There are many directions of industrial lithium batteries, such as polymer lithium batteries, energy storage lithium batteries, lithium ion batteries, lithium iron phosphate batteries, etc.

For example, the West BAN Ya Graphenano company claims to have developed a graphene polymer battery with a specific energy of 497Wh/kg, which is twice the ternary lithium battery of Xinghai Group;

There are other types of batteries with very high energy density, but it is difficult to achieve mass production.

However, the above are all ordinary batteries, and for Muyang, there is no black technology.

But it is also the direction that Muyang will develop in the next two or three years. High-energy-density batteries can be applied to flying equipment, such as flying cars or drones.

At present, there are already institutions researching nuclear energy batteries, but they are still in the experimental stage.

Now Muyang doesn't want to touch the nuclear energy battery, and it is estimated that the research will be difficult to achieve. We will look at it after the system is level 7.

The company's ternary lithium battery can still be deeply researched, but Muyang wants to pause and let the battery project team digest the ternary lithium battery technology he bought first.

Therefore, battery research has come to an end.

The technical direction that Muyang is going to study has already been decided in his mind, that is, additive technology, commonly known as 3D printing, rapid prototyping, and physical free manufacturing.

This is a fusion of computer-aided design, material processing and molding technology, based on digital model files, through software and numerical control system, special metal materials, non-metal materials and medical biological materials, according to extrusion, sintering, melting, light curing. , spraying and other methods are stacked layer by layer to create a manufacturing technology for physical objects.

Compared with the traditional processing mode of raw material removal-cutting and assembly, it is a "bottom-up" manufacturing method through material accumulation, starting from scratch.

What is "top-up"?

This is the same as building a house, you can only start from the bottom and build it up layer by layer.

This additive technology has been applied for a long time, such as the addition of cold-processed materials such as gypsum statues and polymer materials.

But the most difficult thing is to add metal materials!

Because the metal must be melted, the temperature is very high, and the fusion temperature of different materials is different. In the next few years, the most used material will be titanium alloy additives.

This 3D printing technology is mainly used in the manufacture of complex materials, which cannot be done by conventional processing methods, and this 3D printing is produced.

For example, to design a hollow metal ball, can it be made by machining?

no!

The equipment cannot be constructed because it will eventually need to be sealed.

Machining is a kind of "subtraction", that is, the material removal processing technology, and the material is cut off with a tool.

This is a bit like eating a watermelon. Without cutting the watermelon, is there a way to take out the flesh inside? Only one watermelon rind left?

The general method is to drill a small hole and **** out the watermelon flesh.

But how does metal suck?

Can't breathe!

It's not magic.

Also, drill a hole and it's not a whole.

If the manufacturing method is used, it is to machine the two hollow hemispheres first, and then use the welding method to weld them together.

This is the most common processing method, but what problems does it cause?

For example, the welding interior is not smooth, defects are prone to occur, the welding will be deformed, the welding cost is high, and the welding internal stress and so on.

There are also casting, friction welding, etc., which cannot achieve internal defect-free.

Conventional manufacturing methods cannot perfectly produce a hollow metal sphere.

However, if metal additive technology is used, it can be achieved.

It's like building a house, adding material little by little to "fill" it up.

Compared with the traditional material-removing processing method, it belongs to "additive material". The weight of the hollow sphere depends on how much material it needs. There is no residual material, and the material utilization rate reaches 100%.

But it has three biggest problems.

The first is the low efficiency of the additive material and the long working time;

The second is the problem of layer thickness, which is currently developing to 0.01mm. If the layer thickness is excessive, the accuracy and surface roughness will be very poor;

The third is poor plasticity and toughness. For example, if it is used to machine shafts, it will not work!

It can be processed, but the toughness of the processed shaft is poor and it is easy to break!

So, important shafts are forged, not cast!

3D printing is actually a form of casting. It just means that conventional casting is pouring, and the molten material is poured directly into the model, while 3D metal printing requires a relatively small amount.

Mu Yang felt that he couldn't solve this shortage problem, so he never wanted to study this technology, but he knew that it would definitely be used in the future, and it really wouldn't work without it!

For lightweighting, one of the key advantages of additive manufacturing can be exploited: the ability to produce complex parts.

For example, flying cars can be solved not only from material selection, but also from complex structural design, which cannot be solved from conventional manufacturing methods.

On the other hand, the assembly of final parts or subassemblies is a regular part of the manufacturing process, requiring additional time, equipment, labor and quality control, and can create problems at the point of assembly. Assembly points add extra weight through fasteners, resulting in increased operating costs in fuel-consuming applications.

Assembly points are also common points of failure, which can lead to undesirable risks or downtime if the connection point is weakened. For these reasons, finding innovative and effective ways to eliminate or reduce assemblies can benefit many areas.

One of the branches of complex parts that additive manufacturing excels at are integrated assemblies and one-piece designs. Additive manufacturing allows parts to be connected at the design stage and seamlessly integrated in production.

This means less fasteners are required and a reduction in the total number of parts produced, with a corresponding reduction in overall weight.

Mu Yang turned on the reading system.

Reading System

[Level 6: 42.3Y/100Y] (current experience/upgrade experience)

No experience added: 122250.5W

Amount that can be withdrawn: 915220000 yuan

Muyang

22 years old

Advanced Mathematics: Level 7 (2Y/20Y)+

Discrete Math: Level 6 (8000W/2Y)+

Mathematical Analysis: Level 7 (2Y/20Y)+

Complex variable function: 6 levels (6000W/2Y) +

Analytical Geometry: Level 7 (2.2Y/20Y)+

Topology: Class 7 (3.2Y/20Y)+

Mu Yang's attainments in mathematics are extremely high, followed by his knowledge in manufacturing.

The amount that can be withdrawn is still more than 900 million, and Muyang withdraws it from time to time and enters the overseas account.

The system said that his concerns could be resolved through some special means, and that was definitely no problem.

There is still 1.2 billion experience, which seems to be a lot, but it is not much. If you need to spend it, it will be used up in a while. You can only upgrade 6 level 7 subjects, or use it to solve a few mathematical conjectures.

It will take at least a year and a half to upgrade the reading system to level 7.

Start with basic additive technology first to lay a solid foundation for the future.

Xinghai Group is good at the fields of plasma welding and laser welding technology, and further research on additive technology is a higher level technology in this field.

The additive technology he wants to study is to use laser beams, electron beams, plasma or ion beams as heat sources to heat materials to combine them and directly manufacture parts, which is called high-energy beam rapid manufacturing and is an important branch in the field of additive manufacturing. Most common in industry.

In the field of additive manufacturing technology in the aerospace industry, high-energy beam rapid manufacturing of metal, non-metal or metal matrix composite materials is the fastest growing research direction.

Aerospace is the fastest growing metal additive application area, precisely because of the ease with which it characterizes manufacturing.

At present, the market size of metal additive technology is about 1 billion US dollars, which seems to be small, mainly because of low efficiency and precision problems.

If Muyang can solve these two problems, if the price correlation is not large, the market size will increase more than tenfold.

Muyang searched for metal additive related technologies in the achievement point store, and in an instant, he saw dozens of metal additive related technologies.

Look at the technical introduction one by one,

An hour later, find a suitable technology developed by Xinghai Group.

A new metal additive laser additive manufacturing technology LDM01

[Technical introduction: LDM () technology is an organic combination of rapid prototyping technology and laser cladding technology. It uses metal powder as raw material, high-energy laser beam as heat source, and a scanning path planned according to the layered slice information of the CAD model of the formed part. The supplied metal powder is melted layer by layer, rapidly solidified, and deposited layer by layer, so as to realize the direct manufacture of the entire metal part.

It has the following advantages: the forming size is not limited, which can realize the manufacture of large-sized parts; the parts have no macrosegregation, the structure is fine and dense, and the mechanical properties reach the level of forgings; Near net shape]

[LDM01, the world's top level, leading the current laboratory's most advanced technology for about 4-8 years, demand achievement points: 100]

Disciplinary requirements: Programming C++: Level 6, Programming C language: Level 6, Manufacturing Operating System: Level 7

After figuring this out, Mu Yang decided to buy this technology.

One hundred achievement points really hurts. Judging from the current market situation, it is impossible to make a lot of money on it, which is why he has never dared to buy it.

But this additive technology can solve Muyang's problem, so it has to be done.

Upgrade subjects that have not yet met the requirements, then confirm your purchase!

absorb!

In an instant, his brain was warm, and there were many principles, device structures, and functions about the LDM technology... which were integrated into his memory sea, which lasted for nearly ten minutes!

After the end, Mu Yang found that he had a better understanding of laser and optical path system, water cooler and cooling system, CNC machine tool system, powder feeder and powder feeding system, inert gas protection system, laser melting deposition cavity and process monitoring system.

There are not many equipments, the key equipments are lasers and CNC machine tools!

After absorbing the knowledge, Mu Yang discovered that with the technology of Xinghai Group, it is really impossible to manufacture CNC machine tools that meet this LDM01 technology.

Xinghai Group has no experience and technology in manufacturing CNC machine tools.

Is it possible to buy it?

no!

This is because Xinghai Group cannot buy high-precision CNC machine tools!

Even if you buy key components, it is difficult to transplant the CNC machine tools required by Muyang, and you must develop them yourself or cooperate with machine tool manufacturers.

The additive accuracy of LDM01 technology should reach below 0.01mm, so its motion trajectory is required to be very strict, that is, the machining accuracy of CNC machine tools is required accordingly.

There are many factors that affect the machining accuracy (size, shape and position accuracy) the most, such as machine tool error, machining principle error, residual stress inside the workpiece, manufacturing error and wear of fixtures and tools, process system, etc.

The most difficult to solve, the machine tool error is one of them, which is manifested as repeated positioning accuracy.

It's too troublesome to work on a machine tool, so is it possible to use a robot to replace the trajectory of a CNC machine tool?

If it is a general additive technology requirement, the precision requirement is not high, and the robot can of course solve it.

The repeated positioning accuracy of the robot is about plus or minus 0.05mm (5 wires), and some can reach plus or minus 0.02mm. The current robot control on the market cannot meet the requirements of LDM01.

Similarly, depending on the level of a machine tool, it depends on its repeated positioning accuracy! (The screw has a return gap, and the repeated movement back and forth will cause errors)

If the repeated positioning accuracy of a machine tool can reach 0.005mm, it is a high-precision machine tool;

Below 0.005mm, it is an ultrhigh-precision machine tool, and a high-precision machine tool must have the best bearings and lead screws.

The dimensional accuracy and shape and position accuracy of typical parts processed by the machining center are compared with the domestic and foreign levels. The domestic level is roughly 0.008-0.010mm, while the international advanced level (the beautiful country of Ruide Island) is 0.002-0.003mm.

In fact, in this era, it is very good for my country's machining centers to reach 0.05mm, which can be regarded as CNC machine tools with high machining accuracy.

The general processing requirements are not that high at all, and it can basically meet the requirements if it can reach 0.05mm.

Of course, if you want to develop an industrial master machine (ultrprecision CNC machine tool), the higher the precision, the better.

If Xinghai Group can solve the problem of repeated positioning accuracy of 0.005mm, it can also meet the requirements of the additive equipment he purchased, and at the same time, it has almost the foundation for manufacturing industrial mother machines.

It's almost the same, if you want to win over international competitors,

It does not mean that the industrial master machine can be built by solving the repeated positioning accuracy, but only that the conditions are met. To develop an industrial master machine, there are too many technologies that need to be solved, such as materials, high temperature wear resistance technology, stress relief technology and so on.

The CNC machine tool is controlled in the form of digital signals. Each time the CNC device outputs a pulse signal, the moving parts of the machine tool move a pulse equivalent, generally 0.001mm.

After all, in addition to pulse motors (also known as stepper motors), mechanical mechanisms such as bearings and screw rods also meet the requirements.

"Wow, in order to develop additive manufacturing technology, we must first solve the problem of CNC machine tools;

To solve the problem of CNC machine tools, we must first deal with the problems of pulse motors, bearings and screw rods! "

Muyang sorts out his thoughts. If the technical problems of pulse motors, bearings and screw rods are solved~www.mtlnovel.com~, it will almost reach the level of CNC machine tools of industrial mother machines.

In the future, industrial mother machines are also part of Muyang's dream plan.

Therefore, the development of pulse motors, bearings and screw rods is not a fool's errand, but laying the foundation for the industrial mother machine.

Next, Muyang spent 60 achievement points to purchase the manufacturing technology of pulse motors, bearings and screw rods, and another 100 achievement points to purchase the technology of CNC machine tools.

This time, I spent another 160 achievement points, and today I spent a total of 260 achievement points!

It hurts!

The total achievement points are only 606.5 points, and it may take a lot to solve the problem of CNC machine tools.

For less critical technical issues, Mu Yang intends to solve them by himself.

With the world's first technology pulse motor, bearing and screw, as well as the world's first technology CNC machine tools, it is impossible to build the world's first level CNC machine tools within one year.

The world's first-level CNC machine tools have met the requirements of industrial mother machines.

However, with technology alone, there are many basic technologies that cannot meet the requirements and cannot be created.

However, it is no problem to get a world-class CNC machine tool.

It's not that manufacturing an industrial mother machine is more complicated than making a car, and the number of auto parts can be more than that of an ordinary CNC machine tool!

However, every technical requirement of the industrial mother machine is very demanding, involving too many technologies that Xinghai Group does not have, which is too time-consuming and energy-consuming.

But Muyang doesn't want to spend too much time on CNC machine tools for the time being. In the next year or two, world-class CNC machine tools will already meet the requirements of Xinghai Group.

If Muyang spent 100 achievement points on metal additive technology a year ago, it would have been a waste of achievement.

He also did not expect that engaging in metal additive technology would be so tossing.