SU721164A1 - Automatic line for manufacturing sharply bended pipe branches - Google Patents

Description

one

The invention relates to a pipe bending production, namely to the production of steep bends.

There are known devices for the manufacture of taps comprising a bed, a matrix, a carrier, mandrels, bending sectors and a feed mechanism 2.

The disadvantages of the known devices are that the issue of supplying blanks to the feeder is not resolved.

Closest to the proposed invention is an automatic line for the production of steeply curved bends with a diameter of 89 and 108 mm 3.

This line contains a pre-installation with a tray and a device for the manufacture of steep-curved bends with a swivel bracket and a movable sod.

However, in a known line, the billet falls on a rotating bracket during the free fall process, which in some cases leads to a loss of its orientation. This is due to the fact that between the tray and the swivel bracket there is a constructive gap larger than the diameter of the workpiece for the passage of the movable mandrel. In connection with this

manual adjustment of the workpiece is necessary, otherwise the resulting elimination will be rejected.

All this reduces the reliability of the line, as well as reduces its production.

The purpose of the invention is to increase the reliability of the line.

This is achieved by the fact that the line of the proposed construction, having a heating installation with a tray and a device for making steeply curved outlets with a swivel bracket and a movable mandrel, is provided with an additional tray hinged on the existing

5 tray, and the L-shaped lever counterweight, rigidly connected with an additional tray and interacting with a movable mandrel. The free end of the optional tray is placed on the swivel bracket.

Claims (3)

0 FIG. 1 shows the described line at the initial moment of flexible bend; Fig. 2 shows the heating installation and the mechanism for feeding the workpiece to the bending zone in the initial position. The line includes a heating installation 1 and a device for the manufacture of steep bends 2. The heating installation 1 to a device for the manufacture of steep bends consists of a frame 3 on which the drive 4, the cartridge 5, the inductor 6 and the tray 7 are mounted. The devices for making steeply bent taps 2 consist of a bed 8 with a bending mechanism located in it, which contains a matrix 9, two bending sectors 10 installed in carriers 11 and 12. In the middle part of the carrier there are sliders 13, to which a movable mandrel 14 and fixed mandrel 15, intended for straightening the inside of the billet during bending. The gear sectors of the carrier 11 and 12 are in engagement with the driving gears 16. On the base 8 there is also a feed mechanism consisting of an actuator 17 connected to the gripper 18, a two-armed lever 19, a pusher 20 and a swivel arm 21. On the tray 7 an additional tray 22 is mounted. A l-shaped counterweight 23 with a counterweight 24 is rigidly attached to the tray 22. The line works as follows. In the starting position. The movable mandrel 14 is retracted to the outermost position and, interacting with the L-shaped lever 23, locks the additional tray 22 on the swivel bracket 21, and the slider 13 of the movable mandrel 14, engages the two-arm lever 19 by means of the pusher 20, keeps the swivel bracket 21 in the original position By pressing the start button, the drive 4 of the heating unit 1 is turned on, and the workpiece from the cassette 5 is fed to the inductor 6, and the workpiece is preheated in the inductor 6 and is moved along the tray 7 and the additional tray 22 to the rotary bracket 21. The drive mechanism 17 turns on , and the movable mandrel 14 moves with the slider 13. Simultaneously with the displacement of the movable road 14, the L-shaped counterweight 23 rotates and the additional tray 22 rigidly connected with it is lifted. When the movable mandrel 14 enters the workpiece, Formation on the swivel bracket 21, the movable mandrel 13 polzushka 14 terminates interaction with the double-arm lever 19, the latter is rotated, which enables the pivot arm 21 to descend under its own weight. The workpiece is moved by the movable mandrel 14 into the bending zone bounded by the matrix 9 and the bending sectors 10. After being driven 11 and 12 are driven in the opposite direction by the driving gear 16. The bending sectors 10 mounted in the lower part of the carrier will run around the die 9 and bend the pipe billet. At the same time, the mandrels 14 and 15 will move synchronously with the bending sectors 10 and thereby prevent the deflection of the wall of the resulting retraction. As soon as the bending sectors 10 come off the branch and the mandrels 14 and 15 come out of its internal cavity, the removal under the action of its own weight is removed from the bending zone. The reverse is engaged, and the carrier 11 and 12 return to their original position, while the movable mandrel 14 engages with the gripper 18 of the actuator 17. The actuator 17 is turned on, and the movable mandrel 14 together with the slider 13 moves to the initial position. Slider 13, interacting with the two shoulders lever 19 through the pusher 20, raises the swivel bracket 21 to its original position, and the mandrel at the end of its turn, interacting with the L-shaped counterweight lever 23, lowers the additional tray 22 onto the swivel bracket 21. Simultaneously with turning on the drive 17, the drive 4 of the heating installation 1 is moved to its initial position. After the actuators 17 and 4 have moved to their original position, the actuator 4 is turned on and the cycle is repeated. The proposed line design ensures the reliability of its work and increases productivity by 5-7%. Claim 1. Automatic line for the manufacture of steep-curved taps, containing a heating installation with a tray and a device for the manufacture of steep-curved taps with a swivel bracket and a movable mandrel, characterized in that, in order to improve reliability, it is equipped with an additional tray pivotally mounted on an existing tray , and L-shaped counterbalance lever, rigidly connected with an additional tray and interacting with a movable mandrel. 2. Lines according to claim, characterized in that the free end of the additional tray is placed on the swivel bracket. Sources of information taken into account during the examination 1. USSR author's certificate number 2673P, cl. B 21 D 7/02, 1963. 2. USSR author's certificate number 541534, cl. B 21 D 7/02, 1976. 3. Information sheet VDNH USSR. Publication of the department of scientific and technical information TSNIIEP Selstro, 1978, (prototype). 721164 iJit: -; -; - -:; --- -; daM9 hy "xL