How to make a chain How well can you see the movie?

Chains are familiar things that are used in a wide range of applications, such as necklace accessories and swing parts, but I think that few people know how they are actually made. Overseas MediaINSIDERIf you look at the movie that is published, you can better understand the chain manufacturing process.

The process of making chains is surprisingly beautiful - YouTube


In order to make a "chain", it becomes a materialwireUnwind.


After the wire is lubricated in the box, it passes through a die hole thinner than the wire.


Pulling on the rotating drum will make the wire thinner, but the strength will rise.


Next, wire the wire. Pass the wire between the links (wheels) created by the machine ......


Wrap the wire around the mold with arms from both sides ... ...



I will make one link.


At this time, since wires of sufficient length still remain ......


Bend the wire in the vertical direction ......



Wrap the wire around with the lower arm to create two "sideways" and "portrait" links at the same time.



Next, I will look at another machine. I used to make a jack chain to use for decoration etc., but this is making chains to use for transportation etc.


Pull the wire straight ...


In order to cut to the link size, cut it with a steel cutter.



Cut the wire at the cuts, then pass through the links ... ...


Apply a lot of force to the arm to surround the link type axis, and bend the wire to make a link.



Once you have the link you can pinch the end ... ...


Turn the link so that it is portrait ... ...



Set again. This is repeated and chains are made.


After welding and closing the cut of the link, heat the whole chain with a heat coil until it becomes orange.


The temperature at this time is 940 ° C.


By applying extreme temperature change to water, we change the molecular structure of steel and make it stronger.


As it is hard as it is, it will be hard to endurance, so heat up to a lower temperature earlier with another heat coil ... ...


After cooling on water, you can add elasticity to steel and "chain" is complete.