From now on, NORINCO Group has begun to enter the R&D and production stage. Various parts will be manufactured. Workers will improve their skills in the process, and these parts themselves will also have value.
For example, the crankshaft that Liu Lang drew just now costs more than 4,000 yuan from the German Andrews Company, which is quite expensive. There are also matching tools, and the price of a set is also as high as more than 1,000 yuan.
The crankshaft is better. It is a durable product. As long as you don’t dismantle it and smash it hard, it will not be damaged frequently. The tool is different. No matter how good the tool is, it cannot exceed its endurance range. Under domestic production conditions, the tool often breaks
In a state of full load operation, the service life of the tool will be reduced in this state.
Sharply shortened, the tool that could have been used for a year is likely to show wear in less than a month, which will affect the processing of parts. It will have to be repurchased in less than two months. It is not because German products are not good. Under the same conditions
If it were replaced with a domestic product, I'm afraid the blade would break if I cut it.
Calculated in this way, one machine tool costs 5,000 to 6,000 yuan per year just for cutting tools, and ten machine tools cost 50,000 to 60,000 yuan.
There are now nearly a hundred companies across the country that purchase Andrews machine tools, with more than a thousand machine tools. The original cutting tools alone cost 5 to 6 million per year. This does not include those who cannot afford Andrews machine tools and only purchase cutting tools.
Those small factories purchase far more quantities than the entire set. Calculated in this way, the purchase volume of knives alone exceeds 20 million yuan a year, and this amount increases by 23% every year.
The market is growing at a rate of 10, and will basically double in about three years. It is really a huge market.
If Norinco manufactures cutting tools of the same quality, the price will definitely be much lower than that of Andrews Company, and the labor cost will be more than ten times lower than that of the other company. In fact, Norinco already has the corresponding capabilities, and the only difference is the workers.
ability.
Crankshafts and cutting tools will be the main focus of Norinco in the next year. Once these two parts are mass-produced, they can enter the market immediately. This is the real brand of Norinco. Of course, this is just a transition. Norinco
The purpose of the group is to manufacture machine tools, and workers can strengthen their skills again through learning.
"Okay, I have told you so much about turning technology. I think you should also know the next step of our Norinco's plan. I plan to manufacture the kind of crankshaft I just drew within a year, and
There are more than a dozen kinds of knives, let’s take a look!”
Liu Lang picked up the chalk again and started drawing on the blackboard one by one.
Drawing different shapes with both hands at the same time is Liu Lang's unique skill. There is no other person in the world who can do it. However, the workers have long been accustomed to it and think it is nothing special. However, they have tried it themselves, and no one can do it.
Imitation, fortunately there are no anthropologists here. If I saw Liu Lang's multi-purpose brain, I would probably have to scream and dissect this "monster" into slices.
In just ten minutes, Liu Lang drew thirteen tool graphics, and the parameters were clearly written.
"Oh, boy, these knives are so exquisite that they are unparalleled!"
The workers couldn't help but sigh in admiration. In their eyes, this is a work of art, and they would be reluctant to use it if it were made.
Liu Lang doesn't just paint, what he wants to do is explain the knowledge contained in it to everyone.
"When manufacturing a tool, we must first consider its geometric shape, because the geometric characteristics directly affect the cutting force: First, appropriate concentricity is conducive to the even distribution of load on the cutting edge: Larger cutting edge overlap is conducive to obtaining uniform cutting force.
Characteristics; short cutting length is conducive to obtaining better rigidity; the core cross-section is in the best condition and the stress concentration at the notch is minimal.
The geometry of these tools I drew has reached perfection, and the increased load on the cutting edge requires a stable design of the cutting edge geometry.
However, under high-speed cutting conditions, more frictional heat will be generated in the free area of the workpiece surface, which means that the clearance angle of the tool must be reduced. Therefore, increasing the stability of the cutting edge can only be achieved by reducing the bevel angle.
.
When the material is very hard and the tool material is very brittle, it may even lead to a negative bevel angle... I will explain each of them to you in detail in the future.
Secondly, there are materials and coatings. The tool material must be harder than the material to be processed. The greater the hardness difference between the workpiece material and the tool material, the smaller the tool wear and the longer the tool service life. Because the local temperature is very high, it must also be ensured
Tool materials are resistant to oxidation.
Large heat load fluctuations and requirements for the oxidation resistance of tool materials ultimately require coating on fine-grained tungsten carbide tool bodies. There is only one smelting furnace in my country that can smelt this material. Of course, I will contact other manufacturers. Let them smelt.
There is another detail that is easy to overlook but plays an important role in turning, and that is the requirements for the tool holder.
We at NORINCO manufacture high-end machine tools, so high spindle speed is required during processing. This has very high requirements on the tool holder system. Since the tool holder flange is installed on the spindle head, the tool holder is on the z
There is clear mechanical support in the direction, so at higher speeds, the spindle will not be dragged in due to the increase in centrifugal force. This requires a very high balance. If the balance is not good or the rotating tool system is not concentric, it will lead to a poor surface.
Quality, very low tool life, poor machining stability and safety can also damage the milling spindle
Unbalance is equivalent to having an eccentric object rotating. This eccentric object can induce centrifugal force, which increases squarely with the increase of rotational speed. This means that the same imbalance will induce centrifugal force on a spindle rotating at 42,000 rpm.
It is 441 times that of a 2,000 rpm spindle (212 = 441). Therefore, the imbalance of the tool holder device in high-speed machining has particularly obvious adverse consequences."
Therefore, the balance quality has an important impact on the dynamic performance of the entire rotating system..."
Liu Lang was talking about it, and everyone was remembering it seriously. Everyone is like a sponge in water, absorbing knowledge crazily. Maybe they don't feel it, but in fact, these people improve very quickly.
Nationwide, they are among the best manufacturing workers.
Norinco has started a new round of study and work. At the same time, it has also led a group of followers. Enterprises have begun to gather around Norinco. Liu Lang often gives them pointers to help them adapt quickly.
According to the rhythm of Norinco, this time they are serious about it. Maybe in another year an upstream and downstream industrial chain will be initially formed.