Diagnosis and Treatment of Unbalanced Fault of M131W Universal Cylindrical Grinding Machine Wei Xiaobing1, Zheng Xiaobing2, Wang Dianwu (1. Sichuan Weishan Vehicle Factory Brake Machine Branch Factory Weiban, Sichuan Meishan; 2. Guzhou City Laying vehicle factory equipment workshop, responsible for the state of the blame; 3. Henan Luoyang locomotive plant infrastructure, No. 2 Qiming East Road, Luoyang City, Henan Province) using the "table method" and "painting method" to eliminate the two abnormal vibration A possible situation, using instrumentation and using relative judgment criteria for analysis and comparison, confirmed that the abnormal vibration is due to the imbalance of the grinding wheel flange. The 217 type machine fault diagnosis instrument is used to dynamically balance the grinding wheel flange to eliminate the abnormal vibration fault of the outer grinding machine.
Key solid: grinding machine; vibration; unbalance; instrument; dynamic balance A M131W universal cylindrical grinding machine generates abnormal vibration when grinding the outer circle of the workpiece. In order to ensure the machining accuracy of the workpiece and eliminate the abnormal vibration, the fault analysis and diagnosis were carried out by the sensory diagnosis method and the 217 machine fault checker. See the main drive chain plane test chart.
After diagnosing possible vibration factors such as motor, belt drive and hydraulic system, the main reasons for determining the abnormal vibration outside the bed with the flat point can be the following three types: () the gap between the grinding wheel spindle and the sliding bearing is too large; The contact between the taper hole of the grinding wheel flange and the grinding wheel spindle is poor; () The grinding wheel has a uniform material, but the balance is not good.
In the first case, the measurement is performed by the “table methodâ€, and the vibration source that meets the assembly gap standard and non-abnormal vibration is confirmed.
In the second case, the "coloring method" is used to check the taper hole of the grinding wheel flange. The contact area meets the requirements and is not the cause of abnormal vibration.
In the third case, after checking the quality of the grinding wheel to meet the requirements, the 217 fault checker was used to check that the abnormal vibration was caused by the imbalance of the grinding wheel rotor.
Second, use the 217 type machine fault checker for simple diagnosis. Table 1) The analysis of the test value is compared with the moving value. After a lapse of 3 months, the ratio of the measured value of the horizontal measuring point is as high as 12.6 times. The ratio of measured values ​​can reach 12.8 times. According to the standard of Table 1, the multiple values ​​have exceeded the specified standard value, so it can be inferred that the fault is caused by imbalance. Secondly, the low frequency vibration value accounts for the main component, which fully proves the abnormality. The vibration is caused by the rotor imbalance.
1. The balance block 1 is fixed as a reference, and the block 3 is not moved. The adjustment block 2 is adjusted clockwise or counterclockwise along the ring groove until the rotor amplitude is minimum, for example, and the wheel rotor vertical and horizontal are measured. The Chinese industry recommended the comparison of the standard standard attention zone 3 times the anomaly zone 4 times 6 times the spectral iron spectrum analysis of the port machinery. Zhu Shaobing Pu Gang Lao Company, No. 667, Huangpu Gangqian Road, Guangzhou, Guangdong, China, 510700, 020-82153355) Lubricating oil spectrum and iron spectrum analysis are effective methods for port mobile machinery to carry out state maintenance, and are an important way for ports to improve production efficiency.
Key solid: spectrum; iron spectrum; application from Hong Kong since 2000, on the key machinery to carry out lubricant spectrum, iron spectrum analysis. Sampling and analysis of engine, gearbox and hydraulic system of 13 mechanical equipments of five types of machine such as front lifter, empty box forklift, tire crane, bucket truck and forklift, and timely maintenance and repair, not only ensured mechanical attendance The rate and the good rate have met the production needs of the terminal, effectively controlled the production cost, and accumulated a certain amount of data and information, providing a valuable experience for the comprehensive promotion of state maintenance work in the future.
The amount of metal contained in the lubricating oil increases with the use of the lubricating oil. The absolute value can only indicate the amount of wear, and the amplitude value of the direction is 4. The balance blocks 1, 2 are fixed, and the block 3 is adjusted until the rotor amplitude is minimum, for example, the amplitude values ​​of the vertical and horizontal directions of the rotor are measured.
The vibration value measured after two adjustments is compared with the standard value, which is less than or equal to the standard value, and is less than or equal to the standard value, and the equilibrium standard is reached.
(Finish)
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