SU369548A1 - TWO-COORDINATED FOLLOWING SYSTEM FOR COPIRO-MILLING MACHINES - Google Patents

Description

one

The invention relates to the field of automatic control and regulation, and is intended for use in servo systems of copy-milling machines.

Known are the following systems for copying and milling stacks, containing a gauging device, a tracking control unit, one input of which is directly, and the second is connected via a rectifier to the output of the copying device, the inputs of which follow and specify feed, which are connected respectively to the outputs of the amplifier and transducer. tracking circuits and tracking control unit settings.

The disadvantage of these devices is that of tracking accuracy when processing products in certain modes.

The difference of the described system is that the tracking control unit contains tracking channel and task channel blocking nodes with reference voltage variators, the engines of which are mechanically connected, and the input of the lock channel node is connected to the copy distributor output, the channel blocking node input is connected to to the output of the copier through a rectifier, and the outputs of the blocking nodes of the tracking channels and tasks are connected, respectively, through an amplifier-conversion tracking schemes and tasks from the input E servo actuators and the desired flow.

This makes it possible to increase the tracking accuracy when processing products.

The drawing shows a functional diagram of the described system, which contains a working body 1 carrying a milling cutter 2, a copier 3, a finger 4, a working body 5 carrying the workpiece 6 and a copier; copier 7, follower feed drive 5, tracking control unit 9, tracking follower amplifier circuit 10, task setting power converter circuit // rectifier 12, feed feed driver 13 tracking channel lock node 14, task channel lock node 15, transformers 16, 17, diodes 18-21, resistors 22.I. Of the shoulders of the bridge circuits of the blocking nodes, transistors 26, 27, bias resistors 28.29, 30, voltage regulators 31, 32, voltage regulators 33, 34.

The described system works as follows.

The copier 7 measures the mismatch of the actual path of the milling cutter 2 with respect to article 6 and the path defined by copier 3, and produces an electrical signal proportional to the mismatch. Next, the error signal through the transformer 16 is fed to the blocking unit 44, from the blocking unit to the amplifying and converting circuit 10, and then to the follower drive 8, changing the tracking speed directly proportional to the error.

In the driver channel, the error signal through the rectifier 12 is fed to the base of the transistor 27 along with the reference voltage of the variator 32, as a result of which the difference between these voltages and the signal at the output of the blocking node 15 is inversely proportional to the error signal at the base of the transistor 27. This output signal acts through an amplifier-converter circuit 11 on the driver 13 of the driving feed, changing the speed of the driving feed in inverse proportion to the mismatch.

Thus, as the misalignment increases, the feed rate increases, the feed rate drops, and the mismatch decreases.

The change in copying speed is carried out by variators 31 and 32, which are mechanically coupled with each other; the values of the reference voltages applied to the transistor 26 and 27 change.

As the copying rate decreases, the reference voltages decrease, the maximum ypOiBCHb of the output voltages of the locking nodes 14 and 15 and the magnitude of the maximum steady-state copy error decrease.

When the copying speed changes, the quality factor remains almost unchanged. The required Q-value of the master and servo channels is established with the help of resistors 28 and 29 at maximum tracking speed.

Subject invention

A two-coordinate track for a copy-milling machine, containing a copying device, a tracking control unit, one input of which is directly and the other through a rectifier connected to the output of the copying device, the inputs of the tracking and setting feed, which inputs are connected respectively to the outputs of the power -conversion tracking schemes and tasks of the tracking control unit, characterized in that, in order to improve the tracking accuracy when processing products, the tracking control unit contains blocking units The tracking channel and the task channel are varied with the reference voltage, the engines of which are mechanically connected, the input of the blocking node of the tracking channel is connected to the output of the copier, the input of the blocking node of the channel of the connection is connected to the output of the copier through a rectifier and the tasks are connected, respectively, via amplifier-converter tracking circuits and tasks to the drive inputs of the following and master feed.

R

0 0/5 I

--- bs -ml