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For the problems of flange cracking for cross member of steel H420LAD, the stamping simulation of cross member was performed, the scheme was evaluated on type of flange, major and minor stain, paths of strain. The results show that minor stain was the main parameters of parts flanging and cracking, the decrease of minor strain was beneficial to eliminating flange cracking, increasing the plastic strain was the direction of material optimization. 2 schemes to stamp processing were proposed and simulated, the results show that after optimization of the gaps between die and punch, the distances between the blocks for flanging and the punch, the forming safety margin was increased from 0% to 4.49%, the edge quality of part was improved slightly. The optimization of blank was carried out, the process of pre-flanging was changed to drawing, process of trimming was added, the forming safety margin was increased from 0% to 16.44%, and the qualified rate of the parts is 100%.
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| 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 |
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