RU2799196C1 - Bending punch - Google Patents

Abstract

FIELD: metal forming.

SUBSTANCE: invention can be used for bending pipes, profiles or strips. The bending punch has a prefabricated structure and consists of plates such as a stop (1), an extension (2) and a flange (3), which have a round hole for fitting the bending punch onto the bending device shaft. The plates are interconnected by means of at least one threaded connection (4). Stops (1) are located with the possibility of placing a bent workpiece between them. The extensions (2) are located between the flange (3), which forms a stiffening rib on the workpiece, and stops (1).

EFFECT: reliability of the device is increased, its technological capabilities are expanded, and the quality of the products obtained is improved.

2 cl, 4 dwg, 2 ex

Description

FIELD OF TECHNOLOGY

The device belongs to the field of metal forming, in particular to a punch for bending shaped pipes, it is used in various industries, housing and communal services or in everyday life. The device can be used for the manufacture of curved pipes, profiles, metal strips with a certain bending radius. The device can be used for the manufacture of furniture, greenhouses, sheds for the house, gazebos, swings, barbecues, decorative fences and gates.

BACKGROUND OF THE INVENTION

The prior art patent RU No. 2148456 C1, B21D 7/02, publ. 05/10/2000, according to which the device for bending profiles of asymmetric section contains a rotating table, a bending punch located on it, a clamping device and a rotary die with a point for a profile. In this device, the bending punch has a semicircular shape with stops along the edges.

Known manual hydraulic pipe bender, which is published on the site

https://kirov.vseinstrumenti.ru/stanki/gibochnye/trubogibochnye/trubogiby-dlya-kruglyh-trub/gidravlicheskie/voll/ruchoj-gidravlicheskij-trubogib-voll-v-bend-1-3-11000/ (date of access to site 11/08/2022), containing several interchangeable bending punches of a semicircular shape with ledges along the edges.

A manual pipe bender is known, which is published on the site https://xn--80abb6bfxm.xn--plai/product/trubogib-ruchnoy-tigson-tu-22 (date of access to the site 11/08/2022), which contains a one-piece semicircular bending punch with ledges along the edges and two ledges in the inner part of the working area of the punch.

The disadvantages of the aforementioned punches for pipe benders is the one-piece design of the punches, the need to replace the punch when bending different radii.

Known manual pipe bender, which is taken as the closest analogue, published on the website

https://www.ozon.ru/product/uglogib-dlya-trubogib-dlya-trubogiba-dino-676349052/

(date of accessing the site 11/14/2022), which contains a prefabricated structure consisting of two plates of the original shape, rounded plates, a central plate with two protrusions that have a round hole, interconnected by threaded connections.

The disadvantage of the closest analogue is the design, which assumes that the profile is inserted at one end between the threaded connections that connect the protruding parts of the side plates, when bending, which limits the use of profiles in height and wears out the threaded connections, because. the workpiece touches them during operation, and the design of the punch does not allow obtaining a symmetrical radius of the inner corner of the workpiece, because one end is held in the punch, and the other is stretched, as it were, on rounded plates, which ultimately leads to a decrease in the quality of the finished product and worsens its appearance, the absence of a flange in the kit leads to unpredictable deformation of the metal.

The disadvantages of analogues eliminates the proposed technical solution.

DISCLOSURE OF THE INVENTION

The technical task is to create a bending punch, which has a prefabricated structure and allows bending pipes of different sizes, adjusting the design of the punch to the device and the corresponding workpiece for bending, while obtaining high quality products.

The technical result to which the claimed solution is directed is to increase the reliability of the device, expand the technological capabilities of its application, improve the quality and strength of the resulting products.

The technical result is achieved by the fact that the bending punch has a simple and reliable prefabricated structure, having components such as stops, extensions and flanges, consisting of plates fixed to each other by threaded connections, having a round hole for landing on the shaft.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 - Bending punch isometric.

Fig. 2 - Bending punch front view, top view, side view.

Fig. 3 - An example of the construction of a prefabricated punch with a flange in disassembled form is shown.

Fig. 4 - Examples of the design of prefabricated punches, bottom view.

In FIG. 1-4 the following positions are indicated:

1 - emphasis;

2 - addition;

3 - flange;

4 - threaded connection.

IMPLEMENTATION OF THE INVENTION

Further, all components of the present invention are described in detail with reference to the drawings and the reference positions indicated on them for a more complete understanding of the scope and all technical aspects of the claimed technical solution by a person skilled in the art.

In FIG. 1-4 show the claimed bending punch.

The bending punch has a prefabricated structure and consists of plates, such as stop 1, extension 2 and flange 3, which have a round hole for fitting the bending punch onto the shaft of the bending device. The plates are interconnected by at least one threaded connection 4, it can be a screw, a bolt with a nut, a stud with nuts. In FIG. 1-3 shows the connection of plates with three screws. The shape of the stops 1 can be semicircular, rectangular, angular. The bending punch has a symmetrical design, which, when bending, has the advantage that the bending punch presses on the workpiece according to the principle of stamping with axial load, which gives a more uniform distribution of the load on the workpiece, thereby making it possible to obtain a product with a smooth, smooth internal angle. The internal bending angle of the workpiece can reach 80°. The flange 3 in the design of the bending punch has a radius greater than the radius of the extensions 2. The end of the flange 3 has a semicircular shape, this allows the metal to receive the direction of movement during bending and relieve the stress of the metal, which eliminates unwanted deformations during bending, also forms a stiffening rib, which increases strength of the curved part. All this allows to improve the quality and improve the appearance of manufactured parts. The radius of the prefabricated plates of the punch - dobor 2 and flange 3, can be different to obtain a different radius of the inner corner of the workpiece.

The prefabricated design of the bending punch and extensions of 2 different widths allow the punch to be assembled according to the user's requirements, adjusting it to the size of the profile. Allows you to bend both one profile at the same time, and several profiles, while changing the design of the bending punch, for this it is necessary to assemble the bending punch in such a way that there are stops 1 along the edges of the profile, in the center of the flange 3, and between them there are extensions 2 in the required amount and of the desired width so that the profile passes freely between the stops 1, but does not dangle between them.

A round hole in the plates of the bending punch allows it to be mounted on the bender shaft. The bending punch has a simple and reliable design, which makes it possible to obtain high-quality products and makes it possible to use it in bending devices of various configurations, which expands the technological capabilities of the claimed device.

The operation of the device is as follows.

Example 1

In FIG. 3 shows an example of assembling a bending punch for bending a profile with a width of 40 mm. To do this, it is necessary to assemble the bending punch using semicircular plates, such as stops 1, extensions 2, flange 3 and threaded connections. In this case, the bending punch has a complete set: two stops 1, which are located on the sides, one flange 3 5 mm wide in the middle of the bending punch, and five extensions 2, of which two are 8 mm wide, two are 10 mm wide and one is 0.8 mm wide it is used only if the profile gauge 40 mm does not fit in width, which are interconnected by three screws.

After assembling the bending punch for a certain width of the profile, it is installed on the shaft of the bending device and used for its intended purpose.

Example 2

In order to simultaneously bend two profiles with a width of 20 mm, a bending punch can be assembled using semicircular plates, such as stops 1, extensions 2, flange 3 and threaded connections. In this case, the bending punch has a complete set: three stops 1, two flanges 3 5 mm wide, four extensions 2 8 mm wide, which are interconnected by three screws. The punch assembly sequence will be as follows: stop 1, add 2, flange 3, add 2, stop 1, add 2, flange 3, add 3, stop 1.

After assembling the bending punch for a certain width of the profile, it is installed on the shaft of the bending device and used for its intended purpose.

Claims (2)

1. A bending punch, characterized in that it is made of at least two stops, extensions and at least one flange, made in the form of plates having a round hole for fitting the punch on the shaft and connected to each other by means of at least one threaded connection , the stops are located with the possibility of placing a bent workpiece between them, and the extensions are located between the flange, made with the possibility of forming a stiffening rib on the workpiece, and the stops, while the flange and extensions are made along the radius. 2. Bending punch according to claim 1, characterized in that the plates are made of structural or tool materials.

Images