CN210475529U - Unidirectional compaction platform based on magnetic pulse metal matrix composite - Google Patents
Unidirectional compaction platform based on magnetic pulse metal matrix composite Download PDFInfo
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- CN210475529U CN210475529U CN201921541064.7U CN201921541064U CN210475529U CN 210475529 U CN210475529 U CN 210475529U CN 201921541064 U CN201921541064 U CN 201921541064U CN 210475529 U CN210475529 U CN 210475529U
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Abstract
A unidirectional compaction platform based on magnetic pulse metal matrix composite and a working method are provided. The density of a good sintered product is required to be uniformly distributed in the process of compression molding, but due to the existence of gaps, the physical and mechanical properties of the powder metallurgy product such as density, strength and the like are difficult to reach the level of smelting materials, and although the properties can be improved by hot pressing, re-pressing and other technological means, the densification effect is still poor, and the processing cost is high. The utility model discloses the constitution includes: a power supply device; the driving device comprises a tower type coil, and the tower type coil is fixed on the coil framework through insulating resin; the demoulding device comprises a jack, the upper end of the jack is connected with a force sensor, the force sensor and a small cylinder with the same inner diameter as the compaction mould; the fixing device comprises a base, a guide pillar is arranged on the base and connected with the workbench, and the guide pillar is connected with a fixing bolt. The utility model is used for the metal matrix combined material compaction.
Description
The technical field is as follows:
the utility model relates to a powder metallurgy field, concretely relates to based on one-way compaction platform of magnetic pulse metal matrix combined material and working method.
Background art:
powder metallurgy is a process technique for producing metal materials, composite materials and various products by using metal powder or a mixture of metal powder and nonmetal powder as raw materials and carrying out forming and sintering. Because of the technical advantages of powder metallurgy, it has become a key to solve the problem of new materials, playing a very important role in the development of new materials. The powder metallurgy product far exceeds the category of materials and metallurgy, often spans multidisciplinary technologies, especially modern metal powder 3D printing, integrates mechanical engineering, CAD, reverse engineering technology, layered manufacturing technology, numerical control technology, material science and laser technology, and enables the powder metallurgy product technology to become a modern comprehensive technology spanning more disciplines.
At present, the rapid development of science and technology, the composite materials with ultrahigh hardness and strength are continuously emerging, and powder metallurgy is a main method for preparing working materials such as high-performance structural materials, novel metal ceramics, special functional materials and the like. In order to obtain a good sintered product, the density must be uniformly distributed in the process of compression molding, but due to the existence of voids, the physical and mechanical properties of the powder metallurgy product, such as density, strength and the like, are difficult to reach the level of smelting materials, although the properties can be improved by hot pressing, re-pressing and other technological means, the densification effect is still poor, the processing cost is high, and thus the electromagnetic forming with high energy rate and strong impact load becomes one of the hot spots of powder metallurgy research.
The new high-energy-rate forming process is characterized by that when the electromagnetic pressing is used in electromagnetic forming, the strong pulse electromagnetic force is used to act on the powder body to make it be densified. Originally, the university of manchester, england introduced the idea of electromagnetic compaction into powder compaction, which employed direct discharge compaction, i.e. without a coil, the storage capacitor bank discharged directly into the powder mass, and the instantaneous release of electrical energy broke down the oxide layer on the surface of the metal powder particles, forming metal bonds between the metal ions, while the powder mass contracted in the radial direction under the "converging effect" of the electromagnetic field, compacting it. And successfully processing long bar stocks, strip stocks and other powder products with complex shapes.
The electromagnetic forming process is a new high-energy-rate forming technology, and is a forming method which uses an instant high-voltage pulse magnetic field to force a blank to be formed at a high speed under the action of impact electromagnetic force. The electromagnetic forming eliminates the danger of explosion forming, and is more convenient than electro-hydraulic forming.
The utility model has the following contents:
the utility model aims at providing a based on one-way compaction platform of magnetic pulse metal matrix combined material and working method.
The above purpose is realized by the following technical scheme:
a one-way compaction platform based on magnetic pulse metal matrix composite includes:
a power supply device;
the driving device comprises a tower coil, the tower coil is fixed on a coil framework through insulating resin, a driving sheet is arranged between the insulating resin and the tower coil, the coil framework is connected with an amplifier, the amplifier is connected with a punch, and the head end and the tail end of the tower coil are respectively connected with a binding post A and a binding post B of the power supply device through copper wires;
the upper end and the lower end of the interior of the sleeve are respectively provided with an upper small cylinder and a lower small cylinder;
the demoulding device comprises a jack, the upper end of the jack is connected with a force sensor, and the force sensor and the small cylinder with the same inner diameter as the compaction mould;
the fixing device comprises a base, a guide pillar is arranged on the base and connected with a workbench, the guide pillar is connected with a fixing bolt, a groove for placing a compaction die is formed in the workbench, the compaction die is fixed on the workbench through a die fixing device, an end cover is connected with the driving device through a resin plate, and the fixing bolt fixes the whole driving device on the top of the rack through the resin plate.
The unidirectional compaction platform based on the magnetic pulse metal matrix composite material comprises a high-voltage transformer, a charging resistor, a high-voltage rectifier and a capacitor.
The unidirectional compaction platform based on the magnetic pulse metal matrix composite material and the pressure sensor are in contact with the bottom of the compaction mould.
Has the advantages that:
the utility model discloses the usable discharge energy of pressure is controlled, avoids repeated suppression, and its suppression time is short, and is fast, efficient. It has low noise and high safety.
The utility model discloses can obtain the blank of high density, the shrinkage factor is little after the sintering, can reduce size error.
The utility model discloses be fit for the blank of the symmetrical shape of suppression cylinder class, can provide convenience for the drawing of patterns after the suppression work ends, improved whole work efficiency.
The utility model discloses the device is opened on the workstation has the recess that equals with the mould external diameter, places the embossing mold utensil in the recess to be provided with the device of fixed mould above the mould, prevent that suppression and drawing of patterns in-process mould from removing, guaranteed the security of powder forming working process.
The utility model discloses power supply unit and drive arrangement adopt electromagnetic forming, and replace traditional flat coil for tower coil in drive arrangement, compare in flat coil and other form coils, can produce bigger pulsed magnetic field in the circular telegram process, because electromagnetic induction's law, make the drive plate produce eddy current, thereby produce magnetic field, two magnetic fields repel each other and produce the eddy current repulsion, amplify this repulsion through stress wave amplifier, drive the drift fixed with it and move downwards, impact the powder at a high speed, make the powder compaction; secondly, this device design has shedder, after the powder compaction, carries out drawing of patterns processing with the powder compact that presses, and the design has dynamic pressure sensor, can gather in the pressing process and obtain the clamping force.
Description of the drawings:
fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a top view of fig. 1.
Fig. 3 is a schematic structural diagram of the power device of the present invention.
Fig. 4 is a top view of fig. 3.
Fig. 5 is a cross-sectional view of fig. 3.
Fig. 6 is a schematic structural diagram of the sleeve of the present invention.
Fig. 7 is a top view of fig. 6.
Fig. 8 is a schematic structural diagram of the pressure sensor of the present invention.
Fig. 9 is a top view of fig. 8.
Fig. 10 is a schematic structural diagram of the compacting die of the present invention after loading powder.
The specific implementation mode is as follows:
in order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Example 1:
the utility model provides an one-way compaction platform based on magnetic pulse metal matrix combined material, the utility model discloses the technical scheme who takes provides one-way powder compaction platform based on magnetic pulse metal matrix combined material, including power supply unit, drive arrangement, compaction mould 8, fixing device, shedder.
A power supply device: high-voltage transformer, charging resistor, high-voltage rectifier, condenser.
A driving device: the coil frame 1, the tower coil 2, the driving sheet 3, the insulating resin 4, the amplifier 5, the punch 6 and the copper wires 22 are fixed on the frame by the insulating resin 4, the two copper wires are respectively connected with the head and the tail of the tower coil and are fixed together by screws, and outside the leading-out device, the two copper wires are respectively connected with a binding post A and a binding post B of a power supply device during working.
Compacting the mold: comprises a sleeve 12 with the height of 60mm, the inner diameter of 20mm and the outer diameter of 50mm, two upper small cylinders 20 with the diameter of 20mm and the height of 20mm, and a lower small cylinder 21.
A demoulding device: a jack 11, a force sensor 10, and a small cylinder with the same inner diameter as the mold. The force sensor can measure the pressure in real time, the measuring range is 200t and 250t, the sensitivity is 2.0 plus (-) 0.0050, when the powder is compacted, the small cylinder is placed on the force sensor, the force sensor is jacked upwards through the jack, and the small ball acts on the die to carry out the demoulding treatment.
A fixing device: the base 19, the end cover 18, fixing bolt, guide pillar 24, workstation 9, the workstation is last to be fluted for place compaction mould, there is mould fixing device 7 compaction mould top, fixes the compaction mould on workstation 9, connects with resin sheet 23 between drive arrangement and whole device top, will fix whole drive arrangement at the rack top through resin sheet 23 with fixing bolt.
Example 2:
the utility model provides an one-way compaction platform based on magnetic pulse metal matrix combined material, after connecting power supply unit, with two copper line connections of drawing forth in the tower coil from among the drive arrangement, form closed discharge circuit.
The coil designed by the driving device is a tower coil, and is characterized in that compared with a flat coil and other coils, when impact current flows through the tower coil, a stronger pulse magnetic field is generated than the flat coil, the strong pulse magnetic field generated in the tower coil is restrained in a narrow slit by a driving sheet with the same shape and size as the tower coil to form a magnetic field, under the action of the magnetic field, due to the electromagnetic induction rule, the driving sheet generates an eddy magnetic field, eddy repulsion force is generated between the two magnetic fields, the eddy repulsion force is continuously reflected and projected in a stress wave amplifier, and an amplified force drives a punch to act on a die to press powder.
A pressure sensor is designed below the workbench and is in contact with the bottom of the die, and the pressure sensor can be used for measuring the change of the force applied to the die in the pressing process.
The pressure sensor is in contact with the bottom of the compaction die, the measuring range is 200t and 250t, the sensitivity is 2.0 plus and minus 0.0050, and the pressure sensor in contact with the die below the workbench measures the magnitude of the pressing force applied in the process of pressing the powder.
The lifting jack is arranged and has the function of adjusting the height of the workbench, if the workbench is too low, the nut for fixing the stud is loosened, the workbench is jacked to a proper working position along the guide column by the lifting jack, and then the nut is screwed down. And secondly, demoulding, namely ejecting the pressed blank in the die by using a jack after the powder is pressed, and demoulding.
Example 2:
the utility model provides a magnetic pulse metal matrix composite material-based unidirectional compaction platform, a working method of the magnetic pulse metal matrix composite material-based unidirectional compaction platform,
step 1: fixing a mould in a groove of a workbench, placing a lower small cylinder in the mould, then loading powder, and after powder loading is finished, placing an upper small cylinder in a compaction mould;
step 2: connecting a power supply device, and connecting two copper wires led out from the power supply device with two binding posts of the power supply device respectively to form a whole discharge circuit; closing the high-voltage switch to discharge, forming pulse current in a discharge loop after the power supply device discharges, generating eddy repulsion force between the two magnetic fields due to electromagnetic induction when the pulse current passes through the tower coil, and driving the punch to act on the upper small cylinder by the amplified force after the eddy repulsion force is continuously reflected and projected in the stress wave amplifier so as to instantly compact the powder in the compaction die;
and step 3: after compaction is finished, a circuit power supply is cut off, a high-voltage switch is disconnected, a small cylinder is placed on the pressure sensor in alignment with the powder loading position of the compaction die, and the pressure sensor is jacked by a jack, so that the small cylinder on the pressure sensor can eject a powder compact in the die.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (3)
1. The utility model provides a based on one-way compaction platform of magnetic pulse metal matrix combined material which characterized by: the method comprises the following steps:
a power supply device;
the driving device comprises a tower coil, the tower coil is fixed on a coil framework through insulating resin, a driving sheet is arranged between the insulating resin and the tower coil, the coil framework is connected with an amplifier, the amplifier is connected with a punch, and the head end and the tail end of the tower coil are respectively connected with a binding post A and a binding post B of the power supply device through copper wires;
the upper end and the lower end of the interior of the sleeve are respectively provided with an upper small cylinder and a lower small cylinder;
the demoulding device comprises a jack, the upper end of the jack is connected with a force sensor, and the force sensor and the small cylinder with the same inner diameter as the compaction mould;
the fixing device comprises a base, a guide pillar is arranged on the base and connected with a workbench, the guide pillar is connected with a fixing bolt, a groove for placing a compaction die is formed in the workbench, the compaction die is fixed on the workbench through a die fixing device, an end cover is connected with the driving device through a resin plate, and the fixing bolt fixes the whole driving device on the top of the rack through the resin plate.
2. The unidirectional compaction platform based on magnetic pulse metal matrix composites as claimed in claim 1, wherein: the power supply device comprises a high-voltage transformer, a charging resistor, a high-voltage rectifier and a capacitor.
3. The unidirectional compaction platform based on magnetic pulse metal matrix composites as claimed in claim 1, wherein: the pressure sensor is in contact with the bottom of the compaction tool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201921541064.7U CN210475529U (en) | 2019-09-17 | 2019-09-17 | Unidirectional compaction platform based on magnetic pulse metal matrix composite |
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| CN201921541064.7U CN210475529U (en) | 2019-09-17 | 2019-09-17 | Unidirectional compaction platform based on magnetic pulse metal matrix composite |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112077304A (en) * | 2020-09-09 | 2020-12-15 | 湖南大学 | Semi-automatic magnetic pulse warm-pressing device based on metal matrix composite |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112077304A (en) * | 2020-09-09 | 2020-12-15 | 湖南大学 | Semi-automatic magnetic pulse warm-pressing device based on metal matrix composite |
| CN112077304B (en) * | 2020-09-09 | 2021-11-16 | 湖南大学 | Semi-automatic magnetic pulse warm-pressing device based on metal matrix composite |
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