RU2333051C1 - Drawing rolling mill - Google Patents

Abstract

FIELD: technological processes.

SUBSTANCE: invention may be used for production of encasing steel profiles from welded tubular billets by method of cold sink drawing-down. Mill contains accumulator, supply roller bed, plate with cages installed in it one after another, roller bed-kicker, mill drive and control panel. Every cage is equipped with stands that are connected by means of ties and fixed at rolling mill plate. Every stand is equipped with vertical rectangular groove on front surface and T-shaped grooves at side ends. Mill is equipped with additional hinged vertical cages with molding rollers, one of which has the possibility of centre-to-centre distance regulation between them. Hinged cages are installed with the possibility of position regulation in respect to profiling axis in vertical and horizontal directions.

EFFECT: simplification of design and mill adjustment; expansion of mill technological resources at the account of additional elements application; higher article accuracy and reduction of power inputs.

2 cl, 5 dwg

Description

The invention relates to the field of metal forming, in particular to rolling production and can be used to obtain formwork steel profiles from welded pipe billets by the method of cold flawless reduction.

Known reduction mill (DE No. 2333916 from 07/04/1973, MKI B21B 17/14), containing a number of stands with drive rolls, equipped with recesses, which are installed one after the other so that the recesses are located at an angle of 120, and in the direction of compression of the pipe with reducing the outer perimeter of the original billet due to the choice of the gap between the rolls.

A disadvantage of the known mill is the possibility of creating symmetrical deformation forces and, as a result, obtaining products of a simple axisymmetric shape.

Known reduction rolling mill (RU No. 2270067 C1, MKI B21B 17/14, publ. 02.20.2006 Bull. No. 5) containing a drive, feed roller, bed, stands and additional blocks of non-driven rollers, roller conveyor, drive, made in in the form of a number of separate kinematic chains with individual sources of torque, and a control panel.

The disadvantages of the known reduction rolling mill are the complexity of the installation of additional elements, the complex and insufficiently rigid cage design, non-optimal installation of the drive.

Known reduction mill (USA No. 3355923 from 07.23.1964, NKI class 72-224), containing a number of roll stands, an extended frame for installing stands, supporting elements on the frame, designed to secure the stands in the complexes, while the mill is equipped with means for forced separating the stands from each other longitudinally to the frame, adjusting the position of the stands with fixing in the working position using a mechanism with remote control, a device for remote transmission of drive torque to the rolls of stands, and a device for monitoring the operation of the rolls during operation.

The disadvantages of the known mill are the complex setup of the mill by adjusting the position of the stand assembly, increased energy losses and the complex structure of the mill.

The closest in technical essence to the claimed object is a multi-stand rolling mill (RU No. 2266795 C2, MKI B21B 17/04, 13/08, published on 12/27/2005 Bull. No. 36), containing stands connected by means of spindles to gearboxes, while the crate is made rectangular, and the pedestal is equipped with a pair of prismatic racks, and the mechanism for clamping the cages on the pedestal is made wedge-shaped.

The disadvantages of the multi-stand rolling mill are the complexity and unreliability of the installation and clamping of stands, the unforeseen possibility of installing additional elements.

The aim of the invention is to eliminate the above disadvantages, namely, simplifying the design and tuning of the mill, expanding the technological capabilities of the mill through the use of additional elements, reducing energy consumption.

These problems are solved in the declared reduction rolling mill for obtaining the shuttering profile by cold reduction from a hollow billet containing a drive, a feed roller, a bed with stands installed on it and located one after another, a roller conveyor, a mill drive, made in the form of a number of separate kinematic chains with individual sources of torque, and a control panel in which each stand is equipped with racks connected by couplers and fastened to the bed of the mill, while equipped with a vertical rectangular groove on the front surface and T-shaped grooves on the side ends, the mill is equipped with additional hinged vertical stands equipped with forming rollers, while one of the rollers is mounted with the ability to adjust the center distance between the rollers, and the stand is hung with the possibility of adjusting its position relative to the axis of profiling in vertical and horizontal directions, and removable built-in elements, the drive is installed with the possibility of transmitting torque coagulant uniformly and symmetrically on the stands with respect to the central unit stands block leading stand, is provided with four mill stands blocks of five crates in each block, each block being provided with an individual drive stands.

The essence of the invention lies in the fact that the supply of each stand with racks connected by couplers and fastened to the bed of the mill simplifies the design without reducing rigidity, and the installation and readjustment of the mill, and the rack is equipped with a vertical rectangular groove on the front surface and T-shaped grooves on the side ends provides reliable fastening and adjustment of the bearing units of the rolls, as well as installation with the ability to adjust or replace additional equipment, supplying the mill with additional vertical hinged and stands equipped with forming rollers, one of which is installed with the possibility of adjusting the center-to-center distance between the rollers and removable built-in elements, expands the technological capabilities of the mill to organize the optimal stress-strain state during transitions from the stand to the stand, setting up a drive with the possibility of transmitting torque evenly and symmetrically in the stands of the block stands relative to the Central leading stands of the block reduces the load on the leading elements of the drive, which allows, not increasing the total capacity of the mill, roll billets of greater thickness. The supply of the reduction rolling mill with four blocks of stands for five stands in each block with an individual drive for each block of stands is optimal for the technological process of obtaining a shuttering end profile from a tube billet.

The applicant is not aware of a reduction rolling mill for producing a profile by cold reduction from a hollow billet with the indicated combination of essential features and the claimed combination of essential features does not follow explicitly from the state of the art, which confirms the compliance of the claimed invention with the criteria of “novelty” and “inventive step”.

The present invention is illustrated by drawings, where in Fig.1 shows a General view of the mill in plan, in Fig.2 - node I of Fig.1, in Fig.3 - section A-A of Fig.2, in Fig.4 - view B of Fig. 3, figure 5 is a section bb In figure 3.

A reduction rolling mill for producing a shuttering profile by cold reduction from a hollow billet contains a storage ring 1, a feed roller 2, a bed 3 with stands 4 installed on it and located one after the other, a rolling table 5, a container for finished products 6, a mill drive 7 and a remote control control 8. Each of the stands 4 contains two racks 9, which are connected by ties 10 and have a vertical rectangular groove 11 on the front surface and T-shaped grooves 12 on the side ends. The vertical rectangular groove 11 is machined to fit and designed to mount the bearing assemblies 13 of the work rolls 14, as well as to install 4 built-in elements 15 on the stands corresponding to the technological process. T-grooves 12 provide a hitch with the possibility of adjustment of 4 additional hinged vertical stands to the required stands 16 provided with forming rollers 17, one of which is mounted on an eccentric axis to enable adjustment of the center-to-center distance 18 between the rollers 17. Mill drive 7 s will contain four individual sources of torque 19, designed to service the block 20 of five stands 4 each, from which, through a linear device 21, the torque is transmitted evenly and symmetrically to the stands 4 of the block 20 relative to the central driving stand 22 of each block 20.

Reduction rolling mill operates as follows. Welded billets - pipes from the accumulator 1 are fed to the feed roller 2, through which they are pickled in the first mill stand 4. The shaping process is performed in sixteen stands 4 and ends with calibration and editing in the last four stands 4. The built-in elements 15 and additional hinged vertical stands 16 are installed on the respective stands 4 provided by the profile rolling process. Finished products roller conveyor 5 is fed into the container 6.

Using the proposed reduction rolling mill provides a simplification of the design and setup of the mill, expanding the technological capabilities of the mill through the use of additional elements, improving the accuracy of the product and reducing energy costs.

Claims (2)

1. Reduction rolling mill for producing a shuttering profile by cold reduction from a hollow billet, containing a drive, a feed roller, a bed with stands installed on it and located one after another, a roller conveyor, a mill drive, made in the form of a series of separate kinematic chains with individual sources torque, and a control panel, characterized in that each stand is equipped with stands connected by couplers and fixed to the bed of the mill, with each stand having a vertical a rectangular rectangular groove on the front surface and T-shaped grooves on the side ends, the mill is equipped with additional hinged vertical stands with forming rollers installed with the possibility of adjusting the position relative to the profiling axis in the vertical and horizontal directions, in which one of the rollers is installed with the ability to adjust the center distance between them and removable built-in elements, and the stand drive is configured to transmit torque evenly and symmetrically across the stands eye stands relative to the central leading stand of the block. 2. Reduction rolling mill according to claim 1, characterized in that the mill is equipped with four blocks of stands for five stands in each block, each block of stands is equipped with an individual drive.

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