CN114247810B - Forming die and forming method for forming annular anisotropic crimping part by rubber bag - Google Patents
Forming die and forming method for forming annular anisotropic crimping part by rubber bag Download PDFInfo
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- CN114247810B CN114247810B CN202111548453.4A CN202111548453A CN114247810B CN 114247810 B CN114247810 B CN 114247810B CN 202111548453 A CN202111548453 A CN 202111548453A CN 114247810 B CN114247810 B CN 114247810B
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- 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
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/001—Shaping combined with punching, e.g. stamping and perforating
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- 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
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
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- 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
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- 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
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/003—Positioning devices
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- 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
- B21D53/00—Making other particular articles
- B21D53/16—Making other particular articles rings, e.g. barrel hoops
Abstract
The invention discloses a forming die and a forming method for forming an annular anisotropic crimping part by using a rubber bag, wherein the forming die comprises a carcass, a first forming die and a second forming die, the carcass is provided with a central hole and a step surface, the first forming die comprises an inner backing plate, a gap gasket and an outer cover plate, the inner backing plate is arranged in the central hole on the inner side of the carcass, the outer cover plate is arranged on the upper part on the outer side of the carcass, a gap is formed between the outer cover plate and the carcass, and the gap gasket is arranged between the gaps; the second forming die comprises an inner cover plate and an inner shape core, wherein the inner cover plate is arranged on the part blank formed by the first forming die and is used for clamping the part on a carcass; the inner-shaped core is used for replacing the inner backing plate and is placed at the position of the inner backing plate. By adopting the forming die and the forming method, the purpose of integrally forming the annular anisotropic bent edge part is achieved through the rubber bag by pressing and forming in two working procedures, and the forming die and the forming method have the advantages of convenience in operation, convenience in use and the like, and are worthy of popularization and use in the sheet metal manufacturing industry.
Description
Technical Field
The invention relates to the technical field of sheet metal part rubber bag forming, in particular to a forming die and a forming method for forming an annular anisotropic crimping part by using a rubber bag.
Background
In the aircraft industry, aircraft sheet metal parts are dominant in a wide variety of aircraft structures, and it is counted that aircraft sheet metal parts account for approximately more than 50% of aircraft structural parts. In the process of forming an aircraft sheet metal part, rubber bag forming is already an important forming method of the aircraft sheet metal part. When the annular anisotropic flanging part is formed in the past, stamping, drawing and forming are adopted, or rubber bag hydraulic forming is adopted, but the two processes are both adopted, and at least 2 sets of dies are needed to form the part. The method has the advantages of high processing speed, good part forming quality, small batch of aircraft sheet metal parts, complex structure and high part changing frequency, and the cost of the deep drawing die is relatively high, so the method has poor economy. The rubber bag forming is adopted, and belongs to the traditional forming mode, and because the tool is simple in structure and low in manufacturing requirement, the rubber bag forming machine is more commonly used in the sheet metal part forming process.
In the manufacturing process of the sheet metal parts of the aircraft, most parts of the annular fan part of the aircraft engine are annular anisotropic flanging parts, as shown in fig. 1 and 2, the annular structural part is the annular anisotropic flanging parts, the top of the annular structural part is provided with an anisotropic flanging structure, the existing rubber bag is adopted for direct forming, the wrinkling phenomenon is easily caused in the outer flanging of the parts, the forming quality of the parts is seriously affected, and the wrinkling can be eliminated only in a manual shape correcting mode in the later stage. The manual correction is adopted, so that the workload is large, the forming quality is not easy to control, the surface quality of a formed product is unstable, and the defects of low part tire sticking degree, poor surface quality, poor roundness of an annular part and the like are likely to exist in the part after the manual correction and trimming. Therefore, aiming at the forming quality and the surface quality of the parts, whether the parts can be formed by only adopting a mode of a mould structural form and an optimized process method or not can be realized by a set of tool, so that the working efficiency can be improved, the production cost can be reduced, and the high-quality requirement of an airplane can be met.
Disclosure of Invention
The invention aims at solving the technical problems in the background art, and provides a forming die which is simple in structure and convenient to operate, and the forming die is used for integrally forming the annular anisotropic crimping part twice, so that the problem of wrinkling of the part in the forming process is effectively avoided, the forming quality and the production efficiency of a product are improved, and particularly the forming die and the forming method for forming the annular anisotropic crimping part by using a rubber bag are provided.
In order to solve the technical problems, the invention adopts the following technical scheme: the forming die comprises a carcass, a first forming die and a second forming die, wherein the first forming die and the second forming die are matched with the carcass, the carcass is provided with a central hole and a step surface, the first forming die comprises an inner backing plate, a gap gasket and an outer cover plate, the inner backing plate is arranged in the central hole on the inner side of the carcass, the outer cover plate is arranged on the upper part on the outer side of the carcass, a gap is formed between the outer cover plate and the carcass, and the gap gasket is arranged between the gaps; the second forming die comprises an inner cover plate and an inner forming core, the outer shape structure of the inner forming core is the same as that of the inner backing plate, and the inner cover plate is arranged on the part blank formed by the first forming die and is positioned on the step surface of the carcass, so that the part blank to be formed is clamped on the carcass; the inner core is used for replacing the inner backing plate, is placed at the position of the inner backing plate after the inner backing plate is removed, and moves downwards under the pressure of the rubber bag to force the inner side of the part woolen to be bent and formed.
The invention also discloses a forming method for the annular anisotropic crimping part by adopting the forming die, wherein the forming method is that the first forming die and the second forming die are respectively matched with a tire body, and the inside crimping forming of the part is realized by two integral forming; during the first forming, the inner backing plate is firstly placed in a central hole on the inner side of the carcass, then the outer cover plate is placed on the upper part on the outer side of the carcass, the gap gasket is arranged in a gap between the outer cover plate and the carcass, and finally the part woolen can be formed under the pressure of the rubber bag; after the first forming is finished, carrying out second forming, and during the second forming, firstly removing the outer cover plate, the inner backing plate and the gap gasket from the tire body, and then placing the inner cover plate in the part blank and at the step surface position in the tire body for clamping the part blank on the tire body; then placing the inner shape core in the hollow central hole after the inner backing plate is removed from the carcass, and under the support of the part woolen, positioning the inner shape core above the upper surface of the central hole; under the pressure of rubber bag, the inner cover plate is used to correct the part, and the inner core moves downwards under the pressure of rubber bag to force the inner crimp of the part to form downwards.
Further, the forming method of the invention is adopted, wherein in the two integral forming processes, the specific forming process comprises the following steps:
(1) Firstly, placing a forming die in a rubber bag forming machine platform, placing an outer cover plate at the upper part of the outer side of a tire body, and placing a gap gasket in a gap between the outer cover plate and the tire body, wherein the gap gasket has the function of keeping the gap between the outer cover plate and the tire body under the pressure of the rubber bag, so that the part is prevented from being clamped too tightly, and the flow property of the part is prevented from being influenced; simultaneously, the part woolen is clamped in a gap between the outer cover plate and the tire body, and finally, the inner backing plate is filled in a central hole in the tire body, so that the excessive pressure during rubber bag forming is avoided, and the inner side flanging of the part is prevented from being formed in advance;
(2) Starting a rubber bag forming machine, increasing the pressure to 18-23 MPa, and maintaining the pressure for 0.5-1.5 minutes, wherein at the moment, under the pressure of the rubber bag, parts are gradually attached to a tire body, but in the process of gradually attaching the parts to the tire body, parts are still not completely attached to the tire body;
(3) After the pressure maintaining is finished, gradually reducing the pressure of the rubber bag forming machine, and finishing the first forming process when the pressure is reduced to zero;
(4) After the first forming process is finished, the outer cover plate, the gap gasket and the inner backing plate are removed from the tire body; then, the inner cover plate is placed on the part after the first forming process is finished and is positioned at the step surface position in the carcass, so that the part woolen is clamped between the inner cover plate and the carcass, the effect of correcting the part after the first forming process is finished is achieved, and the part can be cut into inner holes, namely, the part woolen is used for the second forming and spreading; finally, placing the inner shape core at the position of the withdrawn inner backing plate, requiring the inner shape core to be on the upper surface of the formed part blank, and enabling the inner shape core not to completely enter the central hole of the carcass under the support of the part blank;
(5) Starting a rubber bag forming machine, increasing the pressure to 23-28 MPa, maintaining the pressure for 0.5-1.5 minutes, extruding an inner cover plate under the pressure of the rubber bag, correcting the step position of a part, and forming and attaching the part on a step surface in a tire body; and the inner core moves downwards under pressure and enters the central hole of the tire body to bring the part blank into the central hole of the tire body, so that an inner side bent edge is formed in the part blank, and the second forming process is completed.
Further, by adopting the forming method, the rubber bag forming machine is a 7.7-ten-thousand-ton rubber bag forming machine, wherein the pressure is increased to 20MPa in the first forming process, the pressure is maintained for 1 minute, and the pressure is increased to 25MPa in the second forming process, and the pressure is maintained for 1 minute.
Compared with the prior art, the forming die and the forming method for forming the annular anisotropic crimping part by using the rubber bag have the beneficial effects that: through the cooperation of outer apron, inner decking, inner backing plate and interior shape core with the child body according to corresponding order, through rubber bag substep pressurization shaping, reach the purpose of shaping annular abnormal flange part, can effectively eliminate the phenomenon that the outside flange of part appears wrinkling easily to improve the shaping quality and the surface quality problem of this type of part, can greatly improve production efficiency, reduction in production cost.
In summary, by adopting the forming die and the forming method, the purpose of integrally forming the annular anisotropic crimping part is achieved through the two working procedures of pressurizing and forming the rubber bag, so that the forming quality can be improved, the production cost can be reduced, the production efficiency can be improved, the universality is good, the disassembly and the installation are convenient, the operation is convenient, the use is convenient, and the like, and the forming die and the forming method are worthy of popularization and use in the sheet metal manufacturing industry.
Drawings
The invention is described in further detail below with reference to the accompanying drawings.
FIG. 1 is a schematic view of the structure of an annular anisotropic crimping part;
FIG. 2 is a schematic view of the structure in the direction A-A in FIG. 1;
FIG. 3 is a schematic diagram of the structure of the present invention;
FIG. 4 is a schematic view of the first forming mold of the present invention mated with a carcass;
fig. 5 is a schematic structural view of the second forming mold of the present invention when it is mated with a carcass.
The figure shows: 1-inner backing plate, 2-parts, 3-matrix, 4-inner cover plate, 5-gap gasket, 6-outer cover plate and 7-inner core.
Detailed Description
For further explanation of the inventive concept, the following description of specific embodiments of the present invention will be given with reference to the accompanying drawings:
because the parts of the ring fan part of the aircraft engine are mostly annular anisotropic bent edge parts in the manufacturing process of the sheet metal parts of the aircraft, the traditional processing method is stamping and deep drawing and two forming processes of rubber bag forming machine forming aiming at the parts. And the stamping and deep drawing forming mode is adopted, more than 2 sets of tools are needed, and the deep drawing die for deep drawing forming has complex structure, high manufacturing requirement and high manufacturing cost, and is not beneficial to the production mode of small-batch characteristics of the airplane sheet metal. The rubber bag forming process mode is adopted, more than 2 sets of tools are needed, and in the forming process, the outer side of the part is bent due to the wrinkling problem, so that the part cannot be directly formed through the rubber bag in the forming process, but is formed manually, and the rubber bag is subjected to shape correction or is subjected to shape correction and trimming in a manual mode after being formed. Therefore, the surface quality of the formed part is poor and the processing period is long by using the forming process. Therefore, in order to utilize the characteristics that the rubber bag forming process is mature, a set of forming die is designed, and the die can be used for integrally forming parts, so that the working efficiency can be improved, the production cost can be reduced, and the high-quality requirement of an airplane can be met.
As shown in fig. 3 to 5, the forming die for forming the annular anisotropic crimping part by using the rubber bag comprises a carcass 3, a first forming die and a second forming die matched with the carcass 3, wherein the carcass 3 is provided with a central hole and a step surface, the first forming die comprises an inner backing plate 1, a gap gasket 5 and an outer cover plate 6, the inner backing plate 1 is placed in the central hole on the inner side of the carcass 3, the outer cover plate 6 is placed on the upper part on the outer side of the carcass 3, a gap is formed between the outer cover plate 6 and the carcass 3, and the gap gasket 5 is arranged between the gaps; the second forming die comprises an inner cover plate 4 and an inner shape core 7, the outer shape structure of the inner shape core 7 is the same as that of the inner backing plate 1, the inner cover plate 4 is arranged on the rough material of the part 2 formed by the first forming die and is positioned on the step surface of the carcass 3, and the inner cover plate 4 is used for clamping the rough material of the part 2 to be formed on the carcass 3; the inner shape core 7 is used for replacing the inner cushion plate 1, is arranged at the position of the inner cushion plate 1 after the inner cushion plate 1 is removed, and moves downwards under the pressure of the rubber bag to force the inner side of the woolen of the part 2 to be bent and formed.
The forming method for the annular anisotropic crimping part by adopting the forming die is characterized in that the forming method is that a first forming die and a second forming die are respectively matched with a matrix 3, and the inside crimping forming of the part 2 is realized by two integral forming; during the first forming, firstly placing the inner backing plate 1 in a central hole on the inner side of the carcass 3, then placing the outer cover plate 6 on the upper part of the outer side of the carcass 3, arranging the gap gasket 5 in a gap between the outer cover plate 6 and the carcass 3, and finally forming the rough material of the part 2 under the pressure of a rubber bag; after the first forming is completed, carrying out the second forming, during the second forming, firstly removing the outer cover plate 6, the inner backing plate 1 and the gap gasket 5 from the tire body 3, and then placing the inner cover plate 4 in the rough material of the part 2 and at the step surface position in the tire body 3 for clamping the rough material of the part 2 on the tire body 3; then, the inner shape core 7 is placed in the central hole vacated after the inner backing plate 1 is withdrawn from the carcass 3 and is positioned above the upper surface of the central hole under the support of the rough material of the part 2; under the pressure of the rubber bag, the inner cover plate 4 is used for correcting the part, the inner core 7 moves downwards under the pressure of the rubber bag, the inner flanging of the part 2 is forced to be downwards formed, and the inner flanging of the part 2 is formed by gradually entering the central hole in the carcass 3 through the inner core 7; the specific forming process comprises the following steps:
(1) Firstly, placing a forming die in a rubber bag forming machine platform, placing an outer cover plate 6 at the upper part of the outer side of a tire body 3, and placing a gap gasket 5 in a gap between the outer cover plate 6 and the tire body 3, wherein the gap gasket 5 has the function of keeping the gap between the outer cover plate 6 and the tire body 3 under the pressure of a rubber bag, so that the part 2 is prevented from being clamped too tightly, and the flow property of the part 2 is prevented from being influenced; simultaneously, the rough material of the part 2 is clamped in a gap between the outer cover plate 6 and the carcass 3, and finally the inner backing plate 1 is filled in a central hole in the carcass 3, so that the excessive pressure during rubber bag forming is avoided, and the inner side flanging of the part 2 is prevented from being formed in advance;
(2) Starting a 7.7-ten-thousand-ton rubber bag forming machine, increasing the pressure to 20MPa, and maintaining the pressure for 1 minute, wherein at the moment, the part 2 is gradually attached to the tire body 3 under the pressure of the rubber bag, but the part 2 is still partially and incompletely attached to the tire body 3 in the process of gradually attaching to the tire body 3;
(3) After the pressure maintaining is finished, gradually reducing the pressure of the rubber bag forming machine, and finishing the first forming process when the pressure is reduced to zero;
(4) After the first forming process is finished, the outer cover plate 6, the gap gaskets 5 and the inner backing plate 1 are removed from the carcass 3; then, the inner cover plate 4 is placed on the part after the first working procedure is finished and is positioned at the step surface position in the tyre body 3, and the blank of the part 2 is clamped between the inner cover plate 4 and the tyre body 3, so that the effect of correcting the part 2 after the first forming working procedure is achieved, and the part 2 can be cut into an inner hole, namely, the blank is used for the second forming and spreading; finally, placing the inner core 7 at the position of the withdrawn inner backing plate 1, and requiring the inner core 7 to be on the upper surface of the blank of the formed part 2, wherein the inner core 7 does not completely enter the central hole of the carcass 3 under the support of the blank of the part 2;
(5) Starting a 7.7-ten-thousand-ton rubber bag forming machine, increasing the pressure to 25MPa, maintaining the pressure for 1 minute, extruding the inner cover plate 4 under the pressure of the rubber bag, correcting the step position of the part 2, and forming and attaching the part on the step surface in the carcass 3; the inner core 7 moves downwards under pressure and enters the central hole of the carcass 3, and the blank of the part 2 is brought into the central hole of the carcass 3, so that an inner bent edge is formed in the blank of the part 2, and the second forming process is completed.
According to the forming die and the forming method for the annular anisotropic crimping part formed by the rubber bag, the outer cover plate 6, the inner cover plate 4, the inner base plate 1 and the inner core 7 are matched with the tire body 3 according to the corresponding sequence, and the rubber bag is subjected to pressure forming in two working procedures, so that the purpose of integrally forming the annular anisotropic crimping part is achieved, the phenomenon that the outer crimping of the part is easy to wrinkle can be effectively eliminated, the forming quality and the surface quality of the part are improved, the production efficiency is greatly improved, and the production cost is reduced.
In summary, by adopting the forming die and the forming method, the forming quality can be improved, the production cost can be reduced, the production efficiency can be improved, the universality is good, the disassembly and the installation are convenient, the operation is convenient, the use is convenient, and the like, and the forming die and the forming method are worthy of being popularized and used in the sheet metal manufacturing industry.
The above description is only of the preferred embodiments of the present invention, and it should be understood that various changes and modifications can be made by those skilled in the art, and any modifications, equivalents, improvements and the like made by the present invention should be included in the scope of the present invention.
Claims (4)
1. A forming die for forming annular anisotropic crimping parts by rubber bags is characterized in that: the forming die comprises a carcass (3) and a first forming die and a second forming die which are matched with the carcass (3), wherein the carcass (3) is provided with a central hole and a step surface, the first forming die comprises an inner backing plate (1), a gap gasket (5) and an outer cover plate (6), the inner backing plate (1) is placed in the central hole at the inner side of the carcass (3), the outer cover plate (6) is placed at the upper part at the outer side of the carcass (3), a gap is formed between the outer cover plate (6) and the carcass (3), and the gap gasket (5) is arranged between the gaps; the second forming die comprises an inner cover plate (4) and an inner forming core (7), the inner forming core (7) has the same appearance structure as the inner backing plate (1), the inner cover plate (4) is placed on the rough material of the part (2) formed by the first forming die and is positioned on the step surface of the carcass (3) for clamping the rough material of the part (2) to be formed on the carcass (3); the inner-shaped core (7) is used for replacing the inner base plate (1), is arranged at the position of the inner base plate (1) after the inner base plate (1) is removed, and moves downwards under the pressure of the rubber bag to force the inner side of the woolen of the part (2) to be bent and formed.
2. The forming method of the annular anisotropic crimping part by using the forming die according to claim 1, wherein: the forming method is characterized in that a first forming die and a second forming die are respectively matched with a tire body (3), and the inner side flanging forming of the part (2) is realized through two integral forming; during the first forming, firstly placing the inner backing plate (1) in a central hole on the inner side of the tire body (3), then placing the outer cover plate (6) on the upper part of the outer side of the tire body (3), arranging the gap gasket (5) in a gap between the outer cover plate (6) and the tire body (3), and finally forming the rough material of the part (2) under the pressure of a rubber bag; after the first forming is finished, performing a second forming, during the second forming, firstly removing the outer cover plate (6), the inner backing plate (1) and the gap gasket (5) from the tire body (3), and then placing the inner cover plate (4) in the rough material of the part (2) and at the step surface position in the tire body (3) for clamping the rough material of the part (2) on the tire body (3); then placing the inner shape core (7) in a central hole vacated after the inner backing plate (1) is removed from the carcass (3), and under the support of the woolen of the part (2), positioning the inner shape core above the upper surface of the central hole; under the pressure of the rubber bag, the inner cover plate (4) is used for correcting the part, the inner core (7) moves downwards under the pressure of the rubber bag to force the inner flanging of the part (2) to form downwards, and the inner flanging of the part (2) is formed through gradually entering the central hole in the carcass (3) through the inner core (7).
3. The forming method according to claim 2, wherein in the two integral forming processes, a specific forming process includes the steps of:
(1) Firstly, placing a forming die in a rubber bag forming machine platform, placing an outer cover plate (6) at the upper part of the outer side of a tire body (3), and placing a gap gasket (5) in a gap between the outer cover plate (6) and the tire body (3), wherein the gap gasket (5) has the function of keeping the gap between the outer cover plate (6) and the tire body (3) under the pressure of the rubber bag so as to prevent the part (2) from being clamped too tightly and affecting the flow property of the part (2); simultaneously, the woolen of the part (2) is clamped in a gap between the outer cover plate (6) and the tire body (3), and finally the inner base plate (1) is filled in a central hole in the tire body (3), so that the excessive pressure during rubber bag forming is avoided, and the inner side flanging of the part (2) is avoided to be formed in advance;
(2) Starting a rubber bag forming machine, increasing the pressure to 18-23 MPa, and maintaining the pressure for 0.5-1.5 minutes, wherein at the moment, under the pressure of the rubber bag, the part (2) is gradually attached to the tire body (3), but the part (2) is still partially and incompletely attached to the tire body (3) in the process of gradually attaching to the tire body (3);
(3) After the pressure maintaining is finished, gradually reducing the pressure of the rubber bag forming machine, and finishing the first forming process when the pressure is reduced to zero;
(4) After the first forming process is finished, the outer cover plate (6), the gap gasket (5) and the inner backing plate (1) are removed from the tire body (3); then, the inner cover plate (4) is placed on the part after the first forming process is finished and is positioned at the step surface position in the tire body (3) to clamp the woolen of the part (2) between the inner cover plate (4) and the tire body (3), so that the function of correcting the part (2) after the first forming process is finished is achieved, and the part (2) can be cut into an inner hole, namely, the woolen is used for the second forming and spreading; finally, placing the inner shape core (7) at the position of the withdrawn inner backing plate (1), wherein the inner shape core (7) is required to be arranged on the upper surface of the blank of the formed part (2), and the inner shape core (7) is not completely inserted into the central hole of the carcass (3) under the support of the blank of the part (2);
(5) Starting a rubber bag forming machine, increasing the pressure to 23-28 MPa, maintaining the pressure for 0.5-1.5 minutes, extruding an inner cover plate (4) under the pressure of the rubber bag, correcting the step position of a part (2), and forming and attaching the part on the step surface in a tire body (3); and the inner core (7) moves downwards under pressure and enters the central hole of the tire body (3), and the blank of the part (2) is brought into the central hole of the tire body (3), so that the inner bent edge is formed in the blank of the part (2), and the second forming process is completed.
4. The forming method according to claim 2, characterized in that: the rubber bag forming machine is a 7.7-ten-thousand-ton rubber bag forming machine, wherein the pressure is increased to 20MPa in the first forming process, the pressure is maintained for 1 minute, and the pressure is increased to 25MPa in the second forming process, and the pressure is maintained for 1 minute.
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| CN202111548453.4A CN114247810B (en) | 2021-12-17 | 2021-12-17 | Forming die and forming method for forming annular anisotropic crimping part by rubber bag |
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| CN202111548453.4A CN114247810B (en) | 2021-12-17 | 2021-12-17 | Forming die and forming method for forming annular anisotropic crimping part by rubber bag |
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| CN114247810B true CN114247810B (en) | 2023-09-29 |
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| CN112719021A (en) * | 2020-12-11 | 2021-04-30 | 中航贵州飞机有限责任公司 | Flexible side pressing block composite tool for forming sheet metal part rubber bag and using method |
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| CN111229914A (en) * | 2019-12-13 | 2020-06-05 | 西安飞机工业（集团）有限责任公司 | Rubber forming method and forming die for sheet metal frame part with different-direction bent edges |
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| CN114247810A (en) | 2022-03-29 |
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