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2021-01-01 23:08:20

焊接變形的預防和改善

在焊接薄板大幅面多焊點時,往往易產生焊接變形,影響后期工件裝配精度和使用性能,焊接時一種局部加熱的材料加工方式,焊接變形形成的原因是工件各部分焊接熱輸入不均勻,熱脹冷縮不一致造成焊接變形,因此需要從變形產生的原因加以預防或改善:

1、優化工藝參數,減少熱輸入量,如增加激光峰值,減小焊接脈寬,在不影響焊接表面質量的前提下可有效減小焊接變形量。

2、降低焊接速度和平率,使單位時間內輸入工件的熱量減小,則焊接變形量隨之減小。

3、優化焊接順序,使工件各部分受熱均勻,也是減小焊接變形的一種有效方法。

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