Study on the influences of the tool wear upon the change of chip type
This paper analyzes force received by chip in process of machining the stainless steel 1Cr18Ni9Ti. The force state was analyzed respectively when cutting edge wear, groove wear, boundary wear of the minor cutting edge and the groove wear occurred. Based on analyzing the effects of cutting force changes on chip type, the effect law of tool wear upon the changes of chip type was obtained. Cutting experiments were carried out and the high-speed camera and the piezoelectric force measurement instrument were used to obtain cutting force data to verify the influences of tool wear on the changes of chip type. The research results provide the theoretical foundation for solving the key technical problems of tool breakage in the automated production.
Study on Longitudinal Bend Mathematics Model of Side-curl C Shape Chip and Its Breaking Criterion
On the basis of cutting experiments and high-speed phto technique, the theoretical study on the chip-forming and breaking process of side-curl chip is carried out. The longitudinal bend mathematics model of side-curl C shape chip is t founded, which is the theoretical foundation for the mechanism study on the chip -forming and breaking process and its computer emulation.
Pioneer 10 Observations of the Ultraviolet Glow in the Vicinity of Jupiter
A two-channel ultraviolet photometer aboard Pioneer 10 has made several observations of the ultraviolet glow in the wavelength range from 170 to 1400 angstroms in the vicinity of Jupiter. Preliminary results indicate a Jovian hydrogen (1216 angstrom) glow with a brightness of about 1000 rayleighs and a helium (584 angstrom) glow with a brightness of about 10 to 20 rayleighs. In addition, Jupiter appears to have an extensive hydrogen torus surrounding it in the orbital plane of Io. The mean diameter of the torus is about equal to the diameter of the orbit of Io. Several observations of the Galilean satellites have also occurred but only a rather striking Io observation has been analyzed to date. If the observed Io glow is predominantly that of Lyman-α, the surface brightness is about 10,000 rayleighs.