DE102006016368A1 - Installation for cleaning and polishing the electrically conducting surface of a workpiece comprises a control unit for monitoring the polishing stream depending on the immersion speed of a workpiece in an electrolyte - Google Patents

Abstract

Installation comprises a control unit (12) for monitoring the polishing stream depending on the immersion speed of a workpiece in an electrolyte.

Description

The The invention relates to a system and a method for cleaning and Polishing the electrically conductive surface a workpiece according to the preamble of the 1st and 38th protection claim, wherein the subject matter the anode forms.

To DE 102 07 632 A1 discloses a method of plasma polishing workpieces of metal and metal alloys, wherein the anode is the workpiece to be treated, which is for processing in a heated aqueous electrolyte solution, wherein as the electrolyte solution, a mixture of ammonium salts is used, which are dissolved in water.

Prefers become workpieces machined from titanium, titanium alloys and compounds. The procedure is preferably at a temperature of 70 to 95 ° C, in particular carried out at a temperature of 80 to 95 ° C. The electrolytic solution has a pH of 5.0 to 7.0, especially from 5.1 to 6.5. During the electrochemical machining becomes a voltage of 270 to 330 V, in particular from 280 to 320 V, applied.

At the Plasma polishing is done by increasing the voltage between the Electrodes generates a gas film around the workpiece (anode), which encloses the entire workpiece surface. Of the so formed gas film displaced the electrolyte solution from the surface of the workpiece. This reduces the current very strong and the tension drops above that Gas film off.

It comes to a partial ionization of the gas stream and thus to Formation of a plasma around the workpiece, by which electrical Discharges take place. This created active environment takes Influence on the anode surface or the workpiece and serves to create gloss, deburring, passivating, Reduction of material stresses, improvement of the surface profile, for cleaning and removing all types of residues such as scale, rust, oxides, Paints and varnishes. After plasma polishing, a post-treatment, namely flush of the workpiece with hot or cold water. This aftertreatment is for the removal of chemical Residues or by-products the polishing process and to assist in drying. The while The process resulting gas is passed through a suction device away. The disadvantage here is that it comes to uncontrolled current increase can if the workpiece immersed too quickly in the electrolyte.

In EP 1 228 267 B1 For example, a method and apparatus for cleaning and / or coating electrically conductive surfaces is described wherein a chamber is filled with a liquid electrolyte. In the electrolyte there is an anode structure, which is suitably arranged with respect to the surface to be treated. Furthermore, the apparatus comprises means for continuously moving the workpiece, opening and closing the treatment zone and controlling the supply and removal of foam from the treatment zone. The chamber is divided into two sections by means of a perforated chamber separation element and a heated screen which causes the electrolyte to boil.

These Facility allows not the circuit of the workpiece as an anode and has a relatively complicated technical structure on.

task The invention is a system and a method for cleaning and polishing the electrically conductive surface of a Workpiece too develop, which has a simple structural design and a safe surface treatment without exceeding ensures maximum currents, where the workpiece the anode forms.

These Task is according to the invention with the characterizing features of the 1st and 38th protection claim solved. advantageous Designs result from the dependent claims.

The system for cleaning and polishing the electrically conductive surface of a workpiece, known from an electrolyte container for the electrolyte, a receptacle for the workpiece, which forms the anode, a cathode and a power supply for providing the polishing stream and the process voltage, wherein the plant According to the invention comprises a control for monitoring the polishing flow in dependence on the immersion speed of the workpiece in the electrolyte. Advantageously, the controller is associated with a lifting device for receiving the workpiece in connection, wherein the lifting movement of the lifting device is in turn controlled in dependence on the height of the polishing stream upon immersion of the workpiece in the electrolyte. Alternatively, it is possible that the controller is in communication with an inflow device of the electrolyte, so that the inflow of the electrolyte can be controlled with the workpiece in the electrolyte container in dependence on the height of the polishing stream. In both variants, it is possible to better control the current peaks that arise in the build-up phase of the plasma, when the rising as the workpiece widening Power is used to control the immersion speed or to control the pump power when filling the electrolyte tank.

at Reaching an upper reference value of the polishing current is either interrupted the lifting movement of the lifting device or the inflow of the electrolyte and falls below this upper reference value or a lower Reference value either the lifting movement of the lifting device or the Inflow of the electrolyte continued.

In The controller is a maximum current value adjustable so that when exceeded of the maximum current value, the power supply is interrupted. The controller also has an indicating instrument for checking of the polishing stream and is also for the purpose of influencing the Speed of the lifting movement of the lifting device can be used.

To the Setting the polishing time is at the controller a first actuator provided, which preferably designed as an electronic timing relay is. This can be the remaining time of a machining operation are displayed.

In or on the electrolyte container Both heating and cooling are provided to ensure a consistent temperature To ensure electrolyte temperature. For this purpose, the controller has a temperature controller for connection the heating or cooling up, over whose display is the setpoint / actual temperature is shown. When falling below the set temperature of the electrolyte is the heating and when exceeded the set temperature of the electrolyte, the cooling switched on.

Farther the system has sensors or measuring devices for detecting the main characteristics of the electrolyte, which is used to produce a Plasmas are required. An important feature is the PH value of the electrolyte. At a measuring device, e.g. one Minimum value and a maximum value of the PH value be adjustable, so that it is possible for deviations from the desired PH value, over one or multiple dosing devices automatically adding substances to carry out on the electrolyte, the achievement of the given Allow PH value.

Farther It is advantageous in the facility measuring equipment for measurement the concentration and / or conductivity to integrate the electrolyte.

One Temperature sensor allows when crossing a predetermined temperature of the electrolyte whose cooling and falls below the predetermined temperature, the connection of the Heater.

The Recording for the workpiece is preferably made of titanium or stainless steel and can with one or more individual workpieces or with one or more workpieces equipped with receiving magazines become.

The Recording or the magazines are up to the contact points to the workpiece / the workpieces electrically insulated or encased with dielectric material.

The Recording is rotatable about a vertical axis, creating a better Surface quality achieved becomes.

alternative or additionally Is it possible, in the electrolyte container injection nozzle to arrange for targeted bath movement. Above the electrolyte tank is a suction for the resulting vapors arranged, the advantageous way with a recooling system and a return of condensate in the electrolyte container is coupled.

It is still possible to achieve a cleaning effect the electrolyte container and / or the Cathodes and / or the heating elements with ultrasonic vibrations apply.

The Plant is in accordance with a preferred embodiment with a rinsing device for the edited workpiece provided with a heater for heating rinse water is coupled.

Of the Electrolyte container, the inclusion of the workpiece, the suction and the flushing device are formed in a polishing cell, preferably a safety cover / closure having.

power supply and control can inside or outside the polishing cell can be arranged. It is also possible to have several polishing cells provided with a common power supply and / or control.

Of the electrolyte container and / or sheets and / or screens located therein are as a cathode educated.

The entire workpiece or at least the surface of the workpiece consist of metallic material, in the latter case the workpiece a basic body may have an insulating material whose surface with the metallic material is provided.

When metallic materials can high alloy steels, Titanium, copper or alloys of the aforementioned materials use Find.

The procedure for cleaning and polishing The electrically conductive surface of a workpiece is carried out using a plant according to claim 1, using an electrolyte container for the electrolyte, a receptacle for the workpiece, which forms the anode, a cathode and a power supply for providing the polishing stream and the process voltage, according to the invention Submission rate of the workpiece is set in the electrolyte as a function of the height of the polishing stream.

It is possible that the immersion process of the workpiece in the electrolyte at one filled with electrolyte electrolyte container by a downward movement of the workpiece takes place in the electrolyte and that when an upper reference value is exceeded the polishing stream reduces the immersion speed or the Submersion is stopped and falls below this upper reference value or a lower reference value increases the dipping speed or the immersion process is continued.

alternative can the immersion process of the workpiece in the electrolyte thereby done that the workpiece in an unfilled one electrolyte container spent and the container filled with electrolyte becomes. Then it will be exceeded an upper reference value of the polishing stream of the filling of the electrolyte reservoir interrupted with the electrolyte and falls below this upper reference value or a lower reference value.

Prefers By means of a controller, a maximum current value is set and when exceeding the Maximum current value the power supply interrupted.

Favorable Way can while Plasma polishing the electrolyte temperature of the electrolyte means a heating and / or a cooling be influenced so that the temperature of the electrolyte during the Plasma polishing preferably 20 ° C to 95 ° C. to warranty a predetermined temperature is as needed cooling or the heating can be switched on.

Farther can while plasma polishing, the pH of the electrolyte can be influenced. For that will be e.g. to maintain a given pH during the Plasmapolierens substances attached to the electrolyte, the Allow compliance with the given PH value.

Farther it is an advantage if during the Plasmapolierenens a measurement of concentration and / or conductivity the electrolyte takes place and these are corrected if necessary.

On The polishing process also affects a bath movement of the electrolyte positive.

Of the electrolyte container and / or the cathodes and / or the heating elements can for Cleaning be subjected to ultrasonic vibrations, whereby to dissolve deposits easier and thus can be better eliminated

With the plant of the invention and the method for cleaning and polishing the electrically conductive surface of a workpiece is the first time a defined immersion of the workpiece in the electrolyte guaranteed which is the prerequisite for a process-reliable and high-quality machining of the metallic surface forms. Without the defined immersion of the workpiece can it is undesirable high current peaks that come from a shutdown or a failure may cause the control and / or the power supply.

The Invention will now be described with reference to embodiments and accompanying drawings explained in more detail. It demonstrate:

• a) im Längsschnitt (Teilschnitt),
• b) in der Draufsicht,

1 : Plasma polishing machine for small parts with manual loading,

• a) in longitudinal section (partial section),
• b) in plan view,

2a : Schematic representation of an electrolyte container with integrated heating and cooling in the front view,

2 B : Schematic representation of the electrolyte container in plan view,

3 : Plant in a row arrangement,

4 : Plan view of a plant (schematic representation) in a circuit arrangement with two polishing cells,

5 : Plant acc. 4 with representation of the enclosure U in front view and top view.

A compact system 1 for plasma polishing for small parts for manual loading in front view and partial section shows 1a and in the plan view 1b , The system is housed in a vertically split housing G. In the embodiment shown, an electrolyte container is located in the right side 2 , with an anodically connected recording 3 for one or more workpieces not shown here which formed the anode. The receptacle is preferably made of stainless steel or titanium. It is possible, to pick up a single workpiece or, for example, a magazine stocked with several workpieces, which except for the immediate contact points for receiving 3 and is electrically isolated from the workpieces. The electrolyte container 2 - The polishing pan - is switched here as a cathode. (Alternatively, plates or sieves in the container can be connected as a cathode if the electrolyte container is made of dielectric material.) The recording 3 sits at a lifting device 4 that can and does perform a vertical movement (by hand or via the controller ( 1a ) as a function of the polishing current in the electrolyte, which is in the electrolyte container 2 located, can be brought. Advantageously, the recording 3 rotatable about a vertical axis, as with the plasma generated a better polishing / cleaning effect can be achieved. At the bottom of the electrolyte container 2 is a heater 5 intended. Furthermore, in the right chamber of the housing G, a cooling unit 6 arranged. By means of heating and cooling unit, the temperature of the electrolyte can be kept within predetermined limits. About a circulation pump 7 can from a storage container 8th the electrolyte via a line L1 to the electrolyte tank 2 , from there via a line L2 to the cooling unit 6 and via a line L3 to the reservoir 8th be pumped, whereby the electrolyte can be cooled. It is gem. a variant not shown also possible from the cooling unit 6 Cooling elements on / in the electrolyte container 2 and / or to the reservoir 8th to lead and thereby achieve a cooling of the electrolyte. The electrolyte container 2 is by means of a lid 9 locked. The lid 9 is connected as part of a protective measure with a safety switch (not shown) and the safety switch with the controller 13 coupled, whereby the immediate shutdown of the polishing voltage is ensured when opening the lid.

For reasons of clarity, measuring devices or sensors for detecting the electrolyte temperature, the concentration, the pH and the conductivity of the electrolyte are not shown. These may be located in the electrolyte container or installed in the piping system provided for circulating and draining the electrolyte, and maintain communication with the controller 12 ( 1a ) and corresponding evaluation the constant limits. Alternatively, mobile measuring devices can be used.

Furthermore, dosing devices not shown here can also be used on the electrolyte container 2 or at the reservoir 8th be coupled, with which the electrolyte required to ensure the specified PH value / the conductivity / the concentration of the required substances can be supplied.

The right side of the housing G is insulated 10 Mistake. In the left side of the plant 1 are located in the housing 1 the power supply 11 and the controller 12 , The housing G sits on a console 13 ,

At the top (s. 1b ), a display A1 for the electrolyte temperature, a display A2 for the polishing time, a display A3 for the polishing stream and a display A4, which signals the operational readiness of the system are provided. Further, an emergency stop switch S1, a switch S2 for starting the polishing current and a switch S3 for stopping the polishing current in the left upper side are disposed in the housing G. At the left side wall of the housing G in the illustration is the main switch SH.

About power supply / control 11 / 12 For example, a DC voltage of 180V to 340V and a polishing current of 0.10A / cm ² to 0.20A / cm ^{2 are} preferably set at a temperature range of 20 ° C to 95 ° C to obtain the best possible polishing effect. Preferably, the connection to the standard power supply with 230V. Optionally, the connection to a three-phase network with preferably 400V. Alternatively, other power supplies, for example, using AC switched or modulated DC or pulsed DC voltage are possible.

The Using a high DC voltage in conjunction with a possible Potential carryover by the electrolyte requires special electrical protective measures. A protective measure is the use of an IT network with insulation monitoring for the Supply voltage of the assemblies, which communicate with the electrolyte can come. If a small insulation fault occurs over the Control a signaling, whereby the operation of the plant is still can be continued. In case of a serious insulation fault both a signaling and the immediate shutdown takes place the polishing voltage.

The Control for the sequence of Plasmapoliervorganges is preferred as PLC control educated. With her, the control of the pump to be operated Valves, the constant maintenance of the electrolyte temperature by means of Heating and cooling as well as preselection of the polishing time and display of the remaining time and, if necessary, triggering the addition of substances to the electrolyte. This is the control coupled with the appropriate sensors / measuring devices.

After completion of the polishing process, the workpiece from the electrolyte container 2 removed, with a rinsing liquid (preferably water) rinsed and then dried. This is done in the embodiment gem. 1a and 1b in sibling, not shown rinsing and drying stations.

The for one Workpiece material best Parameters related to the electrolyte and its properties are previously determined empirically It is still gem. one not illustrated embodiment possible, above that electrolyte container to install a suction, which with a recooling system and a return of the condensate to the electrolyte container or to the reservoir can be equipped.

A especially simple, reliable and convenient cleaning of the electrolyte tank, the heating elements and if necessary the pipe systems can be integrated or adaptable ultrasonic vibrators (not shown) take place.

The schematic diagram of an electrolyte container 2 with square cross section and integrated heating and cooling in front view shows 2a and in the plan view 2 B , From / to the electrolyte container 2 lead an unillustrated electrolyte inlet and an electrolyte drain. Across the bottom of the electrolyte tank 2 are heating elements 5 arranged. The electrolyte container 2 is on its outside by a cooling water jacket filled with cooling water 6.1 surrounded, with the cooling water jacket 6.1 over connections 6.2 . 6.3 is connected to the cooling water circuit. It is of course possible, according to unillustrated embodiments, to provide the electrolyte container with a rectangular or cylindrical cross-section and form the bottom trough-shaped, so that collect mud on the ground and can be derived via a drain connection. The electrolyte container 2 can be switched as a cathode and then consists of the appropriate material, which allows the use of the electrolytes to be used and the workpiece material to be polished. However, it is also possible to use the electrolyte container 2 made of dielectric material, for example to produce plastic and switch corresponding plates or grids as the cathode. The electrolyte is circulated by a pump, not shown here. By means of a nozzle system which can be integrated into the electrolyte container, a targeted flow of electrolyte to the workpiece can be ensured, which improves the polishing result and the effectiveness. The flow direction of the electrolyte should be at right angles to tangential to the polishing surface.

It is self-evident, that the electrolyte container a capacity from about one liter to several hundred liters.

In 3 is a plant for plasma polishing in a row shown. There are a total of 7 stations ST1 to ST7 provided. In the first station ST1 via a charge B, the recording of the workpieces to be polished W and from the B feed the transport to the second station ST2 in the form of a first polishing cell P1, with an electrolyte container, a lifting device, a heater, a cooling and equipped with a suction. After completion of the polishing process takes place in the stations ST3 and ST4 in a first rinse station SP1 a pre-rinse and in a second rinse station SP2 a final rinse. The polishing cell P1 and the rinsing stations SP1, SP2 may be surrounded by a common housing U (shown in dashed lines). By means of a removal E takes place in the station ST5, the discharge of the workpieces. From this station, the forwarding of the polished workpieces W to a drying station T (station ST6) takes place. Finally, the workpieces W are packed in station ST7 (packing station V). The forwarding of the workpieces W takes place via a transport system 14 , The attachment 1 further comprises a refrigeration unit 6 , which is connected to the polishing cell P1 and a power supply 11 and a controller 12 ,

It is also possible to use the plasma polishing machine 1 form in a rotary switch arrangement. In 4 is in plan view the schematic diagram of a plant 1 in a rotary switch arrangement with two polishing cells P1, P2, two rinsing stations SP1, SP2 and a drying station T shown.

In a first station ST1, the charge B and the discharge E take place clockwise followed by a second station ST2 in the form of a first polishing cell P1, a third station ST3 in the form of a second polishing cell P2, a fourth station ST4, which is designed as a first rinsing station SP1 is, a fifth station ST5, which is formed as a second rinse station SP2 and a sixth station ST6 in the form of the drying station. All stations ST1 to ST6 are controlled by a rotary indexing table 15 fed. The refrigeration unit 6 , the power supply 11 and the controller 12 are outside the rotary indexing table 15 arranged.

A plant gem. 4 with representation of the enclosure U in front view and top view is in 5 shown. It can be seen that the plant 1 surrounded by a housing U. Each polishing station P1, P2 is an electrolyte container 2 with a circulation pump 7 for the electrolyte and each rinse station a rinse water tank 17 with a cooling water pumping station 7.1 assigned to the rinse water. Furthermore, a suction 16 intended. The controller and the power supply are not shown here.

The power supply of the systems acc. 3 to 5 is preferably carried out by means of DC voltage in the range of 180V to 330V at currents of 1 to several hundred A.

The power supply 11 is housed in a separate power section, which allows the provision of different supply voltages, the polishing voltage is preferably selected in predetermined levels.

The control 12 is also housed separately in a control cabinet. In this, the switching of the polishing voltage, the evaluation of the polishing current and the control of all workpiece movements and the temperature of the electrolyte and all other process-related parameters.

Also in these embodiments the system is controlled by means of a PLC, whereby for simple Polishing tasks can be switched to manual mode. Favorable Way are the speeds for the vertical and horizontal movement of the workpiece adjustable, with the various movements during automatic operation preferably at constant speeds. At the Plasmapolieren a precise approach to the intended positions to ensure, becomes the workpiece speed switched to crawl speed shortly before reaching the switching position.

Also Here is the defined immersion of the workpiece in the electrolyte bath of special importance, since in this immersion process, the polishing stream rises relatively quickly. Therefore, the control is performed by the polishing current the dipping speed. Upon reaching a preset Reference value of the polishing flow stops the immersion of the workpiece and the polishing current drops again. Falls below the polishing current this reference value or a second preset lower one Reference value, the immersion is restarted. Again, here is the polishing time is adjustable, e.g. over a time relay. The remaining one Remaining time is also displayed.

Favorable Way become during the entire polishing process at short intervals or without interruption the pH and the conductivity of the electrolyte. about Transmitters can also maximum and minimum values are preset. In over- or If these values are not reached, an error message is issued. optional can by means of a metering device, the automatic addition of appropriate Substances to the electrolyte are made to the required levels reach again.

The temperature monitoring of the electrolyte is e.g. by means of an electronic temperature controller carried out.

Farther there is a warming of the rinse water. Preference is given to the rinse water heated to the electrolyte temperature.

The to be preset reference values and the properties of the electrolyte are preferably determined by preliminary investigations.

Next the illustrated embodiments Is it possible, between two polishing stations each one rinsing and, if necessary, a drying station to arrange.

1

investment

G

casing

2

electrolyte container

3

admission

4

lifting device

5

heater

6

cooling unit

6.1

Cooling water jacket

6.2 6.3

Connections to the Cooling water circuit

7

circulating pump

7.1

Cooling water pumping station

8th

reservoir

9

cover

10

insulation

11

power supply

12

control

13

console

14

transport system

15

Rotary table

16

suction

17

RinseTank

A1

display for the electrolyte temperature

A2

display for the polishing time

A3

display for the polishing power

A4

Display, which signals the operational readiness of the system

B

feed

e

withdrawal

L1

management

L2

management

L3

management

P1

first polishing cell

P2

second polishing cell

S1

Emergency switch

S2

switch for starting the polishing stream

S3

switch to stop the polishing stream

SH

main switch

SP1

first rinsing station

SP2

second rinsing station

ST1

station 1

ST2

station 2

ST3

station 3

ST4

station 4

ST5

station 5

ST6

station 6

ST7

station 7

T

drying station

U

enclosure

W

workpiece

V

packing station

Claims (51)

Investment ( 1 ) for cleaning and polishing the electrically conductive surface of a workpiece, using an electrolyte container ( 2 ) for the electrolyte, a receptacle ( 3 ) for the workpiece, which forms the anode, a cathode and a power supply for providing the polishing current and the process voltage, characterized in that the system ( 1 ) a controller ( 12 ) for monitoring the polishing flow (I) as a function of the immersion speed of the workpiece in the electrolyte. Plant according to claim 1, characterized in that the controller ( 12 ) with a recording ( 3 ) of the workpiece having lifting device ( 4 ) and the lifting movement of the lifting device ( 4 ) is controllable as a function of the height of the polishing stream (I) when immersing the workpiece in the electrolyte. Plant according to claim 1, characterized in that the controller ( 12 ) is in communication with an inflow device of the electrolyte and the inflow of the electrolyte, in in the electrolyte container ( 2 ) located workpiece, in dependence on the height of the polishing stream (I) is controllable. Installation according to one of claims 1 to 3, characterized in that upon reaching an upper reference value of the polishing stream (I), the lifting movement of the lifting device ( 4 ) interrupted in the direction of the bath of the electrolyte or the inflow of the electrolyte and falls below a lower reference value, the lifting movement of the lifting device ( 4 ) is continued in the direction of the bath of the electrolyte or the inflow of the electrolyte. Installation according to one of claims 1 to 4, characterized that in the control a maximum current value is adjustable, and that when exceeded of the maximum current value, the power supply is interrupted. Installation according to one of claims 1 to 5, characterized the controller is a display instrument for controlling the polishing current having. Installation according to one of claims 1 to 6, characterized that by means of the controller, the speed of the lifting movement of the Lifting device is controllable. Installation according to one of claims 1 to 7, characterized in that the controller has a first setting device for setting the Polishing time has. Plant according to claim 8, characterized in that the first actuator is an electronic timing relay. Plant according to claim 8 or 9, characterized that with the adjusting device, the remaining time of a machining operation can be displayed. Installation according to one of claims 1 to 10, characterized in / on the electrolyte container a heating and a cooling for the Electrolyte temperature are arranged. Installation according to one of claims 1 to 11, characterized that the controller has a temperature controller for switching on the heater or cooling having. Plant according to claim 12, characterized in that that the temperature controller is a display for displaying the setpoint / actual temperature having. Plant according to claim 12 or 13, characterized that falls below the target temperature of the electrolyte, the Heating and when exceeded the set temperature of the electrolyte, the cooling is switched on. Installation according to one of claims 1 to 14, characterized in that it has a measuring device for detecting the pH value of the electrolyte. Plant according to claim 15, characterized in that that at the measuring device, a minimum value and a maximum value of the PH value are adjustable. Plant according to claim 15 or 16, characterized in that one or more dosing devices for automatic addition are provided by substances to the electrolyte, wherein the substances allow reaching the given PH values. Installation according to one of claims 1 to 17, characterized that measuring devices for measuring the concentration and / or conductivity of the electrolyte are integrated. Installation according to one of claims 1 to 18, characterized that recording for the workpiece made of titanium or stainless steel. Plant according to claim 19, characterized that the recording one or more individual workpieces or one or more magazines can be equipped with several workpieces. Installation according to one of claims 19 or 20, characterized that the receptacle and the magazines, except for the contact points to / workpiece / workpieces, electrically isolated or coated with dielectric material is / are. Plant according to one of Claims 19 to 21, characterized that the receptacle is rotatable about a vertical axis. Plant according to one of Claims 1 to 22, characterized that in the electrolyte container injection nozzle are arranged for targeted bath movement. Installation according to one of claims 1 to 23, characterized that over the electrolyte container a suction is arranged. Plant according to claim 24, characterized that the suction with a recooling system and a repatriation of Condensate in the electrolyte tank is provided. Installation according to one of claims 1 to 25, characterized that the electrolyte container and / or the cathodes and / or the heating elements with ultrasonic vibrations can be acted upon. Installation according to one of claims 1 to 26, characterized that they have a flushing device for the machined workpiece having. Plant according to claim 27, characterized that the rinsing device with a heater for heating of rinse water is provided. Installation according to one of claims 1 to 28, characterized that the electrolyte container, the Pickup, suction and rinsing in a polishing cell are formed. Plant according to claim 29, characterized each polishing cell has a safety lid / closure. Plant according to claim 29 or 30, characterized that the power supply and the control inside or outside the polishing cell are arranged. Plant according to claim 30 or 31, characterized that several polishing cells have a common power supply and / or Have control. Installation according to one of claims 1 to 32, characterized that the electrolyte container and / or formed therein sheets and / or screens designed as a cathode are. Installation according to one of claims 1 to 33, characterized that the entire workpiece or at least the surface of the workpiece consists of metallic material. Plant according to claim 34, characterized that the workpiece a basic body an insulating material that matches the surface is provided metallic material. Plant according to claim 34, characterized that the metallic material is high-alloy steel. Plant according to claim 34, characterized that the metallic materials titanium, copper or alloys the aforementioned materials. A method for cleaning and polishing the electrically conductive surface of a workpiece, using a plant according to claim 1, using an electrolyte container ( 2 ) for the electrolyte, a receptacle ( 3 ) for the workpiece forming the anode, a cathode and a power supply for providing the polishing current and the process voltage, characterized in that the immersion speed of the workpiece in the electrolyte is adjusted in dependence on the level of the polishing current. A method according to claim 38, characterized in that the immersion process of the workpiece in the electrolyte in an electrolyte container filled with electrolyte ( 2 ) takes place by a downward movement / immersion movement of the workpiece in the electrolyte. Method according to claim 39, characterized that when crossing an upper reference value of the polishing current, the immersion speed decreases or the immersion movement is stopped and falls below this upper reference value or a lower reference value the Immersion speed increased or the immersion movement is continued. A method according to claim 38, characterized in that the immersion process of the factory piece in the electrolyte takes place in that the workpiece is placed in an unfilled electrolyte container and the container is filled with electrolyte. Method according to claim 41, characterized that when crossing an upper reference value of the polishing stream of the filling of the electrolyte reservoir interrupted with the electrolyte and falls below this upper reference value or a lower reference value becomes. Method according to one of claims 38 to 42, characterized that by means of a controller set a maximum current value and when exceeded of the maximum current value, the power supply is interrupted. Method according to one of Claims 38 to 43, characterized that while plasma polishing by means of heating and / or cooling the Electrolyte temperature of the electrolyte is affected. Method according to claim 44, characterized in that the temperature of the electrolyte during plasma polishing is 20 ° C to 95 ° C. A method according to claim 44 or 45, characterized that for reaching a predetermined temperature of the electrolyte during the Plasmapolierens the cooling or the heating is switchable. Method according to one of Claims 38 to 46, characterized that while Plasma polishing the pH of the electrolyte can be influenced. Method according to claim 47, characterized that to maintain a given pH during the Plasmapolierens substances are added to the electrolyte allow compliance with the given PH value. Method according to one of Claims 38 to 48, characterized that while plasma polishing, a measurement of concentration and / or conductivity of the electrolyte takes place. Method according to one of claims 38 to 49, characterized that while plasma polishing in the electrolyte container, a bath movement of the electrolyte he follows. Method according to one of claims 38 to 50, characterized that the electrolyte container and / or the cathodes and / or the heating elements with ultrasonic vibrations be charged.