SU1409400A1 - Automatic die for extrusion of hollow parts of bushing type - Google Patents

Abstract

The invention relates to the processing of metals by pressure, in particular to devices for cold extrusion, and can be used for H1 stamping hollow parts of tin sleeves. The goal is to increase productivity and expand technological capabilities in tampa. The matrix loading unit is placed on the bottom plate side and is installed with the possibility of reverse mixing. The node is made in the form of a revolving disk and a spring-loaded cradle with a grip and a locking lever that interacts with the mechanism of the periodic rotation of the disk. In the process of machining, the coBepiuaer blanks are interchangeable between the machining positions, per.ia-mented by moving the punch processing tools. This makes it possible to combine the calibration and splicing operations in one Pittamp. 4 il.

Description

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The invention relates to the processing of metals by pressure, in particular cold extrusion, and can be used to stamp hollow parts such as sleeves.

The aim of the invention is to increase productivity and expand the technological capabilities of the stamp.

FIG. 1 shows section A-A in FIG. 2, a stamp with the positions of the shaping and the through flashing (reverse extrusion); in fig. 2 - stamp at conventionally removed top plate, top view; in fig. 3 - section B - B in FIG. 2, a stamp with a semi-finished product transfer position to a through-firmware position and a through-firmware position; in fig. 4 is a view of B in FIG. 2, an embodiment of a node for periodically engaging the feed blade with a mechanism for rotating the turret disk.

The punching machine contains mainly the following positions evenly spaced around the circumference; loading the blanks, shaping, checking, transferring the semifinished product to the feed plane for the through flashing (reverse extrusion), two "free positions at which the flange can be disembarked, the straight extrusion of the sleeve with wall thinning, calibration, etc., as well as the removal position finished sleeve on the discharge tray.

The stamp contains a movable top plate 1 with punches fixed on it. 2, 3 (Fig. 1), pusher 4 (Fig. 3), hops (not shown) to control the health of the stamp.

On the lower fixed plate 5 of the punch, the matrix for molding 6, counterpansons 7 and 8 is placed. The matrix for through-piercing 9 to enable loading of workpieces into it from below is placed in the intermediate plate 10, which is vanquished. It is spring-loaded to the bottom plate 5 and has the ability to vertically mix along the counter-punch 8, the guide columns 11 (Fig. 3). The counter-punch 8 is provided with a receiving sleeve 12 which extends around its movable spring-loaded bottom to the matrix 9, protruding above the working end of the counter-punch 8 with an opened stamp and provided with a gripper made, for example, in the form of jaws spring-loaded to each other.

On the shaft 13 between the top 1 and bottom 5 plate, above the dies 6 and 9, there is a revolving disk 14, spring-loaded from below to the shoulder of VA-13 and from above to the top plate of 1 stamp, a disk. The disk can move along the keys fixed on shaft 13 (Fig. 1).

For placing workpieces, semi-finished products, parts, and transferring them from one position to another in the slots of the revolving disk 14, evenly around the circumference are installed slots equipped with gripping bodies. At the position of pass-through firmware over

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a revolving disk is provided with a puller 15 moving along guide columns 16 (Fig. 2) fixed in the intermediate plate 10 and spring-loaded to it. A pneumatic cylinder 17 is installed on the lower plate 5 of the shtamp, intended for periodic rotation of the revolving disk 14 through the ratchet wheel 18 fixed on the same shaft 13 with the revolving disk 14. Between the positioning and piercing positions, the position of the semi-finished product from the disk through the nozzle 19 is located using the ejector 4 to the lower feed plane. The stamp is equipped with a node loading the matrix 9 from the bottom side of the counter-punch 8 pre

 calibrated blanks. This assembly is located between the positions of the transfer of the semifinished product and the end-to-end firmware. He is able, due to the periodic engagement with the ratchet wheel, to supply the semi-finished product to the receiving sleeve 12 to the position of the pass-through firmware. The load node is made in the simplest version, in the form mounted on the shaft 13 of the rotary lodgement 20 with the grip, made, for example, in the form of jaws, spring-loaded to each other (not shown). For periodically engaging a lodgement 20 with a ratchet wheel 18, an engagement assembly is used, for example, in the form of a lever arm 23 spring-loaded with a spring 22 installed on the axis 21 swinging on the axis 21. 24, fixed in the intermediate plate 10. The return spring 25 and the stop 26 serve to return the cradle 20 to the initial position. In the upper nlit 1, the sleeves 27 are rigidly fixed, which serve for lowering the intermediate plate 10, spring-loaded to the lower plate 5 by means of springs 28, and in order to limit the lifting of plate 10 with matrix 9 on

0, the height allowing the loading of semi-finished products into the through-piercing matrix from below, serves as stops 29 fixed to the bottom plate 5.

The stamp machine works as follows.

In the upper position of the press ram, the workpiece from the vibrating hopper is pushed into the slot of the revolving disk 14 by means of a loading mechanism (not shown). The gate of the revolving disk 14 mounted on the shaft 13 is pushed through the ratchet wheel 18 from the pneumatic cylinder shaft 17. Fixing the ratchet The wheels 18, and hence the revolving disk 14, are produced by a spring-loaded canine (Fig. 2).

In the course of the press slide down, the workpiece is pushed from the turret disc 14 by the punch 3 to the die 6, where

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a fitting operation occurs (Fig. 1). As the slider moves upward, the semi-firik is pushed into the slot of the disk 14 of the counter-punch 7. At the next position, the control of the fitting operation is carried out.

By turning the disk 14 at the next angle, the semifinished product is moved to the next position - the transfer position. When the press crawl moves downwards, the pusher 4 transfers the semifinished product to the cradle 20 provided with a catch and which is due to the spring in the initial position through the nozzle 19. After the slider returns to the upper position, the next rotation of the disk 14 takes place. The lever 23 of the bed 20 is in engagement with the ratchet wheel 18 (FIG. 4), as a result of which the lodgment 20 rotates synchronously with the ratchet wheel 18, moving the semi-finished product to use the through firmware (reverse extrusion) into the receiving sleeve 12, provided with a gripper, made, for example, in the form of spring-loaded sponges, and projecting with the opened position of the stamp above the counter-punch 8 so that the window of the sleeve is under the butt of the counter-punch 8 (Fig. 3). At this point, in the matrix 9, raised together with the intermediate plate 10 under the action of springs 28 (but it is possible, for example, with the help of tg fixed rigidly in the upper plate) above the counter-punch 8 to the height of the receiving sleeve 12, one or two pre-shaped blanks held in the cavity by friction forces on contact surfaces, filed during previous moves.

At the beginning of the slide stroke, the sleeves 27 press on the intermediate plate 10, and the pin 24 fixed in the intermediate plate 10 acts on the spring-loaded lever-clamp 23, turning it around the axis 21 and disengaging from the ratchet wheel 18 (Fig. 4 ). Due to this, and under the influence of the return spring 25, the lodgement 20 returns to its original position up to the stop 26 (Fig. 2). With the further course of the gyu. On the 13th press down, the matrix 9, fixed in the plate 10, is lowered onto the counter-punch 8, and

The punch 2, inserted into the upper billet, pierces it through and enters the middle billet in such a way that the propriet bushing is above the worker over the bushing 2.

Under the action of elastic forces, the internal diameter of the sleeve extruded from the top blank becomes smaller than the diameter of the worker of the punch 2, which ensures its removal together with the punch from the matrix 9. When the press slide moves up, the resulting sleeve rises along with the punch 2 and is removed from it with the aid of the puller 15 and remains clamped in the socket of the turret disk 14. When turning

From disk 14 to the unloading position, the finished part is pushed onto the tray and removed to the container (Fig. 2).

Claims (1)

Invention Formula 0 Automatic punch for extruding hollow parts such as bushings containing movable and stationary support plates with deforming tools, intermediate plate with die, puller, revolver disk with uniformly circumferential positions for shaping the workpieces, transferring and extruding, periodic disk rotation mechanism as well as a unit for loading blanks into a matrix, characterized in that, for the purpose of controlling 0 productivity and expansion of technological capabilities, it is equipped with a pusher, placed on the position of the prefabrication, mounted on the top plate, the node loading the blanks into the matrix is placed between the intermediate and lower 5 plates with the possibility of reversible movement between the positions of the revolving disk and made in the form of a spring-loaded cradle with a grip and a locking lever installed rotatably around the axis of rotation of the revolving disk, while the said locking lever is installed with the possibility of interaction with the mechanism of the periodic rotation of the disk , and the intermediate plate and the revolving disk are installed with the possibility from vertical reciprocating movement. 0 -A Fig1 ID W Fig.Z cpup4