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4867761 Ceramic cutting tool reinforced by whiskers
New Patents
and an at least partially soluble acid. The present invention also,relates to a process and fluid product made by a certain process for cooling tools and workpieces for metal cutting, drilling, grinding and other fabricating operations comprising the steps of mixing a compound of the formula C6H4(OH)COOR, where R is selected from the group consisting of-H,-CH3,C2H5,-C3H7, and -C4H9, a ketone with a boiling point of at least about 150 degrees F., and an at least partially soluble acid, the mixture being a cooling fluid, maintaining substantial contact between the cooling fluid and an amount of transition metal or alloy containing at least one transition metal, sufficient to catalyze a reaction within the fluids during fabrication, and operating a tool while maintaining substantial contact between the tool and the fluid during fabrication.
4870560 METHOD OF CREATING NC PART PROGRAM FOR LASER MACHINING Masaki Seki, Takashi Takegahara, Japan assigned to Fanuc Ltd
vii
A method and apparatus for forming a metallic sheet having a concave-convex profile by chemical vapor deposition utilizes a die having a profiled surface defined by a number of spaced protrusions. The method comprises covering at least a portion of the profiled surface with a mask of transparent material in such a way that the mask comes into a closely adjacent relation to the top faces of the protrusions, feeding at a reaction gas of a metallic compound to a restricted space defined between the mask and the profiled surface, radiating a light beam through the transparent mask onto the profiled surface in order to decompose the reaction gas and deposit on the profiled surface a metallic layer, and removing the resulting deposited metallic layer from the profiled surface to obtain a metallic sheet having a concave-convex profile corresponding to the profiled surface of the die. The apparatus comprises a reaction chamber within which the die and the mask are mounted for making the metallic sheet by chemical vapor deposition and includes a take-up roll driven to rotate to peel the metallic sheet off the die and wind the same thereon.
Tokyo,
Based on an offset direction which indicates whether a laser beam (RB) is offset in a direction to the right side or left side of a travelling direction contained in a motion definition statement, and the direction of a curve at a comer portion (CN) of a laser beam path (bi,bi+ 1), it is determined whether an inner side or outer side of the beam path at the corner is a part (PT). If the inner side of the corner is a part, an NC part program for laser machining is created upon inserting a preset escape path (EP) in the corner portion of the beam path. If the outer side of the corner is a part, an NC part program for laser machining is created in such a manner that similarly set machining conditions prevail in preset machining condition modification intervals.
4867223 METHOD AND APPARATUS FOR FORMING A METAL SHEET HAVING A CONCAVE-CONVEX PROFILE BY CHEMICAL VAPOR DEPOSITION Syuusuke Matsumura, Hajime Kojima, Takahiro Miyano, Yao, Japan assigned to Matsushita Electric Works Ltd
4867761 CERAMIC CUTTING TOOL REINFORCED BY WHISKERS Nils G Brandt, Zeljka Senesan, Solna, Sweden assigned to Sandvik AB The present invention relates to a ceramic cutting insert containing whiskers for chip forming machining of steel and having improved mechanical, thermal and wear properties. The insert comprises besides the oxide-based matrix 5-50~ by volume, preferably 10-40~ by volume, of homogeneously dispersed whiskers of carbides, nitrides and/or borides of titanium and/or zirconium and, where applicable, solid solutions thereof. A part of the whiskers may be replaced by whiskers of silicon carbide. The properties of the composite material can be further modified by coating the whisker material with thin layers. The whiskers reinforced cutting material shows an improved toughness behaviour and resistance to thermal crack formation without having a negative influence on the wear resistance to any appreciable extent.
and an at least partially soluble acid. The present invention also,relates to a process and fluid product made by a certain process for cooling tools and workpieces for metal cutting, drilling, grinding and other fabricating operations comprising the steps of mixing a compound of the formula C6H4(OH)COOR, where R is selected from the group consisting of-H,-CH3,C2H5,-C3H7, and -C4H9, a ketone with a boiling point of at least about 150 degrees F., and an at least partially soluble acid, the mixture being a cooling fluid, maintaining substantial contact between the cooling fluid and an amount of transition metal or alloy containing at least one transition metal, sufficient to catalyze a reaction within the fluids during fabrication, and operating a tool while maintaining substantial contact between the tool and the fluid during fabrication.
4870560 METHOD OF CREATING NC PART PROGRAM FOR LASER MACHINING Masaki Seki, Takashi Takegahara, Japan assigned to Fanuc Ltd
vii
A method and apparatus for forming a metallic sheet having a concave-convex profile by chemical vapor deposition utilizes a die having a profiled surface defined by a number of spaced protrusions. The method comprises covering at least a portion of the profiled surface with a mask of transparent material in such a way that the mask comes into a closely adjacent relation to the top faces of the protrusions, feeding at a reaction gas of a metallic compound to a restricted space defined between the mask and the profiled surface, radiating a light beam through the transparent mask onto the profiled surface in order to decompose the reaction gas and deposit on the profiled surface a metallic layer, and removing the resulting deposited metallic layer from the profiled surface to obtain a metallic sheet having a concave-convex profile corresponding to the profiled surface of the die. The apparatus comprises a reaction chamber within which the die and the mask are mounted for making the metallic sheet by chemical vapor deposition and includes a take-up roll driven to rotate to peel the metallic sheet off the die and wind the same thereon.
Tokyo,
Based on an offset direction which indicates whether a laser beam (RB) is offset in a direction to the right side or left side of a travelling direction contained in a motion definition statement, and the direction of a curve at a comer portion (CN) of a laser beam path (bi,bi+ 1), it is determined whether an inner side or outer side of the beam path at the corner is a part (PT). If the inner side of the corner is a part, an NC part program for laser machining is created upon inserting a preset escape path (EP) in the corner portion of the beam path. If the outer side of the corner is a part, an NC part program for laser machining is created in such a manner that similarly set machining conditions prevail in preset machining condition modification intervals.
4867223 METHOD AND APPARATUS FOR FORMING A METAL SHEET HAVING A CONCAVE-CONVEX PROFILE BY CHEMICAL VAPOR DEPOSITION Syuusuke Matsumura, Hajime Kojima, Takahiro Miyano, Yao, Japan assigned to Matsushita Electric Works Ltd
4867761 CERAMIC CUTTING TOOL REINFORCED BY WHISKERS Nils G Brandt, Zeljka Senesan, Solna, Sweden assigned to Sandvik AB The present invention relates to a ceramic cutting insert containing whiskers for chip forming machining of steel and having improved mechanical, thermal and wear properties. The insert comprises besides the oxide-based matrix 5-50~ by volume, preferably 10-40~ by volume, of homogeneously dispersed whiskers of carbides, nitrides and/or borides of titanium and/or zirconium and, where applicable, solid solutions thereof. A part of the whiskers may be replaced by whiskers of silicon carbide. The properties of the composite material can be further modified by coating the whisker material with thin layers. The whiskers reinforced cutting material shows an improved toughness behaviour and resistance to thermal crack formation without having a negative influence on the wear resistance to any appreciable extent.