CN114289677A - Rolling forming method for titanium alloy non-uniform-thickness special-shaped thin-wall ring piece - Google Patents
Rolling forming method for titanium alloy non-uniform-thickness special-shaped thin-wall ring piece Download PDFInfo
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- CN114289677A CN114289677A CN202111534334.3A CN202111534334A CN114289677A CN 114289677 A CN114289677 A CN 114289677A CN 202111534334 A CN202111534334 A CN 202111534334A CN 114289677 A CN114289677 A CN 114289677A
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- 238000005096 rolling process Methods 0.000 title claims abstract description 48
- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000005242 forging Methods 0.000 claims abstract description 43
- 238000010438 heat treatment Methods 0.000 claims abstract description 28
- 238000010275 isothermal forging Methods 0.000 claims abstract description 14
- 238000004080 punching Methods 0.000 claims abstract description 7
- 235000015895 biscuits Nutrition 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 2
- 238000003754 machining Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 101000919504 Gallus gallus Beta-crystallin B1 Proteins 0.000 description 2
- 229910020890 PHI 650 Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Abstract
The invention relates to a rolling forming method of an annular forging, in particular to a rolling forming method of a titanium alloy non-uniform-thickness special-shaped thin-wall ring piece. The method comprises the following steps: heating a titanium alloy bar to a set first temperature, upsetting a cake and rounding the bar to obtain a titanium alloy cake blank, wherein the upsetting deformation amount of each heating is controlled to be 20-45%; heating the titanium alloy cake blank to the set second temperature, and punching the titanium alloy cake blank by using a special punch; heating the cake blank to a set third temperature, putting the cake blank into a forming die for die forging, and carrying out isothermal forging to obtain a special-shaped ring blank; the center hole of the special-shaped ring blank is a step hole; putting the special-shaped ring blank into a special-shaped rolling machine, and rolling and forming by multiple fire to obtain a non-uniform-thickness thin-wall ring forging; wherein, the deformation rate of each heating is 20-40%, the rolling is radially widened at the speed of 5-10mm/s, the wall thickness is gradually reduced, and the aperture of the central hole is gradually increased.
Description
Technical Field
The invention relates to a rolling forming method of an annular forging, in particular to a rolling forming method of a titanium alloy non-uniform-thickness special-shaped thin-wall ring piece.
Background
The titanium alloy ring forging has wide application prospect in the field of aerospace, and is produced by machining the traditional equal-thickness straight-wall forging aiming at the non-equal-thickness thin-wall ring forging, so that the forging has low dimensional precision, and the material utilization rate is low particularly under the condition of large wall thickness difference.
Disclosure of Invention
The purpose of the invention is: the method for producing the titanium alloy thin wall with the non-equal thickness by adopting the isothermal forging and the ring rolling has the advantages that the isothermal forging is adopted for producing the pre-rolled blank, the deformation is uniform, the special-shaped core roller and the pre-rolled blank rotate synchronously and in the same direction, the synchronous deformation of the inner ring end face and the outer ring end face of the pre-rolled blank can be guaranteed, the phenomena of flattening and horn mouth are prevented, the size precision of a rolled forge piece is high, the precise ring rolling is realized, and the forge piece material is saved.
In order to solve the technical problem, the technical scheme of the invention is as follows:
a rolling forming method of a titanium alloy non-uniform-thickness special-shaped thin-wall ring piece comprises the following steps:
heating a titanium alloy bar to a set first temperature, upsetting a cake and rounding the bar to obtain a titanium alloy cake blank, wherein the upsetting deformation amount of each heating is controlled to be 20-45%;
heating the titanium alloy cake blank to the set second temperature, and punching the titanium alloy cake blank by using a special punch;
heating the cake blank to a set third temperature, putting the cake blank into a forming die for die forging, and carrying out isothermal forging to obtain a special-shaped ring blank; the center hole of the special-shaped ring blank is a step hole;
putting the special-shaped ring blank into a special-shaped rolling machine, and rolling and forming by multiple fire to obtain a non-uniform-thickness thin-wall ring forging;
wherein, the deformation rate of each heating is 20-40%, the rolling is radially widened at the speed of 5-10mm/s, the wall thickness is gradually reduced, and the aperture of the central hole is gradually increased.
Furthermore, the minimum value of the wall thickness of the non-uniform-thickness thin-wall ring forging is 30mm, the wall thickness ratio ranges from 1 to 3, and the height-thickness ratio ranges from 1 to 25.
Further, in the isothermal forging, the deformation rate is in the range of 0.5 to 2 mm/s.
Further, in the isothermal forging, the mold temperature range is 800-.
Furthermore, the special-shaped rolling mill is divided into a large end and a small end by a step surface, the side surface of the large end of the special-shaped rolling mill is tangent to the inner wall of the large end of the step hole of the special-shaped ring blank, and the side surface of the small end of the special-shaped rolling mill is tangent to the inner wall of the small end of the step hole of the ring-shaped blank, namely one side of the longitudinal section of the special-shaped rolling mill is attached to one side of the longitudinal section of the step hole of the special-shaped ring blank.
Further, before the cake blank is heated to a set temperature and is placed into a forming die for isothermal forging to obtain the special-shaped ring blank, the method further comprises the following steps:
and (4) removing the damage of the punched cake blank machine, removing surface cracks and chamfering.
Further, before the special-shaped ring blank is placed on a special-shaped rolling mill and rolled and formed by multiple fire, and a non-uniform-thickness thin-wall ring forging is obtained, the method further comprises the following steps:
and (4) adding and removing damages to the special-shaped ring blank machine, and removing surface cracks and chamfers.
Further, the first temperature, the second temperature and the third temperature range from 25 ℃ to 55 ℃ below the phase transition temperature.
The invention has the beneficial effects that:
the invention adopts isothermal die forging to produce the pre-rolled cake blank, which can lead the cake to deform uniformly and obtain the pre-rolled cake blank with uniform tissue; the special-shaped mandrel is adopted for rolling, so that different ring forging parts can be uniformly deformed simultaneously in the deformation process of the ring forging, the thin-wall forging with excellent thin wall and uniform tissue is obtained, and the special-shaped mandrel has high reference significance for the production of the ring rolling forging.
Drawings
FIG. 1 is a drawing of a TA15 titanium alloy thin-walled ring forging with unequal thickness.
Fig. 2 is a schematic view of a punch and a biscuit.
FIG. 3 is a schematic view of a TA15 titanium alloy isothermally forged pre-rolled billet.
FIG. 4 is a schematic diagram of TA15 titanium alloy ring rolling swing with non-uniform thickness and thin wall.
FIG. 5 is a schematic diagram of the positioning and rolling states of a TA15 titanium alloy thin-wall ring pre-rolling mill.
Detailed Description
In order to make the objects, 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 with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention relates to a method for forming a titanium alloy thin-wall ring forging with unequal thickness, which adopts the technical scheme that the method comprises the following steps:
heating the titanium alloy bar to a set temperature, upsetting the bar in a 16MN oil press or a 2500t quick forging press, and rounding, wherein the upsetting deformation of each heating is controlled to be 20-45%.
And heating the titanium alloy cake blank to a set temperature, and punching the bar on a 16MN oil press or a 2500t quick forging machine by using a special punch.
And (3) adding a flaw removal machine to the punched cake blank, removing surface cracks and chamfering.
Heating the machined cake blank to a set temperature, putting the heated cake blank into a forming die for die forging, and carrying out isothermal forging by adopting a 100MN or 200MN oil press, wherein the deformation rate is as follows: 0.5-2mm/s, mold temperature: 800 ℃ and 900 ℃.
And (4) adding and removing the flaw of the die forging machine, and removing surface cracks and chamfers.
And (3) putting the die forging piece into a special-shaped roller to be rolled and formed by two times of heating, wherein the deformation rate of each heating is 20-40%, the rolling is radially widened at the speed of 5-10mm/s, and the wall thickness is gradually reduced.
The minimum value of the wall thickness of the thin-wall ring forging with unequal thickness rolled by the rolling forming method is 30mm, the wall thickness ratio is 1-3, and the height-thickness ratio is 1-25.
The rolling process has the advantages of high rolling speed, uniform deformation, high forging size precision, excellent surface quality, uniform structure and performance and the like, and on one hand, the metal streamline is reserved, and the strength performance of the material is improved; on the other hand, the utilization rate of the titanium alloy is increased, the cost of the forging is reduced, and the method is an advanced production process of the thin-wall ring forging.
Examples
The rolling forming of the titanium alloy non-uniform-thickness thin-wall ring piece (shown in figure 1) needs to provide equipment such as a forging heating furnace, a 16MN oil press or a 2500t quick forging machine, a 100 or 200MN oil press, isothermal forging equipment, a ring rolling mill, a manipulator and the like.
The rolling forming process for producing the thin-wall ring piece with unequal thickness comprises the following steps:
the method comprises the following steps: upsetting cake
The method comprises the steps of blanking a TA15 titanium alloy bar with the diameter of 400 x 1200mm according to specification at the temperature of (T beta-35) DEG C, calculating the heat preservation coefficient according to 0.8mm/min, upsetting and rounding the bar on a 2500T quick forging machine for two times to prepare a cake blank, wherein the upsetting deformation of each time is 35%, and the final cake size is the diameter of 900 x 255 mm.
Step two: punching hole
Heating the cake blank to (Tbeta-35) DEG C, calculating the heat preservation coefficient according to 0.8mm/min, punching by using a punch with the specification of phi 650 multiplied by 255mm, and finally punching to obtain the cake with the specification of phi 970 multiplied by phi 650 multiplied by 225 mm. The punch and punched biscuit are shown in figure 2.
Step three: machining flaw removal
And (3) machining the punched cake to remove damage, wherein the final size is phi 960 multiplied by phi 660 multiplied by 225 mm.
Step four: isothermal forging of forming die
And (3) carrying out die isothermal forging on the machined cake material in a 200MN oil press, heating the cake material to the temperature of (T beta-35) DEG C, calculating the heat preservation coefficient according to 0.8mm/min, heating the die at the temperature of 800 ℃, and pressing down at the speed of 0.5mm/s, wherein the die and the die are shown in figure 3.
Step five: machining flaw removal
And (3) machining the forging piece subjected to the isothermal tire die forging to remove damage.
Step six: ring rolling
And (2) rolling the machined isothermal die forging on a special-shaped ring forging mill with the diameter of 2.0m, putting the die forging on the special-shaped rolling mill, performing rolling forming on the die forging by two heating, wherein the deformation rate per heating is 25%, the arrangement positions of a core roller and a pre-rolled blank are shown in figure 4, the rolling speed is increased radially at the speed of 8mm/s, the wall thickness is gradually reduced, and the size of the final ring forging is shown in figure 1. The schematic view of the positioning and rolling states of the pre-rolling mill is shown in fig. 5.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present invention, and these modifications or substitutions should be covered within the scope of the present invention.
Claims (8)
1. A rolling forming method of a titanium alloy non-uniform-thickness special-shaped thin-wall ring piece is characterized by comprising the following steps:
heating a titanium alloy bar to a set first temperature, upsetting a cake and rounding the bar to obtain a titanium alloy cake blank, wherein the upsetting deformation amount of each heating is controlled to be 20-45%;
heating the titanium alloy cake blank to the set second temperature, and punching the titanium alloy cake blank by using a special punch;
heating the cake blank to a set third temperature, putting the cake blank into a forming die for die forging, and carrying out isothermal forging to obtain a special-shaped ring blank; the center hole of the special-shaped ring blank is a step hole;
putting the special-shaped ring blank into a special-shaped rolling machine, and rolling and forming by multiple fire to obtain a non-uniform-thickness thin-wall ring forging;
wherein, the deformation rate of each heating is 20-40%, the rolling is radially widened at the speed of 5-10mm/s, the wall thickness is gradually reduced, and the aperture of the central hole is gradually increased.
2. The method according to claim 1, wherein the non-uniform thickness thin-walled ring forging has a wall thickness of a minimum of 30mm, a wall thickness ratio in the range of 1 to 3, and a height to thickness ratio in the range of 1 to 25.
3. The method according to claim 1, wherein in isothermal forging, the deformation rate is in the range of 0.5-2 mm/s.
4. The method as claimed in claim 1, wherein the die temperature ranges from 800-.
5. The method of claim 1, wherein the special-shaped rolling mill is divided into a large end and a small end by a step surface, the side surface of the large end of the special-shaped rolling mill is tangent to the inner wall of the large end of the step hole of the special-shaped ring blank, and the side surface of the small end of the special-shaped rolling mill is tangent to the inner wall of the small end of the step hole of the ring-shaped blank, namely, one side of a longitudinal section of the special-shaped rolling mill is attached to one side of a longitudinal section of the step hole of the special-shaped ring blank.
6. The method of claim 1, wherein before heating the biscuit to a set temperature, placing the biscuit in a die for die forging, and performing isothermal forging to obtain the shaped ring blank, the method further comprises:
and (4) removing the damage of the punched cake blank machine, removing surface cracks and chamfering.
7. The method of claim 1, wherein before the special-shaped ring blank is placed on a special-shaped rolling machine to be rolled and formed by multiple fire, and a thin-wall ring forging with unequal thickness is obtained, the method further comprises the following steps:
and (4) adding and removing damages to the special-shaped ring blank machine, and removing surface cracks and chamfers.
8. The method of claim 1, wherein the first temperature, the second temperature, and the third temperature range from 25 ℃ to 55 ℃ below the phase transition temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111534334.3A CN114289677A (en) | 2021-12-15 | 2021-12-15 | Rolling forming method for titanium alloy non-uniform-thickness special-shaped thin-wall ring piece |
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| CN202111534334.3A CN114289677A (en) | 2021-12-15 | 2021-12-15 | Rolling forming method for titanium alloy non-uniform-thickness special-shaped thin-wall ring piece |
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| CN202111534334.3A Pending CN114289677A (en) | 2021-12-15 | 2021-12-15 | Rolling forming method for titanium alloy non-uniform-thickness special-shaped thin-wall ring piece |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115608891A (en) * | 2022-09-30 | 2023-01-17 | 中南大学 | Method and device for manufacturing special-shaped section transition ring of rocket tank |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101279345A (en) * | 2008-04-23 | 2008-10-08 | 贵州安大航空锻造有限责任公司 | Rolling forming method of titanium alloy special-shaped ring forging |
| CN102029342A (en) * | 2010-12-10 | 2011-04-27 | 贵州航宇科技发展有限公司 | Method for rolling and forming TC11 titanium alloy thin-walled rings |
| CN103350329A (en) * | 2013-06-30 | 2013-10-16 | 贵州安大航空锻造有限责任公司 | Blank making method of large 4340 H steel special-shaped ring forging |
| CN104550583A (en) * | 2014-12-15 | 2015-04-29 | 贵州安大航空锻造有限责任公司 | Method for rolling and forming alpha-phase titanium alloy thick-wall ring forging |
| CN104550622A (en) * | 2014-12-15 | 2015-04-29 | 贵州安大航空锻造有限责任公司 | Method for rolling and forming beta-phase titanium alloy thick-wall ring forging |
| CN108405769A (en) * | 2018-01-25 | 2018-08-17 | 张家港中环海陆特锻股份有限公司 | The manufacturing method of forging special-shape ring in open coal mine excavator |
| CN113510208A (en) * | 2020-04-09 | 2021-10-19 | 陕西长羽航空装备有限公司 | Local die forging and rolling combined forming method for titanium alloy T-shaped section ring piece |
-
2021
- 2021-12-15 CN CN202111534334.3A patent/CN114289677A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101279345A (en) * | 2008-04-23 | 2008-10-08 | 贵州安大航空锻造有限责任公司 | Rolling forming method of titanium alloy special-shaped ring forging |
| CN102029342A (en) * | 2010-12-10 | 2011-04-27 | 贵州航宇科技发展有限公司 | Method for rolling and forming TC11 titanium alloy thin-walled rings |
| CN103350329A (en) * | 2013-06-30 | 2013-10-16 | 贵州安大航空锻造有限责任公司 | Blank making method of large 4340 H steel special-shaped ring forging |
| CN104550583A (en) * | 2014-12-15 | 2015-04-29 | 贵州安大航空锻造有限责任公司 | Method for rolling and forming alpha-phase titanium alloy thick-wall ring forging |
| CN104550622A (en) * | 2014-12-15 | 2015-04-29 | 贵州安大航空锻造有限责任公司 | Method for rolling and forming beta-phase titanium alloy thick-wall ring forging |
| CN108405769A (en) * | 2018-01-25 | 2018-08-17 | 张家港中环海陆特锻股份有限公司 | The manufacturing method of forging special-shape ring in open coal mine excavator |
| CN113510208A (en) * | 2020-04-09 | 2021-10-19 | 陕西长羽航空装备有限公司 | Local die forging and rolling combined forming method for titanium alloy T-shaped section ring piece |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115608891A (en) * | 2022-09-30 | 2023-01-17 | 中南大学 | Method and device for manufacturing special-shaped section transition ring of rocket tank |
| CN115608891B (en) * | 2022-09-30 | 2023-07-11 | 中南大学 | Manufacturing method and device for transition ring with special-shaped section of rocket storage tank |
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