JPH05123734A - Guide controller for shape rolling mill - Google Patents

Abstract

PURPOSE:To roll a shape excellent in shape with high dimensional accuracy by always accurately guiding the shape to a prescribed position of a caliber of a rolling roll. CONSTITUTION:The guide controller is provided with a) pairs of rollers 19a, 19b/13a, 13b which are arranged before and/or behind a rolling roll 15 and clamp both side ends of stocks 10a, 10b, b) guide moving devices 21, 22, (23), (25a), (25b), 12 and 18 for moving integrally the pair of rollers 13a, 13b in parallel to a rotary shaft of the rolling roll 15, c) a shape detector 11 for shape which is arranged on an outlet of a caliber 16 of the rolling roll 15 and detects a position of both side ends of the shape 10b comes out of the caliber 16, and d) a controller (28) for controlling the guide moving devices (motors) 21, 22 based on an output from the shape detector 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a profile rolling mill,
The present invention relates to a device for controlling the position of a profile with respect to the hole shape of a rolling roll.

[0002]

2. Description of the Related Art When rolling a shaped steel having a non-flat cross section (or a shaped material made of a metal other than steel) such as an angle or a T-shaped steel, as shown in FIG. Forming and rolling. At this time, if the position of the material 42 with respect to the hole die 41 of the rolling roll 40 shifts to the left and right, it is impossible to obtain a shaped steel having a correct shape. For example, in the case of an equilateral angle, if the position of the material 42 with respect to the hole die 41 shifts to the left and right, the lengths of the left and right sides will differ. In the case of any shape steel, the allowable range for the shape and dimensions is set by the standards such as JIS and agreement specifications between sellers and purchasers. If it comes off, the shaped steel loses its commercial value.

In order to prevent the defective shape of the shaped steel due to the displacement of the material with respect to the hole shape of the rolling roll,
Conventionally, guides as shown in FIG. 6 or 7 are provided in front of and behind the rolling rolls. The guide shown in FIG. 6 is provided with fixing plates 52 on both sides of the material 51, and the guide shown in FIG. 7 is provided with rollers 53 on both sides so that the material 51 is not easily scratched.

The distance S between the guides is determined as follows. When a shaped steel having a width of the rolling roll in the rotation axis direction of W ₀ ± ΔW ₀ is to be obtained, in the i-th rolling pass, the width W _i ± corresponding to the final dimension W ₀ ± ΔW ₀ of the rolling pass.
It is manufactured with a target of ΔW _i . The spacing S between the rolling guides in each pass is set to be a value slightly larger than the maximum dimension in consideration of the variation in the temperature of the material during rolling and the variation in the dimension of the rolled material. If this is expressed by an equation, S = (W _i + ΔW _i ) · (1 + β · t) + 2 · α. However, W ₀ ± ΔW ₀ : final rolling dimension (W ₀ : target value, ΔW ₀ : tolerance, room temperature conversion value) W _i ± ΔW _i : target dimension in the i-th rolling pass (W _i : target value, ΔW _i : Tolerance, both room temperature conversion values α: Material of maximum dimension including tolerance (Dimension W _i + Δ)
Gap dimension on one side when rolling W _i ) β: coefficient of thermal expansion t: difference between rolling temperature and room temperature

Therefore, the average value of the gap between the rolled material and the guide (the average value of the right-side clearance and the left-side clearance) ΔS is ΔS = ΔW _i · (1 + β · t) / 2 + α (rolled material size is W _i =) (When the rolled material size is W _i + ΔW _i ). Although it is desirable that the value of α is originally set to zero, it is actually necessary to secure a certain value in view of variations in guide settings during operation.

[0006]

As described above, the interval S between the rolling guides is the maximum dimension (W _i + Δ mentioned above) in consideration of the tolerance.
Even when the material of W _i ) is rolled, the rolled material is set to pass smoothly. Therefore, there is no problem when rolling a material with a larger dimension within the tolerance, but when rolling a material with a smaller dimension within the tolerance, the gap 55 between the guides 52, 53 and the material 51 becomes large. The rolling material 51 is likely to shift to the left and right. For this reason,
For example, when the shaped steel is an equilateral angle, there arises a disadvantage that the cross-sectional shape of the product becomes asymmetrical.

The present invention has been made in order to solve such a problem, and an object of the present invention is to always guide the profile to a predetermined position with respect to the roll hole die, thereby achieving high precision. It is an object of the present invention to provide a guide control device for a profile rolling machine capable of rolling a profile that satisfies the shape standard.

[0008]

According to the present invention made to solve the above-mentioned problems, in a guide control device of a rolling mill for rolling a material into a profile by passing the material through a hole of a rolling roll, a) rolling A guide arranged before and / or after the roll for positioning the material, b) a guide moving device for moving the guide parallel to the rotation axis of the rolling roll, and c) arranged at the exit of the hole type of the rolling roll, A profile material position detector that detects the positions of both ends of the profile material that emerges from the hole die, and d) a control device that controls the guide moving device based on the output from the profile material position detector. Characterize.

It should be noted that, instead of the profile member position detector of c), c2) a configuration which is arranged at the outlet of the hole die of the rolling roll and detects the positions of both side edges and characteristic points of the profile material coming out of the hole die. A material shape detector may be used.

[0010]

Since the axial position of the rolling roll is usually fixed, the position of both side edges of the profile coming out of the hole shape of the rolling roll can be detected by the similarly fixed profile position detector c. Position (or displacement) of the profile with respect to the hole type
Can be detected. If the raw material is fed into a predetermined position with respect to the hole shape of the rolling roll, the profile is rolled exactly according to the desired shape. Therefore, when the profile is displaced from the predetermined position of the hole shape, the control device d controls the guide moving device b based on the detection result of the profile position detector to move the guide a to move the position of the profile. The shape can be rolled into a desired shape by changing the shape with respect to the hole shape.

By using the shape member shape detector c2 instead of the shape member position detector c, the shape itself of the rolled shape member can be detected. Here, the feature points of the profile detected by the profile shape detector c2 are
For example, it is the ridgeline of an angle section and the center beam of T-section steel. In the case of an equilateral angle profile, this ridge line must be located exactly at the center of both ends. Also, in the case of unequal side angle profile, the ridge line is
Whether it should be in the position of is determined by a certain allowance range according to the specifications. Since the profile shape detector c2 detects not only the positions of both side ends of the profile but also the positions of the characteristic points thereof, it is possible to detect how much the profile of the profile deviates from the desired shape. Therefore, even if the rolled profile deviates from the predetermined shape due to some trouble such as the positional deviation of the rolling rolls, the invention of this configuration detects it and moves the guide to form the hole in the profile. The mold can be put back in place.

Here, the shape member position detector or the shape member shape detector is composed of, for example, photosensitive elements (line sensors) arranged in one row and an optical system for forming an image of the shape member thereon. You can The detection light may be visible light or infrared light. The positions of both ends are
It can be detected as the boundary between the element that the light from the profile comes and the element that does not come, and the position of the feature point is the position where the intensity of the light from the profile changes suddenly or the intensity of the light (or infrared) is minimal. It can be detected as the position of a point or the like. It is also possible to facilitate the detection of the feature points by disposing a light source on the side of the line sensor and irradiating the profile with the light source obliquely.

The profile shape detector sends signals to the control unit about the positions of both side ends and the positions of the characteristic points. The control device calculates how much the shape of the shape member deviates from the predetermined shape, and determines whether or not it is within the allowable limit. The allowable limit here is preferably stricter than the allowable limit of the shape standard of the profile according to JIS or specifications. When it is determined that the deviation of the shape of the profile detected at the exit of the die of the rolling roll exceeds the allowable limit, the control device instructs the guide moving device to move the position of the guide. .. The guide moving device accordingly moves the position of the guide in a direction parallel to the rotation axis of the rolling roll, and corrects the profile so as to approach a predetermined position with respect to the roll die. By such feedback control, the predetermined shape of the profile is ensured.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a plan view of an angle section rolling mill incorporating a guide according to the present invention. In this embodiment, a pair of guide rollers 19a, 19b / 13a, at the front and rear of the roll 15 of the rolling mill and at the inlet and outlet of the hole die 16 (in FIG. 1, the lower one is the inlet and the upper one is the outlet), respectively. 13b is provided. Each guide roller pair 13a, 13b / 19a, 19b
Are rotatably held on the respective bases 12 and 18, and the bases 12 and 18 are moved by motors 21 and 22 in parallel with the rotation axis of the rolling roll 15.

FIG. 2 shows the roller pair 13a, 13b on the outlet side and the moving mechanism thereof. The pair of rollers on the inlet side 19
The rollers a and 19b are the same as those in FIG. 2 except that the roller intervals are slightly different. Each guide roller 13a, 1
3b is tapered so as to be slightly narrowed downward, and flanges 24a and 24b are provided at the lower end thereof. Both guide rollers are the same base 12 as described above.
The guide rollers 13a and 13b are erected rotatably above, and the distance between the guide rollers 13a and 13b at the lower end portion of the taper is set to a maximum value of the width of the angle steel coming out from the rolling roll 15 in the roll rotation axis direction. Value obtained by adding value 2α (S =
It is set to be (W _i + ΔW _i ) · (1 + β · t) + 2 · α).

At the lower part of the base 12, two legs 25a and 25b having internal threads are provided, and the feed screw 23 passing through these is rotated by the motor 21 so that the base 12 is fed with the feed screw 23. Move along. As shown in FIG. 1, both guide roller pairs 13a, 13b / 1
Since the feed screws 9a and 19b are provided parallel to the rolling roll 15, both guide roller pairs 13a and 13b / 1
9a and 19b are movable parallel to the rotation axis of the rolling roll 15 while keeping the distance between the guide rollers constant.

After the pair of guide rollers 13a and 13b on the exit side of the rolling roll 15, the profile shape detectors for detecting the positions of both ends of the angle section steel 10b coming out of the hole die 16 of the rolling roll 15 are provided. The linear sensor 11 is provided. The linear sensor 11 is formed by arranging photosensitive elements in a horizontal row, and the angle section steel 1 heated to the rolling temperature is used.
The visible light or infrared rays emitted from 0b are detected. The linear sensor 11 includes an optical system for forming an image of the profile 10b on the photosensitive element.

As shown in FIG. 3, the detection signal from the linear sensor 11 is sent to the controller 28 via the amplifier 27. In the controller 28, the guide roller pair 13
In order to control the positions of a and 13b to bring the rolled material to a predetermined position with respect to the roll die, a process as shown in FIG. 4 is performed. First, the data of the positions of both ends of the rolled material 10b is input from the linear sensor 11 (step S1). The positions of the both ends can be detected as positions where the intensity of visible light or infrared light suddenly changes, regardless of the shape of any shape.

Next, the center position of the angle section steel 10b rolled by the rolling rolls 15 is calculated by averaging the data of both side end positions (step S2). Then, the center position of the angle section steel 10b is compared with the predetermined range stored in the memory (step S3). The predetermined range stored in the memory means the center position (corresponding to the position of the ridgeline of the angle in this case) of the hole die 16 of the rolling roll 15 as a center, and on both sides of the center position of the angle-shaped steel to be the product. A predetermined range is provided in consideration of the allowable range of the deviation between the left and right sides (difference in length between the left and right sides). As a result of the comparison, if the center position of the angle section steel 10b is within the predetermined range, the controller 28 does nothing. However, when the center position exceeds the predetermined range, it is determined in which direction the center position is exceeded (step S4), and accordingly, the rolling material 10a and the rolled shaped steel 10b are formed into the hole shape of the rolling roll 15. Both motors 21 and 22 are rotated in the forward direction (step S5) or in the reverse direction (step S6) so as to come to the correct position with respect to 16. As a result, the pair of guide rollers 13a, 13b / 19a, 19b move, and the deviation between the right and left sides of the angle section steel 10b comes back within the predetermined range.

The linear sensor 11 and the controller 28 used in the above embodiment can detect not only the position of the side end portion of the rolled material 10b but also its characteristic points.
In the case of the above embodiment, since the profile is angle section steel,
The feature point is the ridge line 14. Since the temperature of the ridge 14 is slightly lower than that of the other portions, the intensity of visible light and infrared light is lower than that of the other portions. Therefore, the position of the ridge line 14 can be detected as the minimum point of the intensity curve of the detection light of the linear sensor 11. When an infrared sensor (temperature sensitive sensor) is used as the photosensitive element, it can be detected as a minimum point of temperature. Furthermore,
A method of arranging a strong light source beside the linear sensor 11 and irradiating the angled steel 10b from above obliquely to change the brightness between both sides of the angled steel 10b and detect the ridge line 14 as a boundary between them. There is also. Even when the rolled material 10b has a shape other than the angle (for example, T-shaped steel), the linear sensor 11 can detect the characteristic point because the temperature similarly decreases or the reflectance changes.

As described above, when detecting the positions of the characteristic points in addition to the left and right ends, the projected lengths of the left and right sides of the angle section steel 10b can be calculated based on these data. Therefore, the following processing can be performed based on this data. That is, the lengths of the left and right sides are stored in a memory within a predetermined range of the side length of the angled steel (in the case of unequal side angle steel, the predetermined range is stored for each length of the side. ), And if the calculated projection length is within the predetermined range, nothing is done. When the calculated projected length exceeds the predetermined range, it is determined which side is longer, and the rolled material 10a and the rolled shaped steel 10 are correspondingly determined.
Both motors 21 and 22 are rotated so that b is in the correct position with respect to the die 16 of the rolling roll 15. As a result, even if the position of the hole die 16 of the rolling roll 15 deviates in the axial direction due to wear of the hole die or the like, the apparatus of the present embodiment surely catches the change in shape of the rolled material 10b. , Both guide roller pairs 13a, 13b / 19a,
By moving 19b, the lengths of both sides of the angle section steel 10b can be set within the predetermined range again.

This can be effectively applied to, for example, increasing the operating rate of equipment, which is one of the most important problems in the operation of rolling mills at present. That is, in the current operation of the rolling mill, a considerable amount of time is spent for positioning the guide, but by using the guide control device according to the present invention, the guide positioning adjustment time can be greatly shortened, and the facility operation rate can be increased. Can be raised.

In the above embodiment, the guide roller pair is provided before and after the rolling roll, but such a movable guide roller pair may be provided only before or after the rolling roll. At this time, when the guide roller pair is provided only on the outlet side of the rolling roll, it is desirable to provide a conventional guide as shown in FIGS. 6 and 7 on the inlet side. Further, the guide may be a fixed type as shown in FIG.

Further, in the above embodiment, the angle section steel is exemplified as the shape of the profile to be rolled, but the above-mentioned unequal side angle or T section steel, etc. must be formed in the rolling roll to form a hole. The invention is equally applicable to machines. Of course, the rolled material can be applied to any metal such as titanium other than steel.

[0025]

The guide control device for the profile rolling mill according to the present invention detects the position (and also the shape in some cases) of the profile after rolling, and accordingly, the rolling material (before rolling). And / or move the guide so that the profile (after rolling) is in the correct position with respect to the die of the rolling roll. Therefore, it is possible to always roll a shaped material having an accurate shape with high accuracy.

[Brief description of drawings]

FIG. 1 is a plan view of an angle section rolling mill equipped with a guide control device according to an embodiment of the present invention.

FIG. 2 is a front view of a roller guide pair of the guide control device according to the embodiment.

FIG. 3 is a block diagram showing a control system of the guide control device according to the embodiment.

FIG. 4 is a flowchart of processing performed by the controller of the guide control device according to the embodiment.

FIG. 5 is a vertical cross-sectional view showing a hole die of a rolling roll and a profile.

FIG. 6 is a front vertical sectional view of a conventional plate-shaped guide for a profile rolling mill.

FIG. 7 is a front vertical sectional view of a conventional roller guide for a profile rolling mill.

[Explanation of symbols]

 10a ... Rolling material 10b ... Angle section steel (section material) 14 ... Ridge line 11 ... Linear sensor (section material shape detector) 13a, 13b, 19a, 19b ... Guide roller 15 ... Rolling roll 16 ... Hole type 21, 22 ... Motor (Guide moving device) 28 ... Controller (control device)

Claims (2)

[Claims] 1. A guide control device for a rolling mill, which rolls a material into a profile by passing the material through a die of a rolling roll, comprising: a) a guide which is arranged before and / or after the rolling roll and which positions the material. b) a guide moving device that moves the guide parallel to the rotation axis of the rolling roll; and c) a profile that is located at the exit of the die of the rolling roll and that detects the positions of both ends of the profile that comes out of the die. A guide controller for a profile rolling mill, comprising: a position detector; and d) a controller that controls a guide moving device based on an output from the profile position detector. 2. A guide control device for a rolling mill, which rolls a material into a shape by passing the material through a die of a rolling roll, comprising: a) a guide which is arranged before and / or after the rolling roll and which positions the material. b) A guide moving device that moves the guide parallel to the rotation axis of the rolling roll, and c2) Detects the positions of both side edges and feature points of the profile that is placed at the exit of the rolling die of the rolling roll. And a controller for controlling the guide moving device based on the output from the profile member shape detector.