JPS6239849Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention involves rolling a coil formed by a laying cone onto a cooling conveyor, and dividing the coil into two by a coil converging device at the end of a number of conveyors each having a different speed. The present invention relates to a wire rod splitting control device for use in wire rod hot rolling equipment.

FIG. 1 is a block diagram showing an example of a conventional wire cutting control device. In Figure 1, 1
2 is a driving electric motor for driving the cooling conveyor 1, and 3 is a pulse transmitter attached to the electric motor 2. and 4 is a coil focusing device,
5 is a coil detector provided on the coil focusing device 4;
6 is a cutting machine provided within the coil focusing device 4.
Further, 7 is a counter which is supplied with the pulse output of the pulse generator 3 and is activated and starts a counting operation when the coil detector 5 detects a coil.
9 is a setting device for presetting the number of pulses to be counted by the counter 3 until half of the total length of the coil falls onto the coil converging device 4, and 9 is a laying cone for winding the wire onto the cooling conveyor.

The operation of such a control device for cutting wire into two parts is as follows. That is, when forming a wire into a coil shape using the laying cone 9 for forming the wire into a helical coil shape and winding it down onto the cooling conveyor 1, the circumferential speed of the lower end of the laying cone 9 is adjusted to a predetermined speed. Wobbling control is performed to periodically vary the coil diameter, thereby reducing the coil stack height.

Due to this wobbling control, the diameter of the coil on the cooling conveyor 1 changes, and at the same time, the interval between the coils on the conveyor changes. Further, the speed of the wire entering the laying cone 9 is not constant, but varies depending on manual intervention or rolling control factors. A variation in wire speed will have the same effect as wobbling control. Here, the pulse value set by the setting device 8 in FIG. 1 corresponds to the amount by which the cooling conveyor 1 travels until it drops a wire of half the total length into the coil concentrator. However, if there are variations in the coil diameter and coil spacing of the coils on the cooling conveyor 1, this will reduce the accuracy of the length of the two-part cut.

The present invention has been developed in view of the above-mentioned circumstances, and an object of the present invention is to provide a wire rod two-part cutting control device that can accurately perform two-part cutting.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the block diagram shown in FIG. In the figure, 11 is the first cooling conveyor, 12 is the electric motor for driving the first cooling conveyor, 13 is a pulse transmitter attached to the electric motor 12, 14 is the second cooling conveyor, 15 is the electric motor for driving the second cooling conveyor, and 16 is the electric motor for driving the second cooling conveyor. This is a pulse transmitter attached to the electric motor 15. 17 is a third cooling conveyor, 18 is a motor for driving the third cooling conveyor, 19 is a pulse generator attached to the motor 18, and 20 is a coil focusing device. Furthermore, 21 is a cutting machine, 22 is a wire rod finishing rolling machine, 23 is a motor for driving the wire rod finishing rolling machine, and 24 is a pulse transmitter attached to the electric motor 23. 25 more
is a laying cone for winding down the wire, and 26 is a hot mass detector attached to the input side of the laying cone 25. The first counter 27 inputs the pulse output of the pulse transmitter 24, starts counting from the time when the tip of the wire detected by the hot lump detector 26 falls onto the conveyor, and transfers the wire rod finishing mill 22 to the cooling conveyor. Count the length of the wire being sent out to the side. The first counter 27 stops counting when its count value reaches a set value P _h0 of a setting device 28 that sets the position at which the wire is divided into two, as shown in FIG. 3a.
As a result, it is possible to know the point in time from when the tip of the wire rod falls onto the cooling conveyor to the predetermined bisecting point position, and when the wire rod has been completely fed, and at this point, the laying cone 26 starts the first cooling process. This means that the position of the bifurcation point of the wire rolled down onto the conveyor 11 has reached the top of the cooling conveyor 11.
Further, a second counter 29 is provided to count the output pulses of the pulse generator 13 in order to obtain the travel distance of the first cooling conveyor 11. As shown in FIG. 3b, this second counter 29 starts counting at the same time as the first counter 27, and when the first counter 27 detects the position where the wire is divided into two, at that point The count of counter 29 and other P
Store _h1 in memory. If the count value of the second counter 29 required to travel the entire length of the cooling conveyor 1 is P _l1 , the count value (P _l1 + P _h2 )
indicates the point in time when the position at which the wire is divided into two has reached the entrance side of the cooling conveyor 14. So cooling conveyor 1
A third counter 30 is provided to count the output pulses of the pulse generator 16 in order to obtain a travel distance of 4. The third counter 30 starts counting when the tip of the wire reaches the entrance side of the second cooling conveyor 14, ie, when the counter 29 counts _Pl1 , as shown in FIG. 3c. Then, when the second counter 29 counts (P _l1 +P _h1 ), the count value P _h2 of the third counter 30 is stored in the memory. Here, if the count value of the third counter 30 required for the coil to travel the entire length of the second cooling conveyor 14 is P _l2 , then (P _l2 +P _h
2 ) is the point in time when the wire rod splitting position reaches the entrance side of the third cooling conveyor 17. Third cooling conveyor 1
A fourth counter 31 is provided to count the pulse output of the pulse transmitter 19 in order to obtain a traveling distance of 7. The fourth counter 31 starts when the tip of the wire reaches the entrance side of the third cooling conveyor 17, as shown in FIG. 3d. Then, when the third counter 30 counts (P _l2 +P _h2 ), the value P _h3 of the fourth counter 31 is stored in memory,
When the count value reaches (P _l3 + P _h3 ), that is,
When the wire rod splitting position reaches the end of the cooling conveyor, a cutting command is issued to the cutter 21. This makes it possible to cut the wire into two pieces with accurate length regardless of the shape of the coil on the conveyor.

In the above explanation, it is assumed that the coils are transported by three cooling conveyor groups.
Even if the cooling conveyor group consists of a larger number of cooling conveyors, it is possible to accurately cut the cooling conveyor into two parts. Note that the number of cooling conveyors is not limited to three, and in general, i units may be provided. In addition, in the above explanation, P _l1 , P _l
2 , P _l3 are fixed values, the length of the i-th cooling conveyor is Li (mm), and the rotation diameter of the end surface of the conveyor is D _i
(mm), the gear ratio is L _i , and the output pulse per revolution of the pulse transmitter is P _i (pulse/rev), then the number of output pulses of the pulse transmitter when conveying both ends of the cooling conveyor P _ei = L _i /π. _Di. It becomes L _i (Pulse).

As explained above, according to the present invention, the position where the wire rod on the cooling conveyor that has been unwound from the laying cone is divided into two is determined from the point where the tip of the wire rod on the first cooling conveyor falls, and the supply wire is The length of the wire up to the two-way split point is determined by the point at which the wire is fed from the wire finishing rolling machine, and the position of the two-way split point on the cooling conveyor, which is known in this way, is tracked for each conveyor. , the wire splitting position can be detected from the length of the wire itself, regardless of irregularities in the diameter of the coils on the conveyor or variations in coil spacing. You can get the location. Further, according to the present invention, it is clear that accurate two-division control is possible even when the speed of the cooling conveyor changes even during conveyance by the cooling conveyor. In addition,
In the embodiment of FIG. 2, cooling conveyors 11, 14,
17. The coil focusing device 20 is not provided with a means for detecting the tip of the wire, and control is performed by tracking the tip of the wire within the control device. Therefore, it is possible to prevent the two-division accuracy from decreasing due to malfunction of the detector due to chattering or the like. In the present invention, it goes without saying that the position of the tip of the wire may be detected using a detector that does not malfunction.

As detailed above, the present invention tracks the two-parting position of the wire for each conveyor, so the two-parting position can be accurately detected and cut regardless of variations in coil diameter and coil spacing. A cutting control device can be provided.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an example of a conventional wire splitting control device, Fig. 2 is a block diagram showing an embodiment of the present invention, and Fig. 3 is a time diagram showing changes in the values of each counter in Fig. 2. It's a chat. 1, 2, 3... Cooling conveyor, 4, 20... Coil focusing device, 6, 21... Coil cutting machine, 7,
27, 29, 30, 31... Counter, 8, 28
... Setting device, 9, 25 ... Laying cone, 1
2, 15, 18, 23...Electric motor, 13, 16,
19, 24... Pulse transmitter, 22... Wire rod finishing rolling machine.

Claims (1)

[Scope of utility model registration request] A wire rod splitting control device that winds a wire rod onto a cooling conveyor via a laying cone and divides the wire rod into two parts using cutting machines installed at the ends of a plurality of cooling conveyors. , a first counter that receives the pulse output of the pulse transmitter and starts counting from the time when the tip of the wire falls onto the conveyor, and stops counting when the count value reaches a preset number of pulses; A setting device that sets a value corresponding to the wire length divided into two on the first counter, a pulse transmitter attached to the first cooling conveyor, and the pulse output of this pulse transmitter is input and counted simultaneously with the first counter. A second counter that starts counting and stops counting when the wire rod two-dividing position reaches the end of the first cooling conveyor, and i (where i=2,...
...Count the pulse transmitter attached to the th cooling conveyor (where n is the number of cooling conveyors), this pulse oscillator, and the pulse output of this pulse oscillator, and place the tip of the wire on the entrance side of the ith conveyor. and an (i+1)th counter that starts counting when the wire rod reaches the end of the i-th cooling conveyor and stops counting when the two-way dividing position of the wire reaches the end of the i-th cooling conveyor.
A control device for cutting a wire rod into two parts, characterized in that the wire rod is cut into two parts by issuing a cutting command to a cutting machine when it is detected that the wire rod two-parting position has reached the end of a cooling conveyor in the final stage.