Hydroforming applications in automotive: a review

Tolazzi, Massimo

doi:10.1007/s12289-010-0768-2

Cited by 39 publications

(22 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 9 illustrates the effect of compressive normal stress on FLD of AlMgSiO 5 for T-shaped part. It can be seen that with the increase in the compressive normal stress (e.g., 3 ), the FLDs shift up. Besides, increasing the compressive normal stress causes to move the entire FLD to the right.…”

Section: Resultsmentioning

confidence: 99%

Forming limit diagram of tubular hydroformed parts considering the through-thickness compressive normal stress

Hashemi

Abrinia

Assempour

et al. 2014

Proceedings of the Institution of Mechanical Engineers, Part L:

View full text Add to dashboard Cite

In this study, the effect of a compressive normal stress has been considered in the determination of forming limit diagrams and forming limit stress diagrams to predict neck initiation failure in tube hydroforming of T-shaped parts. Computation of the forming limit diagrams and FLSDs is based on the generalized Marciniak and Kuczynski method to consider the existence of through-thickness compressive normal stress. The proposed forming limit diagrams and FLSDs were used in conjunction with ABAQUS/EXPLICIT finite element simulations to predict the onset of necking in tube hydroforming of T-shaped part. The amount of calibration pressure and axial feeding required to produce an acceptable part in finite element method was compared to published experimental data, and a satisfactory agreement between the FEM and test results has been achieved. Therefore, the present approach can be used as a reliable criterion to design tube hydroforming processes and reduce the number of costly trials.

show abstract

Section: Resultsmentioning

confidence: 99%

Forming limit diagram of tubular hydroformed parts considering the through-thickness compressive normal stress

Hashemi

Abrinia

Assempour

et al. 2014

Proceedings of the Institution of Mechanical Engineers, Part L:

View full text Add to dashboard Cite

show abstract

“…Basically, the hydroforming process can be classified into two categories, sheet hydroforming and tube hydroforming [18], according to the different process features and the usage of different original blanks.…”

Section: Hydroforming Process (Hf)mentioning

confidence: 99%

“…Recently, the enthusiasm generated by HDD technology has cooled down, mainly due to the reasons discussed below [18], miscalculations on these two aspects keeping the SHF process away from series production:…”

Section: Hydroforming Process (Hf)mentioning

confidence: 99%

See 1 more Smart Citation

A critical review on special forming processes and associated research for lightweight components based on sheet and tube materials

Liu

Cai

et al. 2014

Manufacturing Rev.

View full text Add to dashboard Cite

-Lightweight materials, such as ultra-high strength steel, titanium alloys and aluminum alloys, are used widely in aerospace and automobile industries leading to increasing demands for advanced forming technologies. Recently many innovative sheet-and tube-forming methods have been proposed by researchers and R&D facilities around the word. These methods can greatly improve the formability of materials with low plasticity and can produce complex-shaped parts with good surface qualities. This review aims at providing an insight into the latest developments of particular sheet-or tubular-metal forming process and shows basic applications in modern industry.

show abstract

“…[3][4][5] For cowl cross bars, however, considering the noise, vibration and harshness (NVH) characteristics required by complete car makers, the thickness of a large-diameter section in the driver's side should be larger than that of the small-diameter section in the passenger's side. Consequently, the hydroforming technique which has fundamental characteristics of tube expansion is not sufficient to meet the thickness constraint of the current NVH requirements.…”

Section: Introductionmentioning

confidence: 99%

Development of combined tube drawing process for straight-type cowl cross bar of automobile

Kim

Youn

Rhee

2014

Int. J. Precis. Eng. Manuf.

View full text Add to dashboard Cite

The cowl cross bar of an automobile is a frame component that is installed inside the cockpit module to provide a guide surface, to which functional components for electricity and air conditioning are attached. In the recent years, the geometries of cowl cross bars are getting more complex in order to meet the demands of a wide variety of embedded functional components and the reduced weight of frame parts with enhanced mechanical and noise/vibration characteristics. This paper seeks to develop an one-piece forming process which eliminates welding process for an automotive cowl cross bar in order to increase production efficiency and enhance the mechanical characteristics by applying the tube drawing process. However, it was predicted that a conventional tube drawing process cannot be applied to the current part since the area reduction ratio of the drawing reaches 51.7% which exceeds the general limiting value. In this study, therefore, a combined drawing process which adds a compressive force to a tensile force of the conventional drawing process was proposed and 2-stage drawing process sequence was designed by using CAE analyses. In addition, drawing experiments were carried out by using the manufactured combined drawing machine in order to verify the designed process.

show abstract

Hydroforming applications in automotive: a review

Cited by 39 publications

References 1 publication

Forming limit diagram of tubular hydroformed parts considering the through-thickness compressive normal stress

Forming limit diagram of tubular hydroformed parts considering the through-thickness compressive normal stress

A critical review on special forming processes and associated research for lightweight components based on sheet and tube materials

Development of combined tube drawing process for straight-type cowl cross bar of automobile

Contact Info

Product

Resources

About