Stand of channeling mill

FIELD: technological processes.

SUBSTANCE: stand for the crimped strips contains upper and lower rollers established one over another with a clearance, creating the caliber of the set configuration enclosed by conic flanges of the lower roller. Circular grooves are located on the lower roller; a body of the upper roller is executed with a rubberised surface. Thus execute an inter-roller clearance depending on depth of the grooves and width of a formed strip. Internal edges of flanges of the lower roller are inclined to a horizontal under a certain corner of 83°...85°.

EFFECT: assortment expansion of channeling mill and decrease of cost.

4 cl, 1 ex, 1 dwg

 

The invention relates to equipment for processing of metals by pressure and can be used on mills, profile, corrugated strip.

Such roll forming mills are characterized by the presence of a large number of workers stands (up to 30), containing usually two horizontal roll forming the caliber of a given configuration. The design of the stands forming mills for forming corrugated strips are described, for example, in the book Istoricheskogo and other Production of roll-formed sections (equipment and technology). M.: metallurgy, 1982, p.98-102.

As the corrugated strip are formed with corrugations facing up (to prevent injury to their peaks when driving the roller mill), the upper roller of existing stands is performed with circular grooves corresponding form (their number depends on the number of corrugations being formed in the cage), and the lower circular projections of the same shape.

Known working cage roll forming mill for forming corrugated strips, comprising upper and lower rollers, each of which is made of molding, Katusha and auxiliary elements forming rolls barrel, the diameter of the auxiliary elements less than the diameter Katusha items by a certain amount (see A.S. USSR №1381810, CL 21D 5/06 from 30.04.86). However, this crate napagod what if the production of the joined into one corrugated sheets with different directions (longitudinal and transverse) corrugations.

The closest analogue to the declared object is the cage roll forming mill, described in U.S. Pat. Of the Russian Federation No. 2056191, CL 21D 5/06, publ. in BI No. 8, 1996

This crate contains a set with a given gap of the upper and lower rollers forming the caliber of a given configuration, and is characterized by the fact that this caliber is closed by the flanges of the lower roll, which is made with conical form, is inclined to the horizontal at an angle of 78...81°. Known crate is also unacceptable for a production to be joined into one corrugated sheets with multi-directional corrugations.

The technical task of the present invention are broadening the range of roll forming mill, producing a corrugated sheet sections, and reduced manufacturing costs.

To address this problem, the cage roll forming mill for education panel-tapes of the two corrugated strips is characterized by the fact that it contains are installed one above the other with a gap "H" of the upper and lower rollers forming the caliber of a given configuration, a closed conical flanges of the bottom roller, lower roller is made with a circular grooves under the longitudinal corrugations of the lower band and upper barrel roll in contact with the tops of the transverse corrugations of the upper strip, made with a rubberized surface, thus the value mivakulova C is Zora stand equal to: H=(h+S), where h is the depth of the grooves, S - thickness of the cast strip; the inner faces of the flanges of the lower roll is inclined to the horizontal at an angle of 83...85°, the value of h=(10...40)S, and the number of grooves on the lower roll is 3...9.

The essence of the proposed technical solution is that the lower roll cage is made with circular grooves, and the upper roller with a smooth cylindrical rubberized barrel. This mijalkovic a gap of a few more double the depth of the grooves. This allows you to set the gauge, formed by the rollers, superimposed on each corrugated strip with the corrugations of the same height, but the opposite direction. The presence of conical flanges on the lower felling prevents transverse displacement of the fringes, and the selected value of the inclination of the inner faces of the flanges of the lower roll, firstly, facilitates accurate alignment of the two bands and, secondly, enables begun in the previous stands pogibko side edges of the lower strip to form a locking connection strips.

The selected value mivakulova gap involves passing through the caliber of bands only with the corrugations of the same height. The need to gammirovanie barrel upper roll due to the fact that this barrel is in contact with the top of the transverse corrugations (i.e. the contact area is very small), and it requires effort clutch is not with roller which provides a high coefficient of friction pair "rubber steel"

This makes it possible education panel, cassette, composed of two corrugated sheets.

The drawing schematically illustrates the proposed roll forming mill.

The crate contains the upper 1 and lower 2 rolls installed with a gap H=2(h+S). Barrel upper roll is made with a rubberized surface 3, and its length L corresponds to the distance L' between the bases of the conical flanges 4 of the lower roll or somewhat less. Conical face 5 of ribs inclined to the axis XX of this roll angle α=83...85°.

On the horizontal section of the lower roll is made 3...9 circular grooves 6 in the arcuate section. This roller is in contact with the lower strip 7 containing the longitudinal corrugations, and the upper roll - top strip having a closed cross corrugations 8. The side edges 9 of the setting in calibre the lower band (they are shown by the dotted line) bending the flanges 4 at a specified angle.

The height of all of the corrugations is the same and is: h=(10...40)S.

Crate works as follows.

The lower corrugated strip in all the stands at the same level, comes in caliber with simultaneous pogibli side edges at an angle α. The upper band after shaping in the previous four-roll stand transverse corrugated is using a special Pereybere roller device is lowered to the level of the lower band and the caliber is superimposed on it - is the education panel of the cassette.

If necessary, the value mivakulova gap is adjusted by moving the upper roll pressure screws of known construction (with decreasing gap increases grip the top of the roll with the band).

Experimental verification of the claimed cage carried on roll forming mill 0,5...2,5×300...1500 OJSC "Magnitogorsk iron and steel works".

To this end, the camp was established stand of the proposed design, the parameters of which were determined by the parameters of manufactured panels cassettes. The thickness of the formed strips S=0,7...2.0 mm, and the value of h joined in the stands of the corrugated strips were: h1=10·07=7 mm, h2=10·2=20 mm, h3=40·0,7=28 mm and h4=40·2=80 mm Quantity being formed of longitudinal corrugations semicircular shape was equal to 3, 6 and 9. Tried lower rollers with tapered flanges and angle α=80...88°.

The diameters of both of the rolls were the same - 350 mm; the thickness of the rubber layer on the upper barrel of the roll - 20 mm

When the above parameters rolls and α=83...85° any problems using the stand did not arise, and up to 98.5% panels tapes having a width of 1000 mm Art. 10 KP meet the necessary criteria. When α=80...82° observed mutual lateral displacement shared bands with the deterioration of the castle of their connection. P and α =86...88° had difficulty entering the lower band at the caliber that caused the stop of the mill with the need for manual transverse offset of that strip.

Crate selected as the closest analogue in the experiments were not used because of its obvious unsuitability for connecting two corrugated strips. Thus, experimental validation confirmed the acceptability found technical solutions to achieve this goal and its advantage over the known object.

According to feasibility studies conducted in the Central laboratory of JSC "MMK", the use of the claimed invention will expand the range forming mills producing corrugated sheet profiles and to reduce production costs (compared with separate forming two bands and then connecting them into a coherent whole) not less than 1.5 times.

Specific example

The cage roll forming mill has the form shown in figure 1, and is designed for strips with a thickness of 0.7 to 2.0 mm and a width of 500...1200 mm of steel with din≤450 MPa.

The diameter of both rolls - 350 mm, barrel length upper roll L=1000 mm, the thickness of the rubber layer 20 mm.

The lower roll is made 6 of circular arc grooves with h=40 mm Size mivakulova gap H=2h+S=2 (40+0,7...2,0)=81,4...84,0 mm

The size of the interior angle is the conical faces of the flanges of the lower roll to a horizontal α =84°.

1. The cage roll forming mill for education panel-tapes of the two corrugated strips, characterized in that it contains are installed one above the other with a gap "H" of the upper and lower rollers forming the caliber of a given configuration, a closed conical flanges of the bottom roller, lower roller is made with a circular grooves under the longitudinal corrugations of the lower band and upper barrel roll in contact with the tops of the transverse corrugations of the upper strip is made with a rubberized surface, thus the value mivakulova gap stands equal to H=(h+S), where h is the depth of the grooves, S - thickness of the cast strip.

2. The crate according to claim 1, characterized in that the inner faces of the flanges of the lower roll is inclined to the horizontal at an angle of α=83...85°.

3. The crate according to claim 1, characterized by the fact that the value h=(10...40)S.

4. The crate according to claim 1, characterized in that the number of grooves under the longitudinal corrugations of the lower band on the lower roll is 3...9.



 

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