The precision of the machine tool directly determines the quality of the final processing yield. High-precision machining centers also play a key role in reducing defective products and reducing production material losses. As one of the most common processing equipment, the vertical machining center has been recognized by small and medium-sized processing enterprises in terms of processing efficiency and processing accuracy, and its cost performance is also significantly higher than other processing equipment.

What is the difference between a vertical machining center and an ordinary machine tool?

The obvious difference between a vertical machining center and an ordinary machine tool is the consistency of the batch processing scale of the workpiece. Compared with manual operation, the CNC operation completed by one clamping is naturally more accurate, but if the CNC parameter settings are deviated or improperly operated If so, the machining center will also have the problem of inaccurate accuracy. The following will introduce to you the possible machining accuracy problems and solutions.

Common precision problems and solutions of vertical machining centers

Poor orientation accuracy of reamed holes

The occurrence of this situation is generally caused by the wear of the guide sleeve of the machining center, the bottom end of the guide sleeve being too far from the workpiece, or the spindle bearing being loose. The solution is also relatively simple. Check the root cause of the problem and then prescribe the right medicine. , replace the guide sleeve or adjust the spindle bearing.

Rough inner hole

There are many reasons for the external roughness of the machined inner hole, such as high cutting speed, improper selection of cutting fluid, excessive reaming allowance, unsharp cutting edge, excessive wear of the reamer, the mismatch between the tool and the parts, etc., all of which will cause the inner hole. rough. To solve this problem, it is also necessary to analyze one by one, reduce the cutting speed, reasonably select the cutting fluid and tool, and replace the reamer regularly.

The inner hole of the machined part is not round

Too long reamer, too small main declination angle of reamer, too small reaming allowance, defect gap on the surface of inner hole, the loose bearing of machine tool spindle, etc., will cause the problem that the inner hole of the part is not round. The solution is to select a qualified reamer, select a qualified blank, effectively control the hole orientation tolerance, and adjust the machine tool spindle in time.

The center line of the reaming hole is not straight

The center line of the reaming hole in the vertical machining center is not straight. Most of the reasons are that the rigidity of the reamer cannot correct the tortuosity, the main declination angle of the reamer is too large, the guidance is poor, the cutting part is too large, etc., and it is necessary to increase the reaming. Or the boring process to correct the hole, reduce the main declination angle, reasonably select the reamer and other measures to correct the treatment, and also pay attention to maintaining the correct operation process.

Conclusion

As the saying goes, there are no machine tools without failure, only machine tools with low failure rate. As long as you maintain good operating habits and maintain routine maintenance measures for equipment in daily processing operations, you can ensure the normal operation of the machining center. Accuracy is naturally guaranteed to a certain extent.

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