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What is the purpose of CNC machining?

What is the purpose of CNC machining?

CNC machining, also known as CNC machine tool machining, refers to the processing carried out using CNC machine tool processing equipment. Due to the fact that CNC machine tool processing is controlled by a computer after programming, CNC machining has stable quality, high accuracy, complex surfaces, and high processing efficiency. In the specific processing process, human factors and practical operating experience largely ensure the final processing quality.


1 How to divide CNC machining processes?

The division of CNC machining process flow for CNC machine tools can generally be carried out in the following ways:

1. According to the commonly used cutting tools, divide the process flow and use the same cutting tool CNC to process all possible positions on the part. Use the second and third knives to execute other positions that they can execute. This can reduce the frequency of tool changes and reduce the empty tool time.

2. According to its structural characteristics, the processed parts are divided into many parts, such as internal shape, appearance design, slope or plane, etc. Generally, the plane and precise positioning surface are processed first, and then the hole is processed; First process simple geometric shapes, then process complex geometric shapes; First process low precision positions, then process high precision positions.

3. The rough and precise CNC machining sequence method is used to calibrate the shape of parts that are prone to CNC machining deformation due to possible deformation after rough machining. Therefore, generally speaking, rough machining and precision machining require a separate process flow. Generally speaking, when partitioning the process flow, attention must be paid to the structure and process performance of the parts.

2 What standards should be followed for the allocation of CNC machining sequences?

The allocation of processing sequence should be determined based on the structure and blank of the parts.

1. The CNC machining of the previous process should not endanger the precise positioning and clamping of the next process. If there is a universal CNC lathe machining process in the middle, it should be comprehensively considered.

2. Firstly, the inner wall processing process is carried out, followed by the appearance design processing process.

3. The CNC machining process with the same precision positioning, clamping method, or the same tool should preferably be carried out through connections to reduce the frequency of repeated precision positioning, tool replacement, and pin movement.

3 What aspects should be paid attention to when determining the clamping method of the workpiece?

1. Ensure uniform design schemes, processing techniques, and programming calculation standards.

2. Try to avoid clamping frequency and ensure that all surfaces to be machined can undergo CNC machining after precise positioning.

4. The fixture opens smoothly, and its precise positioning and clamping mechanism will not endanger the tool movement in CNC machining (such as causing impact). In this case, you can choose to clamp with a vise or add a base plate and pull out the screws.

3. Prevent the use of machines from occupying manpower and adjust the plan.


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