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gear-driven machines

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Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001232
EISBN: 978-1-62708-170-2
... performance can often be related to improvements in abrasive finishing processes and their ability to achieve closer tolerances. For example, transmission efficiency is improved when gears roll against each other with less sliding. This is made possible by grinding the gear to closer tolerances. Efficiency of...
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
... station the center is trimmed out. The part is then transferred to a ring rolling machine where the part is rolled into a ring gear. Due to the automated nature of the operation, only one operator is required to supervise the operation of the line. His time is spent performing part quality checks and...
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
... concentric forgings such as wheels and gears or coining applications in which little metal movement, but high forces, are required. All mechanical presses employ flywheel energy, which is transferred to the workpiece by a network of gears, cranks, eccentrics, or levers. Driven by an electric...
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
... primarily due to the limited supply of iron. Early mills employed flat rolls for making sheet and plate, and until the middle of the 18th century, these mills were driven by water wheels. During the Industrial Revolution at the end of the 18th century, processes were devised for making iron and steel in...
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
... under off-center stiffness. The design principle of the wedge-type press is shown in Fig. 10 in the article “Hammers and Presses for Forging” in this Volume. In this press, the load acting on the ram is supported by the wedge, which is driven by a two-point crank mechanism. Assuming the total...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001230
EISBN: 978-1-62708-170-2
... component fabrication department. A forged shaft may be cut, machined, or otherwise finished before it becomes an industrial component for use in an assembly process. After heat treatment, bearing or gear components may be ground to desired tolerances and surface quality before they are assembled into...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003183
EISBN: 978-1-62708-199-3
... such as wheels and gears or for coining applications where little metal movement but high die forces are required. The practical use of these machines has been limited and is expected to remain so. Parts that can be forged in high-energy-rate forging machines also can be forged in counterblow hammers...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003981
EISBN: 978-1-62708-185-6
... both types, the driving motor is mounted at the top of the main housing. The motor drives a large flywheel by means of V-belts. In turn, the flywheel drives the roll shafts, to which the roll dies are attached, through a system of gears. Fig. 2 Modern roll forging machine with outboard housing...
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
... produced from a bar by combined upsetting and piercing than from machining of tubing, as in the following example. Double upsetting and piercing can often be used to produce complicated shapes, such as the cluster gear discussed in the following example. Depending on the shape of the upset, a recess...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003039
EISBN: 978-1-62708-200-6
... is still performed using the mechanical gear-driven machines that evolved during the late 1950s. These machines will continue to be used because of their low cost. Polar winders with only two axes of rotation (mandrel and winding arm) still produce rocket motor cases and spherical pressure vessels in...
Book Chapter

Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003990
EISBN: 978-1-62708-185-6
... asymmetric pieces. In rotating-die machines, the upper, or tilted, die has rotational and translational motion, while the lower die has only rotational motion ( Fig. 3a ). Depending on the specific machine, both dies can be independently driven or only the lower die is power driven while the upper die (the...
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
... 17,600 12 1350 160 850 33.5 750 29.5 340 13.4 150 5.9 18 59 15 33,000 16 1800 120 Source: Equipment literature of SMS Meer GmbH In this compact design, four eccentric shafts in housings mounted on an octagonal frame are driven by a synchronizing gear, integrated into the...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003177
EISBN: 978-1-62708-199-3
.... Rocker arm drives apply crank or eccentric motion to a rocker arm connected to the press slide. In this mechanism, the linkage is driven by an eccentric gear and a connecting rod. The rocker arm drive is a variation of the knuckle lever drive. However, a press with rocker arm drive is not limited to...
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
... forgings are machined into gears, pulleys, and similar components of machinery. Spindle, pinion gear, and rotor forgings ( Examples 3 and 4 ). These forgings are for shaftlike parts and have their major or functional diameters either in the center or at one end, with one or more smaller diameters...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005252
EISBN: 978-1-62708-187-0
... a problem, because it is driven off when the sand is heated to the minimum temperature of 120 °C (250 °F) before coating. Breakage of molds or cores during molding reflects low strength. This can be caused by the use of a finer sand screen distribution without a proportionate increase in resin...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003018
EISBN: 978-1-62708-200-6
... prevention of sagging, distortion, and shifting, once the sheet has been heated. Depending on the size and sophistication of the machine, clamp frames may be pneumatically actuated or gear-driven or they may be part of a fully automated moving-belt system. Most continuous-web thermoforming machines use a...
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
... impression of the die. The shapes generally produced include a variety of enlargements of the shank or multiple enlargements of the shank and reentrant angle configurations. Transmission cluster gears, pinion blanks, shell bodies, and many other shaped parts are adapted to production by the upset machine...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003061
EISBN: 978-1-62708-200-6
... levels of manufacturing productivity and economy previously unobtainable in the machining of cast irons. In one application, milling of gray cast iron gear case housing components for oil pumps, overall cycle time was reduced by half, tool life was increased from 1 to 6 parts per edge, and average...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001305
EISBN: 978-1-62708-170-2
... and then finished by polishing with, progressively, No. 80 and No. 120 (and possibly No. 150) grit on a setup wheel driven by a portable machine. The traversing of this wheel should be kept in line with the run of the bead so that its cut lines are kept parallel with those of the original machine...
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
... normally gas-tight or liquid-tight. Two rotating, circular electrodes (electrode wheels), or one circular and one bar-type electrode, are used for transmitting the current to the work metal. When two electrode wheels are used, one or both wheels are driven either by means of a gear-driven shaft or by a...