Device for magnetic-pulse forming axisymmetric shells

 

The invention relates to the field of magnetic-pulse treatment of metals and can be used in engineering when receiving axisymmetric shells from tubular blanks. The device has an operating winding and ferromagnesium. The winding is made with the possibility of placing it outside the workpiece. Ferromagnesium designed in such a way that one of its elements placed inside the workpiece. Ferromagnesium can be performed in a closed O - or f-shaped. The result is improved efficiency of magnetic pulse deformation of workpieces and obtaining a given deformation in the lower energy process. 2 C.p. f-crystals, 3 ill.

The invention relates to the field of magnetic-pulse treatment of metals and is intended for use in mechanical engineering in shaping the tubular semi-finished products (billets).

Known inductor for magnetic-pulse treatment of metals [USSR author's certificate 1311086, CL 21 D 26/14, 1985], consisting of mounted on the insulating sleeve spiral with grooves on the outer corners of the cross-section of a coil, the current leads. Between the turns of the spiral set is okladki not get relative radial movement, prevent the formation of non-hedged insulation sections of the spiral and arcing.

However, the known device has the disadvantage as uneven pressure generated magnetic field, which leads to tool wear and excessive power consumption.

The closest adopted for the prototype, is the inductor for magnetic-pulse treatment of metals [USSR author's certificate 329934, CL 21 D 26/14, 1972], which contains the hub with a radial section and an axial bore which serves to space the workpiece, and a working winding, located in grooves on the outer surface of the hub and having outputs for connection to a power source, characterized in that, in order to reduce the load on the source of the high frequency inductor provided with a ferromagnetic core with a closed magnetic circuit, located in the hub around the axis of the hole.

This device has a number of disadvantages: the low value of the magnetic induction vector and, thus, reduce the pressure of pulsed magnetic field on the workpiece, reducing the efficiency of the installation.

Task to be solved by the present invention is directed, is to increase afci while reducing energy consumption.

The required technical result is achieved in that the device for magnetic-pulse forming axisymmetric shells includes a working coil, which is placed outside the workpiece, and ferromagnesium, which is made with the possibility of placing one of its elements inside the workpiece. Ferromagnesium can be performed in a closed O-shaped or closed f-shaped. The result is the ability due inserted into the billet ferromagnitodinamika to increase the intensity of the magnetic flux, the pressure pulse magnetic field of the inductor on the workpiece and, accordingly, increase the degree of deformation of the workpiece.

The proposed device for magnetic-pulse stamping of pipes, consisting of an inductor and a magnetic core, which may be made of different ferromagnetic materials with different geometrical dimensions and configuration increases the efficiency of the process of magnetic-pulse stamping with the same charge energy blocks, capacitors, or delivers the receipt of a given deformation of the membrane by reducing energy intensity. This is achieved by the fact that in the center of the axis of symmetry of the system, the inductor-workpiece"is ormatio blanks in 1,5-2 times, and for the same values of the intensity of the deflection of the membrane depends on the applied scheme (Fig. 1, 2, 3) and the electromagnetic properties of the material from which made ferromagnesium. The magnetic circuit of the electrical steel is used to create a magnetic flux and provides higher pressure pulse magnetic field of the inductor on the workpiece, which increases the efficiency of the process.

Thus, the required technical result - obtaining a given deformation of the membrane by reducing energy intensity.

For explanations of the described device is a scheme of the deformation of axisymmetric tubular blanks scheme crimping. Procurement is a ring. The first diagram shown in Fig.1, represents the deformation of the workpiece 2 in a traditional steel coil 1 with the core ferromagnitodinamika 3. The other three schemes are represented using the same inductor 1 using ferromagnitodinamika 3 and 4 different configurations: Fig.2 - closed O-shaped magnetic core; Fig.3 - closed f-shaped magnetic core.

Ferromagnesium is a structure made of several parts (core - inside the inductor and maggotty 2, which asymmetrically relative to the center of the inductor 1; ferromagnitodinamika 3, centering relative to the workpiece 2; ferromagnitodinamika 4, which closes ferromagnesium 3.

Functions of the proposed device is as follows.

Assembled and connected to the magnetic pulse installation of the device increases the intensity of the magnetic field created by the inductor 1 with ferromagnitodinamika 3 and 4, are inserted into the workpiece 2 at the discharge of the capacitor magnetic-impulse installations. Thus ferromagnesium 3 and 4 is magnetized, significantly increasing the intensity of the field inside ferromagnitodinamika 3 and 4, compared with the field outside of ferromagnitodinamika 3 and 4. In the result of the pressure pulse magnetic field will increase, thereby increasing the deformation of the workpiece 2. A significant increase in pulse magnetic field due to the properties of ferromagnitodinamika 3 and 4 allows to reduce the current in the inductor 1, and hence the intensity of the operation while ensuring a given deformation of the workpiece 2. Since the magnetic field is concentrated mainly in ferromagnitodinamika 3 and 4, giving it the appropriate configuration, to concentrate magnitudine, as deformation increases, the performance of the blanks.

Thus, the proposed device allows to increase the efficiency of the process of magnetic-pulse stamping with the same charge energy blocks capacitors and provides a given deformation of the membrane by reducing energy consumption; to increase the deformation of workpieces in 1.5-2 times compared with the traditional scheme of deformation at equal values of stored energy, and also increases the efficiency of the process.

Claims

1. Device for magnetic-pulse forming axisymmetric shells containing a working winding and ferromagnesium, characterized in that ferromagnesium made with the possibility of hosting one of its elements inside the workpiece, and the winding is made with the possibility of placing it outside of the workpiece.

2. The device under item 1, characterized in that ferromagnesium made closed O-shaped.

3. The device under item 1, characterized in that ferromagnesium made a closed f-shaped.

 

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