With the rapid development of science and technology, technology is updating every day, so what happened in the field of mechanical manufacturing?This week's industry highlights will give you the following information:

Aviation field

Luoluo ultrafan super engine composite parts pass the test

Rolls Royce technicians tested all key components of its ultrafan engine, including composite components.Ultrafan has achieved unprecedented improvements in weight, noise and fuel consumption, and its fuel efficiency is 25% higher than that of the first Trent engine.

All the composite parts on the engine are manufactured by the most advanced fully automatic production process developed by the excellent technology center of the composite factory of Luoluo company.

Each engine blade is automatically laid with about 500 layers of carbon fiber composite materials by robot, and then after hot pressing treatment, titanium alloy is inlaid in the leading edge of the blade at the air inlet side of the fan, so as to realize the great protection of the blade and prevent the blade from being damaged by foreign objects and birds.If the composite materials used to make the blades and hood are layered and connected to each other, their length can extend from London to Leeds (more than 300 km).

At present, the company is seeking to install ultrafan engines to ensure its long-term business prospects.In a short time, it focuses on solving the Trent 1000 engine problem on the Boeing 787.

3D printing

Harvard new technology: a nozzle 8 materials 50Hz high frequency switching subverts the existing 3D printing technology

3D printing technology has always been a technical bottleneck in the field of multi-material printing, so our usual extrusion 3D printers have only one nozzle, only one material can be printed at the same time.

In order to achieve 3D printing of multiple materials, equipment manufacturers generally choose to increase the number of nozzles to two, printing different materials respectively, such as one material as the final model, another material as the supporting structure, etc.However, if you want to further increase the number of material types, it will become very difficult, because it will be very difficult to increase the nozzle.

Recently, the team of Jennifer A. Lewis from Harvard University reported a new type of micro printing technology, which can quickly switch the sticky material with a single nozzle.

The key of the technology lies in the design of the flow channel structure in the multi-material printing nozzle and the precise and fast switching between different materials.The cleverness of the design lies in the integration of multiple material inlets and material outlets into a single nozzle through a three-dimensional flow structure design, and the precise control of the pressure in each flow channel by using a high-speed solenoid valve so that different materials can be continuously switched and printed at the nozzle outlet, thus realizing the volume level control of a single nozzle over materials.

This technology expands the range of materials for voxel printing, thus developing a series of applications for 3D printing that need to accurately control local material properties.At present, the team has integrated mm3d printing technology to produce origami structure and software robot.

Material manufacturing

China's technical team has made breakthrough in high-end aluminum alloy production equipment

For a long time, high-performance aluminum alloy automobile plate, medium and thick plate and profile have been the weak areas of aluminum processing industry in China.

The heat treatment production of high-performance aluminum alloy sheet involves many process parameters, complex process and difficult development. The relevant core equipment has been controlled by people for a long time, and the key technology has not been independently controlled.

By the end of 2017, the production equipment introduced by China is far from meeting the demand of aluminum alloy plate, strip and profile in high-end manufacturing fields such as automobile and aviation.Therefore, it is necessary to develop air cushion furnace equipment, medium and heavy plate and profile roller hearth furnace technology with independent intellectual property rights.

This year, the advanced rolling technology and heat treatment innovation team of Northeastern University, led by Professor Wang Guodong, Professor Wang Zhaodong and other industry experts, made a breakthrough in the "hematopoiesis" capacity of aluminum production.

At present, the team is in full swing to build air cushion heat treatment demonstration line, medium and thick plate roller hearth furnace heat treatment demonstration line and profile roller hearth furnace heat treatment demonstration line for high-end aluminum alloy production for transportation such as automobile and aviation.By the end of the year, it is expected to complete the design, manufacturing and commissioning of the demonstration line, so as to break the monopoly of foreign countries, realize the breakthrough of domestic equipment, process and production technology of high-end aluminum alloy automobile plate and aviation plate, and realize the self-control of key heat treatment equipment and process technology of high-end aluminum alloy materials.

Process technology

Major breakthrough in welding process!British scientists realize the welding of glass and metal

Traditionally, due to the different thermal properties of glass and metal, it is very difficult to weld different materials such as glass and metal together, but the UK has.

According to a breakthrough new achievement released by the University of Herr watt in the UK, researchers use very short infrared pulse edge bonding technology to weld glass and metal together through a super high speed laser system.