Method and control device for stably shearing cold-rolled thin strip steel

Abstract

The invention relates to the technical field of steel rolling equipment, and provides a method for stably shearing cold-rolled thin strip steel, which comprises the following steps: enabling the lower surface of the strip steel to be in a horizontal state through a support roller and a free roller, and controlling a press roller which is arranged opposite to the support roller in the vertical direction to horizontally contact with the upper surface of the strip steel, the strip steel is horizontally gripped between the pressing roller and the supporting roller, and the strip steel is sheared through the cutter head. The invention further provides a control device for stable shearing of the cold-rolled thin strip steel to execute the method. According to the method and the control device, the cutterheads on the two sides of the strip steel can stably shear the strip steel clamped between the pressing roller and the supporting roller, and the technical problem that in the prior art, the middle of the strip steel slightly arches, and consequently edge cutting is poor is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of steel rolling equipment, and more particularly to a method and control device for stable shearing of cold-rolled thin strip steel. Background Art

[0002] At present, there is no pressure roller device in front of the circular shear for cold-rolled thin plates in the domestic metallurgical industry to control the stable operation of the strip steel and the trimming quality. The following problems exist during use: there is no pressure roller in front of the circular shear, and when the circular shear cuts the edge of the strip steel, there is a phenomenon that the thin strip steel arches upward towards the middle, resulting in a deviation of 1-2 mm between the actual width of the strip steel after shearing and the set value. At the same time, there is a phenomenon that the edge cannot be cut; the designed stabilizing roller of the circular shear is far from the circular shear, causing plastic deformation on the surface of the steel plate and leaving indentations; the designed stabilizing roller of the circular shear is far from the circular shear, and the waste edge cut by the circular shear cannot be normally guided along the running direction of the strip steel and often runs out of the guiding chute; the designed stabilizing roller of the circular shear is far from the circular shear, and the strip steel cannot be normally flattened between the circular shear and the stabilizing roller, resulting in uneven trimming on both sides of the circular shear.

[0003] CN 109513982 A discloses a circular shear, which includes a lower supporting roller, an upper pressure roller, a pressing device and circular shear blades. The lower supporting roller is fixed on the platform below the strip steel; the upper pressure roller is fixed on the rotating shaft through the crank arms on the left and right sides. The lower supporting roller, the upper pressure roller and the pressing device are all made of steel core with rubber coating. The lower supporting roller and the upper pressure roller of this prior art can press the middle of the strip steel when shearing the edge of the strip steel to ensure the width dimension accuracy of the strip steel after shearing. However, this prior art raises or lowers the upper pressure roller by rotating the rotating shaft, and there are deficiencies in controlling the rising or falling accuracy of the left and right ends of the upper pressure roller.

[0004] CN 222078113 U discloses an anti-deviation shearing device for trimming cold-rolled strip steel, which includes a base, a processing frame and a feeding frame. The upper end of the feeding frame is fixedly connected with a hydraulic press. The lower end of the hydraulic press is hermetically connected with a hydraulic rod. The lower end of the hydraulic rod is fixedly connected with a first lifting frame. The inner side of the first lifting frame is rotatably connected with a lower pressure roller. This prior art enables the hydraulic rod to stretch under the action of the hydraulic press and enables the first lifting frame to drive the lower pressure roller to move downward under the limiting action of the left-side limiting telescopic rod, so as to be able to clamp at the output end of the cold-rolled strip steel. However, this prior art acts on the first lifting frame through a single hydraulic rod, and there is a situation of uneven acting force.

[0005] Based on this, there is room for improvement in the aspect of the balanced force on the surface of the thin strip steel before shearing cold-rolled thin strip steel. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a method and control device for stable shearing of cold-rolled thin strip steel to solve the technical problem of poor trimming caused by the micro-arching in the middle of the strip steel.

[0007] To achieve the above object, the technical solution provided by the present invention is as follows: A method for stable shearing of cold-rolled thin strip steel, comprising: making the lower surface of the strip steel in a horizontal state through a backup roll and a free roll, and horizontally contacting the upper surface of the strip steel by controlling a pressure roll oppositely arranged to the backup roll in the vertical direction, biting the strip steel horizontally between the pressure roll and the backup roll, and shearing the strip steel through a cutter head.

[0008] In some embodiments, making the lower surface of the strip steel in a horizontal state through a backup roll and a free roll includes: the top surfaces of the backup roll and the free roll are flush, so that the lower surface of the strip steel in contact with the top surfaces of the backup roll and the free roll is in a horizontal state.

[0009] In some embodiments, making the lower surface of the strip steel in a horizontal state through a backup roll and a free roll includes: the height of an adjustment base formed by a backup roll bracket of the backup roll and a free roll base of the free roll is adjustable, so that the top surfaces of the backup roll and the free roll are flush.

[0010] In some embodiments, making the lower surface of the strip steel in a horizontal state through a backup roll and a free roll includes: using two backup rolls and four free rolls located between the two backup rolls to make the lower surface of the strip steel in a horizontal state.

[0011] In some embodiments, making the lower surface of the strip steel in a horizontal state through a backup roll and a free roll includes: the respective top surfaces of the two backup rolls and the respective top surfaces of the four free rolls are flush, so that the lower surface of the strip steel in contact with the respective top surfaces of the two backup rolls and the four free rolls is in a horizontal state.

[0012] In some embodiments, horizontally contacting the upper surface of the strip steel by controlling a pressure roll oppositely arranged to the backup roll in the vertical direction includes: controlling the bottom surface of the pressure roll to remain on a horizontal plane and performing lifting control on the pressure roll, so that the bottom surface of the pressure roll is horizontally in contact with the upper surface of the strip steel.

[0013] In some embodiments, controlling the bottom surface of the pressure roll to remain on a horizontal plane includes: controlling the bottom surface of the pressure roll to remain on a horizontal plane through two guide columns respectively arranged corresponding to the two ends of the pressure roll.

[0014] In some embodiments, performing lifting control on the pressure roll includes: performing lifting control on the pressure roll through a lifting cylinder arranged corresponding to the middle of the pressure roll.

[0015] In some embodiments, controlling the pressure roller disposed opposite to the support roller in the vertical direction to horizontally contact the upper surface of the strip steel includes: using two pressure rollers respectively disposed opposite to each of the two support rollers in the vertical direction, and by controlling the bottom surfaces of the two pressure rollers to remain on the same horizontal plane and controlling the lifting of the two pressure rollers, so that the bottom surfaces of the two pressure rollers horizontally contact the upper surface of the strip steel.

[0016] The present invention provides a control device for stable shearing of cold-rolled thin strip steel, including: a tool box, a pressure roller device, a support roller device, a guiding device and a lifting device. The guiding device is located above the pressure roller device and is respectively connected to the pressure roller device and the tool box. The lifting device is located above the pressure roller device and is respectively connected to the pressure roller device and the tool box. The support roller device is located below the pressure roller device opposite to the pressure roller device in the vertical direction and is connected to the tool box; the guiding sleeve of the guiding device is fixedly connected to the tool box, and one end of the guiding column of the guiding device is fixedly connected to the pressure roller bracket of the pressure roller device; the lifting cylinder of the lifting device is connected to the tool box through a first bracket, and the lifting cylinder is connected to the pressure roller bracket of the pressure roller device through a spherical plain bearing of the lifting device; the support roller bracket of the support roller device is fixedly connected to the tool box, and the support roller of the support roller device and the pressure roller of the pressure roller device are aligned in the vertical direction; the control device executes the above method.

[0017] The beneficial effects of the present invention are: The method and control device for stable shearing of cold-rolled thin strip steel provided by the present invention enable the pressure roller to horizontally contact the upper surface of the strip steel and enable the lower surface of the strip steel to be in a horizontal state through the support roller and the free roller, so that the cutter disks on both sides of the strip steel can stably shear and bite the strip steel between the pressure roller and the support roller, realizing stable shearing of the strip steel, and solving the technical problem of poor edge trimming caused by the middle part of the strip steel being slightly arched in the prior art. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for description in the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other embodiments can also be obtained based on these drawings.

[0019] Figure 1 It is a side view of the control device for stable shearing of cold-rolled thin strip steel provided by an embodiment of the present invention; Figure 2 It is a top view of the control device for stable shearing of cold-rolled thin strip steel provided by an embodiment of the present invention. Detailed Embodiments

[0020] To make the objectives, technical solutions and advantages of the present invention more clearly understood, the following further elaborates on the embodiments of the present invention in detail with reference to specific embodiments and the accompanying drawings.

[0021] It should be noted that all the expressions using "first" and "second" in the embodiments of the present invention are for distinguishing two entities or parameters with the same name but different, and it can be seen that "first" and "second" are only for the convenience of expression and should not be construed as a limitation on the embodiments of the present invention. This will not be elaborated one by one in the subsequent embodiments.

[0022] It should be noted that in the description of the present invention, unless otherwise specified, the meaning of "a plurality" is greater than or equal to two; the orientation or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation on the present invention. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0023] A method for stable shearing of cold-rolled thin strip steel provided by the present invention uses a control device as shown in Figure 1 and Figure 2 which includes: making the lower surface of the strip steel 16 horizontal through the backup roll 7 and the loose roll 13, and horizontally contacting the upper surface of the strip steel 16 by controlling the pressure roll 4 disposed opposite to the backup roll 7 in the vertical direction, biting the strip steel 16 horizontally between the pressure roll 4 and the backup roll 7, and shearing the strip steel 16 by the cutter head 15.

[0024] Compared with the prior art, in the method for stable shearing of cold-rolled thin strip steel of the present invention, by horizontally contacting the upper surface of the strip steel 16 with the pressure roll 4 and making the lower surface of the strip steel 16 horizontal through the backup roll 7 and the loose roll 13, the cutter heads 15 on both sides of the strip steel 16 can stably shear the strip steel 16 bitten between the pressure roll 4 and the backup roll 7, thereby realizing stable shearing of the strip steel 16. It solves the technical problem of poor trimming caused by the middle part of the strip steel 16 being slightly arched in the prior art.

[0025] In some embodiments, making the lower surface of the strip steel 16 horizontal through the backup roll 7 and the loose roll 13 includes: the top surfaces of the backup roll 7 and the loose roll 13 are flush, so that the lower surface of the strip steel 16 in contact with the top surfaces of the backup roll 7 and the loose roll 13 is horizontal.

[0026] In some embodiments, making the lower surface of the strip steel 16 horizontal through the backup roll 7 and the loose roll 13 includes: the height of the adjustment base formed by the backup roll bracket 6 of the backup roll 7 and the loose roll base 14 of the loose roll 13 is adjustable, so that the top surfaces of the backup roll 7 and the loose roll 13 are flush.

[0027] In some embodiments, making the lower surface of the strip 16 horizontal by means of the support rollers 7 and the free rollers 13 includes: using two support rollers 7 and four free rollers 13 located between the two support rollers 7 to make the lower surface of the strip 16 horizontal.

[0028] In some embodiments, making the lower surface of the strip 16 horizontal by means of the support rollers 7 and the free rollers 13 includes: the respective top surfaces of the two support rollers 7 and the respective top surfaces of the four free rollers 13 are flush, so that the lower surface of the strip 16 in contact with the respective top surfaces of the two support rollers 7 and the respective top surfaces of the four free rollers 13 is horizontal.

[0029] In some embodiments, controlling the pressure roller 4 disposed opposite to the support roller 7 in the vertical direction to horizontally contact the upper surface of the strip 16 includes: controlling the bottom surface of the pressure roller 4 to remain on a horizontal plane and controlling the lifting of the pressure roller 4, so that the bottom surface of the pressure roller 4 horizontally contacts the upper surface of the strip 16.

[0030] In some embodiments, controlling the bottom surface of the pressure roller 4 to remain on a horizontal plane includes: controlling the bottom surface of the pressure roller 4 to remain on a horizontal plane by means of two guide columns 8 respectively disposed corresponding to the two ends of the pressure roller 4. For example, through the synchronous action of the two guide columns 8 respectively disposed corresponding to the two ends of the pressure roller 4, the bottom surface of the pressure roller 4 is kept on a horizontal plane.

[0031] In some embodiments, controlling the lifting of the pressure roller 4 includes: controlling the lifting of the pressure roller 4 by means of a lifting cylinder 11 disposed corresponding to the middle of the pressure roller 4.

[0032] In some embodiments, controlling the pressure roller 4 disposed opposite to the support roller 7 in the vertical direction to horizontally contact the upper surface of the strip 16 includes: using two pressure rollers 4 respectively disposed corresponding to each of the two support rollers 7 in the vertical direction, and controlling the bottom surfaces of the two pressure rollers 4 to remain on the same horizontal plane and controlling the lifting of the two pressure rollers 4, so that the bottom surfaces of the two pressure rollers 4 horizontally contact the upper surface of the strip 16.

[0033] In some embodiments, controlling the bottom surfaces of the two pressure rollers 4 to remain on the same horizontal plane includes: controlling the bottom surfaces of the two pressure rollers 4 to remain on the same horizontal plane by means of four guide columns 8 respectively disposed corresponding to the two ends of each of the two pressure rollers 4. For example, through the synchronous action of the four guide columns 8 respectively disposed corresponding to the two ends of each of the two pressure rollers 4, the bottom surfaces of the two pressure rollers 4 are kept on the same horizontal plane.

[0034] In some embodiments, the lifting control of the two pressure rollers 4 includes: synchronously controlling two lifting cylinders 11 respectively arranged corresponding to the middle of each of the two pressure rollers 4 to perform synchronous lifting control on the two pressure rollers 4.

[0035] As Figure 1 and Figure 2 shown, the control device for stable shearing of cold-rolled thin strip steel of the present invention includes: a tool box 1, a pressure roller device, a support roller device, a guiding device and a lifting device. The guiding device is located above the pressure roller device and is respectively connected to the pressure roller device and the tool box 1. The lifting device is located above the pressure roller device and is respectively connected to the pressure roller device and the tool box 1. The support roller device is located below the pressure roller device in the vertical direction opposite to the pressure roller device and is connected to the tool box 1.

[0036] In some embodiments, the pressure roller device includes a first bearing block 2, a pressure roller bracket 3 and a pressure roller 4. The first bearing block 2 is fixed to the pressure roller bracket 3, and the roller shaft end of the pressure roller 4 is installed in the first bearing block 2. For example, the first bearing block 2 is fixed to the end of the pressure roller bracket 3 below the pressure roller bracket 3.

[0037] In some embodiments, the pressure roller device includes two first bearing blocks 2, a pressure roller bracket 3 and a pressure roller 4. The two first bearing blocks 2 are fixed to the pressure roller bracket 3 corresponding to the two ends of the pressure roller bracket 3 and the two first bearing blocks 2 are aligned parallel to each other. The pressure roller 4 is located between the two first bearing blocks 2, and the two end portions of the roller shaft of the pressure roller 4 are respectively installed in a first bearing block 2. For example, the two first bearing blocks 2 are respectively fixed to the two ends of the pressure roller bracket 3 below the pressure roller bracket 3.

[0038] In some embodiments, the support roller device includes a second bearing block 5, a support roller bracket 6 and a support roller 7. The second bearing block 5 is fixed to the support roller bracket 6, and the roller shaft end of the support roller 7 is installed in the second bearing block 5. The support roller bracket 6 is fixedly connected to the tool box 1. For example, the second bearing block 5 is fixed to the support roller bracket 6 above the support roller bracket 6.

[0039] In some embodiments, the support roller 7 and the pressure roller 4 are aligned in the vertical direction.

[0040] In some embodiments, the support roller device includes two second bearings 5, a support roller bracket 6 and a support roller 7. The two second bearing blocks 5 are respectively adjacent to the two ends of the support roller bracket 6 and fixed to the support roller bracket 6 and the two second bearing blocks 5 are aligned parallel to each other. The support roller 7 is located between the two second bearing blocks 5, and the two end portions of the roller shaft of the support roller 7 are respectively installed in a second bearing block 5. The support roller bracket 6 is fixedly connected to the tool box 1. For example, the two second bearing blocks 5 are respectively adjacent to the two ends of the support roller bracket 6 above the support roller bracket 6 and fixed to the support roller bracket 6.

[0041] In some embodiments, the guiding device includes a guiding column 8 and a guiding sleeve 9. The guiding column 8 is sleeved in the guiding sleeve 9. The guiding sleeve 9 is fixedly connected to the tool box 1, and one end of the guiding column 8 is fixedly connected to the pressure roller device. This design ensures that the guiding column 8 is movable relative to the tool box 1, and thus the pressure roller device is movable relative to the tool box 1.

[0042] In some embodiments, one end of the guiding column 8 is fixedly connected to the pressure roller bracket 3. This design ensures that the pressure roller bracket 3 is movable relative to the tool box 1, and thus the pressure roller bracket 3 drives the pressure roller 4 to be movable relative to the tool box 1.

[0043] In some embodiments, the guiding sleeve 9 is fixedly connected to the tool box 1 through the first bracket 10 of the tool box 1.

[0044] In some embodiments, the lifting device includes a lifting cylinder 11 and a spherical plain bearing 12. The lifting cylinder 11 is connected to the tool box 1 through the first bracket 10, and the lifting cylinder 11 is connected to the pressure roller bracket 3 of the pressure roller device through the spherical plain bearing 12.

[0045] In some embodiments, the lifting cylinder 11 is arranged on the first bracket 10. The piston rod of the lifting cylinder 11 is fixedly connected to the spherical plain bearing 12, and the spherical plain bearing 12 is connected to the pressure roller bracket 3 through a mounting seat fixedly connected to the pressure roller bracket 3. This design ensures that the lifting cylinder 11 controls the lifting of the pressure roller bracket 3, and thus controls the lifting of the pressure roller 4. Using the spherical plain bearing 12 between the pressure roller bracket 3 and the lifting cylinder 11 can achieve the effects of automatic alignment and full contact with the upper surface of the strip steel 16.

[0046] In some embodiments, the spherical plain bearing 12 is arranged in the middle of the pressure roller bracket 3 above the pressure roller bracket 3. This design ensures that the acting force of the lifting cylinder 11 on the spherical plain bearing 12 is evenly distributed on the pressure roller bracket 3.

[0047] The control device for stable shearing of cold-rolled thin strip steel of the present invention further includes a free roller 13. The free roller 13 is connected to the tool box 1 through a free roller base 14.

[0048] In some embodiments, the free roller base 14 and the support roller bracket 6 form an adjustment seat. By adjusting the height of the adjustment seat, the top surface of the free roller 13 is made flush with the top surface of the support roller 7. This design ensures that when the support roller 7 and the free roller 13 support the strip steel 16, the lower surface of the strip steel 16 in contact with the top surfaces of the support roller 7 and the free roller 13 is in a horizontal state.

[0049] In some embodiments, the free roller base 14 includes a bottom frame and two side frames. A third bearing seat is respectively arranged on each of the two side frames, and both ends of the roller shaft of the free roller 13 are respectively installed in a third bearing seat.

[0050] In some embodiments, the pressure roller 4, the support roller 7, and the free roller 13 are respectively rubber-coated to reduce the indentation of the strip steel 16 caused by the rotation of the pressure roller 4, the support roller 7, and the free roller 13.

[0051] In some embodiments, the pressure roller 4 is made of a steel core with an outer rubber coating to ensure that the entire outer cylindrical surface of the pressure roller 4 in contact with the strip steel 16 is smooth. Under the action of the lifting cylinder 11, the pressure roller 4 makes a follow-up movement with the strip steel 16, eliminating the phenomenon of indentation damage of the pressure roller 4 caused by the uneven edge of the strip steel 16.

[0052] In some embodiments, the tool box 1 includes a tool disc 15. The tool disc 15 is located on the same side of the pressure roller device and the support roller device, and the tool disc 15 is used to shear the strip steel 16.

[0053] The control device for stable shearing of cold-rolled thin strip steel according to the present invention includes: two tool boxes 1, two pressure roller devices, two support roller devices, four guiding devices, and two lifting devices. The two tool boxes 1 are symmetrically arranged. Each tool box 1 is respectively connected to two guiding devices, a lifting device, and a support roller device. The two guiding devices corresponding to each tool box 1 are located above the corresponding pressure roller device and are respectively connected to the pressure roller device. The lifting device corresponding to each tool box 1 is located above the corresponding pressure roller device and between the corresponding two guiding devices and is connected to the pressure roller device. The support roller device corresponding to each tool box 1 is vertically located below the corresponding pressure roller device relative to the pressure roller device.

[0054] In some embodiments, the support roller 7 of the support roller device corresponding to each tool box 1 is vertically aligned with the pressure roller 4 of the corresponding pressure roller device.

[0055] In some embodiments, the bottom surfaces of the respective pressure rollers 4 of the two pressure roller devices are on the same horizontal plane. This design ensures that the bottom surfaces of the respective pressure rollers 4 of the two pressure roller devices are in a horizontal state and the bottom surfaces of the respective pressure rollers 4 of the two pressure roller devices are in horizontal contact with the upper surface of the strip steel 16.

[0056] In some embodiments, the top surfaces of the respective support rollers 7 of the two support roller devices are flush. This design ensures that the lower surface of the same strip steel 16 in contact with the top surfaces of the respective support rollers 7 of the two support roller devices is in a horizontal state.

[0057] In some embodiments, the two tool boxes 1 each have a first bracket 10, and the two first brackets 10 are on the same horizontal plane.

[0058] In some embodiments, the respective lifting cylinders 11 of the two lifting devices are respectively arranged on the first brackets 10 of the corresponding tool boxes 1. This design ensures that the respective lifting cylinders 11 of the two lifting devices are arranged in the same way relative to the corresponding tool boxes 1, thereby ensuring that the roller brackets 3 of the corresponding roller pressing devices connected to the respective lifting cylinders 11 of the two lifting devices can be kept on the same horizontal plane, so that the two roller brackets 3 can be lifted and lowered synchronously under the action of the respective lifting cylinders 11 to which they are connected.

[0059] In some embodiments, the respective guide sleeves 9 of the two guide devices corresponding to each tool box 1 are fixedly connected to the tool box 1 through the corresponding first brackets 10. The respective guide sleeves 9 of the two guide devices corresponding to each tool box 1 are arranged in the same way relative to the corresponding first brackets 10. Therefore, the four guide sleeves 9 corresponding to the two tool boxes 1 are arranged in the same way, that is, the respective guide sleeves 9 of the four guide devices corresponding to the two tool boxes 1 are arranged at the same height. This design ensures that the guide posts 8 sleeved in the four guide sleeves 9 can be lifted and lowered synchronously.

[0060] In some embodiments, the control device for the stable shearing of cold-rolled thin strip steel further includes four idle rollers 13. The four idle rollers 13 are connected to the two tool boxes 1 through idle roller bases 14. The idle roller bases 14 and the respective support roller brackets 6 of the two support roller devices jointly form an adjustment base. By adjusting the height of the adjustment base, the respective top surfaces of the four idle rollers 13 are made flush with the respective top surfaces of the support rollers 7 of the two support roller devices. This design ensures that when the two support rollers 7 and the four idle rollers 13 support the strip steel 16, the lower surface of the same strip steel 16 in contact with the respective top surfaces of the two support rollers 7 and the respective top surfaces of the four idle rollers 13 is in a horizontal state.

[0061] In some embodiments, the idle roller base 14 includes a base frame and two side frames. Four third bearing seats are respectively arranged on the two side frames. The two end portions of the respective roller shafts of the four idle rollers 13 are respectively installed in a third bearing seat on the two side frames, and the respective roller shafts of the four idle rollers 13 are parallel to each other.

[0062] In some embodiments, each tool box 1 includes a tool disc 15. The tool disc 15 is located on the same side of the two roller pressing devices and the two support roller devices. The respective tool discs 15 of the two tool boxes 1 are located on both sides of the strip steel 16 that is bitten between the pressing rollers 4 of the respective roller pressing devices corresponding to the two tool boxes 1 and the support rollers 7 of the support roller devices.

[0063] The method for the stable shearing of cold-rolled thin strip steel according to the present invention is implemented through the control device for the stable shearing of cold-rolled thin strip steel as follows: During normal production, the height of the adjustment seat composed of the free roller base 14 and the respective support roller brackets 6 of the two support roller devices is adjusted so that the respective top surfaces of the four free rollers 13 are flush with the top surfaces of the respective support rollers 7 of the two support roller devices. The strip steel 16 runs to the pressure rollers 4 of the pressure roller devices and the support rollers 7 of the support devices corresponding to the two knife boxes 1. The respective pressure roller brackets 3 of the two pressure roller devices are kept on the same horizontal plane under the action of the lifting cylinders 11 of the corresponding lifting devices through the synchronous action of the respective guide columns 8 of the corresponding two guide devices. Therefore, the bottom surfaces of the respective pressure rollers 4 of the two pressure roller devices are kept on the same horizontal plane, so that the bottom surfaces of the two pressure rollers 4 are in uniform and horizontal contact with the upper surface of the strip steel 16. At the same time, the two support rollers 7 and the four free rollers 13 ensure that the lower surface of the strip steel 16 is in a horizontal state. The two pressure rollers 4 and the two support rollers 7 make the strip steel 16 bite tightly between the pressure rollers 4 and the corresponding support rollers 7, eliminating the phenomenon of poor trimming caused by the micro-arch in the middle of the strip steel 16. The respective cutter discs 15 of the two cutter boxes 1 shear the two sides of the steel strip 16 , so as to achieve the purpose of smooth shearing of the steel strip 16 .

[0064] After the method for stable shearing of cold-rolled thin strip steel of the present invention is implemented on the strip steel 16 through the control device for stable shearing of cold-rolled thin strip steel, the shearing of the two sides of the strip steel 16 is stable, the yield rate of the strip steel 16 is improved, the width error of the strip steel 16 is controlled within 0.5 mm, and the shearing quality of the edges of the strip steel 16 is improved.

[0065] The method and control device for stable shearing of cold-rolled thin steel strip of the present invention, through the lifting cylinder 11 of the lifting device and the roller support 3 of the roller device connected by the joint bearing 12 and through the synchronous action of the respective guide columns 8 of the corresponding two guide devices, the roller 4 of the roller device can be automatically aligned and the bottom surface is on the horizontal plane, and the roller 4 and the support roller 7 of the support roller device are kept horizontal and parallel, so that the roller 4 and the support roller 7 are in close contact with the steel strip 16 above and below the steel strip 16 respectively, and the force of the roller 4 and the support roller 7 on the steel strip 16 is balanced, eliminating the phenomenon of poor trimming caused by the micro-arch in the middle of the steel strip 16 bitten between the roller 4 and the support roller 7, so as to achieve the purpose of stable shearing of the steel strip 16. The free roller 13 can ensure the support of the thin steel strip 16 below 0.6 mm, ensure the horizontal shearing of the thin steel strip 16, and control the shearing quality and width sizing accuracy of the two sides of the steel strip 16.

[0066] The method and control device for stable shearing of cold-rolled thin strip steel according to the present invention ensure the stable operation of the cold-rolled strip steel 16 at the circular shear without deviation, improve the edge shearing quality and positioning shearing accuracy of the strip steel 16; and can be applied to the longitudinal shearing operation of strip and sheet production units. It eliminates the defects that the transverse force of the two cutter disks 15 on the strip steel 16 during the longitudinal shearing of the circular shear of the strip steel 16 causes the strip steel to be slightly arched, resulting in poor edge shearing and affected width dimension accuracy; the control device cooperates with the circular shear, and the control device presses the strip steel 16 to ensure that the strip steel 16 is always in a flat and stable state during operation.

[0067] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0068] The above-described embodiments merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the invention patent should be subject to the appended claims.

Claims

1. A method for stable shearing of cold-rolled thin strip steel, characterized in that: include: The lower surface of the steel strip is kept in a horizontal state by means of support rollers and free rollers, and the pressure rollers arranged opposite to the support rollers in the vertical direction are controlled to horizontally contact the upper surface of the steel strip, so that the steel strip is horizontally bitten between the pressure rollers and the support rollers, and the steel strip is sheared by the cutter disc.

2. The method for stable shearing of cold-rolled thin strip steel according to claim 1, characterized in that: The step of making the lower surface of the steel strip horizontal by the support roller and the free roller comprises: the top surface of the support roller is flush with the top surface of the free roller so that the lower surface of the steel strip in contact with the top surface of the support roller is horizontal.

3. The method for stable shearing of cold-rolled thin strip steel according to claim 1, characterized in that: The method of making the lower surface of the strip steel horizontal by using the support roller and the free roller comprises: the height of the adjustment seat composed of the support roller bracket of the support roller and the free roller base of the free roller is adjustable so that the top surface of the support roller is flush with the top surface of the free roller.

4. The method for stable shearing of cold-rolled thin strip steel according to claim 1, characterized in that: The method of making the lower surface of the steel strip horizontal by using the support rollers and the free rollers includes: using two of the support rollers and four free rollers located between the two support rollers to make the lower surface of the steel strip horizontal.

5. The method for stable shearing of cold-rolled thin strip steel according to claim 4, characterized in that: The method of making the lower surface of the strip horizontal by using the support rollers and the free rollers includes: the respective top surfaces of the two support rollers and the respective top surfaces of the four free rollers are flush, so that the lower surface of the strip contacted by the respective top surfaces of the two support rollers and the respective top surfaces of the four free rollers is in a horizontal state.

6. The method for stable shearing of cold-rolled thin strip steel according to claim 1, characterized in that: The controlling of the pressure rollers arranged opposite to the supporting rollers in the vertical direction to horizontally contact the upper surface of the steel strip comprises: controlling the bottom surface of the pressure rollers to remain in a horizontal plane and controlling the pressure rollers to rise and fall so that the bottom surface of the pressure rollers is in horizontal contact with the upper surface of the steel strip.

7. The method for stable shearing of cold-rolled thin strip steel according to claim 6, characterized in that: The controlling the bottom surface of the pressing roller to remain on a horizontal plane comprises: controlling the bottom surface of the pressing roller to remain on a horizontal plane by two guide posts respectively arranged corresponding to the two ends of the pressing roller.

8. The method for stable shearing of cold-rolled thin strip steel according to claim 6, characterized in that: The lifting and lowering control of the pressure roller includes: lifting and lowering control of the pressure roller by a lifting cylinder arranged corresponding to the middle of the pressure roller.

9. The method for stable shearing of cold-rolled thin strip steel according to claim 1, characterized in that: The method of controlling the pressure rollers arranged opposite to the supporting rollers in the vertical direction to horizontally contact the upper surface of the steel strip comprises: using two pressure rollers arranged corresponding to each of the two supporting rollers in the vertical direction, respectively, controlling the bottom surfaces of the two pressure rollers to remain on the same horizontal plane and controlling the lifting and lowering of the two pressure rollers, so that the bottom surfaces of the two pressure rollers are in horizontal contact with the upper surface of the steel strip.

10. A control device for stable shearing of cold-rolled thin strip steel, characterized in that: include: A knife box, a pressure roller device, a support roller device, a guide device and a lifting device, wherein the guide device is located above the pressure roller device and is respectively connected to the pressure roller device and the knife box, the lifting device is located above the pressure roller device and is respectively connected to the pressure roller device and the knife box, the support roller device is located below the pressure roller device relative to the pressure roller device in the vertical direction and is connected to the knife box; the guide sleeve of the guide device is fixedly connected to the knife box, and one end of the guide column of the guide device is fixedly connected to the pressure roller bracket of the pressure roller device; the lifting cylinder of the lifting device is connected to the knife box through a first bracket, and the lifting cylinder is connected to the pressure roller bracket of the pressure roller device through a joint bearing of the lifting device; the support roller bracket of the support roller device is fixedly connected to the knife box, and the support roller of the support roller device and the pressure roller of the pressure roller device are aligned in the vertical direction; The control device executes the method according to any one of claims 1-9.

Images