RU201456U1 - Pipe bender - Google Patents

Abstract

The utility model relates to the field of metal forming, in particular to manual roll forming equipment. The pipe bender contains a frame with supports having bearings, in which support rolls are installed for rotation. Sprockets are attached to the backup rolls, connected by a drive chain. In the frame, a screw is installed with the possibility of movement, made with a support, in which a pressure roll is located in the bearings. Shims are installed on the backup rolls for centering the workpiece. A handle is provided for rotating the backup rolls, fixed on one of them. The result is improved efficiency and reduced labor intensity of the bending process. 2 ill.

Description

FIELD OF TECHNOLOGY

The utility model relates to the field of metal forming by pressure, in particular, to manual roll-forming equipment of the rolling type, is used in various spheres of industry, housing and communal services or in everyday life. The device can be used for the production of bent pipes, profiles, metal strips with a certain bending radius. The utility model can be used for the manufacture of greenhouses, hotbeds, house sheds, gazebos, swings, barbecues, decorative fences and gates.

LEVEL OF TECHNOLOGY

From the prior art patent RU No. 98953U1, IPC B21D9 / 05, published 10.11.2010, according to which a hydraulic station for the manufacture of bent tubular products is a hydraulic cylinder installed on a frame connected to a hydraulic pump with a rod carrying a removable bending template at its end, and two replaceable thrust swivel rollers fixed by axes on the frame perpendicular to the plane to the plane of movement of the bending template.

The disadvantage of this utility model is the need to connect the machine to electricity and water supply.

As the closest analogue, the pipe bender SU 1731353 A1, B21D 9/00, 05/07/1992 / 2 / is taken, containing a clamping screw and a frame with supports for the back-up rolls and the pressure drive roll and the back-up rolls and the pressure drive roll located in them.

The disadvantage of the prototype is the impossibility of bending the pipe along the radius.

The disadvantages of the prototype are eliminated by the claimed technical solution.

DISCLOSURE OF THE USEFUL MODEL

The technical challenge is to create a reliable device for bending pipes, profiles and metal strips, the design of which allows to reduce the labor intensity of the process.

The technical result, which the claimed solution is aimed at, is the creation of a reliable device that allows to increase the efficiency and reduce the labor intensity of the process of bending pipes, profiles and metal strips.

The technical result is achieved by the fact that in the claimed device the side rollers represent the support of the roll with bearings and back-up rolls with adjusting washers. In this case, the back-up rolls have sprockets in their design, which are connected to each other by a chain transmission by means of a drive chain, and one of the back-up rolls has a handle for rotating the rolls. In this case, during the operation of the device, the back-up roll itself moves, and the bearings are fixedly mounted in the roll support.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 - Pipe bender front view, top view.

FIG. 2 - Section A-A.

FIG. 1-2 the following positions are indicated:

1 - bed;

2 - roll support;

3 - support of the pressure roll;

4 - clamping screw;

5 - handle;

6 - backup roll;

7 - bearing;

8 - bearing sleeve;

9 - pressure roll;

10 - support bearing;

11 - lock nut;

12 - nut;

13 - thrust bearing;

14 - nut;

15 - handle;

16 - drive chain;

17 - an asterisk;

18 - adjusting washers;

19 - holes.

IMPLEMENTATION OF THE USEFUL MODEL

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

FIG. 1-2 shows the claimed pipe bender.

The pipe bender consists of a frame 1, which is in the form of an inverted letter "T", welded from channels and corner profiles. Two roll supports 2 are welded to the horizontal part of the frame 1, which are a channel with welded bushings for the bearing 8. In the upper part of the frame 1 there is a clamping screw 4, which is a rod with an external thread, to the upper part of which the handle 5 is welded for the convenience of rotation of the clamp screw 4. The clamping screw 4 has two locknuts 11 for fixing the depth of lowering the support of the clamping roll 3 when bending the workpiece, which makes it possible to produce products repeating the radii. For the accuracy of repeating the bending of the product, a ruler can be added to the vertical corner profile of the bed 1. With the help of the nut 12, the clamping screw 4 is attached to the upper part of the bed 1. To the lower part of the clamping screw 4 with the help of the nut 14 and the thrust bearing 13, the support of the pressure roll 3 is attached, which is a channel with welded bushings for the bearing 8. Roll supports 2 and the support of the pressure roll 3 contain bearings 7 and support bearings 10, which are fixed motionless in bushings for bearing 8. Support rolls 6 and pressure roll 9 are located in bearings 7 and support bearings 10, in supports of roll 2 and support of pressure roll 3, respectively, and during device operation move freely inside the bearings. The backup roll 6 and the pressure roll 9 are a bolt with a nut, and can also be a shaft that is fixed at both ends, or nuts, or pins, or pins or cotter pins, or other similar fasteners. Shims 18 are put on the backup rolls 6 and sprockets 17 are attached. Shims 18 are used to center the workpiece on the rolls. A handle 15 is attached to one of the support rolls 6. Two sprockets 17 and the drive chain 16 connecting them form a chain drive. Holes 19 located in the lower part of the bed 1 make it possible to fix the device on the working surface.

The device operates as follows.

To ensure the safety of the working process and create a stable structure, the tube bender frame 1 is fixed with a fastener through the holes 19 on the working surface. The pressure roll support 3 is in the upper position. The workpiece, which is planned to be bent, is placed on the support rolls 6 between the adjusting washers 18. Depending on the width of the workpiece, the washers are adjusted so that the workpiece on the support rolls 6 is located exactly without distortions. The clamping screw 4 is tightened with the handle 5, so that the clamping roller 9 in the support of the clamping roller 3 lowers down to the stop in the workpiece. With the help of the handle 15, the backup roll 6 starts to rotate. The backup roll 6 starts to move and, accordingly, the sprocket 17 starts to move, which, with the help of the drive chain 16, transfers the movement to the second sprocket 17 and the second backup roll 6. Such a design of rotation of the backup rolls 6 increases efficiency process and reduces its labor intensity. After the first rolling of the billet between the rolls, it acquires a small radius. To obtain the required radius of the workpiece, it is necessary to tighten the clamping screw 4, pressing the clamping roller 9 more strongly against the workpiece, and turn the knob 15 in the other direction, rolling the workpiece again. Such actions must be repeated several times until the desired radius is obtained. In order to obtain a series of blanks with the same radius, during the last rolling of the first blank, the locknuts 11 are fixed on the clamping screw 4 in order to fix the lower position of the clamping roll 9. Also, for a more visual and accurate tracking of the bending repeatability, the vertical corner profile of the bed 1 can a ruler to be added. After obtaining the desired radius of the workpiece, the clamping screw 4 is unscrewed, removing the pressure of the pressing roller 9 on the workpiece, and the bent product is released.

Claims (1)

A pipe bender containing a frame with supports having bearings, in which support rolls are installed with the possibility of rotation with attached sprockets connected to each other by a drive chain, and a clamping screw located in the frame with the ability to move and made with a support in which the bearings a pressure roll is installed, characterized in that it is equipped with adjusting washers for centering the workpiece, mounted on the backup rolls, and a handle for rotating the backup rolls, fixed on one of them.

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