Laser cutting, Metal Spinnings, metal pressings and fabrication from winward engineering : 0845 170 9881




T: 01922 744 645	F: 01922 744 646

Laser cutting and fabrication

laser cutting

winwardengineering are able to offer a comprehensive laser cutting service that will ernable your designs to be realised.

We can cut a large variety of metals including stainless steel, mild steel, titanium and many other precious and non-precious metals. We are also able to cut a variety of different types of materials such as wood and some acrylics and even glass components.

Our in house design capabilities mean that we can produce the CAD drawings that your designs and components may require. Alternatively you may prefer to supply us with your own drawing files which we can then transfer to the laser cutter.

At Winward we service both small and large batch laser cutting at very competetive prices.

Winward excell in producing finished components from start to finish, we can do this because of the wide variety of services we provide and cater for. Therefore whether you require only laser cutting or a complete finished component then Winward are part of your solution to meet all of your requirements.

Laser cutting machines can accurately produce complex exterior contours. The laser beam is typically 0.2 mm (0.008 in) diameter at the cutting surface with a power of 1000 to 2000 watts.

Laser cutting can be complementary to the CNC/Turret process. The CNC/Turret process can produce internal features such as holes readily whereas the laser cutting process can produce external complex features easily.

Laser cutting takes direct input in the form of electronic data from a CAD drawing to produce flat form parts of great complexity. With 3-axis control, the laser cutting process can profile parts after they have been formed on the CNC/Turret process.

Lasers work best on materials such as carbon steel or stainless steels. Metals such as aluminum and copper alloys are more difficult to cut due to their ability to reflect the light as well as absorb and conduct heat.

designconsiderations

• Lasers cut by melting the material in the beam path. Materials that are heat treatable will get case hardened at the cut edges. This may be beneficial if the hardened edges are functionally desirable in the finished parts. However, if further machining operations such as threading are required, then hardening is a problem.

• A hole cut with a laser has an entry diameter larger than the exit diameter, creating a slightly tapered hole.

• The minimum radius for slot corners is 0.75 mm (0.030 in). Unlike blanking, piercing, and forming, the normal design rules regarding minimum wall thicknesses, minimum hole size (as a percent of stock thickness) do not apply. The minimum hole sizes are related to stock thickness and can be as low as 20% of the stock thickness, with a minimum of 0.25 mm (0.010 in) for upto 1.9 mm (0.075 in). Contrast this with normal piercing operations with the recommended hole size 1.2 times the stock thickness.

• Burrs are quite small compared to blanking and shearing. They can be almost eliminated when 3D lasers are used and further, eliminate the need for secondary deburring operations.

• As in blanking and piercing, considerable economies can be obtained by nesting parts, and cutting along common lines. In addition, secondary deburring operations can be reduced or eliminated.

Laser Cutting Process

During laser cutting process, a beam of high-density light energy is focused through a tiny hole of the nozzle. When this beam strikes the surface of the work piece, the material of the work piece is cut immediately.

Lasers work best on materials such as carbon steel or stainless steels. Metals such as aluminum and copper alloys are more difficult to cut by laser due to their ability to reflect the laser light as well as absorb and conduct heat. These materials require more powerful lasers. Some of the materials that can be cut by laser cutting process are mentioned below.

Stainless steel	Gold	Hastelloy	Delrin	Laminates
Carbon steel	Silver	Zirconium	Nylon	Glass
Titanium	Aluminum	Ceramic	Wood	Rubber
Inconel 625	Cobalt	Polyethylene	Plywood	Leather
Nickel	Galvanized steel	Acrylic	Fiberglass	Paper

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winward engineering limited. 2008