When machining aluminum with CNC machine tools, how to make the size more stable?

When machining aluminum with CNC machine tools, how to make the size more stable?

In the process of machine tools, there will always be problems, zui near some machine tool users in the background messages to the editor, asking how to use numerical control machine tools to process aluminum, how to make the size more stable. Thank you for your comment. We hope this article can be helpful to the industry.

Characteristics of aluminum

Before doing the processing, we should first understand the characteristics of the materials to be processed, so that we can design the processing program more specifically.

Aluminum is a light metal with soft texture, low melting point and easy to oxidize. It should be noted that although pure aluminum is easy to oxidize, the resulting alumina structure is very compact and has stable chemical properties. The mechanical properties of aluminum are enhanced by the addition of other metals. Aluminum used in engineering is usually aluminum alloys, such as aluminum magnesium alloys commonly used in aircraft.

Aluminum and aluminum alloys have a wide range of applications. Aerospace, home appliances digital, automobile manufacturing and other industries can see their shadow. In addition, aluminum is also one of the common materials in machining.

Attention should be paid to aluminum processing

When machining aluminum with a numerical control machine tool, it is important to pay attention to these points to make the machining size more stable.

1. State of machine tool. Whether the machining is stable or not largely depends on the status of the machine tool itself. In such cases, the servo motor, lead screw, nut and other parts can be checked and the machine tool can be debugged.

2. Material cooling problem. The workpiece may deform after cooling. This situation is often unavoidable, and special attention should be paid to the use of coolant. The possibility of material deformation should also be considered in the in-situ measurement.

3. Processing technology. The size error of the workpiece is easily caused by the unreasonable processing technology. On the basis of ensuring the basic processing technology (such as "first rough then fine, first surface after hole, first large surface after small surface" or "reduce the clamping times and use combined clamping device as much as possible"), the machining error caused by iron filings to aluminum parts should be minimized.

4. Parameter setting. Cutting speed, feed amount, cutting depth and tool compensation all affect the stability of machining.

5. Tool selection. As far as possible when processing aluminum use special tools, such tools tend to be more targeted. Milling cutters, such as those used for milling aluminum, usually have larger front and spiral angles, sharper cutting edges, better machining of aluminum parts (such as anti-chip nodules), and better surface quality.

6. Stress. Aluminum material material is soft, so it needs to pay attention to mounting strength. In addition, during processing, it is better to leave zui open after finishing, and then proceed to the next process to eliminate the stress.

In addition, aluminum in the processing also need to pay attention to chip removal and the use of cutting fluid. There are many factors affecting the stability of aluminum processing, so it is necessary to be flexible in processing.