Cause analysis of vibration of NC lathe
The vibration of CNC lathe in the cutting process is very complex, and there are several reasons for the vibration. After analysis, it mainly includes the following aspects:
(1) The shape of the workpiece is complex, and the selection of clamping parts is not enough: the shape of the workpiece is irregular, there is a good reference surface, and there is no suitable fixture. During the machining process, with the change of cutting force, the blade is not tight, it is easy to loosen and produce corresponding vibration.
(2) The internal structure of the workpiece is uneven, and the white drain has local defects, such as blisters, air gap, coarse grain or impurities. When cutting soft or hard tools are not tightened evenly, which makes the cutting force unstable, which makes the CNC lathe vibrate and sometimes leads to the cutting blade. The processing quality of parts is also difficult to control.
(3) Unreasonable tool selection: improper tool body material and poor stiffness are one of the main reasons for vibration. If the wrong tool is selected, it will sometimes aggravate the wear of the tool or lead to tool fragmentation, pull the workpiece surface or cause blade vibration, and affect the product quality.
(4) Insufficient selection of cutting quantity and CNC machine tool speed: 1. Cutting speed 1000 The cutting speed is directly proportional to the workpiece surface diameter and workpiece speed. Pieces. When? D constant timing, the faster the speed, the faster the cutting speed, and the greater the possibility of vibration.
(5) Influence of CNC machine tool status. The lack of accuracy of CNC machine tools is also an aspect of vibration. The bearing precision of gear and CNC lathe head is low, the guide rail is worn, and the clamping device is lack of reliability, which may lead to vibration during cutting.