extruded aluminum hat channel.Drilling Technology of Zinc Alloy Die Casting

　　1、 Drilling is the first process of processing holes on zinc alloy die-casting. There are two ways of drilling: one is drill rotation, the other is workpiece rotation. Common drilling tools include: Fried Dough Twists drill, center drill, deep hole drill, etc. 2、 Expanding holes is the process of further processing the holes in zinc alloy die castings using a reaming drill. Expanding holes can be used as a pre-processing or final processing for zinc alloy die castings. 3、 Reaming is a program for precision machining of holes, which has a wide range of applications in production. There are two types of tools for reaming: hand reamers and machine reamers. When performing reaming operations, appropriate cutting fluids must be used for cooling, lubrication, cleaning, and timely removal of chips. 4、 Boring, there are three different processing methods for boring, which are workpiece rotation, tool rotation, and tool rotation with feed motion

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