CN216501517U - Steel plate hot longitudinal cutting production line - Google Patents
Steel plate hot longitudinal cutting production line Download PDFInfo
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- CN216501517U CN216501517U CN202122396155.XU CN202122396155U CN216501517U CN 216501517 U CN216501517 U CN 216501517U CN 202122396155 U CN202122396155 U CN 202122396155U CN 216501517 U CN216501517 U CN 216501517U
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Abstract
The utility model discloses a hot longitudinal cutting production line for a steel plate, which comprises a centering device, a punching and shearing device, a heat supplementing device, a first-pass pre-cutting device, a second-pass pre-cutting device and a cutting device which are sequentially arranged along the feeding direction of the steel plate, wherein the first-pass pre-cutting device comprises first disc shears symmetrically arranged on the upper side and the lower side of the steel plate, the second-pass pre-cutting device comprises second disc shears symmetrically arranged on the upper side and the lower side of the steel plate, the first-pass pre-cutting device is used for reducing the thickness of the steel plate at a cutting position to a first thickness, the second-pass pre-cutting device is used for reducing the thickness of the steel plate from the first thickness to a second thickness at the cutting position, and the cutting device is used for completely cutting the steel plate at the cutting position. According to the hot longitudinal cutting production line for the steel plate, the two-pass pre-dividing and cutting device is additionally arranged in front of the cutting device, and the steel plate is not hot before pre-dividing and cutting, so that the production efficiency can be ensured, and the forming quality of the edge part can be improved.
Description
Technical Field
The utility model relates to the field of metallurgy, in particular to a hot longitudinal line of a steel plate
Background
At present, the longitudinal cutting of the steel plate is usually carried out in a cold state, because the cut of the steel plate in a hot state can not be directly cut off, or the defects of burrs, pits and other parts are easily generated during cutting off, but the longitudinal cutting of the steel plate in the hot state can be directly carried out after the rolling of the steel plate is finished, the rolling waste heat can be fully utilized, and the efficiency is higher; therefore, at present, the technology and the equipment for longitudinally cutting the steel plate in a hot state exist, but the edge part quality of the steel plate formed by longitudinally cutting the steel plate by using the existing hot longitudinal cutting production technology of the steel plate is not ideal.
Disclosure of Invention
In view of the above-mentioned disadvantages of the prior art, an object of the present invention is to provide a hot slitting line for steel sheet to improve the quality of the edge of the formed steel strip and reduce the edge defects.
In order to achieve the above objects and other related objects, the technical solution of the present invention is as follows:
the utility model provides a hot slitting production line of steel sheet, includes along the centering device, the punching shear device, the concurrent heating device that establish according to the preface of the direction of feed of steel sheet, first pass cut device, second pass in advance cut device and cutting device, wherein, first pass cuts the device in advance including the first circle shear of symmetrical arrangement both sides about the steel sheet, and the second pass cuts the device in advance including the second circle shear of symmetrical arrangement both sides about the steel sheet, first pass cuts the device in advance and is used for the steel sheet thickness attenuate to first thickness at the position of cutting, the second pass cuts the device in advance and is used for cutting the thickness of steel sheet from first thickness attenuate to second thickness at the position of cutting, cutting device is used for cutting off the steel sheet at the position of cutting completely.
Optionally, the punching and shearing device is used for cutting the head of the steel plate, and a cutting feed notch is formed at a cutting position corresponding to the head after the head is cut.
Optionally, the punching and shearing device is a compound die;
or
The punching and shearing device comprises a head cutting sub-device and a punching sub-device.
Optionally, the heat-compensating device is configured to compensate heat for the surface of the steel plate, and a heat-compensating region of the heat-compensating device corresponds to a local position of the surface of the steel plate corresponding to the slitting position, or corresponds to the entire surface of the steel plate.
Optionally, the rolling depth of the first circle shear on one side is one fourth of the thickness of the steel plate; the depth distance between the top ends of the cutting edges of the second circle shears on the two sides is less than or equal to 3 mm.
Optionally, the cutting edge of the first circle shear is a rolling cutting edge, the cutting edge of the second circle shear is a shearing cutting edge, the thickness of the rolling cutting edge is greater than that of the shearing gap, and the rolling depth of the rolling cutting edge is less than that of the shearing cutting edge.
Optionally, the cross section of the rolling cutting edge is circular arc or triangular, and the shearing cutting edge is triangular.
Optionally, the cutting device is one of an ion cutting device, a laser cutting device, a flame cutting device and a hot saw cutting device.
Optionally, the steel plate hot longitudinal cutting production line further comprises a scrap-crushing device, and the scrap-crushing device is used for crushing scrap edges cut by the cutting device.
According to the hot longitudinal cutting production line for the steel plate, the two-pass pre-dividing device is additionally arranged in front of the cutting device, and the steel plate is not hot before pre-dividing, so that the production efficiency can be ensured, and the forming quality of the edge part can be improved.
Drawings
FIG. 1 is an exemplary simplified schematic diagram of a hot slitting line for steel sheet according to the present invention;
FIG. 2 is a schematic view of the cut-off head of the punching and shearing device of the present invention on a steel plate;
FIG. 3 is a schematic view of a steel sheet formed after the punching and shearing device of the present invention punches and shears a steel sheet;
FIG. 4 is a schematic diagram showing the arrangement of the two-pass slitting device and the cutting device according to the present invention;
FIG. 5 is a schematic view of the first-pass pre-slitting device slitting a steel plate;
FIG. 6 is a schematic view of the second-pass pre-slitting device slitting a steel plate;
FIG. 7 is a schematic diagram of the positions of the rolling cutting edge, the rolling gap and the steel plate during the first pre-slitting;
FIG. 8 is a schematic diagram of the positions of the cutting edge, the cutting gap and the steel plate during the first pre-slitting;
FIG. 9 is a schematic view of the location of the extrusion zone and compensation zone on the steel plate.
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 become apparent to those skilled in the art from the present disclosure.
Referring to fig. 9, the hot slitting line for steel sheets according to the present invention includes:
a centering device for adjusting the slitting position to a predetermined position, where the slitting position is a dividing line, for example, the slitting position in fig. 4 is a dividing line B;
the punching and shearing device is used for cutting the head of the steel plate, and the area a3 of the head of the steel plate A is cut off, see FIG. 2;
the heat supplementing device is used for locally supplementing heat to the surface of the steel plate or wholly supplementing heat to the surface of the steel plate;
the first-pass pre-slitting device 1, referring to fig. 5, the first-pass pre-slitting device 1 comprises first disc shears 11 symmetrically arranged on the upper side and the lower side of a steel plate, and the first-pass pre-slitting device 1 is used for reducing the thickness of the steel plate at a slitting position to a first thickness;
the second-pass pre-slitting device 2, referring to fig. 6, the second-pass pre-slitting device 2 comprises second disc shears 21 symmetrically arranged on the upper side and the lower side of the steel plate, and the second-pass pre-slitting device 2 is used for reducing the thickness of the steel plate from the first thickness to the second thickness at a slitting position;
the cutting device 3, see fig. 4, for completely cutting the steel sheet a at the slitting position, divides the steel sheet into two steel sheets a1 and a 2. In practical implementation, the cutting device 3 may be an ion cutting device, a laser cutting device, a flame cutting device or a hot saw cutting device.
According to the hot longitudinal cutting production line for the steel plate, the heat supplementing device is used for supplementing heat to the cutting position, so that the subsequent cutting efficiency is improved, and before the steel plate is completely cut, the two-pass pre-cutting device is additionally arranged, so that the quality of the edge part formed by final longitudinal cutting can be greatly improved by performing two-pass pre-cutting.
In some embodiments, the punching and shearing device is used for cutting the head of the steel plate and forming a feed gap A at the corresponding cutting position of the head after the head is cut0. The punching and shearing device is arranged, so that when two subsequent pre-cutting passes are carried out, the corresponding first disk shear 11 and the second disk shear 21 can be aligned with the feed gap A0As starting point for the preliminary cutting, the feed gap a0The limiting of the disc shear is facilitated at the initial stage of the two-time pre-slitting, the deflection amplitude of the disc shear during feeding is reduced, and the slitting position precision of the two-time pre-slitting is improved.
In the actual implementation process, in order to realize the purpose of cutting the head first and then punching, the punching device may include a single-process head cutting sub-device and a single-process punching sub-device, which are respectively used for cutting the head and punching.
In some embodiments, the heat supplementing device is used for supplementing heat to the surface of the steel plate, the heat supplementing area of the heat supplementing device corresponds to a local position of the surface of the steel plate corresponding to the slitting position, or the heat supplementing area of the heat supplementing device corresponds to the whole surface of the steel plate, so that the area of the slitting position close to the surface is easy to deform under the action of external force, the deformation speed is high, the follow-up pre-slitting efficiency is improved, and the follow-up slitting quality is guaranteed to reach the expectation.
In some embodiments, referring to fig. 5 and 7, the rolling depth of the single-sided first shear disk 11 is one fourth of the thickness of the steel plate, i.e. the first thickness is equal to one half of the thickness of the steel plate; referring to fig. 6 and 8, the depth distance d between the cutting edge tips of the second circle shears 21 on both sides is less than or equal to 3 mm. The thickness of the steel plate is different, the rolling depth is different when the steel plate is slit in the first pass, the thickness reserved at the slitting position is divided in the second pass is very thin, and the quality of the edge of the steel plate with different thicknesses after longitudinal slitting and slitting can be guaranteed reliably.
In some embodiments, referring to fig. 7 to 9 in combination, the edge of the first shear disk 11 is the rolling edge 111, the edge of the second shear disk 21 is the shearing edge 211, the thickness of the rolling edge 111 is greater than that of the shearing edge 211, and the rolling depth of the rolling edge 111 is less than that of the shearing edge 211, so that the width of the rolling gap a1 is greater than that of the shearing gap a2, and the rolling depth of the rolling gap a1 is less than that of the shearing gap a 2.
Referring to fig. 7 to 9 in combination, since the width of the rolling notch a1 is wider than the width of the shearing notch a2, that is, the width of the rolling notch a1 at the surface of the steel plate is wider than the thickness of the cutting edge of the second circle shear 21 (i.e., the shearing edge 211), so that a gap (also referred to as a compensation zone m) is formed between the cutting edge of the second circle shear 21 and the rolling notch a1 when the cutting edge enters the rolling notch a1, and when the second circle shear 21 presses the rolling notch a1 deeper (also referred to as an extrusion zone n), the metal flow in the extrusion zone flows to the compensation zone m, so that in the pre-shearing process, the metal flow flows in the cross-sectional area of the steel plate, which is beneficial to further improve the edge quality of the steel plate after splitting.
In fig. 7, the first rotary shears 11 have circular-arc-shaped cutting edges, and the rolling gap a1 has a circular-arc-shaped cross section, while in fig. 8, the second rotary shears 21 have triangular cutting edges, and the cutting gap a2 has a triangular shape, so that the metal flow in the extrusion region n flows to the compensation region m during pre-shearing. Of course, in practical implementation, the first disk 1 may also be a triangular cutting edge, so that the rolling gap a1 may also be triangular or other shapes.
In some embodiments, the effective rolling cross-sectional area of the rolling edge 111 is equal to the effective rolling cross-sectional area of the shearing notch a2, which is beneficial to make the metal flow extruded from the extrusion region n just fill the compensation region m, and is further beneficial to ensure the edge quality after the steel plate is stripped.
In some embodiments, the steel plate hot slitting line further includes a tensioning mechanism (not shown) for tensioning the steel plate during the opposite-edge rolling process of the steel plate, and applying a tensioning force to the steel plate, wherein the tensioning force is perpendicular to the transverse direction in the feeding direction of the steel plate, and the position of the tensioning mechanism corresponds to the position corresponding to the first pass slitting device. The tensioning mechanism can avoid the metal flow at the slitting position from being extruded out of the cross section range of the steel plate, bulges or other defects are formed around the slitting position, space is provided for the subsequent extrusion of the second disc shear 21, and the improvement of the edge quality of the steel plate after slitting is facilitated. When the width of the rolling notch A1 is larger than that of the shearing notch A2 and the tensioning mechanism is arranged, in the two-time pre-slitting process, metal flow always flows in the section range of the steel plate, and the quality of the edge of the steel plate after final slitting can be greatly improved by the pre-rolling and pre-shearing combination mode.
In some embodiments, referring to fig. 1, the steel plate hot slitting line further comprises a scrap chopper for chopping scrap cut by the cutting device.
Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (9)
1. The utility model provides a hot slitting production line of steel sheet which characterized in that: including the centering device, the shearing device, the concurrent heating device, the first time of establishing according to the preface along the direction of feed of steel sheet cut device, second pass cut device and cutting device in advance, wherein, the first time cuts the device in advance including the first circle shear of symmetrical arrangement both sides about the steel sheet, and the second pass cuts the device in advance including the second circle shear of symmetrical arrangement both sides about the steel sheet, the first time cuts the device in advance and is used for in the steel sheet thickness attenuate to first thickness of cutting the position, the second pass cuts the device in advance and is used for cutting the position with the steel sheet thickness from first thickness attenuate to second thickness, cutting device is used for cutting the steel sheet completely in cutting the position.
2. The steel plate hot slitting line according to claim 1, characterized in that: the punching and shearing device is used for cutting the head of the steel plate, and a cutting feed notch is formed at the position of the corresponding cutting position of the head after the head is cut.
3. The steel plate hot slitting line according to claim 2, characterized in that:
the punching and shearing device is a compound die;
or
The punching and shearing device comprises a head cutting sub-device and a punching sub-device.
4. The steel plate hot slitting line according to claim 1, characterized in that: the heat supplementing device is used for supplementing heat to the surface of the steel plate, and a heat supplementing area of the heat supplementing device corresponds to a local position of the surface of the steel plate corresponding to the slitting position or corresponds to the whole surface of the steel plate.
5. The steel plate hot slitting line according to claim 1, characterized in that: the rolling depth of the first disc shear on one side is one fourth of the thickness of a steel plate; the depth distance between the top ends of the cutting edges of the second circle shears on the two sides is less than or equal to 3 mm.
6. The steel plate hot slitting line according to claim 4, characterized in that: the cutting edge of the first circle shear is a rolling cutting edge, the cutting edge of the second circle shear is a shearing cutting edge, the thickness of the rolling cutting edge is larger than that of the shearing cutting edge, and the rolling depth of the rolling cutting edge is smaller than that of the shearing cutting edge.
7. The steel plate hot slitting line according to claim 6, characterized in that: the section of the rolling cutting edge is arc-shaped or triangular, and the shearing cutting edge is triangular.
8. The steel plate hot slitting line according to claim 1, characterized in that: the cutting device adopts one of an ion cutting device, a laser cutting device, a flame cutting device and a hot saw cutting device.
9. The steel plate hot slitting line according to claim 1, characterized in that: still include the scrap edge device, the scrap edge device is used for broken warp scrap edge material that cutting device cut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122396155.XU CN216501517U (en) | 2021-09-30 | 2021-09-30 | Steel plate hot longitudinal cutting production line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122396155.XU CN216501517U (en) | 2021-09-30 | 2021-09-30 | Steel plate hot longitudinal cutting production line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216501517U true CN216501517U (en) | 2022-05-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122396155.XU Active CN216501517U (en) | 2021-09-30 | 2021-09-30 | Steel plate hot longitudinal cutting production line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216501517U (en) |
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2021
- 2021-09-30 CN CN202122396155.XU patent/CN216501517U/en active Active
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