JPH0133401B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical field of industry to which the invention pertains The present invention is suitable for a metal end shear piler operation, for example, when a steel plate is rolled or cut and the length of the steel plate is not constant on a conveying roller table. The present invention relates to an operation method for controlling and automating these work processes by stacking or transporting stacked products after accurately measuring the center of gravity position.

Problems with conventional technology At the end of the conveyance process for stainless steel plates, other metal plates, or plastic sheets, they are sheared to a predetermined length and deposited, 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. In the following, the stainless steel plate will be described as a representative example, although it can also be applied to other types of plates or sheets. Some stainless steel plates are rolled and the leading and trailing ends of the steel plate are not sheared, but each plate is piled using a piling device. Traditionally, these operations were performed manually. Rationalization of these operations has been required, and operational safety, reliability, and guarantee have been required. No two steel sheets after rolling have exactly the same shape and dimensions. Piling them safely and accurately is an important issue 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 solving the problems of the present invention Furthermore, in the rolling process, the original plate pickling method changed from the conventional pickling method to continuous vertical pickling (PFL), which resulted in three-stage rolling (three-high mill rolling). , 3HM symbol in Figures 2A and 2B) It became necessary to take into account that the work of cutting the leading and trailing ends of upstream steel plates with shears and transporting them has increased. As a result, processes that used conventional cooling pilers have been replaced by end-shear pilers, and the frequency of use of end-shear pilers has increased dramatically. As shown in FIG. 2B, it was confirmed that the improvement of the end shear piler should be a subject of the present invention. 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 for detecting the center of steel plates and stacking them in an aligned manner, and a method that allows the same device to detect the end faces of steel plates and stacking 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 described based on the drawings. 1A and 1B show the case where steel plates P1 and P2 are moved to locations SA, SM, and SB, and the exemplary steel plate P1 has a length twice the length a of the steel plate P2, and the steel plate P1 has a thickness of It's still big. A-A is a line indicating the end face position of the steel plate, B-B is a line indicating the center of the steel plate, and AA is the feeding direction of the steel plate. This feed rate is 0.2 when synchronized with normal rolling operation.
~1.0 m/sec, on average about 0.4 m/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. Steel plate P1 or P2 is
Delivered from hot rolling mill 3HM, conveyor 11
be mounted on top. The conveyor 11 is the support frame 1
3 and is rotatable. The steel plate passes through a leveler 14 and is then piled by a cooling piler 16 or cooled by a cooling piler 1.
6, it is cut by a shear 15 and piled by an end shear piler 17. The length of the sheared steel plate 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, a steel plate (object) P1, which is carried on a conveyor 11 having a certain speed, is placed at a position along the front end surface of the stopping position and away from one object length, as shown in FIG. Measure the object length at a point on line A. Since the length of the object P1 is measured under the condition that the conveyor speed is constant, 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, and The configuration is such that counting of the number of pulses is stopped when the end passes the point. The number of pulses counted while passing that point is proportional to the length of object P1.

The point at which the conveyor 11 carrying the object P1 further transports the object P1 and stops at the center of the object P1 is on the line B-B shown in FIG. From the time of passing, from the number of pulses measured at the point on the A-A line, B-B
Start subtracting the number of pulses measured on the line. By the way,
The number of pulses measured on the counted A-A line is stored in a pulse counter. In this case, the pulse gap on the line B-B is 1/2 (the number of pulses with twice the frequency) the gap between the pulses on the line A-A.
For example, if the number of pulses for measuring the length of object P1 at the measurement point on line A-A is 1000 counts, the number of pulses is selected so that the length measurement of the object at the measurement point on line B-B counts 2000 pulses. .

From the number of pulses measured on the A-A line, B-
The number of pulses measured at the measurement point on line B is subtracted, and when the number of pulses reaches "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 B-B.

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.

FIG. 3 is a diagram illustrating one example of a pulse generation method used for measurement length and stop control. This is when using a commercial power source (AC 50 cycle Hz in the Kanto area). 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. Half-wave rectified pulses are used at the measurement points on the line A--A, which have already been explained. Further, a full-wave rectified pulse is used at the measurement point on the B-B line. A current pulse 1 of 50 Hz AC is applied to the circuit 7. A half-wave rectified waveform current 2 is passed through a half-wave rectifier 5 through a circuit 8A, and passed through a switch 4A and a circuit 9A to a pulse counter 9 and held therein. For the stop signal, current pulse 1 of AC 50 Hz is passed from circuit 7, passed through full wave rectifier 6, full wave rectified waveform current 3 is passed through circuit 8B, and passed through switch 4B and circuit 4B to pulse counter 9. The stopping full-wave measured value adapted to the above-mentioned measured half-wave measured value 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 passes the measurement point on the line A-A, counting of the 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. Object P1
When pulse counting is stopped when the rear end E passes the measurement point on the A-A line, the pulse count number is 9.
In this case, a constant number of pulses proportional to the length of the object P1 is accumulated and stored.

The object P1 placed on the conveyor 11 passes through the measurement point on the A-A line and reaches a position where the tip F of the object P1 passes through the measurement point on the B-B line, which is the position where it coincides with the center of the object P1. , that is, from the point in time when measurement is started due to the passage of object P1, pulse counting is started using the full-wave rectified waveform 3 explained in FIG. 10A that is compatible with the equivalent pulse count proportional to the length of object P1
Subtract the 10B input value from the input value. 10A and 10B shown in FIG. 5 indicate input of pulse counting, which is carried out through circuits 9A and 9B shown in FIG. 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-A line, and when the value ACC reaches the "zero" count number, the conveyor 11 is stopped as action R. Set the configuration. 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 pulse count integration 10A and the subtraction 10B, and R in the figure indicates the action resulting from 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, when the tip F of an object P1 having a certain steel plate thickness passes on the line A-A in the direction of AA,
An unillustrated sensor on the line A-A senses it and starts counting, and stops counting when the rear end E passes. The cumulative half-wave count value during this period is stored in a pulse counter not shown. Next, the tip F reaches the B-B line where full-wave counting measurement starts (not shown), starts pulse counting and subtracts, and reaches the "zero pulse integration subtraction result" on the B-B line, and as a result, the conveyor is stopped and the B
A point on the -B line indicates the center of the object P1. In Figure 1B, there are 2 types of steel plates, 1 type P1 is different from the other 1 type.
When piling a material that is thicker and twice as long as the seed P2, each is shown separately, but in reality, they may be piled together one after the other. Object P1 is A shown in FIG.
- When the front tip F reaches line A, it is detected by the sensor and a half-wave pulse count is counted, which is accumulated until the point when the rear tip E passes and is held in a pulse counter (not shown in the figure (Figures 3 and 5, 9)). The tip F of the object P1 reaches the position and time point B-B line where the full-wave pulse count starts as shown in FIG. Subtract from the calculated value ACC (5th
When P1 reaches zero, the conveyor is stopped on the line F--F, which is the center of the object P1, and piled up. 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 passing over the B-B line, full-wave counting pulse counting is started, and as in the above case, when ACC reaches zero, B
A full wave pulse count is calculated so that the conveyor is stopped when the center of object P2 reaches line B, indicating that object P2 is piled.

Next, other embodiments will be described. Stainless steel plate (material
SUS304) Thickness 8m/m x Width 1.000mm, Length 4.000mm
In the work process of moving the steel plate onto the roller table conveyor 11 and piling it after finishing it with a leveler, the steel plate is conveyed and moved on the roller table of the conveyor 11, and the tip of the steel plate P1 is placed on the sensor. When reaching the point A-A line, the pulses are counted in a half-wave rectified waveform, and by the time the rear end of the steel plate passes the measurement point on the A-A line, 500 counts are recorded and accumulated, and this accumulated value is recorded on the pulse counter. 9 was held. 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-B line, pulse counting is started as full-wave rectification, and while integrating, the pulse counter is Possessing half-wave pulse count ACC
, and when it reaches the center of the object P1, that is, on the 1/2 length B-B line (Fig. 1A C
point), the counter display (not shown) becomes zero, and the conveyor 11 stops as action R 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, there is a "displacement" between the stopping position of the center of the length of the object P1 on the roller table and a predetermined point on the designated stopping point B-B line.
Even after the pile ring was completed, it was within the range of 5 to 10 mm. In the conventional manual operation, the "deviation" was about 30 mm, so the improvements made by the present invention significantly improved accuracy and reliability, and the automatic unmanned system was significantly effective. I can do it.
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 irregular shapes and processes that constantly manufacture or inspect objects with a constant shape (such as steel plates, sheets, pipes, boxes, etc.), the 100
It can be said that this is a piling device that safely and reliably performs fully automatic, unmanned continuous work at a rate of 1.5%.

[Brief explanation of drawings]

Fig. 1A is a model of one of the simplest embodiments of the present invention, Fig. 1B is a model of a slightly more complicated embodiment, Fig. 2A is a plan view, Fig. 2B is a side view, and Fig. 4
The figure is a process diagram for carrying out the present invention, showing a side view. Third
The figure is an implementation layout diagram of a device that uses a commercial power supply and has a half-wave pulse count and a full-wave pulse count in a pulse counter. FIG. 5 is a more detailed explanatory diagram of FIG. 3. 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, P
1, P2...Steel plate, target object, F...Object front (tip) end (surface), E...Object rear end (surface), AA...
Object conveyance direction, 4A, 4B... switch,
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 integration count, R...Action (transmission), 14...Leveler device, 15...Shear device, 10A...Half wave integration, 10B...Full wave product subtraction.

Claims (1)

[Claims] 1 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 On a conveyor that detects the front and rear ends of a tangible object at a fixed position, counts and integrates the length of the object by half-wave pulse counting, and stores the number of pulses, the front end of the object is moved forward. When passing over the progress stop line, count with full wave pulse count and start integration.
An end shear piler operation control method, characterized in that the conveyor is stopped and piled when the total count reaches zero by subtracting the half-wave pulse count from the accumulated value.