SU732049A1 - Pipe bending - Google Patents

Description

The invention relates to pipe-making, in particular, to devices for two-sided bending of pipes, namely twins. A known machine for double-sided bending of pipes includes a frame, bending units, feeding mechanisms, aligning, lifting blanks and removing a bent pipe from the bending plane, the removal mechanism is designed as a lever with a bevel and a groove hinged on the rod of a pneumatic cylinder 11. This machine It has a complex assembly for removing a bent pipe, which increases its removal time and, consequently, reduces the productivity of the machine. It is also known a device for bending pipes, including a bending mechanism with dies, a mechanism for removing a curved pipe in the form of a carriage mounted on a guide with the possibility of reciprocating movement, on which a lifting traverse with grippers and pushers 2 are placed. This device does not reliably carry out bent pipe from the bending mechanism. However, as they are not lifted from the mat. In addition, the grips of the mechanism for removing this device will not be able to secure the clamp of the bent pipe of the warhead, since they are intended only for clamping the curved pipe of the coil. The aim of the invention is to increase the reliability of the device. This goal is achieved by the fact that the device is equipped with a number, corresponding to the number of grippers, shafts, HecyuiHNHi strips with toothed sectors and a toothed rack, interacting with the toothed sectors, while the upper part of each gripper is made in the form of a fork with longitudinal slots in which the axes are fixed, fixed on the ends of the strip, and in the matrices the through grooves are made, in which the pushers are mounted. FIG. 1 shows the proposed device in two projections; in fig. 2 — node I of FIG. one; in fig. 3 2; in fig. 4 is a section A-A of FIG. in fig. 5 - capture in cut BB FIG. 3; two projections; in fig. b - view of figs. five; in fig. 7 - node II of FIG. one;

FIG. 8 is a sectional view of FIG. 7; Fig. 9 shows a pusher in two projections.

A device for bending pipes (twins) includes a bending mechanism 1 with dies 2, in the through grooves of which pushers 3 are installed, having upper ends machined flush with the surface of dies, a mechanism for removing a bent pipe in the form of a carriage 4 moving reciprocating along a guide 5 mounted above the bending mechanism 1, mounted on the carriage 4 lifting the yoke b with the drive 7, shaft 8, mounted on the shaft 8, the bar 9 and the toothed sector 10, interacting with the rack And, having a drive 12, for example, hydraulic cylinders and guides 13.

The upper parts 14 of the grippers 15, mounted on the cross beam 6 by means of the axles 16, are made in the form of forks with longitudinal slots 17, in which the axes 18 are mounted, fixed on the ends of the bar 9. The grips 15 in the lower part contain three paws machined from the inside in the size of the outer surface (according to the shape of the torus) of the bent twin pipe being removed, Depending on the number of twins simultaneously designed for removal from the machine dies, the corresponding number of grips is set on the traverse.

The device works as follows.

As soon as the twins are bent on the bending mechanism 1, the carriage 4 is moved along the guide 5 to the position above the dies 2. The bending tools of the bending mechanism 1 are separated and the tappets 3 are turned on, which move to the extreme upper position and raise the twins above the dies 2 ( Fig. 7, 8). The yoke 6 is lowered to the lower position by means of the actuator 7. The drive 12 of the toothed rack 11 is turned on, which moves along the guides 13 to the extreme left position and rotates the gear sectors 10, and together with them the strips 9, are fixed I on the shaft 8. The upper parts 14 of the clamps 15 will be diluted under the influence of the fixed the slats 9 axes 18, located in their slots x 17, and the paws of the grippers 15 converge and clamp the twins (Fig. 3). The drive 7 lifts the traverse 6 with doubles squeezed in the grippers 15, and the carriage 4 moves them to the machine for face milling and cutting to bends. The reverse stroke of the actuator 12 of the toothed rack 11 is activated, moving it to the extreme right f position. The gear sectors 10 rotate in the opposite direction, turning also the bar 9 with axes 18 fixed at its ends, which bring the upper parts 14 of the grippers 15, respectively, and the legs of the grips are separated, freeing the twins. The carriage 4 returns to its original position and the cycle repeats. The rise of the curved pipe-double over the matrix with the help of the pushers installed in the matrix slot contributes to reliably removing it and clamping the arms of the traverse with its paws, which is absent in the known device. Performance grippers with adjustable

0 clamping paws with simultaneous use of pushers, installed in the grooves of the dies, will ensure reliable removal and clamping of bent pipe doubles, and, consequently, will increase

5 reliability of the entire device with a given performance.

Claims (2)

Invention Formula A device for bending pipes containing a bending mechanism with dies and a mechanism for removing the pipe in the form of a carriage mounted on a rail with the possibility of reciprocating movement and carrying a lifting traverse with grippers, as well as pushers, characterized in that , it is equipped with mounted in the traverse in a quantity corresponding to the number of claws, shafts carrying strips with toothed sectors and a toothed rack interacting with the toothed sectors, with the upper Part of 5 each grip is made as plugs with longitudinal slots, in which axles are placed, fixed at the ends of the bar, and through dies in the matrices, in which the pushers are installed. Sources - information taken into account in the examination 1, USSR Author's Certificate of 186260, class, B 21 D 7/12, 1963. 2. USSR author's certificate  504588, cl. B 21 D 7/12, 1974. I 1 I V4 -td fig 1 / 2 Fig 8 k X J one J. J f-f Dd