Mill aluminum

Like other metals, aluminum can also be milled. Since the light metal but relatively soft, the resulting special features must be considered. Below you will find all the information you need to mill aluminum professionally.

To be considered when milling aluminum

Aluminum is milled for a wide variety of requirements. This ranges from mechanical engineering to the automotive industry to a wide variety of hobby applications and even jewelry made of aluminum. Never forget the face milling. As with milling of other metals and alloys, some factors are particularly important when milling aluminum:

  • aluminum alloy to be milled or its properties
  • Feed rate vf
  • Speed ​​n of the cutter
  • used milling head
  • the coolant lubrication

The aluminum alloy to be milled

As with steel or stainless steel, there are a variety of aluminum alloys. The fact that a workpiece consists exclusively of pure aluminum is rather the exception. However, most of the aluminum alloys are compounds with magnesium and silicate. But there are also alloys with copper, lead, manganese, etc.

Depending on the alloy, the present aluminum alloy then has a very good machinability, excellent welding properties, a special hardness and other properties. A metal worksheet should be part of the basic equipment to accurately determine the properties of such an alloy for milling.

The used milling head

In addition to the feed speed, the removal of the chips is crucial. Therefore, the chip space of the milling head should be as large as possible. This will automatically get you to cutting-milling heads. However, these are only conditionally suitable for milling aluminum.

Thus, there are single tooth cutters in a particular shape that are suitable, provided that the mill itself has a suitable hardness or alloy. As is usual with general milling of metals, it is also true for aluminum that the milling cutter should be as short and solid as possible (thick).

The coolant lubrication

Again and again is called by laymen alcohol or ethanol as a suitable coolant. However, there are easily inflammable vapors, which is why alcohol is not recommended. Instead, you should use a suitable aluminum cooling lubricant emulsion.

Speed ​​and feed during aluminum milling

Of course, if you want to do it exactly, you can calculate the exact feed rate and the right speed for aluminum milling. Here again helps the book on, as well as a corresponding formulary should be there. In addition, there are some applications online that calculate this data quickly.

If not available, one can assume the following minimum values:

  • Speed ​​for high-quality milling: 100 m / min
  • Feed approx. 0.1 mm per cutting edge (trimming cutter 0.1 mm, three-cutting trimmer 0.3 mm)

Correctly adjusted to the present aluminum alloy and equipped with the right tool, an accuracy of 1/1000 mm can be achieved when milling aluminum.

General information about milling

It is absolutely necessary to comply with the safety regulations, ie protective clothing, safety glasses, etc. Many laymen "forget" just the right protective clothing times. This can lead to the worst work accidents when garments wind up around the high-speed milling machine. That can mean absolute danger to life.

Tips & Tricks

In the house journal, we offer you numerous guides and instructions in the processing and processing of aluminum. For example, here's how to buckle aluminum or braze aluminum sheet.

Video Board: CNC Milling Aluminum Speed Machining