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screw-driven machines

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Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003983
EISBN: 978-1-62708-185-6
... workpiece into the die, holding it during swaging, and ejecting it. These tools range from simple hand tools to elaborate power-driven mechanisms. Some of the common types of auxiliary tools are illustrated in Fig. 8 , Fig. 9 , Fig. 10 , and their uses are described below. Fig. 8 Three types of...
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
... presses have been built with 600 mm (24 in.) diameter screws, or 37.3 MN (4190 tonf) of nominal force capacity. Hydraulically driven screw presses with hard-on-hand blow capacities up to 310 MN (35,000 tonf) have been built. Press speed, in terms of the number of strokes per minute, depends largely on...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003974
EISBN: 978-1-62708-185-6
... Table 1 Speed-range and speed-stroke behavior of forging equipment Forging machine Speed range Speed-stroke behavior ft/s m/s Hydraulic press 0.2–1.0 (a) 0.06–0.30 (a) Mechanical press 0.2–5 0.06–1.5 Screw press 2–4 0.6–1.2 Gravity-drop hammer 12–16...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003971
EISBN: 978-1-62708-185-6
...: load-restricted machines (hydraulic presses), stroke-restricted machines (crank and eccentric, or mechanical, presses), and energy-restricted machines (hammers and screw presses). The significant characteristics of pressing-type machines comprise all machine design and performance data that are...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003183
EISBN: 978-1-62708-199-3
... diameters range from 100 to 635 mm (4 to 25 in.). These sizes translate to nominal forces of 1.4 to 35.6 MN (160 to 4000 tonf). Direct electric-drive screw presses have been built with 600 mm (24 in.) diameter screws, or 37.3 MN (4190 tonf) of nominal force capacity. Hydraulically driven screw presses have...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003053
EISBN: 978-1-62708-200-6
... ceramic materials. These machines are purported to offer many of the advantages of a screw machine, with few of the disadvantages. Unlike a pug mill (and similar to plasticating equipment), these machines are single-screw extruders with large length/diameter ( L / D ) ratios and are designed for ceramic...
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
... ensure constant heating current. All forming elements of the machine are driven hydraulically using a pressure of about 160 bars (2240 psi). Hydraulic pressure is used for providing the power for the upsetting cylinder, movement of the receding anvil as the upset grows, and providing the clamping force...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000610
EISBN: 978-1-62708-181-8
... these steels. The austenitic stainless steel components include spring wires, preheater-reactor slurry transfer lines and gas lines of coal-liquefaction pilot plants, oil feed tubes and suction couch rolls of paper machines, cortical screws and compression hip screws of orthopedic implants, and Jewett...
Book Chapter

By H.W. Sizek
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003984
EISBN: 978-1-62708-185-6
..., adjusting screw; 6, hydraulic overload protection; 7, hammer adjustment drive shafts; 8, chuckhead; 9, centering arms; 10, clutch; 11, clutch disk Table 1 Typical sizes and capacities for mechanical radial forging machines Largest starting size for bar Smallest forge to size for bar Maximum...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005678
EISBN: 978-1-62708-198-6
..., % 5.67 4.74 The general form of a tri-pin-on-disk friction and wear measuring machine is shown in Fig. 4 . One of the test materials, usually the metal or ceramic, is machined in the form of a disk and located on pegs on a turntable driven at constant speed in an environmental chamber. Three...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003177
EISBN: 978-1-62708-199-3
... Suspension Ram Bed Open-back Gap Straight-side Arch Piller Solid Tie Rod Vertical Horizontal Inclinable Inclined Single Double Triple Crank Front-to-back crank Eccentric Toggle Screw Cam Rack and pinion Piston Over direct Geared, overdrive Under direct Geared, underdrive One...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005318
EISBN: 978-1-62708-187-0
... is not interconnected. The remnant shrinkage may also be moved to an uncritical area. This is accomplished by manipulating metal flow and die temperatures. A mechanical solution is the use of pressure or squeeze pins, which are small, hydraulically actuated cores that are driven into the freezing...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003061
EISBN: 978-1-62708-200-6
... Abstract Structural applications for advanced ceramics include mineral processing equipment, machine tools, wear components, heat exchangers, automotive products, aerospace components, and medical products. This article begins with an overview of the wear-resistant applications and the...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003015
EISBN: 978-1-62708-200-6
... extrudable into a controllable, continuous shape, the raw material must be matched to the extrusion machine. It must flow readily into the feed box and move forward in the feed section of the feed screw. In addition, it must have proper internal lubrication in order to melt uniformly and move forward...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009010
EISBN: 978-1-62708-185-6
... versatility in materials testing. Universal testing machines and tension-test frames can be used for hot-tension tests by attaching a heating system to the machine frame. The frame may impart loading by either a screwdriven mechanism or servohydraulic actuator. Screw-driven (or gear-driven) machines...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003207
EISBN: 978-1-62708-199-3
...-machine parts to stamped parts; the projection is machined or cold formed on the end of the screw-machine part. Projection welding is most successful in workpieces 0.56 to 3.18 mm (0.022 to 0.125 in.) thick. Stock 0.25 mm (0.010 in.) thick has been projection welded; projection design is critical...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003996
EISBN: 978-1-62708-185-6
... hammers, mechanical presses, screw presses, and high-energy-rate machines) to relatively slow (for example, ≤0.1 s −1 on equipment such as hydraulic presses). Therefore, deformation or strain rate is also a critical process element that must be controlled for successful forging of any given alloy and...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001228
EISBN: 978-1-62708-170-2
... requirements. Cabinet machines may be designed for manual, semiautomatic, or completely automated operation to provide single-piece, batch, or continuous-flow blast cleaning. The table-type machine ( Fig. 4 ) contains a power-driven rotating worktable. Within the cabinet, the blast stream is confined to...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005657
EISBN: 978-1-62708-198-6
... reduce surface energy). The steps formed between the cracks while they are on separate planes are the ratchet marks ( Fig. 11 ). Because ratchet marks require multiple initiation locations, they are often observed at locations of higher stress concentrations (such as the pedicle screw thread-root shown...
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
..., however, is accomplished during a relatively short portion of the stroke, so that a coining load is required only during a small portion of the press cycle. Drop hammers, and knuckle-type and eccentric-driven mechanical presses are extensively used in coining. High-speed hydraulic presses also are well...