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Laser Welding Machines: Understanding Pulse Width in Laser Parameters
szhaiwei
2025-09-08
When setting up a laser welding machine, one of the most important parameters to understand is pulse width. This setting plays a crucial role in determining weld depth, heat input, and overall joint quality—especially when working with thin or sensitive materials.
1. What is Pulse Width?
Pulse width refers to the duration for which the laser beam is applied to the workpiece during a single pulse. It is typically measured in milliseconds (ms) and directly affects how much energy is delivered into the material. A longer pulse width increases heat penetration, while a shorter pulse width delivers energy more quickly and with less thermal impact.
2. How Pulse Width Influences Weld Quality
The correct pulse width setting ensures that the weld achieves the desired depth and strength without causing defects such as burn-through, warping, or cracking. For example, in applications like laser welding copper or laser welding aluminum, where thermal conductivity is high, adjusting the pulse width helps manage heat distribution more effectively.
3. Pulse Width and Material Thickness
Thin materials typically require a shorter pulse width to prevent excessive melting and distortion. In contrast, thicker metals benefit from a longer pulse width to ensure full penetration and a strong weld bead. Understanding this relationship allows operators to fine-tune the laser welding machine for optimal results across different production scenarios.
4. Practical Tips for Adjusting Pulse Width
Begin with manufacturer-recommended settings, then conduct test welds to evaluate bead shape and penetration. Monitor material response and adjust the pulse width accordingly. For precision applications, consider using pulsed laser modes that allow fine control over this and other key parameters.
Pulse width is a critical parameter in laser welding that directly affects weld quality, material compatibility, and process efficiency. Buyers of laser welding machines should ensure that the system they choose allows for precise and flexible control of pulse width to suit their specific application needs. Proper understanding and adjustment of this parameter will lead to better weld consistency and reduced rework. Haiwei Laser offers cost-effective laser processing solutions with 17 years of experience in laser automation.
REPORT