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impression-die forging

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Published: 01 January 2005
Fig. 10 Close-tolerance forging that illustrates tilting of the die impression to forge ribs as oblique webs. Dimensions given in inches More
Image
Published: 01 January 2005
Fig. 2 Typical multiple-impression dies for closed-die forging. See text for discussion. More
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
... on the factors that affect die life and safety precautions to be considered during die construction. cast dies die inserts fabrication hammers hardenability heat treatment horizontal forging machines hot forging hot-work tool steels impression dies mechanical fatigue plastic deformation...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003183
EISBN: 978-1-62708-199-3
...-restricted machines. Some of these machines can be used for many forging processes, such as open-die forging and impression-die (or closed-die) forging. Others are restricted to specific processes. Hammers Forging processes using hammers are the most versatile and the least expensive of all...
Image
Published: 01 January 2005
Fig. 6 Typical procedure for forging a ringlike part from an austenitic stainless steel. Dimensions given in inches Sequence of operations 1—Upset on flat portion of die to approximately 115 mm (4 1 2 in.) in diameter. 2—Forge in blocker impression. 3—Forge in finisher More
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: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003981
EISBN: 978-1-62708-185-6
... roll forging dies with progressive shape changes. The roll dies act like a roll as well as a forging die. Forging rolls are available in numerous sizes and have the capacity to roll blanks up to 200 mm (8 in.) thick and 1920 mm (75 in.) long. The roll dies usually have multiple progressive impressions...
Image
Published: 01 January 2005
Fig. 14 Built-in die mismatch to compensate for ram deflection. (a) Arrangement of die impression for forging pairs of connecting rods. (b) Upper and lower dies with mismatch built into the blocker impression More
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...
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: 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.a0003994
EISBN: 978-1-62708-185-6
... in the structure Niobium and Niobium Alloys Niobium and its alloys, notably, Nb-1Zr and Nb-10Hf-1Ti, can be forged directly from the as-cast ingot. Most impression-die forging experience, however, has been with unalloyed niobium. Unalloyed niobium and Nb-1Zr can be cold worked or warmed slightly...
Image
Published: 01 January 2005
Fig. 15 Flap hinge forged in dies designed to provide uniform flash around the forging and to shift flash impression from upper to lower die. Dimensions given in inches More
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: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003986
EISBN: 978-1-62708-185-6
... life. These grades of die steel are usually much harder than those commonly used for forging and as a result have historically been heat treated after machining the impression. The heat treatment process imposes some dimensional variability (distortion) in the impression. Until recently...
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
..., 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 commonly used; open...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006835
EISBN: 978-1-62708-329-4
... from a cast ingot. Impression die forgings are usually smaller and are produced from billets or bar stock that were in turn produced from cast ingots. Thus, flaws produced in the casting and conversion processes can be carried through to forgings. In addition, flaws can be introduced while making...
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
... In a power-drop hammer, the ram is accelerated during the downstroke by air, steam, or hydraulic pressure. The components of a steam- or air-actuated power-drop hammer are shown in Fig. 3 . This equipment is used almost exclusively for closed-die (impression-die) forging. Fig. 3 Principal components...
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: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003997
EISBN: 978-1-62708-185-6
... more expensive than sand castings, their cost can be justified in light of their soundness and generally better properties. An overview of forging tolerances is given in Table 1 . Tolerances in closed-die forgings can be as close as ±0.25 mm (±0.01 in.), sometimes closer, for small- to medium...