SU379297A1 - PIETEYTSHMELSH ^ YUM ^ - Google Patents

Description

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The invention relates to the pipe industry.

The prior art mill comprises a movable crimping and reduction cage, a feeding mechanism, a distributing-turning mechanism associated with a turning chuck mounted in front of the pressing stand, and a blank cartridge with a pusher.

In order to reduce the angle of rotation of the vrash, the masses of the feed mechanism and thereby increase the reliability of the feed, its mechanism in the proposed mill of the reduction cage is fixed at a distance from the rotation cartridge exceeding the length of the workpiece, and the rollers are driven from mechanism.

FIG. 1 shows the proposed mill in plan; FIG. 2 - reduction cage.

The mill consists of a roller cassette / with a main drive 2 from an electric motor 3, a distributor-pivot mechanism 4 connected with 5-to-6-turn cartridges and a 7-and S-cartridge holder mandrel. The reduction stand 9 is fixed at a distance from the chuck 6, which is longer than the length of the workpiece. The drive of the rolls 10 of the reduction cage is carried out from the distribution-turning mechanism. The mill has a hydraulic pusher, made in the form of a cylinder 11,

which is fixed in the cartridge 12 of the workpiece, and the plunger 13 - in the cartridge 8 of the rod. The blank cartridge is coupled with a drive 14 of its accelerated retraction. On the table 15 downloads is located

pusher 16.

During operation, the workpiece from the loading table enters the rolling axis and the pusher 16 is fed into the zone of action of the cartridge 12. The jaws of the cartridges 8 and 12 are expanded and propel through the workpiece. After that, the cams of the cartridges are closed, and the billet is fed through the cartridge 7 under the action of a hydraulic pusher to the reduction cage 9, the rollers 10 of which turn intermittently at an angle

determined by the feed amount and adjusted by the distributor and the pivoting device 4. At the same time, the workpiece is reduced by 3-8% and at the same time intermittently moves in the direction of the roller cassette /.

The reduction stand 9 is positioned from the turning cartridge 6 at a distance greater than the length of the workpiece, thus turning the workpiece and the pipe regardless of the feed, since between the workpiece located in the reduction stand 9 and the workpiece in roller roll 1, There is a joint.

The hydraulic pusher continuously feeds the workpiece to

thereby ensuring feed stability and reducing

moments on the rollers 10 of the reduction stand 9. The re-substitution of the mill takes place on the fly, while Patro 12 is rapidly accelerated to the initial position by a separate drive 14.

Subject invention

Cold tube rolling mill, including movable crimping and reducing stands, feed mechanism, distributing rotary mechanism associated with the turn chuck mounted in front of the crimping stand, and billet cartridge with a pusher, characterized in that, the feed, the reduction cage is fixed at a distance from the chuck of rotation, exceeding the length of the workpiece, and the drive of its rolls is made from the distribution-turning mechanism.

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FIG. 2

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