一种超快激光精密焊接系统及焊接方法
By combining a laser pulse time-domain shaping module and a freeform lens, the problem of focus control in ultrafast laser welding is solved, achieving high-precision welding, improving welding quality and shear resistance, and reducing residual stress.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- NORTHWESTERN POLYTECHNICAL UNIV
- Filing Date
- 2023-04-28
- Publication Date
- 2026-07-17
AI Technical Summary
In ultrafast laser welding, the laser focus is difficult to control precisely, and uneven welding strength leads to large residual stress, making the welded parts prone to breakage.
The laser pulse time-domain shaping module, composed of a CNC Pockel cell, cascaded birefringent crystals, and polarization beam splitters, achieves precise focusing and axial extension of the laser focal point by controlling the time-domain envelope of the laser pulse and the single-pulse splitting within the envelope, combined with a freeform surface lens. This, along with a three-axis displacement platform, enables high-precision welding.
It achieves precise control of the laser focus, optimizes welding temperature, improves shear resistance, reduces residual stress, reduces sample breakage, and improves welding quality and precision.
Smart Images
Figure CN116511705B_ABST