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Your carburizing furnace is on FIRE! Maintain it properly!

August 15, 2019
By 猷绥
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Your carburizing furnace is on FIRE! Maintain it properly!

Friends in heat treatment industry knows that heat-treated equipment is dangerous. Improperly operated or maintained, the equipment has the risk of fire. Today we will introduce how weekly inspection help preventing carburizing furnaces from getting on fire.

1. Check furnace parts like pipelines, electrical cabinets, and computer screens, etc.

Clean the dust and oil stains in these parts, make them neat and tidy. During the cleaning process, expose potential risks of the equipment, and fix exposed issues.

2. Electrical cabinet filter

The AC filter on electrical cabinet filters and prevents dust from entering the cabinet, causing short-circuit. Therefore, the air filter must be cleaned every week to ensure smooth air flow to AC.

3. Pneumatic and Hydraulic Cylinders

Furnaces equip multiple types of cylinders to drive furnace door, lifting platform; chain driving clutch. As a key component, if improperly maintained, cylinders will leak, both internally or externally, leading to reduced driving force, which may cause serious accidents to the equipment.

Take the 10# furnace as an example. In normal circumstances, the lifting platform should complete down stroke in 9-13 seconds, otherwise, the hot parts will ignite oil. On the other hand, If the cylinder is leaking internally, the pulling force will inevitably be not able to overcome the weight of parts when they are transferred from the heating chamber to the oil tank lifting platform. and when the hot parts touch the oil surface, oil will be evaporated and ejected from the explosion-proof port, spilling all over the furnace and causing a major fire.

During weekly maintenance, after the cylinder is in place, check whether the silencer discharges air continuously. If so, the cylinder or the electromagnetic reversing valve is leaking, then empty furnace and fix leakages immediately to avoid accidents.

4. Silencers of cylinders

Silencers of cylinders might be blocked over time, if the gas source is not clean, resulting in jitter or slow movement of the cylinder. It is recommended to clean silencers every week. If silencer is still not ventilated after cleaning, replace it with a new one to ensure smooth running.

5. Media filters

In order to prevent from blocking of pipelines, filters are installed at all inlets; the compressed air, cooling water, and methanol pipeline are prone to block after one week of use. In order to avoid insufficient media supply due to filter blockage, above filters should be cleaned every week, if customers' media is dirty, inspection interval should be reduced to 1-2 days, specific interval depends on cleanliness of the media.

6. Compressed air atomizer

Pneumatic components need to be lubricated during operation. In order to do that, compressed air atomizer is installed at the air supply port (behind the filter). The atomizer lubricates all pneumatic parts with atomized lubricant, thereby achieving lubrication. There is a knob on top of the atomizer. This knob can adjust the amount of atomization of the lubricant. Generally, the knob can be adjusted to the range of 1/4 to 1/3.

Since the lubricating oil is always consumed, refill the cup when the level is lower than 1/2 to ensure that the pneumatic components are well lubricated.

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