The method of disassembling the connection shaft sleeve

 

(57) Abstract:

The invention can be used in various branches of industry, transport and agriculture during disassembly of the connection details type shaft-Bush, where access can be difficult. When disassembling the nut from working body exert axial forces. The working body is made of a material with shape memory effect. Efforts create the temperature influence on the working body. 1 Il.

The invention relates to mechanical engineering and can be used in various branches of industry, transport, agriculture.

Known disassembling the nodes of the nonmagnetic conductive parts in an alternating magnetic field under the influence of electrodynamic forces arising from the interaction of the paths of the currents induced in detail, the field is directed along the plane of the connector parts is perpendicular to their axis [1] .

The disadvantages of the method: applicability only to dismantle the nonmagnetic conductive parts; the need for electromagnets, which complicates the use of the method in the field.

There is a method of repressive axes of the bushings with hydraulics the supply into the chamber of a hydraulic press, and to exercise pressure on the end of the axis of the working environment, served in the coupling zone during the entire time spent on the extrusion process [2] .

The disadvantages of the method: the impossibility to use in hard to reach places for disassembly of the connection shaft bushing in the field.

There is a method of disassembling the connection shaft sleeve by application of axial force to the sleeve is transmitted to the working bodies [3].

The disadvantage of this method is that you cannot use it for disassembly connections in hard to reach places when you want to attach to detail the effort of moving large quantities.

Technical problem on which the invention is directed, is the possibility of disassembly of the connection details type shaft sleeve in hard to reach places, as well as increased efforts to unseat during disassembly while reducing the weight of the used devices.

To solve the problem disassembly of the connection shaft sleeve produced by application of axial force to the sleeve is transmitted to the working body. Efforts create the temperature influence on the working body, which is made of a material with shape memory effect.

soedineniya details type shaft-coil is produced as follows.

In the gap m between the sleeve 1 is pressed on the shaft 2, and the end surface of the structure 3 is mounted to the body 4 made of a material with shape memory effect. The thickness n of the working body 4 should be such as to ensure a gap of p required for free installation of the working body. The temperature of the end of the direct martensitic transformation of the alloy with shape memory effect should be 2-5oC above the maximum temperature, typical for this region, and the temperature of the end of the reverse martensite transformation less than 100oC. In the manufacture of the working body is set in the "memory" of its initial thickness of the n0that must be larger than m. After compression it under certain temperature and high-speed conditions up to size n and inserted in the gap m is heated working body (transmission power, pouring hot water, blowing hot air and others).

At the same time manifests the shape memory effect, which is to increase the thickness n of the working body to the original size of the t0> m. Due to the chosen gap p and the moving part 1.

The advantages of this method:

when slightly the outer diameters of the working body, respectively 100 and 150 mm, the effort to unseat can reach 200 tons, the weight of the working body is 1 kg;

ease of use in hard to reach places for disassembly durable connection type shaft sleeve in the field, because it does not require the use of additional equipment such as hydraulic press, electromagnets, the ultrasonic transducer and other

The method of disassembling the connection shaft sleeve by application of axial force to the sleeve is transmitted to the working body, characterized in that the efforts to create the temperature influence on the working body, which is made of a material with shape memory effect.

 

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FIELD: machine engineering, possibly manufacture of sealing envelopes of corrosion resistant steels of metal-plastic high-pressure bottles.

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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