JPS60131111A - Automatic cutting device - Google Patents

Abstract

PURPOSE:To cut a long stretching material accurately while it is swung to the right and left alternately by determining the actual cut length using four sensors, a timer and a pulse generator, and by performing correction of the cutting error in terms of the time through control of the material sendout ratio and material speed. CONSTITUTION:When a sensor 8 senses the leading edge of a material 5A on the way of transportation from a common line 7 to a divergent line 6A, a control circuit 4 counts the number of pulses emitted by a pulse generator 2, and then a timer 12 is started. When the leading edge of the material 5A is sensed by another sensor 10, the control circuit 4 finishes counting of the number of pulses, and now the timer 12 is stopped. Then the control circuit 4 calculate the number of pulses Pcut, which specifies the time for emission of a cut signal after a certain period has passed since the material 5A is sensed by a sensor 10, from the data including the number of pulses P1 emitted from the generator 2 in the period from the sensor 8 sensing the leading edge of the material 5A till the sensor 10 sensing the same, the finish time T1 set on timer 12, the set cutting length L, and distances l1, l3. Now a cut command is given to the cutting machine 3.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic cutting device that cuts a long material such as a steel bar while distributing it left and right.

In conventional automatic cutting devices, the time from when the control circuit outputs a cutting signal to the cutting machine until it actually cuts the material (hereinafter referred to as r
Cutting control is performed by assuming that the cutting time is a fixed value (referred to as one cutting time). However, the cutting time includes the operating time of the mechanical system, which varies widely depending on the ambient temperature, the degree of wear of the cutter, the thickness of the material, etc. This variation affects the cut-to-brick J error and the trap becomes larger at higher material speeds.

Therefore, an object of the present invention is to provide an automatic cutting device that can correct errors in cutting time and accurately cut materials.

The automatic cutting device of the present invention cuts the elongated waste material transferred on the common running line, and alternately shakes it on one branched running line and the other branched running line connected to the common running line. An automatic cutting device that separates
a material feed roll that transports the material in the length direction at a constant speed; a pulse generator 2 that generates a pulse every time the material feed roll rotates at a constant rate as shown in FIG. 4; a timer 12; The first and M2 sensors 8 and 10 are sequentially arranged at a predetermined interval in the material feeding direction so as to face the branch running line, and When the third and fourth sensors 9 and 11 sequentially arranged at intervals, the cutting machine 3 that cuts the material on the common traveling line, and the first sensor 8 detect the tip of the material, start the pulse of the output pulse of the pulse generator 2;
a first pulse counting means 21 that stops the output pulse of the pulse generator 2 when the second sensor 10 detects the tip of the material; and a first pulse counting means 21 that stops the output pulse of the pulse generator 2 when the second sensor 10 detects the tip of the material; Said timer I2
A first timer 12 is started and the first timer 12 is stopped when the second sensor 10 detects the tip of the material.
a timer control means 22, a second pulse count means 23 that starts counting the output pulses of the pulse generator 2 when the second sensor 10 detects the tip of the material; The arrangement interval of the cutting machine 3 and the first sensor 8, the arrangement interval of the first and second sensors 8 and 10, the final count value of the first pulse counting means 21, and the first timer control means 22
a first cutting control calculation means 24 that calculates the number of pulses corresponding to the set cutting length by performing calculations based on the final time value when the timer 12 is activated and the predicted cutting time; , a first coincidence detecting means 25 which generates a coincidence output when the current count value of the second pulse counting means 23 matches the number of pulses determined by the first cutting control calculation means 23; a 16th cutting command means 26 for giving a cutting command to the cutting machine 3 in response to the coincidence detection output of the coincidence detection means 25; and a third pulse counting means 27 that stops the output/ζζsus count of the pulse generator 2 when the third unit 9 detects the tip of the material;
The set cutting length, the arrangement interval of the cutting machine 3 and the first sensor 8, the arrangement interval of the cutting machine 3 and the third sensor 9, and the arrangement interval of the first and second sensors 8 and 10. the first and third pulse counting means 2;
1. By performing calculations based on the final count value of 27 and the final time value when the timer 12 is activated by the first timer control means 22, the actual cutting time and the predicted cutting time are disconnected. A first cutting time error calculation means 28 that calculates a time error, and this first cutting time error calculation means 28
a first cutting time correction means 29 for correcting the predicted cutting time based on the cutting time error determined by the calculation;
When the fourth sensor 9 detects the tip of the material, it starts counting the output pulses of the pulse generator 2, and when the fourth sensor 11 detects the tip of the material, it starts counting the output pulses of the pulse generator 2. The fourth pulse counting means 30' to stop! :, when the third sensor 9 detects the tip of the material, the timer 1 is activated.
2, and stops the timer 12 when the fourth sensor 11 detects the tip of the material.
a timer control means 31, a fifth pulse scout means 32 that starts counting the output pulses of the pulse generator 2 when the fourth sensor 11 detects the tip of the material, and a set cutting length and the cutting machine 3. and the arrangement interval of the third sensor 9, the arrangement interval of the third and fourth sensors 9, 11, the final count value of the fourth pulse counting means 30, and the second timer control means 31.
A second cutting control calculation means 33 calculates the number of pulses corresponding to the set cutting length by performing calculation based on the final time value when the timer 12 is activated and the predicted cutting time. and a second coincidence detection means 34 which generates a coincidence output when the current count value of the fifth pulse counting means 32 matches the number of pulses requested by the second cutting control calculation means 33; a second cutting command means 35 for giving a cutting command to the cutting machine 3 in response to the coincidence detection output of the second coincidence detection means 34; and a count of output pulses from the pulse generator when outputting the cutting command. an M6 pulse counting means 36 that starts counting the output pulses of the pulse generator 2 when the first sensor 8 detects the tip of the material; The arrangement interval of the 10 sensors 8, the arrangement interval of the cutting machine 3 and the third sensor 9, the arrangement interval of the third and 40th sensors 9, 11, and the arrangement interval of the fourth and sixth pulse counting means 30.36. A cutting time error between the actual cutting time and the predicted cutting time is calculated based on the final count value and the final time value when the timer 12 is activated by the second timer control means 31. a second cutting time error calculating means 37 for calculating the predicted cutting time; and a second cutting time correcting means 38 for correcting the predicted cutting time based on the cutting time error calculated by the second cutting time error calculating means 37. The present invention is characterized by having a configuration including the following.

An embodiment of the present invention will be described based on FIGS. 1 to 3. As shown in FIG. 1, this automatic cutting device cuts a long material 5 placed on a common running line 7 that branches into branch running lines 6A and 6B from the middle into a material feeding roll 1.
The feed amount of the material 5 is detected by a pulse generator 2 which is axially coupled to the material feed roll 1, and the presence or absence of the material 5 at a predetermined position on the branch running line 6A is detected by the machine opposite to the branch running line 6A. The presence or absence of the material 5 at a predetermined position on the branch running line 6B is detected sequentially in the feeding direction so as to face the branch running line 68. A timer 12 is provided on the 1- and 12-side so that the two sensors 9 and 11 arranged side by side can detect the cutting machine 3. A cutting command is given to the continuously fed material 5 to be automatically cut into predetermined lengths on the common running line 7, and the branch running line 6A is cut.

It is designed to be distributed alternately to 6B. in this case,
The spacing between the cutting machine 3 and the sensors 8 and 9 is l, respectively.
l, the arrangement interval of sensor 8.1O is 13, and the arrangement interval of sensors 9 and 11 is l! It is 4.

A more detailed explanation will be given below based on FIGS. 2 and 3. It is now assumed that the control circuit 4 is performing cutting side a1 to cut the material 5 to a set cutting length L.

As shown in FIG. 2, the tip of the material 5A being sent from the common running line 7 to the branch running line 6A is located directly in the direction of the sensor 8, so that the sensor 8 detects the tip of the material 5A. When the output is turned on, the control circuit 4 starts counting the number of output pulses from the pulse generator 2 and also starts the timer 12f. Thereafter, the material 5A is fed at a constant speed as shown in Fig. 2 (
As shown in B), the sensor 1o detects the tip of the material 5A when the tip of the material 5A is located directly below the processor 1o, and when the output is turned ON, the control circuit 4 terminates the callantra of the above number of pulses. At the same time, the timer 12 is stopped and the final time value T□ of the timer 12 is read.

Thereby, the measured value P of the number of pulses output from the pulse generator 2 until the sensor 1o detects the tip of the material 5A while the sensor 8 detects the tip of the material 5A.
□ (proportional to the number of rotations of the material feed roll 1) and the measured value T□ of the time required during that time can be obtained. In this case, the arrangement interval 13 is divided by the measured value of the number of pulses, that is, 13/P is the delivery ratio of material #+5A, and the arrangement interval I! 3 divided by the measured time T, i.e., l! 3/Tl is the feeding speed of the material 5A.

Next, the control circuit 4 starts counting the number of output pulses from the pulse generator 2 after the sensor 1o detects the tip of the material 5A.

Next, the control circuit 4 controls the number of output pulses P□ of the pulse generator 2 and the timer 1 from when the sensor 8 detects the tip of the material 5A until when the processor 1o detects the tip of the material 5A.
2, the final time value T, the set cutting length, and the distance from the cutting machine 3 to the sensor 8 1 [? □ and sensor 8 to sensor 1o
Distance l! 3, the number of pulses PoUTtc from when the sensor 1o detects the tip of the material 5A until outputting the cutting signal is calculated. In this case, ノ(Russ number P.

UTf′i, function f(L.

t'1,13* P□, Tyo, Tcyu),
The control circuit 4 performs the calculation shown in equation (1) and determines the value of . It is determined that it is time to cut, and a cutting command is given to the cutting machine 3 to cut the material 5A as shown in FIG. 2(C).

f (L, Jl, 13. P engineering, T engineering, Tc engineering)
At the same time, the count of output pulses from the pulse generator 2 is finished, the count data of the first pulse counting means 21 is reset, and the third pulse counting means 27 immediately starts counting the output pulses of the pulse generator 2. Start.

Next, as shown in FIG. 2(D), when the sensor 9 detects the tip of the next material 5B to be cut and sent from the common running line 7 to the branch running line 6B, and its output turns ON, the control is activated. The circuit 4 finishes counting the number of ruses, and sets the final count value of the number of ruses to P.

Next, the control circuit 4 calculates the cutting time error T between the actual cutting time and the predicted cutting time Te by performing the operation
d, this cutting time error Td is added to the predicted cutting time Tc of upper F as shown in equation (3), and this addition result is set as the predicted cutting time TC1 for the next cutting.

......(3) Tc = Tcn + Td Furthermore, the tip of the material 5B is detected by seven amplifiers,
When the output is turned ON, the control circuit 4V'i/' starts counting the number of outputs/curses from the pulse generator V-2 and starts the timer 2. Then, touch the tip of material 5B to sensor 175! When it is detected and turned ON, it finishes counting the number of ruses and stops timer 2;
The final 1m value Tt of timer 2 is captured. As a result, after the sensor 9 detects the tip of the material 5B, the sensor 1
A measured value P3 of the number of pulses output from the pulse generator 2 until it detects the tip of the material 5B, and a measured value T of the time required during that time are obtained. In this case, the spacing/4 divided by the measured number of pulses, ie, I! 4/P3 is the feed rate of the material 5B, and is the arrangement interval 14 divided by the measured value T2 of the required time, that is, 1, and /T2 is the feed rate of the material 5B.

Then, the control circuit 4 starts counting the number of output pulses from the pulse generator 2 after the sensor 1 detects the tip of the material 5B.

Next, the control circuit 4 controls the number of output pulses P of the pulse generator 2 and the timer 2 from when the sensor 9 detects the tip of the material 5B to when the sensor l detects the tip of the material 5B.
The final time value T2, the set cutting length and the distance l from the cutting machine 3 to the sensor 9.

and the distance I from sensor 9 to sensor 1! 4, the number of pulses P from when the sensor 11 detects the tip of the material 5B until outputting the cutting signal. , T is calculated. In this case, the number of pulses P1. ! , □7 is the function f(L.

/2 m 14. P3 , T2 , Tc2 ), and the control circuit 4 performs the calculation shown in equation (4) to obtain the pulse number P. Find the value of UT and combine this value with pulse generator 2.
When the current count value P of the number of output pulses matches, it is determined that it is time to cut, and a cutting command is given to the cutting machine 3 to cut the material 5B.

f(L, I!2.r4.P3.T2.Tc2)
Next, the count of the output pulse of the pulse generator 2 is finished, the pulse counting means 300 count data of M4 is reset, and the sixth pulse counting means 36 immediately starts counting the pulse of the output pulse of the pulse generator 2. .

Then, the sensor 8 detects the tip of the next material to be cut and sent from the common running line 7 to the branch running line 6A,
When the output is turned ON, the control circuit 4 finishes counting the number of pulses and sets the final count value of the number of Noculus to P4.

Next, the control circuit 4 calculates the cutting time error T between the actual cutting time and the predicted cutting time Tc2 by calculating the equation 4(5).
d. Add this cutting time error Td to the predicted cutting time Tc2 described above as in equation M(3), and use the addition result as the predicted cutting time Tc2 for cutting the next material.

Thereafter, the control circuit 4 returns the operation from the point where it detects the ON state of the sensor 8, and the material 5 is automatically cut at each set cutting length L, and the branch running line 6A is cut.

They will be allocated alternately to 6B.

In this way, this embodiment includes four sensors 8 to 11,
Using the timer 12 and the generator 2, calculate the actual cutting length, and also calculate the feed ratio 13/P of the materials 5A and 5B, I!, /P3 and the material speed I!3/
T□, I! 4/T2 is actually measured to determine the cutting time error 'rd, and based on this, the child side cutting time TC machining for the next cutting is calculated *
Since Tc is corrected, material 5 is set to off.
Can be accurately cut into lengths. Also, material 5
Since the feed ratio and material speed are actually measured for each cutting, cutting errors can be further reduced.

As described above, according to the automatic cutting device of the present invention, errors in cutting time can be corrected each time, and materials can be accurately cut.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing the configuration of an embodiment of the present invention, FIG. 2 is a schematic diagram for explaining its operation, FIG. 3 is a flowchart for explaining its operation, and FIG. 4 is a configuration of the present invention. FIG.

Claims (1)

[Claims] An automatic cutting device that cuts a long material transferred on a common running line and distributes it to one branched running line and the other branched running line connected to the common running line. , a material feed roll that transports the material in the length direction at a constant speed; a pulse generator that generates a pulse every time the material feed roll rotates; a timer; first and second sensors arranged sequentially at a predetermined interval in the material feeding direction, and third and second sensors arranged sequentially at a predetermined interval in the material feeding direction so as to face the other branch travel line. a cutting machine that cuts the material on the common running line; and a second sensor that starts counting output pulses of the pulse generator when the first sensor detects the leading edge of the material; a first pulse counting means that stops counting the output pulses of the pulse generator when the first sensor detects the leading edge of the material; and a first pulse counting means that starts the timer when the first sensor detects the leading edge of the material; a first for stopping the timer when a second sensor detects the tip of the material;
a timer control means M2 that starts counting output pulses of the pulse generator when the second sensor detects the tip of the material; An arrangement interval of sensors, an arrangement interval of the first and second sensors, a final count value of the first pulse counting means, a final time value when the timer is activated by the first timer control means, and a predicted cutting time. a first cutting control calculating means for calculating the number of pulses corresponding to the set cutting length by performing calculations based on the set cutting length; a first coincidence detection means that generates a coincidence output when the number of pulses matches the number of pulses determined by the cutting control calculating means; and a cutting command to the cutting machine in response to the paper detection output of the first coincidence detection means. a first cutting command means that starts counting the output pulses of the pulse generator when the cutting command is output, and starts counting the output pulses of the pulse generator when the third sensor detects the tip of the material; a third pulse counting means to be stopped, the set cutting length, the arrangement interval of the cutting machine and the first sensor, the cutting machine and the third
sensor arrangement 1... interval, the arrangement interval of the first and second sensors, the final count value of the first and third pulse counting means, and the final count value when the timer is operated by the first timer control means. Perform K based on the time value! 4-, the first cutting time error calculation means calculates the cutting time error between the actual cutting time and the predicted cutting time, and the cutting time error calculated by the first cutting time error calculation means is also calculated. a first cutting time Ila correction means for correcting the predicted cutting time; and a fourth sensor that starts counting output pulses of the pulse generator when the third sensor detects the tip of the material. a fourth pulse counting means that stops counting the output pulses of the pulse generator when the third sensor detects the leading edge of the material; and a fourth pulse counting means that starts counting the output pulses of the timer when the third sensor detects the leading edge of the material a second timer control means that staggers the timer when the fourth sensor detects the leading edge of the material; and a fifth timer control means that starts the calantra of the output pulse of the pulse generator when the fourth sensor detects the leading edge of the material. pulse counting means, a set cutting length, an arrangement interval of the cutting machine and the third sensor, an arrangement interval of the third and fourth sensors, a final count value of the fourth pulse counting means, and the second a second cutting control calculation for calculating the number of pulses corresponding to the set cutting length by performing calculation based on the final time value when the timer is activated by the timer control means and the predicted cutting time; means, second coincidence detection means for generating a coincidence output when the current count value of the fifth pulse counting means matches the number of pulses requested by the second cutting control calculation means; a second cutting command means for giving a cutting command to the cutting machine in response to the coincidence detection output of the coincidence detection means; a sixth pulse counting means that stops counting the output pulses of the pulse generator when the sensor detects the leading edge of the material;
an arrangement interval of the sensors, an arrangement interval of the cutting machine and the third sensor, an arrangement interval of the third and fourth sensors, a final count value of the fourth and sixth pulse counting means, and the arrangement interval of the cutting machine and the third sensor; Based on the final time value when the timer is activated by the timer control means of No. 2, the operation N? e, a second cutting time error calculation means for calculating the cutting time error between the actual cutting time and the predicted cutting time; and a cutting time error calculated by the second cutting time error calculation means. and second cutting time correction means for correcting the predicted cutting time based on the predicted cutting time.