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wrinkling

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Published: 01 January 2000
Fig. 6 Examples of common paint defects. (a) Sags. (b) Orange peel. (c) Wrinkling. (d) Checking. (e) Cracking. (f) Mudcracking. Table 2 provides a general description of these defects as well as their causes and remedies. Courtesy of J. Lederer, Department of the Navy, Port Hueneme, CA More
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Published: 01 August 2012
Fig. 2.36 Defects in contour flanging. (a) Wrinkling in shrink flanging. (b) Fracture in stretch flanging More
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Published: 01 August 2012
Fig. 8.31 The wrinkling amplitude measurements on three cups formed to 32-mm depth under a blank holder force of 30 tons. Source: Ref 8.18 More
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Published: 01 August 2012
Fig. 8.32 The wrinkling and fracture limits for rectangular cups deep-drawn from different blank shapes. Source: Ref 8.18 More
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Published: 01 August 2012
Fig. 8.33 Deformed cup geometry with severe wrinkling predicted by finite element analysis simulation using a blank holder force of 2 tons. Source: Ref 8.18 More
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Published: 01 August 2012
Fig. 12.36 Failure modes in shear spinning. (a) Wrinkling. (b) Flaring. (c) Sufficient part. Source: Ref 12.26 More
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Published: 01 November 2013
Fig. 16 Flat-bottomed pan stamped from 2008-T4 aluminum sheet showing wrinkling on the flange. Source: Ref 10 More
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Published: 01 November 2013
Fig. 17 Blank-holder force versus punch travel, with wrinkling and fracture limits for three blank geometries. Source: Ref 10 More
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Published: 01 November 2010
Fig. 7.4 Montage of ply wrinkling in a composite material developed during manufacturing. Bright-field illumination, 5├Ś objective More
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Published: 01 August 2012
Fig. 8.26 Wrinkles that may occur in deep drawing rectangular cups when blank holder force is too low: (a) flange wrinkles, (b) side wall wrinkles More
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Published: 01 August 2012
Fig. 15.19 Wrinkle-detection sensor. Source: Ref 15.2 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500301
EISBN: 978-1-62708-317-1
..., how acoustic emission, ultrasonic, and eddy current sensors detect tool breakage and part defects such as cracks, and how roller ball and optical sensors measure material flow. It also discusses the role of draw-in, wrinkle, oil-monitoring, and vision sensors and explains how material properties can...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400203
EISBN: 978-1-62708-316-4
... Abstract This chapter describes the various types of cushion systems used in forming presses and their effect on part quality. It begins with a review of the deep drawing process, explaining that wrinkling, tearing, and fracture are the result of excess or insufficient material flow, which can...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400105
EISBN: 978-1-62708-316-4
... opening with a punch to draw the metal into the desired shape without causing wrinkles or splits in the drawn part. The term deep drawing implies that some drawing in of the flange metal occurs and that the formed parts are deeper than could be obtained by simply stretching the metal over a die ( Ref...
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Published: 01 October 2011
Fig. 2.15 Line dislocation movement. The top illustrates the analogy of moving a rug with progression of a wrinkle. Source: Ref 2.2 More
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Published: 31 December 2020
Fig. 9 Line dislocation movement. The top illustrates the analogy of moving a rug with progression of a wrinkle. Source: Ref 1 More
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Published: 01 August 2012
Fig. 2.43 The most common hemming defects. (a) Creep/grow. (b) Recoil. (c) Warp. (d) Wind. (e) Hem-out. (f) Wrinkling and splitting. Source: Ref 2.30 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500179
EISBN: 978-1-62708-317-1
..., buckling and wrinkling may occur at the intrados, and high thinning and flattening may occur at the extrados. The tendency for buckling to occur is more severe for thin-walled tubing and smaller bend radii. Most of the surface defects are caused by markings left by the clamping dies or insufficient...
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Published: 01 August 2012
Fig. 8.23 Results of research study in sheet hydroforming with punch. (a) Pot pressure curve and optimum blank holder force (BHF) curve predicted using numerical optimization techniques coupled with finite-element modeling. (b) Wrinkles in the round cup were eliminated by using optimum BHF. More
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Published: 01 August 2012
Fig. 5.34 Possible defects and successfully drawn cups in warm deep drawing. (a) Fracture due to insufficient flange temperature and/or excessive blank holder force. (b) Wrinkling due to low blank holder force. (c) Fracture due to insufficient punch cooling. (d) Cold deep drawing: limiting More