Device for performing double curvature sheet bending and forming by utilizing electronic universal testing machine

A universal testing machine and bending forming technology, which is applied in the direction of forming tools, metal processing equipment, manufacturing tools, etc., can solve the problems that the double curvature parts are difficult to ensure the curvature accuracy requirements of the formed parts, so as to improve the forming accuracy, ensure the forming accuracy, avoid Effect of multiple disassembly and commissioning procedures

Active Publication Date: 2014-03-19
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the existing double-curvature part forming technology is difficult to ensure the curvature accuracy requirements

Method used

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  • Device for performing double curvature sheet bending and forming by utilizing electronic universal testing machine
  • Device for performing double curvature sheet bending and forming by utilizing electronic universal testing machine
  • Device for performing double curvature sheet bending and forming by utilizing electronic universal testing machine

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0012] Specific implementation mode 1: Combination Figure 1 ~ Figure 5 To illustrate this embodiment, this embodiment includes an upper nut 1, a male mold 2, a female mold 3, a female mold base 4, a lower nut 6, an ejector rod 7 and four positioning bolts 5. The lower end of the female mold base 4 is provided with a lower Connect the bolt 4-1, the upper end of the die base 4 is provided with a die through slot 4-2, and the die through slot 4-2 corresponding to the die base 4 is provided with two positioning screw holes 4-3 on each side wall , The two locating screw holes 4-3 on the left wall correspond to the two locating screw holes 4-3 on the right wall one-to-one, each locating screw hole 4-3 is threaded to connect a locating bolt 5, and the die 3 is set In the die through groove 4-2, the upper end surface of the die 3 is provided with a double-curvature arc groove 3-1, and the double-curvature arc groove 3-1 is provided with a transverse arc groove 3-1 along the transverse ...

Example Embodiment

[0014] Specific implementation manner two: combination figure 2 with Figure 4 To describe this embodiment, the difference between the radius of curvature of the transverse arc groove 3-1-1 and the radius of curvature of the transverse arc surface 2-2-1 of this embodiment is the thickness of the formed sheet. The other components and connection relationships are the same as in the first embodiment.

Example Embodiment

[0015] Specific implementation mode three: combination figure 2 with Figure 4 To describe this embodiment, the difference between the radius of curvature of the longitudinal arc groove 3-1-2 and the radius of curvature of the longitudinal arc surface 2-2-2 of this embodiment is the thickness of the formed sheet. Other components and connection relationships are the same as those in the first or second embodiment.

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Abstract

The invention discloses a device for performing double curvature sheet bending and forming by utilizing an electronic universal testing machine and relates to a sheet bending and forming device for solving the problem that the curvature precision requirement of a forming part is difficultly guaranteed in a conventional double curvature part forming technology. A female die is arranged in a female die straight slot; a double curvature arc groove is formed in an upper end face of the female die; the double curvature arc groove is provided with a transverse arc groove along the transverse direction and is also provided with a longitudinal arc groove along the longitudinal direction; inclined holes are symmetrically formed in a side face of the female die which corresponds to the longitudinal arc groove; a double curvature arc surface is arranged on a lower end face of a male die; the double curvature arc surface is provided with a transverse arc surface with the same radian as that of the transverse arc groove along the transverse direction and is also provided with a longitudinal arc surface with the same radian as that of the longitudinal arc groove along the longitudinal direction; an upper nut is in threaded connection with an upper connecting bolt; a lower nut is in threaded connection with a lower connecting bolt; and the double curvature arc surface of the male die is arranged in the double curvature arc groove. The device is used for double curvature metal sheet bending and forming.

Description

technical field [0001] The invention relates to a plate bending forming device, in particular to a device for bending and forming a double-curvature plate by using an electronic universal testing machine. Background technique [0002] Double-curvature parts are mostly used in the aerospace industry, such as aircraft skins, double-curvature panels, etc., and also occupy a certain proportion in the civilian field. The radius of curvature of double-curvature parts changes in different directions, so the complex geometric profile also increases the difficulty of manufacturing molds. In the actual production of double-curvature sheet metal parts, it is necessary to consider the problems between the upper and lower dies and the placement of the sheet on the die. At the same time, under some working conditions, the formed sheet is completely close to the cavity of the die, which is not easy take out. The existing multi-point bending process is a method for forming double-curvatur...

Claims

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Application Information

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IPC IPC(8): B21D11/00B21D37/10
Inventor 宗影影刘坡李建伟单德彬郭斌
Owner HARBIN INST OF TECH
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