SU1315078A1 - Arrangement for obtaining thickening on the edge of sheet material - Google Patents

Abstract

The invention relates to the processing of metals by pressure, more precisely to sheet stamping, and can be used in aircraft manufacturing, shipbuilding and other areas of mechanical engineering. The purpose of the invention is to improve the quality of the resulting thickening due to the prevention of corrugation in the area of the material set. The device contains installed against each other support plate (OP) 1 and pressure plate 2, the pusher 4 and the backpressure element 5 (EP) in contact with the working surface of the pusher (T) 4 and installed in the cavity of the pressure plate 2 with the ability to move along the working lugs 6 The sheet 7 is placed between the OP 1 and the pressure plate 2 against the stop in T 4. Under the action of a force T 4, EP 5 moves and at the same time a part of the blank is deposited between OP 1 and EP 5. In the process of draft 5, EP 5 moves like this image That, at any moment in time, the area of thickening is supported by the movement of its curved surfaces a and o along the working lugs b, which prevents the loss of stability. 2 ml. i (L S. (

Description

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The invention relates to the processing of metals by pressure, namely, sheet metal forming, and can be used to produce nodules on the edges of sheet metal parts.

The purpose of the invention is to improve the quality of thickening by preventing the formation of corrugated

FIG. 1 shows a device for producing a bulge on the edge of a sheet material in its initial position in FIG. 2 - the same after receiving the set amount.

The device comprises a support plate 1 and a pressure plate 2 with a cavity 3, a pusher 4 and a backpressure element 5. in contact with the working surface of the pusher A and installed in the cavity 3 of the pressure plate 2 with the ability to move along the working lugs 6 made in the cavity of the pressure plate 2 and located with a shift in height against each other. The protrusions 6 are in contact with opposing surfaces a and 5 of the elements 5 of the counterpressure. The shape of the working protrusions has a cross-sectional view with a rounding at the top. The surface and shape form 5 of the backpressure element 5 has a single curvature and is described by the expression

V - O 0 s

Y - .-- ™ - S,,. .

where Y, X are the coordinates of the points on the surface of the element opposite to pressure.

For the surface and the coordinate is calculated from the point AJ, i.e. areas of contact of the surface q with the internal working protrusion. For surface B, the coordinates are read from point B, i.e. contact area of the surface S with the outer working ledge. The counting direction is shown in FIG. one.

The outgoing gap S between the base plate 1 and the counterpressure element 5 is selected depending on the required amount of thickening and the initial thickness of the sheet material. The initial offset ND of the backpressure element 5 is selected depending on the required height of the thickening. The pressure plates 2 are made of different heights.

The magnitude of the displacement of the working protrusions 6 relative to each other should

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be such that the working spade on the higher plate is always higher than the overhang on the lower plate to ensure operability

backpressure element 5 5

The device works as follows.

Sheet 7 is mounted on the support plate 1, inserted from the bottom

in the cavity between the pressure plate 2 and the base plate 1 until it stops in the pusher 4. Thereafter, the pressure plate. 2 is pressed, for example, with the help of a hydraulic cylinder (not shown) sheet

the workpiece to the base plate 1, while the counterpressure element 5 contacts the working part of the pusher 4, the surface of the sheet blank and the working protrusions 6. Under the force exerted on the follower, for example, from a press beam (not shown), the latter displaces the counterpressure element 5 and simultaneously upsets the part of the sheet blank between the base plate 1 and the backpressure element 5. During the draft of the sheet stock, the backpressure element 5 is moved in such a way that at any subsequent time

the thickening zone is supported all the time by moving the curved surfaces a and S of the counterpressure element along the working protrusions 6 and thereby preventing the

the loss of stability of the sheet stock, i.e. prevents corrugation. When the required amount of thickening of the sheet material edge is reached, which is determined by the vertical movement of the pusher, the process is stopped, the pusher is lifted, the pressure plate is retracted from the base plate, freeing the sheet, and the latter is removed from the device.

The proposed device provides a thickening on the edge of the sheet material without corrugation with the sizes of the thickening S / S,

.2pr / 8o, where - thickness of the bulge, h - height of the bulge; SP - initial sheet thickness.

Example. The device was tested when receiving a thickening on the edge

sheet material 120x100 mm with a thickness of 2 mm made of aluminum alloy M1g6. The original gap S 2 mm, departure Hp 30 mm. Clip plate osuschest313

using a hydraulic cylinder, the deformation is carried out on an Olsen hydraulic testing machine. As a result, a thickening on the edge along the entire length of the sheet stock 100 mm is obtained. Height of thickening h 15 mm, thickness S 4 mm. The thickening turned out to be equally thick along the entire length without traces: corrugation.

The proposed device will improve the quality of the thickening due to the prevention of corrugation in the area of the material set.

Formula I.3 gain

A device for producing a thickening on the edge of the sheet material, which is located opposite one another with a gap, forming a cavity for placing the workpiece, a support plate and a pressure plate with a cavity, a pusher and a counterpressure element mounted in the cavity of the pressure plate with the possibility of moving and contacting with the working surface of the pusher , different

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In order to increase the quality of the thickening by preventing corrugation, one of the pressure plates, located on the side of the support plate, is made smaller in height, and on the surfaces of the pressure plate facing one another are protruding contact with

opposite lying surfaces. the pressure element in the sections, wherein the surface of the section represents a single curvature surface described by the equation

Y

about HO N „- X

where Y, X are the coordinates of the points of the surface of the backpressure element from the zone of contact of the latter with the working lugs;

SQ is the initial gap between the base plate and the backpressure element; HQ - the initial output of the backpressure element.

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Editor A. Sabo

Compiled by N, Chernilevska

Tehred M. Khodanich Corrector, Shekmar

Order 2236/6 Circulation 732 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

Claims (1)

The claims 15 A device for obtaining a thickening on the edge of the sheet material, containing one opposite the other with a gap forming a cavity 20 for accommodating the workpiece, a base plate and a pressure plate with a cavity, a pusher and a back pressure element mounted in the cavity of the pressure plate with the possibility of movement and 25 contact with the working surface of the pusher, characterized in that, in order to improve the quality of thickening by preventing corrugation, one of the pressure plates located on the side of the base plate, Nena lesser height and facing one another the surfaces of the pressure plate are made lobes disposed offset and to come into contact with the oppositely lying surfaces. · Pressure element in areas where the surface area is the surface of single-curvature described by the equation where. Y, x are the coordinates of the points of the surface of the backpressure element from the contact zone. last with working ledges ;. S _o - the initial clearance between the base plate and the back pressure element; H _about - the initial protrusion element backpressure.