Ye Ran's curiosity is by no means suitable for going to a factory to be a worker.

Because it is easy to get injured at work.

Just like last month, there were new workers in the motor factory who were curious, and I heard the master say that the resin glue used to package the motor motherboard was particularly hot, so don't touch it with your hands.

Then the worker thought to himself, no matter how hot it was, how hot it would be, wasn't it just to heat the resin glue into a liquid?

I reached out and touched it lightly before retracting it.

As a result, I was curious, and a large piece of resin glue stuck to my fingers, and I couldn't shake it off, so I went directly to the hospital.

Fortunately, Ye Ran knew that this kind of motor was just a simple high-frequency vibration, which was very harmful to solids, but would not have any ability to harm soft skin.

However, the surface of the motor is very hot.

The 12V operating voltage is the maximum voltage that the motor can withstand. But at this voltage, the motor casing will be very hot and will only work for two minutes before burning out unless it is equipped with a cooling system.

The vibration lasted for nearly three minutes, and then the motor clicked and emitted a puff of white smoke, and then there was no movement.

The technicians on the side were not distressed at all, and soon replaced it with a new magnetic levitation linear motor for testing.

Later, it is necessary to test the working state of the motor in the case of voltage fluctuation or voltage drop.

Ye Ran did not continue to watch the later test, but came to the production workshop with Song Yu and the factory manager Lu Chengyu.

In order to be able to mass-produce magnetic levitation linear motors, the motor factory not only set aside an area dedicated to the production of this motor, but also ordered a number of equipment that can be used to produce this motor.

However, these devices are either used to produce magnetic levitation motors or linear motors, and in order to combine them into one, the equipment must be adjusted and improved.

After a period of research, technicians can now produce magnetic levitation linear motors in small batches, but there is still a distance from large-scale mass production.

In the production workshop, Lu Chengyu, the factory director, introduced the current technological progress to Ye Ran and the technical difficulties encountered.

Ye Ran provides a full set of technical information on magnetic levitation linear motors, which details the winding method of each independent acceleration coil inside the motor, the allowable accuracy error range of the winding, the separation distance between the mover and the guide rail, the magnetic range of the mover, and the C processing drawings of the bearing and the shell, etc.

Even the magnetic field division of the acceleration coil during operation, as well as the air cushion and magnetic cushion effects generated when the mover is doing work, are described in detail.

But in the field of industrial manufacturing, there is another situation:

Give you the blueprints, and you won't be able to make them.

It turns out that many "shepherds" like to use it as a mantra to ridicule the local manufacturing industry.

But now the situation encountered by the motor factory is similar to this.

After this period of technical research, they have been able to use C CNC machining centers, and manual assembly, to produce this motor in small quantities.

However, on the side of mass production, only high-speed winding, mover processing, and shell processing technology have been solved.

The mass production and processing of grating sensors, as well as the very important magnetic bearing bearing, have not yet been solved.

The three of them walked to a high-speed winding machine, and the factory director Lu Chengyu introduced that this winding equipment was specially made for technical improvement after they purchased linear motor winding equipment.

Now they have a total of six dedicated high-speed winding machines, and in order to maximize the speed, the headquarters technicians have also specially developed an assembly line winding method.

Now that the winding machine has not been turned on, the factory director Lu Chengyu showed Ye Ran the start-up winding video taken before.

In the video, the teeth and claws of the six high-speed winding machines, each of which is two meters high, are cabinet structures below, and above are silver-white slender winding robotic arms that look like octopuses and spider legs.

These winding robotic arms are only the thickness of a tachyon, which is very slender, and they are also wound with extremely thin copper wires and transparent pipes.

As it began to work, six winders lined up in a row, and a three-centimeter-wide white Teflon-coated track between them began to move, slowly transporting a self-adhesive coil tape to it.

Then six winding robotic arms around the high-speed winding machine began to "draw one neatly".

At a speed invisible to the naked eye, they spray copper wires over the coil tape, which are pulled by another elongated robotic arm that moves at high speed, and attaches them firmly to the tape in a specific oval structure.

It's a bit like a spider weaving a web.

The video footage began to zoom in, and the accelerator coil, which was originally only a small dot, was magnified to the entire screen.

I saw that after the winding robotic arm spared a layer of copper wire on the tape, another robotic arm joined in and quickly sprayed a layer of yellow special glue on the first layer of copper wire.

As soon as the glue is sprayed, the winding machine starts the winding process again, and quickly wraps another layer of coil on the glue.

Then came the second layer, the third layer......

There are a total of 16 layers of accelerator coils.

Six high-speed winding machines are wound together on the tape, and when an accelerator coil is wound, the Teflon-coated track immediately moves a few millimeters to allow the winding robot arm to continue winding in the empty space next to the coil.

"The Legend of the Fairy Tree"

Lu Chengyu, the director of the factory, said that once the six winding machines start to work, they will keep winding on the tape.

This way it can be wound out a long, endless, tape covered with accelerator coils. When needed, the tape can be cut directly and then attached to the upper and lower shells of the motor.

Because they are fully automatic winding machines, they can wind up to 50,000 sets of coils required for magnetic levitation linear motors a day without failure.

Next is the shell processing process.

The motor shell is made of aluminum-manganese alloy material, which is also used by many lithium battery manufacturers to charge as an aluminum battery to protect the shell.

It has a series of advantages of aluminum alloy, but also has higher heat resistance, higher ductility, and oxidation resistance than aluminum alloy.

It does not break as easily as aluminum alloys, and even if it encounters external forces, it will only deform like steel.

Of course, the motor shell is C processing technology, and the motor factory orders special thickness of aluminum-manganese alloy plates from the metal processing factory, and then cuts the aluminum-manganese alloy plates into a specific size.

The machining center can process the upper and lower housings of the motor on these specific size sheets.

Theoretically, as long as it is a CNC machining center, this kind of shell can be processed.

But it's too inefficient.

Because the machining center needs to change different tools when doing different machining processes, and the spindle moves back and forth at the same time, which is extremely delayed.

In order to achieve the goal of mass production, the motor factory takes out the time-consuming processing processes in the motor housing processing process separately and processes them with special equipment.

Such as grooving.

The size of the motor is 1.8 centimeters thick, and the thickness of the housing is 1.5 millimeters.

Therefore, a 7.5 mm deep groove was needed in the sheet to accommodate the magnetic rails and movers.

If it is a C machining center to make a groove, it has to change the tool, and then move back and forth, using the milling cutter to cut the groove little by little.

It's a waste of time.

Now the groove is made with a special equipment, and a 7.4 mm deep groove is milled directly with a 21 mm diameter milling cutter.

It has only one function, which is to mill the slot, and nothing else can be done.

The machining center takes 10 minutes to process, so it only takes 10 seconds.

The milling cutter will reserve 0.1 mm of machining allowance for finishing on the machining center.

This is true for groove milling, but also for housing machining.

The cutting equipment is very accurate when cutting the plates, and it is also time-consuming to use a C machining center to finish the shell.

The factory has prepared a high-precision automatic milling equipment that uses the equipment to mill the required accuracy directly after the sheet metal is cut.

A few meters long plates, milled with a knife, done.

The rest of the drilling, finishing of the internal fixing slots, is left to the C machining center.

The shell is machined like this, and so are the internal movers.

But the remaining magnetic bearing processing, and grating sensors, the motor factory is a little blind.