JPS591160A - Device for magnetically polishing flat surface of work - Google Patents

Abstract

PURPOSE:To efficiently carry out flat surface-polishing, by arranging a plurality of magnetic pole pieces for constituting N-poles and S-poles, in concave and convex shapes, and by providing a non-magnetic material at the convex parts of each magnetic pole piece so that magnetic abrasive is concentrated at the concave part of the magnetic pole piece. CONSTITUTION:In a tool made of magnetic material, six magnetic pole pieces 2 in a dog-leg shape for constituting N-poles and S-poles are circularly positioned, and therefore, arranged in concave and convex shapes, the convex part 3 of each magnetic pole piece 2 being provided with a non-magnetic material 4. The tool 1 is attached by means of bolts 10 to an iron core which is integrally secured to a yoke 5 by bolts 6 and around which a coil 12 is wound. In the case of a non-magnetic work 14, a supporting bed 15 is secured to a table 18 with non- magnetic materials 17 being interposed therebetween, so that a gap 16 is defined between the flat surface of the work 14 which is set on the supporting bed 15, and the convex parts 3 of the magnetic pole pieces 3. Meanwhile, in the case of a magnetic material work 14, the work 17 is set on the table 18 with the non- magnetic materials 17 being interposed therebetween.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for magnetically polishing the plane of a workpiece.

A machine tool and method for polishing workpieces is disclosed in British Patent Specification No. 1,370,356. However, according to what was disclosed in the British Patent Specification 1, the tool was divided into north and south poles, and the workpiece was rotated by sandwiching the workpiece between the north and south poles. . Therefore, the technique disclosed in the British patent specification has the disadvantage that it is useless as a machine tool for magnetically polishing the flat surface of a workpiece.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an apparatus for magnetically polishing the plane of a workpiece using a group of tools.

Still another object of the present invention is to combine the tool into one magnetic pole piece without dividing it into north pole and south pole, and to arrange a plurality of magnetic pole pieces in a concave and convex shape. An object of the present invention is to provide an apparatus for magnetic polishing.

These and other objects and advantages will become apparent from the detailed description of embodiments of the invention and the accompanying drawings.

In FIG. 1, a tool 1 is made of a magnetic material, for example SS41, and has dogleg-shaped magnetic pole pieces 2 that constitute kJ poles and S poles.
As shown in Figure 2, 6III! J They are arranged in a circular pattern and arranged in an uneven pattern, and a non-magnetic material such as brass 4 is arranged on the convex part 3 of the valley pole piece 2, that is, on the boundary between the N pole and the S pole. Tool 1
is integrally attached to the yoke 5 with bolts 6, and is attached to the iron core 7 with a bolt 10 passing through a hole 9 in the central part 8, so that the peripheral part 11 and the central part 8 of the tool l are in contact with the yoke 5 and the iron core 7. The state will be as follows. A coil 12 is wound around the iron core 7. If the workpiece 14 is a non-magnetic material, the workpiece 14 is mounted on a support base 15i made of a magnetic material, for example 5S41, and is removably fixed. The support base 15 is fixed to the table 18 via the non-magnetic material 17 so that a gap 16 is formed between the flat surface 14a of the workpiece 14 and the convex portion 3 of the magnetic pole piece 2. When the workpiece I4 is a magnetic material, the workpiece 14 is a non-magnetic material 17.
It is placed on the table 18 via the holder and removably fixed.

The table 18 reciprocates left and right. In some cases, the table 18 may be moved left and right or in a right-and-left direction while reciprocating left and right.

The magnetic flux ψ is generated from the N pole of each magnetic pole piece 2 to the convex portion 3 as shown in the figure.
, passes through the gap 16, the workpiece 14, and a part of the support base 15, turns around, passes through the workpiece 14, the gap I6, and returns to the south pole.

Therefore, the magnetic abrasive grains inserted into the gap 16 are connected along the magnetic flux ψ emerging from the convex portion 3 of each magnetic pole piece 2, and are held against the plane 14a of the workpiece 14.

Under these circumstances, the rotating shaft 13 should be connected to the appropriate rotating body 20.
By holding and rotating the workpiece 14 at the same time and moving the workpiece 14 by reciprocating the table 8, the flat surface 14a of the workpiece 14 is
is polished.

In Figure 3 (a), the workpiece is made of stainless steel (SUS304
) Made of 1, 51nrn thick, width 100mm, length 400m
Figure (b) shows the pre-processed surface ← Nando paper finished surface).
indicates the finished surface after 30 paper processing, gap 14 is 0.7W
J rotation speed is 120m/nuA% table reciprocating speed is 5
00 m/mix, stroke 2 Q rrL/min
It is.

FIG. 4 shows a modification of this invention.

The depth of the magnetic flux ψ crossing the gap 16 changes depending on the amount of brass 4 arranged at the boundary between the north and south poles.

Therefore, as shown in Fig. 4, when the amount of brass 4 is arranged at one dragon width, the magnetic flux ψ1 exits from the convex part 3 from the N pole of each magnetic pole piece 2 and is processed. It reverses near the plane 14a of the object 14 and returns to the S pole.

The magnetic pole piece 2 is not limited to the dogleg shape as long as it has a convex portion 3 that is the boundary between the north pole and the south pole. It is still sufficient to have a plurality of magnetic pole pieces 2.

As explained above, the present invention includes a tool in which a plurality of magnetic pole pieces constituting N and S poles are arranged in a concave and convex shape, and a non-magnetic material is arranged on the convex part of each magnetic pole piece. The effect is that the magnetic abrasive grains are concentrated on the convex portion of the magnetic pole piece, resulting in efficient surface polishing.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional front view showing an embodiment of the present invention, Fig. 2 is a plan view taken along the line ■-■ in Fig. 1,
FIG. 3 is a diagram showing surface polishing performed by the apparatus shown in FIG. 1, and FIG. 4 is a partially sectional front view showing a modification of the invention. 1... Tool, 2... Magnetic pole piece, 3...
Convex portion, 4...brass, 5...yoke,
7... Iron core, 12... Coil, 1
3...Rotary axis, 18...Table. Agent Patent Attorney Akira Watanabe Second Act 3V Kume d

Claims (1)

[Claims] 1. A tool is provided in which a plurality of magnetic pole pieces constituting N and S poles are arranged in an uneven pattern, and a non-magnetic material is arranged on the convex portion of each magnetic pole piece. A device that magnetically polishes the flat surface of the workpiece by holding magnetic abrasive grains against the flat surface of the workpiece and rotating the tool and moving the workpiece. 2. An apparatus for magnetically polishing a flat surface of a workpiece according to claim 1, wherein the plurality of magnetic pole pieces are arranged in a circular manner. 3. An apparatus for magnetically polishing a flat surface of a workpiece according to claim 1, wherein magnetic flux is emitted from the convex portion of the magnetic pole piece.