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Volume 22, Issue 254
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Analysis of Stock Removal and Grinding ForceKenji SATO1956 Volume 22 Issue 254 Pages 127-131
Published: April 05, 1956
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSThe author designed a new torque-meter constituted by two pairs of bevel gears as shown in Fig. 2, and he measured the tangential grinding force and the amount of stock removal on various grinding conditions.
The rate of stock removal M in plunge-cut grinding may be analytically expressed by the formula,
M= 0.213 wV/r ρ( N/Hv)1.5
where, w is the mean cutting edge distance of the wheel, r is the mean radius of cutting edge assumed as a sphere, V is the grinding speed, N is the grinding pressure, ρ is the density and Hv is the Vickers hardness of the work.
The tangential grinding force T may be divided in two parts; one is the chip shearing force Ta, and the other is the friction between the wheel and the work, μN, where μ is the coefficient of friction in grinding. That is,
T=Ta+μN.
Experimentally, a was determined as 0.2 for hardened steel and 0.55 for anneald steel. And thus, the relation between the chip shearing energy E= TαV/M and the mean chip cross-sectional area a was shown in Fig. 8.View full abstractDownload PDF (634K) -
Hirosi HASUNUMA1956 Volume 22 Issue 254 Pages 131-135
Published: April 05, 1956
Released on J-STAGE: February 16, 2010
JOURNAL FREE ACCESSA wave optical theory of diffuse reflection of light from metal surfaces was given. Metal surface was represented by a probability function obeying the Ornstein-Uhlenbeck process and the reflection of light was calculated by a method similar to that of the Kirchhoff's diffraction theory. The distribution of the diffusely reflected light is given by a formula which is characterized by two constants h and β, the former being r. m. s. height and the latter being related with the average inclination of roughness peaks. The theoretical formula is well fitted with that of the experimental.View full abstractDownload PDF (935K) -
The Reforming test of the special fine drill on the rod Heat treatmentChikara SHIMO1956 Volume 22 Issue 254 Pages 135-138
Published: April 05, 1956
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSIn this report, the fine drill rod of 0.80 mm dia. was cut by an automatic lathe. The rod made of high carbon steel containing 1.001.10%C, 1.01.5%W, 0.51.0% Cr. etc. In a workshop, the rod was heated at about 850°C in the alcohol lamp flame and dropped in oil. After having tested several methods of heating, quenching and annealing of them, we found the rod stronger and straighter than before. The best method is "Austempering".View full abstractDownload PDF (678K)
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