The method of connection of details type shaft sleeve fits

 

(57) Abstract:

The invention relates to mechanical engineering and can be used in connection with tightness details type shaft sleeve by means of hot pressing. To the end of the shaft secures the technological core on which is mounted a heated guide sleeve. The sleeve is heated and the guide sleeve is slid onto the shaft. The result is improved reliability of the connection process components, and the quality of the obtained press-fit connection. 1 Il.

The invention relates to mechanical engineering and can be used when performing operations Assembly parts type shaft sleeve, in particular when using hot pressing.

There is a method of Assembly of parts with tension-type shaft sleeve by heating the covering part (Berniker E. L. Landing with tightness in mechanical engineering.- M.-L.: engineering, 1966, S. 132).

There is a method of joining parts with tension.with. N 95588074, B 23 P 11/02, 1981), which consists in applying to covered detail of the cover of the fuse metal with its subsequent melting.

Closest to the proposed technical solution.with. N 749615, B 23 P 11/02, 1978, taken as a prototype, in which pre is an interstitial element in the form of fusible metal in the Assembly process. The disadvantage of this method is the complexity of the setup operations on the sleeve of the heater, causing the intermediate element, remove the heater and the intermediate element. In addition, when the complex configuration of the outer surface of the sleeve becomes problematic installation of the heater, causing the fusible metal and its subsequent removal.

The technical task of the invention is to improve the reliability of the connection parts and the quality of the press-fit connection.

The technical result is achieved in that the connection of the parts type shaft sleeve comprising heating the covering sleeve and install it on the shaft, to the end of the shaft secures the technological core on which is mounted a heated guide sleeve.

The reliability of the process of hot pressing is achieved by centering the sleeve relative to the shaft and eliminate the possibility of reducing the landing clearance to zero during installation of the sleeve on the shaft, the link is provided with the ability to assemble parts without burrs on the mounting surfaces.

The drawing shows the arrangement of parts when the SRB is yavlyaetsya heated guide sleeve 3, through which the shaft 1 starts the heated sleeve 4. After fitting sleeve 4 the guide sleeve 3 and the technological terminal 2 is removed. Sleeve 4 and the guide sleeve 3 is heated in the furnace and removed from the furnace at the same time. The sleeve 4 is heated, for example, up to 250oC, the guide sleeve 3 - 150-200oC.

The use of heated guide sleeve allows you to center the sleeve relative to the shaft, to create the direction of movement of the sleeve in the process of pressing and support created by the heating of the sleeve landing clearance, and hence to reduce the pressing force, to eliminate the possibility of setting mating parts to avoid burrs on the mounting surfaces.

Thus, the present invention can improve the reliability of connection of the parts and to ensure the quality of the press-fit connection.

The method of connection of details type shaft sleeve with an interference fit comprising heating the covering sleeve and install it on the shaft, wherein the shaft end is fixed technological core on which is mounted a heated guide sleeve which is slid onto the shaft sleeve.

 

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SUBSTANCE: method comprises steps of separately making metallic convex bottoms with cylindrical collar and backing ring. Thermal expansion factor of backing ring exceeds that of bottoms; outer diameter of backing ring provides close fit of bottoms onto it at 20°C; cooling preliminarily assembled backing ring with bottoms until cryogenic temperature; sliding bottoms on backing ring in cooled state until mutual touch of cylindrical collars of bottoms; heating assembly up to 20°C in order to provide close fit of backing ring in cylindrical collars of bottoms; welding bottoms along butt of assembly and then removing backing ring by chemical milling.

EFFECT: simplified process of making envelopes with enhanced mass characteristics.

2 cl, 4 dwg, 1 ex

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