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make-brake sliding contacts

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Published: 01 January 2006
Fig. 13 One-stroke hemming die and movement of die components during hemming. (a) Workpiece, B, is placed over slide A using a component of the die as a stop, and the entire upper die section begins to move down. (b) Slide C contacts the workpiece and makes the first bend for the hem. (c More
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006374
EISBN: 978-1-62708-192-4
... applied and the hardness of the two materials. For brake systems, the brake pad and disk consist of unique tribological contact where the pad is soft with a rough surface while the disk is hard with a relatively smooth surface. When the brake pads are sliding on the disk/rotor, the mechanism...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003157
EISBN: 978-1-62708-199-3
... process, and coprecipitation. composite materials electrical contacts make-brake arcing contacts make-brake sliding contacts property requirements pure metals sliding contacts wrought alloys ELECTRICAL CONTACTS are metal devices that make and break electrical circuits. If an ideal...
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
... is released at the contact points between two sliding surfaces, there can be two types of energy dissipation—interfacial and bulk. Though subjectively defined, the interface may be considered the region of the material very close (a few microns) to the contact point. This region of the material is almost...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006850
EISBN: 978-1-62708-395-9
... their physical and mechanical properties.) Examples of the tribological use of plastics (involving sliding between two surfaces) include gears and cams of various machines, tires, brake pads, conveyors, hoppers, automobile body parts, aircraft and spacecraft parts, hip/knee joint replacements, roller-skate...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006100
EISBN: 978-1-62708-175-7
... Abstract Friction materials are the components of a mechanism that converts mechanical energy into heat upon sliding contact. This article discusses the selection criteria, manufacturing process, and applications of friction powder metallurgy materials. It provides information...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003279
EISBN: 978-1-62708-176-4
... to a surface, strong adhesion is desirable, but in other instances, as in the seizure and galling of sliding bearings, strong adhesion is not desirable. Likewise, low friction might be desirable for a face seal but undesirable for a brake pad. A high rate of abrasive wear for a paper mill slitter-knife blade...
Book Chapter

Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005177
EISBN: 978-1-62708-186-3
.... In hydraulic press brakes, length of stroke and location of the top and bottom of the stroke (within limits of the cylinder length) are adjustable. The point of rapid advance and return of the ram and its speed during contact with the workpiece are also adjustable; this adjustment makes possible a dwell period...
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005112
EISBN: 978-1-62708-186-3
.... The toggles operate an outer slide, which clamps the blank against the die, while the punch, operated by the inner slide directly from the crankshaft, performs the draw operation. Principal components of a toggle mechanism are shown in Fig. 15 . Clutches and Brakes in Mechanical Presses Both clutches...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003177
EISBN: 978-1-62708-199-3
.... For drawing operations, contact velocities are critical with respect to the workpiece material, and presses are generally operated at slide speeds from 10 to 300 strokes/min, with the slower speed for longer stroke drawing operations. Mechanical Versus Hydraulic Presses Mechanical presses are the most...
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
... alloy. Figure 6(c) shows the wear map of a semimetallic friction material, used for vehicular brake pads, sliding against a pearlitic cast iron, a common choice for brake rotors ( Ref 19 ). The map displays the mild wear region at low values of both contact pressure and sliding velocity. The friction...
Series: ASM Handbook
Volume: 2B
Publisher: ASM International
Published: 15 June 2019
DOI: 10.31399/asm.hb.v02b.a0006551
EISBN: 978-1-62708-210-5
... are finer. Wear rates are also smaller but not necessarily insignificant. Under low contact pressure and sliding speed, mild wear (MW) occurs due to surface oxidation with formation of protective layers composed of a mixture of oxides, originating also from the counterface. In this mild regime, fine...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006410
EISBN: 978-1-62708-192-4
... deformation in the actual contact areas, because the material is melted or softened owing to the high interface temperatures at the sliding contacts. Temperatures in the circumferential environment also affect the deformation. In general, soft materials are susceptible to heat. Although the materials exhibit...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003281
EISBN: 978-1-62708-176-4
... between sliding members could affect operation. There is a close parallel between the history of friction science and the development of transportation systems, because friction problem solving has enabled the development of all kinds of engines, motor bearings, brakes, transmissions, seals, tires...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006361
EISBN: 978-1-62708-192-4
... in lubricated systems depends more on the nature of the lubricant than on the nature of the materials that are in sliding contact ( Ref 2 ). Later in that century, the Petrov equation was developed, which related the friction coefficient of a lubricated journal-bearing couple to the viscosity of the lubricant...
Book Chapter

Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006348
EISBN: 978-1-62708-179-5
... Abstract This article presents typical wear applications for a variety of cast iron grades in a table. In general, wear is classified according to three major types: adhesive (frictional) wear (sliding and rolling) caused by contact of one metallic surface with another; abrasive wear caused...
Book Chapter

Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006416
EISBN: 978-1-62708-192-4
... for a specific wear application, and examples are given in this article for cast irons. In general, wear is classified according to three major types: Adhesive (frictional) wear (sliding and rolling) caused by contact with another metallic surface Abrasive wear caused by contact with metallic (shots...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006380
EISBN: 978-1-62708-192-4
... Abstract This article provides a broad overview of sliding and adhesive wear, its processes, and its control, with special attention to three general classes of materials: metals, ceramics, and polymers. It discusses the ways in which materials can be damaged and removed during sliding contact...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006373
EISBN: 978-1-62708-192-4
... and at low sliding velocities, the friction coefficient of PTFE with metals is very low. This makes PTFE excellent material for sliding bearings including dry bearings. Polyamides present another type of polymer used to fabricate sliding bearings. As a rule, they contain reinforcing fillers and dry...
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005155
EISBN: 978-1-62708-186-3
... control ring height bendability. The ability of a material to be bent angles less than the angle of bite are termed during rolling. around a speci ed radius without fracture. contact angles or rolling angles. bend allowance. The amount of sheet metal required for making a bend around a given radius. Bend...