SU1459747A1 - Arrangement for reverse extrusion with active friction - Google Patents

Abstract

The invention relates to the processing of metals by pressure and can be used in extrusion with active friction. The purpose of the invention is to improve the quality of products by providing the possibility of a smooth change in the speed of the plunger of the overpressure cylinder during the technological course. The technological pressing force is created by the stroke of the main plunger. The support is provided by the force of a support cylinder (1SH) mounted on the drain plunger. During pressing, the working fluid is discharged from the working cavity U through a hydraulic shut-off valve (G) with an independent drive providing reciprocating movement of the piston rod and spool-loaded piston located in housing G. Measurement of the frequency of activation of the piston center and, accordingly, the speed of movement of the plunger of the control center is adjusted by changing the speed rotation of the actuator of the autonomous drive mechanism G. The device both, makes it possible to control the process of reverse pressing with optimal technological conditions 4 il. w with /)

Description

The invention relates to the processing of metals by pressure and can be used in extrusion with active friction.

The aim of the invention is to improve the quality of products by providing the possibility of smoothly varying the speed of the secondary cylinder plunger during the technological course. :

FIG. 1 shows a diagram of a device for reverse compression with active friction; in fig. 2 - scheme of filling the working channel with liquid; in fig. 3 is a diagram of the discharge portion of the liquid; Fig. 4 is a diagram of the return of the hydro-pusher elements to their original position.

A device for reverse friction pressing with an active friction consists of a main plunger 1, a cylinder 2 of a backwater and a plunger 3 of a backwater, a container 4, a ram 5, a die 6, a billet 7 and a hydraulic sectioning unit consisting of a body 8 with a cylindrical cavity 9j supply ports 10 and removal of the working fluid 11, the piston 12 with the rod 13, ending with the thrust washer 14, and the spring 15 is rotatable on the rod 13 with the ability to move, as well as an annular

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Capture 16. In the housing 8, a baffleter 17 is provided. The stem 13 is connected externally to the actuator of the automatic drive 18.

The device works as follows.

A billet 7 is fed into container 4. With the stroke of the main plunger 1, a ram 5 is inserted into the conveyor 4, a die 6 is pressed, the billet 7 is pressed and the mold is pressed.

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House of the main plunger 1. During the compression, the working fluid from the cylinder 2 of the backwater is supplied to the opening 1–10 of the hydraulic section feeder. The auto- {ohm drive 18 of the hydroseater produces a reciprocating movement of the rod 13 with a frequency determined by the required. In the given technical process the speed-. a plunger 3 growth. By varying the frequency of operation of the hydroseater, the speed of the plunger 3 of the backwater varies arbitrarily. When p | oshn 12 is in the extreme left position through the opening 10 for supplying the filling fluid with the working fluid, it is cylindrical and the cavity of the hydroseater body. lipH during the stem 13 from the leftmost end of the feed hole 10 is re-ripped by the piston 12, the hole 11 o; the lead opens with the annular piston 16. With the further stroke of the stem 13, the outer piston 16 stops at the boundary 17, the spring 15 compresses-1Tc and fluid from the cylindrical cavity of the hydroseater body by the piston 12 is displaced through the outlet 11 to close the piston 12 with the annular piston 16. Next, with the actuator 18, the rod 13 is retracted to the extreme left, the position, by spring 15 the annular piston 16 is retracted until washer 14, otv The removal outlet 11 is closed by an annular piston 16,

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The supply port 10 is opened by the piston 12, the cycle is repeated.

The technical and economic efficiency of the invention is to increase productivity by increasing the average maximum allowable flow rate, improving the quality of products by ensuring smooth independent control of the flow of material and increasing the processability level.

Claims (1)

Invention Formula A device for active-friction reverse pressing, comprising a main plunger with an overpressure cylinder, mounted in the working chamber of the container, a ram placed on the piston of the backwater cylinder, and a die located in the container's working chamber on the side opposite to the main container plunger, characterized by that, in order to increase the quality of the products due to: Ensuring the possibility of a smooth change in the speed of the cylinder plunger of the overpressure during the technological course, it is equipped with a hydraulic separator, with The booster cylinder is single with a pa-i barrel cavity, and an independent hydraulic subdivider drive with an actuator; the hydraulic valve is made in the form of a body with a cylindrical cavity and openings for supplying and discharging working fluid placed in the edge sections of the body cavity installed in the piston body cavity with the rod pivotally connected to the actuator of the autonomous drive, fixedly mounted on the end of the rod by a thrust washer mounted on the rod of the annular piston and the spring placed between pistons ; about j ) (one pressing i f i I I 8V 12 / 0h XnrWAI L / A L + i + / 7; j 75 16 u  / / 7; j / 7 Phie.1 W Phys .2 AE1C A 1ASHIMsh., 12 Fi &. sixteen