SU1397143A1 - Die for radial extrusion of geared parts - Google Patents

Description

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The invention relates to the processing of metals by pressure, namely to dies or accessories for them, and can be used for the manufacture of gear wheels, tool parts, and the like.

The aim of the invention is to increase the reliability of operation by improving the conditions of ejection of parts.

FIG. 1 shows a stamp, a general view of FIG. 2 is a device for holding and centering the workpiece; in fig. 3 is a view A of FIG. 2 in FIG. 4 — mechanism for moving additional punches; in fig. 5 is a kinematic diagram of a device for holding and centering a workpiece.

A stamp for radial extrusion of gear conical wheels comprises an upper movable plate 1, carrying the upper sleeve 2 with wedge lugs 3 and the main punch 4, the lower plate 5 with the lower holder 6 mounted on it, in which the forming matrix with the receiver 7 is placed, movably mounted in radial additional grooves 8 with external wedge bevels 9 and working tips 10, die holders 11, a mechanism for radial movement of additional punches and an ejector.

Additional punches are freely installed in the radial grooves — and on them internal wedge bevels 12 are made, and the mechanism of radial movement of additional punches is made in the form of a cup 13 from the outer to conical strip 14 at the end.

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The glass interacts with the internal wedge bevels of the Additional punches specified by the skid, and the lower end 15 with the pusher 16. In the bottom hole 17, the bottom of the glass is coaxially positioned with a gap relative to the bottom of the bore (in the closed position of the stamp), the ejector 18 installed in the matrix insert 19 .

Radial through grooves are made in the cup itself to accommodate a matrix holder installed in the bore of the lower casing and made in the form of a support cup with through radial grooves (similar to cup 13) .i

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In the drawing, in addition, the punch holder 20 is shown with an upper latch 21 and the lower lid 22.

A device for holding the workpiece on the stamp and centering it with respect to the axis of the stamp is installed on the upper plane of the bottom cover.

The device for holding and centering the workpiece on the stamp is made in the form of at least three supports 23 evenly and coaxially located about the 0-0 axis of the stamp, each of which carries a gripping element in the form of a hinged arm 24 mounted on one support the clamping jaw is made in the form of a roller 25, and the other shoulder is provided with a weight 26, and the weight of the weight is selected from the condition that prevents the lever from tipping over the weight of the workpiece.

The stamp works as follows.

When lowering the upper plate 1 (Fig. 1) Spring-loaded stops 3 act on the outer wedge bevels 9 additional punches 8, moving them in the radial grooves of the lower casing 6 to the workpiece 27 with pre-rolled teeth 28. When closed, additional punches 8 with their working tips 10 form a working gear cavity, while the number of tips and their shape correspond to the number and shape of the cavities of the teeth of the finished product. At the same time, the main punch 4 and the punch holder 20 are lowered, which begin to upset and squeeze the workpiece with their ends and simultaneous lowering of the cup 13 and the coaxially installed ejector 18. The movement of the latter is limited by the end of the die 19, and the cup 13 continues to sink to the bottom of the lower casing 6 As a result, a gap CG is formed between the end face of the ejector 18 and the bottom of the bore of the cup 13.

Upon further downward movement of the punch 4 and the punch holder, the pre-rolled teeth of the workpiece are filled in the radial direction of the cavity of the gear cavity formed by the closed additional punch 8. When this metal flow is axially limited by the ends of the ejector 18, the punch 4 and the punch holder. This is ensured30

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enters a uniform shaping of the toothed portion of the part in height with minimal contact of the heated metal with the tip 10. After the shaping process is completed, the plate 1 returns to its original position. In this case, first of all, the readjustment of the device is required in the case of using a workpiece of a different diameter from the finished part.

Claims (2)

Invention Formula 1, A stamp for radial extrusion of gears, comprising A punch A, since the part held by the upper clip with wedge lugs and blows by the friction forces in the toothed strip is the main punch, the bottom plate with additional closed punches placed by the lower cage, the matrix 8 due to the external bevels of the 9 spring-loaded wedge support and with a matrix with radial nasaNiH, in which dopolr 3 are installed. Upon further movement upwards 15 tender punches with skid plates 1 stops 3 rise 5 releasing additional punches 8, cup 13 under the action of pushers 16 early it moves upward and, with its conical rim 14, acts on the inner wedge bevels 12 additional punches 8, as a result of which the latter are moved apart, opening the gear cavity of the die. After the downturn of 25 cups 13 is up, the cf gap is selected, the glass bottom of the bore acts on the ejector 18, which pushes the finished part out of the die cavity 7. Next, the part is removed from the die 30 cavity by the robot’s hand (not shown), and the place is set to the next workpiece, and the work cycle is repeated. A device for holding and centering the workpiece operates as follows. When the robot handles the workpiece, which moves along the 0-0 axis of the stamp, the latter interacts with the rollers 25, with the result that the levers 24 are deflected downward, covering the workpiece along its outer surface under the action of weights 26. Since the moment of force from the weight P, the load is greater than the moment of lateral force force from the weight P of the workpiece; automatic centering and holding in vertical stripes is provided, as well as a mechanism for moving a full JIfxIX punches, a pusher and an ejector, characterized in that reliability of operation by improving the condi tions ejecting parts, additional punches with vsholneny. internal bevels from the bottom casing and are placed freely in the grooves of the matrix, and the mechanism of their movement is made in the form of a glass with a hollow central bore in the bottom of the cavity, radial through grooves and an external inclined section installed with the possibility of interaction of the said section with the internal bevels of additional punches, and the bottom end - with a pusher, while the ejector is placed in the bore with a gap relative to the bottom of the glass, and the matrix holder is installed in the radial grooves of the glass and placed retirement cage. 2. A stamp in accordance with claim 1, differing from 1040 and in that it is equipped with a device for holding and centering the workpiece in the form of at least three supports, evenly and coaxially located about the axis 45 stamps, each of which is equipped with a gripping element in the form of a double-arm lever hinged on it, on one shoulder of which a clamping sponge is mounted as a role35 billet stamping. In addition, 50 friend - cargo, upper ferrule with wedge lugs and main punch, lower plate with lower ferrule placed, die holder and die with radial nasaNiH, in which additional punches are fitted themselves, as well as a mechanism for displacing the additional jIfxIX punches, a pusher and an ejector, characterized in that, in order to increase the reliability of operation by improving the conditions of ejection of the part, the additional punches are completed c. internal bevels from the bottom cage and are placed freely in the matrix grooves, and the mechanism of their movement is made in the form of a glass with a hollow central bore in the bottom of the cavity, radial through grooves and an external inclined section installed with the possibility of interaction of the said section with the internal bevels of additional punches , and the bottom end - with a pusher, while the ejector is placed in the bore with a gap relative to the bottom of the glass, and the matrix holder is installed in the radial grooves of the glass and placed retirement cage. 2. A stamp according to claim 1, characterized in that it is provided with a device for holding and centering the workpiece in the form of at least three supports, evenly and coaxially located about the axis a stamp, each of which is provided with a gripping element in the form of a double-arm lever hinged on it, on one shoulder of which a clamping sponge is mounted in the form of a role W7 / Y77777777777 W 15 7 Fm.1 2G 25 Fa / 2.2 Bim 9sh -CD Yu Figm fug. five