JPH0771687B2 - Rolling guide method for roller guides - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller guide capable of guiding and guiding a rolled material to a rolling mill with an optimal binding force of a guide roller.
The present invention relates to a method for inducing rolled material .

[0002]

2. Description of the Related Art In order to guide a rolled material accurately, it is desirable that a guide roller binds the rolled material from the front end to the rear end with a constant binding force. However, as is well known, the dimension from the leading end to the trailing end of the rolled material is not constant, and generally the leading end and the trailing end are thicker than the size of the intermediate portion. If you adjust it according to the size of the middle part of the roll, the thickened portion such as the tip of the rolled material is difficult to bite into the guide roller, so it may cause a bump or the tip of the rolled material may collide with the guide roller and cause flaws. There is a problem such as attaching. On the other hand, if the guide roller spacing is set wider than the size of the intermediate part so that the tip of the rolled material, such as the leading edge, can easily pass between the guide rollers, it can be compared to the leading and trailing edges of the rolled material. Since the rolling material wrapping force of the guide roller is insufficient in the narrow and thin middle part, it is difficult to guide the rolled material accurately, and the dimensional accuracy accompanying the occurrence of scratches and dimensional defects of the rolled material decreases. The problem arises.

As a technique for detecting the poor rotation of the guide roller and the shortage of the rolling material wrapping force of the guide roller, a rolling mill guide roller poor rotation detection device disclosed in Japanese Utility Model Laid-Open No. 4-108907 has been proposed. There is. This device is provided with a signal generator during threading for detecting the presence or absence of rolled material in the roller guide and a rotation speed detection sensor for the guide roller,
When the number of rotations of the guide roller decreases while the rolled material is passing through the roller guide by the signal generator during passage and the rotation number detection sensor of the guide roller, an alarm is issued as a rotation failure,
It is intended to prevent scratches and dimensional defects from occurring in the rolled material.

[0004]

In the conventional example, the rolling material is not guided accurately because the bearing is deteriorated or the guide roller is not rotated properly or the rolling material wrapping force of the guide roller is insufficient. Although it can be detected, the gap between the guide rollers is made to follow the dimensional fluctuation of the rolled material, the rolled material is accurately guided, and guided by the optimum binding force. There is no disclosure about the technical means for preventing the occurrence of the above. An object of the present invention is to guide the rolled material to the rolling mill with the optimum binding force of the guide rollers. Another object of the present invention is to prevent the occurrence of scratches on the rolled material and to enable rolling of the rolled material with high dimensional accuracy.

[0005]

[Means for Solving the Problems] From the time when a rolled material is bitten into a guide roller to the trailing edge of the rolled material, the circumferential speed of the rolled material is set using the peripheral speed of the guide roller and the rolling speed of the rolled material as parameters. If the rolling material is kept within a certain range with respect to the speed, the rolled material can be guided to the rolling mill with the optimum binding force of the guide rollers. To keep the peripheral speed of the guide roller within a certain range with respect to the rolling speed of the rolled material, determine the rolling speed of the rolled material from the rotational speed and diameter of the rolling roll, and then calculate the rotational speed and diameter of the guide roller from the rotational speed and diameter of the guide roller. The peripheral speeds may be obtained and compared, and the rolling material wrapping force of the guide roller may be adjusted so that the peripheral speed of the guide roller with respect to the rolling speed is always within a certain range.

From this, according to the rolled material guiding method of the present invention, the rolling speed S of the rolled material is set between the time when the rolled material is caught in the guide roller of the roller guide device and the time when the rolled material slips out.
(M / sec) and the peripheral velocity V (m / sec) of the guide roller that guides the rolled material, the rolling velocity S and the peripheral velocity V of the guide roller are set so that S ≧ V ≧ 0.7S. The rolling material wrapping force of the guide roller is controlled as a parameter, and the rolling material is guided to the rolling roll by the optimum wrapping force of the guide roller. The rolling speed S of the rolled material is obtained from the diameter of the rolling roll and the rotation speed. The peripheral velocity V (m / sec) of the guide roller is obtained from the diameter and the rotation speed of the guide roller.

[0007] As the roller guide device measures a guide roller which is rotatably supported by the roller holder, a fluid pressure cylinder for adjusting the rolled material embracing force of the guide rollers, the rotational speed of the guide roller than using those comprising a measuring device for, and a control device for comparison operation and the rolling speed of the rolled material S (m / sec) and of the guide roller peripheral velocity V (m / sec) as a parameter is there. In the control device, that controls a fluid pressure cylinder such that the relationship between the peripheral velocity V of the rolling speed S and the guide roller of the rolled material is S ≧ V ≧ 0.7 S.

[0008]

When the peripheral speed V of the guide roller is increased, the fluid pressure of the fluid pressure cylinder is increased to strengthen the rolling material wrapping force of the guide roller and increase the rotation speed of the guide roller. When the peripheral velocity V of the guide roller is reduced, the fluid pressure of the fluid pressure cylinder is lowered to weaken the rolling material wrapping force of the guide roller and reduce the rotation speed of the guide roller. When guiding the rolled material, the interval between the guide rollers should be made equal to or slightly larger than the dimension of the rolled material tip and kept on standby.For example, if the rolled material detector detects that the rolled material bites into the guide roller, the fluid Fluid pressure is applied to the pressure cylinder to narrow the gap between the guide rollers from the standby position, and the rolling material is bound by the guide rollers.The fluid pressure is controlled by the controller so that the peripheral speed of the guide rollers with respect to the rolling speed satisfies the above relational expression. Adjust the cylinder fluid pressure. When the rolling material wrapping force is insufficient, the rolling material wrapping force of the guide roller decreases, the rotation speed of the guide roller decreases, and the peripheral speed decreases, so the fluid pressure of the fluid pressure cylinder is increased and the rolling material Guide the rolled material to the rolling rolls by increasing the binding force.

[0009]

【Example】

Drawing of the embodiment of the rolling material guidance method of the roller guide of the present invention
It will be described based on . The peripheral speed V of the guide roller is calculated from the number of revolutions detected from both or one of the guide rollers 4 arranged to face the pair of roller holders 2 shown in FIGS. 1 and 2 and the diameter of the guide roller measured in advance. (M /
Sec) and the rolling speed S (m / sec) of the rolled material W calculated from the number of revolutions of the rolling roll 11 of the rolling mill and the diameter of the rolling roll measured in advance is compared and calculated. The rolling material wrapping force of the guide roller is controlled so that the relationship between the peripheral speed V and the rolling speed S is S ≧ V ≧ 0.7S, and the rolling material is always guided to the rolling roll 11 with the optimum rolling material wrapping force. It is a thing. When the leading end of the rolled material W passes through the guide roller 4 and the intermediate portion of the rolled material having a smaller dimension than the leading end is caught in the guide roller, the contact pressure between the guide roller and the rolled material decreases and the guide When the roller slips or a non-contact state with the rolled material occurs and the rotation speed of the guide roller decreases, and the peripheral speed V of the guide roller 4 with respect to the rolling speed S becomes equal to or less than a predetermined value, the guide roller By increasing the peripheral speed V of the guide roller so that the peripheral speed falls within a predetermined range, that is, within S ≧ V ≧ 0.7S, the rolled material is always bound by the optimum rolling material wrapping force by the guide roller to accurately Guide to the rolling roll 11.

An embodiment of the roller guide device used in the present invention will be described. As shown in FIGS. 1 and 2, the guide box 1 is provided with a pair of roller holders 2 which can be opened and closed by fulcrum pins 3. A guide roller 4 is provided at the front portion (right side in FIG. 1) of the roller holder 2 with the fulcrum pin 3 interposed therebetween, and a rotation sensor 5 which is a measuring device for measuring the number of rotations of the guide roller 4 is provided. A hydraulic cylinder 6 is arranged at the rear part of the roller holder 2 (on the left side in FIG. 1), and the rear end of the roller holder 2 is always brought into contact with the ram 6a of the hydraulic cylinder by utilizing the spring force of the spring 7. I am allowed. In the hydraulic cylinder 6, the interval between the guide rollers 4 can be adjusted by the expansion and contraction operation of the ram 6a, and therefore the rolling material wrapping force is adjusted. In other words, the control of the rolling material binding force of the guide roller 4 is performed by opening and closing the roller holder 2 by the expansion and contraction of the ram 6a of the hydraulic pressure cylinder 6 and adjusting the distance between the guide rollers 4. The hydraulic pressure applied to the hydraulic cylinder 6 is detected by the pressure sensor 9 shown in FIG. Pressure sensor 9
Is a control device 10 for controlling the fluid pressure of the fluid pressure cylinder 6.
Electrically connected to. The control method of the hydraulic cylinder 6 by the control device 10 (FIG. 3) is the rolling speed S of the rolled material W.
And the peripheral velocity V of the guide roller are compared as parameters, and the hydraulic pressure applied to the hydraulic cylinder is adjusted according to the calculation result. Rolling speed S of rolled material W
Is calculated from the diameter of the rolling roll and the rotation speed. The peripheral velocity V of the guide roller is obtained from the number of rotations of the guide roller measured by the rotation sensor 5 and the diameter of the guide roller measured in advance. The control device 10 can control the hydraulic pressure of the hydraulic cylinder 6 so that the relationship between the rolling speed S of the rolled material and the peripheral speed V of the guide roller is S ≧ V ≧ 0.7S. In FIG. 1, reference numeral 8 is a rolled material detector for detecting the approach of rolled material. In FIG. 3, 12 is an electric wire and 13 is a hydraulic pipe.

A method of guiding a rolling mill using the roller guide device of the above example will be described. Before the rolled material W bites into the guide roller 4, the interval between the guide rollers is set to be equal to or slightly wider than the size of the tip of the rolled material, and the timing at which the rolled material bites into the guide roller 4 is set in the previous stage. The roller holder is calculated by using the rolling speed of the rolling mill and the detection signal of the rolling detector 8 and the required hydraulic pressure is applied to the hydraulic cylinder 6 at the moment when the rolled material bites into the guide roller, and the ram 6a is used. The rear part of 2 is pushed open, the rolled material is bound by the required binding force of the guide roller 4 and guided to the rolling roll 11. When the leading end of the rolled material W passes through the guide roller 4 and the intermediate portion having a smaller size than the leading end is caught in the guide roller 4, the contact pressure between the guide roller and the rolled material decreases, and the guide roller 4
If slippage or a non-contact state with the rolled material occurs and the rotation speed of the guide roller decreases, and the peripheral speed V of the guide roller 4 with respect to the rolling speed S of the rolled material W becomes a predetermined value or less, By increasing the hydraulic pressure applied to the hydraulic cylinder 6 and increasing the peripheral speed V of the guide roller 4 so that the peripheral speed of the guide roller 4 falls within a predetermined range, it is possible to always tie the rolled material with an optimum rolling material tying force and accurately. Then, the rolling roll 11 is guided.

In the roller guide device of the above example, the pressure sensor 9 detects the hydraulic pressure applied to the hydraulic cylinder 6, and the control device 10 stores the peripheral speed of the guide roller 4 with respect to the hydraulic pressure. If the bearing function deteriorates and the peripheral speed of the guide roller falls below a certain value compared to the relationship between the hydraulic pressure applied to the hydraulic cylinder and the peripheral speed of the guide roller when the bearing is functioning normally, Since it is possible to determine that the bearing of the guide roller needs to be replaced or that the bearing has an abnormal rotation, it is possible to prevent the occurrence of scratches or the like due to the defective rotation of the guide roller. Further, in the roller guide device of the above example, the hydraulic pressure applied to the hydraulic cylinder 6 with respect to the peripheral speed of the guide roller 4 immediately after the disassembly and maintenance of the roller guide has been completed and the roller guide has been incorporated into the rolling line and started the operation is recorded. , Compare this hydraulic pressure with the hydraulic pressure applied to the hydraulic cylinder against the peripheral speed of the guide roller when the roller guide is no longer smooth because the roller guide has been used for a long time and the time for disassembly and maintenance is approaching. By doing so, it is possible to determine the time when the roller guide needs to be disassembled and maintained, and to detect the rotation failure of the guide roller due to the occurrence of an abnormality in the bearing.

In the guide method by the roller guide device of the above example, the rolling speed S of the rolled material, the peripheral speed V of the guide roller and the hydraulic pressure of the hydraulic cylinder 6 can be used as parameters to detect the defective rotation of the guide roller. As a result, scratches on the rolled material due to poor rotation of the guide roller can be prevented.

When the vibration of the rolled material is very large, such as when a looper is arranged on the upstream side of the roller guide, two pairs of guide rollers are arranged at the front and rear so that the distance between the pair of guide rollers at the preceding stage is large. Is set wider for the rolled material to suppress the vibration of the rolled material, and the distance between the pair of guide rollers in the latter stage is set to be almost the same as that of the rolled material, and this guide roller accurately guides the rolled material to the rolling rolls. In the guide roller device configured as described above, since the rolled material does not always come into contact with the guide roller in the preceding stage, the relationship between the rolling speed S and the peripheral speed V of the guide roller is in the range of S ≧ V ≧ 0.7S. By doing so, it is possible to guide with the optimum rolled material binding force of the guide roller.

The fluid pressure cylinder is not limited to a hydraulic cylinder such as a hydraulic cylinder, but may be a pneumatic cylinder or the like.

[0016]

According to the rolled material guiding method of the present invention,
Since the rolling speed of the rolled material passing through the roller guide and the peripheral speed of the guide roller are used as parameters, the wrapping force of the rolled material is adjusted so that the peripheral speed falls within a predetermined range with respect to the rolling speed of the rolled material. The rolled material can always be guided by the optimal rolled roller wrapping force of the guide roller, and therefore rolled material with high dimensional accuracy can be rolled. In addition, since the rolling material wrapping force of the guide roller can be adjusted by the fluid pressure cylinder controlled by the control device so that the peripheral speed of the guide roller with respect to the rolling speed of the rolling material can be kept within a predetermined range, the rolling material is always optimized. The guide material can be guided by the wrapping material wrapping force of a simple guide roller, which enables rolling of the rolled material with high dimensional accuracy.

[Brief description of drawings]

1 is a plan view showing an embodiment of a roller guide device Ru used in the present invention.

2 is a front view showing a use state of an embodiment of a roller guide device Ru used in the present invention.

Figure 3 is a schematic basic configuration diagram showing a roller guide device Ru used in the present invention.

[Explanation of symbols]

 1 Guide Box 2 Roller Holder 3 Support Pin 4 Guide Roller 5 Measuring Device (Rotation Sensor) 6 Fluid Pressure Cylinder (Hydraulic Cylinder) 8 Rolling Material Detector 9 Pressure Sensor 10 Controller 11 Rolling Roll W Rolling Material

Claims (1)

[Claims] 1. A roller holder rotatably supported by the roller holder.
The guide roller and the rolling material wrapping force of the guide roller
To rotate the fluid pressure cylinder and the guide roller
Measuring device for measuring the number and rolling speed S of rolled material
(M / sec) and the guide roller peripheral speed V (m / sec)
A controller equipped with a control device for comparison calculation as a parameter
Using Ragaido device, until the rolled material is Shirinuke from bite to the guide roller, a rolling speed of the rolling material obtained from the diameter of the rolling roll and the rotational speed S (m / sec) , The fluid pressure cylinder is adjusted through the controller so that the relationship between the guide roller diameter and the peripheral speed V (m / sec) of the guide roller obtained from the number of rotations is S ≧ V ≧ 0.7S.
A method for guiding a rolled material of a roller guide, which comprises adjusting the rolled material wrapping force of a guide roller.