SU891304A1 - Electric resistance machining method - Google Patents

Description

I

This invention relates to e-contact processing and may be used in the processing of large workpieces in the mining and metallurgical engineering.

The known method of electrocontact processing by a rotating disk electrode-tool connected in series with the workpiece in the circuit of the current source.

The disadvantage of this method is the high energy consumption of the current source for unproductive heating of the workpiece in the direction away from the walls of the discharge holes into the metal by the amount of temperature fields.

There is also known a method of electrocontact processing by a rotating disk connected in series to a current source circuit in which the workpiece is preheated. The additional temperature field overlaps with the temperature field.

current source, which slightly reduces the power of source 2.

However, this method is not devoid of large energy consumption and, in addition, preheating of the product is associated with additional energy costs, especially tangible when processing large products, which leads to an even greater decrease in the efficiency of processing.

The purpose of the invention is to reduce the energy capacity of the process.

This goal is achieved by the fact that the electrocontact treatment of a rotating disk electrode connected in series with the processed

15, the product into the power supply circuit, is led by a double electrode consisting of two disks arranged on the same axis, the gap between the side surfaces of which is chosen within

20 O, 2 - 0.8 radius of well formed from a single bit.

Claims (1)

By using a double electrode with a gap between its discs, less energy is needed to melt the metal. This decrease is due to energy savings in melting the jumper, since the melting point in this zone is achieved by overlapping temperature fields from each of the disks. The size of the gap between the disks should not exceed the value equal to O, 8 from the well radius, since otherwise the effect of superposition of temperature fields is weakened and the lintel metal is not heated enough. Reducing the gap to less than 0.2 of the well radius is not economically feasible, since in this case the reduction in energy intensity is insignificant, and becomes commensurate with the cost of complication of the electrode design. FIG. 1 shows the principal processing scheme of the proposed method I in FIG. 2 is a diagram illustrating the removal of a jumper due to the superposition of temperature fields from each of the disks. Part 1 and the double disk rotating electrode-tool 2 are connected in series to the power supply source 3 circuit. The electrode tool consists of two identical and located one axes of the disks. The gap between the disks is set to 0.2 0.8 of the magnitude of the well radius, which is formed from a single bit. О44 When applying voltage from the power source, the discharge pulses melt the metal around the working surfaces of the disks. In this case, the metal of the bridge is melted due to the superposition of temperature fields from each of the disks and is carried out together with the rest of the metal by the rotating disks (Fig. 2). Experimental verification of the proposed method showed that, compared with the known, the process energy intensity is reduced by 10 - 15%. The invention The method of electrocontact processing with a rotatable disk electrode connected in series with the product to the power supply circuit, characterized in that, in order to reduce the energy intensity of the process, the processing is carried out by an electrode consisting of two disks arranged on the same axis side surfaces of which are chosen in the range of 0.2-0.8 times the value of the radius of the well formed from a single bit. Sources of information taken into account during the examination 1. USSR author's certificate No. 125727, cl. B 23 P 1/06, 1960. 2, USSR Copyright Certificate No. 162019, cl. In 23 P 1/06, 1964 (prototype). / str f Fi.g