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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c9001155
EISBN: 978-1-62708-223-5
... Abstract Milling machine arbors were inserted with satellite spindles having a maximum speed of 1500 rpm, and broke out between the groove and the flange. The appearance of the fracture surface was the same on both arbors. The pronounced scan lines characterized the fractures as fatigue...
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Published: 01 June 2019
Fig. 3 Blistering on 2024-T4 extruded section after chemical milling. ×12. More
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Published: 01 June 2019
Fig. 9 The window assembly attached to the milling machine in preparation for removal of the shells More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001231
EISBN: 978-1-62708-232-7
... Abstract The rim of a gear wheel of 420 mm width and 3100 mm in diam broke after four years of operation time in a sheet bar three-high rolling mill. The rim was forged from steel with about 0.4C, 0.8Si and 1.1Mn. The rim started to break in the tooth bottom from a fatigue fracture which...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001513
EISBN: 978-1-62708-232-7
... Abstract While in the stationary mode, capillary action at the contact line between roller and race in a steel rolling mill taper bearing caused a concentration of lubricant and moisture to occur. This lead to lines of corrosion pits at roller intervals. During subsequent operation...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001255
EISBN: 978-1-62708-232-7
... Abstract Several back up rolls of 1400 mm barrel diam from a broad strip mill broke after a relatively short operating time as a result of bending stresses when the rolls were dismantled. The fracture occurred in the conical region of the neck at about 600 mm diam. The rolls were shaped steel...
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Published: 01 June 2019
Fig. 1 Photograph of the attrition mill, showing placement of the attrition mill wear plates More
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Published: 30 August 2021
Fig. 20 Sketch of sugar mill roller. (a) Three rollers of sugar mill placed in triangular formation. (b) Direction of maximum force acting on top roller More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001535
EISBN: 978-1-62708-232-7
... Abstract Although a precise understanding of roll failure genesis is complex, the microstructure of a broken roll can often unravel intrinsic deficiencies in material quality responsible for its failure. This is especially relevant in circumstances when, even under a similar mill-operating...
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Published: 01 June 2019
Fig. 14 Feature of this corrosion was that the mill scale had lifted on all surfaces, irrespective of orientation More
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Published: 01 June 2019
Fig. 2 Macrographs of new (left) and worn (right) attrition mill wear plates More
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Published: 01 June 2019
Fig. 3 An optical macrograph of a segment of the attrition mill wear plate showing gouging abrasion near the inner ring and grinding abrasion near the outer ring More
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Published: 01 June 2019
Fig. 7 Broken cam of a rolling mill clutch with many vibrational fractures originating from a key-groove, Approx 1 2 × More
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Published: 01 June 2019
Fig. 1 Fractured liners from a ball mill. (a) Fractured surface. (b) Cracks at underside. Both approximately 0.2x More
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Published: 01 June 2019
Fig. 2 Microstructures of the fractured ball-mill liners shown in Fig. 1 . (a) Primary carbides are the light-etching constituent; cracks are also present. 275x. (b) Crack morphology and shattered appearance of many primary carbides attributed to severe, localized stresses in service. 275x More
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Published: 01 June 2019
Fig. 1 Schematic arrangement of rolls in the 1-2-3-4 type Sendzimir mill More
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Published: 01 June 2019
Fig. 1 Fracture face of broken splined shaft from disc refiner of a newsprint mill More
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Published: 01 December 2019
Fig. 10 Cu-alloy plates in wear condition at JCO mill More
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Published: 01 December 2019
Fig. 7 Misaligned pipe supports at a pipe mill storage yard More
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Published: 01 January 2002
Fig. 10 Large circular spall on forged, hardened alloy steel mill roll. Faint white arrow marks location of subsurface fatigue origin. Beach marks are evident within the fatigue propagation zone, which is surrounded by fast brittle fracture. Source: Ref 4 More