Ordinary lathes are widely used in machinery manufacturing enterprises, accounting for about 65% of the total number of lathes. They are also called horizontal lathes because their spindles are placed horizontally. Ordinary lathes have strong working ability and can provide high-precision, high-level Machinery manufacturing services, but the usual use still faces the interference of faults, such as noise faults and heating faults.
Noise failure not only affects the operation of ordinary lathes, but also affects the operating environment of the lathes. In general, noise is the premise of failure. When ordinary lathes are running, there is abnormal noise, which means that the lathe has failed. Maintenance personnel need to accurately analyze the source and cause of the noise in order to quickly eliminate the fault. After the ordinary lathe is running, the noise will increase with the increase of cycle, temperature and load, which will eventually lead to the lathe into a bad operating state and interfere with the normal operation.
The elimination of noise faults should be carried out according to the actual situation of ordinary lathes. Among the noise faults of ordinary lathes, the common troubleshooting methods are:
- The maintenance personnel check the kinematic pair of the ordinary lathe, adjust and repair the parts that cause noise in combination with the feedback from the kinematic pair, so that the main shaft of the lathe can be restored to normal, deal with the interference of noise, and ensure the working accuracy of the lathe;
- Comprehensive inspection of the pipelines of ordinary lathes, to prevent the occurrence of unobstructed pipelines, and to clear the blocked pipelines;
- In the noise failure, a large part is due to mutual friction, so regular lubrication work is arranged, and lubricating oil is added at appropriate locations. , Control the amount and location of lubricating oil to ensure that the lubricating oil meets the relevant regulations.
When an ordinary lathe is running, the heat failure is concentrated in the spindle position. Because the spindle is connected with rolling and sliding bearings to form an integrated operating structure, when the spindle rotates at a high speed, heat will be emitted. The main shaft is the main heat source of ordinary lathes. When the heat cannot be dissipated normally, it will cause excessive heating of the main shaft and the surrounding connecting devices, and the temperature of the local position of the lathe will rise, causing thermal deformation problems. When the heating failure is serious, the main shaft will appear. , The problem of different heights of the tailstock will directly reduce the machining accuracy of the lathe, and there will also be a case of burning out the spindle.
The main shaft heating failure may be due to the accumulation of heat after long-term friction between the main shaft and the bearing, resulting in the change of the stiffness of the main shaft under the working state of the full-load lathe, which affects the stability of the main shaft. In the troubleshooting method of the spindle failure, before the lathe runs, it is necessary to actively adjust the distance between the spindle and the bearing, and at the same time arrange the lubrication work to maintain the smoothness of the oil circuit, and then control the workload of the spindle to avoid the spindle in an overloaded work environment.