration. Therefore, blade model registration and positioning is particularly important in blade shape detection and analysis. First, preregistration is carried out based on the six point optimization selection of the blade. After preregistration, the selection method of registration control point set based on theoretical model and statistical error is proposed, planning the registration datum point set on the blade model. The registration control point set is obtained through the registration operation between the measurement data and the registration reference point set. Finally, based on the stability and reliability of important sampling sensitivity and statistical error, obtain the probability density function of error normal distribution statistics samples and important samples. The selection of statistical control points and the rationality of the objective function were verified. The stability/reliability of the statistical alignment point selection is proved to be feasible. The statistical registration deviation is [0.015,0.026] mm, and the ICP registration deviation is [0.031,0.035] mm. The average deviation of statistics registration is about 0.013 mm smaller than the average deviation of ICP registration. The deviation of statistical sampling points is about 0.0214 mm, and that of traditional sampling points is about 0.0275 mm. The deviation of statistical sampling points is about 0.0061 mm smaller than that of traditional sampling points. It meets the requirements of rapid, high efficiency and high precision measurement for aeroengine blades.","PeriodicalId":20663,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture","volume":"23 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2023-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80576083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-05DOI: 10.1177/09544054231182264
Dr. G Harish, T. Gowtham, Amirthan Arunachalam, M.S. Narassima, Damien Lamy, M. Thenarasu
In the era where mass production is inevitable, developments in the manufacturing process have helped industries to produce goods in batches of enormous quantities. With the drastic growth in technology, it is crucial to update, and improve assembly lines continuously. This study aims to systematically understand the area where an assembly line needs improvement to enhance its process and productivity. Published articles related to assembly line improvements, lean techniques, and simulation were synthesized exhaustively. A Discrete Event Simulation model of an automated manufacturing company was developed based on the data acquired and observations. Integration of lean techniques along with simulation adds to the effectiveness of the proposed method. Crucial areas that need improvement were identified, and lean techniques such as Kaizen and Poka-Yoke were applied. The efficiency of the proposed improvements was visualized by altering the simulation model. The average WIP was reduced from 87.2 to 81.2, and the cycle time of seven stations was reduced as a result of the implementation of Lean principles. Laser Marking Station (Fixture clamping and Stopper Cylinder) and Pad Printing & Vision Inspection Station witnessed a twofold improvement in the proposed model. There was an improvement in throughput by 7.14%. The study would prove helpful for managers and policymakers to visualize the usefulness of implementing lean techniques with minimal investment.
{"title":"Productivity improvement by application of simulation and lean approaches in an multimodel assembly line","authors":"Dr. G Harish, T. Gowtham, Amirthan Arunachalam, M.S. Narassima, Damien Lamy, M. Thenarasu","doi":"10.1177/09544054231182264","DOIUrl":"https://doi.org/10.1177/09544054231182264","url":null,"abstract":"In the era where mass production is inevitable, developments in the manufacturing process have helped industries to produce goods in batches of enormous quantities. With the drastic growth in technology, it is crucial to update, and improve assembly lines continuously. This study aims to systematically understand the area where an assembly line needs improvement to enhance its process and productivity. Published articles related to assembly line improvements, lean techniques, and simulation were synthesized exhaustively. A Discrete Event Simulation model of an automated manufacturing company was developed based on the data acquired and observations. Integration of lean techniques along with simulation adds to the effectiveness of the proposed method. Crucial areas that need improvement were identified, and lean techniques such as Kaizen and Poka-Yoke were applied. The efficiency of the proposed improvements was visualized by altering the simulation model. The average WIP was reduced from 87.2 to 81.2, and the cycle time of seven stations was reduced as a result of the implementation of Lean principles. Laser Marking Station (Fixture clamping and Stopper Cylinder) and Pad Printing & Vision Inspection Station witnessed a twofold improvement in the proposed model. There was an improvement in throughput by 7.14%. The study would prove helpful for managers and policymakers to visualize the usefulness of implementing lean techniques with minimal investment.","PeriodicalId":20663,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture","volume":"33 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2023-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84267002","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-01DOI: 10.1177/09544054231184914
M. M. Kasaei, H. M. Naeini, B. Abbaszadeh, S. Hashemi, L. D. da Silva
In this paper, two advanced sealing methods are proposed to enhance the formability of aluminium alloys in the tube hydroforming process. These methods are aimed at omitting friction force at the contact area between the tube and the die in the feed region and facilitating the material flow to the deformation region. The advanced sealing methods are numerically and experimentally examined against the conventional sealing method by conducting the free bulge test on AA6063 aluminium tubes. The deformation mechanics are deeply analysed in the principal strain space to identify the influence of the sealing methods on deformation paths. In addition, the effectiveness of the advanced sealing methods is evaluated under different lubrication conditions and contact lengths in the feed region. Results show that in the advanced sealing methods compared to the conventional one, the thickness in the feed region does not increase and the necking occurs in larger in-plane strains, leading to a higher bulge height. Results also allow concluding that a higher bulge height is formed using the second advanced sealing method, in which the tube is pressurized from both sides in the feed region. Thus, the advanced sealing methods are recommended for tube hydroforming of aluminium alloys with low formability.
{"title":"Improvement of material flow in tube hydroforming by advanced sealing methods","authors":"M. M. Kasaei, H. M. Naeini, B. Abbaszadeh, S. Hashemi, L. D. da Silva","doi":"10.1177/09544054231184914","DOIUrl":"https://doi.org/10.1177/09544054231184914","url":null,"abstract":"In this paper, two advanced sealing methods are proposed to enhance the formability of aluminium alloys in the tube hydroforming process. These methods are aimed at omitting friction force at the contact area between the tube and the die in the feed region and facilitating the material flow to the deformation region. The advanced sealing methods are numerically and experimentally examined against the conventional sealing method by conducting the free bulge test on AA6063 aluminium tubes. The deformation mechanics are deeply analysed in the principal strain space to identify the influence of the sealing methods on deformation paths. In addition, the effectiveness of the advanced sealing methods is evaluated under different lubrication conditions and contact lengths in the feed region. Results show that in the advanced sealing methods compared to the conventional one, the thickness in the feed region does not increase and the necking occurs in larger in-plane strains, leading to a higher bulge height. Results also allow concluding that a higher bulge height is formed using the second advanced sealing method, in which the tube is pressurized from both sides in the feed region. Thus, the advanced sealing methods are recommended for tube hydroforming of aluminium alloys with low formability.","PeriodicalId":20663,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture","volume":"4 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73011895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-30DOI: 10.1177/09544054231184281
A. Jamea, Liting Jing, Xiang Peng, Jiquan Li, Shaofei Jiang
Product customers often have varying preferences because they have different environmental and social habits backgrounds’ requirements “customer diversity requirements.” Even for a particular product used in specific place, the requirements of product stakeholders are often differed. It is a challenge to adapt diversity requirements to concepts design of products to satisfying different customers. To address the customer diversity requirements issue, after the analysis of customers information is completed, customers are classified according to their diversity. Then, customer requirements (CRs) and engineering specifications (ESs) that satisfy the CRs are determined. The priorities of CRs are calculated with analytical hierarchy process (AHP) involving a pairwise comparison matrix in the first step and fix-sum method in the second step. Quality function deployment (QFD) relation matrix is utilized to form the relationships intensities of CRs and ESs. ESs satisfaction degree values obtained concerning computation of CRs priorities calculated via AHP, while ESs target degree values obtained concerning computation of CRs priorities calculated via fix-sum method into QFD relation matrix. ESs satisfaction degree compared with ESs targets degree to measure the satisfaction for each customer target individually. The decision on whether the concept design needs further development or modification is made based on the comparison results. A case study of the application of this approach is presented to illustrate the possibilities of the technique in developing or modifying concept design according to customers’ life environmental and social habits background “diversity requirements.” The case proved that technique can adapt products to different environments and that products used by existing customers can be used for new customers or markets (product globalization) instead of being confined to one location. Moreover, the approach is very useful in clarifying the objectives expected by customers for specifying the development or modification of a product concept.
{"title":"Modification and development of product concept design based on the product customers life environmental and social habits backgrounds’ diversity requirements","authors":"A. Jamea, Liting Jing, Xiang Peng, Jiquan Li, Shaofei Jiang","doi":"10.1177/09544054231184281","DOIUrl":"https://doi.org/10.1177/09544054231184281","url":null,"abstract":"Product customers often have varying preferences because they have different environmental and social habits backgrounds’ requirements “customer diversity requirements.” Even for a particular product used in specific place, the requirements of product stakeholders are often differed. It is a challenge to adapt diversity requirements to concepts design of products to satisfying different customers. To address the customer diversity requirements issue, after the analysis of customers information is completed, customers are classified according to their diversity. Then, customer requirements (CRs) and engineering specifications (ESs) that satisfy the CRs are determined. The priorities of CRs are calculated with analytical hierarchy process (AHP) involving a pairwise comparison matrix in the first step and fix-sum method in the second step. Quality function deployment (QFD) relation matrix is utilized to form the relationships intensities of CRs and ESs. ESs satisfaction degree values obtained concerning computation of CRs priorities calculated via AHP, while ESs target degree values obtained concerning computation of CRs priorities calculated via fix-sum method into QFD relation matrix. ESs satisfaction degree compared with ESs targets degree to measure the satisfaction for each customer target individually. The decision on whether the concept design needs further development or modification is made based on the comparison results. A case study of the application of this approach is presented to illustrate the possibilities of the technique in developing or modifying concept design according to customers’ life environmental and social habits background “diversity requirements.” The case proved that technique can adapt products to different environments and that products used by existing customers can be used for new customers or markets (product globalization) instead of being confined to one location. Moreover, the approach is very useful in clarifying the objectives expected by customers for specifying the development or modification of a product concept.","PeriodicalId":20663,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture","volume":"39 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72943731","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-30DOI: 10.1177/09544054231184285
Songhua Ma, Kaixin Hu, T. Hu, Z. Xiong
Assembly deviation analysis methods, which have been studied and improved over the past 30 years, are necessary and effective for checking functional requirements before manufacturing. Contact deformation was not negligible and significantly affected the final assembly deviation, which prevented the application of the current assembly deviation analysis methods. Considering the contact deformation, we aimed to improve the precision of the 3D deviation analysis methods, which are based on the Jacobian-Torsor matrix and skin model shape (SMS), respectively. In this study, the contact deformation was quantified based on the Hertzian contact theory. The unified Jacobian-Torsor matrix is modified with the location points and contact deformation to increase the precision of the stack-up assembly deviation. In the SMS-based method, the assembly components are represented as non-nominal SMS models. The final posture of each component and stack-up assembly deviation were solved by iteratively mimicking the physical assembly process. The practicality of the improved deviation analysis method was successfully demonstrated through two case studies. The modified Jacobian-Torsor matrix-based method is efficient. However, the improved SMS-based method can provide more precise results by mimicking tight fitting on mating surfaces.
{"title":"Two improved assembly deviation analysis methods based on Jacobian–Torsor matrix and skin model shapes with contact deformation effort","authors":"Songhua Ma, Kaixin Hu, T. Hu, Z. Xiong","doi":"10.1177/09544054231184285","DOIUrl":"https://doi.org/10.1177/09544054231184285","url":null,"abstract":"Assembly deviation analysis methods, which have been studied and improved over the past 30 years, are necessary and effective for checking functional requirements before manufacturing. Contact deformation was not negligible and significantly affected the final assembly deviation, which prevented the application of the current assembly deviation analysis methods. Considering the contact deformation, we aimed to improve the precision of the 3D deviation analysis methods, which are based on the Jacobian-Torsor matrix and skin model shape (SMS), respectively. In this study, the contact deformation was quantified based on the Hertzian contact theory. The unified Jacobian-Torsor matrix is modified with the location points and contact deformation to increase the precision of the stack-up assembly deviation. In the SMS-based method, the assembly components are represented as non-nominal SMS models. The final posture of each component and stack-up assembly deviation were solved by iteratively mimicking the physical assembly process. The practicality of the improved deviation analysis method was successfully demonstrated through two case studies. The modified Jacobian-Torsor matrix-based method is efficient. However, the improved SMS-based method can provide more precise results by mimicking tight fitting on mating surfaces.","PeriodicalId":20663,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture","volume":"6 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89117352","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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