Sheet metal cutting aims to create finished or semi-finished products with precise edges. To limit the inevitable blanking burr, in Minifaber we are careful to use only adequate presses with non-slip sliding on the guides, carefully machined dies that always guarantee the best results of the various operations.
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Minifaber offers a state-of-the-art sheet metal cutting service thanks to the experience accumulated over years of activity and to the fleet of machines, consisting of 17 mechanical presses and 2 cleaning systems in line with them.
We perform blanking on sheets made of:
When designing the blanking dies, we accurately calculate the clearance between the die and the punch. This takes into account the thickness of the sheet, the type of material to be cut, the speed of the press and lubrication.
The material to make punches and dies must be chosen carefully according to the same criteria listed above. The steel mills are chosen among the best on the world market.
The mechanical processing of the active parts of the die is carried out accurately with high-performance machinery such as a 5-axis milling machine and electro-erosion with multiple trims.
All die parts are dimensioned to ensure maximum rigidity and precision.
In this way the pieces are ready to be used in a variety of sectors:
Only in-depth knowledge and experience can determine the clearance, shapes and dimensions of the punch and die. In fact, they must be able to move smoothly and precisely, respecting the construction criteria of the die and depending on the material to be blanked and the requirements of the customer's drawing.
The result is a flawless blanked sheet, while the machinery used is protected from premature wear.
If, during blanking, the clearance between the die and the punch is too high, the excessive space between the two elements causes the sheet metal edges to bend, round them and produce abundant burrs.
If, on the other hand, it is too low, the space between the two parts is reduced, the contact between the die and the punch causes rapid wear of the same and of the die in general, and the semi-finished or finished pieces have equally high burr due to drawing the sheet metal.
A very useful function is performed by the blank holder which avoids the lifting and bending of the sheet metal during blanking, while during the extraction of the punch which takes place in the return stroke of the press, it prevents the sheet from clinging to the punch and raised together with it.
Finally, for the blanking to work properly, the punch must be guided with precision by suitably machined plates:
How to be sure, then, to obtain state-of-the-art blanking? It is necessary to check that the cut edge does not have chips, that there is a small radius on the side where the punch enters and a small burr on the exit side of the punch.
Between the two sides on the thickness will be a blanked part and a torn part which are typical of blanking.
With all these precautions you will achieve:
You will get efficient and thoughtful service from New Hope Laser.
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).
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.
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