The process of deep laser engraving technique makes use of a precisely concentrated beam of light to create 3D shapes into the metal. Lasers with pulsed fibers make among the most effective equipment for deep engraving as they can reach the maximum power required to carve the metal surface.
The laser and the deep-engraving aren’t exactly the same. Deep engraving is merely deeper, it takes longer and generally includes requirements for finishing which are enjoyable both visually and to feel. If you’re looking for aesthetic and depth requirements continue reading to find out more.
How Deep Can You Laser Engrave?
Close-up image of deep engraving on steel. When deep engraving is involved the depth could easily be a few millimeters deep into the metal. This is quite different from laser engraving is standard which is usually only several microns deep.
However, regular laser engraving may also be extremely deep, up to 500 microns. This is typically the case for the shot blast-resistant laser marking.
The primary distinction between laser and the deep engraving comes from the fact that deep engraving has aesthetics and depth. However, laser engraving demands high contrast to satisfy the requirements for traceability, just like laser engraving.
What Is Deep Engraving Used For?
Illustration of Deep logo engraving using a stamping plate. Laser engraving allows for the incising of 3D shapes like designs, logos, text serial numbers, barcodes, and other characters into work pieces and components. It is a process of high-end quality which is exact, repeatable, and uniform.
The process is employed for a myriad of uses. The most popular are deep logo engraving and stamping plate engraving as well as molding insert engraving (especially in automotive components).
Other examples are engraving high-value metal parts, such as customized weapons and knobs. Deep engraving of metal can be used to completely carve parts in 3D or remove the material.
Can You Deep Engraved Stainless Steel?
It is important to exercise care if you plan to deeply engrave stainless steel because it will take off the oxide protective layer which stops rust from occurring. The stainless steel can also change color in the course of the process. Color changes can be caused by certain alloys, but are mostly caused by the way laser parameters are set up.
If the laser is set to engrave as quickly as feasible, stainless steel is likely to become black. For a clear surface, it will take longer.
The most important thing to keep in your mind is, once the protective layer is gone it is essential to stop the rust from happening by utilizing an additional method like paint, chrome plating, and so on.
What Are the Most Important Parameters?
When selecting a laser one of the most crucial aspects to be considered is to ensure that the required cycle time is the laser’s power. A laser with 500W might not be 5 times more efficient than a 100Wlaser, but it’s still a lot faster.
The majority of deep engraving applications need a minimum of 100W. Deep engraving can be done with less than 100W, but you might find that the time for engraving is too long. We don’t suggest it.
A laser head that has the lens on the front amazing as it sounds however, the power of lasers is not the primary factor to attain a speedy result when engraving. The lens is the most important.
Lenses influence the way that laser beams are directed, and only the beam that is focused can attain the level of intensity that is required for deep engraving. With the correct lens, you will effectively increase the speed of engraving.
The scanning speed refers to the speed that the laser beam is moving. A slower speed of scanning means it is that laser light stays longer across the same area. This can increase the amount of energy that is absorbed by the area and allows you to create engravings more deeply and speedier. However, there’s a limit to too much energy can cause overheating and cause discoloration of the surface.
If you require a speedy or slow speed for scanning is contingent on the quality and duration requirements. The trick is to find the perfect equilibrium between quality and speed. When we run test samples for our clients, we present various results and let them pick the one they prefer the most.
Certain metals such as aluminum can be engraved more quickly and deeper when preheated. This is because they can reach the temperature required to ablate faster. Our experiments revealed that aluminum engraving could go as deep as 40% at the same time.
The preheating process can be accomplished by using heating plates in conjunction with the laser engraving machine.
The line width refers to the length that laser beams travel across a line before the start of an entirely new line. When the laser begins on a new line, there is some delay of approximately 0.03 seconds, also known as the speed of the hatch. It might seem small but it’s a lot!
In the case of a line width of 1 millimeter and the delay of the hatch could be more than 50 percent of the marking time. For a line width of 50 millimeters, it can be only 10 percent.
In simple terms, the wider lines, the greater the speed of engraving. For instance, making a logo with a smaller size can be done at a speed of 1 millimeters/s, as opposed to 2.51 millimeters per second for a bigger logo.