RU2291014C2 - Shape bending mill - Google Patents

Abstract

FIELD: plastic working of metals, possibly manufacture of bent shapes.

SUBSTANCE: shape bending mill includes row of shaping stands with horizontal rolls arranged one over another; entry and outlet guides. Mill also includes additional guides. Each additional guide is in the form of additional lengthwise corrugation on horizontal web of main corrugation and it is mounted by its end portion in turning of lower roll of last stand for shaping lengthwise corrugation with possibility of regulation by height. End portion of guide is spaced from axis of said roll to side of previous roll by distance consisting of 0.01 of its radius or more.

EFFECT: improved quality of shapes with additional corrugations on horizontal webs of main corrugations due to elimination of distortion of contour of leading end at piecewise profiling.

4 dwg

Description

The invention relates to the field of metal forming and is intended for use in the manufacture of bent profiles with additional longitudinal corrugations on the horizontal walls of the main, mainly trapezoidal, corrugations in the rolls of a section-bending roll forming mill.

It is known that in the manufacture of bent corrugated profiles with additional corrugations on the horizontal walls of the main corrugations, a profile bending mill is used for the production of sheet corrugated products (Pat. RF No. 2048226, p.10, B 21 D 5/06, decl. 12.05.92, publ. 11/20/95).

The group of the main working parts of the roll reinforcement of the roll forming mill includes input, intermediate and output reinforcement (Production and use of bent sections of rolled products. Handbook edited by I.S. Trishevsky, M .: Metallurgy, 1975, p. 173-176) .

Introductory fittings are designed to accurately direct the front end of the strip into the caliber and to keep the strip from stalling, twisting and shifting along the width of the caliber.

The outlet fittings are designed to guide the strip emerging from the rolls, avoiding its bending. The working parts of the outlet fittings installed at the exit of the finished profile from the last pair of work rolls should approach the rolls at a distance equal to half the thickness of the workpiece.

The use of outlet reinforcement for piece profiling is especially important, since in piece profiling due to reverse elastic recoil (springing), the parts have a longitudinal bend, that is, a distortion in the shape of the front and rear ends.

Known roll forming mill containing a number of forming stands with horizontal rolls placed one above the other, input and output wiring (US Pat. RF No. 2071851, 21 D 5/06, decl. 24.11.94, publ. 20.01.97) . Input and output wiring made roller.

The disadvantage of this roll forming mill is that with the piece production of profiles, the front end of the profile is inevitably distorted, the formation of the so-called “beak”, which cannot be fixed in the line of the roll forming mill.

The closest in technical essence is a roll forming mill containing a number of forming stands with horizontal rolls placed one above the other, inlet and outlet wires (US Pat. No. 2029645, B 21 D 5/06, application. 01.02.93, publ. 27.02 .95 g.).

The input and output wiring are made in the form of tables with movable guides mounted on the ends of the frame on which a number of forming stands are installed.

A disadvantage of the known design of the roll forming mill is that it does not provide a high-quality profile, since with piecewise profiling of the sheet blank, the shape of the front end is distorted, and the design of the output wiring in the form of a table with movable guides does not fix additional corrugations on the horizontal wall of the main corrugations of the profile during its calibration and exit of the profile from the last stand.

The distortion of the front end of the profile formed in the stands forming additional corrugations on the horizontal walls of the main corrugations is not corrected with further profiling and remains on the finished product.

The objective of the present invention is to create a roll forming mill that improves the quality of profiles with additional corrugations on the horizontal walls of the main corrugations by eliminating the distortion of the shape of the front end when piece profiling.

The task is achieved in that the roll forming mill, comprising a number of forming stands with horizontal rolls placed one above the other, input and output wires, according to the invention is equipped with additional wires having the shape of a longitudinal corrugation on the horizontal wall of the main corrugation, installed at its end in the groove of the lower roll of the last forming corrugations of the stand with the possibility of height adjustment, while the end of the wires is removed from the axis of the roll of the last forming corrugations of the stand in the direction of the previous roll at a distance equal to ≥0.01 radius of this roll.

Such a constructive implementation of the roll forming mill will improve the quality of the profile by eliminating and correcting the defects of the front end of piece profile billets due to the fact that each additional wiring, having the shape of a longitudinal corrugation, allows you to get a bending moment in the section of this corrugation, which ensures straightening of the front end of the profile.

It was experimentally established that the location in the roll groove of the end of the additional wiring from the roll axis of the last stand forming a longitudinal corrugation in the direction of the previous roll at a distance equal to ≥0.01 of the roll radius ensures a reliable profile direction to the subsequent stand, which eliminates the front end distortion.

If the distance is less than 0.01 roll radius, then the required profile quality is not ensured.

To explain the invention, a specific embodiment of the invention is provided below with reference to the accompanying drawings, in which:

figure 1 shows a roll forming mill;

figure 2 is the same in plan;

figure 3 is the same, a section aa in figure 1;

figure 4 is the same, view a in figure 3.

Roll forming mill consists of a number of forming stands 1, lead-in wires 2, lead-out wires 3 for receiving profiles with periodic longitudinal corrugations and additional wires 4 having the shape of a longitudinal corrugation 5 on a horizontal wall 6 of the main corrugation of a trapezoidal shape. Input wires 2 and output wires 3 are installed respectively at the first and last forming stands 1. Additional wires 4 are installed with their end in the groove of the lower roll 7 of the last forming longitudinal corrugation of stand 1 with the possibility of height adjustment, for example, by means of gaskets 8. The end of wire 4 is removed from the O-O axis of the rolls 7 and 9 of the last forming corrugation stand in the direction of the previous roll at a distance Δ equal to ≥0.01 radius R of the roll. To install wiring 4 at this distance, for example, an adjustment screw 10 is provided.

The mill works as follows.

The sheet 11 of a certain (predetermined) length is fed to the input wires 2, where it is oriented along the axis of the mill and enters the forming stands 1. In the driving forming stands 1, the sheet 11 is gradually formed from the stand to the stand to a predetermined profile. After forming the horizontal wall 6 of the main corrugation and forming on it an additional corrugation 5, the front end of the profile is edited in the additional wires 4. After exiting the additional wires 4 and final molding, the finished profile is fed to the output wiring 3 and removed from the mill line by any known method.

The proposed roll-forming mill in comparison with the known ones allows improving the quality of profiles with additional corrugations on the horizontal walls of the main corrugations.

Claims (1)

Roll forming mill containing a number of forming stands with horizontal rolls placed one above the other, input and output wires, characterized in that it is equipped with additional wires, each of which has the form of an additional longitudinal corrugation on the horizontal wall of the main corrugation and is installed with its end in the groove of the lower roll the latter forming a longitudinal corrugation stand with the possibility of height adjustment, while the end of the wiring is located from the axis of the said roll in the direction of the previous roll at Toyan equal ≥0,01 its radius.

Images