SU986721A1 - Apparatus for controlling multicycle feed of work by measured length - Google Patents

Description

(54) DEVICE FOR CONTROLLING MULTICYCLES OF PERMITTED PRODUCTS AS A MEASURED LENGTH

The invention relates to the processing of metals by cutting, in particular, to a control system for cutting pieces of measuring length.

A device is known comprising a program instruction unit connected in series, a position control unit with two outputs, a logic circuit with three outputs, an actuator, an actuator position meter and a block of stroke numbers of movement devices of article 1J.

The disadvantage of this device is the low accuracy of advancing to a measured length due to the accumulation of errors in the summation of movements at intermediate points. ;

The purpose of the invention is to improve the accuracy of the promotion of products.

The goal is achieved by the memory block with two inputs, the first input of which is connected to the second output of the block, the position control, and the second input to the third input of the control logic circuit.

The drawing shows a block diagram of the device.

 . The device consists of a program setting block 1, a position control unit 2, the first input of which is connected to a program setting block, a control logic circuit 3, the input of which is connected to the first output of the control unit {position 2), a trapping device

4, and the use of a mobile displacement device 5 connected respectively to the first and second outputs of the logic control circuit. The Auger 6 meter is connected to the actuation device re1 | price

15

5, the output of which is connected to the second PSM input of the position control unit 2. Memory block 7. It has two inputs connected by cooTBertcTBeHHo with the third output of the logic circuit

20, control 3, and a second output of the position control unit 2, and an output connected to the third input of the blocks2.

Control logic circuit 3 co. holds logic elements and sensors

25 end positions and movements of Niehanisms.

It converts the information from the position control unit 2 and the end position sensors — into commands,

30 which drive the capture and transfer actuators and control the process of rewriting the measured movement value from the motion control unit 2 to the memory block 7. The device works as follows .. In the program setting block 1: enter the specified measured length of the product arrives at the first input of the position control unit 2. One of the extreme positions of the actuator of the movement 5 is taken as the zero reference point of the position meter b.

 In the initial state, the zero value received at the third input of the block 2 is written to the memory block by means of the control logic 3.

Block 2 subtracts from the specified dimensional length the value recorded in memory 7 ,. and carries out the positioning of the actuator movement 5 to the desired point by sending commands through the control circuit 3.. :.

as a result, in the initial state, block 2 determines the amount of displacement numerically equal to the specified dimensional length of the cut product, since values equal to zero are supplied to its second and third inputs.

If the given dimensional length is cut-. If the item is longer than the possible movement of the actuator, the positioning point will lie outside of its stroke, and the first movement is performed at the maximum possible stroke of the actuator. After the movement, the logic circuit 3 gives a command to capture the product and overwrites the measured value of the movement from block 2 to memory block 7, after which the actuators of the gripper 4 and movement 5 are returned to the initial state. In this case, the output of the memory unit 7 to the third input of the position control unit receives a number equal to the value of the previous move of the device 5. Therefore, in the extreme (zero) position of the device 5, the block 2 determines the displacement amount numerically equal to the difference between the specified product length and the value previously after the opening of the gripping device 4, the device 5 will position the feed mechanism by a length shorter than a predetermined dimensional length of the cut product.

If the predetermined amount of movement of the product is greater than the twice or more possible movement of the device 5, the cycle is repeated until the positioning point is within the limits of the possible movement of the device 5.

 Then block 2 will position the device 5 to the desired point. Overwriting information in the block: 7 in this case does not occur. After returning the feed mechanism to its original position in memory block 7, control value 3 records a zero value.

The proposed control device. neither allows

- to improve the accuracy of movement of the product by eliminating the accumulation and summation of the error by measuring the actual amount of movement in each cycle and eiBTomatic measurement, taking into account the magnitude of subsequent movements,

- to increase the reliability of work due to the absence of a predetermined required amount of movement of the filling device

- expand technology (: and € equipment capabilities by using one register in the memory block, regardless of the feed rate.

Claims (1)

Invention Formula A device for controlling a multi-cycle movement of a product to a measured length, containing a sequentially connected program block, a control block with two outputs, a logic circuit with three outputs, an actuator and an actuator position meter and a memory block, etc. e with the fact that, in order to improve the accuracy, the block: the memory is made with two inputs, with its first input connected to the second output of the position control unit, and the second input to the third output of the control logic circuit neither; . Sources of information taken into account in the examination, 1, USSR Copyright Certificate 867608, cl. On 23Q 7/04, 1980.