Chemistry: electrical and wave energy – Apparatus – Electrolytic
Patent
1998-01-16
1999-11-02
Valentine, Donald R.
Chemistry: electrical and wave energy
Apparatus
Electrolytic
204275, 204279, C25F 700
Patent
active
059763302
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a device for the electrochemical treatment of recesses at the inside of components. With devices known so far, the electrolyte solution is introduced into a feed bore of the electrode and is passed along the treatment element of the electrode. The electrolyte solution flows back via a drain bore which has been cut aligned with the feed bore. Because of this the electrode is relatively long and can therefore only find limited use.
SUMMARY OF THE INVENTION
In contrast thereto, the device in accordance with the invention for the electrochemical treatment of recesses has the advantage that a relatively space-saving design of the electrode is possible. Two treatment locations can be arranged one behind the other in a simple manner. Because of this it is possible to produce two contours simultaneously, i.e. in one work step. Because of this it is possible, in particular in connection with manufacturing on an industrial scale, to rapidly produce detailed contours of high quality. In particular, by means of adapting the shape of the electrode and the size of the working gap between the electrode and the workpiece, it is possible to produce contours of non-uniform depth and shape.
BRIEF DESCRIPTION OF THE DRAWINGS
An exemplary embodiment of the invention is represented in the drawings and will be explained in more detail in the following description. A longitudinal section through an electrode is represented in FIG. 1, an enlarged detailed representation of the first and second treatment position in FIGS. 2 and 3, a treatment position with the component arranged in FIG. 4, and a cathode disk in FIG. 5.
DESCRIPTION OF THE PREFERRED EMBODIMENT
In FIG. 1 an electrode is identified by 10, whose support 11 is made of an electrically conducting material, for example brass and is used as the cathode for an electrochemical treatment process. The support 11 has a centered blind bore 12, which is used as the inlet for the electrolyte solution. An extension 14 is formed at the bottom 13 of the blind bore 12 in the support 11, on which a guide element 15 has been placed and fastened with the aid of a screw 16. Furthermore, a first protective sleeve 18 has been placed on the support 11, which rests against the exterior of the support 11. Following the protective sleeve 18, looking in the axial direction of the electrode 10, a bushing 19 of brass or other electrically conducting material rests against the exterior of the support 11. On its side facing away from the guide element 15, the bushing 19 has a collar 20 for fastening the electrode 10 on a bottom element, not represented, of a treatment installation. The electrode is connected with a power supply via the bottom element. Furthermore, the electrolyte solution is also fed to the blind bore 12 via the bottom element. A second protective sleeve 22 has been placed over the bushing 19 in such a way, that a circumferential channel 23 is created between the bushing 19 and the protective sleeve 22. Furthermore, viewed in the axial direction of the electrode 10, the protective sleeve 22 does not extend as far as the collar 20 of the bushing 19, so that a recess 25 is created between the collar 20 and the protective sleeve 22. This recess 25 is connected with the channel 23 and is surrounded by a cover element 26. Both protective sleeves 18 and 22 and the guide element 15 are made of an electrically non-conducting material, for example electrically insulating plastic.
A circumferential annular groove 28, 29 each is formed on both ends on the interior of the protective sleeve 18 facing the support 11. Each annular groove 28, 29 is connected with the blind bore 12 with the aid of a transverse bore 30, 31 formed in the support 11. The blind bore 12 furthermore has a larger diameter from the opening until shortly past the transverse bore 31, than in the area toward the bottom 13. A cathode disk 35 of an electrically conducting material is arranged between the ends of the two protective sleeves 18, 22, which is seated on the
REFERENCES:
patent: 3647671 (1972-03-01), Abt
patent: 3705843 (1972-12-01), Sickels
patent: 3769194 (1973-10-01), Haggerty
Angermaier Hans
Ziegler Gerhard
Robert & Bosch GmbH
Striker Michael J.
Valentine Donald R.
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