LU83329A1 - EXPANDABLE ELECTRODE FOR CAVITY GENERATION WITHIN A MASSIVE ROOM - Google Patents

Description

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Inventor: Learco .jj? IT · nu pi-Auer.ti- invention otiet the realizationauior. u 'a · · particular éiectrout qUî allows to practice, by electroérosj on' * ue ^ cavities to 1 ’i niérj e-ur to a massive niece.

The aeuanie sc .τ ·; -ν & 1 German iKJG L.644s & réièr · î a device e ~ procéûS for the creation by electroeroaion this cavi tûs of revolution or not, in massive metal parts; an electrode in the form of this acist is used which, by means of a head that cannot be controlled, can be moved, according to the three coordinates that space. The euidave to the electrode is iait by an axial thrust control rod, articulated on an electro-ro.orte.

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hi- s ceuros ien nc 'A; 401 73Q.G is relative 1 ene; .St ·. <. ·: Ur.-ue i:. “O..jique cestinée au guida, ee du movement i ·· 1 u :: oui.il, riGii <u.ier, l a éleci-wheel, by u ' nne rod ye command-; '' E â txxrih.it: fourcnut.

Thanks to the construction of the control head, a relative movement of a rotation using the control rod Compared to the priese with a axis, causes a rotational sliding of the sharpened twist of the spatula-shaped pi on the guide face . The movements of the out yes result from this are very varied: the tool describes a movement, oscillating in a plane passing through the axis of the control rod; eu Link the tool describes a circular movement around the base of a cone, the top of which is located at the foot joint in faith! spatula.

The research which led to the present invention has shown that the speed or working of the tool can be greatly improved, by the following combined uses, to improve! the renoement is the electro.

I1 Électroüi uécrit uans the aforementioned patent applications, if in that capable of movement more or less varied and sophisticated, n-sit in electrical contact, during the operation of electroerotic on a single regenerator, with the area to work. That '; . involves these very long working wolves. One could increase the current censorship to shorten the working times, but this: "could harm the surface homogenity with the development of non-eesiris craters, in the case of more delicate works.

i. .1. In order to overcome the disadvantages, we propose, according to the invention, a particular type of expansion electrode which makes it possible to work on a larger electrical contact surface “and therefore to reduce the times of job.

We therefore see the advantage presented by the object of the invention, c1 is-to-dii -c, an electrode with variable seronometry, capable of working * as the electrode described without the two patent applications cited,

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'Le., I'; ‘. * Ύΐ \ annexSt-s illustrate the Different types t’ éj ectroo t-'s their operation.

The n-r. 1 shows the electroae in its open position i nf éri euro;

Figs. 2 S fc lL iaont the electrode in its upper open position;

Fig. 3 shows the electrode closed and in its eccentric expansion position.

Fig. 4 is a variant of FIG. 1.

In the realization üe fig. 1, the electrode 1 is divided into four sectors (6.6 sectors; here for clarity, only two are shown in longitudinal section).

The above-mentioned sectors actuated by a control rod 3 centered on the cylindrical body of mistletoe (not shown).

The rod oe controls, in its movement towards the Las removes the sectors, which can be brought closer with the movement! F reverseede mounted rod.

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Said rod actuates the sectors by means of springs; linear 4 which are mechanically embedded in the upper part i of each sector.

In this embodiment, the useful part of the electrode is the lower external part. Once the actual electro-erosion operation has been completed, the electrode can be closed for extraction.

In the realization of fig. 2a and 2b the electrode can open in its upper part.

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: $ j The lower end of the control rod 3 has i.

I an articulated parallelogram l. The ends of said Γ '*;) arms each have a support sector 6 which is always in contact with the middle part of each sector. Once the election: | trode in place, a simple movement up the control rod, allows the remoteness of the sectors in their eupé-f rieure, fi g- 2b; which allows very difficult, if not impossible, EDM operations with the normal electrode. Indeed: ·:> Z 'the upper part of the electrode can work at the top to make very special cavities 7, fig. 2b. In this case, the lower ends of the sectors remain united by common fixing means.

ï; I; laughed at the realization of fig. 3, the control rod has £? ! · At its lower end two eccentrics 8 pseudo-triangular t ί j / fixed removably on a corner 9 · The end 10 is provided with a cylinder 11 which slides in a rail 12 practiced along and vertical] einen! of the middle part of the sectors 2. The simple movement S · f_ · down of the control rod allows the sectors to move outward, parallel to each other.

The achievements shown in Figs. 1, 2 and 3 refer to a complete opening of the electrode, but only half -; ί opening could be considered, taking into account the fact that electro--1. works only on one side.

h I - p It is understood that other systems of "bursting" of the electrode P can be envisaged as illustrated in the fig · 4 yes allows p - moreover, according to the depth of the end of the control rod, P to control the opening of the upper part, or the lower part * or the whole of the electrode.

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| ··; It goes without saying that the opening system of the electrode which p: raopelle. the opening of an umbrella is within the scope of the present invention. * | -i invention as well as other more sophisticated systems such as? ': those because planetary.

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Claims (5)

11. Lie οτ: ι Ode expandable for generation of cavities inside a massive part characterized by the fact that it is constituted by a set of sectors which can be separated from each other by means of the action of a rod of control, coaxial with said electrode. 2. Expandable electrode according to claim 1 characterized in that the sectors constituting the electrode are distant in their upper part. 3. Expandable electrode according to claim 1, characterized in that the sectors constituting the electrode are distant in their lower part. 4. Expandable blectroae according to claim 1, characterized because the fact that the sectors constituting the electrode are spaced uniformly and parallel for the entire height of the electrode S Expanded electrode according to claims 1, 2, 3 and 4, characterized by only half of the electrode is divided into sectors. t. Expandable ejector according to one of the preceding claims, characterized in that during the EDM operation at least one sector that the electrode remains in electrical contact with the area to be plowed. 7. Expandable electrode according to claim 5, characterized in that said electrode works with the part divided into sectors. i 'i j 1 / 20j t LU I: .. Jt'nruji *>. nan.-ii i t. se on uee res i previous cations oaraoT.ériué nur 3t. fai 1 naked the electrode works in the closed position. . £,] ectroü *. expandable according to claims 2, 3, 4 and 5, characterized by the fact that the electrode performs the electro-erosion operation in the configurations mentioned in said claims. I li. Llectroue erp an s i l: ·! e according to claims 1, 2 and 3 | "characterized by the fact that the opening angle of the sectors i S can be - / eria'ole. ti S \ î; ij. ... Jrcxroat exnansi goose according to claim 4" characterized X kj because the fact with the ci stance between sectors is variable. | ----- it /.*%, 'wd il vvJ