What spare parts are needed for DC motor motor automatic oven machine and how should I set up a guaranteed stock?
1、Spare parts list
l Heating elements: such as heating tubes and heating wires. These components may be damaged after a long time of use, resulting in uneven heating or inability to heat.
l Temperature Sensor: Used to monitor the temperature inside the oven. As its working environment may have high temperature, humidity changes and other factors, the sensor is prone to malfunction, affecting the accuracy of temperature control.
l Brushes of DC motor motor (if it is a brushed motor): brushes are easy to wear parts of the motor, regular replacement of brushes can ensure the normal operation of the motor.
l Transmission parts: including belt, chain (if it is belt or chain drive), gear (if it is gear drive). These parts are subject to wear and looseness in the course of long-term use.
l Sealant: Used to seal the oven door. Deterioration or damage to the sealing tape will lead to heat loss, affecting the efficiency of the oven, and there may be a potential safety hazard.
l Fuse: When there is an overload or short circuit, the fuse will blow to protect other parts of the equipment. This is a one-time protection element, need to spare some in order to replace in time.
l control circuit board on the commonly used electronic components: such as capacitors, resistors, relays and so on. These components may be damaged due to aging, overvoltage and other reasons, spare some can be convenient for maintenance.
2、Safeguard inventory setting method
l According to the frequency of use of equipment and component life to determine the base stock
For heating elements, the calculation is based on the usage time of the equipment and the average service life of the heating elements. For example, if the average service life of the heating element is 1,000 hours, and the equipment is used 8 hours a day, then a heating element may need to be replaced about every 4 - 5 months. Based on this data, a guaranteed inventory can be determined, taking into account the importance of the equipment and the maintenance response time. For example, stock 2 - 3 heating elements as a guaranteed inventory.
The life of temperature sensors can be greatly affected by environmental factors. Generally, it is possible to stock 2 - 3 of these as a guaranteed stock at a frequency of 1 - 2 replacements per year.
For DC motor brushes (in case of brushed motors), the replacement cycle is usually around 3 - 6 months. Depending on the number of motors and their usage, stock enough brushes to replace all of them at one time as a guaranteed stock.
For transmission components, belts and chains can be stocked based on their wear and replacement cycles. For example, if the average replacement cycle for belts is 6 months, stock 1 - 2 belts as a guaranteed inventory. For gears, a spare set of gears can be stocked as they have a relatively long service life but take longer to repair once damaged.
Sealant strips are replaced relatively infrequently, about once a year, so reserve 1 - 2 sets of sealant strips as a safeguard stock.
Fuses are stocked according to their probability of blowing and the importance of the equipment. Generally, 5 - 10 fuses are stocked as a safeguard stock.
For the commonly used electronic components on the control circuit board, according to the past maintenance experience and the failure rate of the components, reserve about 5 - 10 sets of each component.
Consider Maintenance Response Time and Equipment Downtime Costs
If the maintenance personnel can quickly obtain spare parts, the safeguard stock can be appropriately reduced; on the contrary, if the time to obtain spare parts is longer, or the cost of equipment downtime is very high, it is necessary to increase the safeguard stock. For example, if one day of equipment downtime will cause a large production loss, then the guaranteed inventory for critical components (such as heating elements, motor brushes, etc.) can be doubled.
l Regular inventory and adjustment of inventory
Regularly (e.g. quarterly) inventory of spare parts inventory, check whether the inventory quantity meets the requirements, and at the same time according to the use of equipment, component replacement and maintenance records and other factors, the number and type of guaranteed inventory to be adjusted. For example, if the failure rate of a component is found to be higher than expected, the safeguarded inventory of that component needs to be increased; if a new, more reliable component replaces the original component, the inventory of the original component can be appropriately reduced.
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