CN113976636A - Production device and method for hot-rolled deformed steel bar - Google Patents
Production device and method for hot-rolled deformed steel bar Download PDFInfo
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- CN113976636A CN113976636A CN202111281584.0A CN202111281584A CN113976636A CN 113976636 A CN113976636 A CN 113976636A CN 202111281584 A CN202111281584 A CN 202111281584A CN 113976636 A CN113976636 A CN 113976636A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 32
- 239000010959 steel Substances 0.000 title claims abstract description 32
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims description 20
- 238000005096 rolling process Methods 0.000 claims abstract description 52
- 230000007246 mechanism Effects 0.000 claims abstract description 47
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 230000011218 segmentation Effects 0.000 claims abstract description 9
- 239000000919 ceramic Substances 0.000 claims description 12
- 230000003247 decreasing effect Effects 0.000 claims 1
- 238000005098 hot rolling Methods 0.000 claims 1
- 238000005520 cutting process Methods 0.000 abstract description 14
- 239000000463 material Substances 0.000 description 9
- 230000000875 corresponding effect Effects 0.000 description 6
- 238000010008 shearing Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/58—Roll-force control; Roll-gap control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
- B21B38/06—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring tension or compression
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B39/14—Guiding, positioning or aligning work
- B21B39/16—Guiding, positioning or aligning work immediately before entering or after leaving the pass
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- Metal Rolling (AREA)
Abstract
The invention relates to a production device of hot-rolled deformed steel bar, which comprises pre-cutting pre-rolling, pre-cutting rolling and cutting rolling, wherein the pre-cutting rolling is provided with a first inlet guide, the cutting rolling is provided with a second inlet guide, the structures of the first inlet guide and the second inlet guide respectively comprise a guide base, the rear end of the guide base is hinged through a vertical shaft, the front end of the guide base is provided with a transverse adjusting mechanism, the transverse adjusting mechanism comprises transverse top heads arranged on two sides of the guide base, the tail part of the transverse top head is connected with a front hydraulic cylinder, the oil circuit of the front hydraulic cylinder is connected with a rear hydraulic cylinder, a piston column of the rear hydraulic cylinder is driven by a lead screw, the lead screw is driven by a servo motor, and the sectional area of the front hydraulic cylinder is larger than that of the rear hydraulic cylinder; the servo motor is connected with a first line difference detection mechanism. The scheme can be used for carrying out online adjustment according to the line difference condition in the rolling process, so that the yield of multi-line segmentation rolling is improved, and the rolling efficiency of the deformed steel bar is improved.
Description
Technical Field
The invention relates to a device and a method for producing hot-rolled deformed steel bar, belonging to the technical field of deformed steel bar preparation.
Background
The cutting rolling can greatly improve the production efficiency of the deformed steel bar, thereby improving the yield. However, the difficulty of multi-line cutting and rolling of more than three lines is high, a large amount of steel scraps are easily generated due to improper control, and the yield is low. The biggest difficulty of multi-line splitting rolling lies in line difference control among lines, uneven cross section flow distribution among line grooves during precutting, larger length difference of rolled pieces coming out of the line grooves after finished product rolling, influence on alignment, multiple length shearing, upper cooling bed and fixed length shearing of the rolled pieces at the back, and easy steel piling, steel disorder, distortion and large head and tail shearing loss.
The main factors causing the line difference comprise the pre-cutting hole-dividing design and the adjustment of the guide device. The control line difference is adopted in the prior art, the center line of the guide device is strictly ensured to be superposed with the center line of the rolling mill before rolling, the guide device is ensured to be stably installed, and the guide device does not swing during rolling.
The adjustment precision of the guide depends on the technical level and the responsibility of an operator, and the reliability is low. In the rolling process, the billet has impact on the guide after entering the guide, and the unstable impact force continuously exists in the rolling process, so that the guide is easy to loosen and shift in the rolling process. After rolling, an operator detects the head and the side edge of the rolled piece by a wood burning plate method, and stops the machine for adjustment in time when deviation is found. However, the production efficiency is greatly affected by the shutdown adjustment, and steel stacking and pulling can occur if the adjustment is not timely performed.
In addition, there is also a method for controlling line difference by adjusting pre-cut split holes, such as a method for controlling strip uniformity of split pass of deformed steel bar disclosed in patent CN202011188296.6, which adopts a technical scheme of increasing radius of a middle hole, and a method for processing a center line of a multi-line split rolling in a controlled rolling process of bar production disclosed in patent CN201910562637.2, which adopts a technical scheme of increasing height of the middle hole.
The pass adjustment needs to replace the roller, and can only be carried out during non-production, while the billet raw material is frequently changed during actual production, and the fixed pass has insufficient adaptability to the change of the raw material and limited effect on solving the line difference.
Disclosure of Invention
Aiming at the problems, the invention provides a device and a method for producing hot-rolled deformed steel bar, and the specific scheme is as follows:
the invention relates to a production device of hot-rolled deformed steel bar, which comprises pre-cutting pre-rolling, pre-cutting rolling and cutting rolling, wherein the pre-cutting rolling is provided with a first inlet guide, the cutting rolling is provided with a second inlet guide, the structures of the first inlet guide and the second inlet guide respectively comprise a guide base, the rear end of the guide base is hinged through a vertical shaft, the front end of the guide base is provided with a transverse adjusting mechanism, the transverse adjusting mechanism comprises transverse top heads arranged on two sides of the guide base, the tail part of the transverse top head is connected with a front hydraulic cylinder, an oil circuit of the front hydraulic cylinder is connected with a rear hydraulic cylinder, a piston column of the rear hydraulic cylinder is driven by a lead screw, the lead screw is driven by a servo motor, and the sectional area of the front hydraulic cylinder is larger than that of the rear hydraulic cylinder; the servo motor is connected with a first line difference detection mechanism; the transverse adjusting mechanisms of the first inlet guide and the second inlet guide are synchronously controlled.
Furthermore, first poor detection mechanism of line is including locating the first pressure sensor that segmentation rolled in advance, the roll body that segmentation rolled in advance is equipped with a plurality of mounting holes, and the quantity of mounting hole corresponds with the line number that the segmentation rolled, and the tank bottom of wire casing is run through to the one end of mounting hole, is equipped with the ceramic post in the mounting hole, and the head of ceramic post is located the open end of mounting hole, and the afterbody of ceramic post is located to first pressure sensor.
In a first improvement scheme, the servo motor is further connected with a second line difference detection mechanism; the split rolling device is characterized in that a loop device is arranged after the split rolling, the loop device comprises a plurality of loop roller units corresponding to the number of lines, the loop roller units are connected with supporting rods, the other ends of the supporting rods are hinged, auxiliary supporting rods are hinged to the middle of the supporting rods, the other ends of the auxiliary supporting rods are hinged, the auxiliary supporting rods are elastic telescopic rods, the second line difference detection mechanism comprises a second pressure sensor, and the second pressure sensor is arranged on the auxiliary supporting rods.
In the second improvement scheme, an elliptical convex section is arranged in the middle of the pre-splitting pre-rolled section hole, and the width of the elliptical convex section is not less than that of the pre-splitting rolling middle section hole; an adjusting roller is arranged between the pre-splitting pre-rolling and the pre-splitting pre-rolling, a roller gap adjusting mechanism is arranged on the adjusting roller, and the roller gap adjusting mechanism is connected with the first line difference detection mechanism.
The invention relates to a production method of deformed steel bar, which uses a first improved production device of hot-rolled deformed steel bar, and the control method of a transverse adjusting mechanism comprises a step A, when a pressure value detected by a first pressure sensor of a wire casing at two sides has a difference value, the transverse adjusting mechanism pushes a first inlet guide and a second inlet guide to one side with smaller pressure value.
Further, the control method of the transverse adjusting mechanism comprises a step B, when the pressure values detected by the second pressure sensors corresponding to the slots at the two sides are different, the transverse adjusting mechanism pushes the first inlet guide and the second inlet guide to the side with the larger pressure value, and the adjusting amplitude is smaller than that in the step A.
The other production method of the deformed steel bar is a second improved production device of the hot-rolled deformed steel bar, and the control method of the roll gap adjusting mechanism comprises a step C of adjusting the roll gap to be small when the pressure values detected by the first pressure sensors of the middle wire groove and the side wire grooves are different, the roll gap is adjusted to be large when the difference value is positive, and the difference value is negative.
And furthermore, the control method of the roll gap adjusting mechanism comprises a step D, when the pressure values detected by the second pressure sensors corresponding to the middle wire groove and the side wire groove have difference values, if the difference values are positive, the roll gap is adjusted to be small, if the difference values are negative, the roll gap is adjusted to be large, and the adjusting amplitude is smaller than that in the step C.
The line difference during slitting rolling includes line differences on both sides and line differences between the middle line and both sides. The production principle of the centerline line difference is that during precutting, the cutting wedge is pressed downwards, and because the resistance of the steel material to flow to the centerline is obviously greater than that of the side line, the material entering the centerline is less than that of the side line, and the centerline line difference is produced. The prior art solutions to increase the intermediate hole radius or height are directed to this problem.
The scheme is different from the prior art, the hole pattern before precutting is improved, the middle part is provided with a bulge, and the middle part is distributed with a larger section in advance. In addition, by arranging the adjusting roller, the roller gap of the adjusting roller can be adjusted according to the actual line difference state of the central line in the rolling process, the amount of the material protruding in the middle can be adjusted, the amount of the material in the middle is reduced when the roller gap is small, and the amount of the material in the middle is increased when the roller gap is large.
In addition, aiming at the line difference of the two sides, the inlet guide of the pre-splitting rolling and the splitting rolling is designed into a structure capable of being adjusted on line in the scheme, and the guide device can be dynamically corrected according to the detected line difference signal.
In the scheme, the line difference is detected by a first pressure sensor arranged on the roller and a second pressure sensor arranged on the loop, wherein the information collected by the first pressure sensor is used as a main reference, and the information collected by the second pressure sensor is used as a correction reference.
In the prior art, the wood burning plate method is used for detecting the distribution condition of the material amount during precutting, the efficiency is low, the precision is not high, a scheme for detecting the height difference of the loop by adopting a laser ranging method is provided, but the influence of a high-temperature environment on laser ranging is larger. This scheme is through setting up pressure sensor in reasonable position, can in time detect the signal value of being correlated with the line difference, as the foundation of adjustment.
In this scheme, the adjustment of leading and guarding device adopts servo motor driven hydraulic cylinder group to adopt the big cross-section pneumatic cylinder of small cross-section pneumatic cylinder drive, control accuracy is high, and is reliable and stable.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the installation of the guide and guard device of the present invention;
FIG. 3 is a schematic structural view of the looper of the present invention;
FIG. 4 is a schematic structural view of a pre-slit rolling roll according to the present invention;
FIG. 5 is a schematic diagram of the pass of the rolling prior to slitting in the present invention.
Detailed Description
The following describes the embodiments of the present invention in detail with reference to specific examples.
Example 1
The device for producing the hot-rolled deformed steel bar shown in fig. 1-5 comprises pre-slitting pre-rolling 1, pre-slitting rolling 2 and slitting rolling 3, wherein the pre-slitting rolling is provided with a first inlet guide 4, the slitting rolling is provided with a second inlet guide 5, the structures of the first inlet guide and the second inlet guide comprise a guide base 5, the rear end of the guide base 5 is hinged through a vertical shaft 6, and the front end of the guide base is provided with a transverse adjusting mechanism. The guide device 7 is fixed on the guide base, the guide base is arranged on the cross beam 8, and the width of the cross beam is increased according to the scheme. The cross beam 8 is provided with a transverse sliding seat 9 for adjusting the horizontal position of the guide along the cross beam during installation. The guide base 5 is rotatably connected with the slide seat 9 through a vertical shaft.
The transverse adjusting mechanism comprises transverse jacks arranged on two sides of the guide base, the tail parts of the transverse jacks are connected with a front hydraulic cylinder 10, the oil path of the front hydraulic cylinder is connected with a rear hydraulic cylinder 11, a piston column of the rear hydraulic cylinder is driven by a lead screw 12, the lead screw is driven by a servo motor 13, and the cross-sectional area of the front hydraulic cylinder is larger than that of the rear hydraulic cylinder; the servo motor is connected with a first line difference detection mechanism; the transverse adjusting mechanisms of the first inlet guide and the second inlet guide are synchronously controlled. The transverse jacking head and the front hydraulic cylinder are also fixed on the sliding seat, the front hydraulic cylinder is generally transversely arranged, and the axis of the front hydraulic cylinder is inclined at a small angle relative to the cross beam. When the front hydraulic cylinder stretches, the guide base is pushed to rotate along the rotating shaft, and the adjustment range is small, so that the guide head is adjusted transversely.
The stroke of the servo motor is converted according to the rear hydraulic cylinder and the front hydraulic cylinder, so that the control precision can be improved. If the cross-sectional area ratio is 1: and 4, when the stroke of the servo motor is 8mm, the adjustment amplitude is 2mm, the jacks at the two sides of the guide and guard base synchronously move in the same direction during adjustment, and if the left jack pushes forwards, the right jack retreats to keep clamping the guide and guard base. And the servo motors of the first inlet guide and the second inlet guide are synchronously controlled during adjustment.
First poor detection mechanism of line is including locating the first pressure sensor 14 that cuts the roll in advance, and the roll body that cuts the roll in advance is equipped with a plurality of mounting holes 15, and the quantity of mounting hole corresponds with the line number that cuts the roll, and the tank bottom of wire casing is run through to the one end of mounting hole, is equipped with ceramic post 16 in the mounting hole, and the head of ceramic post is located the open end of mounting hole, and the afterbody of ceramic post is located to first pressure sensor 14. The ceramic column and the wall of the mounting hole are elastically connected through a return spring, and the head of the ceramic column is flush with the opening of the mounting hole or slightly higher than the opening. When the material flow distributed by the wire groove is small, the extrusion force on the ceramic column is small, the signal value sensed by the pressure sensor is correspondingly small, otherwise, the signal value is large, and therefore the line difference state is detected.
Example 2
As shown in fig. 3, in addition to embodiment 1, the servo motor is further connected with a second line difference detection mechanism; the split rolling device is characterized in that a loop device is arranged after the split rolling, the loop device comprises a plurality of loop roller units 17 corresponding to the number of lines, the loop roller units are arranged in parallel, the loop roller units are connected with supporting rods 18, the other ends of the supporting rods are hinged, auxiliary supporting rods 19 are hinged to the middle portions of the supporting rods, the other ends of the auxiliary supporting rods are hinged, the auxiliary supporting rods are elastic telescopic rods, a second line difference detection mechanism comprises a second pressure sensor 20, and the second pressure sensor 20 is arranged on the auxiliary supporting rods. When the height of the loop is larger, the thrust to the supporting rod is larger, and the pressure on the auxiliary supporting rod is correspondingly reduced. Therefore, the height of the loop can be reflected by detecting the pressure change of the auxiliary supporting rod, and the loop height of each line is compared with the difference of the reaction lines.
In the process of preparing the deformed steel bar by using the device of the embodiment, the control method of the transverse adjusting mechanism comprises a step A, when a difference value exists between pressure values detected by the first pressure sensors of the slots at the two sides, the transverse adjusting mechanism pushes the first inlet guide and the second inlet guide to one side with a smaller pressure value.
And B, when the pressure values detected by the second pressure sensors corresponding to the wire grooves on the two sides have a difference, the transverse adjusting mechanism pushes the first inlet guide and the second inlet guide to the side with the larger pressure value, and the adjusting amplitude is smaller than that in the step A. The adjustment in the step B is a further correction to the adjustment in the step A, and the amplitude can be selected from 1/3-1/5 of the amplitude adjusted in the step A.
Example 3
As shown in fig. 5, on the basis of embodiment 1, an elliptical convex section 21 is arranged in the middle of the pre-splitting pre-rolled hole, the width of the elliptical convex section is not less than the width of the pre-splitting rolled middle hole, and is preferably slightly greater than the width of the middle hole, for example, when three lines are cut, the width of the pre-splitting middle hole is 13.4mm, the width of the elliptical convex section is 15mm, and the height is 2 mm; an adjusting roller 22 is arranged between the pre-splitting pre-rolling and the pre-splitting pre-rolling, a roller gap adjusting mechanism is arranged on the adjusting roller, and the roller gap adjusting mechanism is connected with the first line difference detection mechanism. The roll gap adjusting mechanism is used for adjusting roll gaps, specifically, a roll shaft of a roller below is arranged in a vertical sliding groove, a lead screw is arranged on the roll shaft, and the lead screw rotates to drive the roller to adjust, so that the roll gaps are adjusted.
In the process of preparing the deformed steel bar by using the device of the embodiment, the control method of the roll gap adjusting mechanism comprises a step C, when the pressure values detected by the first pressure sensors of the middle wire casing and the side wire casing have a difference value, if the difference value is positive, the roll gap is adjusted to be large, and if the difference value is negative, the roll gap is adjusted to be small. When the roll gap is large, the pressing amount of the oval bulge is small, and the amount of the material left in the central line during precutting is increased; otherwise, the amount of material left in the middle line during precutting is reduced.
And D, when the pressure values detected by the second pressure sensors corresponding to the middle wire groove and the side wire groove have difference values, if the difference values are positive, the roll gap is adjusted to be small, if the difference values are negative, the roll gap is adjusted to be large, and the adjustment amplitude is smaller than that in the step C. Similarly, the adjustment in step D is a further modification to the adjustment in step A, and the adjustment range in step C can be selected from 1/3-1/5.
Claims (8)
1. The utility model provides a production device of hot rolling screw-thread steel, rolls before pre-segmentation, pre-segmentation divides to roll and segmentation rolls, and pre-segmentation divides to roll to be equipped with first entry guide, and the segmentation rolls to be equipped with second entry guide, its characterized in that: the first inlet guide and the second inlet guide both comprise guide bases, the rear ends of the guide bases are hinged through vertical shafts, the front ends of the guide bases are provided with transverse adjusting mechanisms, each transverse adjusting mechanism comprises transverse jacks arranged on two sides of the guide base, the tail parts of the transverse jacks are connected with front hydraulic cylinders, oil passages of the front hydraulic cylinders are connected with rear hydraulic cylinders, piston columns of the rear hydraulic cylinders are driven by lead screws, the lead screws are driven by servo motors, and the cross-sectional areas of the front hydraulic cylinders are larger than the cross-sectional areas of the rear hydraulic cylinders; the servo motor is connected with a first line difference detection mechanism; the transverse adjusting mechanisms of the first inlet guide and the second inlet guide are synchronously controlled.
2. A production apparatus for hot-rolled threaded steel according to claim 1, characterized in that: the first linear difference detection mechanism comprises a first pressure sensor arranged on a pre-splitting roller, a plurality of mounting holes are formed in the pre-splitting roller, the number of the mounting holes corresponds to the number of the pre-splitting roller, one end of each mounting hole penetrates through the bottom of the slot, a ceramic column is arranged in each mounting hole, the head of each ceramic column is located at the opening end of each mounting hole, and the tail of each ceramic column is arranged on the first pressure sensor.
3. A production apparatus for hot-rolled threaded steel according to claim 2, characterized in that: the servo motor is also connected with a second line difference detection mechanism; the split rolling device is characterized in that a loop device is arranged after the split rolling, the loop device comprises a plurality of loop roller units corresponding to the number of lines, the loop roller units are connected with supporting rods, the other ends of the supporting rods are hinged, auxiliary supporting rods are hinged to the middle of the supporting rods, the other ends of the auxiliary supporting rods are hinged, the auxiliary supporting rods are elastic telescopic rods, the second line difference detection mechanism comprises a second pressure sensor, and the second pressure sensor is arranged on the auxiliary supporting rods.
4. A production apparatus for hot-rolled threaded steel according to claim 1, characterized in that: an elliptical convex section is arranged in the middle of the pre-splitting pre-rolling profile hole, and the width of the elliptical convex section is not less than that of the pre-splitting rolling middle profile hole; an adjusting roller is arranged between the pre-splitting pre-rolling and the pre-splitting pre-rolling, a roller gap adjusting mechanism is arranged on the adjusting roller, and the roller gap adjusting mechanism is connected with the first line difference detection mechanism.
5. A production method of deformed steel bar is characterized in that: the production apparatus of hot-rolled deformed steel bar according to claim 3, wherein the control method of the lateral adjustment mechanism comprises a step A of pushing the first inlet guide and the second inlet guide to the side with smaller pressure value when there is a difference in pressure value detected by the first pressure sensors of the slots on both sides.
6. A method of producing a deformed steel bar according to claim 5, wherein: and B, when the pressure values detected by the second pressure sensors corresponding to the wire grooves on the two sides have a difference, the transverse adjusting mechanism pushes the first inlet guide and the second inlet guide to the side with the larger pressure value, and the adjusting amplitude is smaller than that in the step A.
7. A production method of deformed steel bar is characterized in that: the production apparatus for hot-rolled threaded steel according to claim 4 is used, and the control method of the roll gap adjusting mechanism includes a step C of adjusting the roll gap to be large when the difference between the pressure values detected by the first pressure sensors of the middle wire casing and the side wire casing is positive and decreasing when the difference is negative.
8. A method of producing a deformed steel bar according to claim 7, wherein: and D, when the pressure values detected by the second pressure sensors corresponding to the middle wire groove and the side wire groove have difference values, if the difference values are positive, the roll gap is adjusted to be small, if the difference values are negative, the roll gap is adjusted to be large, and the adjustment amplitude is smaller than that in the step C.
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| CN202111281584.0A CN113976636B (en) | 2021-11-01 | 2021-11-01 | Production device and method for hot-rolled deformed steel bar |
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| CN202111281584.0A CN113976636B (en) | 2021-11-01 | 2021-11-01 | Production device and method for hot-rolled deformed steel bar |
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