RU2330738C2 - Cage of profile-bending mill - Google Patents

Abstract

FIELD: technological processes.

SUBSTANCE: cage contains two beds of open type with cross bars, axes of horizontal rollers, every of which is installed in two chucks on bearings, and adjusting screws. Cage consists of four axes, two top and two bottom cross bars, two top and two bottom adjusting screws and horizontal crosspiece in every bed, on which the top chuck is rested, being installed directly above the bottom one. All axes are installed with the possibility of independent displacement in respect to each other. The bottom screw from the drive side may rotate through the intermediate roller and conical gears from the bottom screw from the control side and synchronously with it. Horizontal crosspieces are made as detachable and are installed in corresponding slots of beds.

EFFECT: invention provides possibility of simultaneous profiling of two corrugated strips.

3 cl, 1 ex, 2 dwg

Description

The invention relates to equipment for metal forming and can be used in the manufacture of corrugated sheets on roll forming mills.

One of the main elements of mills for profiling corrugated sheets is a work stand, in which the axes of work rolls are installed, which form a moving strip. Design features of stands of such mills are described in sufficient detail, for example, in a book under the editorship of I.S. Trishevsky "Production of bent profiles (equipment and technology)", M., "Metallurgy", 1982, S. 98-102. The stands of roll forming mills are double-roll with open type beds, the vertical racks of which are connected by traverses (removable covers, which facilitates the process of replacing the rolls), through which press screws pass to move the pillows (bearings) vertically with the roll axes. Distinguish between drive and non-drive (from the control side of the mill) side of the bed.

A two-roll working stand of a forming (roll-forming) mill is known, for which, in order to compensate for the deflection of the rolls when forming the pillows of the upper roll, they are equipped with wedges rigidly mounted on their end surfaces in contact with the spherical protrusions of the slats (see AS USSR No. 712150, class B21B 13/02, B21B 31/02, published in BI No. 4, 1980). However, this stand is unsuitable for simultaneously profiling two bands.

The closest analogue to the claimed object is the working stand duo roll forming mill according to US Pat. RF №2187397, class V21D 5/06, 13/02, publ. in BI No. 23, 2002

This cage contains two open type beds with traverses, axes of horizontal rolls, each mounted in two pillows on bearings, pressure screws and is characterized by the fact that the stands of the beds have an L-shaped cross section, the upper and lower pillows are installed with the possibility of lateral movement relative to the profiling direction while mounting bolts with spherical surfaces of the heads on which the upper pillows are mounted are screwed into the lower pillows.

Known stand is also unsuitable for the simultaneous profiling of two strips.

An object of the invention is the possibility of profiling simultaneously two corrugated strips.

To solve this problem, a stand containing two open frames with traverses of the axis of horizontal rolls, each mounted in two pillows on bearings, and pressure screws, has four axes, two upper and two lower traverses, two upper and two lower pressure screws, and a horizontal the cross member in each bed, on which the upper cushion, located directly above the lower one, rests, while all the axles are made with the possibility of independent movement from each other; the lower screw on the drive side can rotate through the intermediate roller and bevel gears from the lower screw on the control side and synchronously with it, and the horizontal cross members are removable and installed in the corresponding grooves of the frame.

The essence of the claimed technical solution lies in the development of the design of the four-roll stand roll forming mill for forming two corrugated strips simultaneously, and the corrugations on them can be of different sizes and even different directions: for example, on one strip - longitudinal, on the other - transverse. This makes it possible to manufacture prefabricated slabs (“sandwiches” or cassette panels) directly at the mill, consisting of two corrugated sheet profiles fastened together along the side and end surfaces with the possible filling of the internal space with the necessary component (for example, polyurethane).

Such sandwiches have recently been increasingly used in construction as wall panels, and the presence of mutually perpendicular corrugations on them significantly increases the rigidity of the panels both in longitudinal-transverse bending and in torsion.

The proposed stand roll forming mill is schematically shown in figure 1 (view from the control side of the mill) and figure 2 (from the input side of the strips in the stand). Arrows indicate the direction of movement of the bands.

The cage will hold back two open frames: left 1 (from the drive side) and right 2 (from the control side), each of which consists of two stands 3 and 4, as well as the top 5 and lower 6 traverses connecting the stands 3, 4 and serving to accommodate the upper 7 and lower 8, 17 pressure screws. Each of the four axes 9 lying in a common vertical plane is installed in the bearings of two pillows - bearings 10, located between the stands 3, 4 of the bed. The left (in the drawing) ends 11 of the axles 9 are connected to the drive stand (not shown).

In the grooves of the racks 3, 4, horizontal crossbars 12 are fastened, which serve as supports for the lower faces 13 of the adjacent pillows 10. For adjusting the vertical adjustment, all pillows 10 are equipped with special screws 14. To the racks 3, 4 of the frame, the jaws 15 are welded, which serve to fasten the racks 3 , 4 to the foundation beams 16.

The lower pressure screws 8 (on the control side) and 17 (on the drive side) are made with bevel gears 18, which engage with similar gears 19 of the intermediate roll 20, which ensures vertical synchronous movement of these screws. This is necessary if the pressure screws are rotated manually and access to the lower screw 17 from the drive side is difficult.

To reduce the load on these screws, the cushions located under the cross members can be balanced, for example, by means of tension springs.

The crate works as follows.

Before profiling the axis of the rolls 9 (their forming typesetting elements are not shown in the drawing), they are installed in the desired position using the compression screws 7, 8 and 17 and special adjusting screws 14 to create the required roll gap (it corresponds to the thickness of the formed strip). Two strips 21 and 22 are set simultaneously in the gaps between the respective rolls, during the rotation of which the corrugations are shaped.

If it is necessary to replace (transship) the rolls by wear or when changing to a different assortment of profiles, after disconnecting the rolls from the drive, both upper traverses with pressure screws are removed and two upper rolls are lifted from the cage by ropes. Then horizontal crossbars are removed from the grooves of the struts and the two lower rolls are lifted in a similar manner. Installation (filling) of new rolls is carried out in the reverse order.

An experimental verification of the proposed stand was carried out on a roll forming mill of 0.5-2.5 × 300-1500 of OJSC Magnitogorsk Iron and Steel Works.

For this purpose, the claimed four-roll stands were installed on the mentioned mill, in which two sheet corrugated profiles with multidirectional (longitudinal and transverse) corrugations of semicircular section were formed simultaneously. The results of the experimental verification were evaluated by the performance of the stands (including the convenience of their settings) and the quality of the obtained profiles. Up to 99.6% of the obtained corrugated sheets met the requirements for their geometry and no “failures” in the work of the stands were observed. The time of transshipment of stands was in accordance with the standards adopted at this mill.

The accepted variant of moving the lower pressure screws (using bevel gears and an intermediate roll) is recognized as quite acceptable, although other options for their joint operation are possible. The roll-forming stand, chosen as the closest analogue (see above), was not tested in the experiments because of its obviously unsuitable for molding two corrugated strips simultaneously.

Thus, an experimental verification confirmed the acceptability of the technical solution found to achieve the goal and its advantage over a known object. The feasibility study performed at OJSC MMK showed that the use of the inventive stand for the production of prefabricated panels will make it possible to manufacture them on the existing mill 0.5-2.5 of the plant, provided that it is equipped with additional equipment, and production on one the mill will be much more economical than on two mills or on one, but with the separate manufacture of two surfaces of "sandwiches".

Concrete example

The profile bending mill for molding simultaneously two corrugated strips with a thickness of 0.5 ... 2.5 mm and a width of up to 1500 mm is made with four-roll stands shown in the drawing.

In each stand in the bearings of pillows, bearings are four axis of the rolls with a diameter of 160 mm; all axes are driven and move vertically independently of each other. The horizontal cross members are made with a cross section of 6000 mm ² , which ensures their necessary rigidity at a maximum molding pressure of 10 tf.

The length of the intermediate roller is 1600 mm, its diameter is 35 mm; the distance between the beds is 1550 mm, between the stands of the bed 500 mm.

Claims (3)

1. A cage of a roll forming mill, mainly for forming sheet corrugated profiles, containing two open frames with traverses, axes of horizontal rolls, each mounted in two pillows on bearings, pressure screws and a drive, characterized in that it contains four axes, two upper and two lower traverses, two upper and two lower pressure screws and a horizontal cross member in each of the left and right beds, on which the upper pillow, which is located directly above the lower one, rests, while all axes are made s with the possibility of independent vertical movement. 2. The cage according to claim 1, characterized in that the lower pressure screw on the drive side is made rotating through an intermediate roller and bevel gears from the lower screw on the side of the right frame and synchronously with it. 3. The crate according to claim 1, characterized in that the horizontal cross members are removable and installed in the corresponding grooves of the frame.

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