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machining allowance

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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
... 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 produced on the as-cast surface, or it may result from faulty machining...
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...
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...
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...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550621
EISBN: 978-1-62708-307-2
..., plastics, ceramic, or composite and to narrow it to a group of materials. The precision of property data needed is rather low. If an innovative choice of material is to be made, it must be done at the conceptual design step because later in the design process too many decisions have been made to allow...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2011
DOI: 10.31399/asm.tb.cfw.t52860001
EISBN: 978-1-62708-338-6
... mandrel placement, automatic tie-on and cut-off, automated loading of wet fiber-covered mandrels into the curing oven, and finally, automated extraction. The new machine systems have allowed pipe manufacturers the ability to wind rather than hand lay-up, spray-up, resin transfer mold, or compression mold...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720049
EISBN: 978-1-62708-305-8
... hardware. 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: 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...
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 July 2009
DOI: 10.31399/asm.tb.bcp.t52230295
EISBN: 978-1-62708-298-3
...Abstract Abstract The vast majority of beryllium products are manufactured from blocks, forms, or billets of compacted powder that are machined or worked into shape. This chapter describes the metalworking processes used, including rolling, forming, forging, extrusion, drawing, and spinning...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2011
DOI: 10.31399/asm.tb.cfw.t52860035
EISBN: 978-1-62708-338-6
... configurations, from a simple two-axis machine to one with six or more degrees of freedom. Indeed, postprocessing to allow winding by using a standard commercially available six-axis robot is also desirable. When the wealth of different types of CNC controller systems that are available and used by machine...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.aceg.9781627082808
EISBN: 978-1-62708-280-8
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 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060117
EISBN: 978-1-62708-261-7
... of commercial forging production and is adaptable to low-volume or high-volume production. Closed-die forgings are usually designed to require minimal subsequent machining. In addition, closed-die forging allows control of grain flow direction, and it often improves mechanical properties in the longitudinal...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500249
EISBN: 978-1-62708-317-1
... process, many spinning machines are equipped with a teach-in panel ( Fig. 12.13 ). By using a joystick to move the forming tool, an individual tool path can be recorded and transferred to a CNC code. In a playback mode, this tool path can be repeated to allow a computer-controlled production of the part...