摘要:
There is provided a carbon-ceramic brake disc assembly (200) including a carbon-ceramic brake disc (210) having a first axis hole (211) in the center thereof, and a plurality of first holes (212) around the first axis hole (211), a hat part (220) having a second axis hole (221) in the center thereof, and a plurality of second holes (222) around the second axis hole (221); and a connection unit (230) connecting the carbon-ceramic brake disc (210) and the hat part (220), including bushings (231), each of which includes a head (231a), a body (231b) connecting to the head, and serrations (231c) protruding the outer surface of the body (231b) along the length of the body (231b), with a threaded hole (231d) pierced through the head (231a) and body (231b), lengthwise, the body (231b) being inserted into the first hole (212) in the carbon-ceramic brake disc (210), and the serrations (231c) being penetrated into the internal surface of the second hole (222) in the hat part (220) when forced to be inserted into the second hole (222) in the hat part (220), and a bolt (232) being inserted into the threaded hole (231d) in the head (231a) and body (231b) of the bushing (231). According to the present invention, both configurations of the hat part (220) and the bushing (231) are made simple at low cost. And penetration of the serrations (231c) of the bushing (231) into the hole (222) in the hat part (220) permits a firm connection between the hat part (220) and the carbon-ceramic disc (210).
摘要:
The present invention relates to a clutch for transmission power. The clutch for transmission power according to the present invention includes flywheel, clutch cover and clutch disk assembly positioning between the flywheel and the clutch cover; moreover, the clutch disk assembly includes a clutch facing having main body portion formed with a center hole in the middle thereof, and a contacting portion wherein one side thereof faces the friction pad at said flywheel side and the other side thereof faces the press plate of said clutch cover, and the portion facing each other between the friction pad and the press plate is made of carbon-carbon composition; a spline hub being overlapped with one side of the clutch facing wherein a spline groove is formed in the inner diameter thereof; and a connecting means for connecting the clutch facing with the spline hub. Furthermore, the clutch disk assembly and the method of manufacturing the friction substance for clutch according to the invention can improve assemblability and reduce weight by simplifying it as a single part without using shock absorbing apparatus such as coil spring or the like on clutch disk assembly. In addition, the power transmission of an engine can be improved, and also it has an effect that an automobile can start softly and slippery does not occur even at abrupt acceleration by providing with carbon-carbon composition or carbon-silicon carbide composition having excellent shock absorption function.
摘要:
There is provided a porous, carbon-containing preform, including a body (CL) of unidirectional carbon fiber fabrics (C1), and a friction layer (FL) of randomly-arranged-carbon-fiber fabrics (F1), combined with the body (CL) by a needle-punching operation. According to the present invention, it is by the needle-punching operation that the friction layer (FL) of the randomly-arranged-carbon fiber fabric (F1) is formed on the body (CL) of the unidirectional carbon fiber fabric (C1) and the friction layer (FL) of the randomly-arranged-carbon-fiber (F1) is cross-linked to the body (CL) of the unidirectional carbon fiber fabric (C1) in producing the porous, carbon-containing preform.
摘要:
The present invention relates to a method of more precisely and easily realizing cooling channels constituting a ceramic brake disk rotor. In order to achieve an object of the invention, there is provided a method of manufacturing a ceramic brake disk rotor having internal cooling channels, comprising the steps of: (a) producing loading portions 110, 210, frictional surfaces 120, 220, and vanes 300 of the disk rotor respectively through separate processes using a carbon fiber reinforced carbon-carbon composite; (b) fabricating the loading portions 110, 210, frictional surfaces 120, 220, and vanes 300 respectively produced through separate processes into one structure and (c) performing a liquid silicon-melt infiltration process for the fabricated one structure. According to the present invention, a shape of the cooling channel can be economically and easily realized, and furthermore the dimensional precision of the cooling channel is enhanced, thereby having an effect of improving the performance of the disk rotor.
摘要:
The present invention is related to a method of producing polycarbosilane by heating polydimethylsilane at low pressure within the range of 320˜450° C. using zeolite having the Si/Al or Si/B ratio of 1˜200 as catalyst. This invention uses a zeolite with the structure of ZSM-5, ZSM-11, ZSM-12, zeolite X and zeolite Y, which has the Si/Al or Si/B ratio of 1˜200, as catalyst. When polycarbosilane is produced using a specific zeolite as catalyst, Si/Al or Si/B ratio can be adjusted at any proportion, enabling acidity control of catalyst, and therefore the molecular weight of final products can be easily controlled and the product yield can be improved, compared to conventional solid acid catalysts.
摘要:
Provided is a method for refurbishing an aircraft brake disk, the method comprising: removing a worn disk from the aircraft brake disk when the disk is worn out up to a set wear amount (Step 1); filling a first mixture in a mold to be a first refurbishment height (Step 2); putting the worn disk on the first mixture (Step 3); filling a second mixture on the worn disk in the mold to be a second refurbishment height (Step 4); pressurizing the first mixture, the worn disk, and the second mixture with a press at once to prepare a molded object (Step 5); removing the molded object from the mold, and then carbonizing the molded object (Step 6); and densifying the carbonized molded object (Step 7), in which the worn disk is subjected to Steps 1 to 7 to prepare a refurbished disk.
摘要:
A method of manufacturing a carbon-ceramic brake disc of the present invention includes a first step of mixing carbon fibers with phenolic resins to produce a mixture; a second step of putting the mixture into a mold pressing the mixture by a press to produce a molded body; a third step of carbonizing the molded body; a fourth step of machining the carbonized molded body; a fifth step of coating the machined molded body with liquid-phase phenol to be cured; a sixth step of melting silicon to be infiltrated into the cured molded body that has been coated with the liquid-phase phenol; and a seventh step of grinding the molded body that has been infiltrated by the silicon. According to present invention, the cracks do not occur in the anti-oxidation coating layer.
摘要:
Disclosed is a mounting unit including a bushing having a main part having a penetration hole extending in a lengthwise direction thereof and a flange portion expanding from an upper end of the main part, a stripper bolt having a head portion, a body portion having an insert portion to be inserted into or received in the penetration hole, and a male screw-threaded portion at a leading end of the insert portion. Also disclosed is a brake unit assembled using the mounting unit that has good thermal and mechanical stability at a coupling portion between a disk rotor and a rotor hat.
摘要:
There is provided a porous, carbon-containing preform, including a body (CL) of unidirectional carbon fiber fabrics (C1), and a friction layer (FL) of randomly-arranged-carbon-fiber fabrics (F1), combined with the body (CL) by a needle-punching operation. According to the present invention, it is by the needle-punching operation that the friction layer (FL) of the randomly-arranged-carbon fiber fabric (F1) is formed on the body (CL) of the unidirectional carbon fiber fabric (C1) and the friction layer (FL) of the randomly-arranged-carbon-fiber (F1) is cross-linked to the body (CL) of the unidirectional carbon fiber fabric (C1) in producing the porous, carbon-containing preform.
摘要:
The present invention relates to a carbon-ceramic brake disc, and the present invention includes a plurality of heat dissipation holes formed in a frictional surface; a curved surface formed between the frictional surface and an inner surface of the hole dissipation hole; and a groove formed at the inner surface of the heat dissipation hole. According to the present invention, in a brake system, when brake pads press the frictional surfaces of the carbon-ceramic brake disc brake to generate braking force, frictional heat in the carbon-ceramic brake disc is effectively dissipated to the outside. That is, the carbon-ceramic brake disc is effectively cooled. Thus, the transferring of the frictional heat generated in the carbon-ceramic brake disc to a hat part is reduced, so that it is possible to minimize deformation of the carbon-ceramic brake disc and the hat part.