JPS6169605A - Method of controlling operation of end shear piler - Google Patents

Abstract

PURPOSE:To stop with high accuracy a predetermined length of an object transferred on a conveyer at a predetermined spot in alignment with the center of the object controlling the transfer according to the result of counting the number of pulses corresponding to the length of the object. CONSTITUTION:When a steel plate P1 sent from a hot rolling mill and cut off by a shear is piled by an end shear piler, the number of pulses at a certain interval is counted by a half-wave pulse counter for a period of time from the detection of the leading end of the steel plate P1 passing by a point on line A-A to that of the trailing end of same passing by said point to keep the counted value. Next, the subtraction of said counted value is started by a full wave pulse counter from a time point when the leading end of the steel plate P1 passes by a stop point aligned with the center of the steel plate P1 on the line B-B, and when the counted value reaches zero, a conveyer 11 is stopped to start piling.

Description

DETAILED DESCRIPTION OF THE INVENTION The technical field of industry to which the invention pertains The present invention is suitable for metal end shear piler operation, for example, when rolling or cutting a steel plate and the length of the steel plate is not constant on a conveying roller table. The present invention relates to an operation method for accurately measuring the position of the center of gravity, transferring piles, and controlling and automating these work processes.

Issues with conventional technology At the end of the conveyance process of stainless steel sheets, other metal plates, or plastic sheets, they are sheared into a predetermined length and piled up, and then transferred or transshipped from the conveyor of this conveyance process to another conveyance process. If it is possible to stack the centers of gravity at a certain place when transporting and reliably align the centers of gravity of plates with different thicknesses, plate lengths, etc., transportation or transshipment can be ensured, and labor can be saved as well. It can improve safety and work efficiency. Although the present invention can be similarly applied to other types of plates or sheets, the stainless steel plate will be described below as a representative example.

Some stainless steel thick plates are rolled and have a tip and a rear end that are not peeled, but each plate is piled using a piler. Traditionally, these operations were performed manually. There has been a demand for rationalization of these operations, and there has been a demand for operational safety, sulfur content, and guarantees. No two steel sheets after rolling have exactly the same shape and dimensions. Piling safely and accurately is an important step in the process, and is also an important issue for transport safety and assurance.

In order to solve this series of problems of the present invention, the following matters were confirmed at a preliminary stage in improving and implementing the improvements to obtain good piling. In other words, when the steel plate is fed out in synchronization with the actual rolling operation, there is almost no inertia after the feeding stops, and there are two main types of piling methods, namely, a method that aligns the center of the steel plate. In addition, it is appropriate to promote the present invention with a method of aligning the rear end surface portions in the traveling direction of the steel plate.

Structure for achieving the object of the present invention In addition, in the rolling process, the original plate pickling method has changed from the conventional pickling method to continuous vertical pickling (PFL), resulting in three-stage rolling (3-high mill). It had to be taken into account that the work of cutting the leading and trailing ends of the rising steel plate (rolling, symbol 3HM in Figures 2A and 2B) using shears and carrying it out had increased. As a result, the process of using conventional cooling pilers,
The frequency of use of endoshear pilers has increased dramatically, replacing endoshear pilers. We have confirmed the preliminary conclusion that improvements to the Endoschar piler should be the subject of the present invention, as shown in FIG. 2B. In order to achieve the object of the present invention by solving the problems of the present invention, we provide a method for converting conventional manual piling work into an unmanned automatic process, and also a method for aligning the centers of steel plates during piling. In other words, we provide a method that detects the center of steel plates and stacks them in an aligned manner, and a method that allows the same device to detect the edges of steel plates and stack them in an aligned manner as needed. , the problem is solved by detecting the end faces of the steel plates and aligning and stacking them as necessary.

Embodiment Next, one embodiment of the present invention will be explained based on the drawings. In Figures 1A and 1B, steel plates P1 and P2 are located at location S.
The case of moving to A, SM, and SB is shown, and the example steel plate P1
is twice the length α of the steel plate P2, and is also large in terms of the thickness of the copper plate. A-A is a line indicating the end face position of the steel plate, and B-B
is a line indicating the center of the steel plate, and AXA is the feeding direction of the steel plate. This feed rate is 0.2~1.0 m/3ea when synchronized with normal rolling operation, and on average Q,4m/3ea.
sec, but it can basically be applied to other ranges as well.

FIG. 2A is a plan view of an exemplary process and FIG. 2B is a side view of the same process. The printing plate Pi-j or P2 is sent out from the hot rolling machine 3HM and placed on the conveyor 11. The conveyor 11 includes a rotatable delivery roll 12 supported by a support frame 13.

The steel plate passes through a leveler 14 and is then piled by a cooling piler 16 or passed through a cooling piler 16, cut by a shear 15, and piled by an end shear piler 17. The length of sheared steel plates is not fixed and often varies. Although the present embodiment shows the case of a steel plate, it should be noted that even if the conveyed object is a rod, pipe, box, etc. instead of a steel plate, the same basic equipment can be used to achieve the same effect.

In the present invention, the steel plate (object) Pli to be conveyed on the conveyor 11 having a certain speed is located along the front end face of the stopping position and is away from the length of one object, A-A shown in FIG. Measure the length of an object at a point on a line. The length of the object P1 is the conveyor speed i.In order to measure under constant conditions, when the tip of the object passes the point on the line A-A shown in Fig. 4, start counting the number of constant-gap pulses, The configuration is such that the number of pulses is stopped when the end of the object passes through the core point. The number of pulses counted while passing that point is proportional to the length of object P1.

The fourth point is that the transport conveyor 11 carrying the object P1 further transports the object P1 and stops at the center of the object P1.
It is on the line B-B shown in the figure, and is assumed to be the line (the number of pulses with twice the frequency). For example, the object P at the measurement point on the A-line of entry
If the number of length measurement pulses in 1 is 1000 counts, B
- The number of pulses is selected so that 2000 pulses are counted for object length measurement at the measurement point on line B.

The number of pulses measured at the measuring point on the B-B line is subtracted from the number of pulses measured on the A-incoming line, and when the number of pulses becomes "zero", the conveyor 11 is stopped.

This means that the center of the object P1 placed on the conveyor 11 is stopped at a predetermined position on the line BB 44.

Next, a method of measuring the length of the object P1 and controlling the stop position will be explained. First, since the pulses used for measurement are important, the pulses used will be explained.

Figure 3 shows one of the pulse generation methods used for measurement length and stop control.
FIG. This is a case where a commercial power source (AC 50 cycle H2 in the Kanto area) is used. However, the power source is not limited to commercial power sources, and a power source with a certain frequency arbitrarily selected from among any frequencies depending on the intended use can be used. In the present embodiment, the frequency of a commercially purchased power source is used.

At the measurement point on the A-incoming line, which has already been explained, a half-wave rectifier Norculus is used. Further, a full-wave rectified pulse is used at the measurement point on the B-B line. A current pulse 1 of AC 50H2 is applied to the circuit 7. The half-wave rectified waveform current 2 is passed through the half-wave rectifier 5 and connected to the switch 4A and the circuit 9At with the circuit 8A.
-Then, the pulse counter 9 is energized and held. For the stop signal, current pulse 1 of AC 50H2 is applied from circuit 7, passed through full-wave rectifier 6, and full-wave rectified waveform current 3 is passed through circuit 8B to pulse counter 9 via switch 4B and circuit 4B. However, the full-wave stop measurement value adapted to the half-wave measurement value described above is used to achieve the object of the present invention.

Next, the object P1, measurement length, and stop control will be explained. From the time when the tip F of the object P1 is detected to pass the measurement point on the A-incoming line, counting of pulses of the half-wave rectified waveform 2 shown in FIG. 5 is started, and the pulse counter 9 is made to simultaneously hold the start of integration. When pulse counting is stopped when the rear end E of the object P1 passes the measurement point on the A-incoming line, the counter 9 accumulates and holds a constant number of pulses proportional to the length of the object P1.

B- is the position where the object P1 placed on the conveyor II passes through the measurement point on the A- entry line and matches the center of the object P1.
From the point at which the tip F of the object P1 passes through the measurement point on the line B, that is, from the point at which the measurement starts due to the passage of the object P1, the pulse callan) 1 starts with the full-wave rectified waveform 3 explained in FIG. 3 above. Then, the IOB input value is subtracted from the IOA input value that matches the accumulated accumulated pulse count counted at the measurement point on A-Af@, that is, the equivalent pulse count proportional to the length of the object P1. IOA and IOB shown in FIG. 5 indicate the input of pulse counting, and the circuit 9 shown in FIG.
Do this through A and 9B. In this way, the number of full-wave count pulses on the B-B line is subtracted from the number of half-wave count pulses at the measurement point on the A-incoming line, and when the value ACC reaches the "zero" count number, the conveyor 11 is stopped as action R. Set it up on a regular basis. The center of the object P1 placed on the conveyor 11 is stopped on the line B-B, that is, at a predetermined position. ACC in the figure indicates the sum of the parnucalant integration 10A and the subtraction 10B, and R in the figure indicates an action based on the result.

In this series of operations, commonly used object detectors such as phototubes and proximity switches are used to detect objects, and commonly used microswitches are used to assist in stopping operations.

In Fig. 1A, the tip F of an object P1 with a certain steel plate thickness is
When passing on the A-incoming line in the AA force direction, an unillustrated sensor on A-AM senses it and starts counting, and stops counting when the rear end E passes. Cumulative half-wave count f during this period
Directly is stored in a pulse counter not shown. Next, the tip F reaches the line B-B where full-wave counting measurement starts (not shown), starts pulse counting and subtracts, and reaches the ``zero pulse product subtraction result'' on the line B-B, and as a result, the conveyor is stopped. B-B
A point on the line indicates the center of object P1.

Figure 1B shows two types of steel plates, one P1 is thicker and twice the length than the other P2, and each is shown separately when all piled. They may be piled together one after another. Object P
1, the front tip F reaches the A-A line shown in Figure 4, is detected by the sensor, half-wave pulse count is counted, and is accumulated until the rear edge E passes (not shown in Figures 3 and 5). 9) The tip F of the object P1 held in the pulse counter reaches the position and time point B-B line where full-wave pulse counting starts as shown in FIG. 4, is detected by the sensor, and full-wave pulse counting starts. , when the calculated value ACC (Fig. 5) reached zero by subtracting it from the integrated value of the half-wave pulse number, F-PM
At the top, the conveyor is stopped and it is piled up at the center of object P1. The length of the object P2 is a half the length of the object P1, and the leading edge is similarly detected on the line A-A, and half-wave pulse counts are accumulated until the trailing edge E passes, and as the conveyor progresses, the front edge F increases. When the object P2 completely passes over the B-B line, a full-wave needle plate pulse count is started, and the conveyor is stopped when the center of the object P2 reaches the B-B line where ACC reaches zero, as in the above case. A full wave pulse count is calculated indicating that object P2 is piled.

Next, other embodiments will be described. Stainless steel plate (material 5US304) finished rolled by a hot rolling mill, thickness 3 m1m x width 1,000 m, length 4.000 m1
In the process of finishing the steel plate with a leveler and moving it onto the roller table conveyor 11 for piling, the steel plate is conveyed and moved on the roller table of the conveyor 11, and the tip of the copper plate P1 is attached to the sensor installation. When reaching the point A-A line, pulses with a half-wave rectified waveform are counted, and 500 counts are recorded and integrated at 1 when the rear end of the steel plate passes the measurement point on the A-A line, and this integrated value is the pulse It was held by counter 9. This embodiment will be understood with reference to FIGS. 1, 3, and 5, in which similar and essentially similar equipment is applied.

The object P1 is further conveyed on the roller table, and when the tip F of the object P1 reaches a predetermined point on the stopping point B-Bi, pulse counting is started as full-wave rectification, and while integrating, the pulse counter is (Possessing half-wave pulse Curran) Starting from ACC to subtraction Becomes zero, action R
As a result, the conveyor 11 stops and starts piling. At this stop, piling of the object P1 in a direction perpendicular to the roller table (see FIGS. 2A and 2B) is completed. In this case, the "deviation" between the stopping position of the center of the length of the object P1 on the roller table and the designated stopping point on the B-B line was within the range of 5 to 10 mm even after the piling was completed. .

In conventional manual operations, the "deviation" is approximately 30
Therefore, it can be said that the improvements made by the present invention have significantly improved accuracy and ensured that automatic unmanned operation has been significantly effective. Safe work was also guaranteed.

The present invention has already been explained based on embodiments and drawings.

According to the present invention, automatic unmanned piling of objects such as rolled objects, including objects in the process of irregular shapes, can be performed reliably and with high precision. Therefore, if applied only to processes that do not involve shape irregularities and processes that constantly manufacture or inspect objects with constant shapes (such as steel plates, sheets, pipes, boxes, etc.), it will be possible to completely It can be said that it is a piling device that safely and reliably performs automatic and unmanned continuous work.

[Brief explanation of the drawing]

FIG. 1A is a model of one of the simplest embodiments of the present invention,
Fig. 1B is a slightly complicated model of an embodiment, Fig. 2A is a plan view, Fig. 2B is a side view, and Fig. 4 is a process diagram for implementing the present invention. FIG. 3 is an implementation layout diagram of an apparatus that uses a commercial power supply and stores half-wave pulse counting and full-wave pulse counting in a pulse counter according to the first embodiment. Figure 5 is the third
A more detailed explanatory diagram of the figure. 1.2.3... Pulse rectified waveform A-A... Half-wave pulse measurement line, sensor position line B-B
...Full wave pulse calculation line, stop line, sensor position line 11...Conveyor 12...Conveyor roller, conveyor table 13...
...Conveyor frame PL, P2... Steel plate, target object F... Object front (tip) end (face) E... Object rear end (face) AA... Object conveyance direction 4A, 4B...・Switches 7, 8A, 8B, 9A, 9B...Circuit 5...
Half-wave pulse rectifier 6...Full-wave pulse rectifier SA, SM, SB...Station, predetermined point (position) in the process 9...Pulse counter ACC...Pulse cumulative count R... Action (transmission) 14...Repeller device 15...Shear device 10A...Calculate half wave fr1 10B...Full wave integration subtraction Patent applicant: Agent of Nippon Metal Industry Co., Ltd.
Patent Attorney Nakanishi - Me 3 supposed to be 4 times

Claims (1)

[Claims] In a device for stopping piling at a predetermined point of a tangible object such as a steel plate, sheet, rod, box, etc. having a predetermined length to be carried on a conveyor by aligning the centers of the object, the above-mentioned tangible The progress of the front end of the object is detected on a conveyor that detects the front end and rear end of the object at a fixed position, counts and integrates the length of the object by half-wave pulse counting, and stores the number of pulses. When passing over the stop line, the conveyor is counted and integrated using a full-wave pulse count, and is subtracted from the accumulated value of the half-wave pulse count, and when the total count reaches zero, the conveyor is stopped and piled. An endoshear piler operation control method characterized by: