SU1440581A1 - Arrangement for forming thickenings on bands - Google Patents

Abstract

The invention relates to the processing of metals by pressure and can be used in aircraft manufacturing, the shipbuilding industry and other areas of mechanical engineering. The purpose of the invention is to expand the technological possibilities of shaping by increasing the size and optimal shape of the bulge, increasing the productivity by simultaneously producing bulges on both side edges of the tape. The device contains a clamping device consisting of a support 1 and a clamping 2 plates. The pressing plate on the side of the support plate is formed with a cavity 3, which is bounded by rectangular sections 4, which become inclined, with the latter forming a die of variable cross section. In the base plate 1, heating elements 8, for example, heating elements are installed at the location of the spinneret, and in the zone adjacent to the spinnerets from the internal cavity of the pressure plate 2, cooling elements 9, the shape, dimensions of the cavity and the spinnerets are interconnected, formula. Sheet 10 is fed into the cavity 3 of the pressure plate 2, heated and precipitated as it is pushed, forming a thickening e. 4 sludge. (L

Description

0g / e /

The invention relates to the processing of metals by pressure, namely to sheet metal stamping, and can be used to produce thickening on tapes.

The aim of the invention is to simplify the design of the device, expanding the technological possibilities of shaping by increasing the size and optimum shape of the bulge, increasing productivity by simultaneously producing bulges on both lateral edges of the tape.

FIG. 1 shows the device in the 5 initial position, general view; in fig. 2 - device in the process of precipitation, general view; in fig. 3 shows section A-A in FIG. one; in fig; 4 - graphic dependences of effort Р on angle f, 20

The device comprises a clamping device consisting of a support 1 and a pressure plate 2. The clamping plate 2 from the side of the base plate is made with

The straight portions 4 in the cavity of the pressure plate are set with the blank 10, the tape, which has side surfaces, i.e. edges that thicken, contact with these surfaces. The heating elements 8 are heated to a predetermined temperature, the billet is passed through the cooler, for example, flowing water. After that, a push force is applied to the tape, for example by using hydraulic cylinders and grippers (not shown), while the side edges are left and right , moving into the slope of the zone, they begin to precipitate with the sections of the spinneret 5, and the precipitated material enters the sections of the spinneret 7, where it fills them strictly to the depth S. After passing through the entire portion of the deposit, the edges of the edge are shaped and take on the spin code form n the last. After leaving the end of the tape with thickened edges of the clamping

cavity 3, which is limited to the straight-25 fixture, it is gripped and

linear sections 4, passing into inclined 5 and 6, forming together with the cavity a die of variable section 7. In addition, in the base plate 1, heating elements 8, for example heating elements, are installed at the location of the DOR 7, and in the area adjacent to the dies The sides of the inner cavity of the pressure plate — the cooling elements 9; The shape, dimensions of the cavity, and the spinnerettes are interconnected by dependence, defined by the formula:

0 () -arctg ctg,

extends forward, for example, from a hydraulic cylinder drive associated with a pushing actuator (not shown). After that, the tape is pulled through the die plate until a thickening is obtained at a predetermined length of the tape edge. The presence of heaters and coolers provides a temperature drop in the zone of force transfer and in the deformation zone, which both bakes filling with the filter material and prevents losses of the sheet stability.

When calculating the formula of communication, the size of the cavity and the die will use the following condition for the constancy of the volume of the material before and after deformation to be the initial prerequisites (the labels are identical to the device element labels)

where o (

angle of metvdu to the inclined side surfaces of the die; LL - the angle between the surfaces

linear and oblique

sections of the cavity presser

plates, f 15-20 °;

cavity depth in the middle

parts;

depth of the die;

45

In calculating the formula for the relationship of the dimensions of the cavity and the die, the following prerequisites should be used as the initial prerequisites: the condition of constant volume of the material before and after deformation (the designations are identical to the designations of the device elements)

5 „-8„ h-S

(one)

S is the depth of the spinnere; the angle of inclination of the surface of the spinneret gi

h - minimum height of the die; jg should lie within {15-20 °, ho - the maximum height of the die. which is experimentally confirmed (figure 4). The dependence of the force P on the magnitude of the angle ij at various values of the coefficient of friction and is shown in FIG. 3. At an angle less than 15, the device operates as follows.

The clamping device is preassembled, while the pressing plate 2 is fixed on the support 1 by the force of the press crosshead, by tightening the bolts, etc. After that from

the area of contact of the workpiece with the tool increases, as a result of which the friction increases and the force of deformation increases significantly. With

The straight portions 4 in the cavity 3 of the pressure plate are set to a sheet blank 10, a belt which has lateral surfaces, i.e. edges that thicken are in contact with these surfaces. The heating elements 8 heat the billet to a predetermined temperature, and flow water, for example, is passed through the coolers. After that, a pushing force is applied to the tape, for example by means of hydraulic cylinders and grippers (not shown), while the side edges of the tape to the left and right, moving to the zone of inclined sections, begin to precipitate with sections of the spinneret 5, and the deposited material enters the sections dies 7, where it fills them strictly in depth S. When the entire precipitate section has passed, the edges of the mold are shaped and take on the shape of the dies in the shape of the latter. After leaving the end of the tape with thickened edges of the clamping

extends forward, for example, from a hydraulic cylinder drive associated with a pushing actuator (not shown). After that, the tape is pulled through the die plate until a thickening is obtained at a given length of the edge of the tape. The presence of heaters and coolers provides a temperature drop in the zone of force transfer and in the deformation zone, which provides filling of the die material and prevents loss of stability of the sheet.

In calculating the formula for the relationship of the dimensions of the cavity and the die, the following prerequisites should be used as the initial prerequisites: the condition of constant volume of the material before and after deformation (the designations are identical to the designations of the device elements)

8 „h-S

(one)

the area of contact of the workpiece with the tool increases, as a result of which the friction increases and the force of deformation increases significantly. With

coal m greater than 20 ° also occurs a significant increase in the deforming force. Only in the V interval (15–20 ° the minimum friction is ensured, which gives the minimum value of the deforming force. Using the notation in FIG. 1, we obtain

about.

+ / p) 90 °

from where

0 ((90 ° -) - | b

Wherein

tgf

ho - h

  h-:

Exclude 1

tgyi

From (4) in view of (1) we have

P- P TT-s- So

 ctgyj, (5)

i

i.e. the angle of the spinneret o (-raven

0 ((90 - | y) - arctg

feo) §o

 ii s

 Ctgy

(6).

For example, at 20 °, h. 20 MM; h 40 MM; Sg 2 MM; S 4 mm angle

35

A device for the formation of nipples on the tapes, containing a clamping device in the form of support and pressure plates, a variable cross section die, heating and cooling elements, characterized in that, in order to simplify the design, spread out technological possibilities and vary the cross section filler size formed by an internal cavity that was made into a pressure plate on the side of the base plate, the lateral surfaces of which are bounded by rectilinear cone “iL 16,

The device, made according to figs 1-3, was tested in obtaining thickened on a ribbon 500 mm long, 150 mm wide, 2 mm thick, from aluminum, passing into the inclined section of the AMgb alloy, heating the deformation zone, at the same time heating elements

located in the base plate in the area of the sloped sections, and the cooling elements - between them, were applied to the test table of the machine. 45 The shape and size of the Olsen cavity and spinneretter, its traverse, were fixed by the dependence

Hc d) So. The ctgjping was carried out up to 400-420 With heating elements, cooling through a hole in

stove running water, Device (90-y) - arctg h-S

pressure plate. The end of the tape was preliminarily cut by the width of the spinnerets, the tape was placed into the cavity with a narrow end, and then to a narrow g where (Y is the angle between the inclined side surfaces of the die) —the angle between curvature at the end was applied pulling force from the hydraulic cylinder. tapes with thicker side edges, obtained in one pass. Dimensions of thickening: 2-4.6 mm; h 22-24 mm; B / 5c 2.1-2.3, h / So 11-12; ho 40-44 mm; / 20 °; 0 16-17 °, where S is the thickness of the thickening.So is the initial thickness of the sheet.

moline and oblique portions of the cavity, 15-20;

SQ - cavity depth in the middle part;

S is the depth of the die;

h is the mic height of the die;

ho- maximum height of the die.

about

ten

15

20

25

thirty

35

ho is the initial height of the edge to be settled, h is the height of the thickening.

Claims (1)

With appropriate refinement of the device, determining the optimal angles o (depending on the initial and required thickening parameters, it is possible to obtain significantly larger thickening on the edges of the tapes of practically unlimited length. Obtaining thickening on both edges increases productivity by at least two times). It allows the sheets to significantly simplify the design due to the rejection of a complex roller die, a deforming roller and a heating system In general, increase the capabilities of the process by 1.2-1.4 times due to an increase in the size of the thickenings and productivity up to 2 times due to the simultaneous set of thickenings on two edges of the tape. A device for the formation of nipples on the tapes, containing a clamping device in the form of support and pressure plates, a variable cross section die, heating and cooling elements, characterized in that, in order to simplify the design, spread out technological possibilities and vary the cross section filler size formed in the inner pressure plate that was made from the side of the support plate of the inner cavity, the lateral surfaces of which are bounded by straight sections to the sloping sections, At this heating elements placed in the base plate in the placement of the inclined sections of the hanging elements - between no Shape and dimensions of the cavity and connected with Hs h 0 / (90th) - arctg h-S de (y - the angle between the inclined surfaces of the fil - the angle between the surface moline and oblique portions of the cavity, 15-20; cavity depth in the middle; depth of the die; mic is the height of the die; maximum height of the die. X -. / FI.5 Phie.g that iOOO 800 600 400