Due to the popularity of aluminum alloy materials, aluminum machining parts are now widely used in many industries, such as: automotive, medical equipment, household appliances, compare with other metal materials, both in the cost of materials and processing technology are great advantage. Aluminum prototypes instead of other metal prototypes are also often used as a test to verify the design structure and shape, because of the low cost, easy processing. For example, sometimes the designer will choose to use aluminum instead of zinc alloy, in order to save the cost of developing products. At the same time, aluminum parts can [...]