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thread milling

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c9001519
EISBN: 978-1-62708-223-5
... the collet inward against the tapered sleeve, causing the collet jaws to grip the workpiece. Fig. 1 AISI 4340 alloy steel draw-in bolt failed near the threads that screw into the collet. The collet fractured when it struck the work table of the vertical-spindle milling machine. The fracture...
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
...Abstract Abstract The draw-in bolt and collet from a vertical-spindle milling machine broke during routine cutting of blind recesses after a relatively long service life. The collet ejected at a high rotational speed due to loss of its vertical support and shattered one of its arms upon impact...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001660
EISBN: 978-1-62708-236-5
...Abstract Abstract Failure analysis was performed on threaded Ti-6Al-4V fasteners that had fractured in the threads during installation. Scanning electron microscopy (SEM) and optical metallography revealed that the fractures initiated in circumferential shear bands present at the thread roots...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c9001232
EISBN: 978-1-62708-233-4
...Abstract Abstract A bolt breaks along a change in cross section well below its rated capacity. An anchoring screw spins freely in place, having snapped at its first supporting thread. A motor unexpectedly disengages its load, its driveshaft having fractured near a keyway. Such failures...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001811
EISBN: 978-1-62708-180-1
..., such as lifting lugs or eyes Built-in members that are the items necessary for the operation of lifting equipment, such as shafts, gears, and drums Most of the failures discussed are related to the more common and critical components of lifting equipment used in steel mills and similar industrial...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001814
EISBN: 978-1-62708-180-1
..., and so on) and machining processes (drilling, turning, milling, and so on). Second, tools and dies are generally used at higher hardnesses than most other steel products; 58 to 68 HRC is a typical range. Dies for plastic molding or hot working are usually used at lower hardnesses, typically from 30 to 55...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001812
EISBN: 978-1-62708-180-1
... the thread to the shank. Failure origins are often imperfections in the metal caused by segregation in the form of inclusions, such as sulfides and oxides in the ingot, or by folds, laps, or seams that have formed because of faulty working either in the semifinishing or finishing mills. Seams...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001329
EISBN: 978-1-62708-215-0
... from valve body Specimen 4 was an entire valve assembly with an elbow, two pieces of welded pipe, and a threaded fitting. An area of staining (probable leakage) was noted on the elbow ( Fig. 3 ). To determine whether cracks were present near the area of probable leakage, the valve assembly...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001815
EISBN: 978-1-62708-180-1
... little power is involved. Considerable power must be transmitted by commercial worm-gear sets; therefore, the gears of these sets are throated to provide a greatly increased area of contact surface. The gear tooth theoretically makes contact with the worm thread along a line curved diagonally across...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001842
EISBN: 978-1-62708-241-9
... analysis, microhardness and tensile testing, stress calculations, and vibration measurements. Based on the results, the roll fracture was attributed to high-cycle fatigue associated with a plug weld over one of the five threaded fasteners added to secure a balance weight inside the roll. The balance weight...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003526
EISBN: 978-1-62708-180-1
... finite element analysis (FEA) are shown in (b) for the supported beam (bottom left) and the notched beam (bottom right). Fig. 4 Example of a three-dimensional half-symmetry finite element model of a housing Fig. 5 Axisymmetric finite element model of a threaded connection showing...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006773
EISBN: 978-1-62708-295-2
...-element analyses are primarily used in the design and upgrade phases of systems. Before any owner of a power plant, refinery, paper mill, chemical plant, or power piping or pressurized process system accepts delivery, analyses showing code compliance will be provided. These include analyses of pressure...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006759
EISBN: 978-1-62708-295-2
... for specific materials or components. Often provided with raw materials and formed parts are ladle analyses from the foundry/mill or certificates of conformance (CoC) indicating the composition of the materials from an independent test house. Bulk chemical analysis during a failure investigation can...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003553
EISBN: 978-1-62708-180-1
... as fretting, fatigue, and corrosion fatigue; accordingly, a compromise in dimensioning is often the safest procedure. Bolts, studs, and other threaded fasteners are often pretorqued so that they are under tensile stresses that are significant fractions of the yield strength, making them a frequent victim...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.9781627082952
EISBN: 978-1-62708-295-2
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001808
EISBN: 978-1-62708-180-1
... of a threaded connection, a set screw, or a keyway, can influence failure. It is also important if power is transmitted to or taken from the shaft by gears, splines, belts, chains, or torque converters. Manufacturing Records Manufacturing records may indicate when the part was made and the material...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c9001578
EISBN: 978-1-62708-233-4
... Strip Caused by an Induction Furnace in a Steel Mill Case #3: Vibration of Microscope in Hospital Microsurgery Room Case #4: Torsional Vibration on a Reciprocating Pump Case #5: Ghosts Case #6: Vibration of Nuclear Magnetic Resonance Machine Case #7: Vibration Induced by Sound Case #8...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003500
EISBN: 978-1-62708-180-1
... in manufacturing the metal product (such as in TQM and Six Sigma systems), material defects occur. Many defective products are prevented from leaving the mill, foundry, or forge through diligence in adhering to internal procedures and quality-assurance systems. Yet defective materials are sometimes delivered...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006753
EISBN: 978-1-62708-295-2
... on Intergranular attack due to electrochemical machining Residual-stress cracking due to overheating Metalworking processes Cracking, tears, or necking due to forming/deep drawing Laps due to thread rolling/spinning Tool marks and scratches from forming Surface tears due to poor surface...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006785
EISBN: 978-1-62708-295-2
... and residential plumbing systems, SCC can occur in brass plumbing components that are used in a hard temper condition or that have residual stresses from final finishing, such as rolled threads. Stainless steel clamps used in residential cross-linked polyethylene (PEX) plumbing systems exhibit SCC when moisture...