Springback compensation method in heating bending technology

A technology of heating bending and springback compensation, which is applied in metal processing, metal processing equipment, manufacturing tools, etc., can solve the problems of differences in mechanical properties and difficulty in ensuring the consistency of results, so as to improve flexibility and save time for mold repair and trial. , improve the effect of consistency

Active Publication Date: 2019-04-16
YANSHAN UNIV
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  • Application Information

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Problems solved by technology

In response to the demand for energy saving and emission reduction of automobiles, the demand for high-strength sheets is increasing, but with the increase of yield and strength of high-strength sheets, the amount of bending springback is also greater. For the mold bending process, if the sheet performance Consistent, you can adjust the shape ...

Method used

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  • Springback compensation method in heating bending technology
  • Springback compensation method in heating bending technology
  • Springback compensation method in heating bending technology

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Embodiment Construction

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments.

[0023] figure 1 It is a flow chart of the bending springback compensation method of the present invention, such as figure 1 As shown, the method includes:

[0024] Step A, select two different forming temperatures to carry out the heating bending experiment of determining parameter k;

[0025] Step B, calculating the bending angle slope k of the material after springback in heating and bending;

[0026] Step C, determining the temperature of the first formal bending forming experiment;

[0027] Step D, using the parameter k and the bending angle...

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Abstract

The invention discloses a springback compensation method in a heating bending technology. The method includes the following steps that two different forming temperatures are selected, and the bendingangles after springback at the two temperatures are measured respectively; the angle slopes of the bending angles after springback of a material during heating bending forming are calculated by the aid of the selected forming temperatures and the corresponding bending angles after springback; the first-time formal bending forming temperature is determined according to the angle slopes of the bending angles, and the bending angles after springback at the corresponding temperatures are measured; and the current-time forming temperature is corrected by the aid of the deviation of the last-time bending angle after springback from the target bending angle until the number of bending forming times reach the preset number of formed pieces. According to the method, under the condition that mold parameters in a mold bending technology are not changed, the bending angle after springback in the mold bending technology can be compensated through adjustment of the temperature applied to a plate, sothat the consistency of angles of bent pieces after forming is improved, the time for mold repairing and mold testing is saved, and the flexibility for forming plates made of different materials by the aid of one set of molds is improved.

Description

technical field [0001] The invention relates to the field of material processing, in particular to a springback compensation method in a heating bending process. Background technique [0002] In the sheet bending process, the outer fiber of the sheet is subjected to tensile strain and the inner fiber is subjected to compressive strain. When the external force is unloaded, the inner fiber releases the compressive stress and elongates, and the outer layer fiber releases the tensile stress and shrinks, so that the sheet bends After unloading, the bending angle decreases compared with that before unloading, and the decrease of bending angle is the amount of bending springback. The amount of springback of the sheet is affected by many factors, such as material properties, geometry of bending parts, etc. In response to the demand for energy saving and emission reduction of automobiles, the demand for high-strength sheets is increasing, but with the increase of yield and strength ...

Claims

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Application Information

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IPC IPC(8): B21D5/06B21C51/00B21D37/16
CPCB21D5/006B21D5/06B21D37/16
Inventor 段永川杨柳姚丹高安娜田乐
Owner YANSHAN UNIV
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