SU1031573A1 - Deep drawing apparatus - Google Patents

Abstract

A DEVICE FOR A DEEP EXTRACT with an end support for a workpiece flush, containing a matrix, a punch, a central clamp and a peripheral clamp in the form of a cup, and an elastic ring, which are concentrically arranged relative to it. that, in order to provide the possibility of drawing out hard-deformed alloys, the central clamp is made in the form of a ring installed in the cavity of the peripheral clamp with the possibility of relative axial movement and formation of a cavity between the bottom part of the peripheral clamp and the non-working end of the central clamp, the peripheral clamp is made with an annular cavity, pressure-filled fluid filled with a cavity between the central and peripheral clamps, and an elastic ring e end of the latter. (L to ate v | from the Fa.}

Description

The invention relates to the processing of metals by pressure, in particular to devices for the deep drawing of articles from sheet metal; and can be used in mechanical engineering industries, where it is required to manufacture hollow parts with a large relative depth.

The closest to the proposed technical essence and the achieved effect is a device for deep Q drawing with end support of the workpiece flange, containing a matrix, a punch, centrally clamped relative to it and peripheral pagasim in the form of a glass, as well as an elastic ring 1 .

However, the process of scrubbing hard-to-mold materials with the help & the known device is difficult due to the insufficient size of the varnish-like pore from the side of the elastic ring. In addition, in the process of the folding-convolution, a thickening of the billet of the preform occurs, which also prevents the formation of truss-deformable materials, 25, The purpose of the invention is to ensure the possibility of drawing out of the hard-deforming alloys.

In order to achieve this, a device for deep-drawing from the brake. holding the flange of the workpiece, we contain a matrix, a punch, concentric concentric with respect to it the central pattern and the peripheral clamp in the form of -hakan, as well as an elastic ring, the central clamp is made in the form35

The ring installed in the peripheral pressure cavity with the possibility of axial axial displacement and formation of a cavity between the bottom part of the peripheral pressure and the inoperative end of the central pressure, the peripheral pin is made with an annular cavity filled with food under adjustable pressure and communicated with the cavity between the central and peripheral clamps, and the elastic ring is installed under the end of the latter.

FIG. Figure 1 shows a device, a longitudinal section (to the left of the axis of symmetry, the initial position is shown, right 50 — the position of the device at the moment when the punch is lowered to the lekotory height); in fig. 2 — node I in FIG. one; on. FIG. 3 shows the node W in FIG. one; in fig. 4, a longitudinal section (on the left 55 of the symmetry axis, the position of the device is shown when the peripheral shoulder is trimmed and the elastic ring is pre-compressed, the right-hand current is obtained when the central and peripheral clamps are lowered temporarily)

The device comprises a punch 1, a die 2, a peripheral clamp 3 in the form of a cup and a central clamp which are concentrically located relative to the punch. 4, made in the form of a ring installed in the cavity of the peripheral clamp with the possibility of relative axial movement and formation of the cavity 5 between the bottom part of the peripheral clamp and the non-working end of the central clamp, elastic ring 6 installed under the end of the peripheral clamp, having a thickness exceeding the original thickness of the stamped workpiece S,. Peripheral priming; 3 at the non-working end is complete with an annular cavity 7 filled with fluid under adjustable pressure, communicated by means of a safety and unloading valve 8 with a cavity 5 and containing a floating piston 9, while the annular cavity 7 is connected to the cavity 5 by means of a check valve 10 At the non-working end of the central clamp, the outer jaf is annular groove with a depth of E, and an 11 which mates with the working face in the central part along the radius R exceeding the exhaust radius of the matrix 2g by the gap between .. Of cylindrical surfaces of the die and punch, ie, on the wall thickness of the finished product, whereby in the central part of the image - ethz protrusion 12 whose apex has a radius j. equal to 0.1-0.3 mm (for durability). A protrusion 13, formed in the peripheral part of the central clamp 4, mates with the groove bottom 11 along a conical surface with an angle about 1 0-15 °. The mating of the protrusion 13 with the side surface of the central clamp 4 is made along radius R.

. The elastic ring is made with a TOJ-one that exceeds the thickness of the blank to be stamped (in order to compensate for the volumetric compression of the elastic material) and is equal to 1.5-2.0 ,, 5,

It works as follows.

A preform 14 of thickness S (j and lugW diameter elastic ring) is mounted on the die 2, mounted on a double-acting press table (not shown), with the action of an external slide slider (not shown), the peripheral mode 3 sec. with the elastic ring 6, the second with the workpiece 14, while the punch 1 is also lowered under the action of an internal slide (not shown) before contacting the workpiece. After increasing the pressure of excess RIZ5 in the annular cavity 7, under the action of which the piston 9 o blows down the working fluid from the annular cavity 7 through the check valve 10 flows into the cavity 5, with the result that the central clamp 4 presses the flange of the workpiece 14 with a force preventing corrugation. The projections 12 and 13, affecting the material of the workpiece 14, prevent squeezing lubricants from the cavity formed by the bottom 11 of the central pressure of the clamp 4 and the workpiece 14. Then load the punch 1 force RP OfSPpasp I where Ppoiap - force that destroys the material of the workpiece when pulling Punch 1 lowers the height g f, + g SQ- De g - the radius of the edge slave bringing the end face of the punch 1; The radius of the extruded edge of the matrix 2, and stops, since the specified force is not sufficient to further the process. When lowering the outer slide of the press (not shown), the peripheral clamp 3 with its working end compresses the elastic ring 6, thereby compensating for the volumetric compression of the elastic material with the creation of an initial back-pressure on its side. The fluid in the cavity 5 is compressed to a pressure exceeding the pressure .to which the safety-unloading valve 8 is calculated, and after opening the latter is displaced from the cavity 5 into the annular strip 1 3 With a further increase in Pp, the peripheral pressure 3 and the central pressure 4, work as one integer, they are lowered simultaneously: the central clamp 4 will set the zagauchevka 14 from the initial thickness Sg to thickness 5 equal to the thickness of the finished part, and the peripheral clamp 3 will reduce the thickness of the elastic ring 6 to cG 5p-S, as a result of which the elastic material will have to flow into the gap between the matrix 2 and the working end of the central clamp 4, is constantly in contact with the end of the ntampue workpiece and thus creating a self-supporting backwater. The material of the flange part of the workpiece 14, which is under the joint influence of the upsetting force from the central drive unit 4 and the end support from the side of the elastic ring 6, comes into a plastic state and is squeezed into the gap between the die 2 and the protrusion 12, creating a corrected outflow the material into the gap between the die 2 and the punch 1. When a sufficient depth of drawing is reached, the punching cycle ends. The device is reset to its initial position when its parts are in reverse order, the finished product is removed from the device. The proposed device makes it possible to manufacture hollow articles, the depth of which is 5-1 O times the depth of the parts obtained by the limestone device, by increasing the {) percent of the stretching factor and thinning the material during the draft. The economic effect from the introduction of one device at one enterprise will be 5.0 thousand rubles. in year.

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FIG. 2

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Yes

Claims (1)

DEVICE FOR DEEP EXTRACTION with an end support of the workpiece flange, comprising a matrix, a punch, a central clip concentrically arranged relative to it and a peripheral clip in the form of a glass, as well as an elastic ring, distinguished by that. that, in order to provide 'the possibility of drawing out of hardly deformed alloys, the central clamp is made in the form of a ring mounted in the cavity of the peripheral clamp with the possibility of relative axial movement and the formation of a cavity between the bottom of the peripheral clamp and the inoperative end of the central clamp, the peripheral clamp is made with an annular cavity, filled with fluid under controlled pressure and communicated with a cavity between the central and peripheral clamps, and an elastic one. the ring is installed under the butt the last one. th SS £