The Winter Olympics are off to a great start!
On February 2, the Beijing Winter Olympic Curling Mixed Doubles Round Robin Tournament began at the Beijing National Aquatics Center "Ice Cube", and the Chinese team defeated the Swiss team 7-6.
Yesterday
The Beijing 2022 Winter Olympic Torch Relay was also officially launched
There are many things to see
For the first time in history!
Two robots complete the Winter Olympic torch relay underwater
Not only has new history been created
It also allows people to empower the Olympic Games with technology
There is more room for imagination
Eye-opening netizens have said
It's so hot!
The technical difficulties of water and fire have been overcome
The "flying" torch is actually woven?
It can also burn in addition to water
Do you know?
The Winter Olympic torch "flying" is "wearing a coat"
And it's carbon fiber clothing
In the production workshop of the cooperative development team Huai'an
A circular "big guy" with a diameter of 8 meters is running at high speed
Hundreds of black tows weave and weave
At first glance it looks like "knitting a sweater"
It only takes a few minutes
You can "make up" one piece
Torch coat accurate to "grams"
What is the black technology behind the little torch?
Professor Sun summarized the three "high" words of "high-tech materials", "high-tech equipment" and "high-end manufacturing".
He said that this is a perfect collision of art design and technological innovation. In August and September 2020, Shanghai Petrochemical, the overall bearer of the torch, found Professor Sun Yize, who has been working in the field of automatic weaving equipment for nearly 20 years, and threw out a difficult problem - how to use carbon fiber composite materials to present the artistic shape of the whimsical torch outer streamer with high precision.
The torch "flying" production scene of the partner Huai'an base
The outer streamer shape of the torch "Flying" is very special, it is a high-dimensional surface body, which is an extremely complex heterosexual structural part for engineering manufacturing.
Professor Sun said that the first thing he saw was a clay sculpture torch work "Flying", which is derived from the artist's inspiration, hand-shaped boutique, to complete digital manufacturing, industrial production, and with high-tech carbon fiber composite materials woven molding, the first difficulty to break through is mathematical modeling, only mathematical modeling can restore and reproduce beautiful art design works with high precision, making automated digital manufacturing possible.
In order to lay a good "foundation", Professor Sun Yize led the team to the north several times, and repeatedly discussed, revised and polished with the torch shape designer team of the Central Academy of Fine Arts and the relevant staff of the Winter Olympic Organizing Committee.
Developed currently in the world's largest
Three-dimensional spherical three-dimensional weaving machine
Professor Sun Yize introduced that the outer streamer of the torch is flexible and beautiful, but because it is variable diameter and curvature, the upper and lower levels are not generally thick, the thickness of the curved surface is not consistent, and the traditional manufacturing process cannot be realized, and the "big guy" in front of him is the "secret weapon" of "weaving" the torch coat.
Exclusively developed by Donghua University and the world's first three-dimensional high-precision spherical three-dimensional knitting machine for large-size heterosexual structural parts, this series of weaving machines can weave large-size structural bearing parts such as large aircraft and high-speed railways, and can also weave precision special-shaped structural parts such as propellers, drones, and flare outer streamers. It has a total of 576 weaving spindles, which can weave a maximum cross-section of 500 * 500 mm, which is currently the world's most powerful and largest three-dimensional spherical three-dimensional knitting machine with the largest weaving size.
According to reports, when the equipment is working, in the circular spherical track, 576 high-speed motion spindles continue to change orbit and cross and shuttle rapidly. "This weaving process can be said to be 'dangerous', each movement spindle has 14 kinds of collision possibilities at every moment," Professor Sun Yize made an analogy, "This is like on the four-lane highway, there are hundreds or even thousands of cars quickly crossing through the traffic, not only high-speed running, but also constantly crossing, inside and outside penetrating lane change, we through intelligent calculation, accurate track change control, in order to avoid the occurrence of 'traffic accidents'." ”
Team members are on site to guide the three-dimensional weaving
In order to make these carbon fiber composite materials "obedient" in the weaving process, and at the same time in industrial production to restore the soft and flowing feeling of the outer streamer, Professor Sun led the team to study the control algorithm, wonderful mechanism, rail change technology, etc., from theoretical derivation to experimental verification to production practice, repeated debugging.
Invented the so-called "eccentric" weaving method, solved the problem of large curvature and variable density weaving; original double robot collaborative clamping mandrel control algorithm to ensure the optimal dynamic performance of large-size special-shaped structural parts weaving under complex stress state; developed a single yarn tension whole process digital control technology to achieve constant tension precision weaving; developed a high-dimensional surface automatic grinding skill operation robot system. Realizing the three-dimensional automatic three-dimensional weaving and automated grinding of the outer streamer belt of the torch, the project technology not only fills the domestic gap, but also takes a leading position in the world.
△ Professor Sun Yize and the team members discussed
In the end, Professor Sun Yize's team made the torch "alive" and truly showed the best "flying" state. "Small torches carry large energy, and we in China have the ability and technology to weave and form high-precision carbon fiber composite materials!" Looking at the picture of the successful passing of the torch on the TV, Professor Sun Yize said excitedly, "We will use scientific and technological innovation to support the backbone of the big country's heavy equipment!" ”
Tomorrow (4th) evening
The much-anticipated opening ceremony of the Winter Olympics is about to take place
The expectations are full
We're ready too!
Source: Oriental Network, Xinhua News Agency, Shanghai News Broadcasting
Part of the text is written: Fu Wenjing
Editor: Wei Yifei
Reviewer: Shao Yang
![To make a scientific and technological coat for the Winter Olympic torch, Donghua developed the world's largest three-dimensional spherical three-dimensional weaving machine[fig]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)