In my last (and very first) installment I described what we manufacture: Miniature Precision Aluminum Extrusions. Now let’s talk about what we can do with an aluminum extrusion once it’s been created.
Most of our customers would like to have parts ready to be assembled. As a result, we offer many value added services. Some examples are:
- Cutting,
- CNC Machining
- Anodizing
- Centerless Grinding
- Tumble Debur
- Laser Part Marking
You can follow this link to see examples: http://profileprecisionextrusions.com/services-fabrication.html
Many customers have us cut their parts to length. For cut lengths less than 48” we generally utilize our (2) precision saws. These saws can hold tolerances to +/-.005” or less. For one customer, we cut 3 million parts / year that are .75” long. For another, we custom cut approximately 1.5 million of their extruded aluminum tubes 7” long.
Depending upon the application, cut parts require vibratory debur to remove saw burrs and sharp edges. They can lead to problems during assembly operations. They can also cause scratches and cuts if too severe. We try to limit burrs by choosing the correct saw blade for the parts being cut. Different blades are used depending upon alloy/temper, part geometry, and cut length.
Anodizing is an electro-chemical process that forms a durable, oxide coat on the surface of aluminum extrusions. Many of the parts we sell are anodized. Anodizing is used as a protective coating or as a way to enhance the appearance of the part. Many different colors are available for cosmetic applications. Anodized aluminum is used in a wide variety of applications from disposable medical devices, paintball guns, industrial tools and aircraft parts. More on anodizing can be found on our anodizing page: http://profileprecisionextrusions.com/aluminum-anodizing.html
Centerless grinding is a new service that we began offering in early 2009. It is a way to obtain tolerances on tube OD’s that is not possible with extrusion. Not even by us! Tolerances down to +/-.0005” are possible.
Laser part marking looks great on extruded aluminum shapes that have been color anodized. It’s a very flexible process. You can mark graphics just as easily & clearly as letters and numbers.
Many customers ask us to perform multiple operations. For our largest customer, we utilize a Swiss style CNC to precisely machine razor sharp surfaces onto the extrusion. The part is then cut to just over 7” long, and clear anodized. We inspect the finished parts using a 50X microscope before shipping them. The Swiss CNC allows us to obtain a high degree of accuracy and repeatability from part to part.
Lead times for each process vary, but a good rule of thumb is 1 week per process.
Tom Gilluly, Sales Manager