CN117283304A - Superplastic forming die and using method thereof - Google Patents
Superplastic forming die and using method thereof Download PDFInfo
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- CN117283304A CN117283304A CN202311289453.6A CN202311289453A CN117283304A CN 117283304 A CN117283304 A CN 117283304A CN 202311289453 A CN202311289453 A CN 202311289453A CN 117283304 A CN117283304 A CN 117283304A
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- 238000000034 method Methods 0.000 title claims abstract description 64
- 230000008569 process Effects 0.000 claims abstract description 53
- 238000009792 diffusion process Methods 0.000 claims abstract description 26
- 238000003466 welding Methods 0.000 claims abstract description 14
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 40
- 229910052786 argon Inorganic materials 0.000 claims description 20
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000007664 blowing Methods 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000003698 laser cutting Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 10
- 239000000047 product Substances 0.000 description 8
- 238000007789 sealing Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 229910000679 solder Inorganic materials 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 208000016261 weight loss Diseases 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000013585 weight reducing agent Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P23/00—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass
- B23P23/04—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass for both machining and other metal-working operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/16—Heating or cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Fluid Mechanics (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention relates to a superplastic forming die and a using method thereof, wherein the superplastic forming die comprises an upper die and a lower die, an inner groove for forming is concavely arranged on the upper die, the upper die corresponds to the lower die, and a part plate is clamped in the middle when the upper die and the lower die are closed; the inner groove is provided with a plurality of upper air holes, the upper air holes are communicated with an upper vent pipe, one end of the upper vent pipe penetrates into the upper mold, the other end of the upper vent pipe is arranged outside the upper mold, the lower mold is provided with a lower air hole, the lower air hole is communicated with the lower vent pipe, and the first section of the lower vent pipe penetrates into the lower mold. In the invention, the process plate is added, so that the process plate, the part upper plate and the part lower plate form a seal, the seal cannot be realized between the process plate and the part lower plate because the part upper plate is engraved with a weight-reducing shape, namely a marking area, a seal cavity is formed at the edge of the process plate and the part lower plate through welding, the part upper plate is clamped in the middle to form a diffusion connection seal, and the diffusion connection is ensured to be carried out through vacuumizing.
Description
Technical Field
The invention relates to the field of manufacturing, in particular to a superplastic forming die and a using method thereof.
Background
The superplastic forming technology, in particular to the superplastic air-inflation forming technology, is a novel and advanced immature technology, has the advantages of good performance, high precision, simple working procedure, convenient operation and the like, and saves energy and equipment while ensuring the quality of products. Superplastic forming can be used for cabin parts of aircraft skins or missiles in aerospace.
In the prior art, the chemical milling is adopted, the process is complex, the period is long, the cost is high, and the accuracy and the controllability are poor.
Disclosure of Invention
In view of the above, the present invention aims to provide a superplastic forming mold and a using method thereof, so as to solve the problems of reducing the manufacturing process difficulty, cost and cycle in the prior art.
In order to achieve the above purpose, the technical scheme of the invention is realized as follows:
the superplastic forming die comprises an upper die and a lower die, wherein an inner groove for forming is concavely arranged on the upper die, the upper die corresponds to the lower die, and a part plate is clamped in the middle when the upper die and the lower die are closed;
the inner groove is provided with a plurality of upper air holes, the upper air holes are communicated with an upper vent pipe, one end of the upper vent pipe penetrates into the upper die, the other end of the upper vent pipe is arranged outside the upper die, the lower die is provided with a lower air hole, the lower air hole is communicated with the lower vent pipe, a first section of the lower vent pipe penetrates into the lower die, and the other end of the lower vent pipe is arranged outside the lower die;
a grid groove is formed in one side of the upper die, which is provided with the inner groove;
the part plate comprises a process plate, a part upper plate and a part lower plate, wherein the process plate is tightly attached to the upper die, the part lower plate is tightly attached to the lower die, the part upper plate is arranged between the process plate and the part lower plate, a marking area is arranged on the part upper plate, a groove is formed in the part lower plate, the groove is communicated with an air inlet pipe, and the end part of the air inlet pipe is connected with the part upper plate and the part lower plate.
Further, lifting lugs are arranged on the side walls of the upper die and the lower die.
Furthermore, a locating pin is fixedly arranged on one side of the lower die corresponding to the upper die, and a locating hole matched with the locating pin is formed in the lower die.
Furthermore, the left side wall and the right side wall of the lower die are fixedly provided with connecting positioning pins, and the part lower plate is provided with connecting holes matched with the connecting pins.
Further, mounting holes for mounting thermocouples are formed in the upper die and the lower die.
A method of using a superplastic forming die, the method comprising the steps of:
step 1: assembling the welded assembly with the upper die and the lower die by sequentially assembling the process plate, the part upper plate and the part lower plate;
step 2: vacuumizing the air inlet pipe, heating the die, and continuously blowing argon into the upper air holes and the lower air holes of the upper die and the lower die;
step 3: heating to 860-940 deg.c for diffusion welding to drive the upper mold to apply pressure to the lower mold and to blow argon into the upper air hole of the upper mold;
step 4: after diffusion welding is finished, performing superplastic forming, wherein the superplastic forming temperature is 880-940 ℃, firstly, deflating an upper die and a lower die through an upper air hole and a lower air hole, vacuumizing instead, and filling argon into an air inlet pipe;
step 5: the temperature of the die is reduced to 500 ℃, the upper die is not applied with pressure, the temperature is reduced, and the workpiece is taken out;
step 6: cleaning the back of the finished product by adopting a stainless steel brush, cutting off the redundant part of the part plate by adopting laser cutting, removing the process plate, and removing the mark area of the part upper plate;
step 7: and the position where the combined part upper plate and the combined part lower plate are connected with the air inlet pipe is plugged by adopting argon arc welding.
Further, the pressure of the argon blown into the upper air hole of the upper die in the step is smaller than the pressure applied by the upper die.
Compared with the prior art, the invention has the following advantages:
in the invention, the process plate is added, so that the process plate, the part upper plate and the part lower plate form a seal, the seal cannot be realized between the part upper plate and the part lower plate because the part upper plate is engraved with a weight-reducing shape, namely a marking area, the part upper plate and the part lower plate are clamped in the middle to form a seal cavity, the inside is ensured not to be oxidized through vacuumizing, diffusion connection sealing is completed, and the diffusion connection is ensured to be carried out through vacuumizing. And during diffusion connection, a sealing cavity is formed by the sealing edge stems of the upper die and the lower die and the part plate, and argon gas filled in the upper die pressurizes the lower die on the upper surface of the process plate to realize diffusion connection.
The invention optimally designs the lower die, and adds the lower air holes, so as to protect the back of the part plate and prevent oxidation in the heating process. The special process of rough, time-consuming, pollution-consuming and complex is solved by adding the process means of the cheap process plate, the process difficulty is reduced, the manufacturing route is simplified, the manufacturing cost is reduced, and the product precision is improved. The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic diagram of a combination of an upper and lower die plate of the present invention;
FIG. 3 is a schematic illustration of a part plate structure of the present invention;
FIG. 4 is a schematic view of the structure of the component plate and air inlet pipe of the present invention;
FIG. 5 is a schematic view of the assembly of the component plates of the present invention;
FIG. 6 is a schematic view of the upper plate structure of the component of the present invention;
FIG. 7 is a schematic view of the lower plate structure of the part of the present invention;
FIG. 8 is a schematic structural view of an upper mold according to the present invention;
FIG. 9 is a schematic view of the structure of the lower mold of the present invention;
FIG. 10 is a schematic diagram of the temperature ramp up stage of the present invention;
FIG. 11 is a schematic diagram of a diffusion bonding stage according to the present invention;
FIG. 12 is a schematic diagram of the superplastic forming stage of the present invention;
FIG. 13 is a schematic illustration of a finished part board of the present invention;
FIG. 14 is a schematic view of a finished removal process plate of the present invention;
FIG. 15 is a schematic view of a finished removal mark area of the present invention.
Reference numerals illustrate:
1. a process plate;
2. part upper plate; 201. A marking area;
3. a part lower plate; 301. Slotting;
4. an air inlet pipe;
5. a lower die; 501. a positioning pin; 502. a connecting pin; 503. a lower air hole;
6. an upper die; 601. an inner tank; 602. an upper air hole; 603. grid grooves;
7. lifting lugs;
8. repairing the reference hole;
9. an upper vent pipe;
10. a lower vent pipe;
11. and (5) mounting holes.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
In the description of the present invention, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", "inner", "back", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, in the description of the present invention, the terms "mounted," "connected," and "connected," are to be construed broadly, unless otherwise specifically defined. For example, the connection can be fixed connection, detachable connection or integrated connection; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in combination with specific cases.
The present invention will be described in detail below with reference to fig. 1 to 15 in conjunction with the embodiments.
In general, the present invention relates to a superplastic forming mold, which includes an upper mold 6 and a lower mold 5, as shown in fig. 1 to 4, an inner groove 601 for forming is concavely provided on the upper mold 6, the upper mold 6 and the lower mold 5 correspond to each other, and a part plate is clamped therebetween when the upper mold 6 and the lower mold 5 are closed. Wherein, the inner groove 601 is provided with a plurality of upper air holes 602, the upper air holes 602 are communicated with the upper air pipe 9, one end of the upper air pipe 9 penetrates into the upper die 6, the other end of the upper air pipe is outside the upper die 6, the lower die 5 is provided with a lower air hole 503, the lower air hole 503 is communicated with the lower air pipe 10, the first section of the lower air pipe 10 penetrates into the lower die 5, and the other end of the lower air pipe is outside the lower die 5; a mesh groove 603 is formed in the side of the upper mold 6 where the inner groove 601 is formed.
In this embodiment, the inner groove 601 of the upper mold 6 is formed into a convex shape after superplastic forming, and the specific shape is more rigid, and is not limited herein. The upper gas holes 602 may facilitate the blowing or sucking of gas into or out of the upper mold 6, and the lower gas holes 503 may facilitate the blowing or sucking of gas into or out of the upper mold 6.
Grid grooves 603 ensure that a dense gas film is formed between the plate and the die during diffusion bonding to ensure diffusion bonding rate, and if the grid grooves 603 are not present, part of the area may be mechanically pressed by the die during diffusion bonding, resulting in no gas film in the individual area and diffusion bonding defects.
As shown in fig. 3 to 7, the above-mentioned part board includes a process board 1, a part upper board 2 and a part lower board 3, the process board 1 is tightly attached to an upper mold 6, the part lower board 3 is tightly attached to a lower mold 5, the part upper board 2 is between the process board 1 and the part lower board 3, a mark area 201 is provided on the part upper board 2, a slot 301 is provided on the part lower board 3, the slot 301 is communicated with an air inlet pipe 4, and the end of the air inlet pipe 4 is connected with the part upper board 2 and the part lower board 3.
It will be appreciated that the feature plate is a superplastic formed stock material and that in actual operation, as shown in figures 8 and 9, the process plate 1 may be scored for alignment. The final product is formed by combining the part upper plate 2 and the part lower plate 3, the process plate 1 plays a role in auxiliary alignment, and in the concrete implementation, in order to prevent the process plate 1 from being welded with the finished product, the surface of the process plate 1, which is contacted with the part upper plate 2, is brushed with a solder resist.
The upper plate 2 of the part and the process plate 1 are welded by adopting electron beam or laser welding, so that the process plate 1 is convenient to detach at last while the sealing is required to be ensured, and in addition, the connection of the process plate 1 cannot be influenced by the solder resist on the process plate 1. The part upper plate 2 and the part lower plate 3 are contacted with the solder stop agent at the position of the marking area 201, the marking area 201 is a weight reduction area and a superplastic forming area, and the weight reduction area is a last mechanically removed area, so that the subsequent removal can be facilitated. The part upper plate 2 is contacted with the part lower plate 3 and the position corresponding to the inner groove 601 of the upper mold 6 is also brushed with the solder resist, so that the forming of the part can be facilitated.
The slot 301 of the lower part plate 3 is also brushed with a flux, and in a specific implementation, the flux can prevent the slot 301 from being welded with the upper part plate 2, the slot 301 can vacuumize between the upper part plate 2 and the lower part plate 3 in a diffusion connection stage, and in a forming process, the slot 301 can blow argon into a cavity formed by the upper part plate 2 corresponding to the inner groove 601. In actual operation, the air inlet pipe 4 is detachably connected with the slot 301, the slot 301 is arranged according to different parts, and it should be noted that the formed cavity needs to be communicated when the slot 301 is arranged.
It should be further noted that, for convenience of installation and debugging, the mold may be installed into the tightening fixture during assembly.
In order to facilitate the mounting and fixing of the molds, in the present embodiment, as shown in fig. 8 and 9, lugs 7 are provided on the side walls of both the upper mold 6 and the lower mold 5.
As a preferable structure of the present embodiment, the upper die 6 and the lower die 5 are provided with repair reference holes 8 for references at the time of repair processing.
In actual operation, the upper mold 6 and the lower mold 5 need to be installed and closed, so as to facilitate the installation and closing of the upper mold 6 and the lower mold 5, in this embodiment, a positioning pin 501 is fixedly disposed on a side of the lower mold 5 corresponding to the upper mold 6, and a positioning hole matched with the positioning pin 501 is disposed on the lower mold 5.
In order to facilitate the mounting and positioning of the component plate, in this embodiment, as shown in fig. 8 and 9, the left and right side walls of the lower mold 5 are fixedly provided with connection pins 502, and the component lower plate 3 is provided with connection holes that mate with the connection pins 502. The component plate is placed on the lower die 5, and the connection pins 502 and the connection holes fix the component plate in place.
Because the die is to work under the condition of heating, in order to facilitate the monitoring of the temperature of the die, the upper die 6 and the lower die 5 are provided with mounting holes 11 for mounting thermocouples.
The upper die 6 and the lower die 5 sandwich one side of the part plate, and are provided with sealing beads for diffusion connection sealing.
As another aspect of the present invention, the present invention proposes a method for using a superplastic forming mold, specifically as shown in fig. 10 to 15, as follows:
step 1: assembling the welded components of the process plate 1, the part upper plate 2 and the part lower plate 3 with an upper die 6 and a lower die 5 in sequence;
step 2: vacuumizing the air inlet pipe 4, heating the die, and continuously blowing argon into the positions of the upper air holes 602 and the lower air holes 503 of the upper die 6 and the lower die 5; argon is blown through the air passage to protect the surface of the product from oxidation.
Step 3: heating to 860-940 deg.c for diffusion welding to force the upper mold 6 to apply pressure to the lower mold 5 and to blow argon into the upper air holes 602 of the upper mold 6; this process is a stage of diffusion welding, and the purpose is to perform diffusion welding in the area where no flux is present, and after a certain time, the diffusion welding is completed.
Step 4: after diffusion welding is finished, performing superplastic forming, wherein the superplastic forming temperature is 880-940 ℃, firstly, deflating the upper die 6 and the lower die 5 through the upper air hole 602 and the lower air hole 503, vacuumizing instead, and filling argon into the air inlet pipe 4; the argon filling is carried out according to different process curves, the upper die 6 and the lower die 5 are required to be vacuumized instead of being cracked due to the fact that if the air exists in the cavity of the die in the process, the superplastic forming process is not thorough, and the part upper plate 2 and the process plate 1 cannot be attached to each other due to the fact that the air exists in the die, so that the defect of a product can be caused, and the vacuum is required to be vacuumized; the pressure of the upper die 6 to the lower die 5 can be reduced according to the actual situation, and the pressure is reduced because the gas area is reduced and is not required to be large, and the gas holes are easily blocked due to the large pressure.
Step 5: the temperature of the die is lowered to 500 ℃, the upper die 6 is not applying pressure, the temperature is lowered, and the workpiece is taken out.
Step 6: cutting off redundant parts of the part plate by adopting laser cutting, removing the process plate 1, and removing the marking area 201 of the part upper plate 2; the marking zone 201 is a weight-loss zone.
Step 7: and the position where the combined part upper plate 2 and the part lower plate 3 are connected with the air inlet pipe 4 is plugged by adopting argon arc welding.
The pressure of the argon gas blown in step 3 is smaller than the pressure applied by the upper die 6.
Finally, the finished product is subjected to acid washing and alkali disintegration to remove the surface oxide skin.
In summary, the invention adds the process plate 1, so that the process plate 1, the part upper plate 2 and the part lower plate 3 form a seal (superplastic forming is necessary), and the seal cannot be realized between the part upper plate 2 and the part lower plate 3 because the part upper plate 2 is engraved with a weight-reducing shape, namely the marking area 201, the process plate 1 and the part lower plate 3 clamp the part upper plate 2 in the middle to form a seal cavity, the inside is ensured not to be oxidized by vacuumizing, diffusion connection is completed, and the diffusion connection is ensured to be carried out by vacuumizing.
In the diffusion connection process, a sealing cavity is formed by the upper die 6 and the part plate, and the upper surface of the process plate 1 is pressurized by argon filled in the upper die 6 to realize diffusion connection.
The invention optimally designs the lower die 5, and adds the lower air holes 503, so as to increase the temperature rising process to protect the back of the part plate and prevent oxidization.
By adding the process means of the process plate 1, the rough, time-consuming, pollution-consuming and complex special process of chemical milling is solved, the process difficulty is reduced, the manufacturing route is simplified, the manufacturing cost is reduced, and the product precision is improved.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (7)
1. The utility model provides a superplastic forming die which characterized in that:
the forming die comprises an upper die (6) and a lower die (5), an inner groove (601) for forming is concavely arranged on the upper die (6), the upper die (6) corresponds to the lower die (5), and the part plate is clamped in the middle when the upper die (6) and the lower die (5) are closed;
the inner groove (601) is provided with a plurality of upper air holes (602), the upper air holes (602) are communicated with an upper air pipe (9), one end of the upper air pipe (9) penetrates into the upper die (6), the other end of the upper air pipe is arranged outside the upper die (6), the lower die (5) is provided with a lower air hole (503), the lower air hole (503) is communicated with the lower air pipe (10), a first section of the lower air pipe (10) penetrates into the lower die (5), and the other end of the lower air pipe is arranged outside the lower die (5);
a grid groove (603) is formed in one side of the upper die (6) where the inner groove (601) is formed;
the part board comprises a process board (1), a part upper board (2) and a part lower board (3), wherein the process board (1) is tightly attached to an upper die (6), the part lower board (3) is tightly attached to a lower die (5), the part upper board (2) is arranged between the process board (1) and the part lower board (3), a marking area (201) is arranged on the part upper board (2), a slot (301) is arranged on the part lower board (3), the slot (301) is communicated with an air inlet pipe (4), and the end part of the air inlet pipe (4) is connected with the part upper board (2) and the part lower board (3).
2. The superplastic forming die as set forth in claim 1, wherein:
lifting lugs (7) are arranged on the side walls of the upper die (6) and the lower die (5).
3. The superplastic forming die as set forth in claim 1, wherein:
and a locating pin (501) is fixedly arranged on one side of the lower die (5) corresponding to the upper die (6), and a locating hole matched with the locating pin (501) is formed in the lower die (5).
4. The superplastic forming die as set forth in claim 1, wherein:
connecting pins (502) are fixedly arranged on the left side wall and the right side wall of the lower die (5), and connecting holes matched with the positioning connecting pins (502) are formed in the part lower plate (3).
5. The superplastic forming die as set forth in claim 1, wherein:
and mounting holes (11) for mounting thermocouples are formed in the upper die (6) and the lower die (5).
6. The method for using the superplastic forming die is characterized by comprising the following steps of:
step 1: assembling the welded components of the process plate (1), the part upper plate (2) and the part lower plate (3) with an upper die (6) and a lower die (5) in sequence;
step 2: vacuumizing the air inlet pipe (4), heating the die, and continuously blowing argon into the positions of the upper air holes (602) and the lower air holes (503) of the upper die (6) and the lower die (5);
step 3: heating to 860-940 ℃ for diffusion welding, and driving the upper die (6) to apply pressure to the lower die (5), wherein argon is blown into the upper air holes (602) of the upper die (6);
step 4: after diffusion welding is finished, performing superplastic forming, wherein the superplastic forming temperature is 880-940 ℃, firstly, deflating an upper die (6) and a lower die (5) through an upper air hole (602) and a lower air hole (503), vacuumizing, and filling argon into an air inlet pipe (4);
step 5: the temperature of the die is reduced to 500 ℃, the upper die (6) is not applied with pressure, the temperature is reduced, and the workpiece is taken out;
step 6: cleaning the back of a finished product by adopting a stainless steel brush, cutting off redundant parts of a part plate by adopting laser cutting, removing the process plate (1), and removing a marking area (201) of the part upper plate (2);
step 7: and the position where the combined part upper plate (2) and the part lower plate (3) are connected with the air inlet pipe (4) is plugged by adopting argon arc welding.
7. The method of claim 6, wherein,
the pressure of the argon blown into the upper air holes (602) of the upper die (6) in the step 3 is smaller than the pressure applied by the upper die (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311289453.6A CN117283304A (en) | 2023-10-08 | 2023-10-08 | Superplastic forming die and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311289453.6A CN117283304A (en) | 2023-10-08 | 2023-10-08 | Superplastic forming die and using method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN117283304A true CN117283304A (en) | 2023-12-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311289453.6A Pending CN117283304A (en) | 2023-10-08 | 2023-10-08 | Superplastic forming die and using method thereof |
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| US6418619B1 (en) * | 1999-10-14 | 2002-07-16 | Rolls-Royce Plc | Method of manufacturing an article by superplastic forming and diffusion bonding |
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| CN115971628A (en) * | 2022-12-13 | 2023-04-18 | 北京航星机器制造有限公司 | Control method for superplastic forming diffusion connection triangular area fillet with titanium alloy four-layer structure |
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