With the development of science and technology, mechanical manufacturing technology has undergone profound changes. As the social demand for product diversification is more intense, the proportion of multi-variety, small and medium-sized batch production has increased significantly, the use of traditional ordinary processing equipment has been difficult to adapt to the high efficiency, high quality, diversified processing requirements. numerical control machine can complete the processing of complex parts that are difficult to complete or cannot be processed by ordinary machine tools, so it is widely used in aerospace, shipbuilding, mold and other processing industries. When the size of the finished product is wrong in the actual numerical control machine, how will we solve it?
1. The connection between the servo motor shaft and the lead screw is loose, causing the lead screw pre-motor to be out of sync and dimensional error. Only mark the coupling between the servo motor and the lead screw when testing. Move the table (or tool holder) back and forth with a faster rate, due to the inertia of the table (or turret), the two ends of the coupling will move obviously relative to each other. Such failures are usually realized as the processing size changes in only one direction, and can be eliminated by uniformly tightening the coupling screws.
2, poor lubrication between the ball screw and the nut, so that the movement resistance of the workbench (or tool holder) increases, and the movement instructions cannot be fully and accurately executed. Such failures are usually manifested as irregular changes in the size of the part within a few wires, and only need to improve the lubrication to eliminate the fault.
3. The moving resistance of the machine workbench (or tool holder) is too large, which is generally caused by too tight insert adjustment and poor surface lubrication of the machine tool guide rail. The fault phenomenon is generally manifested as the part size changes in the range of a few wires, and only the insert is re-adjusted and the guide lubrication is improved.
4, rolling bearing wear or improper adjustment, resulting in excessive movement resistance. The fault phenomenon is also usually manifested as an irregular change in size within a few wires. Simply replace the worn bearing and adjust it carefully, and the fault can be eliminated.
5, the lead screw gap or gap compensation amount is improper, by adjusting the gap or changing the gap compensation value can eliminate the fault.
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