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Outline
To quantitatively analyze the impact of electrode tip diameter on nugget diameter, resistance spot welding experiments and finite element analysis are conducted on hot-stamped steel using electrode tips with diameters of 6 mm and 8 mm. The welding currents required to obtain the same nugget diameter with electrode tips of 6 mm and 8 mm diameter are investigated. The results show that with the increase of welding current, the influence of electrode tip on the nugget diameter of resistance spot welding is gradually reduced without splash; When splash occurs, the electrode tip of 8mm diameter will obtain a larger nugget diameter. For 1.6 mm HQAS1500H+1.6 mm HQAS1500H plate group lapping form, the resistance spot welding process parameters can be set as 3.43 kN/420 ms/7 kA~3.43 kN/420 ms/8 kA. Within the common production welding current range, the deviation between the actual nugget diameter and the finite element simulation nugget diameter is less than 10%.
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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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