SU335893A1 - Method of orientation of non-magnetic conductive parts - Google Patents

Description

The invention can find application in the orientation of large parts, where the cost of power is very significant.

A known method of orientation of nonmagnetic conductive parts in a pulsating magnetic field. However, in this field, in order to achieve a high accuracy of orientation, especially large details, a large value of the magnetic field is necessary.

The proposed method is characterized in that the phases of the currents feeding the magnetic system and the drive of the vibrating channel are shifted until the maximum negative accelerations of the vibrating channel are combined with the maximum values of the moment of the electrodynamic forces.

This allows parts to be oriented at very low values of induction and low power of the device, since the value of magnetic zero induction is reduced by more than two times. In addition, when the tray vibrates continuously, the orientation accuracy is increased several times with the same values of the field induction.

FIG. 1 shows a scheme for implementing the proposed method; in fig. 2 - curves explaining the method.

that, ie, in the orientation zone. When the field is on, the part 1 is affected by the moment M and the vibrating movement of tray 2.

If we denote the frequency of the field with, then the magnetic moment Lm of the part will also vary with the frequency (O, and since the mechanical moment M is the product of PMH. Where B is the induction field, then M has twice the frequency 2с. Vibrator fed by, for example, a sinusoidal current, the tray causes the vibrating motion to be also doubled in frequency.

currents ensure coincidence in time of the maximum (in absolute value) value of the orienting moment M with the maximum negative value of vibration acceleration a. In this case, if the vibration mode is close to the separation mode, then at the time points corresponding to the maximum negative values of vibration acceleration (a), the torque of the friction forces will be close to zero.

Since at the same time points the moment M reaches the greatest values, it follows that the part can be oriented at very small values of induction. The same circumstance provides the invention

The method of orientation of non-magnetic conductive parts on the vibrating channel by applying an external pulsating magnetic field on them, characterized in that, in order to reduce the power of the magnetic system, the phases of the currents feeding the magnetic system and the vibrating channel drive shift the maximum negative accelerations with the maximum torque values of the electrodynamic forces.