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Qingdao, Shandong, CN
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Patents Grants
last 30 patents
Information
Patent Grant
Continuous welding method and device for hybrid welding, welded fin...
Patent number
11,931,826
Issue date
Mar 19, 2024
CRRC QINGDAO SIFANG CO., LTD.
Xiaohui Han
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Information
Patent Grant
Beam structure and hybrid welding method thereof
Patent number
10,730,145
Issue date
Aug 4, 2020
CRRC QINGDAO SIFANG CO., LTD.
Xiaohui Han
B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Patents Applications
last 30 patents
Information
Patent Application
APPARATUS FOR REGULATING WELDING DEFORMATION OF BOX STRUCTURE AND R...
Publication number
20240408706
Publication date
Dec 12, 2024
CRRC QINGDAO SIFANG CO., LTD.
Xiaohui HAN
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Information
Patent Application
WELDING DEVICE FOR SUPPRESSING WELDING HOT CRACKS, AND WELDING SYSTEM
Publication number
20240316681
Publication date
Sep 26, 2024
CRRC QINGDAO SIFANG CO., LTD.
Xiaohui HAN
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Information
Patent Application
ELECTRIC RESISTANCE SPOT WELDING DEVICE AND METHOD
Publication number
20230405704
Publication date
Dec 21, 2023
CRRC QINGDAO SIFANG CO., LTD.
Xiaohui HAN
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Information
Patent Application
LASER STITCH WELDING DEVICE AND WELDING METHOD THEREFOR
Publication number
20220274201
Publication date
Sep 1, 2022
CRRC QINGDAO SIFANG CO., LTD.
Xiaohui HAN
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Information
Patent Application
CONTINUOUS WELDING METHOD AND DEVICE FOR HYBRID WELDING, WELDED FIN...
Publication number
20210162542
Publication date
Jun 3, 2021
CRRC QINGDAO SIFANG CO., LTD.
Xiaohui HAN
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Information
Patent Application
Process Method for Improving Welding Seam Quality of Laser Lap Welding
Publication number
20200324371
Publication date
Oct 15, 2020
CRRC QINGDAO SIFANG CO., LTD.
Xiaohui HAN
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Information
Patent Application
BEAM STRUCTURE AND HYBRID WELDING METHOD THEREOF
Publication number
20200023469
Publication date
Jan 23, 2020
CRRC QINGDAO SIFANG CO., LTD.
Xiaohui HAN
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