The inductor for magnetic pulse processing
(57) Abstract:The invention relates to the field of metal forming and can be used in sheet metal forming operations when the magnetic pulse forming flat parts. The inductor includes a flat conductor coil with a gap between the coils and the hole formed by the Central coil. The coils forming the Central zone has a height exceeding the height of the remaining coils. They form a protruding portion of the spiral from the side of the outside edge of the inductor. In the inductor has two closed loop of electrically conductive material and one closed loop of electrically conductive material with a high conductivity, the axis of which is offset from the axis of the inductor. One of the two mentioned short-circuited coils covers the protruding portion of the turns of the Central zone of the spiral, and the second of its peripheral level. On the inductor side of the formed parts installed cover of a nonmagnetic material with holes located in the area of the closed loop. Last mounted on the lid between the inductor and workpiece. The result is the expansion of the functionality of the inductor and increasing its mechanicalthe in sheet metal forming operations when the magnetic pulse forming flat parts.A device for electromagnetic correct dents in conductive materials (patent USSR N 728695, CL 21 D 26/14, 1980) containing supplied to the dent of the working cylinder with the coil inductance, the first source for supplying the working head slowly increasing voltage, the second source to feed her fast-rising current of lesser amplitude and opposite polarity, and the control system serial supply current.Also known cylindrical inductor for magnetic pulse processing sheet parts (patent USSR N 772470, class B 21 D 26/14, 1980), having end working surface and formed of a cylindrical conductive spiral with turn-to-turn insulation.The disadvantage of this device is the design complexity.In addition, the known inductor for magnetic treatment items (USSR author's certificate N 969373, class B 21 D 26/14, 1982), made in the form of a flat spiral of electrically conductive strips, large side which is perpendicular to the plane of the spiral, and the spiral coils are arranged with a gap from each other.Closest to the proposed invention the technical essence is the inductor for magnetoimpuls is authorized by the Central coil (USSR author's certificate N 405630, B 21 D 26/14, 1974).However, in a known inducer a problem occurs with the formation of parts from materials with low electrical conductivity. This increases the complexity of the formation of the items.In addition, the inductor has insufficient mechanical strength.The task, which is aimed by the invention, is to expand the functionality of the inductor due to the increase of magnetic effects in the treatment area and increase its mechanical strength due to the hanging of the magnetic induction in the Central zone.Left the task is achieved by the fact that the inductor for magnetic pulse processing, containing a flat conductor coil with a gap between the coils and the hole formed by the Central coil, fitted with two short-circuited turns of electrically conductive material, a cap of non-magnetic material mounted on the inductor side of the formed part and is made with holes and secured to the cover between the inductor and forming part third closed loop of electrically conductive material with a high conductivity, the axis of which is offset from the axis of the inductor, thus, turns centrala part of the spiral, located from the side of the outside end of the inductor, one of the two mentioned short-circuited coils covers the protruding portion of the turns of the Central zone of the spiral, the second of its peripheral coil and cap holes are located in the area of the third closed loop.The essence of the inductor is illustrated by a drawing. In Fig. 1, the inductor shown in section, Fig. 2 is a view of the inductor from the bottom.Conductive helix with six coils 1-6 and clearances 7 - 11 between them has outputs 12 and the Central hole 13. Protruding coils 1 and 2, forming the Central hole 13, comprises a closed loop 14. End of the outer coil 6 comprises a closed loop 15. All the device is in the brace 16. To the bottom of the coil cover 17 of non-magnetic material, onto which the sleeve 18, which is the third closed loop 19 of electrically conductive material with a high conductivity, the fastening of the third closed loop is anti-squeak plate 20. Item 21 is placed with a gap 22 relative to the pressure plate 20.The inductor operates as follows.Through the coils 1-6 conductive spiral skipped the pulse current of the dummy parts 21 and in the third closed loop 19. The interaction of pulsed magnetic fields in spiral with a third closed loop 19 and the parts 21 leads to the formation of the latter. At the same time, a pulse magnetic field of the helix induces eddy currents in the shorted coils 14 and 15, and the resulting magnetic field is short-circuited turns, interacting with the pitch of the helix causes the area nepostanovku the formed part, the phenomenon compressive loads acting in the direction of the Central hole 13, which leads to compaction of the coils of the helix, and ultimately to increase the resistance of the inductor.As a result of increase of the magnetic induction in the Central area on the working surface of the inductor is reduced zone nepostanovku in formed parts. The inductor for magnetic pulse processing, containing a flat conductor coil with a gap between the coils and the hole formed by the Central coil, characterized in that it has two short-circuited turns of electrically conductive material, a cap of non-magnetic material mounted on the inductor side of the formed part and is made with holes and secured to the cover between the inductor and forming part third cage Vitko the ri this turns the Central zone of the conductive spiral is made high, exceeding the height of the other coils, with the formation of the protruding part of the helix that is located from the side of the outside end of the inductor, one of the two mentioned short-circuited coils covers the protruding portion of the turns of the Central zone of the spiral, the second of its peripheral coil and cap holes are located in the area of the third closed loop.
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