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reduced-rake points

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480293
EISBN: 978-1-62708-318-8
... from the machined surface. Rake angles are not especially critical. Tool life progressively improves as the radial rake is reduced from +6 to 0° and down to –10°. Positive rake angles are generally used on high-speed steel cutters, but occasionally it is necessary to reduce the rake to zero...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230339
EISBN: 978-1-62708-298-3
... or negative rake result in excessive edge cracking at the initiation or exit of a cut. Tools with larger clearance angles can improve metal removal but at a reduced tool life. Suggested tool geometries are given in Fig. 21.1 . Tools with multiple points, each with a modified geometry, have worked...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 September 2023
DOI: 10.31399/asm.tb.stmflw.t59390456
EISBN: 978-1-62708-459-8
... the tribological point of view, the resultant P R can be regarded as the vector sum of the normal force P n acting perpendicular to the rake face and of the friction force F acting parallel to it. For a sharp tool with adequate clearance, friction on the clearance face can be neglected. Referring...
Book Chapter

By Soumya Subramonian
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500001
EISBN: 978-1-62708-317-1
... in a greater shearing force. A higher rake reduces the required shearing force, allowing a smaller shearing machine to shear the material. However, a higher rake increases the distortion of material ( Ref 1.22 ). Thus, rake is a trade-off between shearing force, distortion, and other factors. Blade Clearance...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120313
EISBN: 978-1-62708-269-3
... for most titanium drilling operations over the conventional chisel edge. Equipment is available for grinding the spiral point on any two-fluted, high-speed steel drill up to 50.8 mm (2 in.) diameter. Companies employing spiral-point drills report these type drills reduce the large negative rake angle...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2013
DOI: 10.31399/asm.tb.mfub.t53740213
EISBN: 978-1-62708-308-9
... under the tool and adhering to the machined surface. Built-up edge formation can often be minimized or eliminated by reducing the depth of the cut, increasing the cutting speed, using positive rake tools, or applying a coolant. Fig. 9 Continuous chip with built-up edge. Source: Ref 6 Tool...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280189
EISBN: 978-1-62708-267-9
... 350 HB. Drills with standard chisel-edge points can be used for softer alloys. Drill wear and life can be controlled to some extent by modifying the drill point. Chipping of drill corners can be reduced by decreasing the point angle; however, severe wear at the point can be reduced by increasing...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 September 2023
DOI: 10.31399/asm.tb.stmflw.t59390007
EISBN: 978-1-62708-459-8
... approximately it can be said that below one-third the melting point, the material strain hardens , that is, its strength increases as a result of deformation (also called cold working ). Above one-half the melting point ( hot working ), atomic mobility increases greatly, and strain hardening is much reduced...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610461
EISBN: 978-1-62708-303-4
... a large number of small cones with the points facing in the flow direction. Erosion-corrosion can be prevented, or reduced, through improved design, such as increasing the diameter and using streamlined bends in pipes, by altering the environment by deaeration or the addition of inhibitors...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630169
EISBN: 978-1-62708-270-9
... Abstract This chapter is a detailed account of the general characteristics and effects of and the methods for preventing or reducing different categories of wear failures, namely abrasive (erosive, grinding, and gouging), adhesive, and fretting wear. abrasive wear adhesive wear fretting...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550223
EISBN: 978-1-62708-307-2
... have melting points higher than those of steels, but maximum useful temperatures for structural applications generally range from 425 to 595 °C (800 to 1100 °F). Titanium has the ability to passivate and thereby exhibit a high degree of immunity to attack by most mineral acids and chlorides. Titanium...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280041
EISBN: 978-1-62708-267-9
... continues until the entire charge is molten. At this point, the initial charge volume is reduced to that of the molten metal, and the furnace may be opened and the remaining portions of the charge added (the recharge). This additional charge is melted by the arcs until the entire bath is molten. Further...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770099
EISBN: 978-1-62708-337-9
... chapters, their significant influence on properties justifies their review. Grain Size For optimal properties, it is essential that the grain size of a carburized and hardened component is both uniform and fine. Generally, the starting point is a grain-refined steel having an ASTM grain size from...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 September 2023
DOI: 10.31399/asm.tb.stmflw.t59390241
EISBN: 978-1-62708-459-8
... of the workpiece must be reduced ( pointed ) for threading through the die. Pointing techniques are related to forging ( swaging or forge rolling ) or containerless extrusion ( push pointing ), and usually present no special tribological problems. Pointing, threading, and die changing account for most...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.mgppis.t60400245
EISBN: 978-1-62708-258-7
... point object, as focused by a lens system. With monochromatic light, it consists of a central point of maximum intensity surrounded by alternate circles of light and darkness caused by the reinforcement and interference of diffracted rays. The light areas are called maxima and the dark areas minima...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2023
DOI: 10.31399/asm.tb.ceeg.t59370187
EISBN: 978-1-62708-447-5
... in the casting. While this is achieved in GPM by tilt pouring, the nonturbulent mold fill in LPPM and LPSPM is achieved by filling the mold from the bottom and controlling the fill pressure to avoid turbulence. The application of pressure during solidification achieves two objectives: Reduces the size...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.9781627082679
EISBN: 978-1-62708-267-9
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2013
DOI: 10.31399/asm.tb.mfub.t53740325
EISBN: 978-1-62708-308-9
... the ratios of the various ingredients, a wide range of melting points, operating temperature ranges, chemical reactivity, and other parameters can be obtained. As a whole, they offer combinations of reactivity, solvency, and speed unavailable in any other cleaning medium. The chemistry involved during...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2023
DOI: 10.31399/asm.tb.ceeg.9781627084475
EISBN: 978-1-62708-447-5
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.mgppis.9781627082587
EISBN: 978-1-62708-258-7