JPH0616966B2 - Continuous cutting device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a continuous cutting device for continuously cutting a long material to be cut with a preset size in a pipe manufacturing line or the like.

[Prior Art] FIG. 8 shows an iron pipe material cutting device of a pipe making line using a conventional shear control device disclosed in, for example, JP-A-60-238299 and JP-A-61-109696. FIG. 1 is a block diagram, in which 1 is an iron pipe material as a long material to be cut which is conveyed in the arrow direction, 2 is a shear device, 3 is a shear control device, 4 is a shear control device 3 and a shear device 2 The cutting command sent, 5 is the cutting length setting unit,
6 is the set cut length data output from the cut length setting unit 5,
Reference numeral 7 denotes a pulse generator, and the pulse generator 7 is attached to a measuring vehicle 8 arranged along the transportation line so as to rotate according to the transportation of the iron pipe material 1. Reference numeral 9 is a pulse train signal output from the pulse generator 7, and 10 is a disconnection command controller.

Next, the operation will be described. The cutting command control unit 10 of the shear control device 3 counts the pulse train signal 9 from the pulse generator 7 attached to the measuring wheel 8 that rotates in accordance with the transport of the iron pipe material 1, and the material movement obtained from the count. When the length becomes equal to the set cut length data 6 set by the cut length setting unit 5, the cut command 4 is output to the shear device 2.

If the set cut length data 6 is set to L, the cut command 4 is output at every interval L as shown in FIG.

Therefore, as shown in FIG. 10, if a defective portion 11 such as a swell of welding is formed on the surface of the iron pipe material 1 in the manufacturing process.
Even if occurs, the cutting command 4 is output at each interval L, so that the shearing device 2 cuts the defective portion 11.

Therefore, the shear device 2 may be damaged and the shear blade may be damaged. Therefore, the disconnection command control unit 10 has a defective portion 1
Assuming that the cutting command 4 is not output in No. 1, the iron pipe material 1 is cut into a length of at least 2 L.
The iron pipe material cut into a length of L entered the cutting material storage area and clogged the transportation line.

[Problems to be solved by the invention]

Since the conventional continuous cutting device is configured as described above, when the defective portion is conveyed, it is necessary to reduce the line speed, when there is a risk of cutting the defective portion that may damage the shear device, or When the cutting exceeds the maximum cutting length of the shearing device, it is necessary to stop the conveying line and stop the cutting work to remove the defective portion. Therefore, there is a problem that the work efficiency of the cutting process is reduced.

The present invention has been made to solve the above problems, and even if a defective portion is conveyed, the defective portion can be continuously removed without decelerating the line to stop the cutting operation. The purpose is to obtain a cutting device.

[Means for solving problems]

The continuous cutting device according to the present invention includes a sensor for detecting a defective portion of the material to be cut that is conveyed to the shear device, a pulse train signal output from a pulse generator according to the conveyance of the material to be cut, and the sensor. A defective portion measuring section which inputs a defective portion presence / absence signal and outputs length data from the tip of the material to be cut to the defective portion and length data of the defective portion, and the material to be cut obtained from the pulse train signal When the moving length is equal to the set cutting length set by the cutting length setting unit, a cutting command is output to the shearing device and the length of the defective portion is longer than the maximum cutting length of the shearing device. A cutting command control unit that stops the transportation of the material to be cut and, when it is short, changes the cutting length and outputs a cutting command to the shearing device so as not to cut at a defective portion while continuing the transportation. It is those equipped.

[Action]

The cutting command control unit according to the present invention outputs a cutting command each time the moving length of the material to be cut becomes equal to the set cutting length and the length of the defective portion of the material to be cut output from the defective portion measuring unit. When it is longer than the maximum cutting length of the shearing device, stop the feeding of the material to be cut, and when it is short, change the cutting length so as not to cut at the defective part while continuing the feeding and issue a cutting command to the shearing device. By outputting
The defective portion can be removed without decelerating and stopping the conveyance line of the material to be cut, the shear device is prevented from being damaged, and the work efficiency of the cutting process is prevented from being lowered.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG. 1 in which the same parts as those in FIG. In FIG. 1, 12 is a sensor which is arranged on the conveying line of the iron pipe material 1 and detects the presence or absence of a defective portion 11 of the iron pipe material 1, 13 is a defective portion presence signal output from the sensor 12, and 14 is Defective portion measuring unit, 15 is length data from the tip of the iron pipe material 1 to the tip of the defective portion 11, and 16 is length data of the defective portion 11.

Next, the operation will be described. When the defective portion measuring unit 14 receives the defective portion existence signal 13 detected by the sensor 12, the pulse train signal 9 from the pulse generator 7 which has been counting is counted.
Based on the material movement length obtained on the basis of the material movement length, the length data 15 from the tip of the iron pipe material 1 to the tip of the defective portion 11 and the length data 16 of the defective portion are calculated to calculate the cutting command control unit 1
Output to 0.

The length of the second figure defective portion measuring unit 14 is defective parts 11 L _D
The cutting command control unit 10 measures the first cutting command 4 after measuring
The length relationship of the iron pipe material 1 at the timing of outputting is shown.

In FIG. 2, the defective portion 11 from the tip of the iron pipe material 1
If the length to the tip and L _A, measured after a length L _D of the defective portion 11, if cutting N times in setting the cutting length L, the defective portion from the tip of the steel pipe member 1 after the cutting 11
The length L _R up to the tip of is L _R = L _A −N × L (where 0 ≦ L _R <L).

The cutting command control unit 10 sets the set cutting length L, the length L _A from the tip of the iron pipe material 1 to the tip of the defective portion 11, the defective portion 1
1 according to the cutting length change flow of FIG. 3 from each data of the length L _D , the maximum cutting length L _X of the shear device 2 and the minimum cutting length L _N of the shear device 2 which are determined by the device structure, as shown below. And the cutting command 4 is output to the shear device 2.

First, the length L _R and the minimum cutting length L _N are compared and judged (step 3-1), and when L _R ≧ L _N , the maximum cutting length L _X and (length L _R + length L _D ) are compared. Judge (step 3-2),
L _X <Figure 4 in the case of _{(L R + L D),} L X ≧ (L R +
In the case of L _D ), the cutting length changing control of FIG. 6 is performed.

In addition, as a result of the comparison judgment in step 3-1 above, L _R <L
_In the case of _N , the maximum cutting length L _X and (length L _R + length L _D ) are compared and judged (step 3-3), and L _X <(L _R + L _D ).
For the case of FIG. _{5, L X ≧ (L R +} L D) performs a cut length change control of Figure 7.

4 and 5 show the case where the tip position of the defective portion 11 is cut, and the length L _R from the tip of the iron pipe material 1 to the tip of the defective portion 11 is zero. That is, in FIG. 4, after measuring the length L _D of the defective portion 11, after cutting N ₁ times at the set cutting length L, the length L _{R and} then the length L _D are cut. In FIG. 5, the calculation of L _R / N ₂ = L ′ (= L) is performed, and the length L ′ is cut N ₂ times and then the length L _D is cut.

Figure 6, Figure 7 shows a case where no cutting tip position of the defective portion 11, after the measurement of the length L _D of the defective portion 11, after N times cut by setting the cutting length L, and the cutting removal of the defective part 11 To do.
In this _case, the length of _(L R + L _D), there is a case the following three.

_(L R _{+ L} D) <When _{L N,} as shown in FIG. 7,
It cuts including the defective part 11 with the minimum cutting length L _N.

L is _N ≦ when _{(L R + L D) ≦} L X, cut at length, as shown in FIG. 6 becomes _(L R + L _D).

When _{(L R + L D)>} L X will stop the conveyor line for steel pipe material 1.

After all, when the length L _D of the defective portion 11 is longer than the maximum cutting length L _X , it is necessary to stop the transport line as in the conventional case, but when it is less than the maximum cutting length, the cutting length is set to L _R as described above. , L _D , L ′, L _R + L _D or L _N so that the shear device 2 does not cut the defective portion 11.

Although the defective portion presence / absence signal is generated by turning on / off the sensor 12 in the above embodiment, the defective portion presence / absence signal may be generated by a push button operation monitored by an operator instead of the sensor 12. Further, in the above embodiment, the example applied to the cutting of the iron pipe material of the pipe making line has been shown, but the present invention is not limited to this, and may be a production line for continuously cutting a long cut material according to a set cutting length. For example, the same effect as that of the above-mentioned embodiment is obtained.

〔The invention's effect〕

As described above, according to the present invention, the position of the tip of the defective portion of the material to be cut and the length of the defective portion are measured, and when the length of the defective portion is shorter than the maximum cutting length of the shearing device, cutting is performed. Since the length is changed automatically, defective parts can be removed without stopping the transportation line of the material to be cut, damage to the shearing device can be prevented, and the work efficiency of the cutting process can be reduced. There is no effect.

[Brief description of drawings]

FIG. 1 is a system configuration diagram of a continuous cutting device according to an embodiment of the present invention, and FIG. 2 is a length of an iron pipe material at a timing when a first cutting command is output after measuring a length of a defective portion. FIG. 3 is a diagram showing the relationship, FIG. 3 is a flow chart for changing the cutting length of the shear control device, and FIGS. 4, 5, 6, and 7 are relationship diagrams between the iron pipe material and the cutting command by the shear control device, 8th
FIG. 9 is a system configuration diagram of a conventional continuous cutting device, and FIGS. 9 and 10 are relationship diagrams between an iron pipe material and a cutting command by the conventional continuous cutting device. 1 is a material to be cut (iron pipe material), 2 is a shear device, 4 is a cutting command, 5 is a cutting length setting unit, 6 is set cutting length data,
Reference numeral 7 is a pulse generator, 9 is a pulse train signal, 10 is a cutting command control unit, 11 is a defective portion, 12 is a sensor, 13 is a defective portion presence / absence signal, 14 is a defective portion measuring unit, and 15 is from a material tip to a defective portion tip. Of length data, 16 is the length data of the defective part. In each drawing, the same reference numerals indicate the same or corresponding parts.

Claims (3)

[Claims] 1. A material to be cut that is conveyed to a shearing device, a pulse generator that generates a pulse train signal according to the conveyance of the material to be cut, a sensor that detects a defective portion of the material to be cut, and the pulse. A defective portion measuring unit which inputs a pulse train signal from a generator and a defective portion presence / absence signal from the sensor and outputs length data from the material to be cut to the defective portion and length data of the defective portion, Each time the movement length of the material to be cut obtained from the pulse train signal becomes equal to the set cutting length set by the cutting length setting unit, a cutting command is output to the shear device and the cutting portion from the defective portion measuring unit is output. When the length data from the tip of the cutting material to the defective portion and the length data of the defective portion are input and the length of the defective portion is longer than the maximum cutting length of the shear device, the material to be cut is Stopping the feed, continuous cutting device when shorter is provided with a cutting instruction control unit for outputting a disconnection command to the shear apparatus by changing the cutting length so as not to cut in defective portion while continuing the conveyance. 2. The continuous cutting device according to claim 1, wherein the cutting command control unit outputs a cutting command on the leading end side and the trailing end side thereof in order to remove the defective portion. . 3. The continuous cutting device according to claim 1, wherein the cutting command control unit outputs the cutting command only on the rear end side in order to remove the defective portion.