SU437543A1 - Working stand - Google Patents

Description

one

The invention is directed to the field of metal forming and can be used for cross-rolling tubes.

The known working stand of the skiving shaft includes a frame with two driven working rolls mounted in it, mechanisms for setting the rolls to the feed angle and their working movement, as well as a setting device that includes a ruler fixed in the frame, shaped according to the calibration of the rolls and placed opposite to it rolling axis second guide tool.

However, the guiding device of such a working stand does not allow a significant increase in the rolling speed and the amount of critical reduction, which adversely affects the quality of rolled sleeves and tubes.

In order to increase the critical reduction of the workpiece, the proposed working stand is equipped with a crossbar mounted in the frame that can be rotated from the drive to the rolling angle, on which a second guide tool is installed, made in the form of a rotating disk, having the possibility of adjustment movement along the rolling axis relative to pinching of the rolls, and the ruler is equipped with a vibrating mechanism, with the guide disc

made with a diameter in the range from 0.8 to 1.5 of the diameter of the work roll.

FIG. 1 shows the proposed working stand, top view; in fig. 2 - the same, vertical section along the rolling axis; in fig. 3 - the same horizontal cut.

The working stand of the rolling mill includes a cast massive bed 1, in the bores of which there are drums 2 with driven working rolls 3. The cage is equipped with a mechanism for 4 converting and diluting the work rolls, a mechanism 5 for setting the rolls at the feed angle and mechanisms 6 for locking the drums. A traverse 7 is mounted in the opening of the lid to secure the upper guide disk 8, which is made with a diameter in the range of 0.8 to 1.5 times the diameter of the work roll. In the radial (vertical) direction, the movement of the yoke (disk) is carried out using the adjustment mechanism 9. The movement of the disk in the axial direction is carried out by a movement mechanism including a hydraulic cylinder 10 and lever I. The rotation of the disk to the rolling angle is carried out using the TpaiBepcbi turning mechanism, which includes an electric motor 12, a gearbox 13 with a gear wheel 14 and a gear rim 15 mounted on traverse. The drive of the disc is carried out from the electric motor 16, located on the traverse, through the gearbox 17 and the chain gear 18, equipped with a chain closing mechanism 19.

The guide bar 20 is mounted on the rod 21 of the vibrating mechanism, including the electric motor 22 and the mechanical vibrator 23. From the axial displacement, the guide line is fixed using the hook 24 and the string 25. On the pizhsh-ni chair 26 on which the inlet funnel is installed is placed. 27 and chute 28.

The device works as follows.

The workpiece 29 is fed to the entrance side of the mill into the raven / crow 27 and captured by the work rolls 3. Without moving along the helicoidal trajectory, the metal meets the guide bar 20 and the guide disc 8, which is in the rear along the | Rollers. the reversing mechanism of the traverse at a given angle of rolling. After grip is performed to reduce ovalization, the disk 8 is moved before the toe rim by means of a hydraulic cylinder 10 and a lever 11 to the front position. This adjustment of the mill caliber will provide high quality pipes according to the condition of the inner surface. In order to improve the end-of-roll-out process {eliminate flattening of the rear end of the liner due to increased ovalization), when the rear end of the workpiece deforms the deformation zone, the disk 8 moves to the rear through the rolling position by means of the hydraulic cylinder 10, which ensures a small ovalization in the outlet section of the sleeve from the guide tool . The presence of a chain drive 18 provided with a tension mechanism 19 allows the disc 8 to move in the axial direction.

The traverse reversal mechanism ensures that the disc is installed at the required roll angle and allows you to achieve the maximum possible agreement between the speeds of rotation of the disc and the movement of the metal. Vibrating the lower guide fence will reduce the forces acting on the guide tool and increase its durability.

Subject invention

Claims (2)

1. The working stand of the roll roller containing a frame with mounted in it two driving working rolls, mechanisms for setting the rolls to the feed angle and their working movement, as well as a guide device, including a stationary line, sirorofilirovanny according to the calibration of the rolls and the second guide tool opposite to the rolling axis, , in order to increase the critical workpiece, it is fitted with a frame mounted in the frame that can be rotated from the drive to the rolling angle, on which a second guide tool is installed, made in the form of a rotating disk having the possibility of adjustment movement along the rolling axis relative to pinching of the rolls. 2. Working crate according to claim I, characterized in that the guide disc is made with dia meter; in the range of 0.8 to 1.5 times the diameter of the work roll, and the guide rail is equipped with a vibration mechanism. / f Ipl / V7