High-speed impact pressing method for metal powder

A metal powder and high-speed impact technology, which is applied in the field of high-speed impact pressing of metal powder, can solve the problems of difficult energy control and poor safety, and achieve the effects of small energy loss, short pressing time, and reduced sintering shrinkage

Inactive Publication Date: 2012-09-05
NINGBO UNIV
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Problems solved by technology

Among them, the use of high-speed impact to press powder is a forming method for powder materials that can not only make the powder well compacted, but also maintain its original grain size and characteristics. The current high-speed impact forming method is used more What is more is explosive forming, but it has disadvantages such as poor safety and difficult energy control.

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  • High-speed impact pressing method for metal powder
  • High-speed impact pressing method for metal powder

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Embodiment Construction

[0013] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0014] A high-speed impact pressing method for metal powder, comprising the following steps:

[0015] (1), a mold 2 made of a non-magnetic material is arranged on the substrate 1, and a cavity is set on the mold 2;

[0016] (2), the tower-shaped coil 3 is fixed on the top of the mold 2 in such a way that the top is wide and the bottom is narrow. overlap;

[0017] (3), current-limiting resistor 4, high-voltage energy storage capacitor 5 and three-electrode switch 6 are connected in series to form a discharge circuit, then the discharge circuit is connected in series on the tower coil 3, and the discharge high voltage of the discharge circuit is set to be Above DC2KV;

[0018] (4) Fill the metal powder 7 in the mold cavity of the mold 2, then discharge the tower coil 3, and the pulsed magnetic field generated by the tower coil 3 directly acts...

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Abstract

The invention discloses a high-speed impact pressing method for metal powder, which is characterized in that a die is arranged on a substrate first, a cavity is arranged on the die, a tower-shaped coil is fixed above the die, the tower-shaped coil is electrically connected with a discharge circuit, metal powder is filled in the cavity of the die, discharge processing is conducted to the tower-shaped coil, a pulsed magnetic field produced by the tower-shaped coil directly acts on the metal powder and the metal powder is pressed and formed. The invention has the advantages that the loading of impact stress waves to the metal powder is realized by using the action of electromagnetic force, the instant repetitive bidirectional compaction of the metal powder is realized by using the oscillation characteristics of the stress waves, the density of the pressed metal powder is high, the pressing time is short, the friction of the metal powder during pressing is reduced, the density distribution of the metal powder is even, the sintering shrinkage rate is reduced and the precision and the performance of parts are improved.

Description

technical field [0001] The invention relates to a pressing method of powder, in particular to a high-speed impact pressing method of metal powder. Background technique [0002] Powder compression molding technology is an advanced manufacturing technology for mechanical parts, which has the advantages of high efficiency, high quality, precision, and low energy consumption, and is suitable for mass production of parts. Among them, the use of high-speed impact to press powder is a forming method for powder materials that can not only make the powder well compacted, but also maintain its original grain size and characteristics. The current high-speed impact forming method is used more What is more is explosive forming, but it has disadvantages such as poor safety and difficult energy control. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a high-speed impact pressing method of metal powder with good safety, stable ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/087
Inventor 刘军周刚毅董新龙李国富
Owner NINGBO UNIV
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