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press brakes
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Published: 01 August 2012
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Published: 01 August 2012
Image
Published: 01 August 2012
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Published: 01 November 2013
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
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Image
Published: 01 November 2013
Image
Published: 01 November 2013
Fig. 21 Dies and punches most commonly used in press-brake forming. (a) 90° V-bending. (b) Offset bending. (c) Radiused 90° bending. (d) Acute-angle bending. (e) Flattening, for three types of hems. (f) Combination bending and flattening. (g) Gooseneck punch for multiple bends. (h) Special
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Image
Published: 01 October 2012
Fig. 2.16 Typical setup for press brake forming in a die with a vertical opening. R , punch radius; r , die radius; s , span width; t , metal thickness. Source: Ref 2.15
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Image
Published: 01 October 2012
Fig. 4.9 Minimum bending limits for press-brake versus slower (hydraulic) bending of beryllium sheet in transverse and longitudinal directions. r , bend radius; t , sheet thickness. Source: Ref 4.4
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Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500019
EISBN: 978-1-62708-317-1
... the design and operation of press brakes and other bending machines. bending contour flanging hemming hole flanging press brakes BENDING, FLANGING, AND HEMMING are widely used in sheet metal fabrication where the parts require simple or complex bent profiles ( Fig. 2.1 ). Bending is usually...
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 bending conditions. It describes the basic principles of air bending, stretch bending, and U- and V-die bending as well as rotary, roll, and wipe die bending, also known as straight flanging. It also discusses the steps involved in contour (stretch or shrink) flanging, hole flanging, and hemming and describes the design and operation of press brakes and other bending machines.
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
... Abstract This chapter describes sheet metal forming operations, including cutting, blanking, piercing, and bending as well as deep drawing, spinning, press-brake and stretch forming, fluid forming, and drop hammer and electromagnetic forming. It also discusses the selection and use of die...
Abstract
This chapter describes sheet metal forming operations, including cutting, blanking, piercing, and bending as well as deep drawing, spinning, press-brake and stretch forming, fluid forming, and drop hammer and electromagnetic forming. It also discusses the selection and use of die materials and lubricants along with superplastic forming techniques.
Image
Published: 01 March 2002
Fig. 6.17 Effect of forming direction relative to rolling direction on formability of Rene 41 nickel-base superalloy sheet in press-brake bending. Sheet thickness 0.02 to 0.187 in. (0.5 to 4.75 mm)
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Image
Published: 01 December 2004
Fig. 6.1 Hot isostatically pressed cast aluminum brake caliper. Development of lower-cost HIP process alternatives since the 1990s is expanding its potential use into a broad range of applications, including aluminum automotive castings such as steering knuckles, brake calipers (pictured
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in Presses and Hammers for Cold and Hot Forging
> Cold and Hot Forging: Fundamentals and Applications
Published: 01 February 2005
Fig. 11.8 Schematic of a mechanical press with eccentric drive (clutch and brake on eccentric shaft). [ Altan et al., 1973 ]
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in Presses and Hammers for Cold and Hot Forging
> Cold and Hot Forging: Fundamentals and Applications
Published: 01 February 2005
Fig. 11.9 Schematic of a crank press with pinion-gear drive (clutch and brake are on pinion shaft; for large capacities this design is more stable and provides high flywheel energy). [ Altan et al., 1983 ]
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Book Chapter
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400233
EISBN: 978-1-62708-316-4
...- nal for stopping the action of a press, usually after a complete cycle, by disengaging the clutch mechanism and engaging the brake mechanism. axisymmetric drawing The drawing of shapes having an axis of symmetry such as cones and round cups B back-off See relief. back-ups (1) Perishable details made...
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.smff.t53400005
EISBN: 978-1-62708-316-4
... is forced to yield and bend over the edge of the die. Equipment: mechanical press brakes, hydraulic press brakes Materials: carbon and alloy steels; aluminum alloys; titanium alloys; iron-, nickel-, and cobalt-base superalloys; molybdenum alloys; beryllium; tungsten Process Variations...
Abstract
This chapter provides a concise, design-oriented summary of more than 30 sheet forming processes within the categories of bending and flanging, stretch forming, deep drawing, blank preparation, and incremental and hybrid forming. Each summary includes a description and diagram of the process and a bullet-point list identifying relevant equipment, materials, variations, and applications. The chapter also discusses critical process variables, interactions, and components and the classification of sheet metal parts based on geometry.
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400145
EISBN: 978-1-62708-316-4
... The main components of a press were described in Chapter 9, “Principles of Sheet Forming Presses,” in this book. The main difference between a hydraulic and mechanical press is the drive mechanism (see Fig. 9.2 ). A mechanical press drive consists of an electric motor, a flywheel, a clutch/brake...
Abstract
The load-displacement capabilities of a mechanical press are determined largely by the design of its drive mechanism or, more precisely, the linkage through which the drive motor connects to the slide. This chapter discusses the primary types of linkages used and their effect on force, velocity, and stroke profiles. It begins by describing the simplest drive configuration, a crankshaft that connects directly to the slide, and a variation of it that uses eccentric gears to alter the stroke profile. It then discusses the effect of adding a fixed link, knuckle joint, or toggle to the slider-crank mechanism and how gear ratios, component arrangements, and other design parameters affect slide motion. The chapter also explains how to assess load and energy requirements, time-dependent characteristics, and dimensional accuracy and discusses overload protection, shutheight adjustment, and slide counterbalancing as well.
Book Chapter
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550193
EISBN: 978-1-62708-307-2
... grade (d) L 370 53 266 38 2.3 T 390 56 273 39 2.6 Thermal or brake grade L 294 42 196 28 2.7 T 322 46 496 28 4.6 High-purity (isostatically pressed) L 455 65 287 41 3.9 T 455 65 287 41 4.4 High-oxide instrument grade (hot pressed) L 476 68 406 58...
Abstract
Beryllium is an extraordinary metal with an unusual combination of physical and mechanical properties. It has low density, high stiffness, and excellent dimensional stability. It is also transparent to x-rays and can be machined to extremely close tolerances. This chapter discusses the properties, compositions, and processing characteristics of beryllium and its alloys. It provides information on powder production and consolidation, commercial designations and grades, wrought products, and forming processes. It also discusses the issue of corrosion, the use of protective treatments and coatings, and health and safety concerns.
Book Chapter
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480243
EISBN: 978-1-62708-318-8
..., including brake forming, stretch forming, deep drawing, and spin forming as well as roll forming, drop-hammer forming, tube bulging and bending, and superplastic forming. It also discusses dimpling and joggling and the use of hot sizing to correct springback. forming lubricants titanium alloys...
Abstract
This chapter describes the equipment and processes used to form titanium alloy parts. It discusses the advantages and disadvantages of hot and cold forming, the factors that influence formability, and the effect of forming temperature and lubricants. It describes common processes, including brake forming, stretch forming, deep drawing, and spin forming as well as roll forming, drop-hammer forming, tube bulging and bending, and superplastic forming. It also discusses dimpling and joggling and the use of hot sizing to correct springback.