Failure Analysis Of Electric Actuator Of Shot Blasting Machine

         Whether the electric actuator of the shot blasting machine can operate reliably, and whether it can complete the specified functions within the specified time and under the specified conditions, the key lies in its performance indicators. The performance index is generally expressed by the mean time between failures MTBF, which includes parameters such as basic error, hysteresis, damping, and dead zone. These parameters reflect to some extent the performance of the electric actuator of the shot blasting machine.

         1. Main performance indicators and current problems

         Relevant technical parameters of the electric actuator of the shot blasting machine: the number of input channels is 1, the resistance is 250Ω the basic error is 1%, the hysteresis is 1.5%, the dead zone is adjustable from 0.5% to 3%, and the damping characteristics are not disturbed. Although some technical parameters of the electric actuator of the shot blasting machine can be compared with foreign counterparts, due to the restriction of the imperfect operation mechanism of domestic production enterprises, there are also the following drawbacks:

         (1) Ignore the research and development of basic technology of shot blasting machine;

         (2) The quality of the general components of the shot blasting machine is not high;

         (3) The enterprise has lax quality management of shot blasting machine production.

         2. Failure analysis

         1. Early stage of shot blasting machine operation

         The initial stage of operation is a run-in period. The faults that occurred during this period are more complicated, and the reasons are many, such as selection problems, design and manufacturing problems, or installation and environmental problems. If the torque is selected too small, it may affect its adjustment speed or even impossible to adjust at all.

         There are the following in practical applications: The design did not pay attention to the firm connection between the connecting rod and the actuator, and the phenomenon of shedding occurred; the power line and the signal line were installed with the same threading tube, which caused large signal interference; there were unshielded nearby Large motor equipment has an impact on the stable operation of the motor; the insurance selection of the position locator is too large, causing damage to its internal choke coil. These problems must be observed in time, discovered and dealt with in time to avoid unnecessary losses.

          2. Mid-operation

          In the middle of the shot blasting machine's operation, the overall performance of the shot blasting machine's electric actuator has also changed from the running-in period to the adaptation period, and the performance is relatively stable at this time. Crawler shot blasting machine high-strength wear-resistant rubber crawler or manganese steel crawler loading workpiece. It uses a high-speed rotating impeller to throw projectiles onto the workpiece in the chamber to achieve the purpose of cleaning. It is suitable for sand removal, rust removal, scale removal and surface strengthening of small castings, forgings, stamping parts, gears, springs, etc. It is especially suitable for cleaning and strengthening parts that are not afraid of collisions. Most of the problems that arise are the quality problems of individual electronic components. Such as position current converter TAM2, intermediate contactor K1, K2, over-torque micro switch, etc.

          3. Late operation

          In the later stage of operation, the aging problems of components and the wear of transmission parts began to become extremely serious. For example, the aging of the motor coils caused the insulation to decrease and unstable operation; the poor lubrication of the motor reduced the stability of operation; the comparative coil of the positioner was aging or The aging of the position current converter reduces the positioning accuracy; the wear of the transmission parts of the reducer causes the electric mechanism of the shot blasting machine to be unable to adjust, and so on. For these problems, you should check regularly to prevent major failures. Of course, among all the fault factors, there are also factors such as artificial stepping, process baffle jamming, and process misoperation in actual operation.

          4. Maintenance

          Starting from the actual experience of the maintenance personnel of the shot blasting machine, the maintenance of the electric actuator of the shot blasting machine should take different key maintenance measures according to its different periods of use. We usually do the following:

Regular lubrication: The motor and transmission parts of the electric actuator of the shot blasting machine need to be lubricated with lubricating oil, and the viscosity of the lubricating oil changes with the oil temperature. If the viscosity is too low, the wear of gears and other transmission parts will increase; if the viscosity is too high, the operation will be poor. Therefore, regular lubricating oil can extend its service life.

          Improve the operating environment: In order to ensure the reliability of the electric actuator of the shot blasting machine, it must be ensured that it runs in a suitable operating environment to avoid short circuits or other failures caused by other environmental factors such as humidity. Crawler shot blasting machine high-strength wear-resistant rubber crawler or manganese steel crawler loading workpiece. It uses a high-speed rotating impeller to throw projectiles onto the workpiece in the chamber to achieve the purpose of cleaning. It is suitable for sand removal, rust removal, scale removal and surface strengthening of small castings, forgings, stamping parts, gears, springs, etc. It is especially suitable for cleaning and strengthening parts that are not afraid of collisions.

          Regular inspections: regular inspections to discover hidden dangers in operation in time, at least helpful for finding fault factors and avoiding detours. Crawler shot blasting machine high-strength wear-resistant rubber crawler or manganese steel crawler loading workpiece. It uses a high-speed rotating impeller to throw projectiles onto the workpiece in the chamber to achieve the purpose of cleaning. It is suitable for sand removal, rust removal, scale removal and surface strengthening of small castings, forgings, stamping parts, gears, springs, etc. It is especially suitable for cleaning and strengthening parts that are not afraid of collisions.

          Do a good job in the management of the failure account: every failure handled should be recorded in detail, including failure phenomenon, failure analysis and search process, failure reason, treatment method, preventive measures, etc. This not only provides reference value for dealing with similar problems in the future, but also improves the level of finding fault factors through the fault curve, achieving a multiplier effect with half the effort.