What spare parts are needed for the automatic rotor bearing press-in machine for brushless motors and how to set up the guarantee stock?
In order to avoid equipment downtime due to damage of parts in the daily operation of brushless motor motor automatic rotor bearing press-in machine, it is very important to reserve suitable spare parts and set up a reasonable guarantee stock. The following is a detailed description of the required spare parts and the method of setting up the safeguard stock:
First, the need for spare parts
1、Mechanical
Indenter: directly contact with the bearing to complete the press-in action, easy to wear or damage in long-term use, different specifications of the rotor may require different types of indenter, need to stock a variety of specifications.
Fixture: It is used to fix the rotor and bearing to ensure the positional accuracy in the press-in process. The jaws and other parts of the fixture are easy to wear, and it is necessary to stock fragile jaw components or a complete set of fixtures.
Bearings: All kinds of bearings used in the transmission parts of the equipment itself, such as the bearings of the silk rod, guide rail and other parts, will affect the running accuracy and stability of the equipment after wear and should be stocked with commonly used models.
Belt and chain: as transmission components, after a long period of operation will appear wear, elongation or breakage, need to reserve the appropriate specifications of the belt and chain.
Guide rail slider: Provide accurate guidance for press-in action, the wear of the slider will affect the precision of press-in, need to stock the guide rail slider components or slider accessories.
2、Electrical
Contactors and relays: Used to control the on-off of the circuit, frequent action will easily lead to contact wear or coil failure, need to stock different rated current and voltage contactors and relays.
Sensors: such as pressure sensors, displacement sensors, position sensors, etc., are used to monitor key parameters in the press-in process. Failure of the sensors will lead to a decrease in the indentation accuracy or the equipment will not operate normally, so the commonly used models should be stocked.
Control board: As the control core of the equipment, once a failure occurs, the equipment will not work normally. Because of the difficulty of repairing the control board, it is usually necessary to reserve spare control boards.
Fuse: in the circuit overload or short-circuit protection, is a wearing parts, need to reserve different specifications of the fuse.
Motor: drive the mechanical movement of the equipment, motor failure will lead to equipment can not run, need to reserve power and model matching motor.
3, hydraulic class (if the equipment using hydraulic system)
Hydraulic pump: to provide power for the hydraulic system, long operation may be wear and tear, leakage and other faults, need to reserve the appropriate hydraulic pump.
Solenoid valve: control the flow of hydraulic oil and pressure, failure will lead to the hydraulic system can not work properly, should be stocked with commonly used models of solenoid valves.
Hydraulic seals: to prevent leakage of hydraulic oil, seal wear will lead to pressure drop in the hydraulic system, need to reserve a variety of specifications of the hydraulic seals.
Second, to protect the inventory setup method
1, based on historical data statistics
Collection of equipment over time (such as a year or several years) within the replacement of spare parts records, analyze the replacement frequency and quantity of each spare part. For example, if the indenter has been replaced 5 times in the past year, and 1 piece is replaced each time, the initial guaranteed stock of the indenter can be set to about 5 pieces.
Consider the seasonal or cyclical nature of failures. If some spare parts in a particular season or production peak replacement frequency is higher, you can appropriately increase the level of guaranteed inventory for the time period.
2, combined with the supplier supply cycle
Communicate with spare parts suppliers to understand their supply cycle. For a longer supply cycle (such as more than 1 month) of the spare parts, should set a higher guaranteed inventory to ensure that when the spare parts are damaged, there is enough time to wait for the arrival of new spare parts.
Evaluate the reliability of suppliers, including product quality, on-time delivery, etc. For suppliers with low reliability, increase the guaranteed stock to cope with possible supply delays.
3, consider the importance of the equipment and production schedule
If the press-in machine is a key piece of equipment in the production line, downtime will have a serious impact on the entire production, should set a higher guaranteed inventory to reduce equipment downtime.
Predict the frequency of use and running time of the equipment according to the production plan. If the recent heavy production tasks, the equipment needs to run continuously for a long time, you can appropriately increase the guaranteed inventory of spare parts.
4, the use of mathematical models
You can use some classic inventory management models, such as economic order quantity model (EOQ), guarantee inventory formula. Guaranteed inventory formula for, which is the guaranteed inventory, for the coefficient associated with the level of service (such as the level of service is 95%, about 1.65), for the standard deviation of the demand in the lead time. Through the statistics of historical demand data, the standard deviation of the demand in the advance period is calculated, combined with the desired service level, the guaranteed stock can be calculated.
When setting up the guaranteed inventory, the above factors should be taken into consideration and the level of guaranteed inventory should be evaluated and adjusted periodically to ensure that the demand for equipment maintenance can be met while avoiding cost wastage caused by inventory backlog.
※ If you need any help, please contact the technical specialists of Xinhui Electromechanical Equipment Co., Ltd. via the page chat tool for assistance.
