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machining allowances

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250129
EISBN: 978-1-62708-345-4
.... Gears with a DP of 5 to 20 are commonly forged with little or no machining allowance. The die life decreases significantly when forging finer-pitch gears. The forging of 5 DP gears with an involute tolerance of 0.013 mm (0.0005 in.) and total composite error of 0.08 mm (0.003 in.) has been reported...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2013
DOI: 10.31399/asm.tb.mfub.t53740103
EISBN: 978-1-62708-308-9
... the die cavity without rupturing it. In HERF, the high ram velocities forge parts with thin webs, high rib height-to-width ratios, and small draft angles to profiles sufficiently accurate that machining allowance can sometimes be as little as 0.500 mm (0.0197 in.). Even parts made of difficult-to-forge...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720293
EISBN: 978-1-62708-305-8
... of intergranular cracking throughout the material because of an error in composition or heat treatment, or the cracks may be on the surface only as a result of machining or grinding. Surface cracking may result from insufficient machining allowance, which does not allow for complete removal of imperfections...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040257
EISBN: 978-1-62708-300-3
... the desired part geometry, especially in aerospace forging. This industry produces a relatively small number of parts, which does not justify the high die costs. Thus, it is considered economical to forge a part with high machining allowances to reduce die costs while simultaneously increasing machining costs...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870119
EISBN: 978-1-62708-314-0
...-axis properties Automated preform fabrication process Well suited for complex curved parts Good drapeablility Size limitation due to machine availability Low out-of-plane properties 3-D braided preform Good balance of in-plane and out-of-plane properties Well suited...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280091
EISBN: 978-1-62708-267-9
... 50%. Recommended draft angles are 5 to 7 degrees. Machining allowance for finish forgings is 0.15 to 0.25 in. (3.81 to 6.35 mm). Some shapes can require higher minimum allowables than shown above. (a) Based on limited data Forging requires a source of force and of heat. As such, forging...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250139
EISBN: 978-1-62708-345-4
... can be formed simultaneously with the gear profile during P/M manufacture, eliminating subsequent machining operations. Thus, P/M gear manufacturing allows efficient utilization of materials for moderate- to high-volume production. The minimum quantity required to make the P/M process economically...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2011
DOI: 10.31399/asm.tb.cfw.t52860001
EISBN: 978-1-62708-338-6
... on rocket motors/pressure vessels have had South Korea as their source. The advances in machine control give the winders an opportunity to wind noncylindrical and nonsymmetric objects and allow for a much more precise laydown of fiber. The higher capacities of computer memory that is now available allow...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.aceg.t68410253
EISBN: 978-1-62708-280-8
... showing: The surface defect acceptance criteria ( Fig. 10.3 ) Tensile and fatigue test bar locations Hardness measurement locations Microstructure sample locations Fig. 10.3 Surface anomalies acceptance criteria (machined and as cast) Surfaces Allowable Anomalies...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720049
EISBN: 978-1-62708-305-8
... Bridge The fixed bridge configuration ( Fig. 3b ) provides a very rigid structure and allows a relatively light moving x - z structure that can achieve fast x - z moves. The moving table in larger machines can become massive, with decreased throughput capability. The influence of part weight...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500273
EISBN: 978-1-62708-317-1
... accuracy of the parts, especially when using two synchronized robots. Fig. 13.4 Kinematic incremental sheet forming using two forming tools. Source: Ref 13.2 In principle, any computer-controlled machine that allows a forming tool to move along a defined tool trajectory in space can be used...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.tb.ssde.t52310181
EISBN: 978-1-62708-286-0
... loses its lubricity, and the oxide acts as a high-temperature lubricant that will allow faster machining speeds without the need to use specialized tooling. Data generated at Ugitech as well as data generated by other producers have shown that once sulfur content reaches 0.30%, the contribution toward...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720063
EISBN: 978-1-62708-305-8
..., including: Identification of shapes Measurement of distances and ranges Gaging of sizes and dimensions Determining orientation of parts Quantifying motion Detecting surface shading These functional capabilities allow users to employ machine vision systems for cost-effective...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290111
EISBN: 978-1-62708-319-5
... are approached to suggest changes that suit the shaping process. A preferred design approach is to understand process attributes and to identify any limitations early to control costs, allowing for machining to meet tight tolerances. In sintered components, large changes in section thickness create problems...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.9781627083195
EISBN: 978-1-62708-319-5
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2011
DOI: 10.31399/asm.tb.cfw.t52860035
EISBN: 978-1-62708-338-6
.... This approach requires a little more thought and effort on the part of the user but ultimately allows the designer more creativity. 3-D Machine Path—Payout Path Strategies This is a simple process, because the fiber under tension is placed onto the mandrel in a straight line tangent to the surface path...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290061
EISBN: 978-1-62708-306-5
... ), and throat depth is typically 305 to 915 mm (12 to 36 in.). Universal: A swivel-type head and interchangeable lower arms allow the axis of rotation of the electrode wheels to be set either at right angles or parallel to the front of the machine. Portable: Work is clamped in a fixture...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770001
EISBN: 978-1-62708-337-9
... with laboratory testing that must be recognized and, where possible, allowed for. One problem is that the test specimen and method of loading often bear little relationship to the machine part and service conditions they are supposed to represent. Apart from that, test pieces are often small in section so...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550621
EISBN: 978-1-62708-307-2
.... Two important enabling fabrication processes for aluminum have been developed in the last ten years. The first, high-speed machining, allows the design of weight-competitive high-speed-machined “assemblies” in which sheet metal parts that were formerly assembled with mechanical fasteners can now...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.aceg.9781627082808
EISBN: 978-1-62708-280-8