Maintaining the thread accuracy of a tapping machine over the long term requires multi-faceted management, including mechanical maintenance, system calibration, operating procedures, and environmental control. Specific measures are as follows:

Mechanical Maintenance and Calibration

‌ Bed Stability‌: Check the bed's levelness with a spirit level every six months (accuracy 0.02mm/m). If the level deviation exceeds 0.05mm/m, fine-tune it using the bottom adjustment bolts.

‌ Drive System Maintenance‌: Replace the lubrication system filter every three months. Clean the guideway guard weekly to prevent iron chips from entering the guideway gaps and causing scratches.

‌ Tool Management‌: Use a tool presetter to set tool length and radius compensation values. Replace each tool after 500 holes, or install a tool wear monitor for real-time alarms.

Parameter Optimization and Operating Procedures

‌ Cutting Parameter Control‌: Maintain a constant tapping speed (typically between 50 and 150 rpm). Avoid excessive speeds that cause uneven force distribution or excessive speeds that affect efficiency. Chip Evacuation Design: Spiral-flute taps are preferred to ensure smooth chip removal and prevent chip accumulation and chipping during vertical tapping.

Tap Angle Adjustment: For blind hole tapping, appropriately reduce the rake angle (0°-3°) and clearance angle (2°-4°) to enhance support and control friction during tool retraction.

Environmental and Process Control

Vibration Control: When installing the machine tool, provide anti-vibration grooves and fill them with sound-absorbing material to prevent vibration from other equipment in the workshop from being transmitted to the machine tool.

Cutting Fluid Use: Maintain sufficient cutting fluid and evenly cover the cutting area to reduce frictional heat and chip adhesion.

Regular Calibration and Compensation: Check backlash every six months (adjust parameters if exceeding 0.01mm) and calibrate tap position accuracy monthly using a dial indicator.