How Do You Make Laser Engraving Deeper?
Have you ever admired the coin markings or raised logos on metallic plates? These are prime examples of deep surface engraving, a technique that engraves the surface to a noticeable depth, leaving a prominent marking on the material.
Understanding Deep Laser Engraving：
Deep laser engraving involves using a powerful laser beam to vaporize material, creating standout designs surrounded by cavities. This results in a design that appears elevated, similar to the raised designs on stamps or coins. It’s a step beyond standard engraving where the design simply marks below the surface; in deep engraving, the design becomes more prominent due to the deep removal of the surrounding surface. This process requires more power, depth, and time compared to standard engraving.
Extending the Capabilities: 3D Laser Engraving：
An extension of deep engraving is 3D laser engraving, where the depth of material removal varies, giving the design a three-dimensional appearance. It enhances the visual impact and adds an extra dimension to the design.
How Deep Can Laser Engraving Go?
Deep laser engraving goes deeper than standard engraving, typically reaching depths of about 500 microns (0.5mm), although this can vary. The depth is usually limited to a few millimeters but is enough to add aesthetic appeal and make the design appear raised.
Can You Deep Laser Engrave Metal?
Yes, metals are well-suited for deep laser engraving. Precious metals like gold, silver, and platinum, and even stainless steel, though care must be taken with stainless steel to prevent corrosion. Commonly, pulsed fiber lasers, known for their power, are used for deep engraving of metallic parts.
Applications of Deep Laser Engraving：
Deep laser engraving finds its use in various applications where permanent markings are essential. From industrial marking of logos, letterings, and serial numbers on machine parts to creating stamp plates and intricate jewelry designs. It is also crucial in coin engraving for achieving detailed designs and text.
Making Laser Engraving Deeper：
To achieve deeper laser engraving, fine-tuning machine parameters such as speed, optical power, and number of passes is essential:
- Optical Power: The power setting is crucial. Higher optical power enables deeper engraving in a shorter time.
- Speed: Setting a lower speed allows the laser more time on each area, leading to deeper cuts.
- Number of Passes: Increasing the number of passes can compensate for a less powerful laser, achieving greater depth over time.
- Proper Ventilation: With deeper engraving involving longer processing times and more material removal, an effective exhaust system with a smoke extractor is necessary to maintain a safe working environment.
Deep laser engraving is a remarkable technology that pushes the boundaries of design in metalwork and beyond, allowing for precision and creativity in ways that were once impossible. Whether for aesthetic appeal or functional marking, the depth and precision achievable with modern laser engraving machines continue to transform industries.
