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Forming method of large asymmetric near-ring forging preform

An asymmetric and prefabricated blank technology, applied in the direction of metal processing equipment, etc., can solve the problems of increased material production costs, damage to material properties, and the inability to realize the production of preformed blanks for large asymmetric near-ring forgings, etc., and achieve on-site operability Strong, improved material structure and performance, good equipment versatility

Inactive Publication Date: 2010-10-06
NORTHWESTERN POLYTECHNICAL UNIV +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcomings existing in the prior art that the production of large-scale asymmetric near-ring forging preform blanks cannot be realized, or the performance of the material is destroyed, or the production cost of the material is increased, the present invention proposes a large-scale asymmetric near-ring forging blank. Forming method of ring forging preform

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] This embodiment is a TA15 titanium alloy integral stiffened plate member with a profile size of 1.09×0.97m and a weight of 75 kg, and the final thickness of the preform is 30mm. Two bosses with different sizes but high sheds are required on the left and right sides above the blank. The length × width of the small boss is 140×55mm, the width of the upper end of the big boss is 330mm, the width of the lower end is 287mm, and the height is 376mm: and One side that is closely connected with two bosses is a semicircular frame of r=406mm, and the hole of d=634mm is arranged in the frame.

[0016] In this embodiment, except that the punching process is fully formed on an 8000-ton press with a forming speed of 1mm / s, all other processes are formed by a 40 / 45MN fast forging machine with a forming speed of 10mm / s. The entire forming process needs five fire times to complete, and each fire time is heated to T β Insulation at -40°C for 1 hour: Each deformation process blank is wra...

Embodiment 2

[0030] This embodiment is a TA15 titanium alloy integral stiffened plate member with a profile size of 1.55×1.37m and a weight of 150 kg, and the final thickness of the preform is 43mm. Two bosses of equal height but different sizes are required on the left and right sides above the blank. The length × width of the small boss is 200×78mm, the width of the upper end of the big boss is 466mm, the width of the lower end is 406mm, and the height is 532mm; One side of connecting two bosses is a semicircular frame of r=575mm, and the hole of d=896mm is arranged in the frame.

[0031] In this embodiment, except that the punching process is formed on an 8000-ton press with a forming speed of 1mm / s, all other processes are formed by a 40 / 45MN fast forging machine with a forming speed of 10mm / s. The entire forming process needs eleven fire times to complete, and each fire time is heated to T β Insulation at -40°C for 2 hours; each deformation process blank is wrapped with thermal insul...

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Abstract

The present invention is a method for forming a prefabricated blank of a large-scale asymmetric near-ring forging, which adopts the process of combining free forging with a membrane forging or a V-shaped anvil, and the process includes preforming, forming with a membrane or a V-shaped anvil, drawing Long blanks, punching and correction, forming blanks through multiple fires. In the present invention, a flat anvil is used to press the preformed blank placed on the tire membrane or a V-shaped anvil into an arc shape, and the two bosses are locally indented and formed multiple times with the guide rod according to the order of first two sides and then the middle; For the long blank, use the flat anvil to flatten the blank to the same plane in the same direction after each elongation; when punching, punch holes on both sides of the formed square area multiple times. The invention solves the difficulties of high pre-forging die cost, unsatisfactory equipment tonnage, and unsuitable machining for producing blanks with complex shapes when prefabricating large and complex components; and improves the structure and performance of materials through forging, and improves the utilization rate of materials. It has the characteristics of simple process, strong field operability and good equipment versatility.

Description

1. Technical field [0001] The invention relates to the field of thermal processing, in particular to a method for forming a preform of a large asymmetric near-ring forging. 2. Background technology [0002] In order to meet the requirements of improving structural performance, reducing structural weight, shortening production cycle and reducing cost in aviation, aerospace, weapons, ships and other fields, the integral forming of complex components has become an important development direction. At the same time, the structural parts used in aerospace vehicles, In particular, large complex structural parts (such as large asymmetric near-ring forgings) are used under very harsh service conditions. In order to ensure its performance, these forgings are generally produced with expensive new structural materials (such as titanium alloys), and the macroscopic mechanical properties and microstructure requirements of this type of forgings are very strict. The shape, size and perform...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21J5/02
Inventor 孙志超杨合彭飞飞周建华苑世剑王晓英阮立新周义刚樊晓光王向明吴跃江贾蔚菊
Owner NORTHWESTERN POLYTECHNICAL UNIV
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