JP3334793B2 - Method and apparatus for tracking welded joint of wire rod - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for welding front and rear ends,
The present invention relates to a tracking method applied to a line in which a wire having a welded joint is formed in a loop and conveyed by a loop conveyor, and the welded joint is cut on the exit side of the loop conveyor.

[0002]

2. Description of the Related Art A wire is finally produced through various processing steps such as heat treatment and plating. At the time of this treatment, the wire is formed into a loop shape due to restrictions on a line length and the like, and a loop conveyor is used. It is common to perform processing while transporting. FIG. 2 shows an example of the processing line, a continuous annealing /
The equipment arrangement of a plating line (hereinafter also referred to as a loop process plating line) is shown.

[0003] In FIG. 2, a wire rod 1 placed in a coil shape on a supply stand 2 is drawn by an intermediate drawing machine group 3.
It is formed in a loop by the loop forming device 4. The wire rod 11 formed in a loop shape is loaded on the loop conveyor 10 and transported. Here, the wire 1 is the supply stand 2
The front and rear ends are welded by a welding machine 15 installed on the delivery side to form one continuous long wire.

[0004] Various processing equipment is provided on the loop conveyor 10 as necessary. In the example of FIG. 2, an annealing treatment is performed in a continuous annealing furnace (CAL) 6 and an acid installed as needed. After passing through the washing / degreasing facility 6a, it passes through the plating facility 7. Then, the sheet is appropriately cut by an output side cutting device 8 installed on the output side of the loop conveyor 10 and wound up by an output side winding device 9.

[0005] Here, the wire 1 is processed as a continuous long material by welding the front and rear ends thereof to form a weld seam, and the exit side cutting device cuts the weld seam to recover the original material. It is generally identified as a wire and wound up. Conventionally, in order to cut this welded joint with the exit cut device 8, immortal ink is applied to the welded joint of the wire 1 and the operator visually checks the welded joint in the loop forming device 4, and removes the wire. It was wound around the welded joint of the wire rod and marked or used as a mark for cutting.

Here, in the case of treatments such as annealing and plating,
In many cases, immortal ink is removed and it is often difficult to visually detect the ink on the exit side of the loop conveyor. In such a case, wire marking is performed. Then, after a lapse of time that had been considered in advance, they were visually inspected on the exit side to find and cut the marking location.

[0007] The wire coil wound by the delivery side winding device 9 in this manner is sent to the finishing wire rewinding line in the next step. Further, instead of cutting at the exit side of the loop conveyor as described above, the welding seam may be cut and removed in advance on the loop forming apparatus side on the entrance side of the loop conveyor.

[0008]

However, it is necessary to temporarily stop the operation of the line in order to perform the marking with a wire or to perform the cutting in advance on the loop forming apparatus side, which lowers the line operation rate. Let it be a problem. SUMMARY OF THE INVENTION The present invention provides a tracking method and a tracking apparatus which enable a welding seam to be accurately cut by a delivery cutting device at a delivery side of a loop conveyor without stopping a line.

[0009]

According to the present invention, the total number of wire rod loops loaded on a loop conveyor can be calculated from the conveyor length and the loop pitch. , The loop conveyor speed and the loop circumference, that is, the loop diameter, which is obtained by focusing on the fact that these values can be detected or calculated based on line equipment specifications and operating conditions. It was done.

That is, according to the present invention, the wire rod formed by welding the front and rear ends to form a welded seam and being continuous is formed into a continuous loop by a loop forming apparatus, and after being conveyed on the loop conveyor, the exit side of the loop conveyor exit side. A method for tracking a welded joint of a wire rod in a line in which the welded joint is cut by a cutting device and wound again into each coil, wherein a detection of a welded joint detector disposed immediately before the loop forming device is performed. Using the signal as a trigger, a predetermined time required for the detected welded seam to pass through the loop forming device, the number of loops calculated from a signal of the loop forming rotation detector of the loop forming device, the conveying speed (v _1), the conveying speed of the loop conveyor (v _2), loop pitch calculated from the loop diameter of the loop formed by the loop forming device (D) ( ), The elapsed time obtained by integrating the loop conveyor passage time of the welded seam calculated from the known loop conveyor length and the predetermined time required for the passage from the loop conveyor exit side to the exit side cutting device has elapsed. At this point, the above-mentioned problem is solved by a method of tracking a welded joint of a wire rod that operates the delivery side cutting device to cut the welded joint.

Further, the front and rear ends are welded to form a welded seam, and the continuous wire is formed into a continuous loop by a loop forming device. After being conveyed on the loop conveyor, the wire is cut by the output side cutting device on the output side of the loop conveyor. What is claimed is: 1. A tracking device for a welded joint of a wire in a line in which a welded joint is cut and wound again on each coil, wherein a welded joint detector installed immediately before a loop forming device and a loop of the loop forming device are provided. a loop forming speed calculator for calculating the number of loops formed from the signals of the formation rotation detector, the conveying speed of the wire rod (v _1), as input conveying speed of the loop conveyor (v _2), formed by the loop forming device loop And a loop pitch calculator for calculating a loop pitch using the loop diameter (D) of the loop joint, and a joint required for the welded joint detected by the welded joint detector to pass through the loop forming device. The delay time setting unit that sets the sum of the predetermined time and the predetermined time required for the passage of the welding seam from the exit side of the loop conveyor to the exit side cutting device, and the signal of the welding seam detector As a trigger input, after the set time of the input delay time setter has elapsed, further, based on the input values from the loop formation number calculator and the loop pitch calculator, the welding joint calculated from the known loop conveyor length is used. The above-mentioned problem has been solved by a tracking device for a welding splice portion, which comprises a control device for outputting a cut command to the output side cutting device when the loop conveyor passing time has elapsed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, referring to FIG. 4, a process of drawing a wire 1 by a final intermediate drawing machine 3a and forming a wire loop by a loop forming device 4 will be described. The wire 1 is wound around the shuttle 14 via the die 30. The V pulley 33 of the intermediate wire drawing machine 3a is connected to a V pulley 34 by a belt 32. The V pulley 34 is driven by a motor 35, and the shuttle 14 rotates.

The wire 1 wound around the shuttle 14 is sent to the loop forming device 4 via the control roller 31. Here, the welded joint of the wire is detected by the welded joint detector 12 installed immediately before the loop forming device 4. As the welded joint detector, for example, a device of a penetration type vortex type or the like is used.

In the loop forming apparatus 4, the wire 1 is once wound around the upper hook 14a via the inlet vertical roller straightener 41 and the upper hook vertical roller straightener 42, and then the lower hook vertical roller straightener 43, It is wound around the lower hook 14b through the lower hook horizontal roller straightener 44. Then, the sheet is paid out as a loop by the layoff roller 45 via the payout guide 46.

Here, the V pulley 49 driven by the motor 50
And a V pulley 48 are connected by a belt 47, and an upper shuttle vertical roller straightener 42, a lower shuttle vertical roller straightener 43, and a lower shuttle horizontal roller straightener 44 rotate. This rotation is detected by the loop formation rotation detector 51. FIG. 3 (a)
As shown in (1), the wire rod 11 discharged as a loop by the loop forming device 4 is loaded and conveyed on a loop conveyor 10 and passes through, for example, a continuous annealing furnace 6 and a plating facility 7 to perform necessary processing. Done.

Here, as shown in FIG. 3B, the wire loop 11 loaded on the loop conveyor 10 becomes a loop having a diameter D determined by the diameter of the shuttle of the loop forming apparatus 4, and the loop pitch P Is obtained by the following equation (1). P = v ₂ × (π × D / v ₁ ) (1) P: loop pitch (m) D: loop diameter (m) v ₁ : wire drawing speed (m / min) v ₂ : Loop conveyor speed (m / min) Since the length of the loop conveyor is known and the loop conveyor speed can be easily known, the loop is formed based on the pitch P of the loop of the formula (1). Accurately calculate the dwell time on the loop conveyor from the time the wire rod loop is loaded on the loop conveyor to the time it is discharged on the exit side by counting up the number of loops each time the loop is dispensed by the device Can be.

Next, a system constituting the tracking system of the present invention will be described with reference to the block diagram of FIG. The wire rod 1 exiting the wire drawing machine not shown in FIG. 1 passes through the weld joint detector 12 and enters the loop forming device 4, is formed into a loop shape, and is discharged onto the loop conveyor 10.
The wire drawing speed v ₁ of this wire is detected by the speed detector 110 and input to the loop pitch calculator 130. However, the wire drawing speed v ₁ may be input to the loop pitch calculator 130 as a speed set value instead of being detected by the speed detector.

When the welded joint passes through the welded joint detector 12, the passage is detected and input to the control device 150 as a trigger signal. The signal of the loop forming rotation detector 51 provided in the loop forming device 4 is output to the loop forming number calculator 10.
It is input to 0, and the number of loop formations is calculated and input to the control device 150.

The loop formed by the loop forming device 4 to have a predetermined diameter D is paid out and loaded onto the loop conveyor 10. Loaded wire loop 11
Is transported on the loop conveyor at the loop conveyor transport speed v ₂ , and necessary processing is performed in the loop wire processing equipment 13. The loop wire processing equipment 13 can be any equipment such as a continuous annealing furnace and a plating equipment.

The transport speed v ₂ of the loop conveyor is taken into the speed detector 120 and inputted to the loop pitch calculator 130. Here, the transfer speed v ₂ of the loop conveyor may be input to the loop pitch calculator 130 as a speed set value, instead of being detected by the speed detector. Also,
The transport speed v ₂ of the loop conveyor is also input to the control device 150 in parallel.

In the loop pitch calculator 130,
The pitch P of the loop is calculated based on the equation (1), and the calculated pitch is input to the control device 150. Control device
A delay time setting unit 140 is connected to 150, and a time required for the welded joint to pass through the welded joint detector 12 and pay out the loop forming device 4, and a time required for the loop conveyor 10 to exit from the exit. A time obtained by adding the time required to the cutting device 8 is set in advance as a delay time.

In the control device 150, tracking is started in response to a trigger signal from the weld seam detector 12, and the delay time set by the delay time setting device 140 and the passage of the weld seam on the loop conveyor. After a lapse of the accumulated time, a cutting command is output to the delivery-side cutting device 8 to cut the welded joint. Then, the cut wire rod loop is wound up by the output side winding device 9 as a single coil.

Here, in the above description of the tracking method, an example has been described in which tracking is performed with the passage of time starting from a trigger signal. However, the present invention is not limited to this. It is needless to say that the tracking may be performed by converting the distance from the position of the welded joint detector to the output side cutting device.

[0024]

An embodiment in which the present invention is applied to the loop process plating line described in FIG. 2 will be described as an embodiment. A wire rod of, for example, 5.5 mm in diameter supplied from the supply stand 2 is sent to the intermediate drawing machine group 3 and drawn to a wire diameter of, for example, 2.8 mm in diameter.

Here, for continuous processing, a welding machine 15 is installed on the supply stand 2 exit side, and the front and rear ends of the wire are welded and connected to perform continuous processing. The line speed (drawing speed) at the exit side of the intermediate drawing machine group 3 is 700 m / min. Between the exit side of the intermediate drawing machine group 3 and the loop forming device 4, a welded joint detector not shown in FIG.
12 (see FIG. 4) are installed to detect the welded joint.

In the loop forming apparatus 4, the diameter D is 700 mm.
Loop is formed, and the wire rod 11
Will be loaded as The wire rod loop 11 loaded on the loop conveyor 10 is transported at a transport speed of 6 m / min. Then, CAL and plating are performed. The total length of the loop conveyor in FIG. 2 is 85 m. The length of one wire processed by the line of FIG. 2 is 21 km and the weight is about 1 t. Such wires are joined by welding the front and rear ends, and are sequentially processed at intervals of about 30 minutes.

Conventionally, the marking operation was performed by stopping the line for several minutes every processing, that is, about every 30 minutes, but by applying the tracking of the present invention,
There is no need to stop the line, and continuous line processing by automatic tracking has become possible.

[0028]

According to the present invention, automatic tracking of a welded joint is realized. As a result, the work of stopping the line is not required, and the productivity can be improved.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a tracking method according to the present invention.

FIG. 2 is a facility layout diagram showing an example of a line to which the present invention is applied.

FIG. 3 is an explanatory diagram of a loop wire in a line to which the present invention is applied, (a) is a side view of a line arrangement,
(B) is a partial plan view.

FIG. 4 is a schematic diagram illustrating the arrangement of a final intermediate wire drawing machine and a loop forming device.

[Explanation of symbols]

Reference Signs List 1 wire rod 2 supply stand 3 intermediate drawing machine group 3a intermediate drawing machine (single unit) 4 loop forming device 5 marking execution position 6 continuous annealing furnace (CAL) 6a pickling and degreasing equipment 7 plating equipment 8 delivery side cutting equipment 9 output Side take-up device 10 Loop conveyor 11 Wire loop 12 Weld joint detector 13 Loop wire processing equipment 14 Kettle 14a Upper kettle 14b Lower kettle 15 Welding machine 30 Dies 31 Control roller 32 Belt 33 V pulley 34 V pulley 35 Motor 41 Inlet vertical Roller straightener 42 Upper hook vertical roller straightener 43 Lower hook vertical roller straightener 44 Lower hook horizontal roller straightener 45 Layoff roller 46 Discharge guide 47 Belt 48 V pulley 49 V pulley 50 Motor 51 Loop formation rotation detector 100 Number of loops formed calculator 110 speed detector (v ₁₎ 120 speed detector (v ₂₎ 130-loop pitch (P) calculation unit 140 delay Thailand Setter 150 controller

──────────────────────────────────────────────────の Continuation of the front page (51) Int.Cl. ⁷ identification code FI B21F 11/00 B21F 11/00 E 15/08 15/08 (58) Field surveyed (Int.Cl. ⁷ , DB name) B21C 47/26 B21B 41/00 B21C 47/24 B65H 59/38

Claims (2)

(57) [Claims] 1. A continuous wire rod formed by welding front and rear ends to form a weld seam and forming a continuous seam by a loop forming apparatus.
A method for tracking a welding joint of a wire rod in a line which cuts the welding joint with an exit cut device on an exit side of a loop conveyor after being conveyed on a loop conveyor and winds the coil again on each coil. Using the detection signal of the welded joint detector located immediately before the forming device as a trigger,
The predetermined time required for the detected welded seam to pass through the loop forming device, the number of loops calculated from the signal of the loop forming rotation detector of the loop forming device, and the wire transport speed (v ₁ ), The loop conveyor speed (v ₂ ), and the loop pitch (P) calculated from the loop diameter (D) of the loop formed by the loop forming apparatus. When the time obtained by integrating the loop conveyor passage time of the section and the predetermined time required for passage from the loop conveyor exit side to the exit side cutting device has elapsed, the exit side cutting device is operated to weld the welded joint. Tracking method of the welded joint of the wire to be cut. 2. A continuous wire rod formed by welding the front and rear ends to form a welded seam and forming a continuous loop with a loop forming apparatus.
A tracking device for a welding joint of a wire rod in a line where the welding joint is cut by an exit side cutting device on the exit side of the loop conveyor after being conveyed on the loop conveyor, and is again wound around each coil. A welded joint detector installed immediately before the apparatus, a loop formation number calculator for calculating the number of loop formations from a signal of a loop formation rotation detector of the loop forming apparatus, a wire transport speed (v ₁ ), and a loop conveyor the conveying speed (v ₂₎ as input, and loop pitch calculator for calculating a loop pitch with a loop diameter of the loop, formed by the loop forming device 1 (D), causing the welding joints is detected by welded joints detector The predetermined time required to finish passing through the loop forming device and the predetermined time required to pass through the welding seam from the exit side of the loop conveyor to the exit side cutting device. A delay time setting device for setting the sum of the time during which the delay time is set, and a signal of the welded seam detector is used as a trigger input. Based on the input value from the loop pitch calculator, at the time when the loop conveyor passage time of the welded seam calculated from the known loop conveyor length has elapsed, a control device that outputs a cut command to the output side cutting device, A tracking device for welding seams.