People often reach out to our expert machinists and ask what manufacturing process would be right for their upcoming project. To help everyone out, we started our series of blog posts about different manufacturing options, how they work, and when you should pick them.
Today’s guide is all about sheet metal laser cutting. We’ll cover what laser cutting is, the different types, pros and cons of this technology, and the fundamentals you need to know.
The name is not a joke, laser cutting is a manufacturing process where a laser physically cuts through sheets of metal, wood, plastic, leather, and more. In most machine shops, a laser cutter is strictly used for cutting sheet metal.
If you know how waterjet cutters work, you already understand the fundamentals of laser cutters.
There are a few different types of laser cutters, but they all work with the same principle — a strong laser will cut straight lines through a sheet of metal underneath. The head of the laser moves around, typically on a 2-axis or 3-axis gantry.
The laser is cutting based off a series of G-code, which is a machine language that comes from your CAD model.
A laser cutter can cut internal holes, features, and geometries as well as cutting out outlines of parts. This makes it a versatile addition to any machine shop that works with sheet metal.
There are three main types of laser cutters that you’ll find in an everyday machine shop: fiber lasers, CO2 lasers, and crystal lasers.
In our experience, fiber laser cutters are one of the more popular options. They require very little maintenance to upkeep, and they can easily run for 25,000 hours.
This technology uses long, thin strips of glass fibers to amplify the laser beam. This produces a lot of power, but a larger cutting kerf (which is sometimes good and sometimes bad). A fiber laser cutter can handle metal, alloys, plastics, glass, and wood with ease.
A CO2 laser uses a combination of inert gases and carbon dioxide (CO2, hence the name) to cut through material. It’s a simpler laser cutter, but they require a constant supply of gas to keep them running.
They’re especially good with non-metal materials, but they can handle aluminum and stainless steel sheets without any issues. They require more upkeep, especially in keeping the lens clean so you get a clean cut every time.
Their lifetime is a little shorter than fiber lasers, but much longer than crystal laser cutters.
The final option is the crystal laser cutter, which is also the most high-tech. It uses one of two high-power cutting devices, either Nd:YAH or Me:YVO (you don’t need to understand these acronyms at all). The machine is a lot more expensive than the other two cutters, and it lasts the least amount of time before major repairs are needed — anywhere from 8,000 to 15,000 hours.
Since they’re so high-tech, it shouldn’t be a surprise that this laser cutter can handle almost anything you put under it. It can handle thicker aluminum, stainless steel, cast iron, titanium, and plenty of non-metals (including ceramics).
For more information, please visit HANMA LASER.
Why would you choose laser cutting for your next sheet metal project? There are a few major benefits.
There are a few downsides to discuss as well.
We just finished reviewing the fundamentals of sheet metal laser cutting. This technology can deliver high accuracy and fast turnarounds for your parts, and it’s a great alternative to CNC machining for sheet metal parts and assemblies.
Sheet metal laser cutting machines have revolutionized the manufacturing and fabrication industry. These machines provide high precision, fast speed and versatility, making them essential for various applications from automotive to aerospace. However, for beginners, operating a sheet metal laser cutting machine may be daunting. Here are 10 essential tips to help you get started and ensure you use your machine effectively and safely.
Before diving into the operation, it's crucial to know how laser cutting works. Laser cutting uses a laser beam to cut through materials. The beam is focused on a small area of the material, causing it to melt, burn or vaporize, resulting in a precise cut. Familiarize yourself with the machine's components, including laser generator, laser cutting head and control system.
Safety should always be your top priority. Laser cutting machines can be dangerous if not handled properly. Always wear appropriate safety items, such as safety glasses and gloves. Ensure the cutting area is well-ventilated to avoid inhaling harmful fumes. Follow the manufacturer's safety guidelines and never bypass safety features.
Different materials require different laser settings. As a beginner, start with basic materials like mild steel, stainless steel or aluminum. Each material has its unique properties, and understanding how your machine interacts with these materials will help you achieve better effects. Consult the machine's user manual or material database for optimal settings.
Proper calibration is essential for accurate cuts. Ensure laser beam is correctly aligned and the focus is adjusted for the thickness of materials you're cutting. Regularly check and maintain the machine's calibration to avoid deviations that could affect the quality of your cuts.
Laser cutting involves several parameters, such as laser power, speed and gas pressure. Carry out experiments with these settings to find the optimal combination for your material and desired cutting quality. Most machines come standard with preset parameters, but fine-tuning them can significantly improve your results.
The quality of your cuts heavily depends on the accuracy of your design files. Use reliable CAD software to create your designs and ensure they are compatible with your laser cutting machine. Pay more attention to details like line thickness, font selection and spacing to avoid potential issues during cutting.
Like any other machine, sheet metal laser cutter also requires regular maintenance to achieve optimal functions. Clean lenses and mirrors to prevent dust and debris from affecting the laser beam. Check for wear and tear on consumables like nozzles and replace them as needed. Regular maintenance can extend the life of your machine and maintain cutting quality.
As a green hand, start with simple projects to build your confidence and skills. Cut into basic shapes at the very beginning and gradually move on to more complex designs. This approach allows you to understand the machine's capabilities and limitations without the frustration of tackling overly complicated projects too soon.
Mistakes are part of learning. When something goes wrong, analyze what happened and how you can prevent it in the future. Keep a log of your settings and results to track your progress and learn from both successes and failures. Don't be discouraged by mistakes, but use them as opportunities to get improved.
Many manufacturers and suppliers offer training and support for their sheet metal laser cutters. Take advantage of these resources to enhance your knowledge and skills. Join online forums and communities where you can ask questions, share experiences and learn from other users. Continuous learning is key to mastering laser cutting.
Operating a laser sheet metal cutting machine can be challenging for beginners, but with the right knowledge and approach, you can quickly become proficient. Knowing the basics, prioritizing the safety, choosing the right materials and optimizing your machine's settings are essential steps to achieving high-quality cuts. Regular maintenance, starting with simple projects, learning from mistakes and seeking support will further enhance your skills and confidence. By following these 10 tips, you'll be well on your way to mastering your laser sheet metal cutting machine and unlocking its full potentials.