CN203541080U - Phi 850 rolling mill roller for rolling Phi 230 - Phi 250 round bars - Google Patents

Abstract

The utility model discloses a Phi 850 rolling mill roller for rolling Phi 230 - Phi 250 round bars. A box type pass is adopted as the pass of the roller, and the bottom of the pass of the roller is provided with a bottom circular arc with concavity. The Phi 850 rolling mill roller ensures that the top surface and bottom surface of a continuously rolled material have convex circular arcs, consequently, the broadening deformation of finished product due to vertical lathes is improved, the plane problem of the finished products is solved, and quality discrepancy is reduced.

Description

φ 850 rolling mill rolls of rolling φ 230-φ 250 round steel

Technical field

The utility model relates to a kind of steel rolling equipment, specifically, relates to a kind of rolling

round steel

rolling mill roll.

Background technology

Our factory is in rolling

in the process of round steel, ovality is overproof.Main cause is that the specification that raw material adopts is 319*410 blank, causes compression smaller.Rolling in addition

round steel, employing be

first three frame rolling of tandem rolling,

1,3 cars are vertical cars,

roll supplied materials is square, causes the broadening face of finished product to open up not out, forms plane, causes finished product ovality overproof.

As shown in Figure 1, be rolling in prior art 's

milling train join roller figure.What I, II, III, IV roll all adopted is box pass; I hole roll grooving minimum widith is 320mm, and Breadth Maximum is 380mm, and pass cutting groove depth is 195mm, and the interior radius of circle of pass is 40mm, and the exradius of pass is 20mm; II hole roll grooving minimum widith is 280mm, and Breadth Maximum is 315mm, and pass cutting groove depth is 175mm, and the interior radius of circle of pass is 20mm, and the exradius of pass is 20mm; III hole roll grooving minimum widith is 235mm, and Breadth Maximum is 280mm, and pass cutting groove depth is 160mm, and the interior radius of circle of pass is 20mm, and the exradius of pass is 20mm; IV hole roll grooving minimum widith is 160mm, and Breadth Maximum is 225mm, and pass cutting groove depth is 160mm, and the interior radius of circle of pass is 25mm, and the exradius of pass is 25mm.After the completing of rolling, from II hole, go out the supplied materials for tandem rolling.

Utility model content

The technical problem that the utility model solves is to provide a kind of rolling round steel

rolling mill roll, makes to obtain the supplied materials upper and lower surface band projection circular arc of tandem rolling, has improved the spreading deformation of the vertical car of finished product, has solved the problem of finished product plane.

Technical scheme is as follows:

φ 850 rolling mill rolls for rolling φ 230-φ 250 round steel, described roll pass adopts box pass, and described roll pass bottom land is provided with the bottom land circular arc with concavity.

Further: described gullet radius is 1229mm, be highly 16mm.

Further: roll grooving minimum widith is 280mm, Breadth Maximum is 315mm, and pass cutting groove depth is 191mm, and the interior radius of circle of pass is 20mm, and the exradius of pass is 25mm, and drafts is 20mm.

Compared with prior art, technique effect of the present utility model comprises:

Make to obtain the supplied materials upper and lower surface band projection circular arc of tandem rolling, improved the spreading deformation of the vertical car of finished product, solved the problem of finished product plane, reduced quality objection, estimate can bring benefits every year 1000000 yuan.

Accompanying drawing explanation

Fig. 1 is rolling in prior art 's milling train join roller figure;

Fig. 2 is the pass figure in III hole in the utility model.

The specific embodiment

By analysis, learning, is mainly because broadening causes finished product ovality overproof not, and broadening exhibition not main cause is out

the supplied materials of milling train is square, in mistake

during milling train, drafts is inadequate, causes broadening to open up not out, so we have designed one and have been applicable to supplying

the supplied materials pass of tandem rolling leaves

on rolling mill roll, utilize

milling train invertibity allows supplied materials be pressed into the material shape of suitable shape.

As shown in Figure 2, be the pass figure in III hole in the utility model.III hole roll grooving minimum widith is 280mm, and Breadth Maximum is 315mm, and pass cutting groove depth is 191mm, the interior radius of circle of pass is 20mm, and the exradius of pass is 25mm, and gullet radius is 1229mm, drafts is 20mm, and the height of bottom land circular arc is 191-175=16mm.

Due to

milling train supplied materials is originally square, original pass bottom land is provided with to the bottom land circular arc of concavity, because

milling train is equivalent to flatcar, and by adding circular arc, blank (to the supplied materials of tandem rolling) the upper and lower surface band projection circular arc that rolling is completed, can improve like this spreading deformation of the vertical car of finished product, thereby solve the problem of finished product plane, and the feed of tandem rolling goes out from III hole.

Claims (3)

1. a rolling φ 230-φ 250round steel φ 850rolling mill roll, described roll pass adopts box pass, it is characterized in that: described roll pass bottom land is provided with the bottom land circular arc with concavity.

2. rolling as claimed in claim 1 φ 230-φ 250round steel φ 850rolling mill roll, is characterized in that: described gullet radius is 1229mm, is highly 16mm.

3. rolling as claimed in claim 1 φ 230-φ 250round steel φ 850rolling mill roll, is characterized in that: roll grooving minimum widith is 280mm, and Breadth Maximum is 315mm, and pass cutting groove depth is 191mm, and the interior radius of circle of pass is 20mm, and the exradius of pass is 25mm, and drafts is 20mm.

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