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Viewing 211 to 240 of 19658
Technical Paper
2014-04-28
Swapnil Pawar, Sandip Patil, Suhas Joshi, Rajkumar Singh
Abstract Tapping is an important process in assembly of aircraft structures because on an average one millions of tapped holes are made on an aircraft structure. However, sudden breakage of the tap is the most undesirable event frequently encountered during the tapping process. In particular, this can mostly occur when small diameter internal threads are made in a ‘difficult-to-cut’ material like titanium. For this reason, it has been a topic of industrial interest in the manufacturing sector for many years. The ultrasonic vibrations assisted tapping (UVAT) is a novel manufacturing technology, where ultrasonic vibrations are provided to the work piece in the axial direction. The present work is a comprehensive study involving experimental characterization. The experimentation shows that UVAT reduces the torque during tapping as compared to that of in conventional process. There is a 19.1% reduction in torque and about 20.3% reduction in cutting temperature in UVAT over that of in CT. The experimental analysis of UVAT process also shows that the superior surface and better machinability in UVAT over that of in CT.
Technical Paper
2014-04-28
Pradip K Patra, Srimanta Sam, Mrigandra Singhai, Neel Kant
Abstract Automobile manufacturers have started using ultra high strength steel (UHSS) in lower thicknness to reduce the weight of their car and improved passenger safety. As a result steel manufacturers are facing continuous challenges to develop Ultra high strength steels (UHSS) in lower thicknesses with suitable formability. In line with this, Indian steel manufacturers has also started developing different UHSS which includes hot rolled DP540/DP590/DP780/SPF590 etc. for automotive wheel rim applcation and S500MC/S650MC for automotive log and cross member application. ALM650 is one such UHSS grade recently developed whose yield strength (YS) requirement is >650 MPa, tensile strength (UTS) requirement is >700 MPa and total elongation >14%. This newly developed UHSS, conforms to the specification of S650MC as per EN-10149-2. Chemistry and rolling parameters were designed taking into consideration of mechanical properties requirement including fatigue strength, suitable microstructure to achieve this combination of properties as well as the CSP process characteristics.
Technical Paper
2014-04-28
Sagar Bajaj, Deepak Wakode, Gopal Musale
Abstract In an era of exceptional digital computation and immense indulgence in the theoretical behavior of sheet metal during its manufacturing process, the simulation of sheet metal forming becomes the most feasible and viable option for every OEM to consider this prior to its manufacturing. This paper contains a methodology for using an optimizing tool like Hyper Study to get the best formed part by incorporating forming benchmarked parameters like FLD (forming limit diagram), percentage thinning and plastic strains as responses by building up expressions among various variables and thus optimizing the forming process parameters like blank holding pressure, sliding friction, and Draw bead restraining force effectively to meet the formability requirements. This would reduce the time and effort of a forming engineer to reiterate among these parameters to get the desired result effortlessly.
Technical Paper
2014-04-28
N. P. Gurao
Abstract Formability of metals and alloys in general and aluminium alloys and steels in particular is of paramount importance in sheet metal forming in automobile industry. It is well understood that the evolution of preferred crystallographic orientation of crystallites or texture during prior thermo-mechanical processing of sheets plays an important role in determining formability. The formability of sheet is measured in terms of the Lankford parameter or the plastic strain ratio which is defined as the ratio of strain in width direction to that in the thickness direction (R = εw/εt). The variation of Lankford parameter with the rolling direction and standard and ΔR value is widely used in industry as a standard for estimating the formability of the rolled sheets. In the present investigation, we have used the viscoplastic self-consistent simulations to theoretically calculate the variation of the Lankford parameter with rolling direction for different crystallographic texture in model face centre cubic and body centre cubic material.
Technical Paper
2014-04-28
Christiane Fourment, Julien Barlier, Mickael Barbelet, Patrice Lasne, David Cardinaux
Abstract Virtual forming tools based on Finite Element simulation are routinely used in order to improve process design and to reduce time to market. However, with the growing requirements with regards to in-use properties of forged components, not only the forming processes must be simulated but the entire process chain, including the heat treatment processes that are carried out to improve the mechanical properties of the final part. In order to meet these needs, new heat treatment features have been introduced into the commercial code FORGE®. This paper presents an application of induction hardening to an industrial component. This application demonstrates the strategic capabilities of FORGE® commercial software to achieve production challenges.
Technical Paper
2014-04-28
Vinand V. Arabale
Abstract Superplastic forming is a process designed for sheet material allowing elongation of several hundred percent. In superplastic forming process material is formed at particular strain rate at particular temperature with the application of pressure. The target strain rate is maintained by the varying the pressure during the forming process. The most challenging part of superplastic forming is the prediction of range of variation of pressure to maintain the target strain rate. Though several analytical models, such as Dutta equation, for predicting the pressure are available, FEA simulation with the help of MSC Marc offers great advantage of predicting the pressure accurately. FEA simulation study also helps in predicting the thinning that occurs during forming. One can also study the effect of friction on the thinning characteristics. The present paper discusses FEA simulation results of superplastic forming of Aluminium alloy. The FEA results are used for predicting the range of variation of pressure required to maintain the target strain rate during superplastic forming.
Technical Paper
2014-04-28
A. R. Kumbhar, S. A. Kulkarni, J. M. Paranjpe, N. V. Karanth
Abstract New process development of forging component require lot of process knowledge and experience. Even lots of trial-and-error methods need to be used to arrive at optimum process and initial billet dimensions. But with help of reliable computer simulation tools, now it is possible to optimize the complete process and billet dimensions without a single forging trial. This saves lot of time, energy and money. Additionally, simulation gives much more insight about the process and possible forging defects. In this paper, a complete forging process was needed to be designed for a complex component. With the help of computer simulation, the complete conventional forging process and modified forging process were simulated and optimized. Forging defects were removed during optimization of the process. Also billet weight optimization was carried out. Deciding the pre-forming shape of the billet was the main challenge. With use of computer simulation, an innovative pre-forming shape was arrived resulting in reducing billet input weight.
WIP Standard
2014-04-27
This specification covers aluminum-beryllium powders consolidated by hot isostatic pressing (HIP) into the form of bar, rod, tubing, and shapes.
WIP Standard
2014-04-27
This specification covers an aluminum-beryllium alloy in the form of bars, rods, tubing, and shapes consolidated from powder by extrusion.
WIP Standard
2014-04-27
This specification covers an aluminum-beryllium alloy in the form of sheet and plate consolidated from powder by extrusion and then rolled.
WIP Standard
2014-04-27
This specification covers beryllium in the form of bars, rods, tubing, and machined shapes from vacuum hot pressed powder.
WIP Standard
2014-04-27
This specification covers beryllium in the form of bar, rod, tubing, and shapes fabricated from beryllium powder consolidated by hot isostatic pressing (HIP).
WIP Standard
2014-04-27
This specification covers beryllium in the form of bar, rod, tubing, and shapes fabricated from beryllium powder consolidated by cold isostatic pressing (CIP) and sintering.
WIP Standard
2014-04-27
This specification covers beryllium in the form of bars, rods, tubing, and machined shapes from vacuum hot pressed powder.
WIP Standard
2014-04-27
This specification covers beryllium in the form of bars, rods, tubing, and machined shapes from vacuum hot pressed powder.
WIP Standard
2014-04-27
This specification covers beryllium in the form of sheet and plate produced by hot rolling beryllium block.
WIP Standard
2014-04-27
This specification covers an aircraft-quality, low-alloy steel in the form of sheet, strip, and plate.
WIP Standard
2014-04-27
This specification covers an aircraft-quality, low-alloy steel in the form of sheet, strip, and plate.
WIP Standard
2014-04-27
This specification covers an aircraft-quality, low-alloy steel in the form of sheet, strip, and plate.
WIP Standard
2014-04-27
This specification covers an aircraft-quality, low-alloy steel in the form of sheet, strip, and plate.
WIP Standard
2014-04-27
This specification covers quality assurance sampling and testing procedures used to determine conformance to applicable specification requirements of wrought carbon and low-alloy steel products and of forging stock.
WIP Standard
2014-04-27
This specification covers an aircraft-quality, low-alloy steel in the form of sheet, strip, and plate.
WIP Standard
2014-04-27
This specification covers an aircraft-quality, low-alloy steel in the form of sheet, strip, and plate.
Article
2014-04-25
The demand for innovative manufacturing technology that produces lighter parts with stronger material grows each day in the competitive aerospace industry. 3-D printing, also known as “additive manufacturing,” is at the center of this innovation.
Standard
2014-04-24
This specification covers a titanium alloy in the form of investment castings having four grades of permissible discontinuities.
Standard
2014-04-24
This specification covers titanium Ti 6Al-4V alloy in the form of investment castings.
Standard
2014-04-24
This specification covers a titanium alloy in the form of investiment castings.
Article
2014-04-23
In a bid to deliver a system that combines quality control with process control, Hexagon introduces its 360° Smart Inline Measurement Solutions for automotive applications.
Article
2014-04-23
Available for the first time in the U.S., FORGE GUARD from FUJIFILM Electronic Materials U.S.A., Inc. is a security label that offers manufacturers of automobile parts or machinery a new alternative for their brand and anti-counterfeiting protection requirements.
Technical Paper
2014-04-20
Ala Qattawi, Mahmoud Abdelhamid, Ahmad Mayyas, Mohammed Omar
1 The manufacturing of Origami based sheet metal products is a promising technology, mostly in terms of reducing the tooling and process complexity. This procedure can also be called fold forming, as it depends on exclusively shaping the required geometry via sequence of bends. However, the design analysis and modeling of folded sheet metal products are not fully mature, especially in terms of determining the best approach for transferring the analysis from a three-dimensional (3D) to a two-dimensional (2D) context. This manuscript discusses the extension of the Origami technique to the fold forming of sheet metal products represented in modeling approach and design considerations for the topological variations, the geometrical validity, and the variance of stress-based performance. This paper also details the optimization metrics that were developed to reflect the design and manufacturing differences among the possible topological and geometrical options for a single part design. These metrics target five different optimization objectives: material utilization, cost, ease of manufacturability, ease of handling, and mechanical behavior estimation.
Viewing 211 to 240 of 19658

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