3D Printer
Open the "Product Center" menu on the official website of the National Additive Manufacturing Innovation Center, a set of white background with blue edges, with a display, controller of electronic equipment into view: metal fusion wire additive and subtractive material integrated manufacturing equipment, metal laser melting printer, desktop DLP light-curing molding equipment ... ...These self-developed 3D printing equipment, some have been put into production, printing out plastic or metal parts.
Lu Bingheng, academician of the Chinese Academy of Engineering and professor of Xi'an Jiaotong University, is the head of the National Additive Manufacturing Innovation Center. He leads hundreds of researchers in research and development to grasp the direction of the technology. Academician Lu Bingheng said, "The industrialization of 3D printing technology requires strategic financial support."
China's 3D printing "pioneer"
In 1992, Lu Bingheng went to the United States for exchange study. In a visit to the automotive mold enterprises, a 3D printing equipment caught his attention: "As long as the CAD data of the product into, you can make the prototype out." Lu Bingheng immediately decided to include 3D printing in the research object. Lu Bingheng said that Chinese enterprises have a strong production capacity, but the product development capacity is insufficient and the development speed is slow, this technology can help enterprises to achieve new product development quickly and at low cost. Lu Bingheng initially wanted to introduce 3D printing equipment, but at that time a core component laser to sell 30,000 U.S. dollars. Lu Bingheng decided to build one himself. At the end of 1997, the first 3D printing prototype developed by China was born, and in 2000, "some key technologies of additive manufacturing and its equipment", which was completed by Lu Bingheng, won the National Science and Technology Progress Award. Second Prize.
In December 2016, the National Additive Manufacturing Innovation Center was established in Xi'an. The institution is jointly established by Xi'an Jiaotong University, Beijing University of Aeronautics and Astronautics, Northwestern Polytechnic University, Tsinghua University, Huazhong University of Science and Technology and 13 related enterprises with a registered capital of 135 million yuan. Lu Bingheng introduced that the National Additive Manufacturing Innovation Center has developed various types of additive manufacturing processes and more than 10 major additive manufacturing equipment driven by energy such as laser, electron beam, ion beam, electric arc and electric heat; applied for 387 national patents, including 29 invention patents; and presided over or participated in the development of more than 40 industry standards.
3D printing technology is similar to the swallow mud nest, material little by little accumulation, to create three-dimensional objects, also known as additive manufacturing. 3D printing in new product development, the first manufacturing, etc., can significantly simplify the process, shorten the cycle and reduce costs. The 3D printing is used in a wide range of applications and will have great potential in the future. Lu Bingheng revealed that most of the domestic 3D printing orders are personalized, multi-variety, small batch, technically complex products, it is difficult to produce significant economic benefits and return on investment for a while. At present, 3D printing lacks capital support, which is not conducive to the long-term development of the industry.
"Some investors are more interested in making quick money, for some technically difficult, large investment or longer return period of technology or products, lack of willingness to invest." Lu Bingheng said. A new technology, from research and development to application promotion to experience a longer period of time. Applied to the aviation and medical field of 3D printing products, for example, aviation components must meet the airworthiness conditions, including materials, processes, testing, strength, high and low temperature, which requires a lot of experimental data for verification. 3D printing medical products are approved for clinical applications before, shall collect a large number of experimental data, during which can not be charged to patients, which means that the amount of money spent on research and development is larger.
"The 3D printing industry still has a long way to go, and we hope that more private capital with strategic vision will participate in the development and industrialization of 3D printing technology." Lu Bingheng said.
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Concrete is endowed with good printability and strength through the infiltration of stones by cement, and is also a common material for architectural 3D printing. Inspired by concrete, Professor He Yong's team (EFL team) from the School of Mechanical Engineering, Zhejiang University, proposed a new idea of "bio-concrete" ink: pre-functionalized cell-laden microspheres as "stones", high concentration of GelMA hydrogel prepolymerization solution as "cement", and a new "bio-concrete" ink. The team has developed a robotic in situ bio-3D printing system to achieve in situ repair of irregular wounds.
In situ bio-3D printing system combines surgical robotics and bio-3D printing technology to regenerate and repair tissue by depositing therapeutic bioink directly on the defect according to the morphology of the patient's tissue. In-situ bio-3D printing has many advantages because of the variability of application scenarios, which add many demanding requirements compared to conventional bio-3D printing.
1. Variable environment at the printing end: in the in situ printing scenario, the printing environment may be a battlefield, disaster relief, and other environmentally variable occasions, requiring stable ink rheology performance that does not affect printing performance when the printing environment changes from low to high temperatures over a wide temperature range.
2. repair at the blood and water and other effects: the ink should be able to maintain the structure at higher body temperatures and infiltration environment filled with blood and water does not collapse, the printed cells can efficiently survive, and rapid functionalization to play a role in damage repair as soon as possible.
3. Rapid functionalization: Compared with conventional biological 3D printing, which can be functionalized by prolonged perfusion, in situ printing requires the printed tissues to perform emergency functions quickly, and how to make the printed tissues functional quickly is an urgent problem.
4. superior adhesion properties: the printed structure needs to form a certain bond with the defective tissue to prevent it from detaching from the defect in the in vivo repair and causing secondary damage.
5. Acute rescue and treatment portability: the ink is suitable to be carried in the field in first aid kits for military, firefighting and other high-risk areas of emergency relief.
Compared with conventional bio-ink, "bio-concrete" ink has the following characteristics.
1. low strength cellular microspheres in the ink and high concentration of hydrogel printing in the microscopic similar to a series of microspheres + spring, local low modulus, overall high modulus, both cell development and printing structure shape maintenance ability.
2. the ink is not directly using cells as raw material, but cell spheres that have been cultured and have microstructure function, which can function faster in damaged locations after printing and accelerate tissue repair.
3. the ink has good temperature stability and can be printed in situ within the range of 4-37 °C.
4. since the ink body is a stable cured hydrogel microsphere, its deposition in the blood-water environment can also maintain the 3D morphology.
5. good adhesion of the printed structures thanks to the infiltration and hydrogen bonding of the hydrogel prepolymerization solution on the surface of the defective tissue.
6. the ink can be carried to the field by liquid nitrogen freezing, which is expected to be used for acute treatment in harsh environments such as battlefield and disaster relief.
In order to verify the adaptability of "bio-concrete" ink in in-situ printing scenarios, researchers have characterized the ink's rheological robustness, in-situ printability, composite mechanical properties, print/tissue binding, and in vivo repair ability, and designed an emergency rescue kit to make the ink system more portable.
Rheological robustness: Unlike crystals that have a fixed melting point (freezing point), the sol/gel state of temperature-sensitive bioink matrix materials such as gelatin is greatly influenced by temperature, which makes its rheological properties susceptible to temperature effects. In rheological characterization, the "bio-concrete" ink exhibits Bingham fluid properties and is highly robust to a wide range of temperature variations (4-37 °C) due to the dominant position of hydrogel microspheres in the ink system, allowing it to adapt to the complex and variable environmental conditions of in situ printing scenarios.
In situ printability: "Bio Concrete" inks can form uniform extruded fibers at low, medium and high temperatures at the extrusion end. Also, on the deposition side, it can be observed that even when conventional inks are extruded at the right extrusion printing temperature, they quickly over-solubilize and turn into a liquid, losing their 3D structure due to the high temperature of the receiving platform and the "blood" that fills it. The "bio-concrete" ink, on the other hand, is a stable photocross-linked microsphere, which can maintain a good 3D structure even in a high temperature and "blood" filled receiving environment. This demonstrates the ability of "bio-concrete" inks to adapt to the complex environment of the patient's injury during in-situ printing.
Print body/tissue bonding: The "cement" component of the "bioconcrete" ink can infiltrate the tiny gaps in the defective tissue, and after photo-crosslinking, it can form greater friction with the defective tissue and form stronger tissue bonding under the action of hydrogen bonding, preventing the print The photo-crosslinking creates a stronger tissue bonding force with the defect tissue and prevents the print from detaching.
Compound mechanical properties: The results of mechanical tests and simulations show that the high-strength network formed by the low-strength hydrogel microspheres in the "bioconcrete" ink and the high-concentration GelMA prepolymer after curing solves the contradiction between biocompatibility and mechanical properties, and confirms its mechanical suitability for in-situ printing.
Tissue repair ability: Since the "stone" phase is pre-functionalized cellular microspheres, it has good activity after printing to the traumatic location and can be functionalized rapidly, which can achieve effective repair of rat skull in 4 weeks.
Portability: A portable solution was designed for the "bio-concrete" ink, including an emergency kit with a thermos cup and liquid nitrogen for the "stone" and "cement" components, a mobile power supply, a USB heating pad, a sterile syringe, and a USB memory stick. The USB heating pad, sterile syringe, 3D printing nozzle, reagent spoon, paper towel, etc. can be combined with small robotic printing system or manual printing mode to quickly perform in-situ repair surgery in the field, making it suitable for on-site emergency rescue work in multiple scenarios in the future.
In addition, in real clinical cases, the tissue defects of patients can be caused by a variety of reasons, and the morphology and size of the defective structures caused by the accident can be very different. In order to verify the in-situ printing and repair capability of "bioconcrete" inks for different tissue defects, four rat "patient" models with different shapes and sizes of skull defects (approximately "rectangular The four rat "patient" models with different shapes and sizes of cranial defects (stretching body defect models with "rectangle", "square", "trapezoid", and "triangle" as the base surface) were used as four "patient" models with different cranial injury patterns and requiring in situ printing for repair. The in-situ printing platform is a robotic arm system.
A robotic arm system was used for the in situ printing platform, and a syringe pump system was clamped to the arm to provide a constant flow of ink. A conical plastic nozzle was used for the in situ printhead. In-situ printing was performed on the "patient" defect according to the different 3D structures of the skull defects of the "patient". After printing, the ink was light-cured using a 405 nm blue flashlight, and the patient's wound was finally sutured and disinfected. The experimental results showed that the "bio-concrete" ink is highly feasible and repairable for in situ repair of each "patient".
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The ecosystem of new energy vehicles is open, changing and dynamic. Traditional cars typically take three years from design finalization to new vehicle shipment, during which time the processes and supply chain for the production of these parts go into a solid state. A car company like Tesla, on the other hand, has software that is updated almost every month. The gene of digitalization can be said to be rooted in the blood of the new car-making forces.
The digitization brought about by 3D printing has enabled humanity to generate, for the first time, a real threshold of net economic gain: a demand-driven shift from overproduction to demand-driven production by synchronizing customer behavior with producer behavior.
3D printing is a technology with distinct digital characteristics, which means that additive manufacturing can change the way products are produced intrinsically, not only for personalization, but also for functional-oriented manufacturing, which makes 3D printing a "natural fit" with new energy vehicles in terms of manufacturing genetics.
According to the ACAM Aachen Additive Manufacturing Center, the ACAM Aachen Additive Manufacturing Center's (ACAM Aachen) vision for additive manufacturing in terms of multifunctional materials is an infinite combination of materials and technologies, with the ultimate goal of click-and-produce. Level 1 is a predictable additive manufacturing process; Level 2 is an automated additive manufacturing process; Level 3 is fully automated additive manufacturing (including pre-processing and post-processing); and Level 4 is an integrated and fully automated combination of different manufacturing processes [1]. Currently, the development of additive manufacturing worldwide is mostly at the Level 0 level.
Automotive production requires a high degree of automation, high efficiency, low cost, and consistent quality, which seems to have a lot of "gaps" with the current level of development of 3D printing. Therefore, the current status and future trends of 3D printing in automotive manufacturing need to be understood in the context of the characteristics of 3D printing technology.
According to ACAM Aachen Additive Manufacturing Center, on the one hand, 3D printing has changed the manufacturing logic. Usually for the same product, the more quantities produced by traditional manufacturing technology, the more the cost per part of the product tends to decrease; while for additive manufacturing, the correlation between cost per part and production volume is independent, which is a factor to be considered when considering scalability. On the other hand, regarding the complexity of the product. Usually, when producing parts through traditional manufacturing techniques, the more complex the product, the higher the cost, and the more expensive the company needs to invest (including new tooling and even new equipment to achieve it); whereas for additive manufacturing, the correlation between part complexity and cost is also independent, and the complexity of the part geometry usually does not bring additional manufacturing costs.
For automobiles, while there is a trend toward smaller batches for automotive production, the current integration of 3D printing technology with automobiles is not a factor in this area where the correlation between cost and yield of 3D printing technology is independent, but rather where 3D printing technology achieves more complex products.
In the field of metal 3D printing to reduce the cost of parts, the indirect metal 3D printing technology represented by binder injection metal 3D printing technology, with high speed and low cost has gained a high degree of industry attention. The HP metal 3D printing technology adopted by the public is exactly the binder injection metal 3D printing technology.
The binder injection metal 3D printing technology, from the perspective of production efficiency and economy, fully meets the requirements of automotive-oriented mass production applications. And the rich variety of printable materials (from metal to ceramic, metal-to-metal composites, ceramic-to-metal composites, etc.) further extends the applicable scenarios of binder injection metal 3D printing technology.
In addition to aluminum alloys and copper alloys used in automobiles, steel materials suitable for binder metal 3D printing technology currently include 17-4PH stainless steel, 304L stainless steel, 316L stainless steel, M2 tool steel, H13 tool steel, and also 4140 stainless steel, 420 stainless steel, 4340 stainless steel, 4605 stainless steel, and other materials under development [3].
In addition, the rapid development of plastic 3D printing and carbon fiber composite 3D printing has enriched the technological options for automotive 3D printing.
The automotive industry needs to take advantage of the specific advantages of 3D printing technology to enhance product design, however, one of the major challenges to break through in order to use 3D printing for specific automotive parts production is the economics. Currently, most of the automotive parts used for 3D printing are small batches of a dozen or so, and to increase to the up to one million production volumes commonly required by the automotive industry, 3D printing will have to break through the economics barrier.
The following will explore the current status and development trend of 3D printing technology in the field of new energy vehicles by introducing the latest application progress of 3D printing technology in Volkswagen, Ford, BMW and other companies.
l Volkswagen
VW released plans in 2019 to use HP metal 3D printing technology in VW vehicles, starting with mass customization and manufacturing of decorative parts, and integrating HP's HP Metal Jet metal 3D printed structural parts into next-generation vehicles as soon as possible, with an eye on increasing part sizes and technical requirements.
VW aims to manufacture 50,000 to 100,000 football-sized parts per year, which may include things like gearshifts and mirror mounts. Additive manufacturing is being deployed in the growing electric vehicle production sector for its lightweighting benefits. Currently, VW has established the California Innovation and Engineering Center (IECC), introduced a unique concept car with integrated 3D printing, and soon announced the production of 10,000 metal parts on the HP Metal Jet with GKN and HP. It is this milestone that paves the way for VW's continued collaboration with HP and the integration of VW's 3D printed structural parts into its next generation of vehicles.
Metal binder jet 3D printing technology will drive 3D printing technology in VW manufacturing toward maturity, making the technology cost effective. To take advantage of binder jetting, VW is expanding its partnership with HP to lay out additional capacity and bringing in Siemens to provide specialized software for the technology.
With Siemens' automation and software solutions, VW will be able to develop and produce parts faster, with more flexibility and using fewer resources. So far, the first automotive parts manufactured using binder jetting have been sent to VW's Osnabrück plant for certification. The part is used in the A-pillar of the VW T-Roc convertible and, according to the data, is half the weight of a conventional part made from steel sheet.
l Ford
Ford announced in 2021 that it plans to adopt 3D printing technology in the manufacture of vehicles at scale. Ford has had some degree of success with 3D printing technology before, though at the time it only involved lower volumes. But Ford's technology now extends well beyond low-volume 3D printing production applications, with 3D printed parts being developed for full production of Ford's "very popular models.
Ford's powder for binder jet metal 3D printing is Al6061, and the implications of successfully applying aluminum to 3D printed production of automotive parts are significant: the shift from traditional manufacturing processes to 3D printing processes will reduce weight, save space, and improve part performance by simplifying design, as well as saving cost and time.
For 3D printing next-generation electric motors, Ford has also formed an alliance with ThyssenKrupp and RWTH Aachen University to begin a study to develop a flexible and sustainable production process for next-generation electric vehicles. The name of the project being developed is HaPiPro2, referring to hairpin technology. Hairpin winding is a new technology in the field of electric motors, where rectangular copper rods replace wound copper wires. The process is easier to automate than conventional wound electric motors and is particularly popular in the automotive sector because it can significantly reduce manufacturing time.
The development of motor stator windings for electric vehicles is often a well-known bottleneck. The classical round wire winding has many limitations: the copper conductors, the winding process and the slot geometry must match; the conductors wound around each other form a solid pattern; in addition, the round conductors (the classical conductor shape) do not fit geometrically well with the trapezoidal recesses, with the result that each recess is half filled with copper, thus creating voids. The relatively small conductor cross-section ensures larger electrical heat losses.
3D printing avoids this development hurdle by eliminating the need for almost any tooling. Since conventional production involves complex bending and soldering processes, the time savings from 3D printing pay off, especially in the so-called hairpin windings.
Allowing a higher fill rate of copper, 3D printing offers unique advantages in this regard. Currently, the market is familiar with L-PBF selective laser metal melting 3D printing, as well as binder jet metal 3D printing, both of which are the most dominant application technologies.
By 3D printing motor copper coil windings, we are changing the way we have thought about motor coil design for over 100 years. The traditional process of copper wire or copper sheet is difficult to show the optimal design in the small space of motor stator and rotor, and 3D printing will bring certain changes.
l BMW
BMW held a joint project kick-off meeting for IDAM in Munich in March 2019 to pave the way for additive manufacturing to enter automotive series production. The IDAM team is pushing additive manufacturing technology in the direction of specific requirements to produce parts of consistent quality as well as individual spare parts based on specific components. The goal is to manufacture at least 50,000 series-produced parts and more than 10,000 spare parts per year using 3D printing technology. the IDAM line contains an open architecture that can be adapted to any LPBF system (selective laser metal melting 3D printing technology).
In 2020, BMW invested 15 million euros (over 100 million RMB) in the official launch of the Munich 3D printing plant, which establishes the BMW Group as a leader in additive manufacturing technology for the automotive industry.
Supported by the German IDAM program, BMW's 3D printing plant in Munich has also built a modular and almost fully automated 3D printing production line. The line covers the entire process from digital design to 3D printing and manufacturing of parts to post-processing. Thanks to the modular structure of the line, which can be upgraded if necessary, the individual modules can be adapted to different production requirements and also allow flexible control of the process steps. By taking into account the requirements for integration into the automotive production line, the project partners have reduced the manual part of the process chain from about 35% at present to less than 5%. At the same time, the unit cost of 3D printed metal parts was cut in half.
The above cases illustrate that many new designs, although not yet industrialized and still in their initial stages, will be overtaken by other companies and will soon find themselves at a competitive disadvantage if manufacturing companies do not make early preparations and innovate in spare parts and prototypes, starting with innovative thinking about design.
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In cutting-edge tissue engineering, drug development, and even clinical applications, the construction of in vitro models that mimic in vivo tissue structure and environment are very important conditions, and the way cells or microstructural units are assembled and the extracellular matrix environment plays a key role in the process of tissue functionalization, which has led to the development of three-dimensional tissue structure printing technologies. Among these technologies, projection light-curing and extrusion printing techniques are represented by the use of hydrogels containing cells as bio-ink materials, demonstrating superior biological tissue building capabilities. However, such printing is still limited to printing the bioink as a whole, and the cells in it are randomly distributed, making it difficult to actively form microstructural units on the cells, which is a current challenge for bioprinting.
In recent years, acoustic waves as an easy to integrate, high bioaffinity and high precision control means, in the flexible manipulation of cells and efficient assembly applications have been widely studied, such as the combination of acoustic waves and microfluidics of acoustic flow control and acoustic tweezers technology, especially suitable for manipulating cells to build in vitro models of tissue-like. How to extend the two-dimensional acoustic field manipulation technology to three-dimensional and three-dimensional tissue structure assembly is the challenge that needs to be solved for its advancement to biological 3D printing. Recently, Prof. Lujian Chen and Assistant Prof. Xuejia Hu from Xiamen University and Prof. Yi Yang's group from Wuhan University collaborated to propose a new solution: combining lamellar printing and acoustic manipulation of cellular 3D structure assembly, and published in the journal Biofabrication with the title: Smart acoustic 3D cell construct assembly with high-resolution. Biofabrication.
Drawing on the idea of multilayer light-curing printing, this study proposes the direct manipulation of cell composition feature structures in gel lamellae based on acoustic surface waves and the multilayer assembly of lamellae units, successfully realizing the 3D structure assembly and bionic tissue construction of cells. A schematic diagram of this strategy is shown in Fig. 1. The technique is designed with a six-fold rotationally symmetric transducer configuration on a Z-cut lithium niobate substrate to ensure a large degree of modulation freedom, which enables the assembly of cells in the lamellae into diverse structures through wave vector combination, phase combination and amplitude modulation. And to expand the two-dimensional acoustic field generated by surface waves and two-dimensional cell structures into three-dimensional space, the PμSL high-precision 3D printing technology (nanoArch P150, MUFON Precision) was used to fabricate a high-precision modular frame to couple with the surface wave acoustic field and to realize cell assembly in that frame. gelMA 60, as a bio-ink, is light-cured to form a gel lamella with microstructured gel lamellae. The gel lamellae are then used as two-dimensional units for the alignment and assembly of multiple layers and the fusion of hydrogels to obtain microscopic three-dimensional structures immobilized by the gel matrix.
As a demonstration, a variety of acoustic field structures generated by the modulation of acoustic devices in combination with 3D printed components with different characteristic units, such as the ring-like structure of blood vessels, the honeycomb structure of liver-like lobules, and the dotted structure of dense stacks, etc., and their ability to perform flexible cell assembly was experimentally verified. Through secondary 3D assembly, the researchers have achieved a variety of 3D cellular-scale tissue-like models, including hollow tubular capillary tissue, interwoven tissue structures, and honeycomb-like tissue of liver lobules. The scales of these feature cells depend on the period of the acoustic field and can be designed to vary from tens to hundreds of microns. In three dimensions, the thickness of these lamellae can be as low as 100 μm, thanks to the use of high-precision printed cell structures, which can be designed to fit the needs of different tissue heights with different interlayer distances. These 3D tissue-like models show good activity after culture, and the microscopically tightly connected bionic structures further promote the process of cell and tissue functionalization, such as the experimental verification that the tubular 3D models show interconnected fusion and vascularization tendency during long-term culture.
This acoustic cell 3D assembly technique extends the two-dimensional manipulation capability of acoustic surface waves to three-dimensional space, demonstrating unique advantages such as direct cell assembly, precise construction of tissue structures, flexibility and control, and ease of operation. This study demonstrates the ability to construct microscopic media beyond bio-ink printing, proposing an innovative technological route from a new dimension.
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There is an ancient magic pen Ma Liang, holding a magic pen, painting cattle painting sheep painting waterwheel, help folks "paint" all the needs of life and labor! With the rapid development of modern technology, the magic of 3D printing technology! The fantasy of "painting" everything becomes reality!
In the afternoon of August 9, a smoothly shaped light electric car - XEV-YOYO - was parked in the exhibition hall of Hefei YOYO Technology Co. As the main product of Hefei YOYO, XEV-YOYO is born from 3D printing technology, and it is the first electric car in the world that uses 3D printing technology to mass-produce interior and exterior body parts.
XEV-YOYO is the world's first electric vehicle to use 3D printing technology for mass production of interior and exterior body parts. "3D printed cars are shorter and cheaper in terms of production, a car takes only 2 weeks from parts design to output, compared to about 3 to 6 months for ordinary cars." Wu Jiawei, director of additive manufacturing at Hefei Youyao Technology Co.
The XEV electric vehicle does not need the molds used in traditional car manufacturing, truly customizing the flexible production on demand, reducing the time and cost investment of the whole vehicle development by more than 80%. At present, Hefei YoYo has realized the 3D printing of door panels, front and tail fins, and is still in the process of unlocking the "printing" of various parts of the car.
A fully charged XEV-YOYO can have a maximum range of 150 kilometers and a maximum speed of about 80 kilometers per hour. The battery can be replaced in 3-5 minutes at a designated location when the power is depleted, or in 3-4 hours using a home charging pile. In major European countries, city trips, short-distance travel, and transporting children to and from school ...... this nimble electric car has stepped into a rich life scenario.
The world's first electric car whose interior and exterior body trim parts are mass-produced using 3D printing technology - XEV-YOYO part of the personalized and customized body trim parts.
"'Core screen steam together Acute lifelong wisdom', in the field of new energy vehicles, Hefei has the advantage of supply chain and the advantage of R&D talents." In November 2020, Hefei YoYo settled in Xinzhan High-Tech Zone with a total investment of 600 million yuan. in February 2021, the first batch of 3D printed prototype cars totaling 40 units were successfully delivered. Today, Hefei YoYo has 50 3D printers and can produce 3,000 to 4,000 electric vehicles per year. At present, XEV has independently developed the YOYO 3D printed electric vehicle complete vehicle platform, including the chassis system, body electronic system, suspension system and other complete vehicle body architecture and interior and exterior design. The whole vehicle 3D printing not only can improve the integration strength of the body, but also can customize the "skin".
"This year's sales are double that of the same period last year, and can meet the needs of small customer groups customization." Wu Jiawei said. Next year, the XEV-YOYO, popular overseas, will be sold simultaneously in China, and the high-speed version of the XEV-YOYO will reach a maximum speed of 100 kilometers per hour and can be driven on intercity highways. The car's interior and seats will be adjusted and improved in terms of comfort and functionality to match the driving habits of the Chinese people.
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