RU205070U1 - Stamp for making flat rings by compression - Google Patents

Abstract

The utility model relates to the processing of metals by pressure and can be used in the manufacture of flat rings from an oval blank. The stamp contains punches designed to deform an oval blank by compression in a horizontal plane on both sides. The deformable workpiece during the entire deformation time is located between the interconnected base plate and the clamping cover, which will prevent the loss of its stability. The punches have the ability to move in the grooves of the base plate. As a result, it is possible to obtain flat annular parts with a high specified geometric accuracy and quality while ensuring the required productivity and reducing metal consumption. In addition, there is no limitation on the maximum diameter of the produced rings due to the horizontal arrangement of the workpiece in the stamp and the absence of restrictions on the closed height of the press. 2 ill.

Description

Technology area

The utility model relates to the processing of metals by pressure, namely to devices for the manufacture of flat rings, and can be used as a device for the manufacture of ring-type parts from oval blanks in all industries.

State of the art

A useful model is known from the prior art for the manufacture of flat rings from a pre-made oval blank with an oval hole according to USSR patent No. 1687343 (IPC B21D 53/16: publ. 10.30.1989, application No. 4686761 dated 05.05.1989).

The workpiece obtained after bending is laid in a stamp and installed in such a way that it is located on a cylindrical rod with its fixing elements, while one of the curved sides rests against the lower firing pin, and the upper firing pin presses on the other side during the slide downward, resulting in alignment curved sides. To facilitate the alignment of the curved sides, they first work with conical strikers with different angles of the cone, and then with flat strikers.

The disadvantages of this device are the low geometric accuracy of products, the complexity of implementation and the possibility of loss of stability of the workpiece.

Known device for the manufacture of flat rings from a pre-made oval blank with an oval hole by stretching according to the RF patent for utility model No. 111785 (IPC B21D 11/00: publ. 27.12.2011).

The design of the device consists of a clamp, stretching slides, adjustable stops and a plate. In the upper position of the press slider, the clamp fixed to the shank (or top plate), in turn connected to the press slide, is in the upper position. Stretch crawlers are centered. In the lower position of the press slider, the clamp rests on adjustable stops. Between the clamp and the plate there is a gap equal to the thickness of the stretched workpiece with the possibility of its unhindered movement. Sliders are spread (from a wedge device, hydraulic cylinders, etc.) in opposite directions and stretch the workpiece.

The disadvantages of the device are the complexity of the design and the likelihood of loss of stability of the workpiece, as well as the limitation of the process by the presence of fracture from tension in the zone of the inner radius of the original workpiece.

Known device for the manufacture of flat rings from a previously made oval blank with an oval hole by stretching according to the RF patent for utility model No. 120023 (IPC B21D 11/00: publ. 09/10/2012).

The design of the device consists of a plate, stretching sliders, adjustable stops, a clamp and additional internal adjustable stops, made with the possibility of sinking them at the initial moment, when the oval hole in the oval blank is less than their diameter, and extending them with the help of springs when stretching the oval blank and increasing holes. In the upper position of the press slider, the clamp fixed to the shank (or top plate), in turn connected to the press slide, is in the upper position. Stretch crawlers are centered. In the lower position of the press slider, the clamp rests on adjustable stops. Between the clamp and the plate there is a gap equal to the thickness of the stretched oval blank with the possibility of its unimpeded movement. Crawlers move in opposite directions and stretch the oval workpiece.

The disadvantages of the device are also the complexity of the design and the high probability of loss of stability of the workpiece, as well as the limitation of the process by the presence of fracture from tension in the zone of the inner radius of the original workpiece.

The closest analogue is a device for the manufacture of flat rings from a previously made oval blank with an oval hole according to the RF patent for utility model No. 144991 (IPC B21D 11/00: publ. 09/10/2014).

The design of the device consists of side plates, a punch, a matrix, adjustable (replaceable) internal spring-loaded stops made with the possibility of sinking them when installing the workpiece into the matrix of the device. In the side plates and on top, vertical slots with a width less than or equal to the width of the original blank can be made for ease of installation between the plates. At the initial upper position of the press slider, the punch fixed on the slider is also in the upper position. At the initial moment of installation of the workpiece into the matrix, the internal spring-loaded stops are recessed, and then, under the action of the springs, they return to their original position, thereby holding the workpiece in order to avoid its displacement at the beginning of deformation. After placing the workpiece in the die, the press slider moves down, and the punch compresses the workpiece with a force P until the workpiece reaches the required ring shape. After the press slider reaches the lower position and the workpiece is compressed to the required ring shape, the slider moves to the initial upper position, and the resulting ring is removed from the device, for example, by a spring pusher. When the resulting ring is removed from the matrix, the internal spring-loaded stops are recessed again, and then, under the action of the springs, they return to their original position.

The disadvantages of this device include the complexity of the design, limitation of the maximum diameter of the rings produced due to the need for vertical positioning of the workpiece and restrictions on the closed height of the press, punch and die and the likelihood of loss of stability of the workpiece (transverse bending) and a decrease in the quality of the resulting part due to the free location of the workpiece in the initial moment of compression of the workpiece.

Disclosure of a utility model

The technical solution of the claimed utility model can be attributed to a die device for manufacturing ring-type parts from oval blanks by the compression method to ensure the required high quality of the obtained parts and the required productivity, as well as to reduce metal consumption compared to traditional methods of manufacturing ring parts, for example, punching.

The technical result of the proposed utility model is the ability to obtain flat annular parts with a high specified geometric accuracy and quality while ensuring the required productivity and reducing metal consumption. In addition, there is no limitation of the maximum diameter of the produced rings due to the horizontal arrangement of the workpiece in the stamp and the absence of restrictions on the closed height of the press.

The essence of the utility model lies in the fact that the device has the ability to carry out the process of compression of the original oval workpiece with an oval hole by force P from both sides with punches until the workpiece reaches the required ring shape, and the difference is that the workpiece is compressed in the horizontal plane, while the workpiece all the time of deformation is located between the base plate and the clamping cover, which prevents the loss of its stability and ensures the required quality of the resulting annular part.

List of figures

FIG. 1 - Stamp of the proposed design in the initial position.

FIG. 2 - Stamp of the proposed design in the end position.

Implementation of the utility model

The essence of the utility model is illustrated by drawings, Fig. 1 and FIG. 2 which shows the stamp of the proposed design in the initial and final position.

The stamp consists of a cylindrical shank 1, connected to the upper plate 2, on which the stops 3 are installed. The lower part consists of the lower plate 4, the support plate 5, movable stops 6, compression elements (punches) 7 and the pressure cover 8. The pressure cover 8 is connected with support plate 5 with four bolts. The punches 7 can move in the grooves of the support plate 5, pressed by the pressure cover 8.

According to the proposed utility model, a stamp for the manufacture of flat rings by compression works as follows.

The original oval blank is installed in the cavity of the support plate 5 using two guides (not shown in Fig. 1). The upper part of the stamp is attached to the press slider using a cylindrical shank 1, after which the deformation force directed vertically downward through the stops 3 is transmitted to the movable stops 6 and then to the punches 7, which begin to compress the workpiece in a horizontal position. During compression, the flatness of the workpiece is ensured by a constant gap between the support plate 5 and the clamping cover 8. Deformation (compression) of the workpiece is carried out until the required diameter of the annular part is obtained. At the same time, to change the size of the produced rings, in particular, its outer diameter, it is enough to replace the punches 7.

After reaching the position of compression of the workpiece to the required ring shape, the movable stops, and, consequently, the punches are moved by the springs (not shown in Figs. 1 and 2) to the initial position, and the resulting ring is removed from the device, for example, by a spring pusher (in Fig. 1 and 2 not shown).

Compared to the manufacture of annular parts by cutting from a sheet, the use of a stamp of the proposed design for obtaining annular parts provides a decrease in metal consumption by more than 1.5 times while ensuring the required quality of the rings.

The design of the device allows it to be installed on a conventional hydraulic or crank press equipped with automatic or manual loading of blanks and removal of finished parts to ensure the required productivity.

Claims (1)

A stamp for the manufacture of flat rings by compression from an oval workpiece, characterized in that it contains punches made with the possibility of deformation of the workpiece by compressing it in a horizontal plane by force P from both sides and interconnected by a base plate made with the ability to move punches in it, and a pressure the cover, while the base plate and the clamping cover are made with the possibility of finding a deformable workpiece between them during the entire time of deformation with the provision of preventing the loss of its stability.

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