CN217798065U - Steel strip cold rolling device - Google Patents

Abstract

The utility model discloses a cold rolling device of steel band, including the first decoiler, cold rolling mechanism and the second decoiler that set gradually, first decoiler with still be provided with welding set and cutting device between the cold rolling mechanism, welding set includes welding machine and welding bench, the welding machine includes welding frame, transmission lead screw, lead screw drive arrangement, soldered connection, guide arm and angle fine-tuning, the transmission lead screw with lead screw drive arrangement is used for the drive the soldered connection, angle fine-tuning is used for the adjustment the soldered connection angle. Compared with the prior art, the utility model discloses can improve and carry out welded speed and quality to traction plate and strip base to avoid or reduce and cause the influence to steel rolling quality and efficiency.

Description

Steel strip cold rolling device

Technical Field

The utility model relates to a cold rolling technical field, concretely relates to steel band cold rolling device.

Background

At present, the cold-rolled strip steel is widely applied to a plurality of industries such as automobile, shipbuilding, electric power, coal and the like. However, with the scientific and technological progress and social development, the requirements of various industries on the quality, specification, quality and the like of the strip steel are gradually increased. As a common cold rolling processing device for steel, a cold rolling mill is also gradually developing in the direction of high quality, high precision and high efficiency to ensure that strip steel can meet the application standards of various industries. At present, most cold rolling mills on the market adopt a traction plate to pull strip steel for cold rolling, the traction plate is required to be connected with a strip blank through welding before pulling the strip steel, most of welding at the present stage is welding machines and manual assistance, the traction plate and the strip blank are placed, the welding speed is low, the quality is low, and the steel rolling quality and the steel rolling efficiency can be seriously influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: aiming at the defects in the prior art, the steel strip cold rolling device is provided, and the speed and the quality of welding a traction plate and a strip billet can be improved, so that the influence on the steel rolling quality and the steel rolling efficiency is avoided or reduced.

In order to achieve the purpose, the utility model adopts the following technical proposal:

a steel strip cold rolling device comprises a first uncoiler, a cold rolling mechanism and a second uncoiler which are sequentially arranged, wherein a welding device and a cutting device are further arranged between the first uncoiler and the cold rolling mechanism, the welding device comprises a welding machine and a welding table, the welding machine comprises a welding rack, a transmission lead screw, a lead screw driving device, a welding head, a guide rod and an angle fine adjustment mechanism, the transmission lead screw is rotatably arranged on the welding rack, the lead screw driving device is in transmission connection with the transmission lead screw, an arc groove is oppositely arranged on the welding rack, the arc groove and the transmission lead screw are coaxially arranged, an arc sliding block matched with the arc groove in shape is arranged in the arc groove, two ends of the guide rod are respectively connected onto the arc sliding block, the axis of the guide rod is parallel to the axis of the transmission lead screw, the welding head is in threaded connection onto the transmission lead screw and is in sliding connection with the guide rod, the angle fine adjustment mechanism comprises a gear ring, a central gear, a planetary gear and a central gear driving device, the central gear is coaxially arranged between the planetary gear and the central gear and is respectively meshed with the gear, one end of the guide rod is connected with the planetary gear, the guide rod, and the planetary gear driving device is used for smoothly supporting a welded blank to be welded.

Further, a guide roller assembly is further arranged on the welding machine frame.

Furthermore, a channel for a strip blank to pass through is arranged on the welding table, a through groove communicated with the channel is also arranged on the welding table, and the through groove is used for the welding head to weld the strip blank.

Furthermore, two sides of the cold rolling mechanism, which are close to the first uncoiler and the second uncoiler, are respectively provided with a leveling device.

Further, the leveling device includes a leveling frame having a leveling plate and a leveling platform disposed one above the other, one of the leveling plate and the leveling platform being movable up and down relative to the other to adjust a gap therebetween.

Furthermore, the cold rolling mechanism comprises a machine shell, an oil wiping and dust removing mechanism, a rough roller, a fine roller and a reverse rough roller, wherein the oil wiping and dust removing mechanism is arranged outside the machine shell, and the rough roller, the fine roller and the reverse rough roller are sequentially arranged in the machine shell.

Further, cutting device includes cutting bed, plug-in strip and cutting drive arrangement, the plug-in strip set up in the cutting bed top, cutting drive arrangement is used for the drive the plug-in strip for cutting bed up-and-down motion.

Furthermore, the cutting driving device comprises a connecting rod assembly and a power rod, a beam located above the switch blade is arranged on the cutting table, two ends of the connecting rod assembly are respectively connected with the beam and the switch blade, the power rod is arranged on the connecting rod assembly, and the power rod is used for driving the connecting rod assembly to move up and down.

Furthermore, the first uncoiler comprises a first support frame, a second support frame, an uncoiling shaft and an uncoiling driving device, wherein two ends of the uncoiling shaft are respectively connected with the first support frame and the second support frame in a rotating mode, and the uncoiling driving device is used for driving the uncoiling shaft to rotate.

Further, the first uncoiler and the second uncoiler are identical in structure.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the utility model discloses when welding the traction plate to the decoiler with the area base, can make the traction plate motion to the welding bench of area base and first decoiler or second decoiler respectively through first decoiler and second decoiler earlier, then pass through the angle of angle fine-tuning adjustment soldered connection according to the thickness of area base, the last screw rod drive device drive transmission lead screw of rethread rotates to the drive soldered connection removes and connects the traction plate of area base and first decoiler or second decoiler along the transmission lead screw. Therefore, the utility model discloses can weld the traction plate of belting and decoiler through the transmission lead screw drive laser head is automatic to can adjust the belting of soldered connection angle in order to adapt to different thickness through angle fine-tuning. Compared with the prior art, the utility model discloses can improve the welding speed and the welding quality of the traction plate of strip billet and decoiler, this makes the utility model discloses the during operation can be high quality, high efficiency ground steel band pull to can guarantee that the cold rolling work of steel band can go on fast and stably.

Drawings

In order to more clearly illustrate the embodiments of the present invention, the drawings used in the embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.

FIG. 1 is a schematic view of the overall structure of a steel strip cold rolling device according to an embodiment of the present invention;

FIG. 2 is a schematic view of the overall structure of a welding device of a steel strip cold rolling device according to an embodiment of the present invention;

FIG. 3 is an enlarged view of a portion A of FIG. 2;

FIG. 4 is a schematic view of the overall structure of an angle fine-tuning mechanism of a steel strip cold rolling device according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of an overall mechanism of a welding table of a steel strip cold rolling device according to an embodiment of the present invention;

FIG. 6 is a schematic view of the whole mechanism of the leveling device of the steel strip cold rolling device according to the embodiment of the present invention;

fig. 7 is a schematic diagram of the overall mechanism of a cutting device of a steel strip cold rolling device according to an embodiment of the present invention;

fig. 8 is a schematic diagram of the overall mechanism of a first uncoiler of a steel strip cold rolling device according to an embodiment of the present invention.

Reference numerals:

1. a first uncoiler; 11. a first support frame; 12. a second support frame; 13. unwinding the reel; 14. an uncoiling drive device; 15. a mounting frame; 2. a cold rolling mechanism; 21. a housing; 22. an oil wiping and dust removing mechanism; 23. a rough roller; 24. finishing and rolling; 25. a reverse rough roller; 3. a second uncoiler; 4. a welding device; 41. welding machine; 411. welding the frame; 4111. an arc-shaped slot; 4112. an arc-shaped sliding block; 412. a transmission screw rod; 413. a screw driving device; 414. welding a head; 415. a guide bar; 416. an angle fine-tuning mechanism; 4161. a ring gear; 4162. a sun gear; 4163. a planetary gear; 4164. a sun gear drive; 417. a guide roller assembly; 4171. a first guide roller; 4172. a second guide roller; 42. a welding table; 421. a channel; 422. a through groove; 5. a cutting device; 51. cutting table; 511. a cross beam; 52. a knife switch; 53. a cutting drive device; 531. a connecting rod assembly; 532. a power rod; 6. a leveling device; 61. leveling frames; 62. a screed plate; 63. and (5) leveling the platform.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It should be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

As shown in fig. 1-8, the embodiment of the present invention provides a steel strip cold rolling device, including a first uncoiler 1, a cold rolling mechanism 2, and a second uncoiler 3, which are sequentially arranged, a welding device 4 and a cutting device 5 are further arranged between the first uncoiler 1 and the cold rolling mechanism 2, the welding device 4 includes a welding machine 41 and a welding table 42, the welding machine 41 includes a welding rack 411, a transmission lead screw 412, a lead screw driving device 413, a welding head 414, a guide rod 415, and an angle fine adjustment mechanism 416, the transmission lead screw 412 is rotatably arranged on the welding rack 411, the lead screw driving device 413 is in transmission connection with the transmission lead screw 412, the welding rack 411 has arc grooves 4111 arranged oppositely, the arc grooves 4111 and the transmission lead screw 412 are coaxially arranged, arc sliders 4112 matched with the arc grooves are arranged in the arc grooves 4111, two ends of the guide rod 415 are respectively connected to the arc sliders 4112, the axis of the guide rod 415 is parallel to the axis of the transmission lead screw 412, the welding head 414 is in threaded connection with the guide rod 415 and is in sliding connection with the guide rod 415, the angle adjustment mechanism 416 includes a ring 4161, a central gear 4162, a central gear 4163 and a central gear 4164 are arranged between the planetary gear 4164, and a central gear 4164, the planetary gear 4162 is arranged to be capable of being smoothly connected to be used for supporting the planetary gear 4162, and the planetary gear 4164, and the planetary gear 4162, and the planetary gear 4164, and the planetary gear 4162.

It is to be understood that the lead screw driving device 413 and the central gear driving device 4164 include general-purpose devices such as an electric motor, a hydraulic motor, and a pneumatic motor, and the embodiment is not limited thereto.

When the traction plate of the uncoiler and the belt blank are welded in the embodiment, the belt blank and the traction plate of the first uncoiler 1 or the second uncoiler 3 can be moved to the welding table 42 through the first uncoiler 1 and the second uncoiler 3 respectively, then the angle of the welding head 414 is adjusted through the angle fine adjustment mechanism 416 according to the thickness of the belt blank, and finally the welding head 414 is driven to rotate by the screw rod driving device 413, so that the welding head 414 is driven to move along the transmission screw rod 412 and is connected with the belt blank and the traction plate of the first uncoiler 1 or the second uncoiler 3. Therefore, the present embodiment can drive the laser head to automatically weld the strip and the traction plate of the uncoiler through the transmission screw 412, and can adjust the angle of the welding head 414 through the angle fine adjustment mechanism 416 to adapt to the strip with different thicknesses. Compared with the prior art, this embodiment can improve the welding speed and the welding quality of the pulling plate of strip billet and decoiler, and this makes the utility model discloses the during operation can be pulled by high quality, high efficiency ground steel band to can guarantee that the cold rolling work of steel band can go on fast and stably.

When the angle of the welding head 414 is adjusted in the present embodiment, the sun gear 4162 is driven to rotate by the sun gear driving device 4164, the sun gear 4162 drives the planet gear 4163 to rotate around the sun gear 4162, when the planet gear 4163 rotates around the sun gear 4162, the guide rod 415 rotates along the arc groove 4111 under the action of the planet gear 4163 and the arc sliders 4112 at two ends of the planet gear 4163, and the guide rod 415 rotates along the arc groove 4111 to drive the welding head 414 to rotate relative to the driving screw 412, so as to adjust the angle of the welding head 414.

Further, a guide roller assembly 417 is further disposed on the welding frame 411. The guide roller assembly 417 is capable of guiding the strip on the one hand while it is being drawn; on the other hand, the traction plate of the belt blank or the uncoiler can be fixed during welding, so that the belt blank and the traction plate of the uncoiler can be smoothly welded.

Specifically, as shown in fig. 2, the guide roller assembly 417 includes a first guide roller 4171 and a second guide roller 4172 rotatably disposed, and the first guide roller 4171 is disposed above the second guide roller 4172. When the guide roller assembly 417 of the present embodiment is used, a strip blank is inserted between the first guide roller 4171 and the second guide roller 4172, when the strip blank is drawn by the first uncoiler 1 or the second uncoiler 3, the first guide roller 4171 and the second guide roller 4172 rotate to guide the strip blank, and when the welding device 4 welds the strip blank and the traction plate of the first uncoiler 1 or the second uncoiler 3, the first guide roller 4171 and the second guide roller 4172 cooperate to fix the strip blank or the traction plate of the first uncoiler 1 or the second uncoiler 3, so as to ensure that the welding is smoothly performed.

Further, as shown in fig. 5, the welding table 42 has a passage 421 for the strip to pass through, and the welding table 42 also has a through groove 422 communicating with the passage 421, and the through groove 422 is used for the welding head 414 to weld the strip. When the belt blank and the traction plate of the first uncoiler 1 or the second uncoiler 3 are welded in the embodiment, the belt blank and the traction plate of the first uncoiler 1 or the second uncoiler 3 respectively enter the channel 421 and are in butt joint in the channel 421, and the welding head 414 moves along the through groove 422 to weld the butt joint of the belt blank and the first uncoiler 1 or the second uncoiler 3.

It will be appreciated that the configuration of the weld station 42 is not limited to the above configuration, and that other configurations of weld stations 42 may be used in other embodiments, for example, a platform may be used as the weld station 42 in some embodiments.

As shown in fig. 1, in another embodiment of the present invention, the cold rolling mechanism 2 is provided with leveling devices 6 near both sides of the first uncoiler 1 and the second uncoiler 3, respectively. The flattening device 6 is capable of flattening a strip that has not been cold rolled or has been cold rolled to facilitate cold rolling or winding of the strip on an uncoiler.

Further, as shown in fig. 6, the flattening device 6 includes a flattening frame 61, and the flattening frame 61 has a flattening plate 62 and a flattening table 63 disposed up and down, and one of the flattening plate 62 and the flattening table 63 can move up and down relative to the other to adjust a gap therebetween.

It will be appreciated that this embodiment may be used to drive one of the screed 62 and the flattening table 63 up and down relative to the other by means or mechanisms such as telescopic rods, air cylinders or lead screw nuts, to adjust the gap between the two to accommodate strip of different thicknesses.

As shown in fig. 1, in another embodiment of the present invention, the cold rolling mechanism 2 includes a housing 21, an oil-wiping dust-removing mechanism 22, a roughing roll 23, a finishing roll 24, and a reverse roughing roll 25, the oil-wiping dust-removing mechanism 22 is disposed outside the housing 21, and the roughing roll 23, the finishing roll 24, and the reverse roughing roll 25 are sequentially disposed inside the housing 21.

In the prior art, most cold rolling devices are mainly used for cold rolling steel strips through a one-way cold rolling process. However, when steel is rolled by the unidirectional cold rolling process, the grain arrangement on the rolled steel surface is unidirectional, which easily causes uneven thickness of the steel strip and seriously causes the defects of edge cracking, folding, layering and the like of the steel strip.

By arranging the reverse rough roller 25 on the cold rolling device, in the embodiment, after the strip blank moves from the first uncoiler 1 to the second uncoiler 3 to finish the primary cold rolling, the first uncoiler 1 and the second uncoiler 3 can be reversed, and the reverse rough roller 25 and the finishing roller 24 are matched to perform the reverse cold rolling on the strip blank after the primary cold rolling is finished. Compared with the traditional one-way cold rolling process, the method can reduce the possibility of the defects of edge cracking, folding, layering and the like of the steel strip in the rolling process to a certain extent, thereby ensuring the quality of the cold-rolled steel strip, and the rolled steel strip has the advantages of uniform thickness, uniform stress and the like.

As shown in fig. 1 and 7, the cutting device 5 includes a cutting table 51, a knife 52, and a cutting driving device 53, the knife 52 being disposed above the cutting table 51, the cutting driving device 53 being configured to drive the knife 52 to move up and down relative to the cutting table 51.

After the steel strip of the embodiment is cold-rolled, when the joint of the traction plate of the uncoiler and the steel strip moves to the position right below the switch blade 52, the switch blade 52 can be driven by the cutting driving device 53 to move downwards to cut off the joint of the traction plate of the uncoiler and the steel strip, so that the traction plate and the steel strip are separated.

Specifically, as shown in fig. 7, the cutting driving device 53 includes a connecting rod assembly 531 and a power rod 532, a cross beam 511 above the knife switch 52 is disposed on the cutting table 51, two ends of the connecting rod assembly 531 are respectively connected to the cross beam 511 and the knife switch 52, the power rod 532 is disposed on the connecting rod assembly 531, and the power rod 532 is used for driving the connecting rod assembly 531 to move up and down. When the traction plate and the steel belt of the uncoiler are cut off, the power rod 532 can be pushed downwards, the connecting rod assembly 531 is driven to rotate in the process that the power rod 532 moves downwards, and the connecting rod assembly 531 rotates to drive the switch blade 52 to move downwards to cut off the traction plate and the steel belt of the uncoiler.

It is understood that in some other embodiments, other types of devices such as an air cylinder can be used as the cutting driving device 53, and the embodiment is not limited thereto.

As shown in fig. 8, in another embodiment of the present invention, the first uncoiler 1 includes a first support frame 11, a second support frame 12, an uncoiling shaft 13 and an uncoiling driving device 14, two ends of the uncoiling shaft 13 are respectively rotatably connected with the first support frame 11 and the second support frame 12, and the uncoiling driving device 14 is used for driving the uncoiling shaft 13 to rotate.

The unwinding drive device 14 of the present embodiment includes a drive device such as an electric motor, a hydraulic motor, or a pneumatic motor. For example, in a specific embodiment, the unwinding driving device 14 is a motor, a mounting bracket 15 for mounting the motor is disposed on one side of the first support frame 11 or the second support frame 12, and the motor is in transmission connection with one end of the unwinding shaft 13 close to the mounting bracket 15.

Preferably, the first unwinder 1 and the second unwinder 3 are identical in structure.

Of course, in other embodiments, the structure of the first uncoiler 1 and the second uncoiler 3 may be different, and this embodiment is not limited to this.

When the steel strip cold rolling device provided by the embodiment works, firstly, a strip is installed on the first uncoiler 1 and uncoiled through the first uncoiler 1, when the initial end of the strip reaches the welding table 42, the first uncoiler 1 stops working, then the second uncoiler 3 is started to enable the traction plate of the second uncoiler to move towards the direction of the first uncoiler 1, and when the traction plate of the second uncoiler 3 reaches the welding table 42 through the cold rolling mechanism 2 and is in butt joint with the initial end of the strip, the second uncoiler 3 is closed. Subsequently, the angle of the laser head is adjusted by an angle fine adjustment mechanism 416 according to the thickness of the strip; after the angle adjustment is finished, the driving screw 412 and the screw driving device 413 drive the welding head 414 to move so as to weld the traction plate and the belt blank of the second uncoiler 3. After welding, the second uncoiler 3 is started to drive the strip blank to be leveled through the leveling device 6, the second uncoiler 3 brings the strip blank into the cold rolling mechanism 2 after leveling, the strip blank enters the cold rolling shell after being cleaned by the oil wiping and dust removing mechanism 22, and one-way rolling is completed through the rough roller 23 and the fine roller 24. After the unidirectional rolling is finished, the strip is flattened by a flattening device 6 between the cold rolling mechanism 2 and the second uncoiler 3 and then is wound on the second uncoiler 3. When the tail end of the strip comes to the welding table 42, the second uncoiler 3 is closed, the first uncoiler 1 is started to enable the traction plate of the first uncoiler to move to the welding table 42 to be in butt joint with the tail end of the strip, then the first uncoiler 1 is closed, and the welding device 4 is used for welding the traction plate of the first uncoiler 1 and the tail end of the strip. And after the welding is finished, simultaneously starting the first uncoiler 1 and the second uncoiler 3 to finish the unidirectional rolling of the rest part of the strip blank. When the strip is completely wound on the second uncoiler 3, the first uncoiler 1 and the second uncoiler 3 are simultaneously reversed to perform reverse rolling, the strip enters the cold rolling mechanism 2 to perform reverse rolling after being leveled by the leveling device 6 between the second uncoiler 3 and the cold rolling mechanism 2, is leveled by the leveling device 6 between the cold rolling mechanism 2 and the first uncoiler 1 after being rolled, and is then wound on the first uncoiler 1 to complete reverse rolling. When the initial end of the strip and the traction plate of the second uncoiler 3 reach the cutting device 5, the first uncoiler 1 and the second uncoiler 3 are closed at the same time, and the traction plate of the second uncoiler 3 and the initial end of the strip are cut off by the cutting device 5, so that the separation of the strip and the traction plate is completed. Finally, the first uncoiler 1 is started to wind all the remaining strip onto the first uncoiler 1.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.

Claims (10)

1. A steel strip cold rolling device is characterized by comprising a first uncoiler (1), a cold rolling mechanism (2) and a second uncoiler (3) which are sequentially arranged, a welding device (4) and a cutting device (5) are further arranged between the first uncoiler (1) and the cold rolling mechanism (2), the welding device (4) comprises a welding machine (41) and a welding table (42), the welding machine (41) comprises a welding rack (411), a transmission lead screw (412), a lead screw driving device (413), a welding head (414), a guide rod (415) and an angle fine adjustment mechanism (416), the transmission lead screw (412) is rotatably arranged on the welding rack (411), the lead screw driving device (413) is in transmission connection with the transmission lead screw (412), an arc-shaped groove (4111) which is oppositely arranged is formed in the welding rack (411), the arc-shaped groove (4111) and the transmission lead screw (412) are coaxially arranged, an arc-shaped slider (4112) which is matched with the shape of the arc-shaped groove (4112) is arranged in the arc-shaped groove (4111), two ends of the guide rod (415) are respectively connected with the transmission slider (4112), and the axis of the transmission lead screw (415) is parallel to the axis of the guide rod (414) and is connected with the axis of the transmission lead screw (414), the angle fine adjustment mechanism (416) comprises a gear ring (4161), a central gear (4162), a planetary gear (4163) and a central gear driving device (4164), the gear ring (4161) and the central gear (4162) are coaxially arranged, the planetary gear (4163) is arranged between the gear ring (4161) and the central gear (4162) and is respectively meshed with the gear ring (4161) and the central gear (4162), one end of a guide rod (415) is connected with the planetary gear (4163), the central gear driving device (4164) is used for driving the central gear (4162) to rotate, and the welding table (42) is used for supporting a strip blank to ensure that a welding head (414) can smoothly weld the strip blank.

2. Cold rolling device for steel strips according to claim 1, characterised in that a guide roll assembly (417) is also provided on the welding stand (411).

3. Cold rolling device for steel strips according to claim 1, characterised in that said welding station (42) is provided with a passage (421) for the strip to pass through, said welding station (42) is further provided with a through slot (422) communicating with said passage (421), said through slot (422) being intended for said welding head (414) to weld said strip.

4. Cold rolling device for steel strips according to claim 1, characterised in that the cold rolling means (2) are provided with levelling means (6) close to the first (1) and second (3) unwinder sides, respectively.

5. Cold strip rolling plant according to claim 4, characterised in that the levelling means (6) comprise a levelling stand (61), on which levelling stand (61) there are arranged one above the other a levelling plate (62) and a levelling table (63), one of the levelling plate (62) and the levelling table (63) being movable up and down relative to the other to adjust the gap between them.

6. The cold-rolling device for steel strips according to claim 1, wherein the cold-rolling mechanism (2) comprises a machine shell (21), an oil wiping and dust removing mechanism (22), a roughing roller (23), a finishing roller (24) and a reverse roughing roller (25), the oil wiping and dust removing mechanism (22) is arranged outside the machine shell (21), and the roughing roller (23), the finishing roller (24) and the reverse roughing roller (25) are sequentially arranged in the machine shell (21).

7. Device for cold rolling of steel strip according to claim 1, characterized in that the cutting device (5) comprises a cutting table (51), a knife (52) and a cutting drive (53), the knife (52) being arranged above the cutting table (51), the cutting drive (53) being adapted to drive the knife (52) up and down in relation to the cutting table (51).

8. The cold rolling device of steel strips according to claim 7, wherein the cutting driving device (53) comprises a connecting rod assembly (531) and a power rod (532), the cutting table (51) is provided with a cross beam (511) above the switch blade (52), two ends of the connecting rod assembly (531) are respectively connected with the cross beam (511) and the switch blade (52), the power rod (532) is arranged on the connecting rod assembly (531), and the power rod (532) is used for driving the connecting rod assembly (531) to move up and down.

9. A cold rolling device for steel strips according to claim 1, wherein the first uncoiler (1) comprises a first support frame (11), a second support frame (12), an uncoiling shaft (13) and an uncoiling driving device (14), wherein the two ends of the uncoiling shaft (13) are respectively and rotatably connected with the first support frame (11) and the second support frame (12), and the uncoiling driving device (14) is used for driving the uncoiling shaft (13) to rotate.

10. Cold rolling device for steel strips according to claim 9, characterised in that said first unwinder (1) and said second unwinder (3) are structurally identical.

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