SU1371881A1 - Device for magnetic-abrasive machining - Google Patents

Description

(L

with

00 OS

figure 1

The invention relates to a machine tool industry and can be used for magnetically abrasive machining of parts.

The aim of the invention is to improve the processing performance by redistributing the magnetic fluxes and creating a continuous flow in the bath.

FIG. 1 Pre-installed device, general view; in fig. 2 - the same, top view.

The device contains two non-magnetic clips 1 and 2, pressed on coaxially on the shank 3, designed to be fastened in the hypindle of a round turntable (not shown). In the cage fixed evenly spaced around the circumference of the scale blocks. Each unit consists of a permanent magnet 4 and a pole-IP1H) tip 5 L-shaped, iz-lOTOB. ieHiioi o from a magnetically soft material .1: 1, the inner surface of the L-shaped Io, 1H tip is in contact with the non-working 1) lx) C () m and the side surface of the magnet 4, and the working surfaces of the pole tip 5 n the magnet 4 limited by the side of the annular groove formed by magnetic systems. Magnetic blocks are separated by insulating spacers 6. Diameters D; the outer and D2 inside ||) of the moreover the cylindrical holders are selected in such a way that between the working poles of the magnets of the coaxially arranged rims there is an annular ring called width

one),

- (d + 26),

where (1 diameter of the workpiece;

iS working gap between surface products and working poles

At the beginning) AG) the device is installed by installing the wagons and rolls of the shank 3 3 in the spindle of the uni- versal | -o round turntable, yciaiiObi.ienHoro on the table of a metal machine, for example, a vertically milling machine, and in a spindle. the cartridge is attached to the image), 1 gyvayos product. Moving the table of the freestanding machine in the horizontal plane 1И) d | (coordinates, achieve this in; | (1) to axis and; 1 pieces and annular groove, () 1) sections 12 with p) a-, and internal) as1I) The position of mag- lite 1 blocks was matched. Raise the table from 1 i xiiicrnoM I.1I downstand p1inde1b with the product, achieve a position when the whole area is 1i1a1lk1n (the surface turns out to be ipv / Ki iia n the groove of the device. Then ferroabrasive is fed into the ring-iiii device

five

0

five

0

This material is attracted to the working poles of the magnetic blocks, and the product and device are informed by rotational movements around their axes. With the help of a magnetic field, the working poles of the blocks carry away the grains of the ferroabrasive material and give them movement along the circumference of the annular groove of the device with respect to the product rotating around its axis. In this case, the magnetic field induced in the working gap of the devices turns out to be uneven, and the magnetic leakage fluxes are minimized, since the external magnetic flux of each constant magnet 4 closes along a magnetic circuit having a minimum length and resistance due to the L-shaped shape of the pole tip 5 and the magnetic characteristics of the material from which it is made. Concentration of the flux through the permanent magnet conjugation lines; in 4 with pole tips 5, where the magnetic field reaches the highest saturation, leads to the fact that individual grains of the ferroabrasive material, lining up along the magnetic induction lines, form a rigid brush, within which each grain is acted upon by higher normal and tangential magnetic forces. As a result, the productivity of the process increases. In this case, the magnitude of the magnetic forces can be changed by decreasing the area SK of the pole of the tip 5, since the force is directly proportional to the magnetic flux 1) and inversely proportional to the chopstick zero pole

five

F

2

0

five

0

2 (ioS

where c is the magnetic permeability of the vacuum.

The device has zones with increased magnetic flux density, which are evenly distributed over the annular gap, which allows efficient use of the magnetic energy of the system and ensures high efficiency of the process.

The use of Z-shaped Z-shaped tips made of a magnetically soft material provides high values of normal and tangential magnetic forces in places of nx sleeves with stand-up magnets and saves magnetically hard material.

The replacement of the noron and its removal from the working poles is carried out with the help of scrapers made of non-magnetic material.

g

CPU d.2

Claims (1)

DEVICE FOR MAGNETIC-ABRASIVE PROCESSING of products, including external and internal magnetic systems forming a ring groove, whose poles of opposite polarity are located opposite each other, characterized in that, in order to increase productivity, the magnetic systems are assembled from magnetic blocks separated by insulating spacers, each of which made in the form of a permanent magnet and a L-shaped pole piece, the inner surface of which is in contact with the non-working pole and the side surface Strongly magnet, wherein the working surface of the pole piece and the magnet limited lateral surface of the annular groove. Φί / Ζ.1