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Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001797
EISBN: 978-1-62708-241-9
...Abstract Abstract Cam crack failures are a common occurrence in cam-follower systems often caused by excessive loading or inappropriate operating conditions. An investigation into such a failure was conducted to assess the effect of cam crack damage on the dynamic behavior of cam-follower...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c9001242
EISBN: 978-1-62708-223-5
...Abstract Abstract During dismantling of an eccentric camshaft of 340 mm diam that had worked for a total of 450,000 load reversals, it was found that it had cracked on both sides of the eccentric cam. The shaft was made of chromium-molybdenum alloy steel 34 Cr-Mo4 (Material No. 1.7220...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0048150
EISBN: 978-1-62708-235-8
...Abstract Abstract Grease-wiper springs for cams formed from stampings of 0.25-mm thick carbon spring steel (0.65 to 0.80% C) fractured at the 0.025 mm radius on the stamped 135 deg corner at a 90 deg bend after 5,000,000 cycles. Tool marks 2 to 2.3 mm from the center of the stamped bend were...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001807
EISBN: 978-1-62708-241-9
...Abstract Abstract Rolling contact fatigue is responsible for a large number of industrial equipment failures. It is also one of the main failure modes of components subjected to rolling contact loading such as bearings, cams, and gears. To better understand such failures, an investigation...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001832
EISBN: 978-1-62708-241-9
... through a demister, a condenser, and a steam reheater. All vapors exhaust through an outlet HEPA filter, manual damper, and ventilation fan. A sample of the exhaust vapor is normally taken by a continuous air monitor (CAM) or by a portable air sampler if the CAM is out of commission. The purge...
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
... to searching for material faults. Several examples of notch-induced vibrational fractures are presented along with guidelines for investigating their cause. Axles Bending fatigue Bolts Cams Crankshafts St 37 Fatigue fracture Vibrational fractures are cracks formed during often repeated...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001810
EISBN: 978-1-62708-241-9
... in Fig. 1 . Before picking, the torsion bar (9) is twisted via the cam (8), roller lever (6), and picking shaft (10) until the knee joint (5) tilts slightly beyond dead point. The front end of the torsion bar fits in the picking shaft, which is clamped on the picking lever (11) so that it performs...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c0047100
EISBN: 978-1-62708-233-4
... at the fillet (arrow A) were inspected by the magnetic-particle method. Cracks were found in the fillets of the notch (arrow B) in some of these shafts. The ends of the plunger shafts (arrow C, Fig. 1a ) were significantly deformed by peening. The peening had been caused by the impact of the cam against...
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
...) Micrograph showing the decarburized layer that was unable to support the more brittle, hard chromium plating. Etched with 3% nital. 60× As another example of the influence of decarburization on service life, Fig. 26 shows a fractured pin (16 mm or 5 8 in., in diameter) and gripping cam...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001733
EISBN: 978-1-62708-225-9
... cable to minimize fatigue sensitivity. Redesign drive assembly to eliminate drive cable—for example, use a cam system. ...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003516
EISBN: 978-1-62708-180-1
...Test results for a pressure vessel hatch cover (<xref rid="a0003516-s6-1-4" ref-type="sec">example 3</xref>) Table 5 Test results for a pressure vessel hatch cover ( example 3 ) Run No. Pressure Locking cams Hinge condition kPa psi 1 275.6 40 All attached Not intact 2...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001486
EISBN: 978-1-62708-234-1
.... Other workers have suggested the use of a cam-ground piston with this end in view. Much greater success in reducing the severity of the piston impact has attended work done by the Admiralty Research Laboratories, using a specially designed piston incorporating an annular belt of oil between upper...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c9001732
EISBN: 978-1-62708-218-1
... on the base of each pendulum. A striker was fixed to a test bench, and the lock engaged the striker as the pendulum dropped from an elevated position. The height of the pendulum was controlled by adjustable cams and set to produce impact loads at the striker equivalent to measured door slam loads. A schematic...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006789
EISBN: 978-1-62708-295-2
... processes and relevant tribosystems Table 1 Wear processes and relevant tribosystems Wear process Examples of relevant tribosystems Sliding wear Sliding bearings; cam and tappets; guides; seals; piston rings; disc-pad braking system; forming dies; cutting tools Fretting wear Riveted...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003571
EISBN: 978-1-62708-180-1
... gears and cams of various machines, tires, break pads, conveyors, hoppers, automobile body parts, aircraft, spacecrafts, hip/knee joint replacement, roller-skating wheels, and household appliances (washing machine, tubs, etc.). Wear of material parts is a very common cause of failure or low working life...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003558
EISBN: 978-1-62708-180-1
... Examples of wear showing loss of material, changes in dimension, and changes in appearance. (a) Erosion damage on a butterfly valve component. (b) Fretting damage on a friction band. (c) Sliding wear on a cam follower Fig. 4 Example of a log-log plot of wear data used to identify stable wear...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001558
EISBN: 978-1-62708-217-4
... hydrogen main fuel control valve, which ruptured during testing of the rocket engine of which it was a part. The area where the crack initiated comprised a cut-out in the internal surface to accomodate a cam follower bearing which was part of the valve operating mechanism. A schematic of the longitudinal...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001813
EISBN: 978-1-62708-180-1
... the maximum applied stress to approach the allowable limit. Tool marks at the bend were not considered major causes of fracture. Cyclic loading resulted from cam rotation. The corner radius was increased to 0.76 mm (0.030 in.), and the tools were repolished to avoid tool marks. These changes increased...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006793
EISBN: 978-1-62708-295-2
... during each cycle. A number of reciprocating hammer test rigs are in existence that use an impacter at the end of a lever arm moved up and down through a rotating cam ( Ref 36 , 52 , 53 , 54 ). A typical example is shown in Fig. 23 . Various mechanisms are employed to move the hammer up and down...
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003544
EISBN: 978-1-62708-180-1