SU621553A2 - Device for working surfaces with magnetic abrasive powder - Google Patents

Description

one

The invention relates to the treatment of parts with a magnetic abrasive powder in a magnetic field and can be used in mechanical engineering.

By bus. St. No. 315577, a device for surface treatment with a magneto-abrasive powder, made in the form of a rotating core formed by the inner and outer ring poles, in the ring groove of which an electromagnet coil is located. To create magnetic induction hubs to facilitate the process of machining the part, rectangular radial grooves are made on the end working surfaces of the poles.

However, magnetic induction in the gap between the outer pole and the part in this device is significantly less (2-3 times) than in the gap between the inner pole and the part, as a result of which the part is processed by the outer and inner poles with different intensity, which requires additional time processing, and therefore reduces the performance of the installation and degrades the quality of the treated surface.

The aim of the invention is to increase productivity and improve the quality of the surface being treated by leveling the magnetic induction values at the inner and outer poles of the core of the working head. For this, the proposed device for

surface treatment with magnetic abrasive powder is additionally equipped with an electromagnetic coil mounted on the outer surface of the core. Rectangular grooves at the ends of the poles

The cores, which are used to create magnetic induction concentrators in the working gaps, are made at an angle of 30-80 ° to the diameter, conducted through the center of the groove, are directed in the direction of the core rotation and are filled with epoxy resin. In the process of operation of the device, passages are formed in place of the grooves, free of ferro-abrasive powder, which trap coolant

(Coolant) and delivered to the inner cavity between the end of the core and the part. Next, the coolant under the action of centrifugal force percolates through the formed layer of ferro-abrasive powder, incidentally

wetted surface.

FIG. 1 shows the proposed device; in fig. 2 is a view along arrow A in FIG. one.

The device contains a cylindrical

The core 1 is made of a magnetically soft material having an annular groove in which an internal electromagnetic coil 2 is laid. An annular ring separates the end of core 1 into an internal and external annular poles. Outside, on the core 1, a second electromagnetic coil 3 is installed, closed 4. The core 1 is mounted on the metal cutting machine spindle, its machine tool. Power is supplied to both electromagnetic coils through a hollow tapered shank 5 with a nominal current collector (not shown). The inner and outer poles have grooves 6, made at an acute angle a to the diameter and directed toward the side of the core 1. Core 1 is installed so that between the two poles and the workpiece 7, located on a plate of soft magnetic material 8, there is a working gap filled with ferro-abrasive powder 9. To protect the internal electromagnetic coil 2 from the lubricating coolant from being hit, the groove is filled with epoxy resin 10.

During operation of the device, the core 1 is brought into revision. Electromagnetic coils 2 and 3 induce a magnetic field in core 1 so that the outer and inner poles have opposite polarity. At the poles is formed

The joint with the core is an elastic "brush made of ferro-abrasive powder 9, which carries out the processing of the part 7, the latter having translational motion relative to the core 1.

The device allows to increase the productivity of the process and improve the quality of the treated surface.

Claims (1)

Invention Formula A device for surface treatment of magnetic abrasive powder according to ed. St. No. 315577, characterized in that, with in order to increase productivity and improve the quality of the surface being treated by aligning the magnetic induction values at the inner and outer poles of the core of the working head, it is additionally equipped with an electromagnetic coil mounted on the peripheral surface of the core.