SU145430A1 - Apparatus for obtaining a predetermined cutting tool feed rate - Google Patents

Description

Devices are known for obtaining a predetermined feed rate of a cutting tool in a digital program control system, comprising a time register, a pulse decoder, a delay line, and a clock generator. However, the accuracy of such devices is insufficient.

In the described device, a multi-digit binary counter is used to increase the time accuracy of working out linear sections of arbitrary length, into which an additional code specified by the time register is entered simultaneously with each output overflow pulse through a pulse decoder.

The drawing shows a block diagram of the device.

A device for obtaining a predetermined feed rate of a rezhush, its instrument by setting its mixing time at certain linear sections consists of a register / time, pulse decoder 2, delay line 3, coincidence circuits 4, multi-bit binary counter 5, serving them for exact time setting a test, a decimal counter 6, a combination circuit 7, a match circuit 8 and 9, a trigger 10, intended for a coarse timing, and a clock generator 11.

The time spent on the plot is entered in coded form from the perforated tape into the register / time and into the trigger 10. The impulse from the generator 11 enters the schemes 8 vi 9 matches, one of which is closed depending on the position of the trigger 10. If the circuit S is closed, the pulses pass through the circuit 9, and their frequency does not change. Otherwise, they are passed through decimal counter 5, after which the frequency of the pulses is divided by the number of times multiple of ten, depending on the number of decades of counter b, and the time spent on working the area increases by the corresponding number of times. Through the combining circuit 7, the pulses arrive at the input of the counter 5, the maximum

conversion factor of which depends on the number of bits in the input. The overflow pulse of the counter 5 is fed to the delay line 3, and from it to the coincidence circuit 4, some of which are open in accordance with the time code. From open circuits 4, the pulses enter the decoder 2, which introduces an additional code into counter 5, corresponding to the difference between the total value of the counter 5 and the conversion factor. After the number of pulses arrives at the input of the counter 5, which is equal to the recalculation coefficient, the counter 5 emits an overflow pulse again, etc. This will occur until the code in the time register 1 changes. Then after some time, determined by the line 3 of the delay, the overflow pulse again hits the matching circuit 4 and in accordance with the new code value enters the corresponding number into the counter 5.

The described device allows to obtain the values of working time with any degree of accuracy, increase productivity and simplify the programming of the operation of the metal cutter 1, of their machines.

Subject invention

An apparatus for obtaining a predetermined cutting tool feed rate in a digital program control system, comprising a time register, a pulse dephaser, a delay line and a clock pulse generator, characterized in that, in order to improve the time accuracy of linear sections of arbitrary length, it uses a multi-bit binary a counter into which an additional code, specified by the time register, is entered simultaneously via the impulse descrambler simultaneously with each output overflow pulse.