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Forming method of large-concentration-ratio upset forging components made of titanium alloy

A technology of titanium alloy top and aggregation ratio, which is applied in the direction of engine components, metal processing equipment, mechanical equipment, etc., can solve problems such as difficult upsetting aggregation, improve coaxiality and surface quality, reduce grinding amount, and reduce production cost effect

Active Publication Date: 2016-02-17
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problem in the prior art that it is difficult to upforge rod-type top forgings with a relatively large aggregation ratio, and to provide a forming method for titanium alloy top forgings with a large aggregation ratio

Method used

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  • Forming method of large-concentration-ratio upset forging components made of titanium alloy
  • Forming method of large-concentration-ratio upset forging components made of titanium alloy
  • Forming method of large-concentration-ratio upset forging components made of titanium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Pre-cast an aero-engine blade, such as Figure 1~3 It can be seen from the figure that due to the large difference between the two ends of the blade, it is necessary to use a rod-type forging blank with a large aggregation ratio; moreover, the shape of the side plate 1 of the blade is complicated, and it is difficult to fill the mold with a disc-shaped forging blank Therefore, it is necessary to prepare a rod-type forging blank with a large aggregation ratio whose thick end is a parallelogram flat cylinder.

[0032] The preparation method of the large aggregate ratio rod forging blank whose thick end is a parallelogram flat cylinder is as follows:

[0033] 1. Take a titanium alloy bar, the ratio of the diameter to the length of the bar is 7, heat the bar to 950-1000°C, put one end into a forging die, the die is a truncated cone with one end open, and the open end is The thick end of the cone; forging with a pressure of 6000kN on the forging machine until the diameter r...

Embodiment 2

[0042]1. Take a titanium alloy bar. The ratio of diameter to length of the bar is 9. After heating the bar to 900-950°C, put one end into a forging die. The die is a truncated cone with one end open, and the open end is The thick end of the cone; forging with a pressure of 5000kN on a forging machine until the diameter ratio of the large end and small end of the deformed part of the bar in the die is 1.1, and the large end and the undeformed part form an R40 bending angle;

[0043] 2. After heating the forging billet of the first forging to 900-950°C, put the deformed end into the second forging die. The die is a frustum with one end open, and the open end is the thick end of the frustum; use a pressure of 5000kN on the forging machine Carry out forging until the diameter ratio of the big end and the small end of the deformed part of the forging billet in the die is 1.1, and the big end and the undeformed part form an R40 bend;

[0044] 3. After heating the forging billet of t...

Embodiment 3

[0050] 1. Take a titanium alloy bar. The ratio of diameter to length of the bar is 5. After heating the bar to 900-950°C, put one end into a forging die. The die is a truncated cone with one end open, and the open end is The thick end of the cone; forging with a pressure of 7000kN on the forging machine until the diameter ratio of the big end and the small end of the deformed part of the bar in the die is 1.3, and the large end and the undeformed part form an R50 bending angle;

[0051] 2. After heating the forging billet of the first forging to 900-950°C, put the deformed end into the second forging die. The die is a frustum with one end open, and the open end is the thick end of the frustum; use a pressure of 7000kN on the forging machine Carry out forging until the diameter ratio of the big end and the small end of the deformed part of the forging billet in the die is 1.3, and the big end and the undeformed part form an R50 bend;

[0052] 3. After heating the forging billet...

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Abstract

The invention aims at solving the problem that upset forging rods with large concentration ratio are difficult to obtain by an upset forging manner in the prior art, and provides a forming method of large-concentration-ratio upset forging components made of titanium alloy. The method comprises the following steps of: taking a bar material made of the titanium alloy, heating the bar material, and placing one end of the bar material in a forging die; performing forging with a forging machine till the ratio of the diameter of the large end of the deforming part of the bar material in the die to the diameter of the small end of the deforming part of the bar material is 1.1-1.5 and the large end and the part which does not deform form a bending angle of R30-R50; performing forging seven times so as to obtain an upset forging component with large concentration ratio. According to the method, the bar material made of the titanium alloy is used as a starting material, through seven times of upset forging, a titanium-alloy upset forging blank with a large end in a parallelogram cylinder shape, a rhombic cylinder shape, a cylindrical shape, or an elliptic cylinder shape and the like is formed, and the maximum concentration ratio reaches 7.1. Through the adoption of the method, the coaxiality of forging blanks and the surface quality of the forging blanks are improved; the grinding amount in subsequent procedures is reduced, and the qualification rate of final forgings is increased; the production efficiency is improved; the production cost is reduced.

Description

technical field [0001] The invention belongs to the field of metal plastic forming, in particular to a forming method of a titanium alloy top forging with a large aggregation ratio. Background technique [0002] Upset forgings are divided into rod forgings with thick parts, forgings with through holes or non-through holes without rods, extrusions, pipe upsetting forgings, etc. [0003] Among stainless steel forgings, the aggregation ratio of rod forgings with thick parts (that is, the ratio of the length of the thick part to the diameter of the bar) can reach more than 10. However, the aggregation ratio of titanium alloy top forgings is relatively small, generally 1.2 to 1.4, which is only suitable for upsetting of general parts or blanking of small and medium blades. This is because the metal fluidity of titanium alloy itself is poor, and its toughness is also lower than that of stainless steel. [0004] At present, some aeroengines use titanium alloy blade mounting plate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21K3/04B21J5/02
CPCB21J5/022B21K3/04
Inventor 朴顺南张鑫史丽坤张东丽曹雪梅
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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