Research on current assisted flexible mold micro-forming process based on single channel
Aiming at the problems such as poor forming accuracy and serious thickness thinning in sheet metal bulging, a method of current-assisted flexible mold forming was proposed. The single channel flexible mold forming experiment was carried out with 304 stainless steel sheet as the experimental material...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2025-01-01
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| Series: | Materials Research Express |
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| Online Access: | https://doi.org/10.1088/2053-1591/adbb9f |
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| _version_ | 1850035494554959872 |
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| author | Qingjuan Zhao Gui Wang Jinchao Sun Ruoyu Zhang Lejia Zhou Yunfei Qu |
| author_facet | Qingjuan Zhao Gui Wang Jinchao Sun Ruoyu Zhang Lejia Zhou Yunfei Qu |
| author_sort | Qingjuan Zhao |
| collection | DOAJ |
| description | Aiming at the problems such as poor forming accuracy and serious thickness thinning in sheet metal bulging, a method of current-assisted flexible mold forming was proposed. The single channel flexible mold forming experiment was carried out with 304 stainless steel sheet as the experimental material. Firstly, the microstructure change of the sheet under the action of current was analyzed. Then, the flexible mold bulging law of stainless steel sheet was explored from two aspects of current intensity and pressure holding time. Finally, the difference between the traditional rigid mold and the flexible mold is compared. The experimental results show that with the increase of the pretreatment current, the fibrous distribution in the thickness direction of the sheet is alleviated, the work hardening is weakened, the bulging depth of the flexible mold is gradually increased, and the wall thickness distribution is more uniform. When the current is 25 A, the bulging depth of the rolled sheet increases from 841 um to 903 um, an increase of about 7.4%. The thinning rate of rounded corners was reduced from the initial 30.05% to 12.74%. When the pressure holding time is increased from 1.5 s to 3.5 s, the wall thickness thinning in each area is improved, and the thinning at the rounded corner is reduced to about 10.66%. Under the same experimental parameters, the bulging of flexible mold is better than that of rigid mold, the single channel profile is clearer, the surface roughness is lower, and the forming performance is better. |
| format | Article |
| id | doaj-art-a1cf5aa961d94e67b5c68b8a7a816cb1 |
| institution | DOAJ |
| issn | 2053-1591 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj-art-a1cf5aa961d94e67b5c68b8a7a816cb12025-08-20T02:57:28ZengIOP PublishingMaterials Research Express2053-15912025-01-0112303650210.1088/2053-1591/adbb9fResearch on current assisted flexible mold micro-forming process based on single channelQingjuan Zhao0Gui Wang1Jinchao Sun2https://orcid.org/0009-0003-9286-0074Ruoyu Zhang3Lejia Zhou4Yunfei Qu5https://orcid.org/0009-0007-7133-1252Key Laboratory of Advanced Manufacturing and Automation Technology (Guilin University of Technology) , Education Department of Guangxi Zhuang Autonomous Region, Guilin 541006, People’s Republic of ChinaKey Laboratory of Advanced Manufacturing and Automation Technology (Guilin University of Technology) , Education Department of Guangxi Zhuang Autonomous Region, Guilin 541006, People’s Republic of ChinaKey Laboratory of Advanced Manufacturing and Automation Technology (Guilin University of Technology) , Education Department of Guangxi Zhuang Autonomous Region, Guilin 541006, People’s Republic of ChinaKey Laboratory of Advanced Manufacturing and Automation Technology (Guilin University of Technology) , Education Department of Guangxi Zhuang Autonomous Region, Guilin 541006, People’s Republic of ChinaKey Laboratory of Advanced Manufacturing and Automation Technology (Guilin University of Technology) , Education Department of Guangxi Zhuang Autonomous Region, Guilin 541006, People’s Republic of ChinaSchool of Light Industry, Harbin University of Commerce , Harbin 150028, People’s Republic of ChinaAiming at the problems such as poor forming accuracy and serious thickness thinning in sheet metal bulging, a method of current-assisted flexible mold forming was proposed. The single channel flexible mold forming experiment was carried out with 304 stainless steel sheet as the experimental material. Firstly, the microstructure change of the sheet under the action of current was analyzed. Then, the flexible mold bulging law of stainless steel sheet was explored from two aspects of current intensity and pressure holding time. Finally, the difference between the traditional rigid mold and the flexible mold is compared. The experimental results show that with the increase of the pretreatment current, the fibrous distribution in the thickness direction of the sheet is alleviated, the work hardening is weakened, the bulging depth of the flexible mold is gradually increased, and the wall thickness distribution is more uniform. When the current is 25 A, the bulging depth of the rolled sheet increases from 841 um to 903 um, an increase of about 7.4%. The thinning rate of rounded corners was reduced from the initial 30.05% to 12.74%. When the pressure holding time is increased from 1.5 s to 3.5 s, the wall thickness thinning in each area is improved, and the thinning at the rounded corner is reduced to about 10.66%. Under the same experimental parameters, the bulging of flexible mold is better than that of rigid mold, the single channel profile is clearer, the surface roughness is lower, and the forming performance is better.https://doi.org/10.1088/2053-1591/adbb9fmaterial formingmaterial processing technologypulse currentsoft diesheet metalmicro-forming |
| spellingShingle | Qingjuan Zhao Gui Wang Jinchao Sun Ruoyu Zhang Lejia Zhou Yunfei Qu Research on current assisted flexible mold micro-forming process based on single channel Materials Research Express material forming material processing technology pulse current soft die sheet metal micro-forming |
| title | Research on current assisted flexible mold micro-forming process based on single channel |
| title_full | Research on current assisted flexible mold micro-forming process based on single channel |
| title_fullStr | Research on current assisted flexible mold micro-forming process based on single channel |
| title_full_unstemmed | Research on current assisted flexible mold micro-forming process based on single channel |
| title_short | Research on current assisted flexible mold micro-forming process based on single channel |
| title_sort | research on current assisted flexible mold micro forming process based on single channel |
| topic | material forming material processing technology pulse current soft die sheet metal micro-forming |
| url | https://doi.org/10.1088/2053-1591/adbb9f |
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