SU1243936A1 - Method of deforming broaching of elongated cylindrical articles - Google Patents

Description

The invention relates to devices for treating holes with deforming pulling, in particular for machining holes in long thin-walled parts (L / do-6) according to an extension scheme.

The purpose of the invention is to improve the machining accuracy by making an edit of the part during the pulling process.

FIG. 1 shows a general view of the device during the distribution of parts; in fig. 2 - an additional element; in fig. 3 is a section A-A in FIG.

The device (Fig. 1) consists of a rod 1, on which the deforming elements 2 and 3 are mounted, fixed on the rod by means of a nut 4 and lock nuts 5. A rod 1 is connected with a working tool of a pulling machine 7 by means of crackers 6. Also included is a support 8 serving to secure the part. 9 by pulling it out for stretching. On the rod 1 an additional ment of 10 conical shape is installed. This element is mounted on the rod with possible relative axial movement. It faces with a smaller base in the direction opposite to the direction of pulling. The diameter of the smaller base of the conical element 10 is smaller than the internal diameter of the part 9, which ensures the interaction of the outer surface of the additional element Yu with the inner surface of the part 9. The angle of the tilting conical element is 1–2 times, which improves the basing of the part on the element 10. removing compressed air from the cavity formed by pulling the part, longitudinal grooves 1 are made on the outer surface of the element 10.

The device works as follows.

Part 9 end, made in the form of a flange, is fixed in the support 8.

The rod 1 with the deforming elements 2 and 3 through the part 9 with the help of the crackers 6 is fixed in the working part of the machine 7, Additional

5, the element 10, placed on the rod with the possibility of axial movement, enters the part 9 with its smaller base, concentrating it rod 1, its conical surface,. When axial load is applied to the rod 1 through the working body of the pulling machine 7, the elements 2 deform and 3 start- distribution of details 9, B, as a result of the action of external

 These factors (initial difference of part, possible base errors, etc.) that distort the j-symmetry of the deformation, loose end of the part tends to bend. In this case, the additional element 1-0 begins to perform its functions. Located concentric to the rod 1 and, interacting simultaneously with it and the inner surface of the part 9, it prevents the curvature of the free end of the part 9, i.e. on the side of the rod, a moment is created that prevents curvature. So-as when processing

30 thin-walled parts, the stiffness of the rod is higher than the stiffness of the part, regardless of random factors, the suitability, the axisymmetry of the deformation, the processed part does not distort.

35 In the process of dispensing, air from the cavity between the additional and deforming elements comes out through longitudinal grooves made from the outer surface of the additional

4Q element. At the end of the working stroke, the deforming element 2, with its end face, moves the additional ehgement IO along the rod and frees the part 9.

45,

The application of the proposed device allows to reduce the curvature of the machined parts, which will reduce u; x scrap on the curvature.

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Editor I. Segl Nick

Compiled by V.Kuznetsov Tehred I.Popovich

Order 3752/15 Circulation 740 Subscription

: VNIIDI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, Projecto st., 4

Proofreader E. Sirohman

Claims (1)

DEVICE FOR DEFORMABLE STRETCHING OF LONG-DIMENSIONAL CYLINDRICAL. DETAILS, containing a support for fixing the part and a mandrel with de- motionlessly mounted on it; forming elements, which is related to the fact that, in order to increase the machining accuracy by correcting the part during drawing, the device is equipped with a conical supporting element mounted with the possibility of axial movement on the mandrel in front of the deforming elements and facing with a smaller base in the direction of the latter, and longitudinal grooves for removing compressed air are made on the surface of the conical jg element. SU <„, 1243936