CN103357663A - F-shaped steel mill roll double-hole type and rolling method - Google Patents

Abstract

The invention discloses an F-shaped steel mill roll double-hole type and a rolling method. The double-hole type is formed by splicing an upper roll and a lower roll of a rolling mill and is a pair of F-shaped steel hole types which is symmetric along an axial line AA and are communicated through a connecting area. The axial line AA is perpendicular to the horizontal central ling BB of the double-hole type; and the connecting area is used for connecting one side, corresponding to the free end of a wing plate of the rolled F-shaped steel, of each F-shaped steel hole type. According to the rolling method, rolling is performed through a production line consisting of a reversible roughing mill and a universal rolling mill group; and each universal rolling mill of the universal rolling mill group is provided with the mill roll of the F-shaped steel mill roll double-hole type. The F-shaped steel mill roll double-hole type is used for rolling, so the rolling speed, namely the yield of steel per hour can be increased, the production cost can be reduced, the rolling stability can be improved, and the yield of finished products can be increased.

Description

F shaped roll diapsid and milling method

Technical field

The present invention relates to the rolling field of deformed steel, be specifically related to a kind of F shaped roll diapsid and milling method, is a kind of brand-new pass exploitation and milling method, and it improves deformed steel hour output of steel and rolling stability, reduces production costs.

Background technology

F shaped steel is a kind of in the deformed steel, can be used for magnetic suspension train rail.In recent years along with urban core zone, intercity between the traffic requirements of special-purpose low cost, high operation ability, middle low speed magnetic suspension train project is progressively promoted, and with the fast speed development, such as Kunming International Horticultural Expo Garden industrial siding (2 kilometers); Forest Soil on Badaling Mountain in Beijing tourism industrial siding (80 kilometers); Guangzhou-Foshan (70 kilometers); The existing substantive plan in Guangzhou-Dongguan (50 kilometers); The existing relevant purpose plan in other more than 60 cities; 1.9 kilometers test wires of Tangshan carshop put into operation on July 1st, 2006, and put into operation December; 12.9 kilometers on Guangdong Zhong Shan line has been finished engineering design, is carrying out detail design.In addition, 70 kilometers lines of Ma Laixiya are signed an agreement with the floating company of north control magnetic with on September 6th, 2006.Also all there is substantive plan in the Singapore in Southeast Asia.The construction of nearly hundred middle low speed magnetic floating lines will be arranged future, and Chinese city, suburban area have more than 10,000 kilometer market, and the international market that approximately has 8 to 120,000 kilometers is so the demand of F shaped steel is very large, market prospects are wide.

In the present domestic steel production enterprise, the production of F shaped steel is mainly take the Laigang as main, the large H type steel production line capital equipment of Laigang by the design of German SMS company, make, the H shaped steel of largest production 900 * 300 specifications also can be produced the deformed steels such as " F ", 25, the large angle steel of 22 specifications simultaneously.Comprise reversible blooming mill and universal rolling mill group (order of placement is UR, E, UF) in this production line, the roll pass of producing the universal rolling mill of F shaped steel is single F pass, low and the single F pass of F shaped steel hour output of steel causes rolling stability poor, yield rate is low, only be 70%, therefore wilderness demand that can't satisfying the market needs to improve production line to improve hour output of steel, and the raising rolling stability, increase yield rate.

Summary of the invention

The object of the invention is to for the deficiencies in the prior art, a kind of F shaped roll diapsid is provided.This pass can improve the i.e. hour output of steel of mill speed, reduces production costs.

Another object of the present invention is to provide a kind of method that adopts the rolling F shaped steel of above-mentioned roll diapsid, this milling method can improve rolling stability, improves yield rate.

To achieve these goals, the present invention has adopted following technical scheme:

A kind of F shaped roll diapsid, top roll and lower roll by milling train are put together, this diapsid be a pair of along axis AA F Pass symmetrical and that connect through join domain, described axis AA is vertical with the horizontal center line BB of described diapsid, and described join domain links together a side corresponding with the free end of the wing plate of rolling F shaped steel in the described a pair of F Pass.

Because the roll pass of existing universal rolling mill is single F Pass, F shaped steel hour output of steel is low, so the present invention is on the basis of existing equipment, by reference existing " F " Pass parameter, adopt symmetrical turning, to go out along axis AA symmetry be left-right symmetry and a pair of F Pass that connects through join domain in turning on new roll.Output of steel can be doubled in such hour.

In described F shaped roll diapsid, as a kind of preferred embodiment, the length of described join domain is 180-220mm, highly is 18-22mm, is convenient to like this secondary machine.More preferably, the length of described join domain is 200mm, highly is 20mm.

In described F shaped roll diapsid, described join domain can in the vertical direction any position a pair of F Pass is communicated with, that is to say, described join domain can be positioned at described diapsid horizontal center line BB top, below or cover the horizontal center line BB of described diapsid, as a kind of preferred embodiment, the horizontal center line BB of described diapsid passes through described join domain central point, and intersects in described central spot and described axis AA.That is to say, described join domain covers the horizontal center line BB of described diapsid just.

A kind of milling method of F shaped steel, it is rolled by the production line that reversible blooming mill and universal mill group consist of, each universal mill in the described universal mill group has the roll (being designated hereinafter simply as symmetrical pass) of above-mentioned F shaped roll diapsid, and this milling method comprises following operating procedure:

Step 1 utilizes reversible blooming mill that blank is rolled, and enters the required rolled piece of universal mill group to roll out;

Step 2 utilizes the UR/E/UF milling train described rolled piece to be rolled a pair of F shaped steel (being the symmetrical pass mill product) that obtains connecting as one successively;

Step 3 is carried out sawing, planing and turning processing to the middle join domain of a pair of F shaped steel that connects as one, with a pair of F shaped steel that will connect as one separately and obtain finished product F shaped steel.

For reversible blooming mill and the universal mill with above-mentioned roll pass are adapted, the roll of reversible blooming mill also needs symmetrical turning pass, namely according to existing size turning left-right symmetry pass on new roll, in order to roll out the required rolled piece of universal mill group.

Because the milling train that uses in this milling method has the roll that above-mentioned pass is symmetrical pass, compare with the single-orifice type milling method, overcome because of deformed steel rolling in, stress is asymmetric, the asymmetric rolled piece that causes of shape twists, the problem of size distortion, the rolled piece that causes because roll-force is inhomogeneous is head and nose phenomenon partially, overcome simultaneously the unsettled problem of transporting that rolled piece causes because profile is asymmetric when roller transport, the rolling rolled piece that improves of diapsid is at the rolling stability in tandem mill zone simultaneously.

The present invention compared with prior art has following beneficial effect:

The present invention is according to section steel works large-scale production line rolling mill design ability, under the existing equipment condition, designed diapsid (being symmetrical pass), the method that adopts symmetrical pass to be rolled has improved mill speed, original production line hour output of steel is 50-160t, hour output of steel is 290-300t behind the roll pass of the present invention and adopt, and rolling stability is improved, and yield rate has increased by 15%, make the rolling mass production of accomplishing maximum-norm of " F " shaped steel, reduced production cost.

Description of drawings

Fig. 1 is the symmetrical pass mill product cross section view that adopts symmetrical pass roll of the present invention to be rolled;

Fig. 2 is the schematic diagram of the symmetry rolling pass (being horizontal diapsid) that is assembled into of top and bottom rolls of the present invention.

Wherein, description of reference numerals is as follows: 1-wing plate, 2-web, the straight leg of 3-, 4-battered leg

The specific embodiment

Below by the specific embodiment content of the present invention and technical characterictic are elaborated, but the present invention is not limited to this.

Referring to Fig. 2, a kind of F shaped roll diapsid, be put together by the top roll of universal rolling mill and lower roll and namely formed by the top roll of universal rolling mill and the groove of lower roll, this pass be a pair of along axis AA F Pass symmetrical and that be communicated with through join domain, the horizontal center line BB of described axis AA and described diapsid is vertical and intersect at the central point of described join domain, that is to say, the horizontal center line BB of described diapsid is by described join domain central point (part that is the join domain horizontal center line BB both sides that are positioned at described diapsid is symmetrical up and down along the horizontal center line BB of described diapsid) and crossing with described axis AA in described central spot, it not only is beneficial to secondary operations, and is beneficial to rolled piece and evenly extends.Described join domain links together a side (being F shaped steel tail end) corresponding with the free end of the wing plate of rolling F shaped steel in the described a pair of F Pass, adopt join domain will the part corresponding with F shaped steel wing plate free end be connected can better controlled rolling process in the center of gravity of rolled piece, thereby avoid inclined to one side and nose of rolled piece.Single F Pass is existing F Pass, and wing plate 1, the straight leg 3 that is positioned at web 2 both sides and battered leg 4 that the F shaped steel that it rolls out has web 2, stretched out by web 2 levels are referring to Fig. 1; F shaped roll diapsid of the present invention is that above-mentioned single F Pass is connected by join domain.This join domain is the continuous design of " F " steel tail end, and the horizontal center line BB of its described diapsid equates apart from the vertical range at both ends about the pass, is about 470mm.

For the ease of secondary operations, the length that described join domain length is horizontal direction is preferably 180-220mm, and height h is that the height of vertical direction is 18-22mm.More preferably length is 200mm, and height h is 20mm.Roll with pass of the present invention is to adopt mode turning on new roll of symmetrical turning to go out a pair of symmetrical pass.

The below specifies milling method of the present invention.

Embodiment

The top and bottom rolls of universal roughing mill and universal finishing mill all has symmetrical pass of the present invention;

For reversible blooming mill and the universal mill with above-mentioned symmetrical pass are adapted, the roll pass on the reversible blooming mill also is symmetrical.

Milling method is as follows:

Step 1 utilizes two-roller reversible blooming mill (BD) that blank is rolled, and enters the required rolled piece of universal mill group to roll out.

Step 2, utilize successively the UR/E/UF milling train described rolled piece to be rolled a pair of F shaped steel (being the symmetrical pass mill product) that obtains connecting as one, referring to Fig. 1, the secondary operations zone that it comprises a pair of symmetrical F shaped steel and connects this a pair of F shaped steel.

Step 3 is carried out sawing, planing and turning processing to the middle join domain of a pair of F shaped steel that connects as one, with a pair of F shaped steel that will connect as one separately and obtain finished product F shaped steel.

Comparative Examples

Rolling finished product F steel section size is identical with embodiment.

The top and bottom rolls pass of universal roughing mill and universal finishing mill is single F Pass, and the roll pass of reversible blooming mill adapts with it, and milling method is:

Step 1 utilizes reversible blooming mill that blank is rolled, and enters the required rolled piece of universal mill group to roll out.

Step 2 utilizes the UR/E/UF milling train that described rolled piece is rolled successively, obtains finished product F shaped steel.

The milling method of this Comparative Examples hour output of steel is about 120t, and hour output of steel of the milling method of embodiment is about 300t, and rolling stability is improved, and the milling method of the embodiment of the invention is compared with the milling method of Comparative Examples, and yield rate has increased by 15%.

The purposes that should be appreciated that these embodiment only is used for explanation the present invention but not is intended to limit protection scope of the present invention.In addition; also should understand; after having read technology contents of the present invention, those skilled in the art can make various changes, modification and/or modification to the present invention, and these all equivalent form of values fall within the protection domain that the application's appended claims limits equally.

Claims (5)

1. F shaped roll diapsid, it is characterized in that, top roll and lower roll by milling train are put together, this diapsid be a pair of along axis AA F Pass symmetrical and that be communicated with through join domain, described axis AA is vertical with the horizontal center line BB of described diapsid, and described join domain links together a side corresponding with the free end of the wing plate of rolling F shaped steel in the described a pair of F Pass.

2. F shaped roll diapsid according to claim 1 is characterized in that, the length of described join domain is 180-220mm, highly is 18-22mm.

3. F shaped roll diapsid according to claim 2 is characterized in that, the length of described join domain is 200mm, highly is 20mm.

4. F shaped roll diapsid according to claim 1 is characterized in that, the horizontal center line BB of described diapsid passes through described join domain central point, and intersects in described central spot and described axis AA.

5. the milling method of a F shaped steel, it is characterized in that, the production line that consists of by reversible blooming mill and universal mill group is rolled, and each universal mill in the described universal mill group has the arbitrary roll pass of claim 1-4, and this milling method comprises following operating procedure:

Step 1 utilizes reversible blooming mill that blank is rolled, and enters the required rolled piece of universal mill group to roll out;

Step 2 utilizes the UR/E/UF milling train described rolled piece to be rolled a pair of F shaped steel that obtains connecting as one successively;

Step 3 is carried out sawing, planing and turning processing to the middle join domain of a pair of F shaped steel that connects as one, with a pair of F shaped steel that will connect as one separately and obtain finished product F shaped steel.

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