JP2539993B2 - Strip end cutting equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a strip end face cutting device for cutting a strip end face in a pretreatment facility for a steel pipe manufacturing line.

[0002]

2. Description of the Related Art Conventionally, as disclosed in Japanese Unexamined Patent Publication No. 63-312010, when a strip end face is cut in a pretreatment facility of a steel pipe manufacturing line, the strip width is detected by a linear sensor. Based on the result, the end face cutting margin was calculated, the cutting device cutter position was adjusted, and constant cutting margin cutting or constant strip finishing width cutting was performed.

[0003]

However, in the above-mentioned conventional end face cutting device, EPC (edge position control) and CPC (center position control) are used, and these require a large-scale control device, which is costly. It is expensive. Further, the position holding of the cutter is unstable because the cylinder is held by CPC or EPC, and it is difficult to hold the position reliably.

Further, since the strip width is detected by the linear sensor and the end face cutting margin is calculated based on the result to control the position of the cutter, a response delay in the movement of the cutter occurs and the cutting is performed according to the set cutting margin. There was a problem that I could not. Then, when an attempt is made to accurately respond to the movement of the cutter, there is a problem that a hunting phenomenon occurs in the holding cylinder of the cutter, resulting in poor cutting and poor cutting accuracy.

The present invention has been devised in order to eliminate such disadvantages of the prior art, and its main purpose is to ensure that the cutter follows variations in strip width, strip camber, and strip meandering. An object of the present invention is to provide an end face cutting device for a strip that can be formed and can accurately cut the end face cutting margin.

[0006]

According to the present invention, there is provided a cutter for cutting an end surface of a strip, and
A strip end face copying roller arranged immediately near the entrance side of the cutter, a copying roller position setting and holding device for setting and holding a cutting amount which is a relative position between the copying roller and the cutter, and the copying roller and the cutter. This is achieved by comprising a cutting head equipped with a roller and a position setting and holding device, and a copying cylinder that moves the cutting head in the strip width direction and presses the copying roller against the strip end surface. The end face cutting device of this strip is provided with an entrance side plate width detecting device for detecting the width of the cutter entrance side strip in order to change the cutter cutting amount due to the variation of the strip width by the position setting holding device.

[0007]

In the strip end cutting device of the present invention, the cutter and the copying roller are mechanically held by the position setting and holding device so that the positional relationship is not broken.
Can reliably cut with a constant cutting margin. Then, the copying roller can always be pressed against the strip end surface by the copying cylinder to reliably copy the strip end surface, and the cutter can follow the fluctuation of the strip width, the camber of the strip and the meandering of the strip surely, and the cutting margin of the end surface is accurate. Can be cut.

Incidentally, the recent strip plate width accuracy is almost constant except for a slight portion of the leading end and the tail end of the strip, and the central portion is cut with a constant cutting margin as described above. Also, for the tip and tail ends of the strip, change the cutter cutting amount due to the strip width variation with the position setting holding device by the entry side plate width detection device that detects the strip width provided on the entry side of the cutter. It is possible to perform constant end face cutting.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings of the embodiments. FIG. 1 is a plan view of an end surface cutting device for a strip, and FIG. Has
The relationship between the cutting head and the strip end surface copying apparatus is shown. Reference numeral 1 denotes a strip, which travels by a pinch roll 3 fixed to a base portion 7 in front of or behind the end face cutting device 2, and a pair of inlet side guide rolls 4 also fixed to the base portion 7 prevent meandering. There is.

The end face cutting device 2 is provided with a pair of cutting heads 8 which are movable in a direction perpendicular to the sheet passing direction of the strip 1 on the width adjusting frame 18, and each cutting head 8 is provided.
Is provided with a cutter 9 that is driven and rotated by incorporating a cutting tip 10 that can cut the end surface of the strip 1, and a copying roller 12 that follows the end surface of the strip 1. Further, a width adjusting frame 18 is provided for moving each cutting head 8 in a direction perpendicular to the strip passing direction of the strip 1 in accordance with the change of the width of the strip 1. A cutter drive motor 11 drives and rotates the cutter 9, and is provided in each cutting head 8.

The width adjusting frame 18 is placed on the fixed frame 6 provided on the base portion 7, and the width adjusting frame drive motor 19 allows the width adjusting frame 18 to pass through the width adjusting drive shaft 17 and the screw portion 21 in the strip passing direction of the strip 1. Move at a right angle to
Initialize the stop position of the cutting head 8. The position detection at that time is performed by the width adjustment frame position detection PLG 20.

The cutting head 8 is provided on the width adjusting frame 18 and can be moved by the copying cylinder 16 in a direction perpendicular to the sheet passing direction of the strip 1.
The movement amount of the cutting head 8 is set to about 100 mm in consideration of replacement of the cutter 9.

A copying roller 12 for copying the end surface of the strip 1
Is incorporated in the cutting head 8 together with the cutter 9, and these can be moved in a direction perpendicular to the strip passing direction of the strip 1 by the copying cylinder 16,
It follows the width variation and meandering of the strip 1.

Further, the copying roller 12 is independently driven by the cutting margin setting drive motor 13 via the screw portion 15 in the cutting head 8 in the direction perpendicular to the sheet passing direction of the strip 1 while the cutter 9 is left as it is. Since it is possible to move, it is possible to change the margin. That is, the copying roller 1
The amount of deviation in the direction perpendicular to the line between the end face of No. 2 and the end face of the cutting tip 10 is the cutting margin. This deviation amount is detected by the cutting margin setting PLG 14 provided in the cutting margin setting drive motor 13.

Next, the operation of the end face cutting device of the present invention will be described below. First, the strip 1 is conveyed to the pinch roll entrance side plate width detection device 5 and the strip width is detected. Then, the difference between the strip width on the entry side and the strip setting width after the end face cutting is calculated to set the cutting margin. By the cutting margin, the copying roller 12 is retracted from the end surface of the cutter by the cutting margin. At this time, the cutting head 8 is retracted by the copying cylinder 16 so that the copying roller 12 does not hit the end surface of the strip 1, and the opening of the width adjusting frame 18 is set to an opening according to the strip width. It is set.

In this state, the tip of the strip is advanced to the copying roller 12, the copying cylinder 16 is moved in the strip direction, and the copying roller 12 is pressed against the strip end surface. After that, the cutter 9 is rotated and the strip 1 is advanced to cut the strip end surface to the set cutting margin.

The cutting margin setting of the cutter 9 based on the variation of the strip width on the inlet side is performed by calculating the difference between the strip width on the inlet side and the strip setting width after the end face cutting, and based on the calculated value, the copying roller 12 is cut. The setting drive motor 13 rotates the screw 15 to move the copying roller 12 (FIG. 3).

Since the copying roller 12 is constantly pressed against the strip end surface by the copying cylinder 16 via the cutting head 8, it moves following the strip end surface. Further, the relative position between the cutter 9 and the copying roller 12 is mechanically locked by the cutting margin setting screw 15 and held in position, so that it does not change unless the screw is rotated. Further, since the copying roller 12 and the cutter 9 are provided at the closest positions in the cutting head 8, there is no response delay and the plate width accuracy is very good.

Further, the strip width accuracy of the strip used in the recent steel pipe manufacturing line is finished to a substantially uniform width except for the leading end portion and the tail end portion of the strip. In that case, the steel pipe may be manufactured by cutting only the leading end and the tail end of the strip having the wider plate width, and performing the as-roll (as-rolled state) at the center. in this case,
Since the end face of the central part is hardly cut, the copying roller and the cutter surface are aligned at the same position.

[0020]

According to the end face cutting device of the present invention, since the cutter and the copying roller are normally mechanically held by the position setting and holding device so as not to lose the positional relationship, the cutting margin Certain cutting can be done reliably. And
The copying roller can always be pressed against the strip end surface by the copying cylinder to reliably copy the strip end surface, and the cutter can follow the variation of the strip width, the camber of the strip and the meandering of the strip, and the cutting margin of the end face can be cut accurately. .

Further, since the copying roller and the cutter are provided at the closest positions in the cutting head, there is no delay in response and
The width accuracy is very good. Furthermore, as in the past, EPC
It is possible to provide an inexpensive end face cutting device without using an expensive control device such as a CPC or CPC.

[Brief description of drawings]

FIG. 1 is a plan view of an end surface cutting device for a strip.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a diagram showing a relationship between a cutting head and a strip end surface copying roller.

[Explanation of symbols]

 1 Strip 2 End Face Cutting Device 3 Pinch Roll 4 Entry Side Guide Roll 5 Entry Side Width Detection Device 6 Fixed Frame 7 Foundation 8 Cutting Head 9 Cutter 10 Cutting Tip 11 Cutter Drive Motor 12 Copying Roller 13 Cutting Width Setting Drive Motor 14 Cutting Width Setting PLG 15 Screw part 16 Copying cylinder 17 Width adjustment drive shaft 18 Width adjustment frame 19 Width adjustment frame drive motor 20 Width adjustment frame position detection PLG 21 Screw part 22 Copying roller position setting holding device

 ─────────────────────────────────────────────────── --- Continuation of front page (56) References JP-A-60-238213 (JP, A) JP-A-1-321107 (JP, A) JP-A-63-312010 (JP, A) JP-A-62-1 208815 (JP, A)

Claims (2)

(57) [Claims] 1. A cutter for cutting an end face of a strip, a strip end face copying roller disposed immediately near the entrance side of the cutter, and a cutting amount which is a relative position between the copying roller and the cutter are set, and a position is set. A copying roller position setting and holding device that holds the cutting head, a cutting head equipped with the cutter, the copying roller, and the position setting and holding device, and a copying cylinder that moves the cutting head in the strip width direction and presses the copying roller against the strip end surface. An end surface cutting device for a strip, characterized in that 2. An input side plate width detection device for detecting the strip width on the cutter input side is provided in order to change the cutter cutting amount due to the strip width variation by the position setting and holding device. An end face cutting device for the strip as described.