Common problems of machining centers

The common problems of machining centers mainly include mechanical failures, processing defects and operational errors. The specific manifestations and solutions are as follows:

Mechanical system failure

1.  the main shaft stops rotating

   It may be caused by incorrect start-up sequence (such as starting the spindle first and then turning on the control system), unreasonable setting of cutting parameters (load exceeding the rated range of the spindle), or abnormal lubrication of the bearings. It is necessary to operate in accordance with the specifications, adjust the parameters and ensure that the bearings are clean. ‌

2. Spindle overheating/precision decline

   Dust mixed in the grease, a decrease in the preload of the bearing or poor conical hole fit can cause the main shaft to heat up and the rotational accuracy to decline. The bearings need to be replaced, the grease reapplied and the contact area of the conical holes adjusted.

3. The steel ball of the pull rod is damaged

   A malfunction of the gas-liquid booster cylinder may cause damage to the steel balls of the pull rod. It is necessary to clean the booster cylinder, replace the sealing ring and inject oil.

manufacturing deficiency

1.  ‌workpiece overcutting

        Insufficient tool rigidity, uneven cutting allowances or improper parameter Settings can lead to overcutting. Appropriate cutting tools should be selected, the allowance adjusted and the cutting parameters optimized.

  2. Dimensional accuracy issue

Guide rail wear, incorrect tool compensation or inaccurate fixture positioning can lead to dimensional deviations of the workpiece. The machine tool needs to be calibrated, the tool reset and the fixture inspected.

  3. Poor surface roughness

Tool blunting, overly rapid feed or insufficient cooling can lead to non-compliance with roughness standards. The cutting tools need to be replaced, the feed rate reduced and the cooling system ensured to be functioning properly.

operate miss

1.  program error

        Insufficient safety height, mismatch between the tool and the program, or incorrect coordinate Settings may lead to a collision. It is necessary to check the program sheet, measure the height of the workpiece and standardize the programming.

  2. Human operation is not standardized

Failure to start the equipment in sequence or incorrect parameter Settings can cause malfunctions. It is necessary to strictly follow the operation norms to ensure the completeness of the self-inspection process.

precautionary measures

Regularly check the accuracy of the machine tool (such as spindle runout and lead screw clearance)

Maintain the lubrication system (regularly replace grease and clean dust)

Optimize cutting parameters (avoid overloading, and set rotational speed and feed reasonably)