SU1024878A1 - System for stabilizing cutting temperature - Google Patents

Abstract

ELECTRONIC STABILITY TEMPERATURE cutting, contains saish lospeyovat epno s6odi onSho datchshs Teii «nepisTypbi, uipitop, sraoyshayuschyy EPE Mate and Yospv1a 5vatesh yo sbotsiyeynye ispopyitepny dyigatoy, sukgkgarukydSh mechanism, aneKtpoynpaBTra & Mylo to {velocities skirt and the working body of the machine, the second input sravnivakshogo epemoyta connected to the output of the temperature setter, the swarm of the summing mechanism is connected to the output of the motor, which is connected with the fact that it contains a voltage limiter , block of amplifiers, first threshold element and sequentially connected second threshold element, drive, converter, code, code converter, convert voltage code, adder, third, threshold element, trigger, key and tool changer, the output of the first threshold element is connected to the second input of the drive, and the input with the input of the second threshold element, with the output of the comparing element and with the input of the district voltage of the voltages connected by the output to the input of the executive engine and to the second input of the sum The mators, the inputs of the amplifier unit are connected to the corresponding outputs of the angle converter – code, and the outputs to the corresponding control inputs of the electric speed box.

Description

The invention relates to aaaptive control systems, in particular, to automatic systems for stabilizing cutting parameters for meta-cutting machines.

Known systems of stabilization of cutting speed and systems for stabilization of cutting power will be taken.

These systems can significantly improve the performance of metal-cutting equipment, but do not allow the maximum use of the capabilities of the tool.

The closest technical solution to the invention is a cutting temperature stabilization system comprising a series-connected temperature sensor, an amplifier, a comparison element and a series-connected executive motor, a summing mechanism, an electrically controlled speed box and a working body of the machine, (The second input of the summing mechanism is connected to the output main engine 2.

A disadvantage of the known system is its limited technological capabilities, which is caused by the narrow range of DC motor control (due to the low rigidity of the motor characteristics), as well as the fact that when the lower control level is reached, the system ceases to stabilize the cutting, i.e. fails to function as an adaptive system .;

The purpose of the invention is to expand the functionality of the system.

The goal is achieved in that the stabilization system contains a voltage limiter, an amplifier unit, a first threshold element and a second threshold element connected in series, an angle – code converter drive, a code converter, a code – voltage converter, a adder, a third threshold element, a trigger, a key and a device tool replacement, the output of the first threshold element is connected to the second input of the drive, and the input is connected to the input of the second threshold element, to the output of the comparing element and to the input of the voltage limiter, connected to the input of the executive motor and to the second input of the adder, the inputs of the amplifier unit are connected to the corresponding outputs of the converting angle - the code, and the outputs to the corresponding control inputs of the controlled speed box.

The drawing shows b ok scheme of the system.

Temperature stabilization system. cutting device contains temperature sensor 1, 5-amplifier 2, comparing element 3, temperature setting device 4, voltage limiter 5, executive motor 6, summarizing Mechanism 7, main engine 8, electrically controlled crust 9 speeds, machine tool 10, first and second threshold elements 11 and 12, drive 13, angle-code converter 14, amplifier unit 15, adder 16, code converter-voltage 17, code generator 18, third threshold element 19, tool replacement device 20, trigger 21, key 22.

When using the system, it is initially set up;

0 threshold elements 11,12 and 19 and voltage limiter 5. This is done as follows. In accordance with the degree of speed control box 9 is selected by the speed control range of the engine 6. In accordance with the range of the characteristics of the engine 6, determine the maximum allowable voltage of its power. Customize this spreader (with

0 + or with -) limiter 5 voltage. As a result,

The output of limiting voltage 5 in absolute value may be less than equal to the setting voltage. The threshold elements 11 n 12 also adjust this voltage, but the element 11 adjusts the voltage with the + sign, and the element 12 adjusts the voltage with the -. The third threshold 19 is adjusted to a voltage corresponding to the minimum allowable cutting speed selected from economic and technological considerations. The operation of the system is carried out in a speedy manner.

The signal from the temperature sensor 1 in the form of thermo-emf through the amplifier 2 supplies the first input of the element 3, where it is compared with the set value of the signal obtained from the setting unit 4 TeN of the controller. The voltage is proportional to the temperature difference in the cutting zone and the set temperature, through the limiter 5, the voltage is applied to the motor 6

drive of the working body 10. The rotational speeds of the engines 6 and 8 are algebraically summed by the mechanism 7 and transmitted to the drive shaft of the controlled gear box 9. Depending on which box clutches are included, the working body 1O of the machine (for example, spinaep) varies with a certain speed. The insertion of one or another combination of clutches is as follows. If the output signal exceeds the set value, it is equal to. The voltage limiter 5 triggers the first threshold element 11 and the drive 13 of the transducer turns the converting angle into place - code 14 in the forward direction. Transducer signals amplified (by amplifiers 15, 152, 15j, include a different type of electromagnetic clutch box 9 speeds, changing its gear ratio in the direction of increasing the speed of the working body IQ and, consequently, in the direction of increasing the cutting temperature. This process occurs before until the temperature of the cutters increases so much that the signal from the output of element 3 decreases to a value equal to the value of the voltage limiter 5. The threshold element 11 is turned off, the converter 14 stops, and the required coupling combination will be included in the speed box 9. The latter, combined with engine operation 6, will ensure the equality of the set and actual temperatures. The second threshold element 12 is triggered when the signal coming from the output of element 3 changes its sign and reaches a value equal to minus setting the voltage limiter 5. In this case, the angle converter 14 — the code rotates in the opposite direction, switching the coupling in the reverse order, the cutting speed decreases, and hence the temperature. As the cutting temperature begins to increase with increasing tool wear, the system tends to compensate for this trend by decreasing the machining speed. With a certain amount of tool wear, continued operation with this tool may not be economically unjustified due to the low cutting speed. Therefore, signals that vary in proportion to the speed change are fed to the inputs of the adder 16 from the output of the 14 rms code converter via the code converter 1 and the code converter 17, the voltage from the output of the voltage limiter 5, are lowered below the permissible level of &; the third threshold element 19 is triggered. In this case, the trigger signal of the threshold element 19 is sent to 21. This signal is stored by the trigger 21, transmitted to the first input of the key 22, and before processing the new part, by command A Device 2O blunt tool change. The expansion of the adjustment range is achieved as follows. The speed control range of the drive, consisting of a speed change mechanism and a speed changeless speed, is InpMB Cs-c, de Dg is the speed change range of the drive using a mechanism (system) of a stepless speed change (in our case, an adjustable DC motor 6); the range of change of the drive speed with the help of the mechanism (system) of the step change of the speeds (in this case, the electrically controlled box of 9 speeds). Then the expansion of the adjustment range when using the proposed system compared to the known one is equal to xg. uD -r; 57 where Dg- is the speed control range of a known system; 1) c is the speed control range of the proposed system. In the known system, the regulation of the DC motor speed is carried out by varying the voltage in the core circuit at a constant torque. In this case, Dgn 10. E to the proposed system, the regulation of the DC motor speed is carried out by changing the motor field at a constant power. The range of this reguprovaniyu Dg 4. The range of adjustment of the speed box, its multiplying structure is determined by the expression Ic where (O is the denominator of a geometric progression; 2 is the number of steps of the box soon? Then for most used electrically controlled gear boxes with, 26; g 9; DC 1 6.3.

$ 10,248,786

The proposed range of air russia airing speed at the wider aiapaaaaaaa control is not (almost 2.5–3 times higher than 4 t 6 6.3 l, about 5% of the range

di t Q - - i, 2 times. o & object) and also provides pa6oi-y

Thus, the pre-installed system-5 of the system within the limits of speeds, due to the stabilization of the cutting temperature of the foam, required by the economist-technologist has higher technological conditions, which is provided

opportunities than known. She pozvo-timely automatic change

It will automatically adjust the sko tool.

Claims (1)

STABILIZATION SYSTEM FOR CUTTING TEMPERATURE, containing a temperature sensor connected in series. Strengthen the comparator and the serially connected actuator, the summing mechanism, the electrically controlled gearbox and the machine tool, the second input of the comparison element is connected to the output of the temperature setter, the second input of the summing mechanism is connected to the output of the main engine, characterized in that, with the whole expansion of the functionality of the system, it contains a limiter amplifiers, amplifier block, first threshold element and second threshold element, drive, hijack code converter, code converter, code-voltage converter, adder, third, threshold element, trigger, key and tool replacement device, the output of the first threshold element is connected to the second the drive input, and the input - with the input of the second threshold element, with the output § of the comparing element and with the input of the voltage limiter connected by the output to the input of the actuator and to the second input of the sums the amplifier, the inputs of the amplifier block are connected to the corresponding outputs of the angle-to-code converter, and the outputs are connected to the corresponding lower control inputs of the electric control SU, “1024878