CN210754353U - Hot-rolled strip steel endless rolling intermediate billet connecting device - Google Patents
Hot-rolled strip steel endless rolling intermediate billet connecting device Download PDFInfo
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- CN210754353U CN210754353U CN201921464316.0U CN201921464316U CN210754353U CN 210754353 U CN210754353 U CN 210754353U CN 201921464316 U CN201921464316 U CN 201921464316U CN 210754353 U CN210754353 U CN 210754353U
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Abstract
The utility model belongs to the technical field of steel rolling, and relates to a hot-rolled strip steel headless rolling intermediate billet connecting device, wherein the head and the tail of an intermediate billet are straightened into straight end surfaces by a straightening machine, the head and the tail of two intermediate billets are cut into certain bevel edges by a shearing machine, so that the end parts of the two intermediate billets are aligned, and then the intermediate billets are connected by a jointing machine; the body of the jointing machine is fixed, the welding head and the intermediate blank move in different directions at different speeds, and the formed connecting track is superposed with the track of the bevel edge joint part at the end part of the intermediate blank, so that the connection is realized. The utility model discloses equipment is simple, area is little, and joint strength is high, connection range is wide, and the problem of space restriction when having overcome middle base and connecting realizes the connection of middle base under the limited condition in conventional production line space to be applicable to the connection between different material slabs.
Description
Technical Field
The utility model belongs to the technical field of the steel is rolling, a blank connecting device in middle of hot rolling belted steel headless rolling is related to.
Background
The endless rolling of the hot-rolled strip steel refers to that the rolled blank is not divided into blocks in the finish rolling stage, strip threading is carried out for one time, continuous finish rolling is carried out, and the rolled strip steel is cut into steel coils with required weight by high-speed flying shears. Compared with conventional hot-rolled single block rolling, endless rolling has the following significant advantages: the unstable part in the rolling process of the strip steel is eliminated, so that the quality is stable, and the yield is improved; the production of ultrathin, wide and thin products can be realized; when rolling thin strip, the production is stable and the productivity is improved; the tension of the strip steel between the frames is kept stable, so that the deviation of the thickness and the flatness of the strip steel is reduced; the threading and tail flicking times are reduced, and the impact and damage to the roller are reduced; the product has more uniform structure performance.
At present, the endless rolling modes of hot rolled strip steel mainly comprise conventional endless hot rolled rolling and endless thin slab continuous casting and rolling. Since the first short-flow CSP production line in the world of 1989 was put into operation in the Nikoco iron and Steel company of America, the development of continuous casting and rolling of thin slabs has become one of the important production modes of hot rolled strips after 30 years, but the technology is mainly applied to a new production line, and the product range is narrower than that of the conventional hot continuous rolling. The conventional hot rolling endless rolling production is superior to the thin slab continuous casting endless rolling in both product coverage and product quality because of the separation of continuous casting and rolling; from the market perspective, the domestic hot rolled plate capacity is seriously surplus, and the opportunity of new projects is few. Therefore, the conventional hot continuous rolling endless rolling production line based on the conventional hot continuous rolling production line is improved, so that the product quality and the production efficiency can be improved, and the aim of high-quality development is fulfilled; the existing hot continuous rolling production line can be more fully used and utilized, and the method conforms to the call of energy conservation and environmental protection.
The existing conventional hot continuous rolling production is changed into endless rolling production, and the most key technical problem is the connection problem of the intermediate blank after rough rolling. Because the endless rolling adopts a belt tension rolling mode, and the second flow of the intermediate billet and the second flow of the finish rolling mill are equal, the connection speed and the quality of the intermediate billet in a hot state influence whether the endless rolling can be realized: if the connection speed is too slow and the connection time is too long, the production efficiency is influenced, and obvious temperature drop is generated, so that the subsequent finish rolling is difficult to perform; if the connection strength is not high and the quality is not good, the strip breakage is easy to occur at the connection part, so that the continuous finish rolling can not be carried out; more importantly, as the conventional hot rolling endless rolling is mainly oriented to the reconstruction of the existing hot continuous rolling production line, and the production line space is fixed, the connecting equipment is not suitable to be large and complex, otherwise, the installation position of the equipment is limited, and the investment and production maintenance cost are increased.
At present, the endless rolling intermediate billet connection method realizes an induction heating connection method, a laser heating connection method and a shearing and pressing connection method which are industrially applied.
The induction heating connection method is a connection technology developed by Kawasaki iron making, and adopts electromagnetic induction heating to generate large induction current at the head and the tail of an intermediate blank so as to heat and raise the temperature of the intermediate blank, and then a joint surface is pressed to complete connection. This connection method requires a connection time of about 20 s. The moving speed matched with the finish rolling procedure needs to be kept in the connection process of the intermediate billet, so that the connection mechanism also needs to keep moving at the same speed as the intermediate billet, according to the moving speed of 1m/s of the existing intermediate billet, the welding can be completed only by moving at least 20m by a huge induction heating mechanism, and the space of the existing hot continuous rolling production line is fixed, so that the moving space of 20m of the connection equipment is met, and the realization is difficult.
The laser heat welding method is a connection technology developed by a new day iron, is similar to an induction heating connection method, and adopts laser heating and then welding. The laser heat welding method also requires the connecting device to move during the connecting process, and thus there is a problem in that the moving space of the connecting device is limited. The shearing and crimping method is a connection technology developed by Mitsubishi Hitachi and Mitsubishi, a specially designed shearing machine is adopted to shear the lapping area of the intermediate billet along the inclined plane, two non-oxidation surfaces are formed by shearing, the newly formed two surfaces move relatively to each other by the shearing force to generate friction, a large amount of heat energy is generated, the diffusion of the surfaces is accelerated, and the shearing machine applies pressure to the inclined plane to form physical combination along the shearing plane while shearing. The shear crimping method can complete the joining of the intermediate blanks within 1s, and therefore the joining apparatus does not need to be moved. However, the connection method is a physical connection by applying pressure to a shearing surface, the connection effect is greatly influenced by the chemical composition of the connection material, and when the content of carbon or other alloy elements in the connection material is high, the connection strength is influenced, so that the connection method can only be used for the connection of low-carbon steel or low-alloy steel at present; meanwhile, the equipment has large volume and length of about 17m because of the requirement of meeting the extremely high pressure required by physical connection, large occupied space and high equipment investment and maintenance cost.
In a word, the intermediate blank connecting mode of the existing application limits the types of produced products except that the connecting application range is narrow, and the most main problem is that a connecting mechanism needs to walk and weld, the occupied space of a production line is large, and the connecting mode is undoubtedly the largest obstruction to the existing production line with fixed space.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a hot rolling belted steel does not have rolling intermediate billet connecting device of rolling that connecting steel grade wide range, equipment occupy the production line space little.
In order to achieve the above purpose, the utility model provides a following technical scheme:
a hot-rolled strip steel endless rolling intermediate billet connecting device comprises a roughing mill, a shearing machine, a jointing machine and a finishing mill, wherein the shearing machine comprises a cutter for shearing an intermediate billet, and a welding head is arranged on the jointing machine; the first intermediate blank and the second intermediate blank move at the same speed and the moving direction is the first direction, the welding head moves at the same speed in the direction forming an angle theta with the first direction and welds the intermediate blanks in the moving process to form a linear joint part track, and the first intermediate blank and the second intermediate blank are connected; the roughing mill, the shearing machine, the bonding machine, and the finishing mill are sequentially arranged in the moving direction of the first intermediate billet.
Optionally, a hot box is provided between the roughing mill and the shear.
Optionally, a deburring machine is arranged between the bonding machine and the finishing mill.
Optionally, a straightener is further arranged between the roughing mill and the shearing machine.
Alternatively, the welding heads can adopt 1 or more groups, when a plurality of groups of welding heads are selected, the welding heads are arranged at equal intervals along the connecting track, and the stroke of each welding head is larger than the interval between two adjacent welding heads.
The beneficial effects of the utility model reside in that:
the utility model connects the intermediate billet in a way that the body is fixed and the welding head is movable, the body of the jointing machine does not follow the intermediate billet to walk, thereby reducing the walking space of the connecting device, saving the space of a production line, reducing the occupied area, being more widely applicable to the reconstruction of the production line with limited built space, and saving the investment and maintenance cost of the walking device required when the equipment of the jointing machine body is in walking welding; the welding mode adopts one or more of several modes such as friction welding, laser welding, plasma welding and the like to be combined, the welding mode is flexible, mature and reliable, and the range of connectable materials is wide.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and/or combinations particularly pointed out in the appended claims.
Drawings
For the purposes of promoting a better understanding of the objects, features and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic view of the apparatus of the present invention;
FIG. 2 is a schematic view of the apparatus of the present invention in the Z-direction;
FIG. 3 is a schematic view of the joint of the present invention;
FIG. 4 is a schematic view of a bonding machine according to embodiment 1;
FIG. 5 is a view of example 1 in the Z direction from time t to time t + n;
fig. 6 is a view of example 2 in the Z direction from time t to time t + n.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in any way limiting the scope of the invention; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc., indicating directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore, the terms describing the positional relationships in the drawings are only used for illustrative purposes and are not to be construed as limiting the present invention, and those skilled in the art can understand the specific meanings of the terms according to specific situations.
Referring to fig. 1-6, the reference numbers in the figures refer to the following elements: 1-second intermediate billet, 2-first intermediate billet, 3-joint, 4-body, 5-welding head, 6-combined area, 7-non-combined area, 8-roughing mill, 9-hot rolling box, 10-straightening machine, 11-shearing machine, 12-clamping device, 13-intermediate billet jointing machine, 14-deburring machine and 15-finishing mill.
Example 1
As shown in fig. 1 and 2, in the present embodiment, a hot rolled strip joining apparatus for endless rolling of an intermediate slab is provided with a leveler 10, a shear 11, a holding device 12, a jointer 13, and a deburring machine 14 between a hot box 9 and a finishing mill 15 after a roughing mill 8.
The straightening machine 10 can straighten the head and tail parts of the first intermediate blank 2 and the second intermediate blank 1. The shearing machine 11 can shear the head and tail shapes of the first intermediate blank 2 and the second intermediate blank 1 and shear the head and tail shapes into bevel edge shapes matched with each other. The bonding machine 13 connects the head-to-tail bevel edge joint 3 of the first intermediate blank 2 and the second intermediate blank 1. After the connection is completed, the deburring machine 14 removes an unnecessary part generated at the joint portion 3, and then, the connection is finish-rolled in the finish rolling mill 15. In FIG. 1, the X direction (first direction) is a direction in which rough rolling is directed to finish rolling, and is also a direction parallel to the center line of the line. The Y direction in fig. 2 is a direction at a horizontal angle to the X direction.
The operation steps of the scheme are as follows:
s1 cutting the head and the tail, wherein the first intermediate blank 2 and the second intermediate blank 1 are both at the speed V1Moving towards the X direction (namely the first direction), and shearing the materials into inclined edges which are matched with each other head and tail through a shearing machine 11, wherein the two matched inclined edges are aligned to form an inclined edge joint part 3;
s2 connection, when the joint 3 in step S1 passes the bonding machine 13, the body 4 of the bonding machine 13 is fixed, and the bonding head 5 is driven by the mechanism at the speed V2Moves in the Y direction and welds the joint 3 during the movement.
In step S2, first intermediate blank 2 and second intermediate blank 1 are rotated at V1Is moved in the X direction at a speed of V and the bonding head 5 is moved in the V direction2So that the relative movement of the first 2 and second 1 intermediate blanks and the welding head 5 forms a welding trackThe welding locus is formed along the joint 3, the joint 3 is softened and plastically flows to connect the first intermediate blank 2 and the second intermediate blank 1, and the welding head 5 returns to the initial position after the welding is completed.
Since the body 4 of the bonder 13 is stationary during the bonding process, only the bonding head 5 is moved and can pass through the counter speed V1、V2The size of, the adjustment of direction, adjust the welding orbit, the formation direction and the formation speed of control welding seam, only need consider the fixed occupation of land space of bonder 13 body 4 when consequently this scheme is implemented, and need not consider the required occupation of land space (X direction space) of jointing equipment walking, this has practiced thrift the production line space greatly, area has been reduced, also make the limited production line transformation in present space that is applicable to of this technique ability more extensive, and required equipment investment cost and maintenance cost when saving bonder 13 body 4 equipment walking welding.
In the implementation process of the scheme, the following auxiliary equipment can be applied to achieve a better implementation effect. The head and the tail of the first intermediate blank 2 and the second intermediate blank 1 can be straightened by the straightening machine 10, so that the first intermediate blank 2 and the second intermediate blank 1 are kept aligned in a straight manner, and the connection of the first intermediate blank 2 and the second intermediate blank 1 is facilitated; the head and tail parts of the first intermediate blank 2 and the second intermediate blank 1 can be removed through the shearing machine 11, so that the welding efficiency is improved, and the head and tail parts of the first intermediate blank 2 and the second intermediate blank 1 are sheared into bevel edge shapes which are matched with each other, so that the track requirements of the joint part 3 during welding are met; the burr removing machine 14 can prevent the redundant parts (burrs) generated at the joint 3 from entering the finishing mill and damaging the roll surface; the first intermediate blank 2 can be aligned and relatively stabilized with respect to the second intermediate blank 1 by means of the holding devices 12 symmetrically arranged on both sides of the intermediate blank.
In the implementation process of the scheme, the following preferred scheme can be applied to achieve better implementation effect. The bonding head 5 of the bonding machine 13 performs bonding of the joint 3 by a gradual connection method from one side to the other side in the width direction. The welding mode can adopt one or more of friction welding, laser welding, plasma welding and the like, or can be combined with other welding modes, such as ultrasonic wave and laser welding. The welding modes are flexible, mature and reliable, the range of connectable materials is wide, and the process difficulty and equipment investment of endless rolling are reduced; the method can achieve higher welding joint connection strength, improve the process quality of endless rolling of the strip steel and improve the production efficiency.
Example 2
The present embodiment differs from embodiment 1 in that a plurality of bonding heads 5 are applied to bond the bonding portion 3 in the present embodiment. Given the 2 tips 5, multiple tips 5 can be used to perform similar functions under different conditions.
As shown in fig. 6, fig. 6 shows that 2 bonding heads 5 are provided to the bonding machine 13 in the width direction of the intermediate blank, two bonding heads 5 are arranged at equal intervals along the joining locus at an arrangement interval of 0.5L, and the stroke of each bonding head 5 is larger than the interval between the adjacent two bonding heads 5. When the joint 3 of the first intermediate blank 2 and the second intermediate blank 1 passes through the bonding machine 13, the two bonding heads 5 start bonding at the same time at a speed V2Moving in the Y direction, the stroke of the bonding head 5 is larger than the distance between two adjacent bonding heads 5. In this way the connection time can be reduced. The stroke of the welding head 5 is larger than the distance between two adjacent welding heads 5, so that the holes at the stroke joint part are eliminated, and the connection is firmer.
By adopting the method and the device provided by the utility model, before finish rolling, the head and tail shapes of the first intermediate billet 2 and the second intermediate billet 1 are cut and are cut into matched shapes, the intermediate billets are connected by the bonder 13 with the body 4 fixed and the welding head 5 movable, the walking space of the connecting equipment is reduced, the space of the production line is saved, the occupied area is reduced, the device can be more widely applied to the reconstruction of the production line with limited built space, and the investment and the maintenance cost of the walking equipment required when the device of the bonder is walking welded are saved; the welding mode adopts one or more of several modes such as friction welding, laser welding, plasma welding and the like to be combined, the welding mode is flexible, mature and reliable, and the range of connectable materials is wide.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the scope of the claims of the present invention.
Claims (6)
1. The utility model provides a hot rolling belted steel does not have first rolling intermediate billet connecting device which characterized in that: the device comprises a roughing mill, a shearing machine, a jointing machine and a finishing mill, wherein the shearing machine comprises a cutter for shearing an intermediate billet, and a welding head is arranged on the jointing machine; the first intermediate billet and the second intermediate billet move at uniform speed at the same speed, the moving direction of the first intermediate billet is the first direction, and the roughing mill, the shearing machine, the jointing machine and the finishing mill are sequentially arranged according to the moving direction of the first intermediate billet.
2. The hot rolled strip endless rolling intermediate billet joining apparatus as claimed in claim 1, characterized in that: and a hot coil box is arranged between the roughing mill and the shearing machine.
3. The hot rolled strip endless rolling intermediate billet joining apparatus as claimed in claim 1, characterized in that: and a deburring machine is arranged between the jointing machine and the finishing mill.
4. The hot rolled strip endless rolling intermediate billet joining apparatus as claimed in claim 1, characterized in that: a straightening machine is also arranged between the roughing mill and the shearing machine.
5. The hot rolled strip endless rolling intermediate billet joining apparatus as claimed in claim 1, characterized in that: the welding head is provided with at least one group.
6. The hot rolled strip endless rolling intermediate billet joining apparatus as claimed in claim 5, wherein: when a plurality of groups of welding heads are arranged, the welding heads are arranged at equal intervals along the connecting track, and the stroke of each welding head is larger than the interval between two adjacent welding heads.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921464316.0U CN210754353U (en) | 2019-09-04 | 2019-09-04 | Hot-rolled strip steel endless rolling intermediate billet connecting device |
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| CN201921464316.0U CN210754353U (en) | 2019-09-04 | 2019-09-04 | Hot-rolled strip steel endless rolling intermediate billet connecting device |
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| CN210754353U true CN210754353U (en) | 2020-06-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110560486A (en) * | 2019-09-04 | 2019-12-13 | 中冶赛迪工程技术股份有限公司 | hot-rolled strip steel endless rolling intermediate billet connecting device and method |
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- 2019-09-04 CN CN201921464316.0U patent/CN210754353U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110560486A (en) * | 2019-09-04 | 2019-12-13 | 中冶赛迪工程技术股份有限公司 | hot-rolled strip steel endless rolling intermediate billet connecting device and method |
| CN110560486B (en) * | 2019-09-04 | 2024-02-23 | 中冶赛迪工程技术股份有限公司 | Device and method for connecting endless rolling intermediate billets of hot rolled strip steel |
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