JPS5997917A - Conveyance and control method of bloom - Google Patents

Abstract

PURPOSE:To aim at improvements in the efficiency of material distribution, by calculating those of specified evaluation items and material distribution efficiencies according to a weight coefficient just before blooms of each plane are taken in or out, while controlling these blooms so as to be taken in or out the plant that has a maximum evaluation point. CONSTITUTION:At an assorting point 15 for first and second pipe cutters 13 and 14, a control unit 20 calculates each time an evaluation point for the efficiency of material distribution in each of these pipe cutters 13 and 14 on the basis of influencing degree evaluation items affecting the efficiency of material distribution for the preset taking-in, for example, those of pipe cutter capacity, lot number, pipe end change, thickness change, O.D. change, table empty capacity and their weight coefficients. Among them, some of these pipe cutters 13 and 14 being large in the evaluation point is selected for a taking-in destination and conveyed to the selected pipe cutter. Whether which pipe 10 of both pipe cutters 13 and 14 is conveyed to a downstream conveyor 12 or not is also evaluated by a control unit 22 and determined. With this constitution, the efficiency of material distribution can be well improved.

Description

[Detailed description of the invention] The present invention relates to a method for controlling conveyance of steel billets.

Conventionally, when multiple pieces of equipment for carrying in and out of steel pieces are arranged in parallel on a conveyance line, sorting the pieces of steel to which equipment to carry them into is a task, or deciding which piece of equipment to carry out the copper pieces from. The merging work is done intuitively based on the situational judgment of the operator operating the conveyance line.As the branching and merging of equipment that is arranged in parallel becomes complicated, logistics efficiency deteriorates. There is a problem in that there is a lot of unnecessary waiting time for steel billets upstream and downstream of the equipment, making it impossible to improve distribution efficiency.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for controlling the conveyance of steel billets, which reduces wasteful waiting time upstream and downstream of equipment arranged in parallel in a conveyance line, and improves logistics efficiency. do.

In order to achieve the above object, the present invention provides a method for selecting equipment for transporting or unloading steel billets when a plurality of equipment for transporting or unloading steel billets are arranged in parallel on a conveyance line. In this transportation control method, assuming that steel billets are transported to or removed from each facility, the evaluation items and their weights are used to evaluate the degree of impact of the delivery or removal on logistics efficiency. The coefficients are determined in advance,
Immediately before the steel billet is carried into any of the facilities or immediately before it is carried out from any of the facilities, an evaluation score is calculated for each facility based on the above-mentioned evaluation items and their weighting coefficients, and that score becomes the maximum. It is designed to be carried into or removed from the equipment.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an explanatory diagram showing a conveyance line for steel pipes 10 as an example to which the present invention is applied. Between the upstream conveyor 11 and the downstream conveyor 12 of the conveyance line, a first tube cutter 13 and a second tube cutter 14 are arranged in parallel with each other. The first pipe cutter 13 and the second pipe cutter 14 are devices that cut the end crop of the steel pipe 10 and chamfer the ends, and both pipe radicles 1
3.14 has substantially the same specifications, but the first pipe cutter 13 is capable of chamfering a special shape and dividing the steel pipe 10 into three equal parts by cutting in the middle.

Steel pipe 10 being conveyed by the upstream conveyor 11
In this case, the sorting is done at point 15, and the destination equipment is transferred to the first pipe cutter 1.
It is possible to determine either the 3 year old or the second pipe cutting machine 14. The steel pipes 10 processed by the first pipe cutting machine 13 and the second pipe cutting machine 14 are each processed at each confluence point 16A.
, 16B, which steel pipe 10 is connected to the downstream conveyor 1
It is possible to decide which side is to be carried out.

Here, the above sorting is performed on the upstream conveyor 11 at point 15.
The decision as to which of the first pipe cutting machine 13 and the second pipe cutting machine 14 to carry the above steel pipe 10 into is made as follows. That is, the steel pipes 10 are carried into either the first pipe cutter 13 or the second pipe cutter 14, and the control device 20 controls sorting to the first pipe cutter 13 or the second pipe cutter 14. If we assume that
Established as shown in .

Table 1 Therefore, the first pipe cutting machine for steel pipe 10 is 13 years old, and the second pipe cutting machine 1
4, the control device 20 extracts the weighting coefficients obtained when the copper pipe 10 is carried into the first pipe cutting machine 13 for each evaluation item, and calculates the sum of the extracted weighting coefficients for the first pipe cutting machine 13. The evaluation point for the 1-pipe cutting machine 13 is F1. The control device 20 also extracts weighting coefficients obtained when the steel pipe 10 is carried into the second pipe cutting machine 14 for each evaluation item, and assigns the sum of the extracted weighting coefficients to the second pipe cutting machine 14. The evaluation point is F2. Furthermore, the control device 20 has the above-mentioned evaluation point F.
1 and evaluation point F2, the first one that obtained a higher evaluation point
The pipe cutter 13 or the second pipe cutter 14 is determined as the destination of the steel pipe 10.

Further, at each of the above-mentioned confluence points 16A and 16B, the decision as to which of the first pipe cutter 13 and the second pipe cutter 14 to carry out the steel pipe 10 to the downstream conveyor 12 is made as follows. That is, when it is assumed that the steel pipe 10 in either the first pipe cutter 13 or the second pipe cutter 14 is carried out to the downstream conveyor 12, the control device 22 that performs merging control to the downstream conveyor 12 has The evaluation items and their weighting coefficients for evaluating the degree of influence of the transport on the distribution efficiency are determined in advance, for example, as shown in Table 2.

Table 2 Therefore, immediately before the steel pipe 1 is transferred from the first pipe cutter 13 or the second pipe cutter 14 to the downstream conveyor 12, the control device 22 controls the
The weighting coefficients obtained when 0 is carried out from the first pipe cutting machine 13 are extracted, and the sum of the extracted weighting coefficients is set as the evaluation point G for the first pipe cutting machine 13. The control device 22 extracts the weighting coefficients obtained when the steel pipe 10 is carried out from the second pipe cutting machine 14, and sets the sum of the extracted weighting coefficients as the evaluation point G2 for the second pipe cutting machine 14. do. Furthermore, the control device 22 compares the evaluation points G1 and G2, and determines the first pipe cutter 13 or the second pipe cutter 14 that obtained the higher evaluation score as the light source for carrying out the steel pipe 10. .

Note that the present invention is also applicable, for example, in a transport line in which two or more inspection tables are arranged in parallel, sorting to each inspection table is controlled and merging from each inspection table is controlled. . Further, in a conveyance line equipped with two or more billet stacking devices, the present invention can also be applied to the case where sorting to each billet stacking device is controlled.

As described above, the present invention determines the evaluation items and their weighting coefficients in advance based on, for example, the capacity of each piece of equipment, the status of steel billet work in each piece of equipment, loft information, quality information, etc. Based on the evaluation score of each facility obtained by the method, it is possible to rationally determine the destination for carrying in the steel billet and the light facility for carrying out the steel billet. According to the present invention, the loft information and quality information of the steel billets are properly grasped to control sorting and merging, thereby preventing foreign materials from entering the billet stacking device, etc., and ensuring quality. This can be done reliably.

As described above, the present invention provides a method for conveying steel billets to select equipment for conveying or taking out steel billets when a plurality of facilities for carrying in or taking out steel billets are arranged in parallel on a conveyance line. A control method, wherein a steel billet is conveyed to each piece of equipment,
Or, assuming that the copper pieces will be carried out from each facility, the evaluation items and their weighting coefficients for evaluating the degree of influence that the carrying in or carrying out will have on the logistics efficiency are determined in advance, and the copper pieces are carried into any of the facilities. Immediately before or just before being carried out from any of the facilities, an evaluation score is calculated for each piece of equipment based on the above-mentioned evaluation items and their weighting coefficients, and the product is carried into or carried out from the facility with the highest score. This makes it possible to reduce wasteful waiting time upstream and downstream of equipment arranged in parallel within the conveyance line, and improve logistics efficiency.

[Brief explanation of the drawing]

FIG. 1 is a layout diagram showing a steel pipe conveyance line as an example to which the present invention is applied. 10... Steel pipe, 11... Upstream conveyor, 12...
Downstream conveyor, 13...first pipe cutter, 14...second
Pipe cutting machine, 15... Sort by point, 16A, 16B...
Junction point, 20.22...control device. Agent Patent Attorney Osamu Shiokawa

Claims (1)

[Claims] (1) When multiple pieces of equipment for carrying in or carrying out steel billets are arranged in parallel on a conveyance line, conveying steel billets,
Alternatively, there is a method of controlling the conveyance of steel billets to select the equipment to be carried out, and if it is assumed that the billets are conveyed to each piece of equipment or taken out from each piece of equipment, the method of controlling the conveyance of the pieces of steel to select the equipment to be carried out is a method in which the carrying-in or carrying-out of the pieces of steel does not affect the logistics efficiency. The evaluation items and their weighting coefficients for evaluating the degree of influence are determined in advance.
An evaluation score is calculated for each piece of equipment based on the evaluation items and their weighting coefficients, and the equipment is delivered to the equipment with the highest evaluation score,
Or a method of controlling the conveyance of steel pieces to be carried out from the equipment.