SU1696183A2 - System for measured cutting of long articles - Google Patents

Description

pulses with the second inputs of the code generator and the second element OR, the output of the second counter is connected with the second trigger input, and the output of the AND element - with the third outputs of the first counter and the code generator, the output of which is connected to the fourth input of the first counter, in addition, the code generator contains trigger, pulse generator, element And and the counter, the output connected to the reset trigger input, the output of the latter and the output of the pulse generator through the element And is connected to the first input of the counter, the second input of the counter, The trigger input and the third counter input are the first, second, and third inputs, respectively, and the output of the AND element is the output of the code generator.

The known system of dimensional cutting is intended for dimensional cutting of the endless product and automatic cutting of a product defect, orienting it to the end of the finished product.

However, when using this known system for cutting the product on aggregates with a finite length of the item being cut, for example, when no-rolled pipe is manufactured, the product is obtained in an arbitrary length, including less than the minimum, which, firstly, reduces the quality of the product, secondly, creates an emergency situation on the unit, since with a cut product with a length less than the minimum allowable for technological requirements, it may be stuck in the process line.

The aim of the invention is to improve the quality of products and the elimination of emergency situations on the production line.

The goal is achieved by the fact that the end-of-product sensor, the second pulse shaper, and the OR element, the output of which is connected to the first trigger input, are firstly connected to the output output of the product defect sensor, and the second input through the shaper of the product pulse is connected to the sensor output end of the product.

The proposed system is characterized by the presence of a sensor for the end of the item to be cut, a second pulse former and an OR element in conjunction with the rest of the circuit elements.

The newly introduced elements are known, but when they are introduced in conjunction with the rest of the circuit elements, these nodes exhibit new properties, which leads to an increase in the quality of products and the elimination of emergency situations on the production line.

The drawing shows a block diagram of the system of dimensional cutting of the product.

The diagram contains scissors 1 for cutting the measured lengths of the lengthy product 2,

associated with the first output of the position regulator 3, the sensor 4 of moving the product 2, mechanically coupled to the follower roller 5, connected to the input of the converter 6 of the sequence

0 pulses, the output of which is connected to the third input of the regulator 3 and the input of the pulse frequency divider 7, the output of which through the element 8 is connected to the third inputs of the first counter 9 and forms 10 5 codes, the first input of the regulator 3 through the selector 11 is connected to the output The first setter 12 of the code, the second group input of the selector 11 is connected to the group output of the first counter 9, the third input of the selector 11 is connected to the second input of the element OR 13, the input of the first shaper 14 pulses, the second input of the second counter 15 And 8 and connected to the trigger output 16, sensor 17

5 defect of the product 2, the first delay element 18, the second code setting unit 19, the second delay element 20, the second input of the trigger 16 is connected to the output of the second counter 15, the second output of the regulator 3 is connected

0 with the second input of the imaging unit 10, with the first input of the second counter 15 and through delay elements 18 and 20, respectively, to the inputs of the elements of the first 13, second OR 21, whose outputs are connected respectively to the second inputs of the positioner 3 and the first counter 9, to the first and the fourth inputs of which are connected to the code setting device 19 and the output of the code generator 10, respectively, the first input of the code generator 10 is connected to the output of the driver of 14 pulses and the input of the second element OR 21.

Regulator 3 is structurally connected in series.

5, the counter 22 and the scissors controlling unit 23.

The output of block 23 and the output of counter 22 are the first and second outputs of controller 3, respectively, D input, V input and

The 0 T-in (subtracting) are the first, second, and third inputs of controller 3, respectively.

Shaper 10 code contains a trigger 24, a generator of 25 pulses, the element And

5 26, the counter 27, the output of which is connected to the setup input of the trigger 24, the output of the latter and the output of the generator 25 through the element 26 is connected to the second input of the counter 27, one of the inputs of the trigger 24, the first and third inputs of the counter 27 are respectively the first, second and the third inputs, and the output element And 26 - the output of the imaging unit.

The selector 11 constructively includes the AND 28, 29, OR 30 group elements. The output of the OR element 30 is the output of the selector 11, the AND 28 group element is connected to the first group of inputs of the OR 30 element, the And 29 group element is connected to the second group of inputs, The inputs of the And 28, 29 elements are the first and second inputs of the selector 11, the third input of which is the enable (inhibit) inputs of the And elements 28, 29.

Defect 31 of article 2 is detected by sensor 17.

Series connected to the sensor 32 of the end of the product 2, the pulse shaper 33 and the element OR 34 through the output of the latter are connected to the first input of the trigger 16, the second input of the element OR 34 is connected to the output of the sensor 17.

As the sensor 4, the movement of the product 2 can be used, for example, a 2P.984.009 TU-3 pulse sensor.

The Converter 6 of the sequence of pulses can be performed, for example, according to a known technical solution.

As a defect sensor 17, for example, a flaw detector of type VD41N TU 25-06 can be used. 1692-74.

Pulse delay elements 18 and 20 serve to coordinate processes over time. Moreover, the delay time of the pulse delay element 20 should be about 2 times longer than the delay on the delay element 18.

As the sensor 32 of the end of the product can be used, for example, a photo sensor type FRSU TU 36.1760-84 or a brush electric sensor.

The remaining elements and components of the system can be implemented on the basis of typical IC series, for example, K155, K176, K 561, etc.

The defect sensor 17 is mounted from the cutting axis of the scissors 1 in order to move the product 2 at a distance of

O | min I - ,. 1 max

/ LM s L-D: s LM

where LMMHH, LMMaKC is the minimum and maximum length of the finished products, respectively.

Moreover, in practice, their values are related to

I max oi min

LM LM

In general, the length of the product beyond the axis of cutting scissors (in the direction of movement of the product 2)

g f - max U S (/ S LM,

and the distance from defect 31 of product 2 to the cutting axis of scissors 1 is fm.

The sensor 32 is installed coaxially with the sensor 5 com 17.

The system works as follows. In the initial state (conditionally accepted for the convenience of considering the processes occurring) in controller 3 from the output

0, counter 22, a RES command is issued, by a signal of which unit 23 starts scissors 1 cutting the finished product of a certain length (determined by the job recorded at input D in counter 22);

5, through the delay elements 18 and OR 13 to the V input of the counter 22, information from the output of the selector 11 (the element OR 30) is recorded into it; impact through delay elements 20 and OR 21

0 to the V-input of the counter 9, the constant d / 2 is written into it from the output of the setpoint 19; the counter 27 is set to zero in the driver 10 of the code.

Trigger 16 and trigger trigger 24

5 10 codes are in the initial state, in which in the selector 11 the group element And 28 is open and the group element And 29 is closed; the counter 15 is kept in the initial 4th zero state; the element I (8 is open; in the shaper 10 of the code, the element i 26 is closed (the pulses produced by the generator 25 do not pass to the output of the element i 26).

The product 2, moving along the technological line (indicated by an arrow in the drawing), provides with the help of the follower roller 5 and the sensor 4 the output of a sequence of pulses proportional to the number of pulses to the amount of movement

0 products. The sequence of pulses from sensor 4 passes through the pulse sequence converter block 6 (the price of each pulse is converted to a typical unit of length, for example, 1 mm,

5 1 cm, 1 dm, etc.) enters the regulator 3 at the subtractive input of counter 22 and through divider 7 into two and the open element AND 8 passes to the subtractive input of counter 9 and at the third input of the shaper 10 of the code (summing input counter 27).

At the same time, if there is no defect 31 on product 2, then the signal REZ from the output of counter 22 of regulator 3 will record information about the measured length from the output of setting 12, and to counter 9 - constant from the output of setting 19.

The pulses of the length of the product 2 that enter the regulator 3 to the subtracting input of the counter 22 provide for the subtraction of previously recorded information before zeroing, at which the RES command is issued and the auxiliary operations described above will be performed.

In the counter 27 of the former 10, P / 2 information is formed between the snow commands REZ from the output of the counter 22.

In counter 9, in this case, a task is generated for counter 22 in the event that the first of two finished products of the same length is cut when the sensor 17 detects a defect 31 of product 2,

This assignment is determined from the following prerequisites. At the time the sensor 17 detects a defect 31, the length of the product from the defect (i.e., sensor 17) to the front end of the product, located behind the cutting axis of the scissors 1, is generally equal to the sum (LA + f). According to the proposed algorithm, this length should be divided in half, thereby ensuring the orientation of the defect at the end of the finished product,

Since at the time of detection of the defect, the information in the counter 22 should be replaced by a new task (instead of dimensional cutting, the product should be cut according to the Defect signal), and the product length beyond the cutting axis of the scissors 1 is equal, obviously, the task to cut the product from the Defect signal will be

i + E p-U-fr

--- I- task and is formed by the counter 9.

The process of dimensional cutting of the product will be carried out by the described method until the occurrence of defect 31 of product 2 in the zone of sensor 17.

Upon receipt of a signal, the Defect from sensor 17 through the OR element 34, the trigger 16 is set to the state in which the AND 28 element is closed in the selector 11 and the AND 29 group element is opened, and the information from the OR 13 element is recorded in the counter 22 of the regulator 3. (task for cutting off the first product of two of the same length by the signal Defect); element 8 is closed; from the output signal 1 of the flip-flop 16, the shaper 14 is started, the short signal of which, having passed through the OR element 21, records the constant to the counter 9 from the output of the setter 19; a restraint is lifted; nor counter 15 in the initial zero state.

In the shaper 10, the signal 1 from the output of the trigger 24 opens the element And 26, providing with the help of the pulses of the generator 25 a census of information from the counter 27

(half of the length () in counter 9. Upon completion of the census of this information by an overflow pulse from the output of counter 27, trigger 24 returns to its initial state, the AND 26 element is closed to pass generator pulses 25,

Thus, after the sensor 17 detects a defect on the product 2 in the counter 22

L - f will be information. And in the counter 9

U + J 2

The incoming pulses of the product length to the subtractive input of the counter 22 provide for its zeroing and outputting the RES signal (the first after the arrival of the Defect signal), which, using block 23 and 1, causes the first finished product to be cut off by the Defect signal; at

counter 15 records the number using delay elements 18 and OR 13 writes information to counter 22 from counter 9; sets counter 27 of driver 10 to its initial state; using delay elements 20 and OR 21, provides counter 9 with a constant record from the output of setpoint 19.

Continuing to arrive at the subtracting input of the counter 22, the pulses of the length of the product 2 provide for zeroing it and issuing the RES command, using which by means of the controller 23 of the regulator 3 and scissors 1 the second finished product is cut off by the Defect signal; by counter

15 counts the second unit (the second finished product after the arrival of the Defect signal), at which, by the overflow signal of the counter 15, the trigger 16 returns to the initial state, providing

switching elements And 28, And 29, And 8 on the dimensional cutting of the product; counter 27 is zeroed; the meter 22 records information about the measured length of the product from the output of the unit 12; The counter 9 records a constant from the output of the setter 19. At this cutting of the product by the signal Defect ends and a measured cut of the product 2 begins.

Cutting the product 2 in the case of

its end to the zone of the sensor 32 is produced as follows.

A voltage drop at the output of sensor 32 triggers the shaper 33, at the output of which a short pulse is generated, which arrives at the second input of the OR 34 element. After passing through the OR 34 element, this pulse converts the trigger 16 to a state corresponding to the state of the system

Defect signal, and the system will have the processes described when considering the behavior of the system when the Defect signal arrives,

The proposed system of dimensional cuts ensures the orientation of the defect at the end of the finished product; the length of the finished products is not less than the minimum allowable dimensional lengths; increased cutting accuracy; exception of an emergency on the production line in case of abnormal cutting of the end product, when the remainder of the product may be less than the minimum allowable length.

0

Claims (1)

Invention Formula System of a measured cut of a product on an auth.St. No. 1542705, characterized in that, in order to improve product quality and eliminate an emergency, a sensor for the end of the product, a second pulse shaper and a third OR element, the output of which is connected to the first trigger input, are added, the first input of the OR element is connected to the output of the defect sensor product, and the second input through the second pulse shaper connected to the output of the end sensor.