RU1808610C - Magnetic plate - Google Patents

Abstract

Usage: mechanical engineering, for fixing ferromagnetic parts during their processing on metal cutting machines. SUMMARY OF THE INVENTION: a plate comprises a housing 1 made of magnetically soft material, control windings 5 with cores, poles 7, 8, 9, isolated from each other by non-magnetic material and made in a T-shape in cross section, Between the poles are arranged with alternating polarity non-remagnetizable permanent magnets 11. The cores are made in the form of remagnetizable permanent magnets 4 mounted on the body with the same poles. In this case, one part of the poles is in contact with the walls of the housing, and the other part is in contact with the cores. To fix the part 16 on the surface of the plate, a direct current pulse is transmitted through the control windings 5, which magnetizes the magnets 4 in a unipolar manner relative to the poles in contact with them. 7 silt, Yo

Description

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The invention relates to machine tools and general engineering and can be used to fasten ferromagnetic parts with a wide range of sizes, including small and thin, when machining them on metal cutting machines.

The aim of the invention is to increase the reliability of fastening ferromagnetic parts with a wide range of sizes, including small and thin ones.

In FIG. 1 shows a plate, a general view of FIG. 2 - the same, top view; in FIG. 3 is a section AA in FIG. 1 (off position); in FIG. 4 - the same (position On); in FIG. 6 - the same (position On); in FIG. 7 is a section BB of FIG. 1 (Disabled position).

The magnetic plate consists of a magnetically flexible material open on the upper side of the trough-like housing 1, at the bottom of which are installed between its central 2 and lateral 3 poles permanent vertically directed magnetizable magnets 4 of magnetically hard material with control windings 5 mounted on them, wound on insulating frames 6, open and located in the transverse direction of the poles 7, 8 and 9, isolated from each other by non-magnetic material 10.

In this case, the poles 7 with their protrusions contact with the upper parts of the permanent magnetizable magnets 4, and the poles 8 and 9 with their protrusions contact with the upper parts of the poles 2 and 3 of the housing 1.

In addition, the poles 7 and 8 are in cross section of an inverted T-shape with parallel side surfaces of the ribs and bases, and the extreme poles 9 are in cross section of an inverted L-shape with parallel side surfaces of the ribs and bases, with side protruding parts of the bases, of the extreme heaters 9 face the lateral protruding parts of the bases of the adjacent poles 8.

Between the ribs of the poles 7 ,. 8 and 9 are arranged with alternating polarities, permanent, non-magnetizable, horizontally directed magnets 11 adjacent their poles to the lateral surfaces of the edges of the poles 7, 8 and 9 and covered by a non-magnetic material 10.

The thickness b of the Central pole 3 of the housing 1 is determined from the ratio

,

where a is the thickness of the side poles 2, housing 1.

Between the side protruding parts of the bases of the poles 7, and also between the side protruding parts of the poles 8 and between the side protruding parts of the extreme poles 9 and

adjacent lateral protruding parts of the poles 8 there are gaps, the value of which is determined from the ratio

fifteen

 m

where c is the thickness of the ribs of the poles 7 and 8; m is the length of the permanent non-magnetizable magnets 11,

The body 1 of the plate is fixed to the base 12 of non-magnetic material, and its side surfaces are enclosed in a ring 13 of non-magnetic material.

in the transverse wall of the shell 13 there are threaded holes for the release screws 14 screwed into them.

Magnetic plate works as follows,

in the initial (inoperative) state of the poles 2 and 3 of the housing 1 are unipolar with the poles 8 and 9 and unipolar with the poles 7.

In this case, the magnetic flux Ф | closes through pole 7, magnet 11, pole 8, pole 2, bottom of housing 1 and magnet 4, and magnetic flux closes through pole 7, magnet 11, pole 8, pole 3, bottom of housing 1 and magnet 4. As a result, magnetic flux and Fg do not have access to the working surface 15 of the plate and the part 16 is not fixed.

In working condition when installing part 16 on the working surface 15 of the plate

a direct current pulse is passed through the control windings 5 of magnets 4, which magnetizes the magnets 4 so that the poles 2 and 3 of the housing 1 are unipolar with the poles 8 and 9 and are mixed

with poles 7.

Then the magnetic flux Фз is closed through the bottom of the housing 1, pole 2, pole 8, part 16, pole 7 and magnet 4, magnetic flux Ф4 is closed through the bottom of the housing 1, pole 3, pole 8, part 16, pole 7 m magnet 4 and magnetic flux F5 is closed through the pole 8, part 16, pole 7 and magnet 11.

Thus, the magnetic fluxes ФЗ, ФА and Ф $, the passage through the part 15, fastens it to the working surface 16 of the plate.

The plate is switched off by applying a reverse polarity dc pulse to the control windings 5 magnets 4. In this case, the poles 2 and 3 of the housing 1 will again become bipolar with the poles 8 and 9 and unipolar with the poles 7.

After shutdown, the cooker will be ready for the next cycle of work.

The claimed technical solution provides a fundamental possibility of creating a plate in both small-pole and large-pole versions, the use of which will increase the reliability of the fixed-. The laziness of ferromagnetic parts with a wide range of sizes, including small and thin ones, will save energy, simplify management, improve operating conditions, and increase operational safety.

Claims (1)

SUMMARY OF THE INVENTION A magnetic plate comprising a housing made of a soft magnet material in which control windings with cores and alternating polar poles are arranged. insulated from each other by non-magnetic material, the axis of symmetry of which is parallel to the longitudinal axis of the housing, with one part of the poles in contact with the walls of the housing, and the other part in contact with the cores, characterized in that, in order to increase the reliability of operation, the poles are made in a T-shape cross section, the width of the working end of the pole being less than the width of its opposite end, and between the poles are located with alternating polarities non-magnetizing permanent magnets in contact with their field themselves with the lateral surfaces of the poles, while the cores are made in the form of remagnetizable permanent magnets mounted on the housing with the same poles. sir (ri & 2 vy // - j & / fi /// ys /// s fa I.. F Fz FIG. 6 УЖ4 // ЛЖЖ / Х bb FIG. 6