CN112059084A - Method for forming Y-shaped cylindrical titanium alloy revolving body - Google Patents
Method for forming Y-shaped cylindrical titanium alloy revolving body Download PDFInfo
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- CN112059084A CN112059084A CN202010785579.2A CN202010785579A CN112059084A CN 112059084 A CN112059084 A CN 112059084A CN 202010785579 A CN202010785579 A CN 202010785579A CN 112059084 A CN112059084 A CN 112059084A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J3/00—Lubricating during forging or pressing
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Abstract
The embodiment of the invention provides a method for forming a Y-shaped cylindrical revolving body of a titanium alloy, which comprises the following steps: the method comprises the following steps of preparing a blank, forging a titanium alloy bar into a step-shaped blank, wherein the diameter of a first section of the step-shaped blank is equal to that of a first section of a Y-shaped cylindrical revolving body of the titanium alloy, the diameter of the first section of the step-shaped blank is matched with that of a first lower die cavity of a closed precision die forging die, and the length of the first lower die cavity is smaller than the height of the first lower die cavity; lubricating, namely coating a lubricant on the surface of the step-shaped blank and the upper die; and (3) precision die forging, namely forging the step-shaped blank for multiple times to form the titanium alloy Y-shaped cylindrical revolving body. The method for forming the titanium alloy Y-shaped cylindrical revolving body provided by the embodiment of the invention reduces the upsetting deformation, solves the problem that the titanium alloy Y-shaped cylindrical revolving body is easy to crack during forging with a large upsetting ratio, adopts multi-fire forging, reduces the punching depth of an upper die at each time, effectively avoids the phenomenon that a step-shaped blank locks the upper die, and becomes a new method for producing the titanium alloy Y-shaped cylindrical revolving body.
Description
Technical Field
The invention relates to the technical field of titanium alloy forging, in particular to a method for forming a Y-shaped cylindrical revolving body of a titanium alloy.
Background
The titanium alloy nozzle shell is an important part of aerospace equipment, and the products are widely applied to the fields of aviation and aerospace, but because the titanium alloy belongs to rare metal materials which are difficult to process, the problem of forming the products is a technical problem faced by many manufacturers at present. Currently there are mainly four methods to produce this class of products:
the first method is to directly machine large-sized bars, and the products produced by the method have the defects of low material utilization rate, high production cost and the like, and the product performance is lower because the product streamline is cut off in the mechanical machining process.
The second method is to adopt casting technology for production, and the parts produced by the method can only be used in occasions with lower use requirements due to the problems of more casting defects, low mechanical property and the like, and are difficult to meet the higher performance requirements in the fields of aviation and aerospace.
The third method is the production of the reverse extrusion molding technology of an extruder, which belongs to a one-shot molding mode, wherein the deformation process is static pressure molding, the lower die cavity and the upper die are always contacted with hot blanks in the whole molding process, so that the surface temperature of the blanks is reduced sharply, the titanium alloy has the characteristic of die sticking, and if the lubricating condition is not good, the product is scrapped because the cracks exceed the processing allowance too deep. And the product has larger size in the length direction, the TC11 titanium alloy is easy to crack when extruded, if an extrusion forming mode is adopted, the problem that the product is cracked and cannot be overhauled is caused, and the product percent of pass is lower.
The fourth method adopts forging forming technology to produce, and the products produced by the method have the advantages of excellent mechanical property, reasonable streamline distribution and the like. Although the method can meet the use requirements of aviation and aerospace products. However, the method also has some technical difficulties:
the die forging mode has the defects that the burrs are generated, the redundant burrs need to be cut by edge cutting equipment, material waste exists to a certain degree, the transverse burrs are generated on the forged piece of the type, and the requirement on the tonnage of the equipment is high.
Secondly, the TC11 titanium alloy is easy to generate surface cracks when die forging with large upsetting ratio, and the quality of the forged piece is influenced.
And thirdly, in the die forging process, because the titanium alloy has the characteristic of die sticking, if the lubricating condition is not good, cracks are easily generated inside and outside the product.
Fourthly, when the forging piece is forged, because the upper die penetrates into the lower die cavity, the blank is easy to lock the upper die, so that the demoulding is difficult, and even the blank is scrapped or the upper die is damaged.
Disclosure of Invention
The embodiment of the invention provides a method for forming a titanium alloy Y-shaped cylindrical revolving body, which is used for solving the defects that the surface of the titanium alloy Y-shaped cylindrical revolving body is easy to crack and difficult to demould in a large upsetting ratio in the prior art.
The embodiment of the invention provides a method for forming a Y-shaped cylindrical revolving body of a titanium alloy, which comprises the following steps: the method comprises the following steps of preparing a blank, forging a titanium alloy bar into a step-shaped blank, wherein the diameter of a first section of the step-shaped blank is equal to that of a first section of a Y-shaped cylindrical revolving body of the titanium alloy, the diameter of the first section of the step-shaped blank is matched with that of a first lower die cavity of a closed precision die forging die, and the length of the first section of the step-shaped blank is smaller than the height of the first lower die cavity; lubricating, namely coating a lubricant on the surface of the step-shaped blank and the upper die; and (3) precision die forging, namely forging the step-shaped blank for multiple times to form the titanium alloy Y-shaped cylindrical revolving body.
According to the forming method of the titanium alloy Y-shaped cylindrical revolving body of one embodiment of the invention, the blank making step further comprises the following steps: and pressing the titanium alloy bar stock to be divided by using a shoulder clamping throwing device, and drawing out the titanium alloy bar stock to form the step-shaped blank by using a shaping throwing device.
According to one embodiment of the invention, the method for forming a titanium alloy Y-shaped cylindrical rotator further comprises the following steps after the step of making a blank: and grinding and finishing the surface of the step-shaped blank, and grinding the transition part of the first section and the second section of the step-shaped blank to enable the step-shaped blank to be in smooth transition.
The method for forming a titanium alloy Y-shaped cylindrical rotator according to one embodiment of the present invention further includes: and heating the titanium alloy bar stock and the step-shaped blank to 40-60 ℃ below the transformation point.
According to one embodiment of the invention, the method for forming a Y-shaped cylindrical rotator of titanium alloy further comprises, before the step of precision die forging: and preheating the closed precision die forging die.
According to the method for forming a Y-shaped cylindrical rotor of titanium alloy according to an embodiment of the present invention, the precision forging step further includes: placing the step-shaped blank centrally in a lower die cavity of the closed precision forging die; the upper die moves downwards and is punched into the step-shaped blank; and the upper die moves upwards to be separated from the step-shaped blank.
The method for forming a titanium alloy Y-shaped cylindrical rotator according to one embodiment of the present invention further includes: when the punching depth of the upper die is 50-70mm, the upper die stops punching and starts to move upwards to be separated from the unformed blank.
The method for forming a titanium alloy Y-shaped cylindrical rotator according to one embodiment of the present invention further includes: coating a lubricant on the surface of the unformed blank and the upper die; heating the unformed blank; and placing the unformed blank in the middle of the lower die cavity of the closed precision die forging die again for forming.
The method for forming a titanium alloy Y-shaped cylindrical rotator according to one embodiment of the present invention further includes: repeating the steps until the unformed blank is forged into the Y-shaped cylindrical rotator.
According to the forming method of the titanium alloy Y-shaped cylindrical rotary body of one embodiment of the invention, before coating lubricant on the surface of the unformed blank, the method further comprises the following steps: and polishing the forging defects on the surface of the unformed blank.
According to the forming method of the titanium alloy Y-shaped cylinder revolving body provided by the embodiment of the invention, after the step-shaped blank is prepared, local upsetting is carried out in the closed type precision die forging die, the upsetting deformation is reduced, the problem that the titanium alloy Y-shaped cylinder revolving body is easy to crack during forging with a large upsetting ratio is solved, the depth of stamping of the upper die at each time is reduced by adopting multi-fire forging, the phenomenon that the step-shaped blank locks the upper die is effectively avoided, the technical problem in the forging process in the prior art is overcome, and the forming method becomes a new method for producing the titanium alloy Y-shaped cylinder revolving body.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flowchart of a method for forming a Y-shaped cylindrical rotor of titanium alloy according to an embodiment of the present invention;
FIG. 2 is a drawing of a forging of a titanium alloy Y-shaped cylindrical rotary body according to an embodiment of the invention;
FIG. 3 is a material distribution diagram of a titanium alloy bar material pressing shoulder;
FIG. 4 is a view of a titanium alloy stepped blank;
FIG. 5 is a front view of the shoulder catcher;
FIG. 6 is a top view of the clip shoulder catcher;
FIG. 7 is a front view of the reforming throw;
fig. 8 is a schematic structural view of a closed precision forging die.
Reference numerals:
1: a titanium alloy Y-shaped cylindrical rotator; 2: clamping the shoulder throwing piece; 3: shaping and throwing; 4: closed precision die forging die; 10: step-shaped blanks; 11: a first stage; 12: a second stage; 31: an upper throwing device; 32, falling the seeds; 41: an upper die; 42: a lower die; 421: a first lower mold cavity; 422: a second lower mold cavity; s01, S02, S03: and (4) carrying out the steps.
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, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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 method for forming a titanium alloy Y-shaped cylindrical rotor according to the embodiment of the present invention will be described below with reference to fig. 1 to 8.
Titanium alloy is widely applied to the fields of aviation and aerospace due to the characteristics of high strength, good corrosion resistance, high heat resistance and the like, but the titanium alloy is extremely easy to crack in the forging process, so that great difficulty is increased for the forging production process.
The specific shape of the Y-shaped cylindrical rotator 1 is: the flange is a conical cylindrical part, the diameter of the flange is larger than 2 times of the diameter of the rod part, the flange is irregular in shape and large in forging difficulty, the Y-shaped cylindrical revolving body 1 is made of titanium alloy, specifically TC11 titanium alloy, and the titanium alloy is extremely prone to cracking in the upsetting process, so that the size of a forged piece cannot meet the machining requirement and is scrapped. Because its flange diameter of this Y shape drum solid of revolution 1 is greater than pole portion diameter, adopts conventional drawing process production, because pole portion diameter is less, the length that needs during the branch material is difficult to satisfy minimum number seal length, draws long under this kind of condition, must lead to pole portion terminal surface indent, forms the terminal surface and folds or the crackle, and influences product quality. The flange is formed by adopting a large upsetting ratio, so that the flange is cracked during upsetting, and the production difficulty coefficient is large.
As shown in fig. 1 to 6, an embodiment of the present invention provides a method for forming a titanium alloy Y-shaped cylindrical rotator, including: and (3) blank making, namely heating the titanium alloy bar to 40-60 ℃ below the transformation point, preserving heat for a certain time, and forging the titanium alloy bar into a step-shaped blank 10 on free forging equipment.
Specifically, the stepped blank 10 includes a first section 11 and a second section 12, wherein the diameter of the second section 12 is larger than that of the first section 11, and the diameter of the second section 12 is smaller than that of a second lower cavity 422 of a lower die 42 of the closed precision forging die 4, and the length is larger than the height of the second lower cavity 422; the diameter of the first segment 11 matches the diameter of the first lower mold cavity 421, and the length of the first segment 11 is smaller than the height of the first lower mold cavity 421. Further, the diameter of the first section 11 can be smaller than the diameter of the first lower die cavity 421 by 1-2mm, and the diameter of the first section 11 is equal to the diameter of the first section 11 of the formed titanium alloy Y-shaped cylindrical revolving body 1, that is, in the free forging blank making process, the first section 11 of the titanium alloy Y-shaped cylindrical revolving body 1 is formed, and the second section 12 of the titanium alloy Y-shaped cylindrical revolving body 1 is formed in the precision die forging process.
Specifically, the diameter of the second section 12 of the stepped blank 10 is calculated on the basis of the minimum mark length of the first section 11, so that the end of the first section 11 is not recessed during the drawing process, and the end is prevented from being folded or cracked.
In an embodiment of the invention, the diameter of the second section 12 of the stepped blank 10 is different from the diameter of the second section 12 of the titanium alloy Y-shaped cylindrical revolving body 1 by 52mm, and the unilateral deformation is 26mm, because the diameter of the second section 12 of the stepped blank 10 is smaller than the diameter of the second section 12 of the titanium alloy Y-shaped cylindrical revolving body 1, the upsetting ratio of the second section 12 of the titanium alloy Y-shaped cylindrical revolving body 1 during forming is reduced, and the problem that the forming surface of the titanium alloy Y-shaped cylindrical revolving body 1 is easy to crack due to the large upsetting ratio is effectively avoided.
Further, the particular diameter of the second section 12 of the stepped blank 10 may be set according to the particular forging size to be formed, without in any way limiting the scope of the invention as defined by one embodiment.
After blanking, in order to prevent the upper die 41 from being locked by the stepped blank 10 during the stamping process, a lubricant is applied to the surface of the prefabricated stepped blank 10 and the upper die 41. Specifically, a glass lubricant is applied to the surface of the prefabricated stepped blank 10, and a graphite lubricant is applied to the upper die 41.
After the step-shaped blank 10 is prepared, the step-shaped blank 10 is heated. After the step-shaped blank 10 is taken out of the furnace, the step-shaped blank 10 is placed in the lower die 42 of the closed precision forging die 4, the upper die 41 is closed, the upper die 41 presses the upper surface of the step-shaped blank 10, the step-shaped blank 10 is deformed under pressure, and the metal flows into the second lower die cavity 422. In order to prevent the stepped blank 10 from locking the upper die 41 and causing difficulty in the mold release, the upper die 41 is removed after the upper die 41 is pressed down a certain distance, and the stepped blank 10 is released. And after reheating, repeating the precision die forging for a plurality of times until the second section 12 of the step-shaped blank 10 is completely filled in the second lower die cavity 422, and forming the titanium alloy Y-shaped cylindrical revolving body 1.
According to the method for forming the Y-shaped titanium alloy cylinder revolving body provided by the embodiment of the invention, the upsetting deformation is reduced by partially upsetting in the closed precision die forging die after the step-shaped blank is prepared, the problem that the Y-shaped titanium alloy cylinder revolving body is easy to crack during forging with a large upsetting ratio is solved, the depth of stamping of an upper die at each time is reduced by adopting the lubricant coating and multi-fire forging, the phenomenon that the upper die is locked by the step-shaped blank is effectively avoided, the technical problem in the forging process in the prior art is overcome, and the method becomes a new method for producing the Y-shaped titanium alloy cylinder revolving body.
In one embodiment of the present invention, the step of making the blank of the titanium alloy Y-shaped cylindrical rotator 1 further comprises: and pressing the titanium alloy bar material to be divided by using a shoulder clamp 2. In order to reduce the production cost and realize precision forging, the shoulder clamping thrower 2 is adopted to calculate the lengths of the titanium alloy bars required by the first section 11 and the second section 12 of the titanium alloy Y-shaped cylindrical revolving body 1 formed by the titanium alloy bars according to the principle that the volume is not changed and the burning loss is considered, and the shoulder clamping thrower 2 is used for distributing the materials after calculation, so that accurate blanking and accurate material distribution can be realized, and the flash-free precision die forging can be realized, thereby shortening the machining working hours, reducing the tool abrasion and reducing the production cost.
After the material is distributed by pressing the shoulder, a shaping falling piece 3 is adopted to draw out the first section 11 and the second section 12 of the titanium alloy bar material to the size corresponding to each section of the step-shaped blank 10. The diameter of the first section 11 is the size corresponding to the first section 11 of the titanium alloy Y-shaped cylindrical revolving body 1, and the size is 1-2mm smaller than the diameter of the first lower mold cavity 421, so that the first section 11 of the step-shaped blank 10 can be placed into the first lower mold cavity 421, and the length of the first section 11 is smaller than the length of the first lower mold cavity 421. The diameter of the second section 12 is smaller than the diameter of the second section 12 of the titanium alloy Y-shaped cylindrical revolving body 1, and the length is larger than the length of the second section of the titanium alloy Y-shaped cylindrical revolving body 1, so that the second section 12 of the stepped blank 10 is formed into the shape of the second section 12 of the titanium alloy Y-shaped cylindrical revolving body 1 after upsetting deformation.
As shown in fig. 7, the shaping breaker 3 includes an upper breaker 31 and a lower breaker 32, which are shaped like a circular arc breaker. Because the shaping breaker 3 is arc-shaped in the drawing process, in the forging process, the titanium alloy bar bears three-dimensional compressive stress, the drawing efficiency of the titanium alloy bar is improved, and meanwhile, the problem that surface cracks are easily generated on the surface of the bar is avoided, meanwhile, the coaxiality of the first section 11 and the second section 12 of the step-shaped blank 10 is ensured in the forging process, if the eccentricity between the first section 11 and the second section 12 is found, the correction is carried out in time, so that after the first section 11 and the second section 12 are eccentric, the phenomenon that the second lower die cavity 422 is partially flapped and partially not filled fully is avoided in the precision forging process.
Further, the surface of the stepped blank 10 is finished by grinding after the stepped blank 10 is formed, specifically, the surface of the stepped blank 10 is finished by grinding, for example, folds and fine cracks generated on the surface. Meanwhile, the transition part of the first section 11 and the second section 12 of the step-shaped blank 10 is polished to enable the transition part to be in circular arc transition, so that crack extension or crack caused by sharp corners in the forging process due to surface folding or surface cracks or sharp corners at the transition part of the first section 11 and the second section 12 in the subsequent precision die forging process is avoided, and the formed titanium alloy Y-shaped cylindrical revolving body 1 is scrapped due to the fact that the size requirement is not met.
In one embodiment of the invention, the titanium alloy bar stock and the stepped blank 10 are heated to a temperature of 40-60 ℃ below the transformation point. Specifically, the heating temperature is 950-.
Further, before the step-shaped blank 10 is fed into the closed precision forging, the closed precision forging die 4 is preheated, and specifically, the closed precision forging die 4 may be preheated by an object having a temperature such as a baking iron or a stub bar, and the preheated temperature is more than 200 ℃.
As shown in fig. 8, in one embodiment of the present invention, the precision swaging specifically comprises: the step-shaped blank 10 is placed in the lower die cavity of the closed precision die forging 4 in the center, and the step-shaped blank 10 can be ensured to be placed in the lower die cavity in the center because the diameter of the first section 11 of the step-shaped blank 10 is smaller than the diameter of the first lower die cavity 421.
The upper die 41 moves downwards to punch into the step-shaped blank 10, the metal of the second section 12 of the extrusion step-shaped blank 10 flows towards the inner wall of the second lower die cavity 422, when the punching depth of the upper die 41 is 50-70mm, the upper die 41 stops punching and starts moving upwards to be separated from the unformed blank. Because the upper die 41 has a larger draft angle and air exists between the step-shaped blank 10 and the upper die 41, the step-shaped blank 10 can be effectively prevented from locking the upper die 41 in the die forging process, so that the upper die 41 is easy to demold.
Alternatively, in one embodiment of the present invention, the draft angle of the upper die 41 is 5 °.
Further, after the unformed blank is cooled, the folds or cracks on the surface of the unformed blank are polished, after the folds or cracks are polished clean, the surface of the unformed blank is coated with a glass lubricant, a graphite lubricant is coated on an upper die, then the unformed blank is heated, after a certain time of heat preservation, the unformed blank is placed in a lower die cavity again, precision die forging is carried out, and the above operation method is repeated until the stepped blank 10 is completely formed into the titanium alloy Y-shaped revolving body cylinder 1.
The forming method of the titanium alloy Y-shaped cylindrical revolving body provided by the embodiment of the invention realizes flash-free forging, solves the problem that the forged piece is easy to lock after the upper die 41 is punched down by coating a lubricant and adopting a forging method with multiple fire times and small reduction, and simultaneously reduces the surface cracks of the forged piece by the small reduction, thereby providing technical support for successfully producing the titanium alloy Y-shaped cylindrical revolving body.
The method for forming a titanium alloy Y-shaped cylindrical rotor according to the embodiment of the present invention will be described in detail below.
Firstly, heating a titanium alloy bar to 950-.
And (3) polishing the surface of the step-shaped blank 10 to clean surface defects, and polishing the transition part between the first section 11 and the second section 12 of the step-shaped blank 10 to enable the transition part to be smoothly transited. The surface of the stepped blank 10 is coated with a glass lubricant and the upper die 41 is coated with a graphite lubricant. Putting the step-shaped blank 10 into a furnace for heating, wherein the heating temperature is as follows: to 950 and 980 ℃, and simultaneously preheating the closed precision forging die 4.
After the step-shaped blank 10 is taken out of the furnace, the first section 11 of the step-shaped blank 10 is placed in the first lower die cavity 421 of the closed precision die forging die 4, the upper die 41 moves downwards and is punched into the step-shaped blank 10, and when the punching depth of the upper die 41 is 50-70mm, the upper die 41 stops punching and starts moving upwards to be separated from the unformed blank.
After the unformed blank is cooled, the folds or cracks on the surface of the unformed blank are polished, after the folds or cracks are polished clean, the surface of the unformed blank is coated with a glass lubricant, an upper die 41 is coated with a graphite lubricant, then the unformed blank is heated, after heat preservation for a certain time, the unformed blank is placed in a lower die cavity again, precision die forging is carried out, and the above operation method is repeated until the stepped blank 10 is completely formed into the titanium alloy Y-shaped cylindrical revolving body 1.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A method for forming a Y-shaped cylindrical rotator made of titanium alloy is characterized by comprising the following steps:
the method comprises the following steps of preparing a blank, forging a titanium alloy bar into a step-shaped blank, wherein the diameter of a first section of the step-shaped blank is equal to that of a first section of a Y-shaped cylindrical revolving body of the titanium alloy, the diameter of the first section of the step-shaped blank is matched with that of a first lower die cavity of a closed precision die forging die, and the length of the first section of the step-shaped blank is smaller than the height of the first lower die cavity;
lubricating, namely coating a lubricant on the surface of the step-shaped blank and the upper die;
and (3) precision die forging, namely forging the step-shaped blank for multiple times to form the titanium alloy Y-shaped cylindrical revolving body.
2. The method of forming a titanium alloy Y-shaped cylindrical rotor according to claim 1, wherein said step of blanking further comprises:
and pressing the titanium alloy bar stock to be divided by using a shoulder clamping throwing device, and drawing out the titanium alloy bar stock to form the step-shaped blank by using a shaping throwing device.
3. The method of forming a titanium alloy Y-shaped cylindrical rotor according to claim 1 or 2, further comprising, after the step of blanking: and grinding and finishing the surface of the step-shaped blank, and grinding the transition part of the first section and the second section of the step-shaped blank to enable the step-shaped blank to be in smooth transition.
4. The method of molding a titanium alloy Y-shaped cylindrical rotor according to claim 1, further comprising: and heating the titanium alloy bar stock and the step-shaped blank to 40-60 ℃ below the transformation point.
5. The method of molding a titanium alloy Y-shaped cylindrical rotor according to claim 1, further comprising, before said step of precision swaging: and preheating the closed precision die forging die.
6. The method of forming a titanium alloy Y-shaped cylindrical rotor according to claim 5, wherein said precision swaging step further comprises:
placing the step-shaped blank centrally in a lower die cavity of the closed precision forging die;
the upper die moves downwards and is punched into the step-shaped blank;
and the upper die moves upwards to be separated from the step-shaped blank.
7. The method of molding a titanium alloy Y-shaped cylindrical rotor according to claim 6, further comprising:
when the punching depth of the upper die is 50-70mm, the upper die stops punching and starts to move upwards to be separated from the unformed blank.
8. The method of molding a titanium alloy Y-shaped cylindrical rotor according to claim 7, further comprising:
coating a lubricant on the surface of the unformed blank and the upper die;
heating the unformed blank;
and placing the unformed blank in the middle of the lower die cavity of the closed precision die forging die again for forming.
9. The method of molding a titanium alloy Y-shaped cylindrical rotor according to claim 8, further comprising: repeating the steps until the unformed blank is forged into the Y-shaped cylindrical rotator.
10. The method of forming a titanium alloy Y-shaped cylindrical rotor according to claim 8, further comprising, each time before applying a lubricant to the surface of the unformed material: and polishing the forging defects on the surface of the unformed blank.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113145681A (en) * | 2021-03-03 | 2021-07-23 | 景德镇明兴航空锻压有限公司 | Forging method of titanium alloy bar |
| CN114101555A (en) * | 2021-09-30 | 2022-03-01 | 贵州大学 | A high-strength and toughness titanium alloy precision forging die forging surface processing technology |
| CN114260403A (en) * | 2021-12-21 | 2022-04-01 | 中国第二重型机械集团德阳万航模锻有限责任公司 | Forging method for performance direction uniformity of basin-shaped aluminum alloy die forging |
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