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green machining

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Published: 30 September 2015
Fig. 9 Machining of green parts (green machining), such as this green turning operation, is performed to obtain complex part shapes. More
Image
Published: 01 November 1995
Fig. 13 Typical flat vacuum chuck system used in green machining operations. (a) Plan view of chuck surface incorporating either circular path grooves (left) or straight path grooves (right) to provide sites for vacuum inlets. (b) Sectional elevation showing use of compliant filler to provide More
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006053
EISBN: 978-1-62708-175-7
..., green machining, and injection molding. carbide powders cold isostatic pressing extrusion green machining injection molding powder compaction powder consolidation uniaxial pressing CONSOLIDATION and shaping of grade powders is carried out using several methods, depending on the size...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003053
EISBN: 978-1-62708-200-6
... pressing, cold isostatic pressing, slip casting, tape casting, roll compaction, extrusion, and injection molding. It describes the advantages, equipment and tooling, and material requirements of green machining, the machining of ceramics in an unfired state with the intent of producing parts as close...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006103
EISBN: 978-1-62708-175-7
..., green machining, presintering, microcleanliness improvement, free-machining additives, microstructure modification, and improvements in tool materials. The effects of free-machining agents on machinability and the sintered properties of PM steels are also reviewed. free-machining additives green...
Book Chapter

Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005243
EISBN: 978-1-62708-187-0
... of molding machine. This same machine may not be able to achieve equal hardness in the mold mass for a part with deep pockets or changes in elevation and will thus sacrifice much of the tolerance capability gained. Mold Types There are two basic types of green sand molds: flask and flaskless. Flask...
Image
Published: 01 November 2010
Fig. 1 Aircraft engine and airframe components with large buy-to-fly ratios and high machining costs. (a) Typical aircraft engine forging. Blue (dark outer region): forging shape; red (central region): intermediate shape; green (bright core region): finish machined shape; large volume More
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006083
EISBN: 978-1-62708-175-7
... used lubricant. This increased green strength reduces the potential for green part damage during handling and it might also offer the possibility of green machining the part prior to sintering. Fig. 3 Green strength of various PM premixing alternatives. EBS, ethylene bis stearamide. AncorMax...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005259
EISBN: 978-1-62708-187-0
... be used to fasten the green sand mold to the table of the centrifugal casting machine. In the first method, two pins are fastened to the table over which the flask is lowered. The cope and drag are held together by clamps in the usual manner of static casting. In the second method, a device...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006297
EISBN: 978-1-62708-179-5
... aggregates, clays, water, and additives in green sand, chemically bonded organic resins, and inorganic binders in self-setting, thermosetting, and gas-triggered systems. It discusses three main types of reclamation systems: wet, dry, and thermal. The article concludes with a description of both nonpermanent...
Image
Published: 01 December 2008
Fig. 32 Valve plate that did not require machining of slots when it was cast in a shell mold instead of a green sand mold More
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005334
EISBN: 978-1-62708-187-0
.... The article discusses the flux process and fluxless process for the melting and pouring of magnesium alloys. It describes the advantages and disadvantages of green sand molding and tabulates typical compositions and properties of magnesium molding sands. The article provides information on the machining...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005252
EISBN: 978-1-62708-187-0
... in shell molds but not in production quantities. As compared to conventional green sand molding, the shell-mold process can produce castings with greater dimensional accuracy and thus reduce the amount of machining required for completion of the part. Shell molds impart a smoother surface to castings...
Image
Published: 01 December 2008
Fig. 31 Pump casting produced with minimum draft in a shell mold When casting had been poured in a green sand mold, shaft portion required a draft angle of 1° 30 min and had to be machined. More
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006106
EISBN: 978-1-62708-175-7
... a metallurgical addition of 1 to 2 wt% Pb to improve the machinability of the alloy. Particle shape and particle size distribution can affect the pressing cycle through the powder flow rate, die-fill characteristics (apparent density), compacted (green) density, and green strength of the compacted powder...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006445
EISBN: 978-1-62708-190-0
... and sintered PM parts: density variations, compaction and ejection cracks, microlaminations, poor degree of sintering, and voids from prior lubricant agglomerates. It describes the various methods applicable to green compacts: direct-current resistivity testing, radiographic techniques, computed tomography...
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
... on the manufacturing process of powder metallurgy friction materials through a process of mixing/blending, compacting, and sintering. The final machining that they undergo, to ensure that they meet dimensional specifications, is also discussed. blending compacting friction powder metallurgy materials...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006058
EISBN: 978-1-62708-175-7
... and aluminum-beryllium alloys such as extrusion, rolling, welding, joining, and machining are discussed. The article discusses quality control and provides information on the structural, optical, and high-purity grades of beryllium. aluminum-beryllium alloys beryllium alloys beryllium powder cold...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005187
EISBN: 978-1-62708-187-0
.... Shape casting processes ratings chart Table 1 Shape casting processes ratings chart Mold method Capabilities Applicable metals Productivity (a) Disposable cores Casting size Dimensional control Expendable mold with permanent patterns  Bonded sand processes   Green sand...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003397
EISBN: 978-1-62708-195-5
... laminated object manufacturing (LOM). The part on the right has been fully cured. For CMCs, the LOM machine is used again only to lay up and shape a green composite. Ceramic-matrix composite prepregs must contain a polymer-ceramic precursor resin of sufficient tack, or a tackifier can be used...