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Chapter 380 Encountered a problem

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    Smashing can solve some problems, such as smashing two pieces of iron into one piece of iron, but smashing can't solve all the problems, for example, it is impossible to meet the demand under the pressure.

    Only welding is possible.

    Welding, in fact, is very simple. The electric welding machine provides a high enough current, and then a continuous and stable arc is generated between the electrode and the metal to be welded. This arc is quite strong enough to melt the local metal, and then  Bonded together, at the same time, the electrode is added to the weld as a filler metal and becomes the main component of the weld metal.

    The welding rod is composed of two parts, the welding core and the coating.  The internal welding core is a metal wire with excellent quality, which needs to be of good quality, while the welding skin on the outside of the electrode is a special material.

    If there is no special coating, it is not impossible to use only a piece of metal as a welding rod. However, during the welding process, oxygen and nitrogen in the air will invade the molten metal in large quantities, which will interact with various elements in the metal.  , Form various oxides and nitrides, and remain in the weld, which will cause slag or cracks in the weld.  At the same time, gas will also enter the inside, causing a large number of pores in the weld, and such welding is unusable.

    After long-term practice, technicians have discovered that this way of applying some mineral raw materials on the outside of the welding core can greatly improve the performance of the welding rod, thus making electric welding the most commonly used metal processing method.

    Up to now, electric welding has also developed into an important knowledge. Different welding parts use different welding rods. These are quite technically challenging.

    The Eighth Route Army, in fact, did not have welding technology at all in the past. The Eighth Route Army used all local methods. They didn¡¯t even have electricity, let alone electric welding. Now, with Qin Baoshan bringing a large amount of equipment from Taiyuan City, electric welding  That's it.

    At the beginning, I robbed a lot of equipment in Taiyuan City, including welding electrodes. After using it for a period of time, it has almost been exhausted. What should I do next?

    Qin Baoshan has now proposed that the manufacture of this kind of grenade requires a lot of welding technology.

    Liu Daquan, as the specific technical person in charge, is very clear about these, and the original method cannot be used, but the welding method must be used.

    "I don't believe it anymore. As long as you use your brain, there is nothing you can't do." Wang Dashan said, "Isn't it just to make a hole? What's the difference from making a gun barrel? Simply, let's smash the iron into a large piece, and then we will chisel it."  A hole, and then expand the hole, wouldn¡¯t it become a cannon barrel? In this way, you don¡¯t have to worry about the strength, right?¡±

    First build a whole piece of steel, and then dig a hole from the middle. This method should be the most common method, but now, after hearing his words, Liu Daquan also smiled wryly: "Our gun barrel is only 6.5mm.  The caliber is 50 mm, and it will come out after digging, but now, what we are going to build is a small 50mm cannon, with a caliber of 50 mm, which is ** times the original, you try to expand the hole?"

    There is a limit to drilling a hole first, and then enlarging the hole. Now, if you want to expand it into a 50mm hole, the difficulty is not ordinary.

    Fortunately, now, everyone is used to speaking in technical terms. In the past, they would not be able to tell how many millimeters they have, without these concepts.

    "The lack of welding rods is a trivial matter." When the big guys were discussing, Qin Baoshan said: "Don't worry about this matter, you just use it. If it is not enough, it is not your responsibility."

    Hearing this, the big guy was overjoyed immediately. With Factory Manager Qin here, we really don't have to worry about welding rods at all.

    Everyone eats the radish first and doesn't worry about it. You shouldn't take care of it yourself, so you don't have to ask about it yourself.

    "If there are enough welding electrodes, then we can start work at any time. In the past few days, we will make a sample according to this drawing and experiment." Liu Daquan said.

    "Actually, the most important thing about this grenade is the ammunition." Qin Baoshan said, "This is also the most important problem we need to solve at present."

    The shells placed inside the grenade are not simple. They need to be fired reliably, with booster propellants behind them and explosives in front. Although they are small, their structure is much more complicated than that of grenades.

    In the past, everyone had never made cannonballs, and this was the first attempt. After all, in addition to being able to make guns, you must also be able to make cannons. In the later period, the grenade launchers of the Eighth Route Army could even reach the level of infantry squads.  The firepower used to destroy the enemy is quite efficient. After the War of Resistance Against Japan, the Eighth Route Army has also continued to grow and develop.

    Qin Baoshan doesn't have any system as a backer, he can only rely on himself.

      "The cannonball is not difficult. Although the structure is complicated, we can make the cannonball as long as we follow suit." Liu Daquan said: "It's a big deal, let's take apart a cannonball and study it."

    "No need, I have the design drawings here." Qin Baoshan said, and took out his own design drawings, which surprised everyone. Qin Baoshan actually disassembled the shells privately, and then surveyed and mapped them for imitation?

    Such a dangerous thing, why don't you ask the big guys to do it together!

    "It is similar to the grenade used in the mountain cannon, but it is definitely not scaled down. Although the sparrow is small and has all the internal organs, it is very special. If it is specific, it can be roughly divided into three structures, the main charging chamber and the firing chamber.  and fuze." Qin Baoshan introduced to everyone again.

    If one's own side can produce it, it means that even if the troops capture the grenades, they can continue to use them, and will not wait until they run out of shells to throw them away.

    The big guy looked at the drawings, and the above markings are very detailed. Take the main charge chamber as an example, it is divided into three parts. The upper projectile shell is an inverted arc-shaped flat-bottomed hollow bowl, and the top is thicker, because the fuze needs to be installed.  , so it has a 20mm left-handed threaded hole, and a right-handed external thread for connecting with the center projectile.  The shell of the projectile body is a straight cylindrical shape with smooth inside and outside, and internal threads are processed at both ends.  The lower projectile shell is a stepped thick cylinder, the upper part has an external thread connected with the intermediate projectile; the middle part has a cylindrical positioning section, and the lower part has a longer external thread to connect the propellant chamber seat.

    "Our existing processing technology can do it. This thing is much more complicated than our grenade." Liu Daquan saw that the main charging room was so complicated, and couldn't help but said: "It needs to be processed on a lathe."

    These threads are too complicated, but for our side, it is not difficult, just a few knives on the lathe.

    "What if white pig iron is used?" Qin Baoshan asked.

    "White pig iron? That's impossible!" Liu Daquan said, "It's too brittle to be machined on a lathe."

    "If we want to manufacture a large number of shells, it is impossible to use rail steel extravagantly. Our biggest challenge now is to make this impossible possible." Qin Baoshan said: "We just want to make white steel on our lathe.  I know it's difficult, but we can only do this. The precious track steel can't be wasted on this. Our family is poor and we have to be able to live. I patted my breasts on the brigade commander.  "(Remember this site URL: www.hlnovel.com
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