JP3017633B2 - Roller guide rolling material guide method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for guiding a rolled material to a roller guide for guiding a rolled material by an optimum embracing force of a guide roller.

[0002]

2. Description of the Related Art In the event that a flaw occurs in a rolled material due to poor rotation of a guide roller, it is necessary to temporarily stop the rolling line and replace it with a spare guide roller. The rolled material that has been rolled until the occurrence of cracks is noticed is treated as an unqualified product, and these cause a decrease in the operation of the factory.

In Japanese Utility Model Application Laid-Open No. 4-108907, a roller guide is provided with a detector for detecting the presence or absence of a rolled material and a roller rotation detector, and the rolled material detector and the roller rotation detector are used to detect the rolled material. When the number of rotations of the roller decreases while the roller passes through a roller guide, a warning is issued as rotation failure, and a technique for preventing the occurrence of scratches and dimensional defects in the rolled material is disclosed.

[0004]

SUMMARY OF THE INVENTION The prior art described above is
Although effective to prevent the generation of flaws due to poor rotation of the guide rollers, it is intended to actively reduce the wear of the bearings of the guide rollers and to prevent the flaws generated by the contact between the rolled material and the guide rollers. The technology is not disclosed.

Accordingly, an object of the present invention is to prevent the flaws between the guide roller and the rolled material and to prevent the bearing of the guide roller from being worn.

[0006]

A first feature of the present invention is as follows.
In the guide step until the leading end of the rolled material passes through the roller guide and bites into the rolling mill, the distance between the guide rollers is adjusted to be substantially the same as the size of the rolled material to guide the rolled material, and In the process of guiding the intermediate part of the rolled material between the time when the leading end of the rolled material bites into the rolling mill and the time when the trailing end comes to the guide roller, the distance between the guide rollers is adjusted to be slightly wider than that of the rolled material. In the guiding process from when the rear end of the rolled material bites into the guide roller until the trailing edge comes off, the distance between the guide rollers is adjusted to be substantially the same as the size of the rolled material. It is to guide the rolled material. A second feature of the present invention is that the rolling speed S (m / s) of the rolled material and the peripheral speed V (m / Seconds)
Is adjusted so that S ≧ V> 0.7S, and while a portion other than the leading end and the trailing end of the rolled material is engaged with the guide roller, The interval between the guide rollers is adjusted so that the relationship between the rolling speed S (m / s) and the peripheral speed V (m / s) of the guide rollers for guiding the rolled material is 0.5S ≧ V ≧ 0. It is in. According to a third feature of the present invention, in the peripheral speed control of the guide roller according to the first or second feature, the leading end portion of the rolled material bites into the rolling mill and the trailing end portion comes off the guide roller. In the meantime, the rolling speed S of the rolled material is determined from the rotation speed of the rolling roll of the rolling mill, and the rotation speed of the guide roller is detected to determine the peripheral speed V of the guide roller from the diameter of the guide roller. The peripheral speed V of the guide roller is controlled by comparing the speed V and the rolling speed S of the rolled material to adjust the distance between the guide roller and the rolled material.

[0007]

[Advantage] Until the leading end of the rolled material bites into the rolling mill, the distance between the guide rollers is adjusted to be substantially the same as the dimension of the leading end of the rolled material to guide the rolled material. It is accurately bitten by the rolling mill. After the end of the rolled material bites into the rolling mill, the distance between the guide rollers is minimized by adjusting the distance between the guide rollers slightly wider than the rolled material and guiding the rolled material. By maintaining it, the occurrence of scratches is prevented, and the wear of the bearing of the guide roller is reduced. Until the trailing end of the rolled material passes through the guide rollers and loses its tail, the distance between the guide rollers is adjusted to approximately the same size as the trailing end of the rolled material, whereby the rolled material is accurately guided.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to better understand the contents of a method for guiding a rolled material of the present invention, an example of a roller guide used in this method will be described with reference to the drawings. The roller guide G shown in FIGS. 1 to 3 has a pair of roller holders 2 supported by a guide box 1 so as to be openable and closable with fulcrum pins 3, and the front side of the roller holder 2 around the fulcrum pins (see FIGS. 2 right), a rotation sensor 5 for rotatably supporting the guide roller 4 and measuring the number of rotations of the guide roller 4 is provided.
Two hydraulic cylinders 6 are fixed on the rear side (the left side in FIGS. 1 and 2), and the rear part of the roller holder 2 is in contact with the piston 7 of the hydraulic cylinder 6. A total of four pressing springs 8 provided at two upper and lower positions between the guide box 1 and the roller holder 2 always contact the piston 7 with the rear side of the roller holder 2 against the roller holder 2 by the spring force. It is pressed to make contact.

As shown in FIGS. 1 and 3, two pistons 7 are arranged in the hydraulic cylinder 6 back to back, and a spring 9 is inserted into the inner cylinder side of each piston 7. One end of the spring 9 is in contact with the cylinder inner wall 6a, the other end is inserted into the piston 7, and the tip of the piston 7 is in contact with the roller holder 2. In order to adjust the interval between the guide rollers 4, if the spring constant of the spring 9 incorporated in the hydraulic cylinder 6 is set to 10 kg / mm, the piston 7 is moved in the direction of contracting 1 mm in order to move the piston 7 in the direction of contraction by 1 mm. It is sufficient to press the spring 9 by applying a pressing force corresponding to a total of 10 kg, so that the piston 7 is moved to a required position by applying a required pressure to the hydraulic cylinder, and the roller holder 2 is opened and closed about the fulcrum 3. Let it.

The control device 10 shown in FIG.
And the peripheral speed V (m / s) of the guide roller, and the peripheral speed V of the guide roller and the rolling speed S (m) of the rolling mill input from the outside.
/ Sec), and instructs the pressure regulator 11 to a required pressure value to adjust the distance between the guide rollers. The pressure regulator 11 is supplied with hydraulic pressure from a hydraulic pressure source 12, and the detector 13 can detect that the leading end or the trailing end of the rolled material reaches the roller guide G.
In FIG. 1, reference numeral 14 denotes electric wiring (shown by a solid line), and 15 denotes hydraulic piping (shown by a chain line).

Next, an embodiment of the method for guiding a rolled material according to the present invention will be described. As shown in FIGS. 1 and 3, in the step in which the roller guide G guides the leading end of the rolled material W, that is, until the leading end of the rolling mill passes through the roller guide and bites into the rolling mill, the rolling is performed first. When the detector 13 detects that the leading end of the material W has approached the roller guide, the controller 10 issues a command to the pressure adjuster 11 to adjust the distance between the guide rollers 4 to approximately the same size as the rolled material. After that, the leading end of the rolled material is guided to the rolling roll R of the rolling mill. The interval is adjusted so that the peripheral speed V and the rolling speed S of the guide rollers while guiding the leading end of the rolled material become required values.

In the step in which the roller guide G guides the intermediate portion of the rolled material W, that is, after the leading end of the rolled material W is engaged with the rolling roll R of the rolling mill, the trailing end is guided by the guide roller 4.
Until the control roller 10 is engaged with the guide roller 4
Is adjusted to be slightly wider than the intermediate portion of the rolled material, and the peripheral speed V of the guide roller is compared with the rolling speed S so that the peripheral speed V of the guide roller becomes a required value. . If the contact pressure between the guide roller 4 and the rolled material is reduced while the intermediate portion of the rolled material W is being guided and the guide roller slips or is in a non-contact state with the rolled material, the guide roller Is reduced and the peripheral speed V of the guide roller 4 with respect to the rolling speed S becomes equal to or lower than a predetermined value. The peripheral speed V of the guide roller 4 is increased by adjusting the liquid pressure and the interval between the guide rollers 4, and the rolled material is always conjugated with the optimum rolled material tying force and guided to the rolling roll R accurately. . When the rolled material W falls while guiding the intermediate portion, the contact pressure between the guide roller 4 and the rolled material increases, and the rotation speed of the guide roller 4 increases. The rotation sensor 5 detects that the rotation speed has increased,
The interval between the guide rollers 4 is adjusted to a required interval to prevent the rolled material from falling down. Here, with respect to the peripheral speed V of the guide roller, if the interval between the guide rollers is wider than the rolled material W, the rolled material does not always contact the guide roller. Is calculated using the average value of the peripheral velocities of a pair of opposing guide rollers, and the measurement time (gate time) of the peripheral velocity is a multipoint type in order to select the optimal measurement time. It is variable by a changeover switch.

Further, in the step of guiding the rear end of the rolled material W by the roller guide G, that is, during the period from when the rear end of the rolled material W bites into the guide roller 4 to when the trailing edge comes off, the rolled material W When the detector 13 detects that the rear end of the roller has reached the roller guide G, the controller 10 issues a command to the pressure regulator 11 to adjust the distance between the guide rollers to approximately the same size as the rolled material. The rear end of the material is guided to a rolling roll R of a rolling mill.

In the embodiment, even if the rolled material falls down when guiding the intermediate portion other than the front end portion and the rear end portion of the rolled material W, the distance between the guide rollers is slightly smaller than that of the rolled material. When the rolled material falls down, the guide roller can immediately embrace the rolled material and guide the rolled material accurately to the rolling mill. If the fall of the rolled material starts to increase, the contact between the rolled material and the guide roller becomes strong, and the relationship of the circumferential speed V of the guide roller to the rolling speed S becomes V ≧ 0.5S. Judge that the fall of the material is large,
By adjusting the distance between the guide rollers to approximately the same size as the rolled material, the rolled material is suppressed from falling and the rolled material is accurately guided to the rolling mill.

In the above embodiment, the rolling speed W of the rolled material W is adjusted so that the leading end to the trailing end of the rolled material W can be guided to the rolling mill with an optimal embracing force and more accurate guiding can be performed. The relationship between (m / sec) and the peripheral speed V (m / sec) of the guide roller may be set as shown in the following equations (1) and (2) in each guide step. In the step of guiding the leading end and the trailing end of the rolled material W with the guide roller 4, the relationship between the rolling speed S and the peripheral speed V of the guide roller is set so that S ≧ V> 0.7S (1). In the step of adjusting the interval between the guide rollers and guiding the intermediate portion other than the front end portion and the rear end portion of the rolled material with the guide rollers, the relationship between the rolling speed S and the peripheral speed V of the guide rollers is 0.5S ≧ V ≧ Adjust the distance between the guide rollers so as to fall within the range of 0 (2). It was found that when the peripheral speed V of the guide roller exceeded the range (range from 0.7S to S) shown in the equation (1), the optimal embracing force gradually decreased. In the equation (2), V = 0.5
It has been found that when the peripheral speed V of the guide roller exceeds 0.5 times the rolling speed S based on S, the falling of the rolled material increases.

The method of controlling the peripheral speed V of the guide roller 4 is as follows. That is, before the leading end of the rolled material W bites into the rolling mill and passes through the guide roller, the rolling speed of the rolled material is calculated from the rotation speed of the rolling roll R of the rolling mill.
, And the rotational speed of the guide roller 4 is detected, the peripheral speed V of the guide roller is determined from the diameter of the guide roller, and the peripheral speed V and the rolling speed S are compared to adjust the distance between the guide roller and the rolled material. Thus, the peripheral speed V of the guide roller is controlled.

[0017]

According to the first aspect of the present invention, the distance between the guide rollers is set to be substantially the same as or slightly smaller than the dimension of the rolled material corresponding to each of the leading, intermediate and rear end guiding steps of the rolled material. Since it is adjusted and guided to spread, it is possible to accurately guide the rolling material from the leading end to the trailing end of the rolled material, and when guiding the intermediate part of the rolled material, the guide between the rolled material and the guide roller By keeping the contact to a minimum, it is possible to prevent the occurrence of scratches on the rolled material and to prevent the friction of the bearings of the guide rollers, so that the rolled material with high dimensional accuracy can be rolled. According to the invention of claim 2, the relationship between the rolling speed S of the rolled material and the peripheral speed V of the guide roller is set to a required value according to each guiding step, so that the rolled material W can be optimally embraced. The leading end to the trailing end can be guided to the rolling mill, and more accurate guidance is possible. According to the third aspect of the present invention, the interval between the guide rollers is adjusted based on the rolling speed and the peripheral speed of the guide rollers, and the peripheral speed of the guide rollers is controlled through this adjustment. Can be performed reliably.

[Brief description of the drawings]

FIG. 1 is a schematic basic configuration diagram of a roller guide used in the present invention.

FIG. 2 is a front view of a roller guide used in the present invention.

FIG. 3 is a partially cutaway plan view of a roller guide used in the present invention.

[Explanation of symbols]

 2 roller holder 3 fulcrum pin 4 guide roller 5 rotation sensor 6 hydraulic cylinder 7 piston 8 pressing spring 10 controller 11 pressure regulator 13 detector G roller guide

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B21B 39/14

Claims (3)

(57) [Claims] In the step of guiding the leading end of a rolled material until the leading end of the rolled material passes through a roller guide and bites into a rolling mill, the distance between the guide rollers is adjusted to substantially the same size as the rolled material. In the step of guiding the intermediate portion of the rolled material from when the leading end of the rolled material bites into the rolling mill until the trailing end bites into the guide roller, the gap between the guide rollers is reduced. In the step of guiding the rear end of the rolled material from when the rear end of the rolled material bites into the guide roller until the trailing edge comes off, the guide roller The method for guiding a rolled material of a roller guide, wherein the distance between the rollers is adjusted to be substantially the same as that of the rolled material. 2. The method for guiding a rolled material of a roller guide according to claim 1, wherein the rolling speed of the rolled material is S (m / sec) while the leading end or the rear end of the rolled material is engaged with the guide roller. ) And the peripheral speed V (m / sec) of the guide roller for guiding the rolled material, the interval between the guide rollers is adjusted so that S ≧ V> 0.7S, and the front and rear ends of the rolled material are adjusted. While the intermediate portion of the rolled material other than the end portion is engaged with the guide roller, the rolling speed S (m / sec) of the rolled material and the peripheral speed V (m / sec) of the guide roller for guiding the rolled material are used. The second method is to adjust the distance between the guide rollers so that the relationship between the first roller and the second roller is 0.5S ≧ V ≧ 0. 3. The rolling roll of a rolling mill according to claim 1, wherein the peripheral speed of the guide roller is controlled until the leading end of the rolled material bites into the rolling mill and passes through the guide roller. The rolling speed S of the rolled material is determined from the rotation speed of the roller, the rotation speed of the guide roller is detected, and the peripheral speed V of the guide roller is determined from the diameter of the guide roller. A method for guiding a rolled material of a roller guide, wherein the peripheral speed V of the guide roller is controlled by adjusting an interval between the guide roller and the rolled material by comparing S with S.