DE1790122A1 - Electrochemical metalworking machines - Google Patents

Description

Electrochemical metal working machines

The invention relates to a device for regulating the temperature ctO3 electrolytes in machines for electrochemical Metalworking where .'a controllable heat exchanger in the separately installed electrolyte container arranged i

In the case of machines for electrochemical metalworking, this is the case workpiece to be molded, d'ie anode, and the molding tool that Cathode, flushed with an electrolyte liquid, e.g. a Saline solution. Through the flow of current between anode and cathode metal ions go into the workpiece acting as an anode Solution. With a suitable dimensioning, the result is · the negative dfjs tool, e.g. 3. a die, in the workpiece.

109884/0489

Ch / Kz

6AD ORIGINAL

Boi flen currently used "Maser, inor. I ;; t the Abbi Ldun ^.; ^ CM-.i.ui °; -keit limited to about five to ten hundredths of a mm. This Imaging accuracy is sufficient for numerous application purposes, E.g., the manufacture of the crescent die 'production, not always off'. A climb Expect the mapping accuracy when the most essential i'arameter that play a role in the removal process play, such as temperature of the electrolyte, conductivity, feed of aea tool, etc., kept extremely precisely constant or can be adjusted as quickly as possible.

Influencing the temperature is particularly problematic of the electrolyte, since this control loop has considerable time constants due to the relatively large amount of electrolyte Pipelines etc. whitens.

Me object of the present invention is to reduce the thermal Time constants of the electrolyte temperature control loop to belittle. According to the invention, this object is achieved by dai3 in the machine, an additional heat exchanger in the electrolyte circuit is switched on, which is used to regulate the torques The electrolyte temperature is used. This division of the temperature control circuit a the electrolyte temperature can fall delay, freely and also sohr precisely regulated, so that a larger Imaging accuracy of the process is achieved. A particularly favorable design results when the heat exchanger is short in front of the electrolyte outlet opening on the tool electrode is arranged and the electrolyte temperature directly in the inflow is measured.

1098847 ^ 419

JWMHOOM WS OBIGINM.

PLA ⁵

The invention is explained in more detail with the aid of a drawing 3ei:.

Ouch one. Electrolyte container 2 is the electrolyte liquid 18 by a pump? printed in the circuit 4 in the working gap 19 between workpiece 5 and tool 6. From the working gap 19 the electrolyte flows into a collecting container 20 and from here back to the container 2 .

In order to regulate the temperature of the electrolyte there is 2 a heat exchanger 17 is provided, d ^ r by a temperature adjuster w 14 is controlled by augmentation. The temperature controller 14 receives its control commands from a controller 13 »which the current value from one to the Electrolyte liquid immersing probe 15 and the set point from entering setpoint generator 16 is supplied.

In addition to this heat exchanger, there is also a second heat exchanger 8 provided in the machine, namely this one - kur2

in front of the outlet of the electrolyte in the working gap 19 in the fastening 7 of the tool 6. The heat exchanger Q is controlled by a temperature controller 9, which in turn receives its control commands from a controller 10. The measurement of the electrolyte temperature for regulating the second heat exchanger is carried out with a measuring sensor 12a in the inflow to the tool.

- 5 - 109884/0419

BATH

PLA 6S / 1S? 1

In addition to this actual value, the controller 10 receives a setpoint generator 16 from the front the same setpoint value as the controller 13 is supplied. Ea would be However, it is also conceivable to enter separate setpoint values for both controllers to be provided *

In addition, a sensor 12b is provided with which the Temperature of the electrolyte after exiting the working gap measured in the collecting container 20 of the work room of the machine will. The actual temperature value measured here is compared with the Actual temperature value in the inlet in a comparison element 11 ver. and the temperature difference between inlet and Au3-tri tt of the electrolyte also acts as a D influence on the PD controller 10 given.

In the present arrangement, the heat exchanger 3 is "dimensioned for such a heat output that fine control to fractions of ⁰ C within a temperature range of + ^ 2-3 ⁰ C deviation from the nominal value can be achieved.

5 claims
1 figure

- 4 - Ch / Kz

109804/0489

Claims (4)

PLA 68/1521 - 'claims 1. Device for regulating the temperature of the electrolyte at Machines for electrochemical metalworking with a controllable heat exchanger in a separately installed electrolyte tank provided iat, characterized in that it is in the machine (1) an additional heat exchanger (8) in the electrolyte coil (4) is switched on, which is used to regulate the elec- Trolyte temperature is used. 2 * Device according to claim 1 »characterized in that the heat exchanger (7) shortly before the outlet opening of the electrolyte. the factory ground electrode (.6) '.. is arranged. r 3 · Device according to claim T, characterized in that for the Hegler (10, \ 3) a common setpoint generator (T, 17} *) is provided for both färmetauacher (T, 17} *)., 4. Device according spoke 1 and 2, characterized in that the Teroperaturmeßfiihler '(I2a) of the Rtglera (10) for the additional The heat exchanger is arranged in the BlÄktrolytsiuXluQ zum Werkeeug (6). ■ "- .. ■" · ■ '"■■.. -" "5. Device according to Claim 4, marked by a Sensor (12b) in the working space (19) leaving trolytflüaigkeit (18), through the formation of the temperature difference « between the values of both measurements Ci2a, 12b) and the additional one This value is uploaded to the controller (10), Le e rs e i 1