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pointed punch piercing

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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
... Abstract This article begins with a discussion on the fundamentals of cutting. It focuses on blanking and piercing operations in a press tool to form and shape the final part geometry. The types of piercing operations include conventional piercing, piercing with a pointed punch, piece...
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
... is used in this article, and in related articles in this Volume, to denote the production of a hole by removing a slug of metal with a punch and die. However, some prefer the terms punching or perforating , limiting the term piercing to the use of a pointed punch that tears and extrudes a hole...
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
..., clinching, self-pierce riveting, and their combinations with other processes. Riveting A rivet is a metallic pin with a head, used for joining together plates or pieces of materials by passing it through them and then beating or pressing down the point so that it shall spread out and form a second...
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005108
EISBN: 978-1-62708-186-3
...-strength steel, such as high-carbon steel, the most important difference between the blanking and piercing of high-carbon and of low-carbon steel is that greater clearance between punch and die is required for high-carbon steels. Table 1 gives clearances needed for producing different edge types ( Fig. 1...
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...
Book Chapter

Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005160
EISBN: 978-1-62708-186-3
... prior to piercing of nearby holes. Fig. 2 Strip development for a ring-shaped part (two at a time). Note idle stage for die strength, layout of strip for material economy. Fig. 3 Basic blank shapes Fig. 4 Single-row blank layouts (shaded areas represent punches) Fig...
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005104
EISBN: 978-1-62708-186-3
... is observed. Elastic springback of the workpiece material increases the pressure acting on the punch during retraction and thus increases flank wear, particularly in piercing of a hole. High production rates contribute to a temperature increase. In punching of stainless steel, the temperature rise...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003177
EISBN: 978-1-62708-199-3
... the fastest and most economical way to make flat parts, particularly in large quantities. Piercing Also called punching or perforating, piercing (with a flat-end punch), is similar to blanking except that the punched-out (blanked) slug is the waste and the surrounding metal is the workpiece. (See...
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005116
EISBN: 978-1-62708-186-3
... in material. piercing. Penetration of material using a sharp-pointed punch, leaving a jagged hole similar to a bullet hole. extruding. Forming of a flange around a hole in sheet metal. blanking. Cutting or shearing of material to a predetermined contour from sheet or strip stock...
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005162
EISBN: 978-1-62708-186-3
..., and piercing (for example, see the articles “Blanking of Low-Carbon Steel” and “Piercing of Low-Carbon Steel” in this Volume). The choice of forming method depends on the desired size, configuration, and production quantities of a part. For example, press forming (where a punch presses the workpiece...
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005180
EISBN: 978-1-62708-186-3
... component of the multiple-slide machine is the piercing head. Die sets for piercing, cutting, trimming, blanking, or embossing are mounted in this head. The die components are mounted on edge on a solid backup plate. The punch plate retains the punch components and is mounted on a slide driven by cams...
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
.... It is the maximum portion of the stroke that can be used for forging. Die layout, particularly in applications involving long upsets or deep piercing operations, should be checked to determine the position of all punches in relation to the work at the start of the stock gather in each pass. Occasionally...
Book Chapter

Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005118
EISBN: 978-1-62708-186-3
.... The part is usually supported open side down on a solid pad mounted on the lower shoe; this pad is very similar to the type used on a solid forming die. There is usually a spring-loaded pad fastened to the punch. This pad holds the part firmly in position on the downstroke of the press. The upper cutting...
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
... to provide a pancake, which, in turn, is pierced and punched out in preparation for additional forging operations. At this point, alternative methods of finish forging can be employed, for example, saddle forging the pierced, punched-out pancake to a size that is suitable for closed-die forging, or ring...
Book Chapter

Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005177
EISBN: 978-1-62708-186-3
... is encountered. Piercing and Notching Press brakes are extensively used for piercing (punching) and notching. A press brake is more practical than a punch press for the piercing or notching of long, narrow workpieces, such as flats, channels, or other cross-sectional shapes. Press brakes are especially...
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
... forming. Blanking and Piercing Blanking and piercing of aluminum alloy flat stock are ordinarily done in punch presses because of their high production rates and ability to maintain close tolerances. Press brakes are sometimes used, particularly for experimental or short-run production...
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005139
EISBN: 978-1-62708-186-3
...-shaped. The difference in contour of the two ends kept the pieces from stacking. Before forming, the blank was 9.5 mm (0.374 in.) wide. The piece was pierced with 68 holes, each 0.31 mm (0.012 in.) square. In this operation, the material was displaced by a pointed punch, rather than removed by a flat...
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
.... Air jets are used where possible to eject the pierced slugs from the die. The forming of lanced detents and flanged holes toward the punch side of the blank can be done by actuating the punches with cams on the rear camshaft. Additional movements of die units can be obtained from any of the three...
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005101
EISBN: 978-1-62708-186-3
... or shafts. Hole Flanging Holes can be flanged, or collared, to strengthen them and to provide an area for threading, if required. Collaring is accomplished by hole punching and expansion or by piercing and expansion, as shown in Fig. 2(b) and (c) . In punching and expansion, a double action punch...
Book Chapter

Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004031
EISBN: 978-1-62708-185-6
...- blows on the workpiece at a midway point. cupping. (1) The rst step in deep drawing. (2) nally within the die opening. As the punch Action is vertical or horizontal. Fracture of severely worked rods or wire in forms the cup, the amount of material in the counterblow hammer. A forging hammer in which...