SU1523220A1 - Arrangement for flanging tubular billets - Google Patents

Abstract

The invention relates to the processing of metals by pressure and can be used in the preparation of flanges at the ends of pipes. The purpose of the invention is the expansion of technological capabilities by increasing the range of processed tubular blanks. The device comprises a flanging punch mounted on movable parts of the press. The flanging punch is made in the form of a central rod (TSS) 5 with inclined radial grooves on the end face and spring loaded tg (T) 3 in these grooves with bevels 11 on the end face. When the working stroke of TsSh 5 contacts with an inclined platform 8 of the groove 7 with a bevel 11 at the end of T 3. The protrusions 10 T 3 deform the end of the tubular billet 9 and distribute it, and during the further course of Tsh 5, flap. 4 il.

Description

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The invention relates to the processing of metals by pressure and can be used for flanging pipe ends.

The purpose of the invention is the expansion of technological capabilities by increasing the range of processed tubular blanks.

FIG. 1 shows the device, operating and initial position; in fig. 2 is a view A of FIG. one; in fig. 3 - central stock, axonometrics; in fig. 4 - t ha of punch Yu distribution, axonometrics.

The device contains a matrix 1, body 2, ti gi 3 with springs 4 and central

stem 5. In case 2 there are radial ",, ,,.," ", -,,

directional grooves 6, in which f are placed

ti 3 and springs 4. In the central rod (3-2) c.osa), ke 5 has grooves 7 with inclined pad, hells 8.

The central rod 5 is oriented with its grooves 7 to the grooves 6 of the housing 2 and tam 3 so that 2 plugs 3 protruding from the housing 20 enter the grooves 7 of the central rod 5 during the working stroke and press the springs 4 to the inclined platforms 8 grooves 7. Pipe billet 9 is installed as far as it will go to the surface, with t g 3 and fixed by the inner surface along the projections 10 t g 3. One of the possible forms of the central brush 5 and the plug 3 is shown respectively in FIG. 3 and 4. In FIG. 2 the grooves 7 are visible, in which the protrusions are 10 t g 3..30

The device works as follows.

During the working stroke, the central stock 5, in contact with the inclined platform 8 of the groove 7 with the bevel 11 at the end of the rod 3, radially moves it along the groove 6 of the housing 2, compressing the spring 4. The projections 10 35 are thin, containing the body

opportunities in the processing of billets, as well as products with thickenings on the end

Example. The original pipe has the following dimensions in d - internal diameter (45 barrel diameter (50 mm), mat - St. 3.

During the process of distribution with the tool on the wall of the zagot, the maximum compressive work done by the expression

ar "a". a, (1 + (-1) + L

where ffj is the yield stress — coefficient of friction, taper; Ru 30; walls, Q 2.5.

Substituting these values we get

ork-225.5 MP

This is the meaning of the arm wrinkle formation in the cooking wall. When dispensing the end of the feed, the compressive stresses and therefore the possible formation of the wall of the workpiece is eliminated.

Claims (1)

Formula invented device for flanging The gi 3, which are supported by the wall of the pipe billet 9, deform it by dispensing according to the matrix 1. The uniform distribution of the billet 9 is ensured by the uniform location along the perimeter of the die 1 t g 3. Eight t g 3 in this device ensure the specified quality of the product. At the end of the working stroke, the brush 5 calibrates with its end surface the flange of the billet 9 according to the matrix 1.dz The device dispenses the end of the pipe without axial backpressure, which significantly expands the technological flanging punch and media are characterized by the fact that, from the technological possibilities of increasing the range of pipe blanks, the punch is mounted in the form of a central bar, which is evenly perpendicular to the oblique radial flanges in these grooves with bevels on the end face; for dispensing protrusions placed on the bars from the side of the matrix. „,,.,„ „, -,, f opportunities in the processing of thin-walled billets, as well as billets with thickening at the ends. Example. The original pipe billet has the following dimensions at the distribution point: d - inner diameter (45 mm), D - outer diameter (50 mm), the material of the workpiece - Art. 3 During the process of dispensing with an existing tool, the maximum compressive stress, determined by the expression ar "a". a, (1 + (-1) x (3-2) c.osa) where ffj is the yield stress, ZOOMPa is the friction coefficient, 0.1; ot- taper angle; Ru 30; Q - wall crowd, Q 2.5. Substituting these values into the formula, we get RMS-225.5 MPa. Such an arm value can lead to wrinkling in the wall of the tube stock. When dispensing the end of the billet, there is no compressive stress and therefore the possibility of folding the wall of the billet is eliminated. ok containing body Claims Device for flanging pipe pins, comprising a body matrix, flanging punch and dispensing means, characterized in that, in order to expand technological capabilities by increasing the range of billets to be machined, the flanging punch is made in the form of a central rod, on the end of which evenly perimeter radial grooves are made, and These grooves are spring-loaded t g with bevels on the end, installed with the possibility of contact with inclined grooves, and the means for distribution is made in the form of protrusions placed on the spring-loaded rods from the side Ritsa. BtfdA FIG. fzg.1