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The method of laser offset is used to simulate the deviation of edge trimming precision of aluminum alloy door parts. Taking the laser focus on the lap joint edge as a reference, the effect of the different offset distance, namely trimming deviation of parts on weld forming and properties is investigated. The results show that the weld seam surface forming and cross section morphology change with different trimming deviations. In term of weld seam forming, when the trimming deviation of the part gradually increases from -1.0 mm to +1.0 mm (the direction in which the trimming of the part is away from the laser spot and exposes the lower plate of the lap joint to the laser is defined as negative, and the opposite direction is defined as positive), the surface of the weld seam gradually becomes full. In term of weld seam mechanical properties, when the trimming deviation of the part is within the range of -0.5 mm to +1.0 mm, the change of the trimming deviation has little effect on the mechanical properties of the weld seam, and when the trimming deviation is -1.0 mm, the tensile strength of the weld joint is significantly reduced. Therefore, in order to ensure the forming and mechanical properties of the welding seam on the aluminum alloy door, the trimming deviation of parts should be ensured in the range of -0.5 mm to +1.0 mm during the trial production process.
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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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