SU550214A1 - Stamp for extrusion - Google Patents

Description

one

The invention relates to the field of metal forming and can be used for the manufacture, mainly by cold deformation, of hollow and core products with thicker silt and flange on the outer surface.

Known sta-ml 1 containing a punch, rigidly connected to a press crawler, and a fixed matrix mounted on the bottom plate. Under the action of Luanson's reinforcement, the working cavity is filled up. Loose matrix, however, one-sided supply of metal leads to a lack of structure of the product, as well as to an increase in consumption.

Also known is a stamp for extrusion 2, containing the upper plate with the upper punch, as well as the lower plate with the lower punch and the matrix installed in the container.

However, it doesn’t provide the same for TBTbix and core parts with thickening of the silt and flange on the outer surface.

To improve the quality and improve the nomenclature of the resulting products in the proposed die, the matrix is made in the form of two semi-matrixes, one of which is fixed to the top plate and spring loaded, and the second is installed in the container with the possibility of vertical changes1 from the top plate

by means of an intermediate mechanism, while the intermediate mechanism can be made in a vnde mounted on the upper plinth of at least the two vertical wedges, each of which is mounted with the ability to interact with the corresponding horizontally positioned spring-loaded wedge mounted on the plate and acting on the wedge under the corresponding hemisphere - nickname; The mechanism can be shown as two pairs of interconnected cylinders mounted under the bottom plate, the pistons of one of which are rigidly connected to the top plate, and the pistons of the other affect the corresponding matrix; the intermediate mechanism can be made in the form of a lever mounted on an axis fixed on the bottom plate with the possibility of rocking motion in a vertical plane, at the end of which the rod connected to the top plate is pivotally fixed, while the lever in the middle part has a protrusion acting on the corresponding semimatrix.

FIG. 1 shows the proposed stamp, general view, section, in FIG. -) Different variants of the intermediate mechanism.

The stamp for extrusion contains a punch 2 installed in the upper plate 1. With the upper ejector 4 placed above it through the supporting disk 3; The upper louder matrix 8 is inserted into the upper plate 1 by means of the fingers 5 and loaded with springs 6 through the support ring 7. A container 10 is attached to the lower plate 9 of the die, in which the lower semi-matrix 11 is vertically mounted.

In the vertical through (Cavity of the semi-matrix And placed the punch 12, resting on the gasket 13, in which the lower ejector 14 is positioned. Limiters 15 are designed to terminate the vertical movement of the lower semi-matrix 11 during the removal of the finished piece.

During cold extrusion, the semi-matrices are made bandaged and with the bandages attached to the inserts, along a conical surface. At the same time, the smaller bases of the truncated cones of the inserts of the semi-matrix 8 and 11 are directed towards E) ugu. Prn closure of the semi-matrix 8 and 11 form a working cavity 16.

In the stamp there is a support element 17 (made in the simplest case in the form of a ring), on which the lower half-matrix 11 directly rests. The support element 17 is mounted with the possibility of vertical movement and is equipped with an intermediate mechanism that serves to transfer movement from the upper plate 1 to the lower half-matrix And the purpose of its movement in the direction of the deforming force of the punch with a speed less than the speed of movement of the punch 2 (press ram or top plate), twice I HO.

Intermediate mechanism B1 includes (at least two) three wedge mechanisms consisting of the following links; of a vertical wedge 18 attached to the upper plate 1, a horizontal spring-loaded wedge 19 and attached to the support element 17 of the wedge slider 20. These (two) three mechanisms are placed equally remotely relative to the vertical axis of the stamp.

Shta.n. works as follows. The blank 21, preferably cold, is placed on the end face of the punch 12 into the cavity of the semi-matrix I, which is at this moment in its upper position.

The supporting element 17, the upper plate 1 with its associated parts and the vertical wedge 18 are also in the upper initial position. When the press slide is inserted, the upper plate I, pull-in unit 2 and the half-matrix 8 also move downwards. First, the semi-matrix 8 enters the container 10, is centered and comes into contact with the lower semi-matrix 11, thereby forming the working cavity 16. At the same time, it comes in contact with the workpiece 21 and the punch 2, which moves before contacting its disc 3.

The upper plate 1 compresses the springs 6 downwards, the punch 2 deforms the workpiece 21, and the metal fills the cavity 16.

Simultaneously with the start of deformation

an intermediate mechanism, consisting of elements 18, 19, 20, is also activated, which leads to lowering of the support element 17 at a speed less than the speed of movement of the punch 2 twice. In the same way

and (semi-matrix 8 and 11 together) moves at the same speed, which keeps the height of the cavity 16 unchanged.

After the completion of the bilateral extrusion, the plate 1 rises, and the parts of the stamp

return to the starting position.

The removal of the finished product is performed by the ejector 4 or 14, depending on which semi-matrix the product remains. In the following, the stamping cycle is repeated.

The gap mechanism (Fig. 2) can be made in the form of a lever 22, which oscillates in a vertical plane around an axis 23 mounted on the bottom plate 9.

Pia the end of the lever 22 pivotally mounted rod 24 attached to the top plate 1, and in the middle part of the lever is provided with a protrusion 25 on which the supporting element 17 lies freely.

A third embodiment of the conversion mechanism is a hydraulic system comprising at least two pairs of interconnected cylinders 26 and 27 mounted under plate 9. In

the cylinder 26 moves the piston 28 rigidly connected to the plate 1, and the cylinder 27 houses the piston 29, on the rod of which also (as in previous designs) the support element 17 lies freely.

The total area interacting with the working fluid of the pistons 29 is twice as large as that of the group of pistons 28, as a result of which the speed of lowering the pistons 29 of the support element 17 is two times smaller than the speed of movement of the upper movable part of the device, the punch 2.

Thus, in the stamp for extrusion of metal products, deformation with two-sided supply of metal to the deformation zone is relieved, thereby reducing the heterogeneity of the structure and degree of strengthening over the section of the product, which contributes to an increase in the operational properties of the products.

The reduction in the non-heterodonic deformation also contributes to the reduction in the required deformation force. Due to the uniform - bilateral metal supply, the thickening has the correct form, the mushroom shape disappears

flanges, the quality of the stamped products is improved.

Eliminating distortion of the shape of the thickening causes an increase in productivity, since there is no need for

machined.

Claims (4)

1.Stamp for extrusion, containing the top plate - with the top puaison, as well as the same plate with the lower panel and installed in the container with a matrix, characterized in that, in order to improve the quality and expand the product range, the matrix is made in the form two semi-matrices, one of which is fixed in the top plate and spring-loaded, and the second is mounted in a container with the possibility of vertical movement from BepxiHeu by means of an intermediate mechanism. 2. A stamp according to claim 1, characterized in that the intermediate mechanism is made up of at least two vertically positioned wedges mounted on the top plate, each of which is mounted with the possibility of interaction with a corresponding horizontal spring-loaded wedge mounted on the bottom plate and acting on wedge under the corresponding matrix. 3. A stamp according to claim 1, characterized in that the intermediate mechanism is made in the form of two pairs of communicating cylinders interconnected, mounted under the bottom plate, the pistons of one of which are rigidly connected to the upper plate, and the pistons of the other act on the corresponding semi-matrix. 4. A stamp according to claim 1, characterized in that the intermediate mechanism is made in the form of a lever mounted on an axis fixed to the bottom plate with the possibility of rocking motion in a vertical plane, at the end of which the rod is pivotally fixed, associated with the upper plate, while the lever in the middle part has a protrusion acting on the corresponding semi-matrix. Sources of information taken into account in the examination: 1. Copyright certificate N ° 311693, M. Cl.2. On 21J 5/08, 1970 (equivalent). 2. USSR author's certificate No. 258833, M.Kl.2. In 2IJ 13/02, 1968 (prototype). 2  /; Z2 29 28 27 .3