Electro-plastic open die forging device and method

An electroplasticity and brush device technology, which is applied in the field of forging, can solve the problems of hindering dislocation movement, reducing strength and hardness, and poor uniformity of annealing, so as to ensure uniformity and reduce plastic deformation resistance.

Inactive Publication Date: 2014-02-19
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For those materials with poor plasticity, heat treatment is generally carried out, but this method faces some problems, because the nature of some materials determines that they are not suitable for heat treatment. While the strength and hardness are improved, the strength and hardness are obviously reduced, and the heat treatment may cause poor uniformity of annealing, long heating time, and relatively large energy consumption
[0003] According to the microscopic mechanism of metal plastic deformation, the essence of plastic deformation is the generation and movement of a large number of dislocations. Due to the movement and interaction of dislocations, entanglement of dislocations and dislocations will be generated during plastic deformation. Phase and crystal defect reaction and other phenomena, thus hindering the movement of dislocations, forming work hardening, making it difficult to continue plastic deformation

Method used

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  • Electro-plastic open die forging device and method
  • Electro-plastic open die forging device and method

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Such as figure 1 As shown, the present embodiment includes: an upper anvil 1, a lower anvil 2, a pulse power supply 3, a driving device 4, a brush device 5, a blank 6 and a control device 7, wherein: the lower anvil 2 is the same as the upper anvil 1 in width, It is larger than the upper cutting board 1 in length, which is equivalent to a large platform. The movable brush device 5 works on the lower cutting board 2. The pulse power supply 3 is connected with the brush device 5. The driving device 4 drives the brush 5 to reciprocate. The device 5 is placed symmetrically with respect to the blank 6 during the electrification process, and the control device 7 controls the time when the brush device 5 contacts the blank 6 and leaves the blank 6 by detecting the position of the upper anvil 1 according to preset parameters.

[0025] The billet to be processed in this embodiment is a billet made of HRB335, and its specification is 150×150×3000mm. The process parameters of the ...

Embodiment 2

[0028] The blank to be processed in this embodiment is a rectangular blank made of Q235, and its specification is 180×275×5000mm. The process parameters of the continuous pulse power output pulse current are: peak current 7500A, frequency 300HZ, pulse width 60μs, duty cycle 10 %.

[0029] This embodiment is the same as other implementations of Embodiment 1.

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Abstract

An electro-plastic open die forging device comprises an electric brush device, a driving device and a control device, wherein the electric brush device is connected with a pulse power supply, and the control device is capable of controlling the driving device to drive the electric brush device to be contacted with or separated from blank. The control device controls the time of the electric brush device for being contacted with or separated from the blank based on the position of an upper chopping board. Therefore, when the blank is forged, under the control of the control device, the driving device drives the electric brush device to be contacted with the blank, and transverse continuous electric pulses are led to the blank. The invention further provides an electro-plastic open die forging method. The device and the method improve forming property by utilizing electro-plastic effect of metal during an open die forging process.

Description

technical field [0001] The invention relates to the technical field of forging, in particular to an electroplastic free forging device. Background technique [0002] Free forging is a processing method that uses impact force or pressure to freely deform metal in all directions between the upper and lower anvil surfaces, without any restrictions, to obtain forgings of required shape and size and certain mechanical properties. For those materials with poor plasticity, heat treatment is generally carried out, but this method faces some problems, because the nature of some materials determines that they are not suitable for heat treatment. While improving, the strength and hardness are obviously reduced, and the heat treatment may cause poor uniformity of annealing, long heating time, and relatively large energy consumption. [0003] According to the microscopic mechanism of metal plastic deformation, the essence of plastic deformation is the generation and movement of a large ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21J9/20
Inventor 沈耀马佳伟李奥吕智金学军
Owner SHANGHAI JIAOTONG UNIV
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