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The outstanding lightweight construction opportunities and potential for incorporating smart components of composite materials make them increasingly attractive for machinery manufacturers, reports the Composites Europe trade show.
Be it gripper systems, cones, con rods, oscillating beams or buncher bows, blades, robot arms, springs, drive shafts, rollers or components for textile and machine tools, there are already many applications in machinery production realised with the help of glass fibre reinforced plastic (GFP) or carbon fibre reinforced plastic (CFRP).
“There are no big volumes or large series in production yet but there are many niche areas with high potential,” says the study Serienproduktion von hochfesten Faserverbundbauteilen – Perspektiven für den deutschen Maschinen- und Anlagenbau (Mass Production of High-Strength Fibre Composite Components – Perspectives for German Machinery and Plant Manufacturers) published in 2012 by Roland Berger Strategy Consultants and the VDMA-Forum Composite Technology. Experts forecast moderate growth and regard technical necessities as well as efficiency and economic aspects as key drivers.
This forecast is supported by more recent studies. In its current survey of market KPIs for fibre reinforced plastics Composites Germany polled member companies of the four professional organisations AVK, CCeV, CFK-Valley and VDMA-Arbeitsgemeinschaft Hybride Leichtbau Technologien and published the results earlier this year in the 10. Composites-Markterhebung (10th Composites Market Survey). According to this survey, machine manufacturing is stated more and more often as one of the user industries on the composites market expected to generate substantial growth.
In its report Bestandsaufnahme Leichtbau in Deutschland (Taking Stock of Lightweight Construction in Germany), published in 2015, the VDI Centre for Resource Efficiency sees machinery and plant construction as a large and growing market for lightweight construction solutions. Manufacturing for the energy sector and medical device technology shows great dynamism, it says. The authors write: “The biggest lightweight construction markets in machinery manufacturing in the short to medium term lie in high-strength steel, aluminium as well as fibre reinforced plastics (GRP, CFRP, etc.).”
The report goes on to say that the materials are being increasingly used for moving components: “One research focus is the development of highly dampening, lightweight construction composites designed to achieve higher machining precision and speed, longer service life as well as less tool wear.” In addition, experts have identified social benefits associated with the use of composites in mechanical engineering: “Lightweight construction also affords us with a technology for older users since lighter production machinery can reduce work-related loads.”
Within the composites segment applications and market outlooks vary by fibre composite. GRP is predominantly used in the shape of profiles or tubes and tanks in plant manufacturing and they are produced by a spinning or wrapping process. This segment, however, is the “only declining one on the European GRP market,” says the Composites-Marktbericht 2017. Nevertheless, the potential for tubes is still enormous because GRP only accounts for 3-5% of the total market, especially for large diameters.
Small market share, big growth potential – this also holds true for CRFP. The experts at Carbon Composites admit that machinery and plant manufacturers are still hesitant about using composites but materials like this are convincing decision-makers more and more often. Because “these materials give machinery manufacturers many benefits with their high innovation potential, for example,” reads the market study. In various applications highly dampening, lightweight composites permit a substantial reduction in moving masses. This effect and high vibration dampening are extremely advantageous for highly precise machine tools. This allows machines to be designed with smaller drives and for lower machining forces. As a result, precision and quality rise, as do machine and tool life.
In machinery manufacturing composites are predominantly used as sandwich and profile structures in the form of CFRP-boards and profiles while semi-finished CFRP parts are increasingly joined by adhesive bonding. These components are suitable for very stiff structures that make for a very high positioning precision even when exposed to enormous acceleration forces. A targeted selection of fibres and corresponding layering allows an advantageous E-modulus to be achieved that is almost twice as high as that of steel despite very low weights. Add to this, CFRP components can be designed for minimum thermal expansion.
Technological advances in the process chain are among the current drivers pushing the development of efficient lightweight construction solutions and their implementation in high-volume production. On 6-8 November, Composites Europe will showcase the manufacturing processes used to make fibre reinforced plastics, from raw materials to processing methods to lightweight construction innovations in automotive engineering, aerospace, boatbuilding, wind energy and construction.
Image provided by Composites Europe
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