JPS6153123B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for detecting biting and omission of a rolled material in a width rolling machine that rolls down a rolled material in the width direction by vertical rolls, and in particular, the present invention relates to a method for detecting biting and omission of a rolled material in a width rolling apparatus that rolls a rolled material in the width direction by vertical rolls. The present invention relates to a method for detecting bite-through of a rolled material in a width rolling apparatus, which can always optimally determine the tip crop shape of the material and the setting accuracy of the vertical roll opening.

Generally, in a rolling device that rolls down a material to be rolled using rolls, detecting the timing of plate biting (hereinafter referred to as metal-in) and biting-through (hereinafter referred to as metal-off) of the rolls is used to control the roll reduction of the rolls. It has become extremely important in carrying out. Therefore, in a conventional plate thickness rolling apparatus that rolls down the material to be rolled in the thickness direction using horizontal rolls, the rolling load applied to the horizontal rolls is applied before and after the material to be rolled is bitten by the horizontal rolls.
Alternatively, the rolling load applied to the horizontal roll can be detected using a load cell, etc., and metal-in and metal-off can be detected from the change in the rolling load by taking advantage of the fact that the rolling load changes significantly during and after biting through. That's what I do. On the other hand, in recent years, width rolling equipment (width rolling equipment) that rolls down the rolled material in the width direction with vertical rolls has been developed in order to improve the width accuracy of the rolled material, mainly for the purpose of preventing yield reduction due to cutting of both ends of the rolled material. (hereinafter referred to as "edger") has also come to be used. The conventional method for detecting metal-in and metal-off in this edger is as follows:
This method uses the metal-in/metal-off detection method used in the conventional plate thickness rolling equipment that uses horizontal rolls to roll down the rolled material in the thickness direction, and detects the separation force (rolling load) applied to the vertical rolls instead of the horizontal rolls. A load cell is used. That is,
For example, as shown in FIG. 1, a pair of vertical rolls 12 for rolling down a material to be rolled 10 in the width direction, and a vertical roll chock 1 that rotatably supports the vertical rolls 12.
4. A vertical roll drive shaft 16 for rotationally driving the vertical roll 12, a vertical roll reduction screw 20 for pressing the vertical roll chock 14 in the horizontal direction via a vertical roll reduction pressure block 18, and the vertical roll. Worm wheel 22 fitted to the reduction screw 20, the worm wheel 2
a worm shaft 24 for rotationally driving the worm shaft 24; a vertical roll lowering electric motor 26 for rotationally driving the worm shaft 24; a balance device 28 consisting of, for example, a spring or a hydraulic cylinder; In an edger having a movement amount detection device 30 for detecting the amount of movement and an edger housing 32, a load cell 34 is provided between the vertical roll reduction screw 20 and the vertical roll reduction pressure block 18, and usually, Reference value output device 3 consisting of a voltage generator
6 and a comparator 38, and when the vertical roll separation force detected by the load cell 34 exceeds a predetermined value set by the reference value output device 36, the comparator 38 detects metal-in and outputs it. On the other hand, when the output of the load cell 34 falls below the output of the reference value output device 36, the comparator 38 detects metal-off and outputs it. Further, as mentioned above, the output of the load cell 34 is immediately sent to the reference value output device 3.
In addition to comparing with the output of load cell 34
There are also methods in which metal-in or metal-off is detected by detecting the rate of change in the output of the metal, or a combination of these methods.

However, this method of detecting the vertical roll separation force has the following problems, and has the disadvantage that optimal width control start/end timing cannot be obtained. In other words, in general, the roll separation force (rolling load) generated by vertical rolls is smaller than that of horizontal rolls, and the rate of change in separation force due to roll opening setting errors is large. arise.
Moreover, as shown in FIG. 2A or B, the rolled material 10
The cropped shape of the tip is usually not rectangular,
This change in crop shape causes the vertical roll to become depressed due to the center part being depressed compared to both side ends (Fig. 2A) or the center part protruding compared to both side ends (Fig. 2B). The separation force also changes, causing variations in detection timing.

Incidentally, in the above description, an example was shown in which the vertical roll reduction screw 20 is electrically driven by the vertical roll reduction electric motor 26, but the above-mentioned drawback is that in an edger in which the reduction device is hydraulically driven by a hydraulic cylinder, A similar method exists for detecting metal-in/metal-off by detecting pressure changes within a hydraulic cylinder.

The present invention has been made in order to eliminate the above-mentioned conventional drawbacks, and regardless of the setting accuracy of the tip crop shape of the rolled material and the opening degree of the vertical roll, the metal in timing and/or Another object of the present invention is to provide a method for detecting biting and biting of a rolled material in a width rolling apparatus, which can reliably detect the metal-off timing when the rolled material is separated from the vertical rolls.

The present invention provides a method for detecting biting and omission of a rolled material in a width rolling apparatus in which the rolled material is rolled down in the width direction by vertical rolls. At least one rolled material detector is provided to detect the presence or absence of the rolled material, and the metal-in and/or metal-off timing of the vertical rolls is directly detected from the output of the rolled material detector. has been achieved.

Embodiments of the present invention will be described in detail below with reference to the drawings. As shown in FIGS. 3 and 4, this embodiment uses an edger having a vertical roll 12 and a vertical roll chock 14 similar to those of the conventional example.
Four rolled material detectors 42 for detecting the presence or absence of the rolled material 10 are disposed on a support stand 40 fixed to the side of the vertical roll chock 14 on which the rolled material 10 passes, and from the output of the rolled material detectors 42 , metal-in and metal-off timings for the vertical roll 12 are detected.

As the rolled material detector 42, for example, a photoelectric switch, particularly a detector using an optical fiber, can be used.

The action will be explained below. First, before the rolled material 10 approaches the edger, the vertical roll chock 14 is in a retracted state, and therefore,
The rolled material detector 42 is also in a retracted state to the retracted position. Next, when the material to be rolled 10 approaches and is in a standby state in preparation for the start of rolling, the vertical roll chock 14 moves forward, and together with this, the material to be rolled detector 42 fixed to the support stand 40 also moves according to the width of the material to be rolled. The rolled material detectors 42 move forward to the measurement position, and all of the rolled material detectors 42 become ready for measurement. When rolling is started and the tip of the rolled material 10 reaches below the rolled material detector 42, the output state of the rolled material detector 42 changes. Metal-in and metal-off can be detected reliably. In this embodiment, since the width control start/end timing of the edger is directly detected from the output of the rolled material detector 42, compared to the indirect method using a conventional load cell, etc., the rolled material is vertically rolled. It is possible to reliably detect the timing of contact.

In this embodiment, the rolled material detector 42 is
Since it is fixed to a support base 40 fixed to the vertical roll chock 14, the rolled material detector 42 automatically detects the plate of the rolled material depending on the movement state of the vertical roll chock 14, that is, the rolling drive state of the edger. It is moved to a retreat position or a measurement position depending on the width.

In the above embodiments, a photoelectric switch, especially one using an optical fiber, was used as the rolled material detector, but the type of rolled material detector is not limited to this.

Further, in the embodiment, the rolled material detector 4
However, the number and position of the rolled material detectors 42 are not limited to this, and for example, if the vertical roll 12 and the rolled material 10 are in contact with each other, If the purpose is to detect only the timing at which the rolled material is rolled, one rolled material detector 42 may be disposed on the side of the vertical roll 12, as shown in FIG. In addition, when considering the response delay of the edger or when performing feed forward control, the rolled material detector 42 is used as shown in FIG.
can also be arranged at the front and rear sides of the vertical roll 12. Note that if rolling is performed in only one direction, the rolled material detector 42 may be additionally installed only on the entry side of the rolled material. If it is desired to detect the optimum timing depending on the crop shape of the tip end of the rolled material 10, a plurality of rolled material detectors 42 may be arranged in combination as shown in FIG. In particular, as an example of the optimal control start timing, the rolled material 1
If you want to detect when the entire effective width of 0 is bitten by the edger, as shown in FIGS. By detecting metal-in at the time of point detection, the necessary control start timing can be reliably detected regardless of the shape of the end crop of the rolled material 10.

As explained above, according to the present invention, the metal-in timing and/or metal-off timing can be reliably detected regardless of the setting accuracy of the cropped end shape of the rolled material or the opening degree of the vertical roll. Therefore, it has the excellent effect that the edger control start/end timing can always be optimally determined.

[Brief explanation of the drawing]

FIG. 1 is a front view, including a partial block diagram, showing the structure of an edger in which the conventional method for detecting biting of rolled material is adopted, and FIGS. 2A and 2B are
A plan view showing an example of a cropped end shape of a rolled material,
FIG. 3 is a front view showing the main part of the edger in which the method for detecting the biting of rolled material according to the present invention is adopted, FIG. 4 is a plan view thereof, and FIG. FIG. 6 is a plan view showing a modification of the arrangement of the rolled material detector in the method for detecting rolled material biting and omission; FIG. 6 is a plan view showing another modification;
FIG. 7 is a plan view showing still another modification,
FIGS. 8A and 8B are plan views showing still another modification. 10... Material to be rolled, 12... Vertical roll, 14...
...Vertical roll chock, 40...Support stand, 42...
Rolled material detector.

Claims (1)

[Claims] 1. In a width rolling device that rolls down the rolled material in the width direction by vertical rolls, at least one rolled material detector for detecting the presence or absence of the rolled material is installed on a support stand fixed to the rolled material passing side of the vertical roll chock. A width rolling apparatus characterized in that the timing of biting of the rolled material into the vertical rolls and/or the timing of the biting through of the rolled material is directly detected from the output of the rolled material detector. Method for detecting jamming and omission.