RU206449U1 - Pipe bender - Google Patents

Abstract

The utility model relates to the field of metal forming and can be used for bending metal profiles and bars. The pipe bender contains a frame with a thrust plate and a pressure pin, which provides movement of the pressure shaft located in the central bearing assembly. The side support shafts located in the bearing units are fixed on the bed. The thrust plate can be removed from the bed to ensure the extraction of the pressure shaft. On the walls of the bed, holes are arranged in a row for fixing the side support shafts in them for their rearrangement relative to the axis of rotation of the pressure shaft. A handle is installed on the pressure shaft to rotate it. As a result, it is possible to obtain products with a small bending radius, including those with a closed loop. 1 ill.

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 a 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]. Using the known solution, it is not possible to manufacture products bent into a closed arc (ring), since this frame is made non-separable in the upper part, and it is impossible to extract the finished product (ring). In addition, in the known pipe bender, the lateral support shafts are rigidly fixed in the frame, which also does not allow obtaining products with a small bending diameter, including rings.

The technical result achieved by the claimed utility model consists in creating an easy-to-use pipe bender, which makes it possible to obtain products of small bending diameters, including those with a closed loop (rings).

To achieve the specified technical result, a pipe bender is declared containing a bed with a thrust plate and a pressure pin, made with the ability to move the pressure shaft located in the central bearing unit, side support shafts and a handle for rotating the shaft, fixed on the bed and located in the bearing units, that the thrust plate is removable from the bed to ensure the extraction of the pressure shaft, the walls of the bed are made with holes arranged in a row for fixing the side support shafts in them with the possibility of their rearrangement relative to the axis of rotation of the pressure shaft, and the handle for shaft rotation is installed on the pressure shaft.

In contrast to the prototype [3], the claimed utility model is made with the ability to quickly remove the thrust plate and remove the pressure shaft. It is also possible to rearrange the side support shafts to the required distance to the axis of rotation of the pressure shaft by means of a number of holes made on the front and rear walls of the bed, to obtain products with a small bending diameter, including rings.

The utility model is illustrated in Fig. 1, which shows a three-dimensional model of the claimed pipe bender, where:

1 - bed;

2 - push pin;

3 - thrust plate;

4 - thrust bearing;

5 - supporting part;

6 - pressure shaft;

7 - lateral support shaft;

8 - thrust plate guide;

9 - holes in the walls of the bed;

10 - handle for rotation.

The pipe bender contains a frame 1 with a pressure pin 2 with a thrust bearing 4, fixed on a thrust plate 3, made removable from the walls of the frame 1. The pin 2 is configured to move the pressure shaft 6 located in the central bearing assembly. In the walls of the frame 1, a number of holes 9 are made for fixing the lateral support shafts 7 with the possibility of rearranging these shafts. The pipe bender also contains a handle for rotating the pressure shaft 10.

Example.

The pipe bender contains a frame in the form of an inverted "T", made by welding from channels and corners, or 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. The thrust plate 3 is removable from the frame 1, it is inserted into the cutouts made in the guides 8, which are bolted to the walls of the frame 1. A thrust bearing is put on the lower end of the thrust pin 2 4.

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. 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 walls of 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 side 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 7 may contain steps machined 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 10 is installed on the pressure 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.

To obtain a product closed in a ring, the side support shafts 7 are fixed in the holes closest to the axis of rotation of the pressure shaft in the walls of the bed 8. The workpiece is placed on the side support shafts 7 and fixed by means of steps, adjusting rings or type washers. The pressure pin 2 is twisted so that the pressure shaft 6 goes down and rests against the workpiece. By turning the handle 10, the pressure shaft 6 begins to rotate, moving the workpiece through the side shafts 7, rolling through which bends the profile into an arc. Next, you need to tighten the pressure pin 2, lowering the pressure shaft even lower and turn the knob 10 in the other direction. Such actions should be performed several times before obtaining products with a closed circuit (rings). After that, the pressure pin 2 is unscrewed, the guides of the thrust plate 8 are unscrewed, the central bearing assembly with the pressure shaft 6 is removed and the resulting product made in the form of a ring is taken out.

Thus, the use of the claimed pipe bender makes it possible to obtain products with small bending radii, as well as products with a closed circuit (rings).

Claims (1)

A pipe bender containing a bed with a thrust plate and a pressure pin, configured to move the pressure shaft located in the central bearing unit, side support shafts and a handle for rotating the shaft attached to the bed and located in the bearing assemblies, characterized in that the thrust plate is made with the ability removal from the bed to ensure the extraction of the pressure shaft, the walls of the bed are made with holes arranged in a row for fixing the side support shafts in them with the possibility of their rearrangement relative to the axis of rotation of the pressure shaft, and the handle for shaft rotation is installed on the pressure shaft.

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