How are the rail cars that are often seen in daily life made?

We often see rail cars running like trains. How are the railcars that we often see in our daily life made?

First, the computer-guided plasma cutting machine cuts out one part after another on the steel plate with a thickness of 10 cm, and then the master welds these parts together. They first turned the deck upside down and welded it to the frame longitudinal beam, and then welded the rail wall bracket to the frame longitudinal beam. This is a processing factory specializing in manufacturing rail cars. Next, the master fixed the axle with bolts, so as to install rubber tires on the longitudinal beam of the frame later.

Second, then, they installed the guide rail wall on the guide rail bracket, and then painted the frame with a yellow sprayer. After the paint is solidified, the master will install the track wheel with the diameter of 137 cm on the track wall, and then install the bearing and the big nut. The captain must tighten the nut to the specified torque, but not too tight to prevent the wheel from turning freely. Later, he installed a hub cover on the track wheel, which can be filled with grease to lubricate the wheel and bearing, while preventing dust and dirt from entering.

Thirdly, in the next step, the master installed four rubber wheels with a diameter of two meters on the rail car. Similarly, the rail car can run normally on the ground and then be equipped with a pair of gas tanks with instruments. He will provide the pneumatic braking system of the rail car. Then, the master connects the hydraulic cylinder to the steering shaft to control the steering of the rubber tire.

Fourthly, the master installed a 300-horsepower diesel engine for the rail car and connected it to the transmission, so that the computer can control the power of the whole rail car. Then, they installed a hood above the transmission, and the hood has integrated a muffler and an intake filter. Finally, the masters installed a console that can rotate freely 180 degrees. Thus, a rail car weighing 45 tons and capable of pulling 40 trucks at a time was completed.