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公开(公告)号：US11850645B2
公开(公告)日：2023-12-26
申请号：US17509043
申请日：2021-10-24
Applicant: Taiyuan University of Science and Technology
Inventor： Zhibing Chu , Chun Xue , Duo Zhang , Dong Wei , Qianhua Yang , Cuirong Liu , Yugui Li
Abstract: A method for preparing a multilayer metal composite pipe includes steps of: internally and externally grinding blank pipes; cleaning oil stains; assembling a multilayer metal pipe; drawing to reduce a diameter; performing high-speed friction welding at the pipe ends; performing heat treatment; performing four-roller cross-rolling; straightening; performing two-roller cold-rolling; performing cold-drawing to reduce the diameter; performing cold-expansion to reduce the diameter; performing precise cold-rolling; degreasing; brightening; performing surface grinding; cleaning dust; detecting multilayer metal interface bonding; detecting flaws; testing metal structure performance; and sizing and packaging. By cycling the cold-drawing, the cold-expansion, and the precision cold-rolling, key indicators such as product dimensional accuracy, surface quality, material properties, and crystal grain size can be collaboratively controlled, so as to achieve higher accuracy, better performance, and more outstanding extreme specifications. The present invention solves the problem of inconsistent extension due to differences in metal properties.
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公开(公告)号：US11965862B1
公开(公告)日：2024-04-23
申请号：US18536298
申请日：2023-12-12
Applicant: Taiyuan University of Science and Technology
Inventor： Cunlong Zhou , Dong Wei , Shijie Sun , Guodong Li , Yijing Meng
Abstract: A fatigue bending and folding test device for an ultra-thin metal strip, including: a first driver module, a first folding module, a first diameter adjustment module, an expansion module, and a frame. The first driver module, the first folding module, the first diameter adjustment module, and the expansion module are all disposed on the frame. The first driver module includes a servo motor, a coupler, and a drive gearbox; the drive gearbox includes a driving gear shaft, a driven gear shaft, a plurality of output end covers, and a plurality of bearings. The first folding module includes an upper folding member, a lower folding member, and a first mounting base. The first clamping member includes a sliding block, a lower clamping plate, an upper clamping plate, a rotating shaft, an intermediate pressure plate, and a plurality of fixing bolts.
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公开(公告)号：US12157154B2
公开(公告)日：2024-12-03
申请号：US17509040
申请日：2021-10-24
Applicant: TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
Inventor： Zhibing Chu , Qianhua Yang , Dong Wei , Duo Zhang , Chun Xue , Xiaodong Zhao , Yugui Li
IPC: B21B19/04
Abstract: A method for preparing a high-performance difficult-to-deform metal precision seamless pipe includes steps of performing a heat treatment; drilling; externally grinding; internally grinding; straightening; performing four-roller warm-rolling; performing warm-drawing to reduce a diameter; performing warm-expansion to reduce a wall thickness and increase the diameter; performing precise cold-rolling; degreasing; brightening; performing surface grinding; cleaning dust; detecting flaws; testing metal structure performance; and sizing and packaging. By cycling the warm-drawing, the warm-expansion, and the precision cold-rolling, key indicators such as product dimensional accuracy, surface quality, material properties, and crystal grain size can be collaboratively controlled, to achieve higher accuracy, better performance, and more outstanding extreme specifications. Product requirements of different hard-to-deform metal materials and different product specifications can be satisfied, to flexibly prepare metal pipe products with different material characteristics, which greatly improves production efficiency and effectively reduces production costs.
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