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rough blanks

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Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003177
EISBN: 978-1-62708-199-3
... stresses from prior processing. The fine structure of the metal surface also may vary with prior history and be quite different from that of the bulk material. The surface roughness also varies in many geometrically significant ways. Interposed between these nonhomogeneous surfaces is a lubricating film...
Book Chapter

By Robert Bolin
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003982
EISBN: 978-1-62708-185-6
... producing ring blanks and the various types of blanking and rolling tools used in ring rolling process. The article concludes with a discussion on rolled ring tolerances and machining allowances. ancillary operations automatic radial-axial multiple-mandrel ring mills blanking four-mandrel...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004004
EISBN: 978-1-62708-185-6
... tolerance capabilities and shows dimensional variations obtained in production runs of specific cold-headed products. Surfaces produced by cold heading are generally smooth and seldom need secondary operations for improving the finish. Surface roughness, however, can vary considerably among different...
Book Chapter

Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004012
EISBN: 978-1-62708-185-6
... roughness of dies is usually attained easily, regardless of the tool steel selected. Required finishes for fine-pitch threads can be obtained most economically by using A2 and either machining or grinding the die threads. As a short-term solution for a deficient die setup, which is the cause of most early...
Series: ASM Handbook
Volume: 5B
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v05b.a0006016
EISBN: 978-1-62708-172-6
..., and chemical contaminants. When inspecting concrete prior to coating installation, three areas of concern exist: surface roughness, moisture content in concrete, and acidity/alkalinity of the surface. The article provides information on the industry standards for assessing surface cleanliness. It...
Book Chapter

Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003987
EISBN: 978-1-62708-185-6
... rolling to form a teaspoon bowl were, respectively, 45 and 40 HRC. Harder metal leads to shortened life of the blanking die. The surface roughness of a well-finished piece of coined stainless steel is about 0.02 to 0.1 μm (1 to 4 μin.); this must be developed in the coining operation, because no major...
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.9781627081863
EISBN: 978-1-62708-186-3
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003194
EISBN: 978-1-62708-199-3
.... Abrasive grain size: Roughing 200–400 mesh, finishing 800–1000 mesh Abrasive carrier: Usually water mixed with about 50% of abrasive, by volume Tolerances Practical: ±0.001 in. Possible: 0.0005 in. (total) Surface Roughing: 25 R a Finishing: 10 R a No heat affected surface produced...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.9781627081979
EISBN: 978-1-62708-197-9
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001232
EISBN: 978-1-62708-170-2
... selection work material ABRASIVE FINISHING includes many commercial processes, which can be generally classified as rough grinding, precision grinding , or high-precision grinding. The distinctions among these categories are based on the desired material removal rates and the acceptable tolerance or...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003152
EISBN: 978-1-62708-199-3
... MPa (7 to 22 ksi). In cold isostatic pressing, the grade powder is consolidated into a rough billet or ingot using equal pressure from all directions. This rough billet is then preformed or machined to a net shape. Extrusion of carbide grade powders is used to produce long components of small...
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
... equipment, a myriad of information can be obtained from a sample. This article presents a high-level introduction to techniques often used for chemical analysis during failure analysis. There are several key considerations when assessing a damaged or fractured part due to surface roughness, presence of...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005417
EISBN: 978-1-62708-196-2
... rolling, for instance, among the parameters that influence the interactions are the work roll and the back-up roll dimensions; their hardness, magnitude, and direction of the surface roughness; cooling systems; lubricant delivery; and the location of nozzles. The mechanical properties of the rolls and the...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004005
EISBN: 978-1-62708-185-6
... diameter. The quality and roughness of the cut has an important effect on quality of the extrusion. Shearing is a chipless process and is a more economical means of producing billets due to much higher production rates. Variation in the sizes and shape of the billet is a major disadvantage of shearing...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003179
EISBN: 978-1-62708-199-3
...-fifth to one-fourth the diameter of the bar ( Fig. 6 ). The burnished portion appears smooth, whereas the fractured portion is comparatively rough. Fig. 6 Effects of shearing a round bar with a straight knife OXYFUEL GAS CUTTING (OFC) includes a group of cutting processes that use...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003983
EISBN: 978-1-62708-185-6
... has rough surface Inadequate side clearance Increase side clearance Work sticks to die entrance taper Wipe every fourth or fifth workpiece with graphite or molybdenum disulfide powder. Too much die opening Reset machine with proper shims. Dirt and scale in die Clean dies and remove loose...
Book Chapter

Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003978
EISBN: 978-1-62708-185-6
... costs. The process of roll planishing replaces the time-consuming planishing operation on a press or hammer. Rough open-die-forged preforms are fed into a single-stand reversing planishing mill. The system on which this process is used in a plant has a single stand of rolls with...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006791
EISBN: 978-1-62708-295-2
..., the surface finish of contact surfaces is very important, because highly polished ( R a < 0.25 μm) or very rough ( R a > 1.5 μm) surfaces increase the tendency for adhesion and material transfer. Smooth surfaces result in more contact and increased adhesive forces. The absence or very small...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003252
EISBN: 978-1-62708-199-3
... microscopes cannot image rough surfaces—samples must be flat in order to be in focus. Type of information provided: Light microscopes provide images and morphological information, but they do not provide any direct chemical or crystallographic information about the microstructural features observed...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003986
EISBN: 978-1-62708-185-6
... finish exceed normal expectations to the extent that some of the postforge operations can be eliminated. In some cases, functional surfaces (i.e., the teeth on bevel gears) will be finished as forged. In other cases, rough machine cuts can be avoided and some surfaces of the forgings can be made to...