SU482725A1 - Device for correcting equidistant in phase numerical control systems - Google Patents

Description

The invention relates to the field of machine tools and can be used in machine tools with a nano-program control.

A device for correcting equidistants in numerical program-control phase systems is known, comprising a control unit, the first output of which is connected to an executive motor mechanically connected to the feedback sensor, and the second output to the input of the feedback sensor. The output of the feedback sensor is connected to the input of the maximum transformer. The output of which is connected to the input of the control unit.

The purpose of the invention is to improve the accuracy of the device.

This is achieved by introducing a secondary motor and a unit for setting the tool size, the input of which is connected to the third output of the control unit, and the output to an additional electric motor mechanically connected to the rotating transformer.

The drawing shows the scheme of the proposed device for correrection of equidistants in phase software control systems.

It consists of a control unit 1, a unit 2 specifying the tool size, a rotating transformer 3, a feedback sensor 4, an executive motor 5, a switch 6,

additional motor 7, handles 8 manual control.

Unit 1 is made of an amplifier 9 of a rotating transformer, an amplifier 10 of power, a phase discriminator 11, an amplifier 12 of a working signal, an amplifier 13 of a feedback signal; magnetic heads 14 and magnetic tape 15.

The instrument size setting unit 2 contains a power amplifier that amplifies the working signal of the control, and a magneto amplifier that controls the speed of the additional motor 7.

The rotary transformer 3 is designed to introduce a correction for a given equidistant change, this change in equidistapta can occur by hand, through the handle 8 or automatically through the unit 2 specifying the tool size and the additional motor 7.

A device for correcting equidistants in phase numerical control systems works as follows.

If the processing of the part is carried out by means of an equidistant size specified by equidistant, then the switch 6 turns off the unit 2 and the motor 7.

From control unit 1, sinusoidal signals — an amplified operating signal and an amplified reference signal — come simultaneously from two magnetic tape tracks.

The feedback signal amplifier 13 energizes the feedback sensor 4, the rotor of which is apnematically connected to the "controlled coordinate of the machine tool through the executive motor 5. The reference sigal from the feedback sensor goes through the rotating transformer 3 without change, as it is not rotates, switches to the control unit 1 and, after passing through the amplifier 9 of a rotating transformer, is connected to one of the inputs of the phase discriminator 11, which is in the nerve approximation a multiplying device. To the other input of the phase discriminator, an amplified working tool is fed.

As a result of the summation of these signals at the output of the phase discriminator, an error signal is produced following its drive. This signal is further amplified by the power amplifier 10 and is connected to the engine S. of the machine tool, which tends to set the coordinate to such a level when the error signal is equal to or close to zero. At the end of machining, the tool moves back to its original position and the machine shuts down.

For the correction of equidistants, the technological necessity of a larger or smaller size of the cutting tool, block 2 and the electric motor 7 are connected to the switch 6 with a switch. Using the control element of the magnetic amplifier, the necessary correction is set to equidistant. Adjust the initial position of the tool, after which the machine include and begin processing parts.

From the control unit 1 at the same time, the same sinusoidal signals — the working amplified signal and the reference amplified signal — are from the two lanes of the magnetic tape simultaneously.

The on-signal signal amplifier (feedback amplifier) feeds the feedback sensor, the rotor of which is diametrically connected to the "controllable coordinate of the machine tool through the executive electric motor 5. Its input and output through the rotation of the transformer 3 changes equidistants.

Without correction, the equidistants amplified signal of the follower drive error from the power amplifier 10 is supplied to the executive motor 5 of the working body assembly, which tends to set the controlled coordinate to a position where the error signal is equal or tends to zero.

At the same time, the same amplified follow-up error signal from the power amplifier is fed to the tool-sizing unit. The control signal from the iOB control by the magnetic amplifier rotates an additional electric motor, which rotates the rotating transducer and corrects the tracking signal of the tracking pattern plus or minus depending on the set rotation of the drive. The percent correction of the equidistants is set such that the total mismatch between the rotating transformer and the feedback sensor is within the capabilities of the phase discriminator.

The corrected sigpal error from the rotating transformer enters unit 1 and through the amplifier of the rotating transformer is fed to one of the inputs of the phase discriminator, which is essentially a multiplier device. Pa another input of the phase discriminator is supplied with a working amplified signal from a magnetic tape. As a result of the summation of these signals, the output of the phase discriminator receives the signal of the corrected error of the tracking device. Further, this signal is amplified by the power amplifier and arrives at the executive motor of the machine tool, which tends to set the controlled coordinate to a position where the error signal is equal to or tends to zero.

Subject invention

A device for correcting equidistants in phase numerical control systems containing a control unit, the first output of which is connected to an executive motor mechanically connected to the feedback sensor, the second output connected to the input of the feedback sensor whose output is connected to the input of a rotating transformer, output which is connected to the input of the control unit, characterized in that, in order to increase the accuracy of the device, it contains an additional electric motor and a size setting unit A tool whose input is connected to the third output of the control unit and the output to an additional motor mechanically connected with a rotating transformer.