JPH1043932A - Method for detecting adhesion of cut end material in continuous cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and precisely detect the adhesion of a cut end material to a stopper by measuring the traveling distance after cut of a preceding material to be cut, and comparing this traveling distance with the set cutting length determined by the distance between a cut shear and a stopper. SOLUTION: Since the rear end of a preceding lengthy material 1a and the top end of the following lengthy material 1b are in contact state by the action of a carrying roller 2, a set length L is equal to the distance between a stopper 4 and a cut shear 5. Thus, the traveling distance Lx after cut of the preceding lengthy material is compared with a set cutting length L, whereby the adhesion of a cut end material 7 can be detected. When the cut end material 7 is adhered, the adhered cut end material 7 is removed, and the cutting is performed after the top end of the following lengthy material 1b is brought into contact with the stopper 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to continuous cutting in which a plurality of long members such as steel bars are continuously run in the longitudinal direction, and are abutted against a stopper to cut one after another to a predetermined length. The present invention relates to a method for detecting sticking of a cut piece to a stopper, which causes cutting and causes a reduction in product yield.

[0002]

2. Description of the Related Art For example, in the field of secondary processing of steel, when a long steel material such as a wire rod or a bar steel is subjected to secondary processing to produce a product, a plurality of these long steel materials are continuously formed into a continuous cutting machine. Feeding, the tip is brought into contact with a stopper, a cut shear is operated, and one after another is cut into a single length steel material having a predetermined length. In general, products obtained from this single-piece steel material are often mass-produced, and when cutting a long-length steel material to obtain a single-piece steel material, in order to reduce the amount of cut-off and improve the yield, It is often measured to a fixed length of a multiple of the length plus an alpha.

[0003] However, due to a cutting error, bending, deformation at the time of cutting, or the like, a cut piece is often generated after the final cut, and the cut piece remains between the tip of the subsequent steel material and the stopper and remains as it is. When cutting the subsequent long steel material, a material shorter than the predetermined length by the length of the offcuts will be obtained,
Bad steel material occurs.

[0004] As a conventionally known continuous cutting machine, for example, as shown in Fig. 3 (a), a preceding long steel material 1a to be cut is continuously fed by a conveying roller 2 and fed by a feed roller. 3 automatically feeds the sheet every set cutting length, the leading end thereof is brought into contact with the stopper 4, and the cutting steel 5 of the continuous cutting machine cuts the preceding long steel material 1a to a predetermined length (to the cutting position by the stopper and the cutting shear). (Equivalent to a distance).

At this time, in order to prevent a decrease in yield,
The tip position of the long steel material 1b succeeding the preceding long steel material 1a is detected by the detector 6, and the tracking process is performed on the front end of the steel material 1b based on the distance to the cutting position by the cut shear 5 and the cutting length. When the leading end position of the long steel material arrives at the cut shear 5, the cut end material of the preceding long steel material is dropped and removed.

However, in this case, as shown in FIG. 3B, depending on the cutting position, a thin cut piece 7 may be generated and stick to the stopper 4, and the cutting is continued without removing the cut piece. Inevitably, single-sided steel materials with dimensional defects are inevitable, and these are temporarily joined together with the cut scraps as defective single-sided steel materials and may flow as products as they are. Inevitably occurred.

As a countermeasure, a method of detecting and removing the sticking (residual) state of the cut piece 7 by installing an ITV sensor or the like in the vicinity of the cut shear and the stopper can be considered, but here, dust, water, oil, etc. In an environment where there is a lot of scattering and the like, even if an ITV sensor or the like is installed, troubles are apt to occur, which is not practical. As described above, in the related art, there has been no satisfactory method for detecting the sticking of the cut piece.

[0008]

SUMMARY OF THE INVENTION According to the present invention, when a long steel material such as a bar steel is continuously run in the longitudinal direction and is abutted against a stopper to cut one after another to a predetermined length,
It is an object of the present invention to provide a method of detecting the sticking of the cut material of the continuous cutting machine, which can easily and accurately detect the sticking of the cut material to the stopper without causing the above-mentioned disadvantages.

[0009]

SUMMARY OF THE INVENTION According to the present invention, a plurality of long members are continuously run, the ends of which are brought into contact with a stopper, and the stopper is separated from the stopper by a distance corresponding to a predetermined cutting length. In the continuous cutting of the long material to obtain a single length of a predetermined length by cutting the long material one after another with a cut shear provided at a position provided at a position of the rear end of the preceding long material and the front end of the subsequent long material. Detect the seam position, measure the length of the preceding long material, determine the number of cuts, the amount of cut off material, measure the traveling distance after cutting the preceding workpiece, and determine the traveling distance between the cut shear and the stopper. Is a method for detecting the sticking of the cut piece in the continuous cutting machine, which detects the presence or absence of sticking of the cut piece by comparing with a set cutting length determined by the distance of the cut piece.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, the sticking of the scraps to the stopper can be indirectly detected by measuring the traveling distance of the long material. Without this, the sticking can be detected easily and accurately, and it can be directly connected to the removal of the cut off material immediately.

For example, when the feeding speed of the steel material is 10 m / mi
n, In the case of a continuous cutting line with a cutting length of 150 mm, the exclusion amount due to insufficient dimensions can be reduced, and the product yield can be improved by 2-3%. In addition, since the cut off material can be detected and excluded each time, it is possible to prevent the outflow of cut off material to the lower process, reduce the burden on process control and quality control, improve cutting productivity, and reduce costs. Become.

The present invention will be described below with reference to FIG. In the continuous cutting machine to which the present invention is applied, a plurality of long materials 1a and 1b are transported by a transport roller 2 to a feed roller 3, and the feed roller feeds the elongated material until the distal end comes into contact with a stopper. Stopper 4
Then, the cut shear 5 provided at a position away from the stopper by a distance corresponding to a predetermined cut length in front of the stopper is actuated to cut to the set cut length L.

In this process, since the rear end of the preceding elongated member 1a and the leading end of the succeeding elongated member 1b are in contact with each other by the action of the transport roller 2, the set cutting length L is determined by the stopper 4 and the cut shear 5 Equal to the distance Lo between them. Therefore, by comparing the travel distance Lx after cutting of the preceding long material with the set cutting length L, it is possible to detect the presence or absence of sticking of the cut piece 7. For example, up to the last cutting of the preceding long material 1a, it is cut to the set cutting length L, and the traveling distance Lx becomes equal to this L.

However, the cut end piece 7 is generated by the final cutting of the preceding long piece 1a, and the running distance Lx of the succeeding long piece 1b changes. For example, when the traveling distance Lx of the succeeding long material 1b after the last cutting of the preceding long material 1a is equal to L, it indicates that the cut off material 7 is excluded.

However, when the traveling distance Lx of the succeeding elongated member 1b after the final cutting of the preceding elongated member 1a is smaller than the set cutting length L, as shown in FIG. This indicates that there is sticking, and if the cutting is performed as it is, a defective single-piece material having a length Ls shorter than the set cutting length L by the length (thickness) of the cut piece 7 is obtained. When such a state is detected, the end of the succeeding elongated member 1b is cut off after the tip of the elongated member 1b is brought into contact with the stopper 4, excluding the stuck cutting member 7.

At the time when the cutting of the preceding long material 1a is completed and the cutting of the subsequent long material 1b is started, the running distance measurement is switched to the succeeding long material 1c, and the tip position thereof is detected. Then, the traveling distance Lx of the succeeding long member 1c after the cutting of the preceding long member 1b is measured, and this traveling distance Lx is compared with the cutting length L, thereby detecting the presence or absence of sticking of the cut piece 7. I do.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. This embodiment is applied to a continuous cutting machine for cutting a long bar. 1 in the figure
a, 1b, 1c are long bars (long materials) measured to a fixed length
Is transported to the feed roller 3 by the transport roller 2 and fed by the rotation of the feed roller until the tip comes into contact with the stopper 4, and the cut shear 5 of the continuous cutting machine is operated after a certain time after the tip is brought into contact with the stopper. And cut it.

The single bar obtained by cutting is pushed with pusher 8
, And is placed on the conveyor 10 via the chute 9 and transported to the next step. Such a cutting operation is repeated to cut each continuously supplied long bar into a plurality of single bars. When the last cut is performed on each long bar and the cut piece 7 that does not reach the set cut length adheres, the cut piece is put into a pit 11 arranged below the cut shear 5. Drop and scrap.

However, when cutting, the preceding long bar 1a
Is in a state pressed by the succeeding long steel bar 1b, and the cut off material 7 generated after cutting has a shape, size,
Depending on the cutting situation, it does not fall, but sticks to the tip of the subsequent long bar 1b, feeds the subsequent long bar with the feed roller 3 and abuts the stopper 4 on the tip. 1b and the stopper 4 and when cut in this state, as described with reference to FIG. ) It becomes a defective single bar with a length of Lx shorter by x minutes.

Therefore, in the present invention, in order to prevent the occurrence of such defective products, the presence or absence of sticking of the cut piece 7 is detected. Then, the long bar 1b is removed by the removing device 12 disposed close to the stopper 4, and the leading end of the subsequent long bar 1b is reliably brought into contact with the stopper 4 and cut.

For this purpose, in the present invention, on the hardware side, a seam detector 6 is provided near the seam 13 between the rear end of the preceding long bar 1a and the front end of the subsequent long bar 1b at the cutting start position. In addition, a moving distance meter 14 for measuring a traveling distance is provided near the continuous cutting machine every time the preceding long bar 1a is cut, and the seam detector 6 and the moving distance meter 1 are arranged.
The main feature is that an arithmetic and control unit 14 that determines the presence or absence of sticking of the cut piece 7 based on the information from 3 is provided. The outline of these functions will be described below.

The seam detector 6 is conventionally used. The seam detector 6 abuts the front end of the preceding long bar 1a against the stopper 4 to start cutting, and the rear end and the subsequent length of the preceding long bar 1a. The joint 13 with the tip of the bar steel 1b is detected, and the detected information is input to the arithmetic and control unit 15. In this arithmetic and control unit, the length of the preceding long steel bar 1a is calculated based on the seam detection information. In this arithmetic and control unit, a set cutting length is set, and while calculating the number of cuts and the length (thickness) of the cut piece 7 according to the length of the preceding long bar 1a,
The feed amount by the feed roller 3 is calculated, and the continuous cutting machine (cut shear 5) is driven via the drive control device 16a.
To control the cutting operation.

The travel distance meter 14 is configured to detect the traveling speed of a long bar, for example, with a laser and to integrate the result to obtain the traveling distance. The tip of the feed roller 3 to the stopper 4 by the feed roller 3 after each cutting is obtained. The feed amount and the travel distance are measured, and the measurement information is input to the arithmetic control unit 15 to calculate the travel distance, and the travel distance is compared with the set cutting length. Until the last cutting of the preceding long bar 1a, the respective cutting lengths and the traveling distances are almost the same, so that the length (thickness) of the cut off material after the last cutting in this long bar can be calculated.

Therefore, when the cutting of the preceding long bar 1a is completed, the succeeding long bar 1b is fed by the feed roller 3, and the tip of the bar 1b is brought into contact with the stopper 4, there is no sticking of the cut piece 7 at the tip. In the case, subsequent long bar 1b
The traveling distance until the tip of the
It is equivalent to the set cutting length.

However, when the tip of the succeeding long bar 1b is brought into contact with the stopper 4, if the cut piece 7 is attached to the tip, the moving distance is smaller than the set cutting length. Become.

Therefore, by comparing the moving distance after cutting with the set cutting length, it is possible to detect whether or not the cut end piece 7 sticks to the tip of the succeeding long steel bar 1b. When it is detected that the cut piece 7 is stuck, the removing device 12 arranged near the stopper 4 is operated to remove the cut piece 7 between the tip of the subsequent long bar 1 b and the stopper 4. I do.

Whether or not the cut off piece 7 has been removed can be confirmed by the presence or absence (running distance) of running of the subsequent long bar 1b after the operation of the removing device 12. When the cut off material 7 is removed and the tip of the subsequent long bar 1b comes into contact with the stopper 4, cutting is performed in the same manner as described above. In this way, it is possible to continuously supply a plurality of long steel bars, for example, 1a, 1b, 1c, to a continuous cutting machine and cut them substantially continuously to obtain a large number of single steel bars 6 having a predetermined cutting length. it can.

As described above, according to the present invention, the sticking of the cut piece 7 can be accurately detected, the cut piece can be reliably removed, and the subsequent long bar can be cut. It is possible to prevent defective cutting due to sticking of the cut off material, and to greatly improve the yield.

In the above embodiment, the long bar is to be cut. However, the cut object is not limited to the long bar, and other long steel or long steel may be cut. The present invention is also applicable to long metal materials other than the above and non-metal long materials. In addition, for the continuous cutting machine to constitute the present invention, a transport roller, a feed roller, a stopper, a seam detector, a moving distance meter, an arithmetic and control unit, a pusher, a structure of a removal device and the like, an operation mechanism, a control system, and the like, Depending on the cutting target, the size, the cutting conditions, and the like, other known means may be used as long as the above claims are satisfied.

[0030]

[Experimental example] Diameter 32mm, length 5000mm (allowable range ± 1m
m) into a continuous cutting equipment having a basic configuration as shown in FIG.
In the case of obtaining a large number of single bar bars with a length of 150 mm (tolerance range ± 1 mm) for manufacturing automotive parts by cutting continuously by cutting at a rate of presence or absence of sticking of the cut off material, While checking the detection accuracy visually,
The evaluation of the effect was performed by calculating the incidence of cut off materials and defective cuts, that is, the yield of non-defective products.

The result will be described in comparison with the case of the above-mentioned conventional example in which the detection of the cut off material is not performed. In the case of the present invention, 100% of the cut off material generated in each long bar can be dropped and removed, and 95 non-defective products cut to a length within an allowable range are obtained.
It was in the range of 97%. On the other hand, in the case of the conventional example, the cut off material generated in each long bar is dropped and removed by 70 to 80%, and 88 non-defective products cut to a length within an allowable range are obtained. , 85-90%.

[0032]

According to the present invention, the sticking of the scraps to the stopper can be indirectly detected by measuring the moving distance of the long steel material, so that there is no fear of occurrence of the trouble as described above. The sticking can be detected easily and accurately, and it can be directly connected to the removal of the offcuts immediately. For example, the feeding speed of long steel material is 10m / m
In the case of a continuous cutting line with a cutting length of 150 mm, the exclusion amount due to insufficient dimensions can be reduced, and the product yield can be improved by about 7 to 10%. In addition, since the cut off material can be detected and excluded each time, it is possible to prevent the outflow of cut off material to the lower process, reduce the burden on process control and quality control, improve cutting productivity, and reduce costs. Become.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic side view illustrating the concept of detecting a cut off piece in the present invention, and FIG. 1 (a) is an explanatory view showing a relationship between a traveling distance of a long piece and a cutting length when sticking of the cut off piece does not occur; (B)
The figure is an explanatory view of the relationship between the traveling distance of the long material and the cutting length when there is sticking of the cut off material.

2A is a schematic side view showing an example of a continuous cutting machine for carrying out the present invention, and FIG. 2B is a schematic plan view of FIG.

3A is a schematic side view illustrating an example of a conventional continuous cutting machine, and FIG. 3B is a schematic side view illustrating a state where a cut piece is stuck in the conventional example of a continuous cutting machine.

[Explanation of symbols]

 1a Leading long material (bar, steel) 1b, 1c Following long material (bar, steel) 2 Conveyance roller 3 Feed roller 4 Stopper 5 Cut shear 6 Seam detector 7 Cutting scrap 8 Pusher 9 Chute 10 Conveyor 11 Pit 12 Removal device 13 Seam 14 Moving distance meter 15 Operation device 16a to 15d Drive control device

Claims (1)

[Claims] 1. A cutting shear provided at a position separated from the stopper by a distance corresponding to a predetermined cutting length, by continuously running a plurality of long members and bringing the ends thereof into contact with a stopper. Upon continuous cutting of the long material to obtain a single length material of a predetermined length by cutting the long material one after another, the seam position of the rear end of the preceding long material and the leading end of the succeeding long material is detected and the leading length is detected. Measure the length of the long material, calculate the number of cuts, the amount of cut off material and measure the travel distance after cutting the preceding long material, and set this travel distance to the set cutting length determined by the distance between the cut shear and the stopper. A method for detecting sticking of a cut piece in a continuous cutting machine, wherein the presence or absence of sticking of the cut piece is detected by comparing.