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punch assembly

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Book Chapter

Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005117
EISBN: 978-1-62708-186-3
...-and-extrude operations, slotting, countersinking, and cutting and lancing of tabs. The article provides information on the punch assembly, the die assembly, and the stripper and discusses the factors considered during piercing operations. It reviews the applications of the four types of blanks used in sheet...
Book Chapter

Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005114
EISBN: 978-1-62708-186-3
... shank A DIE ASSEMBLY is a complete punch-press tool that is used to produce large numbers of interchangeable stamped parts. It consists of mating pairs of punches and dies, their retention plates, a stripping device, and a subassembly called a die set. When the press is actuated, the mating...
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0009154
EISBN: 978-1-62708-186-3
... head, a pin, or bolt headed or clinched at both ends. The process in which this technique is implemented is called riveting ( Ref 1 ). Two main types of riveting processes are punch riveting and self-pierce riveting. Punch Riveting Figure 1 shows the riveting process in four steps. First...
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005109
EISBN: 978-1-62708-186-3
.... Turret movement can also be controlled semiautomatically or automatically on numerical control or computer numerical control (CNC) punch presses. A closed-loop direct or alternating current drive connected to both the upper and lower turret assemblies provides the automatic turret with either...
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005165
EISBN: 978-1-62708-186-3
... provides support and motion for the punch holder. Cutoff Unit The cutoff unit, placed between the press and the front forming slide, is used for cutting work metal into blanks before they are bent to shape. The ends can be cut off straight, or the cut can be curved. Various types of cutoff units...
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005178
EISBN: 978-1-62708-186-3
...Abstract Abstract This article discusses the most important factors required for cutoff methods. It explains the operations of machines used for the punching, shearing, notching, or coping of plates, bars, and structural sections. The article describes the effects of the blade angle and speed...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004005
EISBN: 978-1-62708-185-6
... the punch and die. The closing-in of the die bore when the die is assembled in shrink rings should be considered when designing this diameter. Fig. 6 Backward extrusion punch. A, nose angle; B, punch land; C, corner radius; D, relief angle Die Design The high forming pressure in cold...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006034
EISBN: 978-1-62708-175-7
..., including punches, core rods, and punch clamp rings. core rods hydraulic press mechanical press powder metallurgy powder-fill ratio punch clamp rings punches rigid tooling compaction tooling POWDER METAL COMPACTING PRESSES, equipped with appropriate tooling, frequently are used...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004040
EISBN: 978-1-62708-185-6
... as receptacles, for mating members in assembly, serving as locations for fasteners or bearing surfaces, and contributing to a reduction in weight. Functions, as they relate to specific forging designs, are described in examples presented in this article. During the forging of a cavity, metal in the workpiece...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006080
EISBN: 978-1-62708-175-7
... the tooling configuration in Fig. 7 . This part is axisymmetric, consisting of an outer rim (upper section) formed by the upper punch, and a hub (lower section) formed by the lower punch. A flange is formed between both punches, and an outer die and core rod complete the tool set. A preform containing...
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005119
EISBN: 978-1-62708-186-3
... Composition and Condition on Blanking and Piercing” in this article). Presses A general-purpose punch press in good mechanical condition is acceptable for stamping laminations, but large-volume production of laminations by progressive-die methods requires the use of high-productivity presses (see...
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005134
EISBN: 978-1-62708-186-3
.... Stretch bending imparts elongation throughout the bend and thus minimizes springback. Ram-and-Press Bending With this method, a workpiece is placed between two supports, and a rounded form die (ram or punch) is pressed against it ( Fig. 7 The two supports pivot as the ram moves forward...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005527
EISBN: 978-1-62708-197-9
... a least three or five domains in which cost estimates apply (i.e., sheet metal assembly, injection-molded plastic parts, formed sheet metal parts, etc.). More complex products, such as an aircraft jet engine with 25,000 unique parts, might have 200 different manufacturing processes, each of which defines...
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002483
EISBN: 978-1-62708-194-8
... if they are only moderately complex, like a dishwasher with 200 unique parts, have a least three or five domains in which cost estimates apply (i.e., sheet metal assembly, injection-molded plastic parts, formed sheet metal parts, etc.). More complex products, such as an aircraft jet engine with 25,000 unique parts...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001057
EISBN: 978-1-62708-162-7
... and more precise dimensional accuracy. Forgings are also available as rolled or mandrel-forged rings. Impacts Impacts are formed in a confining die from a lubricated slug, usually cold, by a single-stroke application of force through a metal punch causing the metal to flow around the punch...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005531
EISBN: 978-1-62708-197-9
... and Sinter Powder Compaction Powder compaction is the most widely used powder shapemaking process. The process involves compression of a powder mass confined in a die cavity and acted upon by upper and lower punches, as shown in Fig. 3 . First, powder flows into the die cavity from a feed shoe...
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.a0005141
EISBN: 978-1-62708-186-3
.... The Olsen cup test measures the maximum penetration of a 22 mm (0.875 in.) diameter hemispherical punch into a clamped flat blank (see the section “Stretching Tests” in the article “Formability Testing of Sheet Metals” in this Volume). The punch depth at failure is the Olsen cup value. The test has been...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005539
EISBN: 978-1-62708-197-9
... are presented in the order they would be used in a typical manufacturing process sequence: primary materials processing, hot forging and cold forming, and product assembly. The article discusses four FEM modules: the deformation model, the heat-transfer model, the microstructural model, and the carbon diffusion...
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
... forming process) 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...