CN109675999B - Viscous medium pressure forming device for curvature abrupt-change thin-wall covering part - Google Patents
Viscous medium pressure forming device for curvature abrupt-change thin-wall covering part Download PDFInfo
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- CN109675999B CN109675999B CN201910064308.5A CN201910064308A CN109675999B CN 109675999 B CN109675999 B CN 109675999B CN 201910064308 A CN201910064308 A CN 201910064308A CN 109675999 B CN109675999 B CN 109675999B
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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
- 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
- B21D26/021—Deforming sheet bodies
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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
- 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
- B21D26/021—Deforming sheet bodies
- B21D26/027—Means for controlling fluid parameters, e.g. pressure or temperature
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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
- 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
- B21D26/021—Deforming sheet bodies
- B21D26/029—Closing or sealing means
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention belongs to the field of manufacturing of thin-walled parts for aerospace equipment, and particularly relates to a viscous medium pressure forming device for a curvature mutation thin-walled covering part. The device provides viscous medium injection pressure through a hydraulic control system to control the viscous medium loading pressure; viscous medium is loaded to the forming plate blank through the viscous medium bin and generates forming force on the forming plate blank, the feeding cavities are arranged in the viscous medium bin, different numbers of feeding cavities are arranged according to the shape and the wall thickness of the part, the effect that each area of the plate is fully subjected to viscous medium pressure and viscous medium adhesive stress is promoted, deformation flowing towards a die cavity of a forming die is facilitated, and the forming property of the plate is improved. The device has simple structure, easy operation and better control stability, and can effectively carry out viscous medium pressure processing and forming on the curvature mutation thin-wall covering piece.
Description
Technical Field
The invention relates to the field of forming and manufacturing thin-wall parts of aerospace equipment, in particular to a viscous medium pressure forming device for a curvature mutation thin-wall covering part.
Background
The high-strength heat-resistant alloy local curvature abrupt change thin-wall covering piece is commonly used for a heat protection system in the fields of aviation, aerospace and industrial heat energy engineering, and is characterized in that the local area curvature abrupt change and the wall thickness are ultrathin, the material supplement at the curvature abrupt change position is difficult during forming, and the defect of transitional thinning and even cracking is easy to occur. When the local curvature abrupt change thin-wall covering part is formed by using the viscous medium, the reasonable control of the forming force of the viscous medium in a local area is difficult to grasp, the forming device is required to be capable of effectively controlling the forming force of the viscous medium in each area in a die cavity in the forming process, and the injection pressure of the viscous medium and the sealing pressure of the viscous medium part are matched in a coordinated manner. However, there is no forming apparatus that can meet the above requirements.
Disclosure of Invention
The invention aims to solve the technical problem that the structural structure of the conventional viscous medium pressure forming device makes pressure difficult to control, so that the qualification rate of a curvature abrupt change thin-wall cover part is influenced, and the invention provides the viscous medium pressure forming device for the curvature abrupt change thin-wall cover part aiming at the defects in the prior art.
The invention is realized by adopting the following technical scheme:
a viscous medium pressure forming device for a curvature abrupt change thin-wall covering part comprises a section die, a sealing ring, a viscous medium bin, a viscous medium injection cylinder, a viscous medium loading power source hydraulic cylinder and a viscous medium bin end sealing loading power source hydraulic cylinder. The forming die is arranged above the viscous medium bin, the sealing ring is arranged on the upper surface of the viscous medium bin, the viscous medium injection cylinder is arranged below the viscous medium bin, the viscous medium loading power source hydraulic cylinder is arranged at the bottom of the viscous medium injection cylinder, and under the control of the control system, the viscous medium loading power source hydraulic cylinder provides and controls the loading force F and the loading speed of the viscous medium; the viscous medium bin end sealing loading power source hydraulic cylinder is arranged at the upper end of the section die, and under the control of the control system, the viscous medium bin end sealing loading power source hydraulic cylinder provides loading force F' for the viscous medium bin end sealing.
Preferably, a funnel-shaped feeding cavity is arranged in the viscous medium bin, a conical opening at the top of the feeding cavity is opposite to the sheet blank, the bottom of the feeding cavity is communicated with the viscous medium injection cylinder, and a hydraulic cylinder of a viscous medium loading power source pushes a plunger arranged in the viscous medium injection cylinder to move so as to push the viscous medium to be injected into the viscous medium bin from the viscous medium injection cylinder.
Preferably, the number of the feeding cavities is 2-10, and the number of the feeding cavities is determined by the shape and the wall thickness of the plate blank.
Preferably, the taper delta of the conical opening at the top of the feeding cavity ranges from 1.2:1 to 5: 1.
Preferably, the diameter of the bottom of the feeding cavity is phi, the height of the feeding cavity is h, the value range of the diameter phi is 10 mm-80 mm, and the value range of the height h is 100-160 mm.
Preferably, the viscous medium injection cylinder is processed by die steel, and comprises an inner cylinder and an outer sleeve, wherein the wall thickness W of the inner cylinder is 20-40 mm, the wall thickness of the outer sleeve is axW, the coefficient a is 1.2-3.0, the height of the viscous medium injection cylinder is H, and the value range of the height H is 200-500 mm.
Preferably, the loading pressure of the viscous medium is not more than 400MPa, and the pressure loading speed is 0.1 MPa/s-1.6 MPa/s.
Preferably, the injection pressure of the viscous medium is controlled by a loading force F of a hydraulic cylinder of a viscous medium loading power source, the sealing pressure of the end part of the viscous medium bin is controlled by a loading force F 'of a hydraulic cylinder of a viscous medium loading power source, the two are matched with each other in a coordinated manner, and the force F' is positively correlated with the force F.
Preferably, the sealing ring is made of soft metal or rubber.
Preferably, the soft metal is aluminum or an aluminum alloy.
Preferably, the device is arranged on a frame.
The implementation of the technical scheme of the invention has the following beneficial effects: the invention provides a forming device for a curvature abrupt change thin-wall covering part, which provides viscous medium injection pressure through a hydraulic control system and controls the viscous medium loading pressure; viscous medium is loaded to the forming plate blank through the viscous medium bin and generates forming force to the forming plate blank, the viscous medium bin is internally in a funnel shape, the opening at the top corresponds to the plate blank, the pressure loading of the viscous medium to the plate blank is facilitated, the lower end of the feeding cavity in the funnel shape loads the viscous medium through the plunger, meanwhile, different numbers of feeding cavities can be arranged according to the shape and the wall thickness of a forming part, the forming pressure of the viscous medium to the plate blank in the viscous medium bin can be effectively controlled, the effect that each area of the plate is fully affected by the pressure of the viscous medium and the viscous adhesive stress of the viscous medium is promoted, the deformation flowing of the cavity of the forming die is facilitated, and the forming property. The device has the advantages of simple structure, easy operation and good control stability, and can effectively perform the pressure forming of the viscous medium of the curvature mutation thin-wall covering piece.
Drawings
FIG. 1 is a schematic diagram of a viscous medium pressure forming device for a curvature abrupt thin-wall covering part in the invention;
2(a) -2 (c) are schematic diagrams of the viscous medium pressure forming die structure and forming process of the covering part in the invention;
FIG. 3 is a schematic view of a viscous medium chamber of the covering member viscous medium pressure forming device of the present invention;
FIG. 4 is a schematic view of a viscous medium injection cylinder of the cover member viscous medium pressure forming apparatus of the present invention;
FIG. 5 is a schematic diagram of a viscous medium bin with 3 funnel-shaped feeding cavities according to the present invention;
FIG. 6 is a schematic diagram of a mold structure for forming a viscous medium bin with 3 funnel-shaped feeding cavities according to the present invention;
fig. 7 is a schematic diagram of a viscous medium bin with 5 funnel-shaped feeding cavities in the invention.
In the figure: 1: forming a mould; 2: a seal ring; 3: a sheet blank; 4: a viscous medium; 5: a viscous medium reservoir; 5-1: a feed cavity; 6: a viscous medium injection cylinder; 6-1: an inner cylinder; 6-2: a jacket; 7: a plunger; 8: a viscous medium loading power source hydraulic cylinder; 9: the end part of the viscous medium bin is sealed and loaded with a power source hydraulic cylinder; 100: and a frame.
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 obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Referring to fig. 1-7, a curvature abrupt change thin-wall covering part viscous medium pressure forming device comprises a forming die 1, a sealing ring 2, a viscous medium bin 5, a viscous medium injection cylinder 6, a viscous medium loading power source hydraulic cylinder 8 and a viscous medium bin end sealing loading power source hydraulic cylinder 9.
The device is disposed on a rack 100. The forming process control system controls the hydraulic circuit to load the viscous medium 4 to realize the processing of the thin-wall covering piece.
The connection and position relation of the parts of the device is as follows: the forming die 1 is arranged above the viscous medium bin 5, the sealing ring 2 is arranged on the upper surface of the viscous medium bin 5, the viscous medium injection cylinder 6 is arranged below the viscous medium bin 5, the viscous medium loading power source hydraulic cylinder 8 is arranged at the bottom of the viscous medium injection cylinder 6, and under the control of the control system, the viscous medium loading power source hydraulic cylinder 8 provides and controls the loading force F and the loading speed of the viscous medium 4; the end sealing loading power source hydraulic cylinder 9 of the viscous medium bin is arranged at the upper end of the section die 1, and under the control of the control system, the end sealing loading power source hydraulic cylinder 9 of the viscous medium bin provides loading force F' for the end sealing of the viscous medium bin 5.
The injection pressure of the viscous medium is controlled by the loading force F of the viscous medium loading power source hydraulic cylinder 8, the sealing pressure of the end part of the viscous medium bin is controlled by the loading force F ' of the viscous medium bin end part sealing loading power source hydraulic cylinder 9, the two are matched with each other in a coordinated manner, and the force F ' is increased along with the increase of the force F, namely the force F ' is positively correlated with the force F.
The loading pressure of the viscous medium is not more than 400MPa, and the pressure loading speed is 0.1 MPa/s-1.6 MPa/s.
For this device the way and parameters in which the viscous medium magazine 5 is loaded with viscous medium plays an important role. Referring to fig. 1-7, a funnel-shaped feeding cavity 5-1 is arranged inside the viscous medium bin 5, a conical opening at the top of the feeding cavity 5-1 is used for facing the sheet blank 3, the bottom of the feeding cavity 5-1 is communicated with a viscous medium injection cylinder 6, a hydraulic cylinder 8 of a viscous medium loading power source is used for pushing a plunger 7 arranged in the viscous medium injection cylinder 6 to move, and the viscous medium 4 is pushed to be injected into the viscous medium bin 5 from the viscous medium injection cylinder 6.
Alternatively, the shape of the feeding cavity 5-1 can be provided with other open shapes, such as a hemispherical concave cavity, a goblet shape, and the like.
In order to achieve accurate forming of the thin-wall covering part, the number of the feeding cavities 5-1 is determined by the shape and the wall thickness of the plate blank 3, a plurality of general feeding cavities 5-1 are arranged, and the number of the general feeding cavities is generally set to be 2-10 according to the size of the viscous medium bin 5. The feeding cavities 5-1 are generally uniformly distributed, or the arrangement mode of the feeding cavities 5-1 is optimally designed through finite element simulation according to different forming areas, so that the forming force of the viscous medium can be accurately controlled, and the precision of a formed part is improved. To achieve the optimal forming effect.
In one embodiment, referring to fig. 1-3, the number of the funnel-shaped feeding cavities 5-1 is set to two; in the embodiment according to fig. 5 and 6, the number of funnel-shaped feed chambers 5-1 is three.
The two embodiments described above correspond to the case where the dimension in the length direction of the part is small or the wall thickness is relatively thick.
Whereas in the embodiment according to fig. 7 the number of funnel-shaped feed chambers 5-1 is set to five. A greater number of feed cavities corresponds to a greater dimension in the length direction of the part or a relatively thinner wall thickness.
Referring to the exemplary funnel-shaped feeding cavity 5-1 of fig. 1-7, a tapered opening at the top of the feeding cavity 5-1 has a certain taper Δ, and the taper Δ has a value range of 1.2:1 to 5: 1. The loading pressure can be controlled more effectively in this range.
The diameter of the bottom of the funnel-shaped feeding cavity 5-1 is phi, the height of the funnel-shaped feeding cavity is h, the value range of the diameter phi is 10 mm-80 mm, and the value range of the height h is 100-160 mm. The loading pressure can be effectively controlled in the range.
The viscous medium injection cylinder 6 is formed by processing die steel, the viscous medium injection cylinder 6 comprises an inner cylinder 6-1 and an outer sleeve 6-2, the wall thickness W of the inner cylinder is 20 mm-40 mm, the wall thickness of the outer sleeve is axW, the coefficient a is 1.2-3.0, the height of the viscous medium injection cylinder 6 is H, and the value range of the height H is 200 mm-500 mm. The arrangement of the inner cylinder 6-1 and the outer sleeve 6-2 is beneficial to improving the strength of the viscous medium injection cylinder 6, and the specific size of the viscous medium injection cylinder 6 in the embodiment can be set according to specific experimental forming parts and experimental requirements.
The sealing ring 2 is made of soft metal material or rubber material, in one embodiment, the soft metal material is aluminum or aluminum alloy, and the sealing effect is better. Set up the seal ring groove at the upper surface in viscous medium storehouse 5, will sealing washer 2 sets up in the seal ring groove, will wait to process slab material 3 place again on viscous medium storehouse 5 and support and lean on sealing washer 2. The mould 1 is pressed against the sheet blank 3. Along with the increase of loading force, sealing washer 2 is compressed tightly to good sealed effect has been guaranteed.
The curvature abrupt change thin-wall covering part viscous medium pressure forming device can provide a stable thin-wall covering part for aerospace equipment, and ensures the overall quality and stability.
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 (6)
1. The utility model provides a curvature sudden change thin wall covering viscous medium pressure forming device, the device includes section mould (1), sealing washer (2), viscous medium storehouse (5), viscous medium injection cylinder (6), viscous medium loading power supply pneumatic cylinder (8) and the sealed loading power supply pneumatic cylinder of viscous medium storehouse tip (9), its characterized in that: the forming die (1) is arranged above the viscous medium bin (5), the sealing ring (2) is arranged on the upper surface of the viscous medium bin (5), the viscous medium injection cylinder (6) is arranged below the viscous medium bin (5), the viscous medium loading power source hydraulic cylinder (8) is arranged at the bottom of the viscous medium injection cylinder (6), and under the control of a control system, the viscous medium loading power source hydraulic cylinder (8) provides and controls the loading force F and the loading speed of the viscous medium (4); the viscous medium bin end sealing loading power source hydraulic cylinder (9) is arranged at the upper end of the section die (1), and under the control of the control system, the viscous medium bin end sealing loading power source hydraulic cylinder (9) provides loading force F' for the end sealing of the viscous medium bin (5);
the injection pressure of the viscous medium is controlled by a loading force F of a viscous medium loading power source hydraulic cylinder (8), the sealing pressure of the end part of the viscous medium bin is controlled by a loading force F 'of a viscous medium bin end part sealing loading power source hydraulic cylinder (9), the two are matched with each other in a coordinated manner, and the force F' is positively correlated with the force F;
the loading pressure of the viscous medium is not more than 400MPa, and the pressure loading speed is 0.1 MPa/s-1.6 MPa/s;
a funnel-shaped feeding cavity (5-1) is arranged inside the viscous medium bin (5), a conical opening at the top of the feeding cavity (5-1) is used for facing the sheet blank (3), the bottom of the feeding cavity (5-1) is communicated with a viscous medium injection cylinder (6), a hydraulic cylinder (8) of a viscous medium loading power source is used for pushing a plunger (7) arranged in the viscous medium injection cylinder (6) to move, and the viscous medium (4) is pushed to be injected into the viscous medium bin (5) from the viscous medium injection cylinder (6);
the taper delta of the conical opening at the top of the feeding cavity (5-1) ranges from 1.2:1 to 5: 1.
2. The abrupt curvature thin wall cover viscous medium pressure forming device of claim 1, characterized in that: the number of the feeding cavities (5-1) is 2-10, and the number of the feeding cavities (5-1) is determined by the shape and the wall thickness of the plate blank (3).
3. The abrupt curvature thin wall cover viscous medium pressure forming device of claim 1, characterized in that: the diameter of the bottom of the feeding cavity (5-1) is phi, the height of the feeding cavity is h, the value range of the diameter phi is 10 mm-80 mm, and the value range of the height h is 100-160 mm.
4. A viscous medium pressure forming device of a curvature abrupt thin-wall covering part according to any one of claims 1 to 3, characterized in that: the viscous medium injection cylinder (6) is formed by processing die steel, the viscous medium injection cylinder (6) comprises an inner cylinder (6-1) and an outer sleeve (6-2), the wall thickness W of the inner cylinder is 20-40 mm, the wall thickness a multiplied by W of the outer sleeve is provided, the coefficient a is 1.2-3.0, the height of the viscous medium injection cylinder (6) is H, and the value range of the height H is 200-500 mm.
5. The abrupt curvature thin wall cover viscous medium pressure forming device of claim 4, characterized in that: the sealing ring (2) is made of soft metal or rubber.
6. The abrupt curvature thin wall cover viscous medium pressure forming device of claim 5, characterized in that: the soft metal is aluminum or aluminum alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910064308.5A CN109675999B (en) | 2019-01-23 | 2019-01-23 | Viscous medium pressure forming device for curvature abrupt-change thin-wall covering part |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910064308.5A CN109675999B (en) | 2019-01-23 | 2019-01-23 | Viscous medium pressure forming device for curvature abrupt-change thin-wall covering part |
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| CN109675999A CN109675999A (en) | 2019-04-26 |
| CN109675999B true CN109675999B (en) | 2019-12-20 |
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| CN110314971B (en) * | 2019-08-05 | 2020-05-12 | 哈尔滨工业大学 | Pressure forming resilience self-adaptive control method for plate viscous medium |
| CN112404532A (en) * | 2019-12-06 | 2021-02-26 | 重庆大学 | Auxiliary machining method for aviation thin-wall micro-structural part |
| CN112139340B (en) * | 2020-09-14 | 2022-06-21 | 哈尔滨工业大学 | Aluminum alloy component ultralow-temperature forming device and forming method |
| CN114178387B (en) * | 2021-12-14 | 2023-07-04 | 沈阳航空航天大学 | Ultrasonic vibration auxiliary combustion chamber cap cover viscous medium forming device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE2023599B2 (en) * | 1970-05-14 | 1972-04-13 | Siemens Electrogeräte GmbH, 1000 Berlin u. 8000 München | DEVICE FOR HYDROMECHANICAL PULLING |
| DE19734277C2 (en) * | 1997-08-07 | 2000-04-20 | Forschungsges Umformtechnik | Device for deep drawing a sheet using a pressure medium |
| JP4244629B2 (en) * | 2002-12-18 | 2009-03-25 | 日産自動車株式会社 | Hydraulic molding method and hydraulic molding apparatus |
| CN1962108A (en) * | 2006-11-24 | 2007-05-16 | 哈尔滨工业大学 | Forming method of high-strength high temperature-resistant thin-wall special-shaped curved corrugated fittings |
| CN105729877A (en) * | 2016-04-15 | 2016-07-06 | 天津百利机械装备集团有限公司中央研究院 | Internal high-pressure forming machine with variable mold clamping force and internal high-pressure forming processing method |
| CN107262583A (en) * | 2017-07-12 | 2017-10-20 | 上海理工大学 | Ultra-large type thin plate curved surface part numerical control hydromechanical deep drawing manufacturing process |
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