A large-size sheet metal local electromagnetic deep drawing hole turning forming method and forming device

A technology of large size and sheet material, which is applied in the field of local electromagnetic deep drawing and turning hole forming method and forming device for large size sheet material, can solve the problem of large discharge equipment energy and coil size, difficulty in turning hole forming, and change of sheet diameter size. And other issues

Active Publication Date: 2020-10-27
CENT SOUTH UNIV
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this technology has the following problems: (1) The coil is set at the end of the sheet to push the flange material of the sheet into the hole of the die, which will lead to a change in the overall diameter of the sheet
The side push coil at the end needs to push the entire flange material to the die hole, the required energy of the discharge equipment and the size of the coil are extremely large, and it is extremely difficult to form the hole

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A large-size sheet metal local electromagnetic deep drawing hole turning forming method and forming device
  • A large-size sheet metal local electromagnetic deep drawing hole turning forming method and forming device
  • A large-size sheet metal local electromagnetic deep drawing hole turning forming method and forming device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Figure 2 to Figure 6 It shows the first embodiment of the large-size sheet metal local electromagnetic deep-drawing and hole-turning forming device of the present invention, including the die 6 and the friction thrust group 4 arranged above the die 6, the friction thrust group 4 and the die 6 A translation path 2 is formed between them, a flanging path 3 communicating with the translation path 2 is provided on the die 6, a high-temperature zone 5 is set below the translation path 2 on the die 6, and friction thrust groups 4 are provided on the side for frictional thrust. Group 4 is a radial side pushing coil 7 for applying a radial electromagnetic force, and an axial drawing coil 8 for applying an axial electromagnetic force to the sheet 1 is arranged above the flanging path 3 . The magnetic pulse flanging technology is adopted, which can significantly improve the forming limit of the part; the local heating of the sheet 1 improves the local plastic deformation capacit...

Embodiment 2

[0064] Such as Figure 7 to Figure 10 As shown, the second embodiment of the large-size sheet metal local electromagnetic deep-drawing and hole-turning forming device of the present invention is basically the same as the embodiment 1, the only difference is: in this embodiment, the high-conductivity block 42 and the friction body 43 constitutes a split structure as a whole, and each split structure is arranged at an even interval. The high conductance block 42 and the friction body 43 are split-lobe structures. When the radial side push coil 7 discharges, the high conductance block 42 does not deform, and the high conductance block 42 and the friction body 43 provide more friction, so the deformation resistance is small , the required equipment energy and coil size are small, but the deformation uniformity of the sheet 1 is slightly poor, and it is necessary to deform and rotate the high-conductance block several times to improve the deformation uniformity.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a large-size plate local electromagnetic deep-drawing hole flanging forming method and device. The method includes the steps that S1, a translation path and a flanging path areset; S2, a friction thrust set and a high-temperature region are set; S3, a plate is arranged on the translation path and covers the flanging path; S4, heating of the high-temperature region runs; S5,the friction thrust set is pressed to be tightly attached to the plate; S6, radial electromagnetic force is applied to the friction thrust set to enable the plate to be extruded towards the flangingpath, and meanwhile axial electromagnetic force is applied to the plate above the flanging path to enable the plate to be drawn towards the flanging path; and S7, the bottom of the drawing region of the plate is punched, axial electromagnetic force continues to be applied, and a punched side is subjected to flanging forming. The device comprises a female die, the friction thrust set, the translation path and the flanging path, the high-temperature region is arranged on the female die, radial horizontal thrust coils are arranged on the side portions of the friction thrust set, and axial drawingcoils are arranged above the flanging path. The method and device have the beneficial effects of being uniform and stable in forming, high in plastic deformation capacity and low in energy consumption.

Description

technical field [0001] The invention mainly relates to the technical field of high-speed forming in plastic processing of materials, in particular to a forming method and a forming device for large-size sheet metal by partial electromagnetic deep drawing and turning holes. Background technique [0002] Electromagnetic pulse forming is a method of high-speed machining of metal workpieces using pulsed magnetic field force, which can effectively improve the forming limit of hard-to-deform materials such as aluminum alloys, magnesium alloys and titanium alloys, and reduce springback. In the document "Research on Flanging Process of Round Holes in Aluminum Alloy Sheets Based on Magnetic Pulse Technology", Zhang Wenzhong et al. mentioned that the use of magnetic pulse technology has realized the hole-turning of parts with a diameter of about 80 mm, which has significantly improved the plasticity of the material, and the flanging coefficient has reached 0.76. In the patent "Formin...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityPatents(China)
IPC IPC(8): B21D26/14B21D19/00
Inventor崔晓辉肖昂李坤喻海良杜志浩
OwnerCENT SOUTH UNIV