CN201308907Y

CN201308907Y - Roller device for mill

Info

Publication number: CN201308907Y
Application number: CNU2009201155165U
Authority: CN
Inventors: 王瑞金; 徐跃松; 顾计松
Original assignee: ZHEJIANG ZHONGDA SPECIAL STEEL CO Ltd
Current assignee: ZHEJIANG ZHONGDA SPECIAL STEEL CO Ltd
Priority date: 2009-03-12
Filing date: 2009-03-12
Publication date: 2009-09-16
Anticipated expiration: 2019-03-12

Abstract

The utility model relates to a roller device for a mill, which is substantially used to roll steel pipes, and comprises an upper roller part and a lower roller part which comprise a gear, a bearing, a roller shaft and a roller, wherein the upper roller part and the lower roller part are mutually matched, and the gear, the bearing and the roller are sleeved on the roller shaft. The roller device is characterized in that the roller surface of the roller is equipped with a groove, and the contour curve of the bottom surface of the groove is a space rotary concave arc surface which rewinds a roller axis. The roller device for the mill has reasonable structure design, high precision and short rolling stroke, can increase the elongation and the wall reduction amount of the steel pipes, and reduces the rolling pass simultaneously.

Description

The milling train roll device

Technical field

The utility model relates to a kind of milling train roll device, is mainly used in rolled steel tube.

Background technology

With the steel pipe of the certain model of mill milling of prior art, rolling pass wants twice at least, need use the milling train of two kinds of different models, because the milling train of prior art can't guarantee to produce qualified steel pipe under the situation of only rolling once.Such as will being specification that to become specification be 25 * 2 steel pipe for 67 * 5 steel pipe rolling, need earlier with a kind of milling train of model with specification be 67 * 5 steel pipe rolling to become specification be 38 * 2.9 steel pipe, be that to become specification be 25 * 2 steel pipe for 38 * 2.9 steel pipe rolling with the milling train of another kind of model with specification again.Manufacturer need buy the milling train of two kinds of models, has increased production cost.Simultaneously, the precision of the milling train of prior art is not high yet, and general error is about 0.2mm.

The utility model content

Technical problem to be solved in the utility model is to overcome existing above-mentioned shortcoming in the prior art, and a kind of reasonable in design, simple to operate and milling train roll device that precision is high are provided.

The technical scheme in the invention for solving the above technical problem is: a kind of milling train roll device, comprise the top and bottom rolls parts of forming by gear, bearing, roll mandrel and roll, these top and bottom rolls parts mate mutually, gear wherein, bearing and roll sheath are contained on the roll mandrel, it is characterized in that: the roll surface of described roll is provided with groove, and the contour curve of described groove bottom surface is the space revolution concave arc curved surface of the roll axis that unrolls.

The external diameter of roll described in the utility model is 300 millimeters, and the ultimate range between described groove two walls is 67 millimeters, and minimum range is 38 millimeters.

The number of teeth of gear described in the utility model is 29, and modulus is 10.

The utility model compared with prior art has the following advantages and effect: 1, reasonable in design; 2, precision height, error of the present utility model has only about 0.05mm; 3, rolling stroke is short; 4, can improve the percentage elongation and the wall thickness reducing amount of steel pipe; 5, the utility model mainly uses in first passage of rolled steel tube, uses the rolling steel pipe that comes out of the utility model, need not to use mill milling in second passage again, only needs a sky to pull into required model steel pipe and gets final product.

Description of drawings

Fig. 1 is the utility model structure cutaway view.

Fig. 2 is the cutaway view of the utility model roll.

Fig. 3 is the partial sectional view of the utility model when rolled steel tube.

The specific embodiment

The utility model is described in further detail below in conjunction with accompanying drawing and by embodiment.

Embodiment:

Referring to Fig. 1 one Fig. 3, the utility model comprises that structure is identical but two parts that the installation site is different, and these two parts are respectively topping roll parts I and bottom roll parts II.

Topping roll parts I comprises gear 1, bearing 2, bearing 3, roll mandrel 4 and roll 5.Gear 1 is sleeved on roll mandrel 4 one ends, in order to improve the transmission efficiency of gear 1, can between gear 1 and roll mandrel 4 key 6 be set.Bearing 2 and bearing 3 are sleeved on the roll mandrel 4, and closely cooperate.One section roll mandrel between bearing 2 and bearing 3 is socketed with roll 5 on one's body, and itself and roll mandrel 4 closely cooperate.At bearing 2 and bearing 3 outsides bearing block 7 is installed also.The number of teeth of gear 1 is 29, and modulus is 10.The external diameter of roll 5 is 300 millimeters, and its roll surface is provided with groove 8, and the contour curve of groove 8 bottom surfaces is space revolution concave arc curved surfaces of the roll axis that unrolls, the A point for this reason the concave arc curved surface from roll centre distance point farthest; Ultimate range between 8 liang of walls of groove is 67 millimeters, and minimum range is 38 millimeters.

Bottom roll parts II comprises gear 9, bearing 10, bearing 11, roll mandrel 12 and roll 13, its structure and size all with the structure of topping roll parts I and measure-alike, no longer repeat.The B point is that the groove bottom profile curve of roll 13 is from roll centre distance point farthest.

Topping roll parts I and bottom roll parts II are installed in the milling train in opposite directions.Topping roll parts I is installed in directly over the bottom roll parts II, and roll mandrel 4 axis X are parallel with roll mandrel 12 axis Y and be positioned at same plane, and roll 5 is vertical with roll mandrel 4 axis X with the center of gravity line Z of roll 13.

During use, with specification be if desired 67 * 5 steel pipe 15 to be rolled into specification be 25 * 2 steel pipe, can select for use a supporting plug 14 to pierce in the steel pipe 15 earlier, the effect of plug 14 is internal diameters of control steel pipe 15 when rolling.Then steel pipe 15 is put in the groove 8 between roll 5 and the roll 13 and be rolled.In the operation of rolling, roll 5 and roll 13 direction of rotation, the B point line of the A point of roll 5 and roll 13 is all the time perpendicular to steel pipe 15 axis.After rolling the finishing, what obtain is the steel pipe of specification 38 * 1.5, its sky is pulled into specification at last again and be 25 * 2 steel pipe.

The steel pipe specification of mentioning in this specification, such as 67 * 5, the meaning of representative is: outer diameter of steel pipes is 67 millimeters, wall thickness is 5 millimeters.

In addition, need to prove, allly conceive equivalence or the simple change that described structure, feature and principle are done, all should be included in the protection domain of the utility model patent according to the utility model patent.

Claims

1, a kind of milling train roll device, comprise the top and bottom rolls parts of forming by gear, bearing, roll mandrel and roll, these top and bottom rolls parts mate mutually, gear wherein, bearing and roll sheath are contained on the roll mandrel, it is characterized in that: the roll surface of described roll is provided with groove, and the contour curve of described groove bottom surface is the space revolution concave arc curved surface of the roll axis that unrolls.

2, milling train roll device according to claim 1 is characterized in that: the external diameter of described roll is 300 millimeters, and the ultimate range between described groove two walls is 67 millimeters, and minimum range is 38 millimeters.

3, milling train roll device according to claim 1 is characterized in that: the number of teeth of described gear is 29, and modulus is 10.