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Are the pins and welding bushes scratched on the conveyor chains?

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Dipali B

Industrial conveyor systems often have to operate in demanding and demanding conditions. If the performance of the conveyor chain is important, it is better to use pins and welding bushes to increase the strength and improve the wear characteristics of the chain. If done correctly, welded pins and bushings can increase the resistance of the conveyor chain by more than 30%.

However, if welding is not carried out with a sufficient standard, or if the material is not suitable for the process, or if welding is added later, you may find a low quality conveyor chain. It is easy to decompose and greatly shortens the life.

If the manufacturer of the industrial chain suggested that it could provide a version of its own welded conveyor chain, some things must first be clarified.

1. Is there an automatic welding procedure?

For demanding conveyor applications, the quality and functionality of welding are important.

The use of an automatic welder means that the control of the welding process, the welding temperature and the use of energy are strictly controlled.

With the automatic welding system, each size and type of conveyor chain has its own preloaded welding parameters, which minimizes the risk of human error and provides consistent and repeatable optimum welding quality.

Highly developed automatic welding technology keeps heat affected areas to a minimum, ensuring a product with a long service life over time.

2. Are the pins and bushes hardened by induction?

The material selection and the type of production process used must be specifically designed for the welding of pins and bushings.

For example, it improves the weld ability of the conveyor chains, the pins of the conveyor chain and the hubs of the conveyor chain, so care must be taken to protect the ends of the pins and bushings from hardening.

For example, if the manufacturer reinforces the pin, it will harden to the end, which will affect weld ability.

Induction hardening, on the other hand, facilitates welding because each end of the pin and the bushing are protected throughout the heat treatment.

3. Are chains welded before or after production?

Another important consideration is the occurrence of pin and bushing welding in the production stage.

As you can see in this example, the manufacturer added the welding process as an additional step after the chain was produced.

Crucially, there is a much greater risk of pinching the pin when the circumference of the pin is welded, leaving the chain and driving the chain.

Another problem facing this manufacturer is that the material is not designed to weld the chains for the first time. As a result, the depth of the weld can be very superficial, which leads to the use of lower quality chains, which greatly shortens the life of the customer.

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