RU206957U1 - Pipe bender - Google Patents

Abstract

The utility model relates to the field of metal forming and is used as equipment for bending metal profiles and bars. The pipe bender contains a frame with a pressure pin for moving the pressure shaft, side support shafts attached to the frame, a handle for rotating the shaft, while the pressure shaft contains a protrusion located in the working area of the pressure shaft. The technical result is to obtain high-quality bent products, without surface defects in the form of waves. 2 c.p. f-crystals, 2 fig.

Description

The utility model relates to the field of metal forming and is used as equipment for bending metal profiles and bars. The machine can be used to make curved metal elements for decorating fences, gates, awnings, country furniture.

Known device for processing products Maksimova E.N., containing a frame, a bending unit with a bending template and a lever with a roller and a cutting unit containing a bar with a cutting roller, located between the existing stand of the bending unit's frame and a clamping screw, and also containing clamping jaws and support rollers (AS USSR 1826930, publ. 07.07.1993) [1]. This device is characterized by a complex design.

A device for bending metal rods is known, including a plate with a body fixed on it, two stops, one of which is located on the plate, and the second on the working surface of the body, a clamping nut located in the same axis with a stop, is installed on the side walls of the body a lever with a roller through the axis, and a vertical groove is made in the front surface of the body to form the bending radius (RF Patent 80368, publ. 10.02.2009) [2]. The known device assumes the stage of preheating the workpiece, which complicates its use.

Known pipe bender containing a bed 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 bed with the ability to move and made with a support in which in a pressure roller is installed in the bearings. The known pipe bender 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 (RF Patent 201456, publ. 12/15/2020) [3]. In the known solution, a straight pressure shaft is used, and during operation, when the shaped tube is bent into small radii, for example, 2.5 m or less, the inner side of the shaped tube is deformed in the form of waves.

The technical result achieved by the claimed utility model consists in creating a device for bending metal profiles and rods, which ensures the production of high-quality bent products, without surface defects in the form of waves.

To achieve the specified technical result, a pipe bender is declared containing a bed with a pressure pin, made with the ability to move the pressure shaft located in the central bearing unit, side support shafts mounted on the bed, and a handle for rotating the shaft mounted on the pressure shaft, characterized in that the pressure shaft is made with a protrusion located in its working area.

The pipe bender may contain a pressure shaft protrusion made in the form of a step.

The tube bender may include a barrel-shaped pinch shaft protrusion.

In contrast to the prototype [3], in which, according to the drawings, a straight shaft is used, in the claimed utility model, the implementation of a shaft with a protrusion in the center of its working area avoids the occurrence of deformations in the form of waves on the surface of the workpiece being bent, especially in small radii. In this case, the working area of the pressure roll is defined as the area intended for direct contact with the workpiece - for pressing it during bending. The presence of the protrusion allows the metal to bend inward in the middle of the shaped tube, preventing the appearance of deformations in the form of waves on the inner surface of the rolled billet.

The utility model is illustrated in Fig. 1, which shows a three-dimensional model of the claimed pipe bender, as well as Fig. 2 is a three-dimensional image of the pressure shaft, where

1 - bed;

2 - push pin;

3 - thrust plate;

4 - thrust bearing;

5 - supporting part;

6 - pressure shaft;

7 - lateral support shaft;

8 - handle for rotation;

9 - working area of the pressure shaft;

10 - protrusion on the working area of the pressure shaft.

The pipe bender contains a frame 1 with a pressure pin 2 with a thrust bearing 4, fixed on the thrust plate 3. The pin 2 is made with the ability to move the pressure shaft 6, located in the central bearing assembly. A protrusion 10 is formed on the pressure shaft 6 in its working area 9. In the frame 1, two lateral support shafts 7 are fixed. The pipe bender also contains a handle for rotation 8 mounted on the pressure shaft 6.

Example

The pipe bender contains a frame 1 in the form of an inverted letter "T", welded from corners and channels made of high-quality metal, or welded from sheet metal plates with technological cutouts and holes.

In the upper part of the bed 1 there is a push pin 2 made in the form of a rod with an external thread, to the upper part of which a handle for rotation can be welded. The stud 2 is fixed, for example, by means of a nut on the thrust plate 3, welded in the upper part of the bed 1. In this case, the thrust bearing 4 is put on the lower end of the thrust stud 2.

The central bearing unit consists of two cages, in which bearings are placed, on top of which a support part 5 is welded, made in the form of a channel. In the specified unit, a pressure shaft 6 is placed, which is fixed with a nut or other fastening element. In the working area of the pressure shaft 9, a protrusion 10 is milled either in the form of a step, for example, 30 mm wide, or with the formation of a barrel-shaped shaft 6. A hole is made in the center of the support part 5, the lower edge of the pressure pin 2 is inserted into it, which is riveted by means of electric welding.

In the holes in the frame 1, by means of, for example, bolts, the lateral support shafts 7 placed on the axle are fastened, placed in the bearing assemblies, which are cages with bearings. For centering and fixing the workpiece, the lateral support shafts 7 may contain adjusting rings or washers, selected depending on the size of the workpiece with the ability to ensure the washers abut against the side shaft bearing. Alternatively, the lateral support shafts may contain steps turned in them, located symmetrically relative to the middle of the shaft 7, while the diameter of the shaft 7 decreases at each step in the direction from the ends of the shaft 7 to its middle.

The handle for rotation 8 is installed on the drive shaft 6, which rotates and provides movement of the workpiece, bending into an arc.

The utility model works as follows.

Profile pipes or solid rods, square or rectangular in cross-section, can be taken as a workpiece. The workpiece is placed on the side support shafts 7 and is fixed either by adjusting rings, or by means of steps machined on the shafts 7, or by means of a set of washers. The pressure pin 2 is twisted so that the pressure shaft 6 goes down and rests against the workpiece. By turning the handle 8, the pressure shaft 6 begins to rotate, moving the workpiece through the side shafts 7, rolling through which bends the profile into an arc. In this case, the protrusion 10 breaks the stiffening rib and bends the metal into the inside of the shaped pipe, providing a product bent into an arc with an even inner surface, without defects in the form of waves.

Claims (3)

1. A pipe bender containing a bed with a pressure pin made with the possibility of moving the pressure shaft located in the central bearing unit, side support shafts fixed on the bed, and a handle for rotating the shaft mounted on the pressure shaft, characterized in that the pressure shaft is made with a protrusion located in its working area. 2. A pipe bender according to claim 1, characterized in that the projection of the pressure shaft is made in the form of a step. 3. A pipe bender according to claim 1, characterized in that the pressure shaft is barrel-shaped.

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