The method of obtaining compounds of covering and covered parts

 

(57) Abstract:

Usage: in mechanized production upon receipt of a pressing connection details type shaft sleeve, repair and restoration of the holes in the hull details. The inventive covered in detail in the form smertnoi sleeve is made by bending into a cylinder of sheet blanks having the shape of a parallelogram. The outer diameter of the cylinder must be less than or equal to the hole covering the details. After installing smertnoi sleeve in the hole make rolling the inner surface of the sleeve raschetnym tool. In the manufacture of sheet stock in the form of a parallelogram with an acute angle equal to 45oin the process of rolling is increased density of the junction and, therefore, increase the reliability of the connection. 1 C. p. F.-ly, 3 ill.

The invention relates to a mechanical Assembly production, in particular the production of forging connections details type shaft sleeve and can be used in engineering, for example, in the repair and restoration of the holes in the hull details.

The known method for obtaining compounds of covering and covered parts, the latter of which is made in Velky in the hole covering parts and the subsequent rolling of the inner surface of the sleeve.

The disadvantage of this method is the relatively low density of interface smertnoi sleeve that reduces the reliability of the connection during its operation. In addition, in this case, high accuracy is required in the manufacture of sheet blanks for smertnoi sleeve, which increases the complexity of the process.

The technical problem of the invention improve the reliability of the connection cover and the covered parts due to the increase of the density of interface smertnoi sleeve while simultaneously reducing the complexity of the technological process for obtaining compounds by increasing the tolerances on the dimensions of the sheet blanks for smertnoi sleeve.

The task is solved in that in the known method for obtaining compounds of covering and covered parts, the latter of which is made in the form smertnoi sleeve, including manufacturing smertnoi sleeve by bending sheet stock, the installation sleeve into the hole covering parts and the subsequent rolling of the inner surface of the sleeve, the sheet for manufacturing smertnoi sleeve carry out in the form of a parallelogram, the magnitude of the acute angle which may be 45about.

In Fig. 1 shows the connection is ocess rolling joint smertnoi sleeve.

The method is as follows.

Covered in part 1 are in the form smertnoi sleeve from pre-manufactured sheet 2 having the shape of a parallelogram, by bending it into a cylinder with an outer diameter less than or equal to the diameter of the hole covering part 3. However due to the fact that the sheet blank 2 is not rectangular, the outer diameter of a covered part 1 may additionally be provided with longitudinal relative movement of the edges AB and CD smertnoi sleeve. This fact makes it possible to increase the tolerance for the manufacture of the size l of the sheet blanks 2 and, thereby, reduce the complexity of its manufacture. To increase the strength of connection parts 1 and 3 on the inner surface of the covering part can be executed grooves 4.

Covered in item 1 is inserted into the hole of the covering part 3. Due to the forces of elasticity covered in part 1 seeks to unfold, thereby providing a press-fit it into the hole. After that make rolling the inner surface of the workpiece 1 raschetnym tool 5. Due to the fact that the line of intersection smertnoi sleeve AB is at an angle to the direction of rolling R, blithedale line of intersection of AB components of FABand FCDwhat causes longitudinal movement of the edges AB and CD relative to each other. As a result of this intensifying processes smooth the asperities on the contacting edges, which leads to an increase in the density of the joint army and to improve reliability of the connection. Longitudinal relative movement of the edges AB and CD occurs when the angle between the line of intersection of AB and the direction of rolling R = 45about. Due to the fact that the rate of longitudinal feed of the VCRRaskatov tool 5 is much less than the speed of rolling Vp, the angle having a value close to 45aboutprovides the use for the manufacture of a covered part 1, the sheet 2 having the form of a parallelogram with an acute angle equal to 45about.

Improving the reliability of connection of details in this case due to the fact that the processes of smoothing of asperities on the contacting edges of the joint smertnoi bushings are more intensively. Reducing the complexity of the technological process for obtaining compounds is explained by the reduction in the complexity of the manufacturing process sheet for smertnoi sleeve.

1. The METHOD of OBTAINING compounds of COVERING AND COVERED PARTS of the five-sheet, the installation sleeve into the hole covering parts and the subsequent rolling of the inner surface of the sleeve, characterized in that the sheet for manufacturing smertnoi sleeve carry out in the form of a parallelogram.

2. The method according to p. 1, characterized in that the sheet is performed in the form of a parallelogram with an acute angle, constituting 45o.

 

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