CNC machining is a high-precision and high-efficiency manufacturing technology, but it requires strict compliance with specifications during operation to ensure safety and processing quality. Here is a summary of the key considerations:

First, preparation before processing

1. Material inspection

Confirm that the material type, size, hardness and heat treatment state meet the requirements of the drawing to avoid processing failure due to material problems.

2. Verification of drawings and procedures

Check drawing dimensions, tolerances, process requirements to ensure that G code or CAM program is correct (path can be checked by simulation software).

3. Fixture and tool preparation

Select the appropriate fixture to ensure stable workpiece clamping; Tool configuration (type, size, coating, etc.) according to machining requirements.

2. Setting of processing parameters

1. Cutting parameters optimization

Adjust cutting speed, feed rate and depth of cut according to material, tool and machine performance to avoid overloading or excessive tool wear.

2. Cooling and lubrication

Rational use of cutting fluids (such as emulsion, oil-based coolant) to reduce thermal deformation and extend tool life; Complex processing requires coolant coverage.

Third, clamping and positioning

1. Workpiece fixed

When using vise, clamping plate or special fixture, ensure that the clamping force is uniform to prevent the workpiece from shifting or deformation.

2. Locate the baseline

Clear machining datum, use edge finder or probe accurate positioning, reduce coordinate system deviation.

Four, tool management

1. Tool wear monitoring

Check the blade wear condition regularly (such as chipping, chip nodules), and replace or sharpen the tool in time.

2. Tool matching

High-strength tools for roughing, high-precision tools for finishing; Avoid loss of accuracy due to repeated use of worn tools.

5. Safety operation specifications

1. Personal protection

Wear goggles, gloves, tight work clothes, do not wear jewelry or long hair.

2. Machine safety

Check the effectiveness of protective door and emergency stop button before starting; Do not touch the rotating spindle or chips.

6. Processing monitoring

1. Real-time observation

Monitor abnormal noise (such as tool breaking) and observe chip color (too deep may indicate overheating).

2. Chip treatment

Clean the chips in time to prevent winding the tool or scratching the workpiece surface.

7. Quality testing and recording

1. First piece inspection

After the first part is processed, the size, shape and position tolerance will be comprehensively tested, and mass production will be carried out after the qualification is confirmed.

2. Process sampling

Regular sampling of key dimensions to avoid mass scrapping; Use micrometer, coordinate and other tools to measure.

3. Data recording

Record machining parameters, tool life and problems for easy traceability and process optimization.

Maintenance and maintenance

1. Routine maintenance

Clean up the chip inside the machine after processing, check the lubrication of guide rail and lead screw.

2. Regular maintenance

Replace the hydraulic oil and filter according to the manual, calibrate the accuracy of the machine tool, and prevent the performance degradation caused by long-term use.

9. Other precautions

Program trial run: The new program needs to run empty or single step to verify that the path is collision free.

Complex workpiece strategy: multi-process processing, reserve finishing allowance, reduce stress and deformation.

Environmental control: Maintain a constant temperature workshop during high-precision processing to avoid thermal expansion and contraction affecting the size.

Summary: CNC machining needs to take into account the rationality of the process, operation and equipment maintenance, through strict preparation, process monitoring and post-testing, in order to efficiently produce high-quality workpieces. Operators need to continuously accumulate experience and flexibly respond to different processing scenarios.