RU222170U1 - Device for forming longitudinal recesses on shells - Google Patents

Abstract

The utility model relates to a device for forming longitudinal recesses on shells. The device contains a matrix, guides and a punch, with the possibility of influencing it with jacks. The punch consists of metal plates connected to each other by fastenings; the punch contains substrates with jacks installed on them, on which stops with holes for guides are located, and nuts are screwed on the ends of each guide. The technical result consists in creating a device of simple design. 7 salary f-ly, 3 ill.

Description

The utility model relates to mechanical engineering, to devices for metal forming and can be used in the fields of transport and chemical engineering, in the manufacture of tanks and boilers with drain necks and closed trays, railway tanks to create a drainage surface for a liquid product in these products.

The accuracy of the formation of longitudinal recesses on the shells of tanks and boilers is an important operation, since this affects the time and quality of draining the remaining liquid product from the inner surface of tanks and boilers into the drain neck.

A known installation for drawing necks in cylindrical shells ∅400÷800 mm. The installation includes a device for induction heating of the neck drawing zone, a power unit, a device for forming necks and two mechanized carts, one of which is intended for transporting the heating device, and the other for transporting the neck forming device. The power plant frame is welded from sheet material and installed in a pit. The shell clamp rod moves inside the hood rod. A trolley with a heating device is supplied to the shell installed on the matrix, the neck area is heated, after which the trolley returns to its original position. Then a trolley with a device for forming necks is fed into the exhaust zone. The cylinder rods are inserted and fixed into the neck forming device, the punch and the clamping device are secured. Then, by moving the rods down, the shell is pressed and the neck is pulled out. After this, the rods of the clamping cylinders move upward, and the clamping device is released. The loosened rods fall down under their own weight. The trolley with the device for forming necks is retracted to its original position, and the shell with the neck is removed from the matrix using a rotary tap (not shown) (RD 26.260.225-2001. Housings of cylindrical vessels and apparatus. Technology, quality assurance methods, developed by OJSC "VNIIGGGKhimnefteapparatura") .

The disadvantages of the known installation include its large dimensions and, accordingly, a large area that must be allocated in the workshop for its placement and installation. The design of the power plant presupposes the need to carry out technological operations related to the placement and fixation of the punch inside the shell, as well as pressing the shell itself to form a neck on it. To bring the installation to its original position, it is necessary to release the shell with the resulting neck, unfasten the punch and remove it from the working area.

The closest to the claimed device is an installation for forming longitudinal recesses on shells, containing a drive, a housing, a punch and a matrix. Moreover, it is equipped with a horizontal beam connected to the housing support posts, on which a punch is attached, having a working surface corresponding to the profile of the shell recess. Between the housing racks, one of which is folding, there is a matrix beam installed with the possibility of vertical movement in the guides. The axis of fastening one of the ends of the matrix beam and the guide is located in a hole made oval in the longitudinal direction. In interaction with the matrix, power cylinders are installed (jacks in the proposed technical solution) connected to the drive (utility model patent RU 2264878 (C1), IPC B21D 17/04, published 11/27/2005).

The disadvantages of this installation are the large dimensions and complexity of installing the device, including installation in the foundation, as well as limitations on the length of the shell. Another significant drawback is the impossibility of forming longitudinal recesses on the shells of tanks and boilers with internal devices (breakwaters, partitions), since the shell is inserted horizontally into the working area of the installation from the side between the matrix and the punch along the entire length of the shell.

The technical problem is the lack of a device of simple design, with reduced dimensions and expanded technical capabilities, which allows you to quickly and accurately form a longitudinal recess in the shell, regardless of its size.

The technical result consists in creating a device of simple design while ensuring ease of use, which makes it possible to easily form a longitudinal recess in the shell, regardless of their length and even if the tank or boiler has internal devices.

The technical result is achieved by the fact that, according to the utility model, a device for forming longitudinal recesses on the shells, containing a matrix, guides and a punch, with the possibility of acting on it with jacks, according to the utility model, the punch consists of metal plates interconnected by fasteners, substrates are placed on the punch with jacks installed on them, on which there are stops with holes for the guides, while at the ends of each guide there are nuts screwed onto each guide.

The punch can be removable.

The punch can be collapsible.

The matrix can be portable.

At least two nuts can be screwed onto the ends of the guides.

Fastening of metal plates can be done by bolting.

Fastening of metal plates can be done with a screw connection.

Fastening of metal plates can be done in the form of rivets.

The claimed utility model is illustrated by figures.

In fig. Figure 1 shows a general view of the device for forming longitudinal recesses on the shells (axonometry).

In fig. Figure 2 shows a general cross-sectional view of the device for forming longitudinal recesses on the shells.

In fig. 3 shows a side view of a device for forming longitudinal recesses on shells.

The positions on the device indicate:

1 - Matrix;

2 - Substrate;

3 - Punch;

4 - Jack;

5 - Stop;

6 - Nuts;

7 - Guides;

8 - Shell;

9 - Metal plate;

10 - Fastening metal plates.

The device for forming longitudinal recesses on the shells includes a matrix 1 with guides 7 rigidly fixed in the middle part. Matrix 1 has fairly small dimensions, which allows it to be easily moved to any desired location. A removable punch 3 is installed between the guides 7, which has a working surface corresponding to the profile of the recess of the shell 8. A feature of the punch 3 is that it is collapsible and consists of metal plates 9 interconnected by a fastener 10, which allows you to adjust the dimensions of the recess for the shells 8. The fastening 10 for metal plates 9 can be several options; it can be a bolted connection (bolt, washer, nut) or a screw connection (screw, washer, nut), and also if the metal plates 9 will not be separated, then fixation with a rivet is possible. On the punch 3, substrates 2 are placed, on which jacks 4 with stops 5 are installed. Nuts 6 are screwed onto the ends of the guides 7.

The use of stops 5 and nuts 6 in an amount of at least two is necessary to create sufficient resistance during operation of the jacks 4, which will increase the pressure on the substrates 2 and the punch 3 to form a recess in the shell 8.

The rather small dimensions of the matrix 1 and punch 3, as well as the simplicity of the design, make it possible to easily place the device on the shells of tanks or boilers with internal devices and form longitudinal recesses.

The inventive device operates as follows.

A shell 8 with a pre-cut hole for a drain device is vertically installed on the matrix 1, while the hole in the shell 8 is centered concentrically by the guides 7 of the matrix 1. A removable punch 3 is installed between the guides 7, so that the middle of the punch 3 coincides with the middle of the hole in the shell 8 After that, two substrates 2 are installed on the upper surface of the punch 3, on which jacks 4 are placed. On top of the jacks 4, stops 5 are inserted into the guides 7 through the holes and screwed with nuts 6 until they come into contact with stops 5.

When pressure is created in the jacks 4, the pistons (not shown in the drawings) move up and press on the stops 5. Since the movement of the stops 5 is prevented by the nuts 6 fixed on the guides 7, the influence of pressure and force on the jacks 4 occurs in the opposite direction, and namely, the jacks 4, through the substrates 2, press on the punch 3, which in turn presses into the middle part of the shell 8, forming a longitudinal depression on the shell that follows the profile of the punch 3. After the longitudinal depression has been formed, the pressure in the jacks 4 decreases and the pistons move down, then the device structure is disassembled piece by piece in the reverse order.

Thus, thanks to the claimed utility model, used for its intended purpose, the problem of creating a simple and easy-to-use device is solved, which allows the formation of longitudinal recesses on the shells, including the possibility of forming longitudinal recesses on the shells of tanks and boilers with internal devices (breakwaters, partitions), and also helps to expand technological capabilities by increasing the range of standard sizes and lengths of shells.

This device is easy to manufacture and maintain, and also has small dimensions, which allows the device to be mobile, as well as to be used and stored in various places in the production workshop.

Claims (8)

1. A device for forming longitudinal recesses on the shells, containing a matrix, guides and a punch, with the possibility of acting on it with jacks, characterized in that the punch is made of metal plates connected to each other by fastenings; substrates with jacks installed on them are placed on the punch; in which there are stops with holes for the guides, with nuts screwed on each guide at its ends. 2. The device according to claim 1, characterized in that the punch is removable. 3. The device according to claim 1, characterized in that the punch is collapsible. 4. The device according to claim 1, characterized in that the matrix is portable. 5. The device according to claim 1, characterized in that at least two nuts are screwed onto the ends of the guides. 6. The device according to claim 1, characterized in that the metal plates are fastened with a bolted connection. 7. The device according to claim 1, characterized in that the metal plates are fastened with a screw connection. 8. The device according to claim 1, characterized in that the fastening of the metal plates is made in the form of a rivet.