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screw presses

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Published: 01 February 2005
Fig. 11.28 Representation of slide velocities for mechanical and screw presses in forming a thick and a thin part. V b , V e = velocity at the beginning and end of forming, respectively. [ Altan et al., 1973 ] More
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Published: 01 September 2008
Fig. 13 Steel upset forged between flat dies made on a screw press More
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Published: 01 February 2005
Fig. 11.25 Two widely used screw press drives. (a) Friction drive. (b) Direct electric drive. [ Bohringer et al., 1966 ] More
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Published: 01 February 2005
Fig. 11.27 Schematic of load-energy relationship in a screw press. [ Klaprodt, 1968 ] More
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Published: 01 February 2005
Fig. 11.29 A screw press drive that combines the characteristics of mechanical and screw presses. 1, flywheel; 2, oil-operated clutch; 3, screw; 4, ram; 5, lift-up cylinders. [ Altan, 1978 ] More
Image
Published: 01 February 2005
Fig. 11.30 Schematic of the wedge-screw press drive for hot forging More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040115
EISBN: 978-1-62708-300-3
... Abstract This chapter discusses the design and operation of forging presses and hammers. It covers the most common types of presses, including hydraulic, mechanical, and screw presses, explaining how they work and comparing and contrasting their load and displacement profiles, stroke lengths...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040107
EISBN: 978-1-62708-300-3
.... The relationships illustrated in Fig. 10.1 apply directly to hot forming of discrete parts in hydraulic, mechanical, and screw presses, which are discussed later. However, in principle, most of the same relationships apply also in other hot forming processes such as hot extrusion and hot rolling. 10.3 Load...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040059
EISBN: 978-1-62708-300-3
... in forgings produced in high-speed equipment such as mechanical press, screw press, and hammer. A part of generated heat remains in the deformed material, another part flows into the undeformed/less-deformed portion of the material where temperature is lower, while still an additional part may flow...
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Published: 01 November 2013
the die cavity is restricted. The excess material is extruded through a restrictive narrow gap and appears as flash around the forging at the die parting line. Equipment Anvil and counterblow hammers; hydraulic, mechanical, and screw presses Materials Carbon and alloy steels, aluminum alloys More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400161
EISBN: 978-1-62708-316-4
... Abstract This chapter discusses the design and operation of electromechanical servo-drive presses. It begins by comparing the operating flexibility of servo-press drives with that of their conventional counterparts. It then explains the difference between direct-drive and belt and screw-driven...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290207
EISBN: 978-1-62708-306-5
... system. The chapter then describes important structural fasteners, namely bolts, screws, pins, collar fasteners, rivets, blind fasteners, machine pins, and spring clip fasteners. The following sections describe the process involved in presses, shrink fits, hole generation, and fastener installation...
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Published: 01 August 2012
Fig. 11.4 Schematic of servo presses with high-speed/low-torque servo-motors (a) with belt and ball screw drive and (b) with ball screw and linkage drive. Source: Ref 11.9 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040007
EISBN: 978-1-62708-300-3
... and appears as flash around the forging at the die parting line. Equipment Anvil and counterblow hammers, hydraulic, mechanical, and screw presses. Materials Carbon and alloy steels, aluminum alloys, copper alloys, magnesium alloys, beryllium, stainless steels, nickel alloys, titanium...
Image
Published: 01 June 1988
Fig. 8.32 Design of metal and ceramic pins for fixing the position of a split inductor on a crankshaft journal. (a) 1-ceramic pin; 2,3-rubber packing; 4-screw; 5-threaded tube. (b) 1-nichrome pin; 2-ceramic tube; 3-rubber packing; 4-screw; 5-threaded tube. From M. G. Lozinskii, Industrial More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.9781627083003
EISBN: 978-1-62708-300-3
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400233
EISBN: 978-1-62708-316-4
... to allow the head of a screw to be flush with or below the surface. (2) A bit or drill for making a countersunk hole. crank press A mechanical press whose slides are actuated by a crankshaft. creep A term used in a hemming operation for the amount the part reduces in size along the flange radius when...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.9781627083164
EISBN: 978-1-62708-316-4
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400145
EISBN: 978-1-62708-316-4
...) set the maximum forming force, or (e) set the shutheight after stroke adjustment ( Ref 10.1 , 10.3 ). Shutheight is usually adjusted via screws and nuts, driven either manually or by electric motors. New presses have electronic sensors (encoders, as shown in Fig. 10.18 ) and controls which...
Image
Published: 01 November 2011
Fig. 8.12 Types of locknuts: (a) the upper half of a two-piece nut presses the collar of the lower half against the bolt; (b) a captive tooth washer provides locking with a spring; (c) ratchet teeth bite into a bearing surface; (d) a nylon insert flows around a bolt to lock and seal; and (e More