PDF
Full
Outline
This paper described the phenomenon of punching delamination of hot-rolled steel plate 700L for frame side rails and its harm. Through macro and micro observation, combined with the blanking process principle, the factors of material, process and mechanism that lead to delamination in punching were analyzed. It is believed that severe plastic deformation during punching leads to serious fibrosis of the structure, and the fibrous structure delaminates or breaks under the action of shear stress and normal stress, forming a competitive mechanism with the generation and expansion of main cracks in the tear band. If the delamination and fracture of the fiber occur later than the crack of the tear band, the delamination or serrated fracture on the surface of the punched hole can be prevented. Using Theory of Inventive Problem Solving(TRIZ) theory, the prestressed punching process is designed and developed, which not only ensures the integrity of the punched hole surface, but also ensures the punch life.
PDF
231
94
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62199257
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
