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impression dies

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Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003975
EISBN: 978-1-62708-185-6
..., thermal fatigue, and mechanical fatigue. The article describes heat treating practices commonly employed for chromium- and tungsten-base AISI hot-work tool steels. It discusses the fabrication of impression dies, and the advantages and disadvantages of cast dies. The article concludes with a discussion...
Book Chapter

Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004012
EISBN: 978-1-62708-185-6
...Abstract Abstract Thread rolling is a cold-forming process for producing threads or other helical or annular forms by rolling the impression of hardened steel dies into the surface of a cylindrical or conical blank. Methods that use cylindrical dies are classified as radial infeed, tangential...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003183
EISBN: 978-1-62708-199-3
... in weight from 50 lb to several tons.) An important advantage is that the striking intensity is entirely under the control of the operator or is preset by the electronic blow-control system. Consequently, auxiliary impressions in the dies can be used to preform the billet to a shape that will best fill...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004037
EISBN: 978-1-62708-185-6
... or impression dies. The parting line shown in Fig. 2(a) is straight and corresponds to the projection from the adjacent and mating die faces. If the parting line remains straight around the periphery of the forging, it will lie in a plane corresponding to that of the mating die surfaces, which is called...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.9781627081856
EISBN: 978-1-62708-185-6
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.9781627081863
EISBN: 978-1-62708-186-3
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.9781627081979
EISBN: 978-1-62708-197-9
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0009001
EISBN: 978-1-62708-186-3
... observations The novel impression technique was developed by the Ford and Mittal Steel team because direct measurements of volume or mass loss of a die over time, that is, die wear, are not presently feasible due to the large sizes of stamping dies in automotive applications. A surface replication method...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006493
EISBN: 978-1-62708-207-5
..., upsetting, roll forging, orbital (rotary) forging, spin forging, mandrel forging, and ring rolling. Open-die forgings are usually made on flat dies in hydraulic presses or hammers. Round or V-impression dies may be used to produce round or circular cross sections. Hand forging is the descriptive term most...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003981
EISBN: 978-1-62708-185-6
... must be sufficient to accommodate roll dies large enough in diameter to roll the full length of the reduced section of the workpiece. Roll Dies Shaping of the billet or plate is performed by the rolls with desired impressions of the shape machined into them. Figure 5 shows a set of segmented...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004036
EISBN: 978-1-62708-185-6
... forging dies FLASH is metal forced outward from the workpiece while it is being forged to the configuration of the closed-die impression; it is metal in excess of that required to fill the impression. In hammer and press forging, flash is received by, and contained in, a troughlike depression...
Book Chapter

Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003987
EISBN: 978-1-62708-185-6
... hot-work steels such as H13 are used at a hardness of 52 to 54 HRC for applications requiring especially high toughness. For dies containing high-relief impressions, the lowest die cost is obtained by machining the impressions directly into the dies when the die life is anticipated to outlast...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.9781627081962
EISBN: 978-1-62708-196-2
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003986
EISBN: 978-1-62708-185-6
... discharge machining to take advantage of the inherently more accurate process. Positional accuracy is largely affected by the die-sinking equipment and its ability to place an impression in a die block relative to reference surfaces. In well-made dies, the placement of the impression should be within 0.01...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004034
EISBN: 978-1-62708-185-6
... of the impression in either the upper or lower die. Impressions so tapered inward at their vertical sides contain and convert the forged metal to wedge types or taper plugs. Ideally, removal of drafted forgings from their dies is complete in the first instant of separation at the interface. Most hammer...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003997
EISBN: 978-1-62708-185-6
... flow and consequently better filling of an impression. This can usually be done at room temperature between flat dies in a hammer or a press. A rectangular slug is occasionally obtained by extruding rectangular-section bar stock and sawing slugs from it. With complex or large shapes, an impression...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003979
EISBN: 978-1-62708-185-6
... closed-die forging close-tolerance forgings conventional forgings friction hammers heating equipment lubrication presses shape complexity trimming CLOSED-DIE FORGING, or impression-die forging, is the shaping of hot metal completely within the walls or cavities of two dies that come...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006424
EISBN: 978-1-62708-192-4
... results. Most evaluations of die wear in impression dies have made use of dies of simple geometry, for example, experiments that forge disks into cups via an extrusion-type process. To keep the component and die temperatures in-line with real-world conditions, die heaters are employed, and a surface...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003976
EISBN: 978-1-62708-185-6
... for these materials are usually made from chromium hot work steels ( Table 2 ). For large dies, the die impression is made of one of these steels and inserted into a large die block of a low-alloy steel such as 6G or 6F2. As for hardness, hammer dies are only moderately hardened so that they retain a certain amount...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003973
EISBN: 978-1-62708-185-6
... is entirely under the control of the operator or is preset by the electronic blow-control system. Consequently, effective use can be made of auxiliary impressions in the dies to preform the billet to a shape that will best fill the finishing impressions in the dies and result in proper grain flow, soundness...