Elektrostatische Greifersysteme für den Leichtbau*/Electrostatic grippers for lightweight productions - Form- and area-adaptive electrostatic gripper systems for high-performance materials

2015 ◽  
Vol 105 (09) ◽  
pp. 567-572
Author(s):  
C. Brecher ◽  
C. Kukla ◽  
R. Schares ◽  
M. Emonts
Keyword(s):  
High Performance ◽  
Textile Materials ◽  
Reinforced Plastics ◽  
Rtm Process ◽  
Process Chains ◽  
Fiber Reinforced Plastics ◽  
Adhesive Effect ◽  
Transfer Moulding ◽  
Automated Handling ◽  
Gripper Systems

In der Herstellung von Leichtbaukomponenten aus faserverstärkten Kunststoffen treten Handhabungsvorgänge mit empfindlichen, luftdurchlässigen, biegeschlaffen Materialien auf. Um diese Vorgänge in der Produktion etwa in RTM (Resin Transfer Moulding)-Prozessketten zu automatisieren, hat das Fraunhofer IPT einen Greifer für die Handhabung textiler Materialien entwickelt. Dieser Greifer basiert auf der elektrostatischen Adhäsion und ermöglicht automatisiertes Handhaben und Drapieren textiler Hochleistungsmaterialien.   Handling operations with sensitive non-rigid, air-permeable materials are often found in the production of lightweight products made out of fiber-reinforced plastics. In order to further automate the production of light-weight components, for instance in RTM-process-chains, Fraunhofer IPT developed a gripping system especially suitable for sensitive textile materials. This gripper is based on the electro-adhesive effect and enables for the automated handling and draping of textile materials.

scholarly journals Simulation of Mould Filling in Resin Transfer Moulding

1998 ◽  
Vol 7 (1) ◽  
pp. 096369359800700 ◽  
Author(s):  
H.G.H. Van Melick ◽  
G.A.A.V. Haagh ◽  
F.N. Van De Vosse ◽  
T. Peijs
Keyword(s):  
Finite Element ◽  
Production Method ◽  
Finite Element Code ◽  
Resin Transfer Moulding ◽  
Finite Element Program ◽  
Reinforced Plastics ◽  
Rtm Process ◽  
Simulation And Experiment ◽  
Transfer Moulding ◽  
Good Agreement

Resin transfer moulding is a production method of fibre reinforced plastics which involves the flow of a resin through a mould packed with dry reinforcement. As simulation by finite element code can be a useful tool in designing the mould or optimising the process, mathematical modelling of RTM is indispensable. The equations concerning the isothermal RTM process with a Newtonian fluid are implemented in the finite element program VI p, applying the ‘thin film approximation’. To validate the code, model experiments are performed in which the position of the front as a function of time is monitored and compared to the results of a finite element simulation. A good agreement between simulation and experiment was found. For further validation of more complex mould geometries a plate with inserts is considered. Again good agreement was found between simulation and experiment was found. The finite element code of VI p proves to give reliable and accurate results in the simulation of the isothermal filling process of RTM and can therefore be used for designing mould geometries or optimisation of the RTM process as a whole.

Development of a Reference Part for the Evaluation of Economic and Ecological Impact of Future Process Chains in Mold Core Making

2016 ◽  
Author(s):  
Markus Kafara ◽  
Hans-Henrik Westermann ◽  
Eva Eisinger ◽  
Rolf Steinhilper
Keyword(s):  
Ecological Impact ◽  
Small Scale ◽  
Scale Production ◽  
Lightweight Construction ◽  
Reinforced Plastics ◽  
Complex Process ◽  
Geometrical Features ◽  
Process Chains ◽  
Fiber Reinforced Plastics ◽  
Industry Sectors

Driven by the high importance of resource efficiency the importance of lightweight construction rises across all industries. Due to their high lightweight construction potential, carbon fiber reinforced plastics (CFRP) are increasingly applied. But CFRP manufacturing often is an expensive small-scale production where it is necessary to use removable mold cores to manufacture hollow parts. To improve the complex process of mold core making future process chains including additive manufacturing (i.e. 3D-printing) can be used. This paper provides a proposal for a hollow CFRP reference part based on facts taken directly from the field of application. The reference part will allow the evaluation of economic and ecological impact of process chains in mold core making for the CFRP production. Therefore, representative parts from different industry sectors were selected and analytically examined regarding their geometrical features. Based on a scientific recomposition of these features the reference part was developed.

Automated Assembly of Fibre Preforms for Economical Production of High Performance Composite Parts

2007 ◽  
Author(s):  
I. Gebauer ◽  
C. Do¨rsch ◽  
K.-D. Thoben ◽  
D. H. Mu¨ller
Keyword(s):  
Flexible Manufacturing ◽  
High Performance ◽  
Cost Effective ◽  
Experimental Investigations ◽  
Resin Infusion ◽  
Cycle Times ◽  
Reinforced Plastics ◽  
Flexible Material ◽  
High Performance Composite ◽  
Automated Handling

The demand of the market and the application require innovative process technologies for fast, cost-effective and quality-driven manufacturing of components made of fibre reinforced plastics. The Bremen Institute for Engineering Design (BIK) is developing and improving machineries and process technologies for the automated handling of fabric parts. Beside resin infusion processes, the handling of angular flexible material has become an important task to improve part quality and process cycle times. As a result of the systematic development current handling devices and installed applications will be demonstrated in this paper. For the production of FRP-parts by resin infusion processes several handling strategies are possible. The prototypes of the effectors are implemented in a flexible manufacturing cell. The feasibility of the implemented handling systems is proven by experimental investigations.

The Effect of Laser Focal Point Distance on Carbon Fiber Reinforced Plastics (CFRP) Cutting Performance

2013 ◽  
Vol 315 ◽  
pp. 778-782
Author(s):  
Norzaina Abdul Rahman ◽  
Wahab Saidin ◽  
Erween Abdul Rahim ◽  
Z. Mohid
Keyword(s):  
Carbon Fiber ◽  
High Performance ◽  
Focal Point ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced Plastics ◽  
Reinforced Plastics ◽  
Focal Position ◽  
Fiber Reinforced Plastics ◽  
Carbon Fiber Reinforced ◽  
Point Distance

Carbon fiber reinforced plastics (CFRP) composites as high performance material in aerospace industry. The application of laser technology to cut the CFRP shows promising advantages. The present study focuses the effect of focal point distance on the kerf width, HAZ, taper angle and morphology surfaces when cutting CFRP using laser process. Experiments have been conducted on CFRP and microstructure of the cross-section of the HAZ during cutting was analyzed. The results showed that focal position gave a significant effect on the cutting characteristic.

Characterization of Metal Inserts Embedded in Carbon Fiber Reinforced Plastics

2015 ◽  
Vol 825-826 ◽  
pp. 506-513 ◽  
Author(s):  
Johannes Gebhardt ◽  
Florentin Pottmeyer ◽  
Jürgen Fleischer ◽  
Kay André Weidenmann
Keyword(s):  
Load Transfer ◽  
Load Capacity ◽  
Lightweight Design ◽  
Failure Behavior ◽  
Fiber Reinforced ◽  
Reinforced Plastics ◽  
Rtm Process ◽  
Fiber Reinforced Plastics ◽  
Bearing Stress

The use of fiber-reinforced-plastics (FRP) contributes to an efficient implementation of lightweight design due to their outstanding specific mechanical properties. The RTM process offers great design freedom and allows the integration of functional elements during manufacturing. Embedded metal elements, so-called inserts, can be used to deal with the load transfer to structural parts. These elements have distinctive characteristics in comparison to other joining technologies. For example, detachable connections can be established with the help of inserts. Due to the fiber continuity not being interrupted and, subsequently, the FRP parts not having to be drilled, there is no local bearing stress. This paper aims at the characterization of metal inserts in FRP parts. The parts are manufactured using the RTM process with a specially adapted RTM mold with exchangeable cartridges for different insert geometries. The inserts are made of metal sheets with welded bushings and are embedded during preforming. The cured FRP specimens are tested under different load conditions to evaluate their suitability for various fields of application. Furthermore, the diameter and thickness of the metal sheet of the insert as well as the thickness of the FRP are varied to identify their influence on the failure behavior and load capacity under tensile loads.

The Hybrid RTM Process Chain: Automated Insertion of Load Introducing Elements during Subpreform Assembling

2015 ◽  
Vol 794 ◽  
pp. 312-319 ◽  
Author(s):  
Fabian Ballier ◽  
Jan Schwennen ◽  
Julian Berkmann ◽  
Jürgen Fleischer
Keyword(s):  
Automobile Industry ◽  
Process Chain ◽  
Structural Components ◽  
Fiber Reinforced ◽  
Transfer Molding ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastics ◽  
Rtm Process ◽  
Reinforced Plastic ◽  
Fiber Reinforced Plastics

Fiber reinforced plastics are increasingly employed in the automobile industry. The process chain of resin transfer molding offers one approach for realizing structural components made of fiber reinforced plastic in high quantities. In order to increase economic efficiency, automated solutions for the subpreform assembly are required. There is also the need for mechanically highly stressable and at the same time economical joining techniques for joining fiber reinforced plastics with metal. The following article shall provide an approach to meet both of these requirements.

The Study of Different Area Weight of Fibers as Ablative Polymer-Based Composite for Solid Rocket Motor

2018 ◽  
Vol 783 ◽  
pp. 56-61
Author(s):  
Phimraphas Ngamsantivongsa ◽  
S. Boonthalarath ◽  
B. Wong-Ek ◽  
S. Nuanklai ◽  
T. Kanasittiboon ◽  
...  
Keyword(s):  
High Performance ◽  
General Term ◽  
Resin Matrix ◽  
Fiber Reinforced ◽  
Solid Rocket Motor ◽  
Reinforced Plastics ◽  
Heating Source ◽  
Ablation Resistance ◽  
Fiber Reinforced Plastics ◽  
Solid Rocket

High performance composites are becoming progressively significant in the aerospace industry for severe temperature. Fiber Reinforced Plastics (FRP) is a general term for composite materials or parts that consist of a resin matrix containing reinforcing fiber such as glass or fiber with more strength or stiffness than the resin. FRP is mostly used to denote glass fiber-reinforced plastics. In this study, the test composites were obtained from a phenolic resin (PR) with different area weight of fibers for comparing the ablation resistance using the hot compression molding technique. The ablation performance of the composites was investigated under an oxy-acetylene torch. An oxyacetylene torch, providing temperatures above 2300 °C, was chosen as the heating source. Moreover, the physical properties of the composites were determined by using standard experimental methods. These experimental results indicated that the fabricated composites with greater area weight of fibers exhibited outstanding mechanical properties and excellent ablation resistance. The overall experimental characteristics of the PR/EWR600 composites meet most of the necessary high temperature application criteria.

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