CN220072804U - Circular arc flat steel vertical rolling pass - Google Patents
Circular arc flat steel vertical rolling pass Download PDFInfo
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- CN220072804U CN220072804U CN202321559912.3U CN202321559912U CN220072804U CN 220072804 U CN220072804 U CN 220072804U CN 202321559912 U CN202321559912 U CN 202321559912U CN 220072804 U CN220072804 U CN 220072804U
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- 229910004534 SiMn Inorganic materials 0.000 description 1
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Abstract
The utility model provides an arc flat steel vertical rolling pass, wherein the height of the hole of the vertical rolling pass is hk, the width of rolling target flat steel is equal to the height of the hole hk, the roll gap of the vertical rolling pass is S, and the value range of the roll gap S is more than or equal to 5 and less than or equal to 50mm; the thickness of the rolling target flat steel is t, the width of the groove bottom of the vertical rolling groove is bk, bk=t+A, wherein A is more than or equal to 2mm and less than or equal to 5mm; the inclination of the hole type side wall of the vertical rolling hole type is phi, and phi is more than or equal to 9 degrees and less than or equal to 12 degrees; the radius of the groove bottom of the vertical rolling groove is R, R= (bk/2)/cos (psi); the width of the notch of the vertical rolling pass is BK, BK= ((hk-S)/2- (R-R sin (psi)). Tan (psi)). 2+bk. The arc flat steel vertical rolling pass improves the radian of the side edge of the arc flat steel, reduces the processing difficulty of the pass, and simultaneously reduces the risk of the double skin at the contact position of the side edge and the plane.
Description
Technical Field
The utility model relates to the technical field of rolling, in particular to an arc flat steel vertical rolling pass.
Background
The flat bar continuous rolling line is mainly used for producing spring flat steel and round steel, and has the following product specification: flat steel: thickness 6-60 mm, width 60-150 mm, round steel: phi 45-phi 65. The produced steel is SiMn series, crMn series, crV series, crMnB series spring flat steel, medium and low carbon alloy steel, tool steel and combined steel. The prior designed circular arc flat steel vertical rolling pass adopts an empirical estimation method, the size of each position is set according to experience, whether the pass is good or not completely depends on the experience of a designer, and the groove bottom and the side wall of the pass adopt an intersecting mode, so that the following technical problems are solved: the forming blade is needed for hole type machining, the blade needs to be polished after the blade is worn, the requirement on the technical level of polishing by workers is high, the cost of the blade is high, the radian radius of the side surface during rolling is quite different from the radian radius of the side wall (GB/T1222-2016) required by the standard by about 1/2T, the requirement on feeding is high, and batch re-skinning and wire drawing are easy to cause due to improper operation.
The original circular arc flat steel vertical rolling pass mainly has the following defects: 1) The hole pattern design is only based on experience, and cannot be specifically quantized; 2) The hole type is difficult to process, and the bottom and the side wall of the hole type are in an intersecting mode, so that only a formed blade can be used for processing; 3) The arc flat steel has a side radian which is larger than that of the national standard, and the radius of the side radian is close to 3/4t; 4) The rolling defect of heavy-skin wiredrawing is easy to occur, and the rolling adjustment is difficult.
Disclosure of Invention
The utility model aims to provide an arc flat steel vertical rolling hole type, which improves the side radian of the arc flat steel, meets the requirement of about 1/2T of the radius of the side radian in GB/T1222-2016, reduces the hole type processing difficulty, and reduces the risk of heavy skin at the contact position of the side and a plane.
In order to achieve the above object, the present utility model provides the following technical solutions:
the arc flat steel vertical rolling pass has a hole height of hk, the width of the rolling target flat steel is equal to the hole height of hk, the roll gap of the vertical rolling pass is S, and the value range of the roll gap S is more than or equal to 5 and less than or equal to 50mm; the thickness of the rolling target flat steel is t, the width of the groove bottom of the vertical rolling groove is bk, bk=t+A, wherein A is more than or equal to 2mm and less than or equal to 5mm; the inclination of the hole type side wall of the vertical rolling hole type is phi, and phi is more than or equal to 9 degrees and less than or equal to 12 degrees; the radius of the groove bottom of the vertical rolling groove is R, R= (bk/2)/cos (psi); the notch width of the vertical rolling pass is BK, bk= ((hk-S)/2- (R-R sin (ψ))) tan (ψ) 2+bk.
Further, in the circular arc flat steel vertical rolling pass, the radius of a groove opening fillet of the vertical rolling pass is r, and r is more than or equal to 2mm and less than or equal to 5mm.
Further, in the circular arc flat steel vertical rolling pass, the larger the rolling reduction is, the larger the value of the hole type side wall inclination psi of the vertical rolling pass is, when the rolling reduction is less than or equal to 20mm, the value of psi is 9-10 degrees, and when the rolling reduction is more than 20mm, the value of psi is 10-12 degrees.
Further, in the circular arc flat steel vertical rolling pass, t=28 mm, hk=b=75mm, ψ=11°, s=10 mm are taken; hk-s=75 mm-10 mm=65 mm; bk=h+A=28+A, since A is 2 mm.ltoreq.A.ltoreq.5 mm, bk is 30 mm.ltoreq.33 mm, where bk=30 mm;
R＝(bk/2)/cos(ψ)＝(30/2)/cos(11)＝15.28mm；
BK＝((hk-S)/2-(R-R*sin(ψ))*tan(ψ)*2+bk＝(65/2-(15.28-15.28*sin(11))*tan(11)*2mm+30mm＝37.83mm。
further, in the circular arc flat steel vertical rolling pass, the radius r of a groove opening fillet of the vertical rolling pass is 2mm.
Further, in the circular arc flat steel vertical rolling pass, the bottom of the vertical rolling pass is tangential to the pass side wall of the vertical rolling pass.
Further, in the circular arc flat steel vertical rolling pass, circular arc transition is adopted between the bottom of the vertical rolling pass and the pass side wall of the vertical rolling pass.
Further, in the circular arc flat steel vertical rolling pass, the groove bottom radius R of the vertical rolling pass is equal to half of the thickness t of the rolling target flat steel.
Further, in the circular arc flat steel vertical rolling pass, a 20-frame two-roll stand is arranged on line in a continuous rolling production line; the rough rolling device comprises 8 rough rolling devices, 8 middle rolling devices and 4 finish rolling devices, wherein the rough rolling devices, the middle rolling devices and the finish rolling devices are arranged in a flat-interchange mode, and the finish rolling devices are provided with 4 loops.
Further, in the circular arc flat steel vertical rolling pass, the last 5 frames are rolled by adopting 3-flat 2 alternative arrangement; the last 5 frames comprise 1 middle rolling and 4 finish rolling frames, wherein the 1 middle rolling is flat rolling, and the 4 finish rolling frames are vertical rolling, flat rolling, vertical rolling and flat rolling in sequence; and 2-pass vertical rolling adopts the vertical rolling pass to open holes, and finally 1-pass flat rolling is performed to obtain a finished product, wherein all the flat rolling adopts plain rolling without holes.
Analysis shows that the embodiment of the utility model discloses an arc flat steel vertical rolling pass, which realizes the following technical effects:
the circular arc flat steel vertical rolling pass is improved by an innovative design method, the empirical design is replaced by formula calculation, the condition that a designer needs enough experience to design is avoided, the designed formula can be mastered only by having pass design basic knowledge, the original pass adopts an intersecting mode to be changed into a tangential mode, the groove bottom and the side wall are in circular arc transition, a forming blade is not needed, the circular arc vertical rolling pass can be machined by only purchasing a standard circular blade, meanwhile, the side surface and the plane of the circular arc flat steel are in transition better due to the tangential mode and the circular arc transition, the radius of the whole radian is close to 1/2t, and the heavy skin wiredrawing caused by the improper thickness of a rolled piece is avoided.
Through the re-modification and processing of the opposite rolling pass system, the circular arc flat steel vertical rolling pass improves the side radian of the circular arc flat steel, meets the requirement of about 1/2T of the radius of the side radian in GB/T1222-2016, reduces the pass processing difficulty, and reduces the risk of heavy skin at the contact position of the side and the plane. At present, 6 ten thousand tons of circular arc flat steel is rolled in a cumulative way by a flat bar wire, and the shape quality of the side face is obviously improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. Wherein:
FIG. 1 is a schematic diagram of an embodiment of the present utility model (modified);
FIG. 2 is a schematic diagram of a prior art (before modification);
FIG. 3 is an enlarged view of a portion of FIG. 2 at A, showing an intersecting pattern;
FIG. 4 is a schematic view of an embodiment of the utility model (after modification);
fig. 5 is a partial enlarged view at B in fig. 4, in a tangential mode.
FIG. 6 is a hole pattern design drawing of a rolling target flat steel with thickness t=28 mm and width b=75 mm according to an embodiment of the present utility model
Detailed Description
The utility model will be described in detail below with reference to the drawings in connection with embodiments. The examples are provided by way of explanation of the utility model and not limitation of the utility model. Indeed, it will be apparent to those skilled in the art that modifications and variations can be made in the present utility model without departing from the scope or spirit of the utility model. For example, features illustrated or described as part of one embodiment can be used on another embodiment to yield still a further embodiment. Accordingly, it is intended that the present utility model encompass such modifications and variations as fall within the scope of the appended claims and their equivalents.
In the description of the present utility model, the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", etc. refer to the orientation or positional relationship based on that shown in the drawings, merely for convenience of description of the present utility model and do not require that the present utility model must be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. The terms "coupled," "connected," and "configured" as used herein are to be construed broadly and may be, for example, fixedly connected or detachably connected; can be directly connected or indirectly connected through an intermediate component; either a wired electrical connection, a radio connection or a wireless communication signal connection, the specific meaning of which terms will be understood by those of ordinary skill in the art as the case may be.
One or more examples of the utility model are illustrated in the accompanying drawings. The detailed description uses numerical and letter designations to refer to features in the drawings. Like or similar designations in the drawings and description have been used to refer to like or similar parts of the utility model. As used herein, the terms "first," "second," "third," and "fourth," etc. are used interchangeably to distinguish one component from another and are not intended to represent the location or importance of the individual components.
Fig. 2 is a schematic diagram of a prior art (before improvement) structure. Fig. 3 is a partial enlarged view of fig. 2 at a, which is an intersecting pattern. The forming blade is needed for hole type machining in the intersecting mode, the blade needs to be polished after the blade is worn, the requirement on the technical level of polishing by workers is high, the cost of the blade is high, the radian radius of the side surface during rolling is quite different from the radian radius of the side wall (GB/T1222-2016) required by the standard by approximately 1/2T, the radian radius of the side surface is close to 3/4T, the requirement on the incoming materials is high, and batch skinning and wiredrawing are easily caused by improper operation.
As shown in fig. 1, 4 to 6, according to an embodiment of the present utility model, there is provided a circular arc flat steel vertical rolling pass having a hole height hk, and a rolling target flat steel width b equal to the hole height hk; the roll gap of the vertical rolling pass is 5-50 mm in value of S; the thickness of the rolling target flat steel is t, the width of the groove bottom of the vertical rolling groove is bk, bk=t+A, wherein A is more than or equal to 2mm and less than or equal to 5mm; the inclination of the hole type side wall of the vertical rolling hole type is phi, and phi is more than or equal to 9 degrees and less than or equal to 12 degrees; the radius of the groove bottom of the vertical rolling groove is R, R= (bk/2)/cos (psi); the width of the notch of the vertical pass is BK, bk= ((hk-S)/2- (R-R sin (ψ))) tan (ψ) 2+bk.
In the above examples, hk represents the hole height, hk=the width of the rolling target flat steel. S represents a roll gap, bk represents a groove bottom width, bk=a thickness t+2mm to 5mm of the rolling target flat steel, (the smaller the value of bk, the better the shape, but the greater the commonality becomes, and vice versa). And ψ represents the hole type sidewall inclination, and ψ=9° to 12 °. R represents the groove bottom radius, r= (bk/2)/cos (ψ). BK represents the width of the notch, bk= ((hk-S)/2- (R-R sin (psi)). Tan (psi)). 2+bk. The size can also be determined by using a CAD drawing method.
Preferably, as shown in FIG. 1, in one embodiment of the present utility model, the groove fillet radius of the edged pass is r,2 mm.ltoreq.r.ltoreq.5 mm. r represents the radius of the groove fillet, r=2mm-5 mm, and the main purpose chamfer is to prevent the hole type from being damaged and scratch the steel. The chamfer angle is favorable for dulling the sharp angle of the notch, preventing the notch from being formed by hole type collision, and preventing the rolled piece from being scratched even if the rolled piece touches the notch.
Preferably, as shown in fig. 1 and 2, in one embodiment of the present utility model, the larger the reduction, the larger the value of the hole sidewall slope ψ of the vertical roll hole. Psi represents the sidewall slope of the hole pattern, psi=9° to 12 ° (large depression takes a large value and small depression takes a small value). When the reduction is less than or equal to 20mm, the value of psi is 9-10 degrees; when the pressing amount is more than 20mm, the value of psi is 10-12 degrees. The value of psi can ensure proper hole type fullness and avoid the defect that the hole type fullness is too large to roll into the ear; or the defect that the rolled piece is unstable when the filling degree is too small.
Preferably, as shown in fig. 3 to 6, in one embodiment of the present utility model, the thickness t=28 mm of the rolling target flat steel, the width b=75 mm of the flat steel, the hole-type sidewall inclination ψ=11°, s=10 mm of the vertical rolling hole type are taken; the width bk=t+A=28+A, and 2 mm.ltoreq.A.ltoreq.5 mm, therefore
The trough bottom width bk=30mm is taken here, wherein bk is more than or equal to 30mm and less than or equal to 33 mm; groove bottom radius r= (bk/2)/cos (ψ) = (30/2)/cos (11) = 15.28mm; width of notch of vertical rolling pass
BK＝((hk-S)/2-(R-R*sin(ψ))*tan(ψ)*2+bk＝((75-10)/2-
(15.28-15.28 sin (11))tan (11) 2mm+30mm=37.83 mm. Preferably, the groove corner radius r of the vertical rolling pass is 2mm.
In the above examples, the present utility model was carried out by rolling: the thickness t=28 mm of the target flat steel to be rolled, the width b=75 mm of the flat steel, and the arc of 1/2t are described as cases: the hole height hk=b=75 mm of the vertical rolling pass, the roll gap S takes a value of 10mm, the groove bottom width bk=28+ (2 to 5) =30 to 33mm, here we take 30mm. Hole type sidewall slope ψ=9° to 12 °, hole type sidewall slope ψ=11° is taken into consideration of the reduction. Then the slot bottom radius r= (bk/2)/cos (ψ) = (30/2)/cos (11) mm=15.28 mm, slot width
BK= ((hk-S)/2- (R-R sin (psi)). Tan (psi)). 2+bk= ((75-10)/2- (15.28-15.28 sin (11)). Tan (11)). 2mm+30mm=37.83 mm. Notch fillet radius r=2 mm-5 mm, where notch fillet radius R is 2mm. In rolling a round flat steel, 2 pass vertical rolling is used to ensure a side arc radius, and a horizontal rolling mill uses no pass rolling, and a 2 pass vertical rolling pass design can significantly improve a side arc radius by adopting the method.
Preferably, as shown in fig. 4 to 6, in one embodiment of the present utility model, the groove bottom of the vertical rolling groove is disposed tangentially to the groove sidewall of the vertical rolling groove. Tangential transition is adopted between the groove bottom of the vertical rolling groove and the groove side wall of the vertical rolling groove. The groove bottom radius R of the vertical rolling groove is approximately equal to half of the thickness h of the rolling target flat steel. The groove bottom of the vertical rolling groove is in tangential transition with the groove side wall of the vertical rolling groove, the turning processing can be performed without a forming blade, the standard round blade can be purchased, meanwhile, the side surface of the circular arc flat steel is in good transition with the plane due to the tangential mode and the circular arc transition, the radius of the whole radian is close to 1/2t, namely, the radius R of the groove bottom of the vertical rolling groove is approximately equal to half of the thickness t of the rolling target flat steel, and heavy skin wire drawing caused by the improper thickness of a rolled piece is avoided. The circular arc flat steel vertical rolling pass improves the side radian of the circular arc flat steel by revising and processing the opposite rolling pass system, meets the requirement of about 1/2T of the side radian radius in GB/T1222-2016, and reduces the pass processing difficulty. While reducing the risk of skinning where the side edges meet the plane. At present, 6 ten thousand tons of circular arc flat steel is rolled in a cumulative way by a flat bar wire, and the shape quality of the side face is obviously improved.
Preferably, as shown in fig. 1 to 5, in one embodiment of the present utility model, a continuous rolling line is provided with 20 rolling stands on-line, wherein, the roughing stands are 8, the middle stands are 8, and the finishing stands are 4; the rough rolling, the medium rolling and the finish rolling are arranged in a flat-interchange mode, and the finish rolling has 4 loops. The continuous rolling production line is provided with 20 two rolling frames on line, wherein 8 rough rolling frames, 8 medium rolling frames and 4 finish rolling frames are arranged on line, the rough rolling frames, the medium rolling frames and the finish rolling frames are arranged in a flat-interchange mode, and the finish rolling frames are provided with 4 loops. The rolling process of the rolled piece adopts micro tension rolling.
Preferably, as shown in fig. 1 to 5, in one embodiment of the present utility model, the last 5 stands are rolled in a 3-in-2 alternating arrangement; the last 5 frames comprise 1 middle rolling and 4 finish rolling frames, wherein the 1 middle rolling is flat rolling, and the 4 finish rolling frames are vertical rolling, flat rolling, vertical rolling and flat rolling in sequence; and (3) carrying out 2-pass vertical rolling by adopting a vertical rolling pass to carry out tapping, and finally carrying out 1-pass flat rolling to obtain a finished product, wherein all the flat rolling adopts plain rollers without pass. And rolling the circular arc flat steel, wherein the last 5 frames are rolled by adopting 3-flat 2-grade alternate arrangement, and finally, 1-pass flat rolling is carried out to obtain a finished product, all flat rolling is carried out by adopting a non-hole type flat roller, and 2-pass vertical rolling is carried out by adopting the vertical rolling hole type.
From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects:
the circular arc flat steel vertical rolling pass is improved by an innovative design method, the empirical design is replaced by formula calculation, the condition that a designer needs enough experience to design is avoided, the designed formula can be mastered only by having pass design basic knowledge, the original pass adopts an intersecting mode to be changed into a tangential mode, the groove bottom and the side wall are in circular arc transition, a forming blade is not needed, the circular arc vertical rolling pass can be machined by only purchasing a standard circular blade, meanwhile, the side surface and the plane of the circular arc flat steel are in transition better due to the tangential mode and the circular arc transition, the radius of the whole radian is close to 1/2t, and the heavy skin wiredrawing caused by the improper thickness of a rolled piece is avoided.
Through the re-modification and processing of the opposite rolling pass system, the circular arc flat steel vertical rolling pass improves the side radian of the circular arc flat steel, meets the requirement of about 1/2T of the radius of the side radian in GB/T1222-2016, reduces the pass processing difficulty, and reduces the risk of heavy skin at the contact position of the side and the plane. At present, 6 ten thousand tons of circular arc flat steel is rolled in a cumulative way by a flat bar wire, and the shape quality of the side face is obviously improved.
The above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model, and various modifications and variations of the present utility model will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. The circular arc flat steel vertical rolling pass is characterized in that the hole height of the vertical rolling pass is hk, the width of rolling target flat steel is equal to the hole height hk, the roll gap of the vertical rolling pass is S, and the value range of the roll gap S is more than or equal to 5 and less than or equal to 50mm;
the thickness of the rolling target flat steel is t, the width of the groove bottom of the vertical rolling groove is bk, bk=t+A, wherein A is more than or equal to 2mm and less than or equal to 5mm;
the inclination of the hole type side wall of the vertical rolling hole type is phi, and phi is more than or equal to 9 degrees and less than or equal to 12 degrees;
the radius of the groove bottom of the vertical rolling groove is R, R= (bk/2)/cos (psi);
the width of the notch of the vertical rolling pass is BK,
BK＝((hk-S)/2-(R-R*sin(ψ))*tan(ψ)*2+bk。
2. the circular arc flat steel vertical rolling pass according to claim 1, wherein the radius of a groove opening fillet of the vertical rolling pass is r, and r is more than or equal to 2mm and less than or equal to 5mm.
3. The circular arc flat steel vertical rolling pass according to claim 1, wherein the larger the reduction, the larger the value of the pass sidewall inclination ψ of the vertical rolling pass,
when the reduction is less than or equal to 20mm, the value of psi is 9-10 degrees,
when the pressing amount is more than 20mm, the value of psi is 10-12 degrees.
4. A circular arc slab vertical rolling pass according to claim 2 wherein t=28 mm, hk=b=75 mm, ψ=11°, s=10 mm;
hk-s=75 mm-10 mm=65 mm;
bk=h+A=28+A, since A is 2 mm.ltoreq.A.ltoreq.5 mm, bk is 30 mm.ltoreq.33 mm, where bk=30 mm;
R＝(bk/2)/cos(ψ)＝(30/2)/cos(11)＝15.28mm；
BK＝((hk-S)/2-(R-R*sin(ψ))*tan(ψ)*2+bk＝(65/2-(15.28-15.28*sin(11))*tan(11)*2mm+30mm＝37.83mm。
5. a circular arc flat steel edger pass according to claim 4 wherein the groove fillet radius r of the edger pass is 2mm.
6. The circular arc flat steel vertical rolling pass of claim 1, wherein the groove bottom of the vertical rolling pass is arranged tangentially to the pass sidewall of the vertical rolling pass.
7. The circular arc flat steel vertical rolling pass of claim 6, wherein a circular arc transition is adopted between a groove bottom of the vertical rolling pass and a pass side wall of the vertical rolling pass.
8. The circular arc slab vertical rolling pass according to claim 1 wherein the groove bottom radius R of the vertical rolling pass is equal to half the rolling target slab thickness t.
9. The circular arc flat bar vertical rolling pass according to claim 1, wherein the continuous rolling production line is provided with 20 rolling stands on line;
the rough rolling device comprises 8 rough rolling devices, 8 middle rolling devices and 4 finish rolling devices, wherein the rough rolling devices, the middle rolling devices and the finish rolling devices are arranged in a flat-interchange mode, and the finish rolling devices are provided with 4 loops.
10. The circular arc flat steel vertical rolling pass according to claim 9, wherein the last 5 stands are rolled in a 3-in-2 alternating arrangement;
the last 5 frames comprise 1 middle rolling and 4 finish rolling frames, wherein the 1 middle rolling is flat rolling, and the 4 finish rolling frames are vertical rolling, flat rolling, vertical rolling and flat rolling in sequence;
and 2-pass vertical rolling adopts the vertical rolling pass to open holes, and finally 1-pass flat rolling is performed to obtain a finished product, wherein all the flat rolling adopts plain rolling without holes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202321559912.3U CN220072804U (en) | 2023-06-16 | 2023-06-16 | Circular arc flat steel vertical rolling pass |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202321559912.3U CN220072804U (en) | 2023-06-16 | 2023-06-16 | Circular arc flat steel vertical rolling pass |
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