CN201150930Y

CN201150930Y - Forced spread pass structure for strip milling

Info

Publication number: CN201150930Y
Application number: CNU2008200761036U
Authority: CN
Inventors: 刘战英; 刘阳; 张荣华; 张洪哲; 郭转林; 王学慧; 陈瑾
Original assignee: Hebei University of Science and Technology
Current assignee: Hebei University of Science and Technology; Hebei Polytechnic University
Priority date: 2008-01-18
Filing date: 2008-01-18
Publication date: 2008-11-19
Anticipated expiration: 2018-01-18

Abstract

The utility model relates to a forcible stretching pass structure which is used to roll strip steels, which belongs to the rolled steel technical field, and is used to solve the problem that the steel billet stretching capacity is further increased. The improvement is that two forcible stretching cutting wedges are arranged in a roll pass, each cutting wedge is composed of protruding parts which are corresponding upwards and downwards and are located on the bottom of a roll groove, and the two cutting wedges are symmetrically distributed on the roll pass. The forcible stretching pass structure introduces forcible stretching double cutting wedges into the design of a roughing mill roll pore roll pass, the double cutting wedges enables the flow of metal to two sides to be more forcible and enables the forcible stretching capacity to be increased greatly. Furthermore, the forcible stretching pass structure alleviates the abrasion through optimizing the size of the roll pass to solve the problem that the roll is seriously abraded according to the cutting edges with the protruding parts. The stretching capacity can reach 85 to 100mm through adopting the design of the pass structure to realize that a narrower continuous casting slab is used to manufacture a wider strip steel or the steel billets with one width is used to roll the strip steels with various widths, which is beneficial for extending the product and improving the rolling mill efficiency, and enables the production to be more flexible.

Description

A kind of be used for belt steel rolling force the broadening pass structure

Technical field

The utility model relates to the design of a kind of roll pass, particularly with narrower billet rolling go out than wide flat steel force the broadening pass structure, belong to technical field of steel rolling.

Background technology

Forcing the broadening pass is a kind of belt steel rolling technology, and it uses narrower billet rolling to go out the band steel of broad.In ribbon steel and medium-width strip production, the general width of steel billet kind of using is limited, how to roll out wideer band steel, just need use in breakdown pass is rolling and force the broadening pass.At present, force the broadening pass in ribbon steel and medium-width strip factory application to be arranged all, the common cutting wedge that forces broadening pass middle part to be provided with a projection is called single cutting wedge and forces the broadening pass, as shown in Figure 2.Under this cutting wedging action, can play the effect that metal is flowed to both sides in the operation of rolling, thereby increase the broadening amount of slab, this technology can be used the band steel of narrower billet rolling broad, obtains certain effect at aspects such as widening product, raising milling train efficient.But according to present single cutting wedge groove rolling, the broadening amount is less, and generally at 20-30mm, maximum can reach 40-50mm.How to make the more of broadening amount increase, rolling wideer band steel is the target that ribbon steel and medium-width strip production are pursued always.

Summary of the invention

The utility model be used to overcome the defective of prior art and provide a kind of and be provided with two cutting wedges, can make the broadening amount reach 85～100mm be used for belt steel rolling force the broadening pass structure.

The alleged problem of the utility model is solved by following technical scheme:

A kind of be used for belt steel rolling force the broadening pass structure, be used for roughing mill, its special feature is: be provided with two cutting wedges that force broadening in the described pass, each cutting wedge is made of the corresponding up and down boss that is positioned at the groove bottom, and described two cutting wedges are arranged symmetrically on the pass.

Above-mentioned be used for belt steel rolling force the broadening pass structure, the bottom width B of described cutting wedge boss is the 25-30% of pass width L; Top width A is 1/2 of its bottom width, and the boss height H is the 1/10-1/12 of its bottom width B, and the radius of the fillet C of boss drift angle place is 50～60mm.

Above-mentioned be used for belt steel rolling force broadening pass structure, described two cutting wedge centre-to-centre spacing L ₁1/2-1/3 for pass width L.

The utility model forces the big inadequately problem of broadening pass broadening amount to improve at existing single cutting wedge, in the design of roughing mill roll pass, introduce the two cutting wedges that force broadening, two cutting wedges can make metal more strong to flowing of both sides, make and force the broadening amount to increase greatly.In addition, the utility model has protruding cutting wedge according to pass, and the serious problem of roll wear alleviates wearing and tearing by optimizing the pass size.Adopt design of the present utility model, can make the broadening amount reach 85～100mm, realize band steel, or go out the band steel of multiple width with a kind of billet rolling of width with the narrower rolling broad of continuous casting billet of use, help widening product, improve milling train efficient, make production more flexible.

Description of drawings

Fig. 1 is the utility model structural representation;

Fig. 2 is that single cutting wedge forces broadening pass schematic diagram;

Fig. 3 adopts reversing rougher roll structural representation of the present utility model.

Each parts label is as follows among the figure: 1. pair cutting wedge forces the broadening pass; 2. cutting wedge; 3. boss; 4. vertical pass; 5. flat rolling; 6. top roll; 7. lower roll.

The specific embodiment

Referring to Fig. 1, be applied to pass structure on the two-roller reversible formula roughing mill for the utility model shown in the figure.As seen from the figure, this pair cutting wedge forces and is provided with two cutting wedges 2 in the broadening pass 1, and each cutting wedge is made of the corresponding up and down boss 3 that is positioned at the groove bottom, and two cutting wedges are arranged symmetrically on the pass.Because pass has the cutting wedge of projection, roll wear is serious, needs by optimizing the pass size wearing and tearing to be alleviated.The bottom width B of cutting wedge boss 3 is 25～30% of pass width L, and top width A is 1/2 of its bottom width, and the boss height H is 1/10～1/12 of its bottom width B, and the radius of the fillet C of boss drift angle place is 50～60mm.Two cutting wedge centre-to-centre spacing L ₁Be 1/2～1/3 of pass width L.

Below provide a specific embodiment: referring to Fig. 3, roughing mill is the two-high reversing mill of Φ 750mm, and the diameter of upper and

lower roll

6,7 is Φ 750mm, and barrel length is 2100mm.Now use the continuous casting billet of 180mm * 495mm * 6800mm, by force rolling 4 passages in the broadening pass 1 at two cutting wedges, every once rolling, top roll will be pressed next distance, can roll out the intermediate blank that width is 568.8mm, force in the broadening pass 1 after rolling the finishing at two cutting wedges, top roll 6 lifts fast, rolled piece is rolled in vertical pass 4 for 90 ° through the tilting gear upset, plays the effect of processing limit portion.After rolling on edge 2 passages, rolled piece is set level, and carries out 3 passage flat rollings at 5 places on roll right side again, rolls out the rolled piece of 19mm * 580mm.The rolling process broadening amount reaches 85mm.

Above-mentioned pair of cutting wedge forces the main design size of broadening pass as follows: L=570mm, L ₁=270mm, B=160mm, A=80mm, H=14mm, the radius of fillet C are 50mm.

Two cutting wedges force the broadening pass, also can in three roller coggings, use.But application need designs a plurality of passes on the three-high bloomer, because the contrary formula only rolling passage of each pass on three-high bloomer slightly.

Claims

One kind be used for belt steel rolling force the broadening pass structure, be used for roughing mill, it is characterized in that: be provided with two cutting wedges (2) that force broadening in the described pass (1), each cutting wedge is made of the corresponding up and down boss (3) that is positioned at the groove bottom, and described two cutting wedges are arranged symmetrically on the pass.
2. according to claim 1 be used for belt steel rolling force the broadening pass structure, it is characterized in that: the bottom width [B] of described cutting wedge boss is the 25-30% of pass width [L]; Top width A is 1/2 of its bottom width, and boss height [H] is the 1/10-1/12 of its bottom width [B], and the radius of boss drift angle place fillet [C] is 50～60mm.
3. according to claim 1 and 2 be used for belt steel rolling force the broadening pass structure, it is characterized in that: described two cutting wedge centre-to-centre spacing [L ₁] be the 1/2-1/3 of pass width [L].