JP3748256B2 - Rolling method and rolling system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rolling method using a universal rolling mill and a rolling system including the universal rolling mill.
[0002]
[Prior art]
The universal rolling mill includes a pair of horizontal rolls arranged above and below the conveyance path for the rolled material, and a pair of scissors rolls arranged apart from the left and right of these horizontal rolls. The pair of horizontal rolls are rotationally driven by a driving means so as to bite and carry the rolled material that has been carried in. The roll is not driven and is stationary before the rolling material is carried in, and rotates along with the rolling material in the process of being conveyed while being rolled by the horizontal roll.
[0003]
In the universal rolling mill having the above configuration, when the tip of the rolled material comes into contact (collision) with the dredging roll, the dredging roll and the rolled material are slippery because the dredging roll is stationary, and the tip of the rolled material is partially The phenomenon of peeling off and adhering to the roll, and this adhering material being repeatedly engraved on the rolled material that subsequently passes, that is, so-called seizure, was likely to occur.
[0004]
Japanese Patent Application Laid-Open No. 7-314020 discloses a universal rolling mill that rotationally drives not only a horizontal roll but also a vertical roll. In this rolling mill, the above seizure can be eliminated.
[0005]
[Patent Document 1]
Japanese Patent Laid-Open No. 7-314020 (FIG. 4)
[0006]
[Problems to be solved by the invention]
However, the universal rolling mill disclosed in the above publication has a drawback in that a mechanism for rotationally driving the rolls has to be incorporated in the rolling mill, resulting in a complicated structure and high equipment costs.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the method of the present invention comprises a pair of horizontal rolls arranged above and below a conveying path of rolled material, a driving means for rotationally driving these horizontal rolls, and a pair arranged on the left and right sides of these horizontal rolls. In a rolling method using a universal rolling mill equipped with a rolling mill, a rolling roll is brought into contact with a horizontally driven horizontal roll and rotated before the rolled material is carried into the universal rolling mill. The roll is retracted from the horizontal roll to a predetermined rolling position immediately before the roll is carried in, and the tip of the rolled material is received by the horizontal roll that is rotationally driven and the roll that is rotated by inertia, and rolling is performed. After the rolled material is unloaded from the universal rolling mill, the roll roll is returned to the position in contact with the horizontal roll and rotated to prepare for the next rolled material. It is characterized in.
According to the above method, even if there is no means for driving the rolls in the universal rolling mill, the rolls are rotating when the rolled material is caught, so that repeated rolling is performed while preventing seizure from occurring. be able to.
[0008]
The rolling system of the present invention is
(A) Universal rolling provided with a pair of horizontal rolls arranged above and below the conveying path of the rolled material, a driving means for rotationally driving these horizontal rolls, and a pair of eaves rolls arranged on the left and right sides of these horizontal rolls Machine,
(B) moving means for moving the heel roll between a contact position in contact with the horizontal roll and a rolling position separated from the horizontal roll by a predetermined distance;
(C) carrying-in detection means for detecting the rolled material carried into the universal rolling mill;
(D) Unloading detection means for detecting unloading of the rolled material from the universal rolling mill;
(E) The rolling means is moved from the contact position to the rolling position by driving the moving means in response to the rolling material carry-in signal from the carry-in detecting means, and the rolled material is carried out from the carry-out detecting means. The moving means is driven in response to a signal, and control means is provided for moving the scissors roll from the rolling position to the contact position.
According to this configuration, the roll is rotated using the rotation of the horizontal roll prior to the biting of the rolled material, so that the seizure can be prevented from occurring and the means for rotationally driving the roll is omitted. Therefore, the universal rolling mill is not complicated and an increase in equipment cost can be avoided.
[0009]
Preferably, the carry-in detection means includes an inlet sensor that is disposed at a predetermined distance in front of the universal rolling mill and detects a rolled material, and the carry-out detection means includes the inlet sensor and the inlet sensor that detects the rolled material. And elapsed time detecting means for detecting that a predetermined time has passed since the detection was stopped.
Thereby, since an inlet sensor can be used for both carrying in and carrying out detection, the structure of a control system can be simplified.
[0010]
Preferably, the moving means includes a moving frame that is supported by the base frame so as to be horizontally slidable, and a hydraulic cylinder that is disposed between the base frame and the moving frame and moves the moving frame. A roll is rotatably supported.
In this way, the moving means can be simply configured by the hydraulic cylinder and the moving frame. Moreover, the saddle roll can be brought into contact with the horizontal roll with a high contact pressure by the hydraulic cylinder, and the rotation can be reliably imparted to the saddle roll. Further, the saddle roll can be quickly retracted from the contact position to the rolling position by the hydraulic cylinder.
[0011]
Preferably, the corner portion at the boundary between the both end faces and the peripheral surface of the horizontal roll is chamfered. According to this, it is possible to prevent the corner portion of the horizontal roll from being broken by an impact when the saddle roll hits the horizontal roll.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a rolling system according to an embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the rolling system includes a universal rolling mill 10. The rolling mill 10 includes a pair of horizontal rolls 11 and 12 disposed above and below the conveyance path A, and a pair of trough rolls 13 and 14 disposed on the left and right sides of the horizontal rolls 11 and 12. The pair of upper and lower horizontal rolls 11 and 12 are rotationally driven by driving means 15 and 16 about the horizontal rotation shafts 11x and 12x. In addition, the rotation directions of the upper and lower horizontal rolls 11 and 12 are reversed, and the rolled material is bitten and conveyed as will be described later. The axial dimensions of the scissors rolls 13 and 14 are limited so that the scissors rolls 13 and 14 face only the lower part of the horizontal roll 11 and the upper part of the horizontal roll 12.
[0013]
As shown in FIG. 4, the corner portions 11a and 12a at the boundary between the both end faces and the peripheral surface of the horizontal rolls 11 and 12 are chamfered. That is, it has a shape in which a portion (indicated by an imaginary line) where originally flat end surfaces and a circumferential surface forming a cylindrical surface intersect at 90 ° is cut off.
[0014]
The pair of left and right scissors rolls 13 and 14 are supported by the support structure 20 shown in FIG. 3 so as to be freely rotatable about the vertical rotation shafts 13x and 14x, respectively. The support structure 20 includes a fixed frame (fixed system) (not shown) fixed to the base of the rolling mill 10 and a basic U-shape that is supported by the fixed frame so as to be slidable in the directions of the horizontal rotation axes 11x and 12x. A frame 21, a rolling position adjusting means 30 for adjusting the position of the foundation frame 21 in the same direction, a moving means 40 incorporated in the foundation frame 21, and a stopper 25 serving as a stop when the moving means 40 is contracted. I have.
[0015]
The moving means 40 includes a moving frame 41 slidably supported on the base frame 21 and a hydraulic cylinder 42 extending in parallel to the horizontal rotation shafts 11x and 12x. The moving frame 41 has a U-shaped slide member 41a that is slidably supported by the base frame 21, and upper and lower surfaces of the front end portion (the end portion closer to the horizontal rolls 11 and 12) of the slide member 41a. The support plate 41b is fixed, and the upper and lower support plates 41b support the shafts serving as the vertical rotation shafts 13x and 14x of the heel rolls 13 and 14, respectively.
[0016]
In the hydraulic cylinder 42, the cylinder portion 42 a is connected to the front surface (the surface closer to the horizontal rolls 11 and 12) of the base frame 21, and the tip of the rod portion 42 b is the rear surface (the horizontal roll 11) of the slide member 41 a of the moving frame 41. , 12 and the surface farther from 12). When the hydraulic cylinder 42 extends, the moving frame 41 moves toward the horizontal rolls 11 and 12 so that the scissors rolls 13 and 14 are brought into contact with the horizontal rolls 11 and 12 in a state where pressure is applied. Further, the base frame 20 is provided with a stopper 25. When the hydraulic cylinder 42 is contracted, the moving frame 41 is retracted and hits the stopper 25, whereby the scissors rolls 13 and 14 are separated from the horizontal rolls 11 and 12. It stops at the rolling position. When the saddle rolls 13 and 14 are moved to the contact position, the impact is reduced by decelerating the flow rate adjusting valve provided in the hydraulic oil supply circuit to the hydraulic cylinder 42.
[0017]
Next, the rolling position adjusting means 30 will be described. The rolling position adjusting means 30 includes a screw screw 31 fixed to the rear surface of the base frame 21 and extending in parallel to the horizontal rotation shafts 11x and 12x, a gear mechanism 32 meshing with the screw screw 31, and a motor 33 installed on the fixed frame. And a brake 34 for suddenly stopping the motor 33, and a pulse generator 35 for detecting the rotation of the motor 33. The gear mechanism 32 has a reduction gear portion and a nut that meshes with the screw screw 31. The rotation of the motor 33 is transmitted to the nut through the reduction gear portion, and thereby the screw screw 31 moves in the axial direction.
[0018]
As shown in FIG. 1, the rolling system is further equipped with an inlet sensor 50 and a controller 60. The entrance sensor 50 detects the rolled material 100 in a non-contact manner and outputs an ON signal, and is composed of, for example, an optical sensor. The entrance sensor 50 is arranged at a predetermined distance D from the entrance of the rolling mill 10.
[0019]
The operation of the rolling system will be described. The action of the rolling position adjusting means 30 and the base frame 21 is to set or adjust the rolls 13 and 14 to the rolling position defined by the rolling size. As will be described later, in accordance with the width dimension of the rolled material 100, the rolling position adjusting means 30 causes the hydraulic cylinder 42 to contract so that the movable frame 41 is in contact with the stopper 25 of the base frame 21. Set or adjust the rolling position. That is, the hydraulic cylinder 42 is contracted in advance so that the moving frame 41 is in contact with the stopper 25 of the basic frame 21, and the motor 33 is driven to bring the horizontal roll into contact with the horizontal roll. The above-mentioned rolling position (or a numerical value corresponding to this rolling position, for example, a numerical value representing the distance to the horizontal rolls of the rolls 13 and 14, the position of the base frame 21, etc.) is set and inputted from an operation / setting unit (not shown). The motor 33 is driven by receiving a pulse from the pulse generator 35 in response to a command from the controller 60 described later, and the rotation speed of the motor 33 corresponds to the rolling position while monitoring the set rolling position of the rolls 13 and 14. When the numerical value to be reached is reached, the motor 33 is stopped and the brake 34 is applied. Thereby, the rolling position of the rolls 13 and 14 is set. Fine adjustment is performed by moving the motor 33 through the controller 60 from the operation unit.
[0020]
The rolled material 100 is carried into the universal rolling mill 10 in a finishing process. For example, as shown in FIG. 2B, the rolled material 100 has a base portion 101 having a flat plate shape and flange portions 102 formed on the left and right edges of the base portion 101 and has an H-shaped cross section. .
[0021]
The actions of the moving frame 41, the hydraulic cylinder 42, the inlet sensor 50, etc. are to move the scissors rolls 13 and 14 to a position where they contact the horizontal rolls 11 and 12 or return them to the rolling position at an appropriate time. Prior to the rolling of the rolled material 100, the controller 60 drives the driving means 15 and 16 to rotate the horizontal rolls 11 and 12, and the hydraulic cylinder 42 is extended to move the rolls 13 and 14 to the horizontal rolls 11 and 12. Move to the position where it touches. Thereby, the reed rolls 13 and 14 are rotated by the rotation transmitted from the horizontal rolls 11 and 12. In this state, it waits for carrying in of the rolling material 100.
[0022]
When the rolled material 100 advances toward the universal rolling mill 10, the leading end is detected by the inlet sensor 50. In response to this ON signal (carrying-in detection signal), the controller 60 immediately contracts the hydraulic cylinder 42 and retracts the scissors rolls 13 and 14 to the rolling position. Thereby, the scissors rolls 13 and 14 are separated from the horizontal rolls 11 and 12, but the rotation is maintained by inertia. In this state, the rolled material 100 enters the universal rolling mill 10.
[0023]
When the leading end of the rolled material 100 loaded comes into contact with the peripheral surfaces of the horizontal rolls 11 and 12 and the scissors rolls 13 and 14, some of the material is peeled off and seizure is likely to occur. However, since the horizontal rolls 11 and 12 are rotationally driven, the slip is small and seizure is prevented. Also, since the rolls 13 and 14 are rotated by inertia, the slip is small and seizure is prevented.
[0024]
The rolled material 100 is rolled by the horizontal rolls 11 and 12 and the vertical rolls 13 and 14 while being conveyed by the horizontal rolls 11 and 12 that are rotationally driven. The vertical rolls 13 and 14 follow the conveyance of the rolled material 100 and rotate.
[0025]
When the end of the rolled material 100 passes through the inlet sensor 50, the inlet sensor 50 is turned off, and the controller 60 extends the hydraulic cylinder 42 after the set time has elapsed after receiving the off signal, so that the rolls 13 and 14 are moved. The both ends of the horizontal rolls 11 and 12 are brought into contact with each other. This set time is a time sufficient for the end of the rolled material 100 to pass through the universal rolling mill 10 or more. By the movement of the heel rolls 13 and 14 to the contact position, the heel rolls 13 and 14 are rotated again by the horizontal rolls 11 and 12 and are ready for the next rolled material.
[0026]
Next, the details of the control routine in the controller 60 will be described with reference to FIG. This control routine is started in response to the ON operation of the operation switch. First, in a state where the hydraulic cylinder 42 is contracted and the moving frame 41 is in contact with the stopper 25 of the base frame 21, the motor 33 is driven to advance the base frame 21, whereby the scissors rolls 13, 14 are moved to the horizontal roll 11. , 12 (step S1). Next, the base frame 21 is moved backward by rotating the motor 33 in reverse, so that the rolls 13 and 14 are set to the set rolling position (step S2). Next, the hydraulic cylinder 42 is extended to bring the saddle rolls 13 and 14 into contact with the horizontal rolls 11 and 12 (step S3). Next, the process waits until the inlet sensor 50 is turned on (step S4). When the inlet sensor 50 is turned on, the hydraulic cylinder 42 is contracted to retract the scissors rolls 13 and 14 to the rolling position (step S5). Next, it waits until the entrance sensor 50 is turned off (step S6). When the inlet sensor 50 is turned off, a timer is started (step S7), and thereafter, it waits until the elapsed time of the timer means reaches a set time (step S8). When the elapsed time reaches the set time, the hydraulic cylinder 42 is extended and the reed rolls 13 and 14 are again brought into contact with the horizontal rolls 11 and 12 (step S9), and the reed rolls 13 and 14 are rotated. Next, it is determined whether or not there is a rolling end command, that is, whether or not the operation switch is turned off (step S30). If the determination is negative, the process proceeds to step S4 and waits for the next rolled material. In the case of an affirmative determination, the hydraulic cylinder 42 is contracted to retract the saddle rolls 13 and 14 to the rolling position (step S31), and this control routine is ended.
[0027]
In the control routine, rolling is performed in a period from after step S5 to before affirmative determination is made in step S8. The inlet sensor 50 serves as a carry-in detection means for the rolled material 100, and the inlet sensor 50, the timer, and steps S7 and S8 serve as a carry-out detection means for the rolled material.
[0028]
The present invention is not limited to the above embodiment, and various forms can be adopted. For example, in the above embodiment, the unloading of the rolled material is detected by an inlet sensor and a timer, but an outlet sensor is provided as a unloading detecting means on the outlet side of the universal rolling mill, and this outlet sensor detects the end of the rolled material. It may be.
You may drive the motor 33 and the hydraulic cylinder 42 using another controller.
A plurality of position adjusting means for moving the base frame and a plurality of hydraulic cylinders for moving the moving frame may be provided.
The size to be rolled is not limited to the H-section steel, but can be applied to all of the shape steels that can be rolled by a universal rolling mill such as a groove-shaped steel and a flat steel.
[0029]
【The invention's effect】
As described above, according to the present invention, even if the universal rolling mill is not equipped with a driving means for the rolls and has a simple structure, seizure can be surely prevented.
[Brief description of the drawings]
FIG. 1 is a side view of a rolling system including a universal rolling mill according to an embodiment of the present invention.
FIG. 2 is a front view of the rolling mill as viewed from the carry-in side, in which (A) shows a state before carrying the rolled material, and (B) shows a state during rolling.
FIG. 3 is a plan view showing means for moving the roll of the rolling mill and means for adjusting the rolling position of the roll, wherein (A) shows a state before the rolling material is carried in, and (B) shows that rolling is in progress. Each state is shown.
FIG. 4 is an enlarged view showing the shape of a horizontal roll in the vicinity of the roll of the rolling mill.
FIG. 5 is a flowchart showing a saddle roll movement control routine executed by a controller of the rolling system.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Universal rolling mill 11,12 Horizontal roll 13,14 Roller roll 15,16 Driving means 21 Base frame 30 Rolling position adjustment means 40 Moving means 41 Moving frame 42 Hydraulic cylinder 50 Inlet sensor 60 Controller (control means)

Claims (5)

A universal rolling mill having a pair of horizontal rolls arranged above and below the conveying path of the rolled material, a driving means for rotationally driving these horizontal rolls, and a pair of vertical rolls arranged on the left and right of these horizontal rolls is used. In the rolling method
Prior to the rolling material being carried into the universal rolling mill, the roll is brought into contact with the horizontal roll that is being driven to rotate, and the rolling roll is moved from the horizontal roll to a predetermined rolling position immediately before the rolling material is carried in. The rolling material is retracted, and the leading end of the rolled material is received by a horizontal roll that is rotationally driven and a reed roll that is rotated by inertia, the rolling is performed, and the reed roll is transported from the universal rolling mill. A rolling method characterized by preparing for the next rolled material by returning and rotating to a position in contact with the horizontal roll. (A) Universal rolling provided with a pair of horizontal rolls arranged above and below the conveying path of the rolled material, a driving means for rotationally driving these horizontal rolls, and a pair of eaves rolls arranged on the left and right sides of these horizontal rolls Machine,
(B) moving means for moving the heel roll between a contact position in contact with the horizontal roll and a rolling position separated from the horizontal roll by a predetermined distance;
(C) carrying-in detection means for detecting the rolled material carried into the universal rolling mill;
(D) Unloading detection means for detecting unloading of the rolled material from the universal rolling mill;
(E) The rolling means is moved from the contact position to the rolling position by driving the moving means in response to the rolling material carry-in signal from the carry-in detecting means, and the rolled material is carried out from the carry-out detecting means. A rolling system comprising: control means for moving the culvert roll from the rolling position to the contact position by driving the moving means in response to a signal. The carry-in detection means includes an inlet sensor that is disposed at a predetermined distance in front of the universal rolling mill and detects a rolled material, and the carry-out detection means stops detecting the rolled material by the inlet sensor and the inlet sensor. The rolling system according to claim 2, further comprising: elapsed time detecting means for detecting that a predetermined time has elapsed since then. The moving means includes a moving frame that is supported by the base frame so as to be horizontally slidable, and a hydraulic cylinder that is disposed between the base frame and the moving frame and moves the moving frame. The rolling system according to claim 2 or 3, wherein the rolling system is supported. The rolling system according to any one of claims 2 to 4, wherein a corner portion at a boundary between the both end faces and the peripheral surface of the horizontal roll is chamfered.

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