Large-curvature variable-section titanium alloy skin one-step hot-press forming die

A hot-press forming and titanium alloy technology, which is applied in forming tools, manufacturing tools, metal processing equipment, etc., can solve the problems of hot pressing of molds that cannot have blank holders, so as to improve the yield, reduce the cost of sheet metal input, Avoid wrinkle effects

Active Publication Date: 2019-07-05
AEROSPACE HIWING HARBIN TITANIUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the existing large-curvature, variable-section titanium alloy sheet metal parts forming machine cannot hot-press the mold with the blank holder, the present invention proposes a large-curvature, variable-section titanium alloy skin one-time hot-press forming Mold, the technical scheme adopted is as follows:

Method used

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  • Large-curvature variable-section titanium alloy skin one-step hot-press forming die
  • Large-curvature variable-section titanium alloy skin one-step hot-press forming die
  • Large-curvature variable-section titanium alloy skin one-step hot-press forming die

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Experimental program
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Effect test

Embodiment 1

[0025] Such as Figure 1 to Figure 8 As shown, a large curvature, variable cross-section titanium alloy skin one-time hot pressing forming mold, the mold is only composed of a punch and a die, and there is no blank holder in the middle layer; the outside of the punch is provided with a blank holder , the inside is provided with a profile area, the height of the profile area is lower than the outer blanking; the internal profile of the blank is the same as the part profile; Inside: there is a gap between the outer side of the die and the inner side of the blank holder.

[0026] The forming method of the hot press molding of the mold is to clamp the sheet material in advance by clamping the die and the punch, and the sheet material is always in a clamped state during the continuous mold clamping process, thereby achieving the edge-holding effect, and then through The blanking size of the part to be formed is accurately calculated to reduce the process end of the part, avoid sta...

Embodiment 2

[0035] A large-curvature, variable-section titanium alloy skin one-time hot-press forming die. During the forming process of large-curvature, variable-section titanium alloy parts, firstly, through the external dimensions of the parts, the unfolded material is accurately calculated in the form of grid drawing approximate to calculus. , after calculating the unfolded material, on the basis of ensuring accurate positioning and no scrapped parts, the process end of the parts should be reduced as much as possible. If the height of the part is small, it is necessary to add a process end to keep the sheet in a clamped state during the hot pressing process, but the process end of the sheet needs to be processed and lowered into a zigzag shape to prevent the sheet from stacking and forming wrinkles. Finally, it should be noted that after the mold is completely closed, no flanges are formed, and all the flanges in the hot pressing process are converted into vertical edges, because the g...

Embodiment 3

[0039] A large curvature, variable cross-section titanium alloy skin one-time hot pressing forming die in the process of forming large curvature, variable cross-section titanium alloy parts, such as figure 1 As shown, firstly, the developed material of the part is accurately calculated by means of calculus, and the technological end of the part is given according to the height of the part. If the height of the part is low, the process end is appropriately enlarged so that the part is always in a clamped state during the forming process. If the height of the part is too large, try to reduce the technological end of the part to prevent the stacking of the sheets during the forming process, resulting in wrinkles. The technological end range is between 6mm and 20mm. The expansion diagram is shown in the attached figure 2 shown.

[0040] as attached Figure 3 to Figure 8 As shown, the forming area of ​​the punch is lower than the outer blank holder. Here, the fillet of the punch...

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Abstract

The invention provides a large-curvature variable-section titanium alloy skin one-step hot-press forming die, and belongs to the technical field of titanium alloy material forming. The die only consists of a male die and a female die, and no blank holder is arranged in the middle layer. A blank is arranged on the outer side of the male die, a profile area is arranged in the male die, and the height of the profile area is lower than that of the blank on the outer side. The die is suitable for one-step hot pressing forming of large-curvature variable-section titanium alloy skin. The die has theadvantages of improving the forming efficiency of large-curvature variable-section titanium alloy parts and the like.

Description

technical field [0001] The invention relates to a large-curvature, variable-section titanium alloy skin one-time hot-press forming die, which belongs to the technical field of titanium alloy material forming. Background technique [0002] At present, the hot forming method of titanium alloy sheet metal parts with large curvature and variable cross-section is to use a hot press forming machine with a top cylinder to produce three layers including upper, middle and lower layers, that is, a die-to-plate with a blank holder. The blank holder force is applied to the material in advance to realize the hot press forming of the part. At present, most of the hot press forming machines are only composed of upper and lower platforms, and do not contain jacking cylinders. They can only hot press molds consisting of convex and concave molds, but cannot hot press molds with blank holders. It will cost a lot of manpower and financial resources to transform this thermoforming machine, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D37/10B21D22/22
CPCB21D22/22B21D37/10
Inventor 丛宇鹏杨小克宣立坤丁锐赵倩倩杨敏贺晓峰孟令园
Owner AEROSPACE HIWING HARBIN TITANIUM IND
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