SU423532A1 - DEVICE TO TURN THE DRUM MILL OF CROSS-SCREW ROLLING - Google Patents

Description

one

The invention relates to the field of rolling, in particular to devices for rotating a helical rolling mill drum.

A device is known for rotating a helical rolling mill drum, comprising a drum with a ring gear, a gear shaft mounted in the shaft and a drive for its rotation.

A disadvantage of the known device is the impossibility of adjusting the angle of feed of the rolls during the rolling process, since such adjustment should be carried out at higher drum rotation speeds due to the low rolling masking time. Increasing the speed of rotation of the drum leads to a decrease in the installation accuracy of the roll at a certain feed angle when setting up the mill.

In order to twist the drum during the rolling process, the proposed device is equipped with an additional drum rotation mechanism, made in the form of a swinging hydraulic cylinder, which is pivotally connected to a swinging lever rigidly mounted on the end of the shaft-scissors gear, and the shaft-gear shaft connection with the drive is made in the form of a cam clutch, the grooves of which more of its protrusions pas value of the additional angle of rotation of the drum.

FIG. 1 shows the device described: FIG. 2 - the same. A-.A cut. in fig. 1. A device for rotating the helical rolling mill drum contains a drum 1 with a gear ring 2, a shaft-shaft 3 which engages with it, is split into a staple 4, and a rotation drive thereof including a motor 5 and a reactor 6. In addition, the device contains a mechanism for additional rotation of the drum, made in the form of a swinging hydraulic cylinder 7, hingedly connected with a rotary lever 8 fixed at the end of the shaft-shchestrenny 3 connected to the drive through cam

the clutch 9, the grooves of which more than its protrusions on the value of the additional angle of rotation of the drum 1.

The cams placed on the lever 8, the cams placed on the coupling 9 are made with a lateral angular clearance allowing the shaft-shaft 3 to rotate relative to the gear 6 at an angle y, which corresponds to the maximum required angle of the additional rotation of the drum.

Setting the mill to a specific non-downward angle of the feed. for example 10 °. the product is produced by turning the drum 1 at a reduced speed through the electric motor 5 through the gearbox 6, the cam coupling 9, the tester shaft 3 and the gear ring 2 mounted on the drum.

After adjustment, the rod 10 of the hydraulic cylinder 7 is set to the position fixed by the adjusting nut 11, at which the front and rear ends of the workpiece are rolled at lower roll feed angles.

To dry the rolling of the middle part of the billet at increased feed angles of the rolls, for example 18 °, during the rolling process, drum 1 is rotated at an increased speed by an additional angle by not spinning the rod 10 of the hydraulic cylinder 7 to the left position at which the rod 8 rotates the gear shaft 3. The magnitude of the angle of the additional rotation of the drum is determined either by the contacting of the cams of the coupling 9 (the maximum possible angle), or corresponding to them;

nuts 12 (reduced value of the angle of additional rotation).

Subject invention

A device for rotating the helical rolling mill drum, including its drum with a ring gear, entering the gear wheel mounted in the frame, and driving it into a shaft, characterized in that, in order to twist the drum in the rolling process, it is equipped with a mechanism for additional rotation of the drum, made in the form of a rocking hydraulic cylinder, pivotally connected with a pivoting lever fixed at the end of the shaft-gear, and the connection of the shaft-gear with a drive is in the form of a cam clutch, which grooves oh greater its projections on the value of the additional angle of rotation of the drum.

ig.1

/ I-l

/