Shape bending mill roll

FIELD: rolled stock production, possibly manufacture of cold bent rolled shapes.

SUBSTANCE: roll includes arbor with diameter d having flange, shaping members with predetermined rolling diameter D and unit for securing them to arbor. Said unit is arranged at side of mill drive and it includes cylinder-cone locking ring mounted on arbor and three stops equally spaced one form other and secured to arbor by means of bolts. Stops have upper and lower cylindrical surfaces whose diameters are equal respectively (0.7- 0.8)D and d. Lateral surfaces of stops are parallel to roll axis; their end surfaces are normal relative to roll axis. Generatrices of inner cylindrical surfaces of stops turned to shaping members are inclined by angle α = 68 -70° to roll axis and they engage with cone surface of locking ring whose generatrix is inclined by angle α to roll axis.

EFFECT: enhanced quality of bent shapes due to their improved geometry, lowered costs of production process.

2 dwg, 1 ex

 

The present invention relates to rolling production and can be used in the manufacture of cold-formed profiles of rent.

Bent shapes (rolled and corrugated sheet) are made on mnogoluchevykh mills, the main tool of which are forming (working) rolls mounted in the stands Duo. Typically, these rolls are made integral, i.e. on the axis of the ring onto the dowels individual forming elements forming the roll barrel. For fastening members on an axis with one side usually has a flange, and on the other, securing (locking) the node. The modern design of the forming rolls is described, for example, in the book edited by Istoricheskogo “Production of roll-formed sections (equipment and technology)”, M, “metal”, 1982, s-364.

Known banded work roll forming mill, the barrel of which consists of two halves, with a connector between them in the middle of the barrel, where is the shoulder, and the two halves are drawn together into a single unit by bolting (see jap. Pat. CL 21, No. 48095 from 04.12.72). Also known instrument (roll) roll forming mill comprising upper and lower rollers, each of which is made in the form posted on the shaft profile washers and profile sleeve, the latter being mounted on the shaft on bearings (with the. A.S. USSR, class B 21 D 5/06, 21 In 1/08, No. 388811 from 14.12.73).

The disadvantage of forming rolls is the relative complexity of their design, which increases the cost of production, and the possibility of some increase in the width of the roll caliber after prolonged use (due to looseness forming elements)that affects the geometry of the finished profiles.

The closest analogue to the declared object is a roll forming mill, described in the book Spheresensor “Production of roll-formed profiles. M, metallurgy, 1985, p.21 and Fig.6.

This composite roller includes a shaft (axis) with the ribs and forming the elements with a given katusin in diameter and is characterized by the fact that he has two of the mount, each of which contains a split sleeve, a nut, a locking plate and screw this level.

The drawback of this design of the roll is its relative complexity (presence of two attachment points), as well as difficulties, if necessary, compression molding elements along the axis of the roll due to the weakening of the fastening elements, which occurs after prolonged use of the roll and the ingress of foreign particles (e.g., scale with molded stripes) in the connectors between the individual elements of the barrel.

The technical task of the invention is to improve the quality of bent pros who she is by improving their geometry and reduced production costs.

To solve this problem in the roll forming mill containing the axis of the diameter d of the flange, forming the elements with a given katusin diameter D and the site of their mounting axis, the said site is located on the drive side of the mill and is made of a cylindrical-conical retaining ring, placed on the axis and three brakes, equidistant from each other and fastened to the axis of the bolt, with the upper and lower cylindrical surfaces, the diameters of which are equal, respectively (0,7...0,8) D and D, side surfaces of the stoppers parallel to the axis of the roll, and the outer end surface perpendicular thereto, thus forming the conical inner surfaces of the stoppers facing the forming elements at an angle of α=68°...70° to the axis of the roll and in contact with the conical surface of the locking ring, forming inclined to the axis of the roll is also at an angle α.

These correlations are based on the results of the experiments are empirical.

The essence of the proposed technical solution is to simplify the attachment (and the whole structure), and the ability to create axial forces acting on the forming elements of the roll, which provides a constant width caliber, even after prolonged use of the tool. Indeed, the swath is selected as the closest analogue (see the ISE), made two mount - left and right. For compression molding elements necessary to remove the retaining bracket and put the nut in contact with remote elements, in such a position, when the retaining strap is identical to the “flats” on the nut, and then tighten the screw of the strap.

We offer same roll an increase in the width of the caliber enough to “tamper” with the set screws, which, when it moves down, squeeze forming elements, reducing the width of the gauge. Moreover, this operation is most convenient for staff side: drive side of the mill.

The design of the inventive roll schematically shown in figure 1, and figure 2 - view of the stopper.

Axis 1 roll (1) is made with a shank 2 (the drive - in figure 1, left), with two pins 3, which are mounted in bearings with flange 4 and section 5 for mounting three stoppers 6. Axis 1 is installed the dowels forming elements 7 forming the roll barrel and is made with katusin diameter D.

Each stopper abuts with its inner working surface 8 in the conical surface 9 retaining ring 10 and is attached to the axis by means of a bolt 11. The stoppers is removed from each other (through 120°).

Side 12 and the end 13 of the surface of the stoppers (2) flat and perpendicular to the horizontal plane. The top 14 and bottom is I 15 surface - cylindrical with diameters of, respectively, equal to Dc=(0,7...0,8) D and Dn=d and the working surface 8 of the stoppers in contact with retaining ring 10, is tapered. To the surface of the stoppers contact 16, the diameter Dc of the stopper, it is advisable to make a few more (5...8%) maximum diameter D retaining ring. The result is reduced wear of the contact surfaces as stoppers and rings.

After set on the axis of the forming elements of the roll arresters are installed, through openings 17 which pass clamping bolts 11; the rotation of the latter by the movement of blocks down to the section 5 of the axis of the roll), simultaneously causing the appearance (in contact with retaining ring) axial effort T, tightening forming elements 7.

Experimental validation of the proposed roll carried on roll forming mill “0,5-2,5” complex new technologies OJSC “Magnitogorsk iron & steel works”.

In the experiments varied the number of blocks (2 to 4), the angle αand magnitude of the diameter Dc. The best results (the output of quality products to 99.6% with a minimum cost of manufacture and operation of the instrument were obtained with the use of rolls of the proposed design.

If there are two stoppers fastening forming elements on the axis of the roll was not sufficiently reliable, analicia four brakes did not improve the performance characteristics of the roll, but several raised its price (and production costs). Increasing the angle α to 71°...80° does not impact on the reliability of the fastening elements, but led to the need to increase the diameter D retaining ring (see figure 1) to provide the desired horizontal movement of the elements barrels (axial compression).

When α=60°...67° in some cases, there were “opening” of elements on the axis, which would worsen the geometry of the profiles. In addition, when reducing α increasing the tightening force of the bolts.

The decrease in Dc (0,69 0,5...) D resulted in a decrease in the height H of the stopper, i.e. to its weakening, which in some cases after prolonged use of the roll and great effort tighten the clamping bolts caused the destruction of the stopper, and in addition, accelerated wear of the working surface. At DB>0,8D performance brakes and durability, virtually no improved, but increased the cost of the roll.

Control the profiling rollers, taken as the closest analogue, gave a yield of quality profiles within 96...98%, and the cost of manufacture and operation of these rolls were larger, on average, by 12%. Thus, experimental verification has confirmed the advantages of the roll of the proposed design and its suitability to achieve the goal.

According to the Central is aboratory control of OJSC “MMK” the use of the claimed object on roll forming mills plant will reduce the cost of roll-formed profiles by reducing labor costs and improving output quality of hire not less than 4%.

Specific example

Roll for profiling corrugated sheets of thickness 0.5...1.5 mm and width up to 1300 mm has the design shown in figure 1. The fastening elements of the barrel with lock ring and three stoppers (see figure 2).

The main parameters of the roll:

D=300 mm, d=100 mm; Dc=0,75 D=0,75×300=225 mm; maximum diameter of retaining ring - D=0,94 Dc=0,94×225=of 211.5 mm; α=69°; maximum movement of blocks vertically - 12 mm, which gives an axial displacement of the elements of the barrel to 4.3 mm

The sizes of blocks: B1=40 mm;2=50 mm, H=50 mm

The stoppers are attached by three bolts M16×1 mm; permissible axial load up to 1.8 TS.

The material of the retaining ring and moment - to article 45.

Roll forming mill containing the axis of the diameter d of the flange, forming the elements with a given katusin diameter D and the site of their mounting axis, characterized in that the said site is located on the drive side of the mill and is made of a cylindrical-conical retaining ring, placed on the axis, and three brakes, equidistant from each other and fastened to the axis of the bolt, with the upper and lower cylindrical surfaces, the diameters of which are equal, respectively (0,7...0,8) D and D, side surfaces of the stoppers parallel to the axis of the roll, and the outer end surface perpendicular to it, with auusie the conical inner surfaces of the stoppers, facing the forming elements at an angle of α=68...70° to the axis of the roll and in contact with the conical surface of the locking ring, forming inclined to the axis of the roll is also at an angle α.



 

Same patents:

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EFFECT: enhanced quality of bent shapes due to their improved geometry, lowered costs of production process.

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