SU538343A1 - Device for positional control of machine tools - Google Patents

Description

one

The invention relates to the field of automation and computer technology and is intended for positional control of machine tools for drilling boards.

Software control devices are known, comprising a counter-register displacement sensor, input and intermediate information storage bpok, speed setting unit and feed drive 1, 2, 3.

A disadvantage of the known systems is the need for a large amount of equipment, since in them the function of intermediate memory and motion processing control is performed by two separate devices: an input and intermediate memory unit and a register counter.

The closest technical solution to a given invention is a device for positional software control of machine tools, comprising a program input unit connected to a control unit and to trigger registers connected via a control unit to working feed drives connected to motion sensors f4.

The disadvantage of this device lies in the complexity and low speed, because when using a photovoltaic device as the input unit of the program, it is necessary to connect the information storage unit.

The aim of the invention is to simplify and improve the speed of the device.

The goal is achieved by introducing the groups of elements I into the proposed device. The first inputs of the elements AND of the corresponding group are connected to the zero inputs of the corresponding triggers of the previous trigger registers, the outputs to the counting inputs of the corresponding triggers of the subsequent trigger registers. The second inputs of the elements And of all groups are connected to the output control unit, and the counting inputs of the corresponding triggers of the first trigger register - to the displacement sensors.

The drawing is a diagram of the device. It contains the input box of program 1, trigger registers 2 according to the number of tracks of the program carrier used, for example, ierpopents consisting of triggers 3-5

the groups of elements 6, the control unit 7, the sensor 8 and the drilling driver 9, the drives of the working feeds 1O, 11, the displacement sensors 12 and 13 and the delay unit 14.

The device works as follows. In the initial state, the triggers of 3-5 registers are reset. From block 7 to the potential inputs of all elements 6, a prohibition signal is received and closes them.

The movement information is recorded on punched tape in binary code and divided into frames. The fixed frame of the program has four lines: 1 - line - command information to drill or not, direction of movement, 2 - line - information of shifting on X, 3 - line - information of moving on Y, 4 - line - end of frame.

When a signal arrives at block 1, information from the punched tape is fed line by line to the first triggers of 3 registers and the clock from the lead track delayed relative to signals from code tracks is shifted to the next triggers 4 and 5 registers until the block 1 stops by puncturing the end of the frame.

The signal end of the frame enters the block 7, which gives the resolving potential to the elements And 6.

With the help of links between register triggers and And 6 elements, two counters are built: a counter containing triggers of 3 registers with digital information moving along the V axis and a counter containing triggers of 4 registers holding digital information moving along the X axis.

The command information directly from the register 5 trigger enters block 7. It issues a start signal to the actuator drives 1O and 11. As soon as movement begins, sensors 12, 13 give signals to the lower bits of the counters. Counters are starting to work on subtraction. The block analyzes the state of the counters and, when they are zeroed, issues a command to stop the drives of working feeds, a command to drill and to enter the next frame of information. The next frame is entered. B: O, the drilling time, after the spindle returns to its initial position, its working out begins and the cycle repeats. The use of elements And in connection with the triggers of the shift registers for the construction of counters eliminates intermediate memory, thereby reducing the amount of equipment and simplifying the control circuit. The exclusion of information transfer from the intermediate memory to the counter-register, as in the positional software control systems, the number of the pulse type, allows to increase the &

Claims (4)

1. USSR author's certificate No. 344933, M.C.L G O5 B 19 / 14,197 O.g. the USSR 2 Copyright certificate 378810, M.C. G 05 B 19 / 30,1971, 3. US patent number 366693O, 235-151. 11, 1972. 4. USSR author's certificate No. 267303, M.C. G. 05 G. 7/52, 1968