RU205567U1 - Pipe bender - Google Patents

Abstract

The utility model relates to the field of metal forming, in particular to manual roll-forming equipment of the rolling type, used in various industries, housing and communal services or in everyday life. The pipe bender consists of a bed, consisting of two walls made of sheet steel, interconnected by connectors, to which two roll supports are attached using bolts and nuts, a pressure roll support, with welded bushings for a bearing for support bearings, a pressure screw. In this case, there are holes in the walls of the bed. The backup rolls are located in the bearings of the roll in bearings, they are a bolt with shims and a nut, to which an asterisk is attached. In this case, a handle is attached to one of the backup rolls. A drive chain is fitted on two backup rolls on sprockets. The nip roll is located in the nip roll support in support bearings. The clamping screw is a rod with an external thread with two locknuts, in the upper part of which a handle is welded. The thrust bearing is located in the lower part of the pressure screw above the support of the pressure roll. In the lower part of the bed there are holes for fixing the device to the working surface. 4 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, 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

The closest analogue is known patent RU No. 201456U1, IPC B21D7 / 08, published on 15.12.2020, according to which a pipe bender was registered, containing a frame with supports having bearings, in which support rolls are installed with the possibility of rotation with attached sprockets connected to each with another drive chain, and a clamping screw located in the bed with the ability to move and made with a support in which a pressure roll is installed in the bearings, characterized in that it is equipped with adjusting washers for centering the workpiece mounted on the support rolls, and a handle for rotating the support rolls rolls fixed on one of them ”.

The disadvantage of the analogue is the rigid fixation in one position of the backup roll supports on the bed. This feature does not allow changing the minimum and maximum bending radius of the workpiece. Adjustment of the bend radius of the workpiece is limited by the stroke of the pressure roll.

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, easy-to-use device for bending shaped and round pipes, metal strips, the design of which allows you to get products of different radii on one device.

The technical result to be achieved by the claimed solution is the creation of a device that allows you to combine a variety of technical solutions, thereby increasing the variability, unifying and expanding the volume of manufactured products.

The technical result is achieved by the fact that in the claimed device the frame contains holes for fixing the roll supports, and the roll supports are fixed on these holes using bolts and nuts. This allows you to rearrange the roll supports on the bed in relation to the pressure roll - to put them closer and further (both vertically and horizontally) from it, thereby obtaining different amplitudes of bending radii of the workpiece.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 - Front view of the pipe bender.

FIG. 2 - Pipe bender side view.

FIG. 3 - Roll support with bearing.

FIG. 4 - Types of rolls.

FIG. 1-4 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 - thrust bearing;

13 - handle;

14 - drive chain;

15 - an asterisk;

16 - adjusting washers;

17 - holes;

18 - connector;

19 - ruler;

20 - holes;

21 - nut.

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. 1-4 shows the claimed pipe bender.

The pipe bender consists of a frame 1, which consists of two walls cut from sheet steel and interconnected by means of connectors 18, which are a bolt with a sleeve and a nut, roll supports 2 with backup rolls 6 and a channel in the upper part. Connectors 18 can also be a pin with a sleeve and two nuts. The lower part of the walls of the frame 1 is bent perpendicularly and there are holes 20 in it, or plates with holes 20 are welded to it perpendicularly, which are necessary for attaching the pipe bender to the working surface. In the central part of the bed 1, along the cutout in the walls, the support of the pressure roll 3 with the pressure roll 9 moves up and down, which is driven by the pressure screw 4, which abuts against the thrust bearing 12, the handle 5 is installed in the upper part of the pressure screw 4 for convenience its rotation. The direction of movement of the clamping screw 4 is transmitted by the nut 21, which is welded to the channel of the bed 1. 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 repetition of the bending of the product, a ruler is added to the wall of the bed 1 next to the rectangular hole 19. The supports of the roll 2 and the support of the pressure roll 3 contain bearings 7 and support bearings 10, which are fixed immovably in the bushings for the bearing 8. The support rolls 6 and the 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 operation of the device move freely inside bearings 7. Support roll 6 and pressure roll 9 are a bolt with a nut. Supports of rolls 2 are attached to the bed 1 with bolts and nuts and represent a plate to which a bushing for bearing 8 is welded. A bearing 7 is pressed into each bushing under bearing 8. Shim washers 16 are put on support rolls 6 and sprockets 15 are attached. 16 are used to center the workpiece on the rolls. A handle 13 is attached to one of the backup rolls 6. Two sprockets 15 and a drive chain 14 connecting them form a chain drive. With the handle 13, the chain drive is set in motion. A feature of this utility model is the presence of holes 17 in the walls of the bed 1, which makes it possible to move the supports of the rolls 2 with the backup rolls 6 on the bed 1 in relation to the pressure roll 9, put them closer and further (both vertically and horizontally) from it, thereby obtaining a different amplitude of the bending radii of the workpiece. If necessary, the drive chain 14 is changed to a longer one or shortened using a standard lock on the chain. Back-up roll 6 and pressure roll 9 can have different configurations and can be changed if necessary, for example, it can be rolls for rolling round tubes - conical (all three and back-up and pressure rolls), back-up rolls with grooves for standard profile widths - 10, 20, 30, 40, 50, 60 mm, barrel-shaped nip roll, collar nip roll, rhombic nip roll, raised to center, back rolls serrated to avoid slipping.

The device operates as follows.

To ensure the safety of the working process and create a stable structure, the pipe bender frame 1 is fixed with a fastener through the holes 20 on the working surface. The pressure roll support 3 is in the upper position. Select suitable, to obtain a certain result, roll supports 2 with backup rolls 6, pressure roll 9. Roll supports 2 with backup rolls 6 are fixed by means of connectors 18 on in the selected position in holes 17 on bed 1. Drive chain 14 of suitable length is placed on asterisks 15. The workpiece, which is planned to be bent, is placed on the backup rolls 6 between the adjusting washers 16. Depending on the width of the workpiece, the washers are adjusted so that the workpiece on the backup rolls 6 is located evenly 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 13, the backup roll 6 begins to rotate. The backup roll 6 starts to move and, accordingly, the sprocket 15 starts to move, which, with the help of the drive chain 14, transfers the movement to the second sprocket 15 and the second backup roll 6. 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, pushing the clamping roller 9 more strongly against the workpiece, and turn the knob 13 to the other side, rolling the workpiece several more times until a given 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 to fix the lower position of the clamping roll 9. For a more visual and accurate tracking of the repeatability of the bending of the product, use a ruler 19. After obtaining the desired blank radius unscrew the clamping screw 4, removing the pressure of the clamping roll 9 on the workpiece, and release the bent product.

Claims (1)

A pipe bender containing back-up rolls, a frame with roll supports having bearings, in which the back-up rolls are rotatably mounted with sprockets attached to them, 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 a pressure roll is installed in the bearings, characterized in that holes are made in the frame for fixing the said roll supports, and the roll supports are fixed in these holes with bolts and nuts.

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