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.
Claims1. 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.
FIELD: plastic working of metals.
SUBSTANCE: method comprises steps of deforming sheet blank by drawing it through closed working gage of draw plate; using linear electric motor at making shapes. In order to draw blank through closed working gage of draw plate at smoothly deforming it, pulling effort uniformly distributed along the whole length of deformation zone is provided. Said pulling effort is created due to interaction of traveling magnetic field induced in winding of stator of linear electric motor with eddy currents induced in blank for moving blank according to traveling magnetic field. Apparatus for making shapes of sheet blank includes draw plate with closed working gage. Apparatus for making shapes of electrically conducting material includes linear electric motor supporting draw plate with closed working gage; the last is fixed to said motor. It is possible to use as linear electric motor single-side linear electric motor, double-side linear electric motor or cylindrical linear electric motor.
EFFECT: enlarged manufacturing possibilities, enhanced quality of shapes.
5 cl, 6 dwg
FIELD: machine engineering, namely joining of constructional members of articles, for example flexible members and tips.
SUBSTANCE: method comprises steps of changing shape and size at least of one of joined members at using forces of interaction of electromagnetic fields of electric currents to be passed through electric current lead. Shape and size of joined members are changed due to moving movable members of shaping tool by action of forces caused at direct interaction of electromagnetic fields of electric currents. On portions of electric current lead turned to movable members of shaping tool electric current are passed in one direction while moving said portions together with movable members of tool. On portions of electric current lead remote from movable members electric currents are passed in opposite direction and motion of said portions is limited by means of restriction members.
EFFECT: enhanced efficiency of process, lowered energy consumption of used equipment.
FIELD: manufacturing equipment for plastic working of cylindrical blanks with use of magnetic devices.
SUBSTANCE: inductor includes set of electrically connected in series metallic discs having insulated layers and radial cutout from inner opening till periphery. Radial cutout is in the form of sector with angle 120°. Each metallic disc has insulated layer only at one side and along its end surfaces and it engages by its non-insulated surface with non-insulated side of adjacent metallic disc on surface of sector with angle 120° for forming helix of double layer of metallic discs at their preliminary axial compression.
EFFECT: enhanced strength of inductor at the same thickness values of metallic discs and insulation.
FIELD: metallurgical industry branch, possibly magnetic-pulse crimping of elongated tubular blanks or tubular blanks with thickened end portions.
SUBSTANCE: inductor is in the form of pack of flat plates coated with insulation. Said plates are arranged in pairs in mutually parallel planes, they are turned one relative to other by angle 90° and they have zone free from insulation on both sides of plate and symmetrical relative to cutout formed on one side of plate. Cutout of each plate corresponds to diameter of worked tubular blank; said plates are electrically connected in series to three-dimensional helix.
EFFECT: lowered energy consumption, enlarged manufacturing possibilities.
SUBSTANCE: invention relates to physics of superstrong pulsed magnetic fields, pressure of which can be used for studying properties of substances compressed with pulsed pressure and obtaining substances with new properties. The device for compressing substance has a source of pulsed magnetic field 1 with an explosive charge 3 and at least one sample of substance. On the axis of the device there is a current conducting rod 3 with channels 4 for placing samples, where at the centre of the rod there an annular constriction 5, formed by cones, whose peaks face each other. The length of the annular constriction is equal to the diametre of the rod. The wall above the channel in the rod where the sample is located has thickness which is greater than thickness of the skin layer, and the length of the rod is greater than the length of the explosive charge.
EFFECT: provision for directed movement of the sample along the axis, which enables determination of place of installation of sample catchers and so preserving the sample after removing the load.
4 cl, 3 dwg
FIELD: process engineering.
SUBSTANCE: invention relates to machine building and can be used in producing shell structures with curvilinear work surfaces. Flat thin-wall preform is pressed towards shaping surface of detachable tool. Note here that, simultaneously, curvilinear section with curvilinear work surfaces are formed along with two-layer shaped stiffness ribs jointing the latter together that are produced from preform fragments not involved in forming curvilinear sections of the shell. Shell thickness is made equal to that of preform, while detachable lower die is removed through open zone on the shell extreme edge side.
EFFECT: higher accuracy of shells and efficiency of their production.
6 cl, 16 dwg
FIELD: process engineering.
SUBSTANCE: invention relates to machine building and may be used for magnetic pulse processing. Electrically conducting coil is produced made up of a set of plates. Each plate has current conducting section, central hole and radial slot. Radial slots of adjacent plates are turned through preset angle around the central hole axis. Said current conducting sections are electrically interconnected, said adjacent sections being located on different sides of radial slots. Set of plates is made from single blank wherein plates and jumps shapes are formed to produce current conductor. Conditional line of currents of said conductor envelopes, zigzag-like, the central hole of each said plate on the side opposite the radial slot. Now, the blank is bent at jump point along bending lines, equidistant from central hole axis to allow adjacent plates to contact in contact and their central axes to be aligned. Note here that contingent surfaces of adjacent plates are electrically isolated so that their inner and outer edges are overlapped. Note also that the plates are mechanically jointed together while radial slots are filled with insulating material.
EFFECT: expanded performances.
FIELD: process engineering.
SUBSTANCE: invention relates to powder metallurgy. Proposed flat inductor consists of inductor spiral representing Archimedes spiral, casing, interturn insulation and current leads to connect inductor to power supply. Zero and potential current leads are made up of rods with cylindrical bulge provided with groove receiving inductor bus that features double thickness and depth equal to bus height. Grooves in cylindrical bulge form transition from current lead to spiral turn made along tangential line in current lead/bus contact zone. Inductor bus permanently connected with current leads features double thickness, smoothly reducing to single thickness at the distance of, at least, current lead cylindrical section diametre.
EFFECT: longer life at discharge high powers.
2 dwg, 1 ex
SUBSTANCE: invention refers to the field of metal treatment under the pressure and, particularly, to the technological equipment of cylindrical works pressure treatment using magnet devices. Inductor consists in the set of metal discs connected in series with insulating layers. Metal discs have radial section from inner hole to the edge. Each disc is equipped with connection terminals located radially at the both sides of radial section outside the disc along its axis divided into the angle the value of which is set according to the number of metal discs connected with each other by turn of one respectively the other at the mentioned angle and respective fixation of two matching connection terminals until their location one above other.
EFFECT: minimal spray inductance, compactness and easy further connection to terminals of magnetic-impulse plant.
1 dwg, 4 dwg
FIELD: process engineering.
SUBSTANCE: invention relates to metal forming using magnetic appliances. Conductive coil is shaped to solid flat blank with conductive plate paths. Holes and grooves are made in every plate between path and central bore to make arbitrary current lines extending over all plate contour. Extreme conductive plates are furnished with connection terminals arranged in parallel while adjacent plates are connected via jumpers to make current distributor. Said jumpers are bent radially at points equidistant from aligned axes of central holes. Then, conductive plate surfaces are electrically isolated so that their internal and external contours overlap and clamped to contact. Proposed appliance comprises foot to support board with recesses for fitting conductive plate, bending mechanism made up of ledge coupled with lever and articulated with foot strut, and cylindrical pin arranged in plate bending zone that has axis aligned with hinge axis and perpendicular to lever axis and diameter that allows jumper radial bending.
EFFECT: expanded performances.
2 cl, 2 dwg