60 Excellent Inventions in Metal Forming by A. Erman Tekkaya, Werner Homberg, Alexander Brosius PDF

By A. Erman Tekkaya, Werner Homberg, Alexander Brosius

ISBN-10: 3662463113

ISBN-13: 9783662463116

ISBN-10: 3662463121

ISBN-13: 9783662463123

60 novel ways in steel forming are offered and defined intimately. Contributions from said overseas scientists representing the state-of-art in steel forming open a normal view on fresh effects and a transparent view on calls for for brand spanking new examine initiatives.

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Sheet Material Characterization with the In-Plane Torsion Test: Cyclic Loading, Grooved Specimen and Twin Bridge Specimen Heinrich Traphöner, Qing Yin, and A. Erman Tekkaya 1 Motivation In today’s industry the Finite-Element-Analysis (FEA) is essential for the design of parts and processes. Typical operations are the analysis of springback or failure. Due to the elastic component of the strain remaining after the forming of sheet metal components internal stresses occur, which ensure that the deformed components spring back elastically, whereby the final shape of the contour differs from the tools [1].

Two set of experiments were performed. The first set involved contactors machined from PVD TiN coating. Contactors of the second set were from CVD TiN coatings. The CVD TiN coated tool shown better results in terms of friction and lifetime (Fig. 6). Significant adhesion was observed followed by chipping of the transferred steel much later than for the PVD coating. 6. In this case of forming process, the CVD TiN coating was the most appro- Fig. 5 Evolution of the coefficient of friction as a function of the ageing of the soaping phosphate line from [5] Fig.

In BUT testing the back tension is delivered by axis 2, whereas PST, DBT and SRT are carried out using axis 3 for the required test load. The sheet material is fed from coil, which may be more than 1000 m in length in case of 1 mm strip thickness implying that thousands of repetitions are possible. Lubrication is applied by two felt rolls. Control of the three axes is performed by a PLC, which is programmed for each test via a PC with a custom made LabView program. The range of operational parameters is: Sliding length: 0–250 mm, sliding speed: 0–150 mm/s, cycle time: 0–95spm, load on axis 1 and 2: 0– 50 kN; load on axis 3: 0–10 kN.

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60 Excellent Inventions in Metal Forming by A. Erman Tekkaya, Werner Homberg, Alexander Brosius

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