RU217574U1 - PIPE CUTTING PIECE - Google Patents

Abstract

The utility model relates to the field of metal forming and can be used in various industries, housing and communal services or in everyday life for cutting shaped pipes into blanks in a pipe bender. The die for cutting pipes in a pipe bender consists of a punch and a die, while the punch is a knife (4) fixed on a support (8) of the clamping screw (7), and the die is a prefabricated structure with a closed receiving cavity, consisting of two outer plates (1) and inner plates (2) with a rectangular hole at an angle, and two central plates (3), which act as guides for the knife (4) that slides between them, installed in the bed (6). 6 ill.

Description

FIELD OF TECHNOLOGY

The utility model relates to the field of metal forming and can be used in various industries, housing and communal services or in everyday life for cutting shaped pipes into blanks in a pipe bender.

BACKGROUND OF THE INVENTION

A device for cutting pipes is known from the prior art, patent RU No. 173069 (U1, IPC B23D 21/00, B23D 23/04, B26D 3/16, published on 08/08/2017), in which the device is made in the form of a stamp containing a lower a part with a die holder, in which two semi-dies are placed, made with receiving open cavities for placing pipes and fastened with pins, and an upper part with a punch holder, in which a flat knife is fixed, made in the form of a guillotine with an angle at the top of 6-9 ° and installed with the possibility vertical movement towards the said receiving open cavities, while the half-matrices are provided with spacers placed between them and are made in the form of plates mirrored with the formation of a groove between them for entering a flat knife at an angle of 30°, 60°, 45° and 90°, having recesses on the sides to remove metal waste when cutting pipes.

The disadvantage of this analogue is the bulky design of the stamp, the need to use a press to carry out the process of cutting pipes, which makes it impossible to use the device in everyday life.

A pipe cutter-guillotine is known, published on the website https://discount-tools.ru/catalog/tmborez-gilotina/tmborez-gilotina-211512/ (date of access to the site 02/20/2023), containing a frame, a clamping screw, a support on which a guillotine knife is attached.

The disadvantage of this analogue is the unstable design of the pipe cutter and the impossibility of cutting metal pipes.

As the closest analogue, a stamp for cutting pipes was chosen https://keyprod.ru/chertegy-technologyyI-proizvodstva/metallobrabotka/shtamp v/pri merv-shtampov/shtamp-dlya-rezki-trub-diametrom-8-30-mm-i -st/ (date of access to the site 2.02.2023), in which the working parts of the stamp are a flat cutting punch having a shaped sharpening, and a matrix, inside of which a round hole is made for the passage of the pipe, the upper slot for entering the punch serves as a guide, into the lower slot waste is pushed through when cutting.

The disadvantage of the prototype is the complex design of the stamp and the need to use a press to work with the stamp.

The disadvantages of the closest analogue eliminates the proposed technical solution.

DISCLOSURE OF THE ESSENCE OF THE UTILITY MODEL

The technical task is to create a compact and easy-to-use device for cutting profile pipes in a pipe bender with the ability to work with the device in domestic conditions.

The technical result, to which the claimed solution is directed, is the creation of a compact device for cutting profile pipes.

The technical result is achieved in that the punch for cutting pipes in the pipe bender contains a punch and a matrix, while the punch is a flat knife with holes for fixing on a support, and the matrix is a prefabricated structure mounted on a frame, consisting of plates, such as outer plates , internal and central, fixed to each other by threaded connections, while in the outer and inner plates a rectangular hole is made, located at an angle, and the central plates are located in such a way that they act as guides for the knife.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 - Stamp for cutting pipes, front view, side view.

Fig. 2 - Stamp for cutting pipes isometry.

Fig. 3 - Die plates for pipe cutting.

Fig. 4 - Positions of the knife during cutting, position 1 (a) and position 2 (b).

Fig. 5 - Application, assembly based on front view, side view.

Fig. 6 - Application case, assembly based on isometry.

Figures 1-6 show the following items:

1 - outer plate;

2 - inner plate;

3 - central plate;

4 - knife;

5 - mount;

6 - bed;

7 - clamping screw;

8 - support.

IMPLEMENTATION OF UTILITY MODEL

The following describes in detail all the components of this utility model 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. 1-6 show the claimed pipe cutting die.

The die for cutting pipes contains an upper part - a punch and a lower part - a matrix, while the punch is a flat knife 4, and the matrix with a closed receiving cavity is a prefabricated structure consisting of two outer plates 1 and inner plates 2 with a rectangular hole located at an angle, and two central plates 3, which act as guides for the knife 4, which slides between them. The plates are interconnected by means of threaded connections. The number of matrix plates with this assembly option is 5 pieces and this number can be increased due to the outer plates 1 and inner plates 2, i.e. the pipe cutting die may contain additional outer plates 1 or inner plates 2, or both additional outer plates 1 and inner plates 2. The prefabricated design of the die has the advantage of ease of manufacture of the die plates and the possibility of replacing a separate plate when worn.

The outer plates 1 and the inner plates 2 are in the form of an inverted "T" with a rectangular hole angled to fit into the hole of the shaped pipe. The size of a rectangular hole allows you to place profiles 40x20, 20x20, 15x15, 10x10 mm in it. When cutting a profile pipe 40×20 mm, knife 4 is fixed on support 8 in position 1 (Fig. 4a), so that the corner of the knife edge is located directly above the corner of the profile pipe. When cutting a profile pipe with dimensions of 20 × 20, 15 × 15. 10×10 mm knife 4 is fixed on the support 8 in position 2 (Fig. 4b). The outer plates 1 and the inner plates 2 have a small protrusion in the lower part, designed to fix the matrix in the frame 6, preventing the matrix from moving during the cutting process. The inner plates 2 have a cutout below the rectangular hole, and this cutout is designed for easy removal of metal waste when cutting.

Knife 4 is a plate with an asymmetrical cutting edge, the tip of which, when cutting, is located above the corner of the profile pipe, which contributes to obtaining a smooth cut, the absence of defects during cutting. In the upper part of the knife 4 there are ears with holes for fixing the knife 4 on the support 8 using the fasteners 5. Cotter pins, pins, bolts with a nut or nuts, a stud with nuts, a finger can act as a fastener 5. Support 8 with a knife 4 is fixed on the clamping screw 7, which is located in the frame 6 with the ability to move up and down.

The operation of the device is as follows.

A stamp for cutting pipes is installed in a cutting device - a pipe bender, for this, a knife 4 is fixed on a support 8 using fasteners 5, and a matrix consisting of outer plates 1, inner plates 2 and central plates 3, fixed to each other by threaded connections, is installed in frame 6. The profile pipe is inserted into a rectangular hole located in the matrix plates at an angle, so that the knife, when cutting, touches the corner of the profile with its tip. Knife 4 is mounted on support 8 depending on the size of the profile pipe.

Consider the option when cutting a profile pipe 40 × 20 mm. In this case, the knife 4 is fixed on the support 8 in position 1 (Fig. 4a), so that the corner of the knife edge is located directly above the corner of the profile pipe.

After the stamp for cutting pipes and the profile are installed, they begin to tighten the clamping screw 7 located in the frame 6, on which the support 8 is fixed. At the same time, the knife 4 starts to go down and cuts the profile pipe, as if squeezing out a part of the profile pipe. The metal waste during cutting freely falls down due to the cutouts in the inner plates 2. After cutting the profile pipe, the clamping screw 7 is unscrewed, while the knife 4 rises up. The cut pipes are removed. If necessary, the process is repeated.

If it is necessary to cut profile pipes with a cross section of 20×20, 15×15, 10×10 mm, knife 4 is moved on support 8 to position 2 (Fig. 4b) and cutting is performed.

Claims (3)

1. A die for cutting shaped pipes in a pipe bender, containing a punch and a matrix, characterized in that the punch is a flat knife with holes for fixing on a support, and the matrix is a prefabricated structure that can be installed on the pipe bender frame, consisting of external, internal and central plates fixed to each other by threaded connections, while in the outer and inner plates a rectangular hole is made, located at an angle, and the central plates are arranged in such a way that they act as guides for the knife. 2. A stamp according to claim 1, characterized in that it contains additional outer plates. 3. A stamp according to claim 1, characterized in that it contains additional internal plates.

Images