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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.9781627082235
EISBN: 978-1-62708-223-5
Image
Published: 30 August 2021
Fig. 6 High-speed bearings for machine tool applications. Source: Ref 18 More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c0047840
EISBN: 978-1-62708-223-5
.... As a corrective measure, the hole through the square end of the mandrel was incorporated into the design of the tool and was drilled and reamed before heat treatment and specified hardness of the threaded portion and square end of the mandrel was reduced. Drilling Electric discharge machining Rockwell...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006826
EISBN: 978-1-62708-329-4
... preventive measures workpiece failures Machining-Related Failures Machining-related failures may be characterized as: Machining workpiece (in-process) failures: Machining condition and parameters contributing to (in-process) workpiece failures: Machine tool, cutting tool, cutting fluid...
Image
Published: 01 January 2002
Fig. 3 A6 tool steel tube-bending-machine shaft that failed by fatigue fracture. Section A-A: Original and improved designs for fillet in failure region. Dimensions are in inches. View B: Fracture surface showing regions of fatigue-crack propagation and final fracture More
Image
Published: 01 January 2002
Fig. 18 AISI O6 graphitic tool steel punch machined from centerless-ground bar stock that cracked after limited service. (a) Cracks (arrows) accentuated with magnetic particles. (b) Microstructural examination revealed an overaustenitized structure consisting of appreciable retained austenite More
Image
Published: 01 June 2019
Fig. 1 A6 tool steel tube-bending-machine shaft that failed by fatigue fracture. Section A-A: Original and improved designs for fillet in failure region. Dimensions are in inches. View B: Fracture surface showing regions of fatigue-crack propagation and final fracture More
Image
Published: 30 August 2021
Fig. 18 AISI O6 graphitic tool steel punch machined from centerless-ground bar stock that cracked after limited service. (a) Cracks (arrows) accentuated with magnetic particles. (b) Microstructural examination revealed an overaustenitized structure consisting of appreciable retained austenite More
Image
Published: 30 August 2021
Fig. 3 Type A6 tool steel tube-bending-machine shaft that failed by fatigue fracture. Section A-A: Original and improved designs for fillet in failure region. Dimensions are in inches. View B: Fracture surface showing regions of fatigue-crack propagation and final fracture More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c0047779
EISBN: 978-1-62708-223-5
... Abstract Two A6 tool steel (free machining grade) shafts, parts of a clamping device used for bending 5.7 cm OD tubing on an 8.6 cm radius, failed simultaneously under a maximum clamping force of 54,430 kg. The shaft was imposed with cyclic tensile stresses due to the clamping force...
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...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001384
EISBN: 978-1-62708-215-0
... with bolts manufactured using controlled processes. Machine tools Milling cutters 4340 UNS G43400 Hydrogen damage and embrittlement Background The draw-in bolt and the collet from a vertical-spindle milling machine broke during routine cutting of blind recesses after a relatively long...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c0047307
EISBN: 978-1-62708-223-5
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c9001014
EISBN: 978-1-62708-223-5
... Abstract A tool used to stretch reinforcement wires in prestressed concrete failed. All eight individual jaws were broken. Visual examination of the fracture surfaces indicated that about half of the broken parts had a partially dendritic appearance. Further, fracture surfaces near...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c0047154
EISBN: 978-1-62708-223-5
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001121
EISBN: 978-1-62708-214-3
... (1.250 in.) wide, and 250 mm (10 in.) long, was submitted for examination, The piece had been variously machined. Two holes had been made 34.3 mm (1.350 in.) from each end of the tool. The first, from the base of the part, was 25.4 mm (1.00 in.) in diameter and 19.3 mm (0.760 in.) long. A smaller hole...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c0089456
EISBN: 978-1-62708-223-5
... Abstract A cross-recessed die of D5 tool steel fractured in service. The die face was found to be subjected to shear and tensile stresses as a result of the forging pressures from the material being worked. The presence of numerous slag stringers was revealed by microscopic examination...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c9001183
EISBN: 978-1-62708-223-5
... of copper, nickel, and cobalt. A steel of similar composition, X38Cr-MoV5 1 (W-No. 2343) was used for hot working tools. The sliver originated from a damaged press tool. Hot working Impurities Studs Aluminum Metalworking-related failures In a continuously cast aluminum press stud two small...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0009222
EISBN: 978-1-62708-180-1
... Abstract This article describes the six fundamental factors that decide a tool's performance. These are mechanical design, grade of tool steel, machining procedure, heat treatment, grinding, and handling. A deficiency in any one of the factors can lead to a tool and die failure. The article...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c9001250
EISBN: 978-1-62708-223-5
... Abstract A broken cross-recessed die was examined. Examination of the unetched, polished section for impurities revealed several coarse streaks of slag. The purity did not therefore correspond to the requirements set for a high speed tool steel of the given theoretical quality DMo 5. After...