SU1225692A2 - Apparatus for applying coatings of metal powders onto external surfaces of metal articles - Google Patents

Description

The invention relates to powder metallurgy, in particular, to devices for coating with carbide powders on the outer surfaces of metal products, namely, to the chamfer of the valve of an internal combustion engine, and is an improvement of the device according to the author. St. No. 619296.

The purpose of the invention is to expand the technological capabilities of the device by controlling the pressing force generated by the clamp.

FIG. 1 shows the device in a static state; in fig. 2 - the same in the process.

The device consists of a support 1, contacts-ruyupdey with a non-metallic matrix 2 of the guide sleeve 3, and a heat source 4 in the form of an HDTV inductor.

In the groove of the support 1 there is a clamp 5, made in the form of a bimetallic element and insulated from the heating source by a box-shaped frame 6 made of heat conductor w, its material, for example asbestos, and mounted with the possibility of moving the vertical direction.

A non-contact temperature sensor 7, for example a radiation pyrometer, the output of which is connected to the input of the temperature recorder 8, is installed in the zone of the heating source 4. The output of the latter is connected to the input of block 9 of the task, which is connected to the regulated power source 10. The clamp 5 is connected via current leads 11 and ring current collectors 12 to an adjustable source 10 of power. The device is installed in assembled form with the possibility of installation in the centers 13. Under the clamp 5, there is a heat insulating plate 14.

The device works as follows. In support 1 place the item, non-metallic matrix 2, fill the necessary

five

0

five

0

dose of metal1 o powder and install guide sleeve 3 on the shank of the part.

The device assembly is arranged so that the inductor ring covers only the powder zone. Turn on the rotation of the drive with simultaneous heating of HDTV. The metal powder under the action of centrifugal forces moves in the direction of the clan chamfer.

Upon reaching a predetermined temperature detected by the temperature sensor 7, the temperature recorder 8 outputs a control signal to the task unit 9, which controls the regulated power source 10. The latter provides the specified value of the supply current passing through the clamp 5 by means of ring current collectors 12 and current leads 11. The clamp 5, under the action of an electric current, moves the part upwards along its axis of rotation, thus pressing the mixture of metal powder molded by centrifugal forces, iia valve face. The required pressing force at a given heating temperature is set by presetting the task block 9.

After turning off the rotation and the source of heating, the temperature recorder 8 issues a signal to the unit 9 to set off the power supply 10, the coated part returns to its original position.

The application of the proposed device allows, along with noBbinjcHHEM productivity, to apply coatings on the same device from materials with different sintering temperatures with the required pressing force. This makes it possible to obtain products with the exact thickness of the applied coating and to reduce the allowance for the pic: 1 the next mechanical treatment.

VNIIPI Zakan 1922/1 (1I nrazh 7o7 Podpshchus

Branch "Patent, Uzhgorol, vji. Projectgke 4

Claims (1)

METAL COATING DEVICE POWDERS ON EXTERNAL SURFACES OF METAL PRODUCTS by ed. St. No. 619296, characterized in that, in order to expand the technological capabilities of the device by providing control of the pressing force created by the clamp, it is equipped with a heat supply system made in the form of a temperature sensor, a temperature recorder, a reference unit and a power supply connected in series, connected to a heat supply system using current leads and ring current collectors. Figure 1 SU, „, 1225692