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Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500051
EISBN: 978-1-62708-317-1
..., progressive die sequencing, blank holder force optimization, sheet hydroforming, hot stamping, and springback and bending of advanced high-strength steels. It also discusses the factors that affect the accuracy of finite element simulations such as springback, thickness variations, and nonisothermal effects...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500019
EISBN: 978-1-62708-317-1
...Abstract Abstract This chapter begins with a review of the mechanics of bending and the primary elements of a bending system. It examines stress-strain distributions defined by elementary bending theory and explains how to predict stress, strain, bending moment, and springback under various...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500107
EISBN: 978-1-62708-317-1
... the cause of springback and explains how to predict and compensating for its effects. advanced high-strength steel automotive sheet steels bending flanging flow stress springback stretching INCREASED REQUIREMENTS for vehicle safety and weight reduction in automotive design led...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500133
EISBN: 978-1-62708-317-1
...Abstract Abstract Hot stamping is a forming process for ultrahigh-strength steels (UHSS) that maximizes formability while minimizing springback. This chapter covers several aspects of hot stamping, including the methods used, the effect of process variables, and the role of finite-element...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480243
EISBN: 978-1-62708-318-8
... (a) inboard and (b) outboard wrap techniques. Fig. 11.2 Springback in Ti-6Al-4V alloy as a function of radius-to-material-thickness ratio. R.T., room temperature Fig. 11.5 Forming temperatures for dimpling, linear stretch, sheet stretch, and rubber stretch flange forming Fig. 11.6...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ahsssta.t53700177
EISBN: 978-1-62708-279-2
... Fig. 12.4 U-channel profiles before (blue) and after (red) springback Fig. 12.5 Elastic recovery (springback) in steel. Source: Ref 12.2 Fig. 12.6 Effect of yield strength on springback in steel. Source: Ref 12.2 Fig. 12.7 Tooling used for the springback U-channel...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ahsssta.t53700225
EISBN: 978-1-62708-279-2
... Multipoint active binder. Photo courtesy of Muller-Weingarten Fig. 15.11 Effect of binder force trajectory on springback of DP 590 steel. Source: Ref 15.7 Fig. 15.13 Rigid binder with nitrogen cylinders. Courtesy of TDM/Ford Motor Co. Fig. 15.14 Schematic of a flexible binder...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.tt2.t51060101
EISBN: 978-1-62708-355-3
... 11 , 1981 , p 505 – 521 10.1146/annurev.ms.11.080181.002445 17. Datsko J. , Materials in Design and Manufacturing , J. Datsko Consultants , 1977 , p 7 – 16 18. Kuhn N. , On the Springback Behavior of Low-Carbon Steel Sheet After Stretch Bending, J. Austral. Inst...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500273
EISBN: 978-1-62708-317-1
..., and springback. If the part contains features with small radii, a forming tool with a matching radius must be used. The tools are made of tool steel, stellite, or plastic. Typically, rotating tools are used with milling machines, whereas other machines, such as single-purpose AMINO machines, use rigid tools...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500211
EISBN: 978-1-62708-317-1
... significantly. Research on three-dimensional (flexible) roll forming is still in its beginnings. When designing a traditional roll forming machine, it is necessary to know the number of forming steps, the tool design, and the springback. Furthermore, it is equally important to know the limitations of radius...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ahsssta.t53700215
EISBN: 978-1-62708-279-2
... are characterized by high strength and somewhat low ductility. Such properties lead to increased tendencies for splitting, buckling, residual stresses, and springback. Forming AHSS require higher tonnages and this leads to higher loads on dies and tools, resulting in die wear and tool failure. In general, AHSS...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120033
EISBN: 978-1-62708-269-3
... transus minus 28 °C (50 °F) for alpha/beta forgings and beta transus plus 42 °C (75 °F) are recommended. Superplastic isothermal die forging may be accomplished at temperatures that differ from these recommendations. Heating titanium alloys increases form-ability, reduces springback, takes advantage...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400161
EISBN: 978-1-62708-316-4
... and reduced scrap rate Reduce impact speed and noise Improve edge quality in blanking and shearing and increase tool life Reduce springback and improve part dimensions by controlling the dwell time at the BDC (bottom dead center) of the slide stroke Allow assembly and other secondary operations...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240279
EISBN: 978-1-62708-251-8
... to 200 tons) to accommodate stock from 1 to 5 m (3 to 15 ft). Larger and smaller presses are used for specialized applications. Fig. 16.21 Bending. Source: Ref 8 Springback is the partial return of the part to its original shape after forming. The amount of springback is a function...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400001
EISBN: 978-1-62708-316-4
...; thus, elastic recovery or springback may be significant. Examples of sheet-metal forming processes are discussed in Chapter 2, “Classification and Description of Sheet Metal Forming Operations,” of this book. Some processes, known as hybrid forming processes, can fall under both sheet metal...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500227
EISBN: 978-1-62708-317-1
... and springback effects and the possibility to use inertia locking mechanisms in the tool design, allowing the use of smaller-capacity presses. Furthermore, due to the short forming time, the process can be considered to be adiabatic and the forming heat can be used more efficiently for deformation than...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2013
DOI: 10.31399/asm.tb.mfub.t53740163
EISBN: 978-1-62708-308-9
..., hardness would be a minimum of 90 HRB. Source: Ref 11 Fig. 13 Springback forces in bending. Source: Ref 7 Fig. 19 Typical setup for press-brake forming in a die with a vertical opening. R , punch radius; s , span width; r , die radius; t , metal thickness. Source: Ref 12...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.9781627083164
EISBN: 978-1-62708-316-4
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500179
EISBN: 978-1-62708-317-1
... structural strength and stiffness via optimized section geometry Lower tooling costs due to fewer parts Fewer secondary operations (less welding and punching of holes during hydroforming) Tighter tolerances and reduced springback, both of which facilitate assembly Reduced scrap, because trimming...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400053
EISBN: 978-1-62708-316-4
... deformations. In metal forming, elastic strains are smaller by several orders of magnitude than plastic strains. Yet, in case of sheet metal forming, they are still very significant since they are the reason for the springback. 5.1 General State of Stress A typical sheet forming process, deep drawing...