RU2765851C1 - Metal spraying apparatus for restoring the wear of a part - Google Patents

Abstract

FIELD: physics.SUBSTANCE: invention relates to the field of materials science, in particular, to restoration of worn metal parts. The apparatus for spraying metal onto the surface of a part consists of an electrode cathode configured to supply a negative direct current potential thereto, a metal powder sprayer configured to supply a metal powder by an air flow into the electric arc between the cathode and the restored part configured to be supplied with a positive potential, as an anode, solenoid, and electromagnetic inductor. The solenoid is configured to provide an electromagnetic field for retaining molten metal particles from the electrode and metal powder in said arc, directing and concentrating said particles on the restored part. The electromagnetic inductor is made for heating the restored part with an electromagnetic field with a frequency of up to 8 kHz.EFFECT: increase in the efficiency of restoration of a worn metal part by spraying particles and ions with the applied metal powder and material of an electrode is provided.1 cl, 1 dwg

Description

The invention relates to the field of materials science, in particular the restoration of worn metal parts.

It is technically and economically profitable and the production uses the restoration of worn metal parts of mechanisms relative to the manufacture of new ones.

It is known [1] recovery device fusing powder material on the worn part of the part. However, this device [1] has the disadvantage that the work efficiency is reduced due to the difficulty of dosing the powder material during welding.

It is known [2] a device for electric welding deposition with certain electrodes. This device [2] is also not devoid of the disadvantage that the electric welding method changes the structure of the metal at the site of welding.

It is known [3] a device for fusing powder material by the flame method (combustible gas): the powder is melted in a jet of combustible gas flame and applied to the place of deposition on the part. This device [3] has a small range of names (types) of powder due to their relatively low melting point.

The purpose of the technical solution proposed is to increase the efficiency of the restoration of a worn metal part by spraying particles and ions applied by bulk material and material from the electrode.

The essence of the proposed technical solution lies in the fact that: a device for spraying metal onto the surface of a part, characterized in that it consists of an electrode-cathode, made with the possibility of supplying a negative DC potential to it, a metal powder atomizer with the possibility of supplying metal powder with an air flow into an electric arc between a cathode and a part to be restored, made with the possibility of applying a positive potential to it, as an anode, a solenoid made with the possibility of providing an electromagnetic field for holding molten metal particles from the electrode and metal powder in the said arc, directing them and concentrating them on the part being restored and the electromagnetic inductor, made for heating the part to be restored by an electromagnetic field with a frequency of up to 8 kHz.

The proposed device operates as follows: the electrode 1 and the part to be restored 3 are located in the zone of the DC arc, in which metal particles from the electrode and the sprayed bulk material from the sprayer 9 are melted in the formed arc 2, deposited on the surface of the restored worn part 3. Arc 2 , the parameters of which are determined by the magnitude of the voltage applied to the electrode 1, at the terminals 6 of direct current and voltage can be corrected in direction, in space, by displacing the solenoid, inductor 4, a certain electrical voltage is applied to its terminals 7. Preheating of part 3 to a certain temperature , corresponding to the temperature in the arc 2, is achieved by the current and voltage supplied to the inductor 5 through its clamp 8 from a third-party source of high-frequency current and voltage.

The size of the particles from the mass of the electrode on the electric arc depends on the magnitude of the DC voltage applied to the clamps 6, and the intensity of the air flow supplied through the atomizer with loose metal powder.

A relatively small displacement of the arc is formed by a change in the position of the solenoid 4 in space, as well as a significant change in the space of the most restored part 3.

The performance, power, dimensions and design features of the proposed device depend on the parameters of the restored part: its weight, size and design.

Additionally, the necessary metal powder is applied by sprayer 9 to restore part 3 with air flow into the arc area 2. Three sources of electrical power used in the device are not galvanically connected to each other, that is, they have independent power sources.

Workflow scenario:

1. First, a loose material of fine dispersion, an oxidizing agent and an alloying material (additives) are sprayed onto the surface of the part using the included static field.

2. Next, turn off the field according to Clause 1 and turn on the high-frequency electromagnetic field to heat the part to a certain temperature, depending on the alloy composition of the part, the temperature parameters of the oxidizer and alloying material.

3. Further, without turning off, but adjusting the required temperature (as noted in Clause 2, it depends on the alloy of the part and the types of oxidizing agent and alloying materials (additives), as well as additional bulk material), apply the mass (volume) of bulk material necessary to restore the part .

Used sources

1. Patent No. RU 2113915 C1, Russian Federation, IPC B05B 13/06, B05C 7/08. A device for applying powder materials to the inner surface of cylindrical products. No. 94016715/25: App. 05/04/1994: publ. 06/27/1998 / Belinsky V.N., Novichkov V.I., Vorovchenko A.V., Akhmetshin R.S. - 4 s.

2. Patent No. KZ 864, Republic of Kazakhstan, IPC V23K 9/04. Method of arc welding of crankshafts. No. 3635648/25-27: Appl. 12/03/1993: publ. 06/15/1994 Bull. No. 2 / Iminov M.I., Egorov V.P., Struchkov V.V. - 4 s.

3. Patent No. RU 44067 U1 Russian Federation, IPC B05V 7/00. Device for applying a protective coating of the surface: No. 2004124793/22: Appl. 08/16/2004: publ. 02.27.2005 / Vorovchenko A.V., Akhmetshin R.S. - 5 s.

Claims (1)

A device for spraying metal onto the surface of a part, characterized in that it consists of a cathode electrode configured to supply a negative DC potential to it, a metal powder sprayer capable of supplying metal powder with an air flow into an electric arc between the cathode and the part to be restored, configured to supply a positive potential on it, as an anode, a solenoid designed to provide an electromagnetic field for holding molten metal particles from the electrode and metal powder in the said arc, directing them and concentrating them on the part to be restored, and an electromagnetic inductor made to heat the part to be restored by an electromagnetic field with frequency up to 8 kHz.

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