RU185234U1 - INSTALLATION FOR PRODUCING PRODUCTS FROM POWDERED MATERIALS - Google Patents

Abstract

The INSTALLATION FOR PRODUCTION OF PRODUCTS FROM POWDER MATERIALS A useful model relates to powder metallurgy, namely, to installations for producing complex parts from powder materials, dispersion-strengthened materials by hot pressing in a reducing medium. The technical result is an increase in the quality of pressing by reducing the difference in physical and mechanical properties on the upper, side and end surfaces of products, increasing the productivity of pressing and tooling durability. Technical result for is achieved by the fact that the apparatus for producing products from powder materials, comprising a housing configured to create a reducing medium inside it, and a hot-pressing mold placed in it, according to a utility model, the mold contains a punch on which an ultrasonic ring is fixed providing a feed to the punch of ultrasonic vibrations, a matrix that includes a plate consisting of two half plates, heated by supplying current to tubular electric heaters located at the junction of luplit, and an insert that allows forming parts of a wide range, with the possibility of controlling the temperature of its heating by a thermocouple, ejectors fixed between two plates, one base plate, which receives loads from the ejection forces and is rested against the stop in the initial position, and a fixing plate, with this case is equipped with a cooling unit designed to cool the workpieces after sintering, consisting of a conveyor belt made of scale-resistant wire, a driving pulley, a driven pulley, a copper tube with continuous circulation of water entwined around the outside of the refrigerator.

Description

B22F3 / 14

Installation for receiving products from powder materials

The utility model relates to powder metallurgy, and in particular, to installations for producing parts of complex shape from powder materials, dispersion-hardened materials by hot pressing in a reducing medium.

A known device for pressing articles of powder materials containing a matrix, a punch, a loading chamber and an electromagnetic vibration exciter (patent No. 73251, B22F 3/087 (2006.01), 01/09/2008, Device for pressing bimetallic products from powder); containing a press die, an inductor for heating the matrix, a hopper (Patent No. 2029661, B22F 3/08 (1995.01), 02/27/1995, An apparatus for impact pressing powder products), containing a mold, a hopper with a dispenser, a pusher and a vacuum - chamber (patent No. 2047493, B29C 43/02, 10.11.1995, Installation for pressing products from powder materials).

The prototype of the claimed utility model is an invention (No. 2212341, B32B 31/20, 09/20/2003, Method for hot pressing products from composite material and a device for its implementation), containing two dies, matrix and punch heaters, a sealed housing with a vacuum pump system and system inert gas inlet.

A disadvantage of the known technical solutions is the low quality of the pressing, due to the decrease in the density of the material of the pressed product along the compression cross section in the vertical plane and in the corners of the pressing, uneven heating of the materials, low stability of operation and a long mode, due to the fact that the entire heating - cooling process takes place in the working chamber.

The technical result is an increase in the quality of pressing by reducing the difference in physical and mechanical properties on the upper, side and end surfaces of the products, increasing the productivity of pressing and tool life.

The technical result is achieved by the fact that the apparatus for producing products from powder materials, comprising a housing configured to create a reducing medium inside it, and a hot-pressing mold placed in it, according to a utility model, the mold contains a punch on which is fixed an ultrasonic ring that supplies ultrasonic vibrations to the punch, a matrix that includes a plate consisting of two half plates, heated by supplying current to tubular electric heaters, p half-plates located at the junction, and an insert that allows forming parts of a wide range, with the possibility of controlling the temperature of its heating with a thermocouple, pushers fixed between two plates, one base plate, which receives loads from the pushing forces and is rested against the stop in the initial position, and fixing the stove, while the casing is equipped with a cooling unit designed to cool the workpieces after sintering, consisting of a conveyor belt of dross-resistant wire, a driving pulley, driven a pulley, a copper tube with continuous circulation of water, entwined around the outside of the refrigerator.

The utility model is illustrated in the drawing.

The figure shows a side view in section of the installation for receiving products by pressing.

In the housing 1, the lower end of which is mounted on the table 2 of the hydraulic press, and the upper end is attached to the upper fixed plate 3 of the press, a mold is installed, which consists of a matrix 4, a heated punch 5, insert 6, a heated plate 7, consisting of two half plates, tubular electric heaters 8, thermocouples 9, guide column 10, bushings 11, ejectors 12, base 13, upper plate 14, lower plate 15. Ejectors 12 are mounted between two plates, one base plate 16, which accepts loads from the ejection forces and in the initial position rests on the stop 17, and the fixing plate 18. The movement of the plates 16, 18 when removing the pressing is carried out along the guide columns 19, the guide sleeves 20 using the rod 21 of the lower hydraulic cylinder of the press (not specified).

An ultrasonic ring 22 is fixed to the punch 5, which is driven by the generator 23.

The system for supplying powder material to the matrix consists of a hopper 24, a hydraulic cylinder 25, a dispenser 26 with a pusher 27 that moves along the guides 28. The window of the dispenser 26 is closed by a lid 29 moving along the guides inside the dispenser 26. The cover is torn off by its engagement with the matrix, value the opening of the lid is regulated by a spring 30 and an adjusting screw 31.

To move the compact from the surface of the mold into the cooling unit, slip 32 is used.

The cooling unit consists of a conveyor belt 33 made of dross-resistant wire, a driving pulley 34, driven by an electric motor (not specified), a driven pulley 35, a copper tube 36 and a cooling chamber 37. Storage of the workpieces is done in the receiver part 38.

Principle of operation:

In the initial state, the punch 5 is in the upper position, so that to fill the material into the cavity of the insert 6, which is located in the heated plate 7. The plate 7 is heated by supplying current to the tubular electric heaters 8, the temperature of the heating of the insert 6 is controlled by a thermocouple 9. Ejectors 12 are lowered down. The pressing cycle begins with the feeding of the charge from the hopper 24 to the dispenser 26, when filling the volume of the dispenser 26, the rod of the hydraulic cylinder 25, which is fixedly connected to the end face of the dispenser 26, moves the dispenser 26 with the pusher 27 to the cavity of the insert 6. As the drain hole of the dispenser 26 approaches the cavity of the insert 6, the cover of the dispenser 29 is hooked over the edge of the matrix 4. With further movement of the dispenser 26, the cover of the dispenser 29 opens and the charges are fed into the cavity of the insert 6. After filling the cavity of the insert 6, the dispenser 26 with the pusher 27 returns to its original position. putting the rod of the hydraulic cylinder 25, while the cover 29 moves along the guides inside the dispenser 26 and closes under the action of the spring 30. The punch 5 is moved to the matrix 4 and close the mold.

When the punch 5 is inserted into the cavity of the insert 6 filled with the charge, ultrasonic vibrations are applied to the punch, through the ultrasonic ring 22, the effect of which also transfers to the charge, it is heated to 0.5 - 0.9 of the melting temperature of the main component of the charge. which provides a denser arrangement of particles relative to each other.

After holding the compact under pressure and temperature, the punch 5 rises up, and the compact is removed. Removing the pressing is performed by ejectors 12, which rise up when the rod 21 of the lower hydraulic cylinder of the press (not specified) is lifted to the end of which the base plate 16 is fastened. After extruding the workpiece, the ejectors 12 are lowered down, the dispenser 26 with the pusher 27 approaches the rod of the hydraulic cylinder 25 the cavity of the insert 6, the pusher 27 moves the workpiece to the slid 32 and the cavity of the insert 6 is filled with a charge, the pressing process is repeated again.

After the workpiece slides along the slice 32, it enters the cooling unit on the conveyor belt 33 of the conveyor. The cooling of the workpieces is carried out by continuous pumping of water through a copper tube 36, entwined around the outer side of the cooling chamber 37. Then, the parts enter the parts of the successor.

The process of pressing, sintering and cooling is carried out in a reducing environment.

The charge is supplied to the forming part in the dispenser 26, when the mold is closed, ultrasonic vibrations are applied to the charge through the punch 5 and it is heated to 0.5 - 0.9 the melting temperature of the main component of the charge, after the pressing and sintering under compression pressure, the workpiece is pressed and cooled in a refrigeration unit. The process of pressing, sintering and cooling is carried out in a reducing environment.

Claims (1)

1 Installation for producing products from powder materials, comprising a housing configured to create a reducing medium inside it, and a hot-pressing mold placed in it, characterized in that the mold contains a punch on which an ultrasonic ring is fixed, which supplies to the punch of ultrasonic vibrations, a matrix including a plate consisting of two half-plates heated by supplying current to tubular electric heaters located at the junction of half-plates, and an insert which wants to carry out the molding of parts of a wide range, with the possibility of controlling the temperature of its heating by a thermocouple, ejectors fixed between two plates, one base plate, which receives loads from the pushing forces in the initial position supported against the stop, and a fixing plate, while the case is equipped with a cooling unit, designed for cooling preforms after sintering, consisting of a conveyor belt of a dross-resistant wire, a driving pulley, a driven pulley, a copper tube with continuous circuits water entwined around the outside of the refrigerator.

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