SU816698A1 - Apparatus for controlling chip breaking process at programme control lathes - Google Patents

Description

(54) DEVICE FOR CONTROLLING CRUSHING

PLUGS ON LATHES WITH PROGRAM

MANAGEMENT

the first counter, coordinate control blocks and series-connected unit of the crushing cycle periods, the frequency divider and the trigger, the first output of which is connected to the first voda of the first element AND connected to the second input with the output of the spindle speed sensor and the third input of the trigger connected to the output of the element is NOT, and the second output is connected to the first input of the second element AND, the first pulse distributor, the second counter, the third AND series element connected in series, the OR elements are entered and the second pulse distributor, as well as the setting unit r1mplity, whose input is connected to the output of the frequency divider, the first and second outputs to the first inputs of the first and second counters, the second inputs of which are connected to the corresponding outputs of the first pulse distributor connected to the first input to the second element Both to the second input of the OR element, the second input to the output of the second counter and to the second input of the second pulse distributor, and the third input to the second output of the first counter to the input for the element NO and to the third input of the second pulse distributor, the fourth input of which is connected to the second input of the device, and the outputs to the inputs of the control coordinate blocks, the output of the first element I is connected to the second input of the frequency divider, and the first output of the trigger is to the first input of the third element And / connected by the second input to the third input of the device, and the input of the second element and is connected to the output of the controller through a pulse generator.

The drawing presents a functional diagram of the proposed device,

The device contains a technological command memory block 1, a CNC 2 device, the first element I 3, a spindle speed sensor 4, a spindle 5, a frequency divider, a setting unit for 7 periods of the crushing cycle, a cutter 8, a trigger .9, a third element I 10, an output unit 11 interpolator, second AND 12 element, 13 pulse generator, OR 14 element, second pulse distributor, 15 pulses, coordinate blocks 16 and 1 control, coordinate stepper motors 18 and 19, workpiece 20, Essatchik 21 amplitude, second second and first 23 counters, first distributor 24 pulses, decrypt op 25, the element is NOT 26 and the unit 27 electroautomatics of the machine.

The pulse generator is controlled by e and IM, and the chips are crushed on the machine by a cutter 8.

The device works as follows.

Command to chip control from

 unit 1 provides the permission for the element And 3 for the passage of pulses from the sensor 4 to the input of the divider 6, the division factor of which is determined by the setting device 7. After the specified number of spindle revolutions .5

The output pulse of the divider 6 sets the trigger 9 to one state, in which it blocks the working feed, prohibiting the passage of drive pulses through the element

5 and 10 from block 11. At the same time

blocks element 3 and supplies a resolution to element 12, allowing the pulses from generator 13 to pass through element OR 14 and distributor 15 to blocks 16 or 17 to control stepper motors 18 and 19 depending on which axis {transverse X or longitudinal Z) is machining the part, and spreading. divider 15 reverses direction, i.e. the removal of the cutter 8 from the workpiece 20 begins. The value of the removal is determined by the state of the setting knob 21 of the amplitude of the oscillations of the cut-off and is set by the operator, the setting knob

D 21 records the amount of movement simultaneously in the counters 22 and 23 of the removal and supply of the output signal of the divider 6, the pulses from the generator 13 through the element 12 and the distributor

5 24 are fed to the input of the counter 22 of the value of the outlet. According to the overflow pulse of the counter 22, the distributor 24 switches the pulses to the counter 23 of the supply magnitude and, at the same time, affects the distributor 15, changes the direction of movement of the tool to the opposite, i.e. the cutter begins to enter the part. 0.1 mm before the end of the supply. The decoder 25 reduces the cutter supply, acting on the generator 13, the overflow pulse of the counter 23 through the element NOT 26 returns to its initial state the trigger 9, which blocks the element 12, unlocks the elements 10 and 3, permitting the passage of pulses of the working feed of the cutter along nporpav ie and pulses from the sensor 4 turns of the spindle 5 to the divider 6.

The chip breaking cycle is repeated until the chip breaking command in block 1 of the memory of technological commands is canceled.

0 Chgaksh-way, the reliability of the proposed device is enhanced by crushing chips during processing of delicate viscous materials or on machines with a non-rigid AIDS system, as a result of which the machining performance is increased at frequencies of less than 500 rpm and the durability of the cutting tool is maintained.

Claims (2)

1. French patent 2145314, cl. G 05 B 19/13, published 1973. 2. USSR author's certificate 610613, cl. B 23 B 25/02, G 05 B 19/02, 1976 (prototype).