SU233806A1 - Method of electro-erosion electrochemical dimensional processing of metals and alloys in flow-throgh electrolyte - Google Patents

Description

The known method; on the basis of the author. St. AO 193877 electrochemical | rosio, electrochemical processing of various metals and alloys with high performance, reaching 60 removable metal.

However, processing in this way does not provide high accuracy due to large gaps and insufficient selectivity of the aode dissolution process.

In order to increase the accuracy of processing the products in finishing operations, it is proposed to increase the frequency of oscillations of the electric current. Amplitude “april” on the electrodes maintains a slightly higher burning voltage dugp.

FIG. 1 shows a device of electroerosioin-o-electrochemical processing in accordance with the proposed method; in fig. 2 - no-load voltage pulses for scooping and finishing; na fshg. 3 - impulses of working stroke voltage during roughing and finishing.

A black treatment of the product / is carried out by an electrode tool 2 connected to the power supply source 3. The latter consists of a three-phase transformer 4 with an inverted winding (which is 5 and a rectifier M1. 6. After preliminary roughing with a new or the same electrode 2 with the names of displacements IB axial and lateral directions for the size required for removal of the allowance, When switching the contacts 7, 8 and 9, 10, the winding 5 is turned and the control unit 11 relieves the voltage (1.5-2 times). By applying control current from the device 12 to the diodes, a part of the pulse is cut off It also triples their frequency.

Pulses of the no-load voltage (Fig. 2) for roughing and finishing are different in size. Amplitude voltage 1 is selected; so that it does not exceed much the voltage U of the arc (Fig. 3). Therefore, the breakdown can occur with a sufficiently small gap. Excess voltage over {Od (1.1-1.5 times) is necessary to prevent short circuits.

The gap is maintained by the presence of electrical discharges in the gap. If, during roughing, the three half-waves of a voltage merge into one pulse 13, then during finishing, a separate pulse 14 is formed from each half-wave.

Imools 15 and 16 of intrusion (Fig. 3) by the preprocessing of roughing are different from pulses 17: And 18. They are finished in finishing, their form, and M1plnttude and the following.

Adequate p, the removal of material from the product occurring as a result of elactrohalos i eleaT / roHIMIC processes, control of electrolyte concentration and elaptoresistance, voltage, current and other impulse parameters. In this case, erosion is corrected by inaccuracies due to anodic dissolution and electrochemical, and the process improves the cleanliness and

reduces .number of structural changes after erosion treatment.

An increase in the frequency of the pulses can occur through the ST1Isl ib result of 1with, the absence of high-frequency machines, as well as the lamellae or 1Gylu | TsrovadnI1KOKOHX generators.

Claims (1)

Invention Formula The method of electroerosion-electrochemical treatment of metal processing and alloys: in metals and alloys: in aut. St. No. 193877, characterized in that, in order to increase the accuracy of the processing of the products during the finishing operations, they increase the frequency of oscillations of the electric current, and the amplitude test on the electrodes maintain a slightly higher arc burning voltage.