JPS59133161A - Method of piling up cut plates - Google Patents

Abstract

PURPOSE:To control the height of the piled surface of cut plates to be always constant by controlling the lowering amount of a lifter based on both outputs of a sheet sensor which counts the number of sheets of the cut plates and a lifter position sensor which detects the raised position of a lifter, and learning and correcting a set amount of lowering. CONSTITUTION:Prior to the operation, the plate thickness of a cut plate 2 and the set amount of lowering are previously inputted in a control computer 20, and the required number of sheets of the cut plates 2 with respect to the set amount of lowering is operated. Then, when the shearing is started and the cut plates 2 are piled on a lifter 10, signals for the number of passed sheets of the cut plates 2 are inputted from a sheet sensor 6 into the control computer 20. And, when the required number of sheets is reached, the control computer 20 issues a command to lower the lifter 10 to a hydraulic selector valve 12, and the lifter 10 is lowered by means of the operation of a hydraulic cylinder 14. When the set amount of lowering is reached, the lifter 10 is stopped while, at this time, the following set amount of lowering is subtractingly corrected based on the deviation between the set amount of lowering and the actual amount of lowering in the control computer 20.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for stacking cut plates, and more particularly to an automatic stacking method that can control the height of cut plates and layer surfaces to a constant level in a piler device.

The area is sheared with a shearer, and the cut plates are conveyed by a belt conveyor and stacked on a piler, but the stacking surface of the cut plates on the piler needs to be maintained at a constant level. If it is too low or too high, it will cause scratches on the cutting board and cause high-speed shearing work.

Conventionally, in order to maintain the laminated surface of the cut plates in a piler at a constant height, a set of proximity switches were used to control rON-〇Fk.
Detection and control of the height position has been carried out by methods such as a method of causing the piler to move and a method of determining the amount of descent of the piler by measuring the discharge flow rate of the hydraulic system.

However, the method using a proximity switch is unstable due to malfunction due to surrounding metal parts, and it is difficult to accurately determine the height position. ! In the past, the method of measuring the discharge flow rate of a hydraulic system had poor accuracy due to large fluctuations in I4 lower speed and leakage ridge at the beginning and end of stacking, and it was previously difficult to maintain a constant lifter height. . In addition, handling of oil was time-consuming and maintenance was complicated.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art and to provide a method for laminating cut plates in which the height of the piler laminated surface can be controlled to a constant level.

The gist of the present invention is as follows.

That is, a 7-tooth sensor that counts the number of cut plates continuously cut from a steel strip, and a lid that stacks the cut plates.
and a lifter position sensor for detecting the vertical position of the lifter; and a control computing unit for inputting and controlling signals from each of the devices, wherein the control computing unit comprises: , a step of inputting the thickness of the cut plate and a set descending amount of the lifter in advance and calculating a predetermined number of sheets corresponding to the set descending amount; and a step of inputting a cut board number signal of the sorting sensor and reaching the predetermined number of sheets. Step 1: issuing a descending command to the 7-wheeler, inputting a signal from the lifter position sensor indicating that the 7-wheeler has reached a set descent amount and issuing a stop command to the lifter, and a step from the lifter position sensor. Receiving the signal of the lowering stop position of the lifter comprises the steps of calculating the difference between the set lowering amount and the actual lowering amount of the lifter, and subtracting and correcting the next set lowering amount. This is a method of laminating cut plates.

The details of the present invention will be explained by examples. First, the piler device used in the present invention will be explained with reference to FIG.

The sheared cut plates 2 are conveyed by a belt conveyor 4, and counted by a sheet sensor 6 along the way. The cut plates 2 falling from the belt conveyor 4 are guided by a guide plate 8 and stacked on a lifter 10. The lifter 10 is raised and lowered by operating a hydraulic cylinder 14 by operating a hydraulic switching valve 12. The position sensor of the lifter 10 is composed of a magnetic scale 16 that descends with the lid 1O and a magnetic cool sensor 18 whose height is fixed.

The control calculator 20 receives signals from the note sensor 6 and the magnescale sensor I8 and controls the lifting and lowering of the lifter 10 via the hydraulic switching valve 12 and the hydraulic cylinder 14.

Next, a method of laminating cut plates according to the present invention in a piler having the above structure will be explained. First, the thickness of the plate to be cut and the set amount of descent are input in advance to the control calculator 20, and the number of pieces of the plate to be cut corresponding to the set amount of descent is calculated. When shearing is started and the cut plates 2 are stacked on the lifter 10, a signal for the number of cut plates 2 exceeding 7 is constantly inputted from the sheet sensor 6 to the control calculator 20, and when a predetermined number of sheets is reached, the control calculator 20 switches the hydraulic pressure. A command to lower the lifter 10 is issued to the valve 12, and the hydraulic cylinder 14 is operated by operating the hydraulic pressure switching valve 12, and the lifter 10 is lowered. The control calculator 20 inputs a signal indicating the lowering position of the lifter 10 from the magnescale sensor 18, and when the set lowering amount is reached, issues a command to the hydraulic switching valve 12 to stop the lowering of the lifter 10. Generally, the hydraulic system has an operation delay, so after the lifter 10 stops descending, the control calculator 20 compares the set descending amount and the actual descending amount, calculates the difference, subtracts this difference from the next set descending amount, and corrects the next time. repeat this operation using the corrected set descent amount. Fig. 2 shows the relationship between the descending command, the hydraulic operation, its operation delay, the set descending amount, the actual descending amount, etc. in chronological order. As shown in FIG. 2, the height of the laminated surface of the flap cover 10 can be maintained constant in the present invention by constantly correcting the delay in hydraulic operation. Furthermore, by using the Magnescale 18, the ascending and descending positions of the lifter 10 can be easily displayed to the operator in units of steps.

As is clear from the above embodiments, the present invention inputs information from the sheet sensor sensor 7 to the position sensor to a control calculator to control the descent of the piler, thereby adjusting the height of the piler's cutting plate 81j. It becomes possible to control the temperature at a constant level, which has a great practical effect.

[Brief explanation of the drawing]

FIG. 4 is a schematic sectional view showing the piler device used in the present invention and its circuit, and FIG. 2 is a diagram showing a chronological comparison of the stages of the lamination method in the present invention. 2... Cutting board 6... Sheet sensor lO・
...Lifter 14...Hydraulic cylinder 16...
Magnescale 18...Magnescale sensor 20...Control computer agent Patent attorney Takeo Nakaji

Claims (2)

[Claims] (1) A sheet sensor that counts the number of cut plates continuously cut from a steel strip, and a lid for laminating the cut plates;
In the method for stacking cut plates in a piler device comprising a lid position sensor for detecting the vertical position of the lifter, and a control calculator for inputting and controlling signals from each of the devices, the control calculator comprises: , a step of inputting the thickness of the cut plate and a set lowering amount of the lifter in advance and calculating a predetermined number of sheets corresponding to the set lowering amount; and a step of manually inputting the cut plate number signal of the sheet sensor and reaching the predetermined number of sheets. a step of issuing a descending command to said lifter at said step; a step of inputting a signal from said lifter position sensor indicating that said seven wheels have reached a set lowering amount and issuing a stop command to said lifter; It is characterized by comprising the step of receiving the signal of the lifter's descent stop position, calculating the difference between the set descent amount of the lifter and the actual descent amount, and subtracting and correcting the next set descent amount. How to stack cut plates. (2) The method for laminating cut plates according to claim 1, wherein the rotor position sensor uses Magnescale.