RU91300U1 - DOUBLE-BANDED ROLLER CART OF STAN 2XPR6-15 WITH DRIVING MOBILE CARTRIDGES, TOOTH-RACK DEVICE WITH NODE FOR CALIBRATION POSITION SETTING - Google Patents

Abstract

A twin double-strand roll stand for the 2khptr6-15 mill, comprising a movable power bed with support rails and movable cartridges, consisting of housings, work rolls with bearing supports in the pillows and axial adjustment means, characterized in that the movable cart drive is a gear rack with a knot for adjusting the position of calibers.

Description

Two-strand roll stand of the mill 2 hptr6-15 with a drive for movable cassettes, a rack-and-pinion gear with a gauge position adjustment unit.

The utility model relates to pipe rolling production and relates to the improvement of the working stand of the cold rolling mill.

Known for the working stand of the cold rolling mill 2khptr6-15, described in the book N.V. Rozov "Cold rolling of steel pipes." Moscow, Metallurgy, 1977, pp. 103, 106, Fig. 58, as well as in the book by Yu.F. Shevakin, F. Seydaliev "Cold pipe rolling mills."

Metallurgy, 1966, p. 88, Fig. 33, containing a power base, moved by a cr / w mechanism, and a movable cassette, moved by a rocker mechanism with a working tool, rollers moving along the support bars.

The principle of operation of this device is based on the deformation of the tube stock by rollers moving along the support bars with a variable cross section.

The disadvantage of this design is the low productivity of the mill due to imperfections in the working tool of the rollers and strips.

The objective of the utility model is to create a working stand for the cold pipe rolling mill, which increases the productivity of the mill and simplifies the setup of the mill.

The task is achieved by replacing the obsolete stand with a roller tool on a twin stand with ring gauges, an analog of which is a well-known stand (see AS No. 223025, class 7a, 16/01), and the working stand is the closest in technical essence, described in US patent No. 3211027, CL. 72-208, 1965 and an improved stand, patent RU 2297890 C1. A known working stand of a cold rolling mill includes a power bed with support rails, a movable cassette consisting of a housing and work rolls with bearing supports in the pillows, and means for axial adjustment of the rolls.

The disadvantages of this stand: the large size of the power movable bed and the difficulty of setting up the mill with a rocker mechanism.

The purpose of the utility model is the installation of a paired known roll stand in the bed of the mill 2 hptr6-15, simplifying the setup of the mill and increasing its productivity.

This goal is achieved by eliminating the rocker mechanism of the drive roll cassettes and replacing it with a rack-and-pinion device with a gauge position adjustment unit.

The principle of operation of this device is based on the proportionality of the estimated stroke length of the roll cassette for the double stroke of the mill stand with a rocker mechanism and with a rack and pinion device.

For explanation, a specific example of the implementation of the utility model is given with reference to the accompanying drawings, in which: Fig. 1 shows the working stand of the cold pipe rolling mill, a longitudinal section along the rolling line; figure 2 is a top view, figure 3 is a rear view.

The working stand of the cold pipe rolling mill comprises a movable power bed 1 with support rails 2 and movable cassettes 3, consisting of housings and work rolls 5.

The proposed device consists of a driven gear rack 6, fixed with one end 11 in the middle of the rear twin stands of the mill, and with the other end rests in the opening 12 of the rear housing of the stationary frame, equipped with special friction gaskets, which engage with the gear 7 sitting on the shaft 8 which is mounted by pillows with bearings 13 to the bed of the mill. On the shaft there are two more gears 9, which engage with the sliders 10, on which the tuning unit 17 is located. The gears 9 are connected at one end to the roller cassette, the other rest in the opening 14 of the rear frame body, equipped with special friction gaskets.

The proposed device operates as follows: when the stand is advanced, the driven rack 6 rotates the gear 7 with an initial circumference of 450 mm, equal to the length of the stand, which, in turn, through the shaft 8 gives movement to the gears 9 with an initial circumference of N mm, equal to the estimated travel length of the movable cassette which, in turn, transmit movement to the sliders 10 connected to the movable cartridges 3, which move in the frame 1 at a distance equal to N mm, and the rolls 5 with a working stream of variable cross section, rolling along the support rails, axis estvlyayut deformation tubes.

The tuning unit 17 consists of a sleeve 15 with a right-hand thread threaded at one end from the outside and screwed into a slider and a large left-hand thread threaded at the other end, with a pin 16 screwed into it, connected to the hinge, and fixed to the movable assembly. Rotating the sleeve in different directions, the length of the slide is extended or shortened, adjusting the initial position of the rolls relative to the movable bed, which allows the setting of the mill during rolling.

The advantage claimed in comparison with the prototype of the utility model is to increase productivity by 2; 4 times and simplifying the setup of the mill.

Claims (1)

A twin double-strand roll stand for the 2khptr6-15 mill, comprising a movable power bed with support rails and movable cartridges, consisting of housings, work rolls with bearing supports in the pillows and axial adjustment means, characterized in that the drive of the movable cartridges is a gear-rack device with a knot for adjusting the position of calibers.