UA72357A1 - Device for gas detonation forming - Google Patents

Abstract

Utilization: plastic metal working, the articles production under conditions of the articles individual and small-lot production using forming or parting. Essence of invention: device for gas detonation forming has the pulse chamber with detonation tube placed over the blank, the source of gaseous power carrier in form of gas generator, which casing is mounted on the chamber and has the working cavity partially filled with gas forming reagents, connected through a channel to the chamber cavity, and the lighting up unit. The channel, unifying the chamber and gas generator cavities, is executed in form of the tubes block with diameter not more then critical for gas power carrier. In working cavity of gas generator is mounted an activator in form of tube-coil, one end of its tube is placed in the channel, unifying the cavities of the chamber and gas generator, and the other û over the level of gas forming reagents. The gas generator casing is executed in toroidal form and is located coaxially to the pulse chamber, and is provided with heat supplying plates on the surface turned to the blank. The heat supplying plates are connected to the gas generator casing with the aid of hinges.

Description

The invention relates to the processing of metals by pressure and can be used in the production of products in the conditions of individual and small-scale production by stamping or division into parts.

The purpose of the invention is to expand technological capabilities, reduce costs and increase work safety.

Figure 1 shows a longitudinal section of the device, general view; Fig. 2 shows a gas generator with heat-dissipating plates, longitudinal section; Fig. 3 is a pulse chamber with heat-dissipating plates, plan.

The device contains a pulse chamber 1 with a sealing unit 2 in the form of an easily destructible membrane and a detonation one, a pipe 3, a unit 4 for pressing the energy carrier 5, a gas generator 6, the body 7 of which is mounted on the chamber and has a working cavity partially filled with gas-forming reagents, which communicates with the pulse cavity through a channel 8 chambers;

The gas generator is equipped with channels 9 and 10, respectively, for the supply of the reagent and the removal of reaction products, which are hermetically closed during the generation of the energy carrier (covers are conditionally not indicated).

Substances that form combustible gas or gases that, when mixed with the air of the device, form an explosive mixture-detonator can serve as reagents.

Such substances can be acids and metal! (depletion of hydrogen), calcium carbide and water (depletion of acetylene), etc.

The gas generator is equipped with a cover 11. In the cavity of the gas generator, an activator 12 is mounted in the form of a coil, one end of the tube 4 of which is placed above the level of reagents 13 filling the cavity of the gas generator (indications are conditional), and the other B is located in the channel connecting the cavity of the pulse chamber! and gas generator. The channel connecting the cavity of the gas generator and the impulse chamber is filled (Fig. 2) in the form of a block of tubes 14 with a diameter not exceeding the critical one for a gaseous energy carrier, for example, for acetylene - no more than 2103 m. The body 7 of the gas generator is torus-shaped, located coaxially with the impulse chamber and equipped with heat-dissipating plates 15 on the surface facing the workpiece. Heat-dissipating plates 15 are hingedly connected to the gas generator body. For more intensive heating of the workpiece, heat-supplying plates! they can beat viipolnen! in the form of sectors (Fig. 3) made of copper or another material with high thermal conductivity.

The gas generator is mounted at an angle c; to the axis of pulse cameras within 20""х457.

The device works as follows.

A gas generator 6 with a cavity volume of m corresponding to the maximum pressure in the cavity of the impulse chambers is pre-mounted on the pulse chamber 1 with sealing unit 2. The size of the volume of the gas generator can be found approximately according to the Boyle-Mariotte law:

Rmg- Ryhk (Mikhk. no mg), where P, Ryk are, respectively, the initial pressure in the gas generator cavity and the pressure in the pulse chamber cavities (equal to the final pressure in the gas generator cavity after gas expansion). mg; Mich. - respectively the volume! gas generator and pulse chamber!.

From here, after a simple conversion, you can determine the required volume of the gas generator.

Sh 1

Mu - Mykhk. AND:

Cancer

For technological processes of sheet stamping, it has been established experimentally in most cases, using acetylene as an energy carrier, that the ratio of pressures in the gas generator and pulse chamber set for structural reasons should not exceed 2-10, which allows selecting a gas generator of the minimum volume that meets the requirements for the production of parts from of various materials and standard sizes with the provision of the necessary pressure during stamping.

After the installation of the gas generator, the device is placed on the workpiece (not shown) and the reagent is introduced into the cavity of the gas generator through channel 9 (or channel))! for generation of gaseous energy carrier. When acetylene is used as an energy carrier, water is first placed in the gas generator chamber, and then calcium carbide is introduced ("carbide in water" system), simultaneously sealing channel 8 with a cap or plug (not shown).

The de-energizing agent 5 released during the reaction of reagents 13 (for example, calcium carbide and water) accumulates in the gas generator tank and is squeezed out under increased pressure (up to 200 kPa and more) through channel 8 into the cavity of the pulse chamber until it is equalized and pressed into the gas generator.

When the required initial pressure Ryh -:15...2200 kPa is reached, the ignition unit 4 ignites and detonates the energy carrier 5 in the detonating tube C and the impulse chamber 1.

There is an explosion, stamping of the part and depressurization of the device.

During the chemical reaction between the reagents and the generation of the energy carrier, the tube of the activator coil heats up to high temperatures (up to 200 or more degrees), which contributes to the evaporation of the available water particles in the energy carrier and their splitting into atoms, i.e. activation of the combustible mixture. This is also facilitated by placing a block of tubes 14 in channel 8, which are an element of resistance and increasing the contact time of the energy carrier with the activator, as well as the installation of the gas generator at an angle of 20"so"x45"Kk to the axis of the pulse chambers!.

Due to the high temperature effect during the generation of an energy carrier, for example, acetylene, the gas generator is filled in the form of a toroidal container (Fig. 2, 3) and mounted coaxially with the pulse chamber.

To increase the plasticity of the processed workpiece, to reduce the deformation forces by increasing the heat transfer zone around the gas generator, its lower surface, heat-dissipating plates 15 are hinged, the total area of which corresponds to the dimensions of the workpiece surface. The released heat contributes to the heating of parts of the workpiece to temperatures of 150-250702 (depending on the amount and composition of reagents).

After stamping the blank and ventilating (ventilating) the product into the atmosphere, the detonation opens channel 10 of the gas generator, through which the liquid or solid product is removed! reactions by rinsing or shaking off in a specially designed settling tank. After that, the processing cycle ends and the device is transported to the part processing area, starting to prepare the device for stamping. ; 5 No and , . ak ANNA v. I and I 8,789. ; h "Y son"

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Claims (5)

1. A device for detonation gas stamping, containing an impulse chamber with a detonation tube placed above the workpiece, a source of gaseous energy carrier supplied to the chamber, an ignition block, characterized by the fact that, in order to expand technological capabilities, reduce costs and increase work safety, the source of gaseous energy carrier is installed in in the form of a gas generator, the body of which is mounted on the chamber and has a working cavity partially filled with gas-forming reagents, which is connected by a channel with the cavity of the chamber. 2. The device according to point I, characterized by the fact that the channel connecting the chamber cavity and the gas generator is suspended in the form of a block of tubes with a diameter not exceeding the critical one for the gas energy carrier. 3. The device according to item I, characterized by the fact that it is equipped with an activator in the form of a coil installed in the working cavity of the gas generator, one end of the tube of which is located in the channel connecting the cavity of the chamber and the gas generator, and the other - above the level of gas-forming reagents. 4. The device according to point I, characterized by the fact that the gas generator body is filled with a toroidal shape, located coaxially with the pulse chamber and equipped with heat-dissipating plates on the surface facing the workpiece. 5. The device according to claims 1-4, characterized by the fact that the heat-dissipating plates are hingedly connected to the gas generator body.