RU31118U1 - Device for electrical contact surfacing with ferromagnetic powders - Google Patents

Description

at 23 to 11/06

Device for electrical contact surfacing f) magnetic

The invention relates to methods for producing coatings of powder materials and can be used to restore and harden mainly the outer cylindrical surfaces of machine parts,

A known installation for surfacing crankshafts, comprising a base, cartridges for rotating the workpiece, guides parallel to the axis of the cartridges, on which a support is mounted with a spindle, a welding head mounted on it, including a support element, levers with roller electrodes pivotally mounted on it placed in one vertical plane perpendicular to the axis of the cartridges, and power cylinders for compressing levers, and the supporting element is made in the form of a bottom and vertical the rear and rear walls with openings interconnected by parallel horizontal guide rods mounted perpendicular to the caliper guide, a carriage with a power cylinder is mounted on the guide rods to move it, brackets with hinges are mounted on the upper and lower surfaces of the carriage to secure the levers in their middle part, power cylinders for compressing the levers are mounted on the support element with the possibility of interaction with the free ends of the levers, while the shoulder of the lower arm is equipped with with a roller is placed in the opening of the front vertical wall of the support element, and the power cylinder for moving the carriage is located in the opening of the rear vertical wall of the supporting element.

powders

RF patent No. 2071890 MKI: 6V 23K 11/06 publ. 01/20/97

The closest analogue to the present invention is a device for electrical contact welding with ferromagnetic powders, containing roller electrodes, the axes of which are located in the same plane, the rotation drive of the deposited part, the electrode pressing mechanism, their movement mechanism, welding transformer, the secondary winding of which is connected to the electrodes and the metering hopper with an outlet, while in order to reduce the consumption of electromagnetic powder and increase the stability of the quality of surfacing by automatic In order to regulate the flow rate of ferromagnetic powder, the axes of the roller electrodes are mounted in a vertical plane, and the lower roller electrode is equipped with two gear rims made with diameters not exceeding the diameter of the roller electrode and fixed at its ends, and the outlet of the hopper is located above the teeth of one of the rims in front of the working zone along the process. Copyright svidegellegvo №1637979 MKI: 5V 23K 11/06 publ. 03/30/91 & ol. # 12

The technical result includes increasing the productivity of the process of electrocontact surfacing by using two roller electrodes, as well as improving the quality of the formed coating due to the use of tubes of ferromagnetic material interacting with electromagnets and providing a decrease in the washing off of the powder when cooling water is supplied to the weld-in zone.

The achievement of this result is achieved due to the fact that the device for electrical contact surfacing with ferromagnetic powders contains a rotation drive of the deposited part, roller electrodes, the axes of which are located in a vertical plane, the pressing mechanism and

moving electrodes, welding transformer, the secondary winding of which is connected to the electrodes, a hopper with an outlet. In addition, the device is equipped with two tubes for supplying a cooling medium to the surfacing zone, as well as two tubes made of ferromagnetic material. Each tube is equipped with a screw for feeding ferromagnetic powder from the hopper. The lower hole of the hopper is connected to the channel of the tube supplying the powder to the surfacing zone. An electromagnet is installed outside of each tube of powder supply No. 11a, for which a tube of ferromagnetic material serves as a core. One end of the tube is equipped with a drive for the screw, and the other is located in the contact zone of the roller electrode and the part.

A device for electrical contact surfacing with ferromagnet powders is illustrated in the drawing of Fig. 1 and includes roller electrodes 1, a welding transformer 2, a hopper 3, two tubes for supplying a cooling medium to the surfacing zone 4, two tubes of ferromagnetic material 5, equipped with a screw 6 for supplying ferromagnetic powder 7 from the lower hole of the hopper 3 into the channel of the tube Z, feeding powder into the surfacing zone. Outside of each tube 5 for supplying powder 7, an electromagnet 8 is installed, for which tube 5 serves as a core. One end of the tube 5 is provided with a drive for the screw 6, and the other is located in the contact zone of the roller electrode 1 and part 9.

The device operates as follows: the roller electrodes 1 are pressed against the part 9. The cooling medium is turned on through the tubes 4, the ferromagnetic powder 7 under the action of gravity comes from the hopper 3 to the screw 6 of the feed tube 5. The tubes 5 are made of ferromagnetic material and pre-magnetized so that their ends are magnetic poles. The screw 6 is driven by a drive, carrying out

powder transportation 7 to the welding zone. Particles of powder 7 are fixed at the end of the feed tube 5 by an electromagnetic field. Turns on the rotation of the part, the longitudinal movement of the roller electrodes 1 along the axis of the part 9 „, the surfacing current is supplied through the transformer 2 and the surfacing process is carried out.

The inventive device for electrocontact surfacing with ferromagnetic powders is made in the form of a construction in which the surfacing process is carried out by feeding powder under two roller electrodes, which increases the productivity of the process of electrical contact surfacing, and the quality of the formed coating is improved by using two ferromagnetic tubes for feeding the powder into quality of the core of electromagnets, while this prevents the crushing of the ferromagnetic powder by the coolant.

Claims (1)

A device for electrical contact welding with ferromagnetic powders, containing a rotational drive of the deposited part, roller electrodes, the axes of which are located in a vertical plane, a mechanism for pressing and moving the electrodes, a welding transformer, the secondary winding of which is connected to the electrodes, a hopper with an outlet, characterized in that it is equipped with two tubes for supplying a cooling medium to the surfacing zone, as well as two tubes made of ferromagnetic material, each of which is equipped with a screw for the supply of ferromagnetic powder from the hopper, while the lower hole of the hopper is connected to the channel of the tube supplying powder to the weld zone, an electromagnet is installed outside each powder supply tube, for which the tube of ferromagnetic material serves as a core, and one end of the tube is provided with a drive for the screw, and the other is located in the contact zone of the roller electrode and the part.