SU531720A1 - Blast machine - Google Patents

Description

one

The invention relates to the shot blasting treatment of products of industrial enterprises and can be used to strengthen metals by surface treatment.

A shot-blasting apparatus is known with a feed of shot to the treatment area through an acceleration tube mounted in a housing equipped with a magnetic field inducing a fraction of the inductor connected to a power source.

The disadvantages of such an apparatus are low productivity, the inability to smoothly control the magnitude of the shot rate at the outlet of the shot blasting apparatus, and the inability to use metal shot from a non-magnetic material to disperse.

The purpose of the invention is to increase productivity and expand the technological capabilities of the apparatus.

For this, in the proposed apparatus, the housing is made in the form of an Ш-shaped magnetic circuit, the middle part of which has a groove, and the acceleration tube is installed in the latter and is equipped with two contact electrodes oppositely located on its inner walls along the entire length, , through the axis of symmetry of the middle part of the magnetic core, parallel to its larger sides, and the contact electrodes can

be connected to the power supply circuit either in series or parallel to the inductor.

FIG. 1 shows the proposed shot-blasting apparatus; in fig. 2 is a section along A-A in FIG. one; in fig. 3 p 4 - wiring diagram.

The shot blasting apparatus contains an input device 1, a housing 2, which is a Sh-shaped, elongated in the direction of a set of magnetically soft plates, a magnetic conductor, an inductance 3, an acceleration tube 4 made of a dielectric and inserted into the groove of the middle part of the magnetic conductor 5. Inside the tube are two contact electrodes 6

The inductance coil and contact electrodes are connected to the power source in series (see Fig. 3) or in parallel (see Fig. 4), then to control the speed of the shot at the outlet of the shot machine, by changing the amount of current flowing through the shot, into the gap The pees of the contact electrodes are set by a variable resistor 7, and the current through the inductor is changed by a variable resistor 8 installed in the open circuit of the inductor to control the temperature of the outgoing other. Bi.

The shot blasting machine works in the following way.

When metal shot arrives through the input device into the acceleration tube, the contact electrodes close the inductance coil electrical circuit. As a result, in a shot-blasting apparatus, a magnetic field is induced, amplified many times by the body-magnetic core and evenly guided by the middle part of the magnetic circuit 5 through the acceleration tube along its entire length between the contact electrodes.

The metal shot through which the electric current flows, acquires its electromagnetic field, which interacts with the electromagnetic field of the shot-blasting apparatus. The force of interaction of these magnetic fields tends to push the conductor (metal fraction), through which the electric current passes, from the magnetic field of the shot-blasting apparatus, is directed along the acceleration tube and is constant throughout its length. As a result, the fraction of the shot, which arrived at the contact electrodes from the input device, moves with increasing speed along the contact electrodes to the output of the shot blasting apparatus. The vacant space on the contact electrodes is filled through the input device with a new portion of the fraction, and the acceleration process is continuous, streaming.

When the inductor, the contact electrodes and the power source are connected in parallel (see Fig. 4), the electric current through the fraction is regulated by the variable resistor 7, and the current through the inductor 3 is regulated by the variable resistor 8.

In this case, the technological capabilities of the device are expanded in two directions:

adjusting only the fractional speed at the outlet of the shot-blasting unit, for which the alternating resistor 8 is in a position that allows passage through the inductor of the full current of the power supply, and the current through the metallic fraction is only a fraction of the current passing through the inductor and is controlled by variables resistor 7;

regulate only the heating temperature of the fraction at the outlet of the shot-blasted apparatus, for which the current through the coil and the inductance is reduced by the variable resistor 8, and the current through

The fraction is increased by a variable resistor 7. In this case, the interaction force between the electric fields of the shot and the inductance coil remains the same, the shot acceleration time in the shot-blasting apparatus remains the same, the flow through the shot is overestimated, and therefore the shot passing through the shot-blasting machine increases and the higher, the less current goes through the inductor and the more through the metal shot.

The use of the proposed shot-blasting apparatus reduces the cost and increases the reliability of operation of the apparatus, which is caused by simplifying the design of the shot-blasting apparatus, as well as increasing its performance, since it becomes possible to adjust the impact of the shot on the surface to be processed by adjusting the shot rate at the outlet of the shot-blasting apparatus, and becomes possible Metal shot from non-magnetic material.

Claims (3)

1. Drobemetny apparatus with the supply of shot to the treatment area through the acceleration tube installed in the housing, equipped with a magnetic field acting on the fraction of the inductance coil connected to the power source, characterized in that, in order to increase productivity and expand the technological capabilities of the shot blasting annarate, made in the form of a W-shaped magnetic circuit with a groove in the middle part, the acceleration tube being installed in the groove and provided with two contact electrodes located opposite to its B the inner walls along the entire length, on both sides of the plane, passing through the axis of symmetry of the middle part of the magnetic circuit parallel to its larger sides. 2. An apparatus in accordance with claim 1, wherein the contact electrodes are connected in series with the power supply of the inductor in series. 3. The apparatus according to claim I, which is connected with the fact that the contact electrodes are connected to the power supply circuit parallel to the inductor. 3 6 I (fuz .S