Yan value is combat effectiveness
As the saying goes, Yan value is combat effectiveness. The combat capability of a first-class weapon can be seen from the appearance of the weapon to a great extent. Modern warships, as the main weapons in maritime operations, have become one of the favorite equipment for many military fans with their simple and streamlined shapes.
However, when you get close to the warship, you will find that "many warships can only look at it from a distance ..."
Junwujun once visited the No.525 Maanshan frigate at close range. When you get close to this warship, you will find that the hull of this warship is not very smooth, and it seems to have a large grid-like scraggy, even revealing the shape of the reinforcing ribs under the steel plate, like the wrinkles of orange peel. What's going on here?
52C
To solve this question, we should start with what materials warships are made of and how they are made. Speaking of the manufacture of warships, we have to mention armored ships. In the second half of the 19th century, wooden warships were unable to resist the increasingly powerful artillery bombardment, so they had to put a layer of iron protective clothing on their hulls. The most famous thing is that the French navy wrapped a thick layer of armor on the outer layer of wooden ships to resist the attack of sea artillery, and named it "Glory". I didn't expect this sudden idea to lay the embryonic form of modern warships.
"Glory" armored ship
The "Glory" wrapped in iron was invincible at that time. Its manufacturing method is to use solid wooden boards to form a hull, and then rivet a piece of iron sheet stuck outside with iron rivets. Riveting iron sheet uses hot riveting method. That is, the two iron sheets to be connected are drilled with holes respectively, then the rivets are burned red, and after passing through the holes in the steel plates, the rivets are hit with a die to quickly form the rivet head. When the rivets are cooled down, the two steel plates will be automatically connected more closely by using the principle of thermal expansion and cold contraction.
Armored armor of armored ships
Unlike current warships, armored ships at that time used reinforced ribs as the skeleton and then welded steel plates. At that time, the armored ship was lined with integral wooden materials, so it looked full as a whole, with external rivets arranged neatly and orderly, and the iron sheet on the outside was very flat, and there would be no orange peel phenomenon. Later, with the development of industrial technology, the technology of building warships is also advancing by leaps and bounds. The original technology of building a ship before dressing is very troublesome. Moreover, the wooden materials wrapped in iron sheets are easy to corrode, have a short life and are not strong. Because of the rise and maturity of welding technology, steel plates are simply used to weld warships.