SU659248A1 - Tube-beading arrangement - Google Patents

Description

elastic sleeves, spaced on the surface of the holders around the studs, limited by axial displacement of pipes, made in the form of spring sectors, mounted on the surface of the holders by ring clamps preventing axial displacement of conical studs in two adjacent parts dah, with a groove in each pin of the axis perpendicular to the axis, which includes a retainer. The clamps are made segmental cuts, the depth of which is greater than the depth of the grooves in the tires.

Improving the quality of the expansion is achieved by the fact that the rolling element under the action of radial external forces arising due to the tolerance for the distance between the tubes in the tube plate can be self-aligning in the holder due to the uni-sleeve inserted into the slot between the holder and the spike.

In addition, to improve the quality of the tube expansion on the instrument, limiters are installed, which tend to force random axial movements of the tubes due to the different thickness of the walls and the unequal strength of the weld over the length of the tube.

To fix the tools located in two adjacent rows relative to the tool holders, the device is provided with ring locks that are included in the spikes.

FIG. 1 shows a general view of the device; in fig. 2 is a cross section A-A in FIG. one; in fig. 3 - the instrument fastening unit; in fig. 4 - possible position of the tool during self-installation.

A device for flaring from two sides of a package of tubes in tube plates is a frame 1 (Fig. 1) with parallel-mounted holders 2 and 3, in which milling elements 4 (Fig. 1-3) are placed, made in the form of conical spikes. In the sockets of the holders, between thorny.mi and holder, nested elastic sleeve 5 (Fig. 3). On spikes 4 (figs. 1-3), limiters 6 (figs. 1–3) are installed, possessing spring properties. The tool 4 is fixed in the holders 2 and 3 (Fig. 1) with the help of ring clamps 7 (Fig. 1-3), which are included in the grooves of the studs 4. The ring clamps 7 are provided with segment notches 8.

During the flaring process, the assembled package of tubes is fed between the holders 2 and 3. The tubes come into contact with the spikes 4 and with further movement of the packet the holders 2 and 3 unfold, making each flaring of each tube simultaneously from the other sides.

When flaring, the tube bundle-stud system is rigid. Due to the tolerance of the distances between the tubes, the spikes are affected by radial forces. In order to reduce them in the holder's nest between the tool and the holder, elastic sleeve 5 (Fig. 3) is inserted, due to the deformation of which the spike 4. Can be self-setting during the flaring process.

When performing a package of pipes with a nomipal step, the spike takes the position according to FIG. 3. When the tube pitch deviates from the nominal tire positioning, it is self-installed in accordance with FIG. 4 due to the deformation of the sleeve 5 (Fig. 3). The self-alignment of the spike reduces the radial forces acting on it and, thus, improves the quality of the flare and increases the tool life.

The mechanical strength of the opposite ends of the tubes, especially the sutures, is different. This may be caused by the difference in thickness of the tube walls, the unequal mechanical variation of the weld, and so on. The deformation of the opposite ends of the tubes may also be different due to the different size of the protrusion of the ends of the tubes beyond the section of the tube plate, the accuracy and quality of the tool, etc.

In these cases, in the process of flaring, the tube is displaced towards a smaller force until the forces are equalized at opposite ends of the tube. If the tube displacement process is not controlled, then there may be breaks at one end of the tube, and at the other there may be no flare or the degree of misalignment of the opposite ends of the tube is different.

To prevent accidental axial displacements of the tube in tube plates as a result of deformation of its end, tires 6 (figs. 1-3) are installed to limit stops 6, before contact with them, and the nib moves, and then the flaring of the tube end stops. At the same time, limiter 6 does not prevent self-installation of the spike due to the fact that it is made in the form of an annular sector made of a material that has springs n1, and these properties.

Creation of tire 4 in holders 2 and 3 (Fig. 1) is produced with the help of ring locks 7 (Fig. 1-3), which are included in the corresponding slots on stud 4. Each clamp 7 features a mounting simultaneously of all tires 4 located in two neighboring r dah. For convenient and quick replacement of any spike 4, notches 8 are made on the ring lock 7. By turning the ring lock 7, the axis of the notch can be aligned with the axis of any tire, allowing it to be replaced without a hitch. After the spike 4 is replaced, the ring latch 7 is re-deployed in

nOviOKCHne, in which the axis of the notch does not coincide with one or two of the axes of the tenon 4, which ensures fixation of the tool.

The use of the invention makes it possible to improve the quality of flaring, increase tool life, simplify the design of the fastening tools and ensure ease of maintenance of the device when changing tools.

Formula inventions

Claims (3)

1. A device for flaring pipes from two sides in tubing boards, containing two cylindrical holders mounted in a frame on parallel shafts, but the outer surface of which is made in several rows of sockets for mounting rolling elements in the form of conical tires, different that, in order to improve the quality of the products, it is equipped with elastic sleeves installed in the slots between the holder and the milling element, placed on the surface of the holders around the shears by limiting axial movement of pipes, filled in spring-like axle sectors, and ring locks mounted on the surface of the arms, fixing the axial movement of the conical studs in two adjacent rows, each of which has a groove perpendicular to the axis in each tire to guide the clamp. 2. The device according to claim 1, that is, by the fact that in the retainers are made segment cuts, the depth of which is greater than the depth of the holes in the spikes. Sources of Information Accepted for Expertise 1. USSR author's certificate number 227949, cl. In 21D, 1968. 2.Intent of Great Britain L 1442123, cl. In 21D 41/02, 1976. 3. USSR author's certificate number 150090, cl. In 21D 39/06, 1961.