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piercing dies

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Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003183
EISBN: 978-1-62708-199-3
... Abstract Forging machines use a wide variety of hammers, presses, and dies to produce products with the desired shape, size, and geometry. This article discusses the major types of hammers (gravity-drop, power-drop, high speed, and open-die forging), and presses (mechanical, hydraulic, screw...
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
.... Horizontal forging machines (upsetters) are able to upset, pierce, split, bend, and extrude simple or intricate shapes. The workpiece is gripped in the cavities or passes in the die halves, and the heading tool forces the heated material into the die cavity. Figure 3 illustrates typical three-pass dies...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003177
EISBN: 978-1-62708-199-3
... dies have a straight, vertical wear land between the top of the die and the relief. Fig. 9 Relief in a blanking die PIERCING is the process of cutting holes in sheet metal, generally by removing a slug of metal, with a punch and die. Piercing is similar to blanking, except that in...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003181
EISBN: 978-1-62708-199-3
.... Most aluminum alloys require smaller clearances between punches and dies in blanking and piercing than do steels. For drawing operations, similar tool radii but larger clearances are required, with respect to steel, to allow for the free flow of the metal and to avoid excessive stretching during...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003132
EISBN: 978-1-62708-199-3
... Abstract This article discusses the applications and tensile properties of selected copper tube alloys, as well as the methods for producing copper tubular products, namely extrusion and rotary piercing. It explains the methods available for the finishing of copper tubular products, such as...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003980
EISBN: 978-1-62708-185-6
... complete the upset, and if flash removal (trimming) is a part of the forging operation, another pass is added. Piercing and shearing passes can also be incorporated into the dies. In single-blow solid-die machines, the gripper dies are replaced by a shear arm and a shear blade. A long, heated bar of...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004021
EISBN: 978-1-62708-185-6
...) process sequence: primary materials processing, hot forging and cold forming, and product assembly. The article discusses the material fracture and dies stress analysis and presents the optimization techniques used in 2-D and 3-D preform die design. bulk forming cold forming finite element method...
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
... for flash at the parting line; hence, the term seamless . In a typical sequence, a forging slug is placed in the die impressions, the dies are closed and held shut by external pressure, and forging proceeds by means of piercing or extruding with a plug ram. The plug ram enters through an opening at...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004004
EISBN: 978-1-62708-185-6
... size, machining, descaling, cutting to length, and lubricating. It lists the advantages of the cold heading over machining. Materials selection criteria for dies and punches in cold heading are also described. The article provides examples that demonstrate tolerance capabilities and show dimensional...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004006
EISBN: 978-1-62708-185-6
... extrusion velocity, amount of pressure required, and type of lubricant, for successful and efficient hot extrusion. The article concludes with a discussion on applications and design methodology that provides insight into CAD/CAM of extrusion dies. computer-aided design  direct extrusion extruded...
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
... it is preceded by other operations such as blanking, drawing, piercing, and bending. Coining is often the final operation in a progressive-die sequence, although blanking or trimming, or both, frequently follow coining. Development of Detail in the Workpiece . In coining dies, the prepared blank...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003180
EISBN: 978-1-62708-199-3
... also discussed. formability forming forming methods forming tools heat-resistant alloys lubrication refractory metals stainless steel STAINLESS STEELS are blanked, pierced, formed, and drawn in basically the same press tools and machines that are used for other metals...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003991
EISBN: 978-1-62708-185-6
... cooling that occurs when the heated workpiece comes into contact with the cold dies. For this reason, equipment that has relatively short die contact times, such as hammers, is often preferred for forging intricate shapes in steel. Adequate control of metal flow to optimize properties in complex forging...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003096
EISBN: 978-1-62708-199-3
..., sheet, strip, or plate into a hollow cylinder and welding the resulting longitudinal seam together or by generating an opening in a solid cylinder by piercing and elongating the resultant hollow cylinder. The first group of products is called welded and the second group, seamless. In producing...
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
Book Chapter

By Robert Bolin
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003982
EISBN: 978-1-62708-185-6
... diameter growth). Fig. 26 Schematic showing blank preparation using open dies and a two-station press. (a) Billet centered on press table. (b) Billet upset. (c) Upset blank is indented. (d) Blank is pierced and ready for removal. With thin-wall sleeves, and even with square cross section rings...
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
Book Chapter

Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003978
EISBN: 978-1-62708-185-6
... continuous flow. Forgings are made by this process when: The forging is too large to be produced in closed dies. The required mechanical properties of the worked metal that can be developed by open-die forging cannot be obtained by other deformation processes. The quantity required is too small to...
Series: ASM Handbook
Volume: 1
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v01.9781627081610
EISBN: 978-1-62708-161-0
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
... the exterior configuration of the forged workpiece. The “parting line” (symbol ) is the projected line around the periphery of a forging that is defined by the adjacent and mating faces of the forging dies when the dies are closed. Thus, the concept of parting line is applicable only to forgings...