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Aluminum alloy thin plate precision shaping method and device based on electro-hydraulic forming

An electro-hydraulic forming and precision shaping technology, applied in forming tools, metal processing equipment, manufacturing tools, etc., can solve problems such as not being well solved, and achieve the effects of simplified structure, simple device and low cost

Inactive Publication Date: 2020-09-01
BEIJING RES INST OF MECHANICAL&ELECTRICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still many key technical problems in the application of high-speed forming in large deformation of materials that have n

Method used

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  • Aluminum alloy thin plate precision shaping method and device based on electro-hydraulic forming
  • Aluminum alloy thin plate precision shaping method and device based on electro-hydraulic forming
  • Aluminum alloy thin plate precision shaping method and device based on electro-hydraulic forming

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Experimental program
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Effect test

Embodiment 1

[0045] Such as figure 1As shown, the aluminum alloy sheet precision shaping device based on electro-hydraulic forming provided by the present invention includes: a punch liquid chamber 1, a shaping die 2, an electrode 4, a metal foil 5 and a high-voltage pulse generator;

[0046] The above-mentioned punch liquid chamber 1 can be filled with water medium 6 as a force transmission medium for electro-hydraulic forming;

[0047] The high-voltage pulse generator is composed of a discharge switch 7, a current limiting resistor 8, a rectifying element 9, a capacitor bank 10, and a step-up transformer 11;

[0048] Wherein the step-up transformer 11 is connected to an external voltage, and the positive electrode of the step-up transformer 11 is connected in series with a rectifying element 9, a current limiting resistor 8 and a discharge switch 7. The negative electrode of the voltage transformer 11 is connected to the negative electrode of the above-mentioned electrode 4 and is locat...

Embodiment 2

[0061] Consistent with the principle of the first embodiment above, the present invention also provides a second embodiment, by connecting two metal wires with different resistances in parallel between the positive and negative electrodes of the electrode 4 in the way of explosive wires, wherein, different materials can be selected Or metal wires of different lengths or different thicknesses to achieve the purpose of different resistances. By controlling the voltage of the high-voltage pulse generator to gradually increase the discharge, due to the difference in the resistance of the metal wires, two vaporizations and explosions will occur in a very short time. , and through the shock waves generated by the two vaporization explosions, the local unmolded parts of the aluminum alloy preform undergo high-speed deformation in a very short period of time and adhere to the concave mold cavity for shaping, and complete the precision of the local small features of the aluminum alloy sh...

Embodiment 3

[0064] Embodiment 1 and Embodiment 2 provided by the present invention are based on the wire explosive electro-hydraulic forming method for precise shaping of aluminum alloy sheets. In practical applications, the electro-hydraulic precision shaping method for aluminum alloy thin Gap discharge electrohydraulic forming of metal foils, such as figure 2 The schematic diagram of the assembly of the preform and the mold before shaping based on the gap discharge electro-hydraulic forming method is shown. The device used includes the punch liquid chamber 1, the shaping die 2, the electrode 4, and the high-voltage pulse generator. The high-voltage pulse generator It is composed of a discharge switch 7, a current limiting resistor 8, a rectifier element 9, a capacitor group 10, and a step-up transformer 11. It is different from the device based on the wire explosion electro-hydraulic forming method in the first embodiment. The difference of this embodiment is that the positive electrode...

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Abstract

The invention provides an aluminum alloy thin plate precision shaping method based on electro-hydraulic forming. The method comprises the following steps: A, preparing a tool; B, clamping a workpiece;C, filling a electro-hydraulic forming medium; D, vacuumizing a part to be shaped; and E, carry out aluminum alloy part electrohydraulic precision shaping. According to the method, a preformed part can be accomplished by process methods such as liquid-filling forming or traditional stamping, most shape features of the preformed part conform to the final forming requirement, and a few local smallfeatures and small rounded corners are difficult to complete by the process methods such as the liquid filling forming or the traditional stamping and needs to be completed by an electro-hydraulic precision shaping method; and the aluminum alloy preformed part is placed on a specific shaping die, and the principle that the electro-hydraulic medium instantaneously expands and generates shock wave under the condition of high pressure pulse is utilized, so that the local small features of an aluminum alloy thin plate are precisely shaped.

Description

technical field [0001] The patent of the present invention relates to the field of precision forming of aluminum alloy sheets, more specifically, to a method and device for precise shaping of aluminum alloy sheets based on electro-hydraulic forming. Background technique [0002] As an important lightweight material, aluminum alloy has been widely used in many important industrial fields such as automobiles, aviation, and military affairs. Although aluminum alloy materials have the characteristics of high strength, light weight, high efficiency and superior performance, there are still problems such as narrow plastic deformation range, high forming pressure, and large springback. When small features such as grooves or sharp edges and corners are used, it is easy to cause excessive thinning or cracking of the sheet. In order to ensure that the sheet is not excessively thinned, the cold stamping process requires multiple forming and shaping processes. In addition, the cold sta...

Claims

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Application Information

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IPC IPC(8): B21D26/10B21D37/10
CPCB21D26/10B21D37/10
Inventor 朱卫东刘桂华翟月雯陆辛金红郝国建邱德花
Owner BEIJING RES INST OF MECHANICAL&ELECTRICAL TECH
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