SU722710A1 - Apparatus for welding non-rotating pipe butts - Google Patents

Description

Section A-A in FIG. one; in fig. 3 shows a section BB in FIG. 6; in fig. 4 shows a section B-B in FIG. 2; in fig. 5 is a view along arrow D of FIG. 2 on the device from the side of the pantograph; in fig. 6 is a section d-d in FIG. 2. The device consists of a housing 1 and a base 2, equipped with a two-coordinate caliper 3, a C-shaped faceplate 4, on which an annular guide 5 with an inlet channel 6 is fixed. On the annular guide there is a mouthpiece 7, made in the form of a cochlea for guiding the wire into the weld zone and the burner assembly 8. The rotation of the faceplate 4 is carried out from the actuator 9 through the gears 10 and 11, the slider 12, the shaft-shaft 13 mounted on rolling bearings inside the housing 1, and two parasitic gears 14 which engage with crown gear The washers 4. Case 1 is connected to the base 2 by the pantograph 15, the pantograph being installed in a plane parallel to the plane of the gear wheel 11 and the faceplate 4. The connection of the case 1 to the base 2 by a flat kinematic chain of type pantograph ensures that the case rotates against the base and simultaneously move the body parallel to the axis of the electrode of the torch during welding. The burner 8 is fixed on the faceplate 4 so that the axis of the burner electrode is parallel to the slider-12 guides. The latter is fixed in the grooves of the gear 11 with the possibility of radial movement. The shaft gear 13 is fixed on the slider 12 and is mounted in the middle position coaxially to the gear wheel 11. The diameters of the initial circles of the gear shaft shaft gear 13 and the faceplate 14 are equal. Inside the base 2 there is a mechanism for tracking the welding torch 8 along the arc length, consisting of a drive 16, gear wheels 17 and 18, a two-armed lever 19, a pusher 20 and a sleeve 21. The pusher 20 is mounted on the sleeve 21 with the possibility of axial movement. The gear wheel 17 transmits rotation from the drive 16 to the gear wheel 18, which is fixed at the base 2 from axial movement and mounted on the pusher 20 by means of a thread. A double-arm lever 19 is fixed by an axis 22 on a gear wheel 11 with the possibility of rocking in a plane perpendicular to the plane of rotation of the gear wheel and parallel to the guides made on the wheel 11. The double-shouldered lever 19 with one shoulder through the cracker 23 contacts with the groove made in the slider 12, and with the other - with the end surface of the pusher 20. Between the gear wheel 11 and the shoulder of the lever 19 a spring is installed (not shown in the drawings), ensuring constant contact of the lever with end surface of the pusher 20. The filler wire feeding mechanism consists of a drive 24 mounted on a base 2, gears 25 and 26, a pantograph 27, a shaft 28, a drive roller 29, a pressure roller 30, a cassette 31 and a ring guide 5 with a mouthpiece 7. H bchatoe wheel 26 and the outer ring 32 of the pantograph 26 are formed in one piece. The shaft 28 is connected to the pantograph part 33 by means of a key 34. The gear wheel 26 is mounted on the base with the possibility of a turn. Ring guide 5 consists of two parts a and b. Part a is fastened with screws to a plate 4, and part b can be separated from part a by means of wing 35 to install the device on the joint. The device operates as follows. The device is brought to the junction of the pipelines and is installed “ka eye so that the axis of the bore of the C-shaped faceplate 4 and the axis of the pipeline coincide. Using the two-axis caliper 3, the base 2 is moved and visually clarifies the uniformity of the gap between the pipeline and the body bore, as well as the accuracy of the installation of the electrode of the burner 8 at the weld joint. With the beginning of the filing of the welding current include the drive motor 9 rotation planlayb. At the same time, gears 10 and I begin to rotate, transferring through the slider 12 rotation to the gear shaft 13, which is meshed through the parasitic gears 14 with the gear ring crown 4. Since the diameters of the initial circles of the gear shaft 13 and plate 4 are equal, synchronism is provided rotation of the faceplate with a slider, and the axis of the electrode of the burner 8 during rotation of the faceplate will always remain parallel to the guide wheel of the gear wheel 9. When the length of the welding material deviates from the specified value during the welding process and voltage at the arc gives a signal to switch the drive motor 16. The drive gear wheels are in rotation 17 and 18. The wheel 18, while rotating the base 2 causes the pusher 20 to move along the axis. Moving the pusher causes the two shoulders 19 to rotate around the axis 22. The two shoulders lever, with its shoulder interacting with the cracker 23, moves the slider 12 in the direction of maintaining the specified distance between the torch electrode and the weld joint. When the specified distance is reached, the arc voltage control unit sends a signal to turn off the electric motor of the drive 16. Later, during the welding process, when the specified arc length deviates from the norm, the cycle repeats. To weld non-swiveling pipe joints with filler wire, you must detach a part b by means of lamb 35

ring guide 5, install the device on the joint, as described above, and then fix part b in the same place. Before welding, the faceplate, from the actuator 9, is set so that the inlet of the mouthpiece 7 is located against the inlet channel 6.

The wire from the cassette 31 is inserted into the mouthpiece 7 through the feed rollers 29, 30 and channel 6. At the same time, the wire is fed with the wire feeder and the plate clockwise, at least one and a half turns of wire are laid in the ring direction. Machine prepared for welding.

With simultaneous activation of the drive 9 for rotating the faceplate and the drive 24 for the wire feeder, the wire is fed to the arc zone.

When tracking along the length of the arc, the shaft-gear 13, mounted on the slider 12, moves the shaft 28 along the slider guides, and the pantograph 27, transmitting the rotation from the drive 24 to the shaft 28, does not prevent this movement.

After the end of welding, the detachable part 6 of the annular guide 5 is removed and the device is retracted from the welded joint. Welding cycle is over.

The use of the device will eliminate manual and introduce automatic welding of thick-walled pipelines, which will improve the quality of welds.

Claims (2)

1.Catalog "Welding equipment, M., ed. NO AT, p. 174. 2. USSR author's certificate JSfo 522930, Cl. 23 K 31/06, 1974 (prototype). FIG. five AT 8 Ts