CN109676000A - A kind of deep camber thin-wall member resisting medium external pressure shaping device - Google Patents
A kind of deep camber thin-wall member resisting medium external pressure shaping device Download PDFInfo
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- CN109676000A CN109676000A CN201910064317.4A CN201910064317A CN109676000A CN 109676000 A CN109676000 A CN 109676000A CN 201910064317 A CN201910064317 A CN 201910064317A CN 109676000 A CN109676000 A CN 109676000A
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- Prior art keywords
- resisting medium
- injection
- cylinder
- load
- mould
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Classifications
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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
-
- 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
-
- 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
- B21D26/031—Mould construction
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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)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The present invention relates to aerospace equipment thin-wall member manufacturing fields, more particularly to a kind of deep camber thin-wall member resisting medium external pressure shaping device, device includes resisting medium injection load mould, pattern, mandrel, resisting medium injection cylinder, load mould sealing ring, cylinder blank, resisting medium load power source hydraulic cylinder and resisting medium injection load mould end part seal load power source hydraulic cylinder.The device provides resisting medium injection pressure by power control system, controls resisting medium on-load pressure；Resisting medium is applied to forming blank by injection channel and generates forming force to it, it can be according to the injection channel of formation of parts shape and wall thickness setting different number and shape, resisting medium external pressure shaping pressure-loaded can effectively be controlled, realize control plate blank material stress state, make the reasonable Deformation Flow of plate blank material, improves sheet material forming.The apparatus structure is simple, easy to operate, and control stability is preferable, can effectively carry out resisting medium external pressure shaping.
Description
Technical field
The present invention relates to the thin-wall part figuration manufacture field of aerospace equipment more particularly to a kind of deep camber thin-wall members
Resisting medium external pressure shaping device.
Background technique
Deep camber thin-wall member is a kind of typical shell structure, is usually used in Aeronautics and Astronautics and industrial heat energy engineering
The thermal protection system in field.Currently, process such part frequently with method be to carry out simple soft mode to deformed area to be compressed into
Shape, when blank both ends are without constraint, since blank both ends are in free state, cylinder blank material material is in sticky soft mode material adhesive stress
Under the action of to deformed area flow, if supplement material be greater than surface area increase will be produced under the action of circumferential compression
The defects of raw Instability wrinkling, seriously reduce the surface quality of drip molding；When there is constraint at blank both ends, at blank both ends
The material of non-deformation zone is difficult to flow to deformed area when restrained condition, forming, and the increase of deformed area surface area can only lean on itself
The thinned realization of wall thickness, thus this method is easy to appear Thickness Distribution at deformed area minimum diameter and unevenly, locally seriously subtracts
It is thin, even rupture.External pressure multi-step forming can also be passed through: i.e. increase processing times substep shapes, and controls single pass heavy deformation
In within the scope of Instability wrinkling, required part shape is gradually shaped, due to increasing processing times, mold is complicated, shapes frequency
It is numerous, forming accuracy is poor, at high cost.
In addition, the patent CN104226777A that we applies discloses a kind of " deep camber thin-wall member resisting medium external pressure
Manufacturing process ", the invention provide a kind of effective external pressure shaping method for deep camber thin-wall member.Viscous pressure forming
The characteristics of be that resisting medium can be formed simultaneously normal pressure and tangential adhesive attachment stress, the area forming process Zhong Duige to plate
It is the key that viscous pressure forming that the forming force in domain, which carries out reasonable control,.However lack corresponding forming device.
Summary of the invention
To solve the above-mentioned problems, the present invention provides a kind of deep camber thin-wall member resisting medium external pressure shaping devices.
The purpose of the present invention is implemented with the following technical solutions:
A kind of deep camber thin-wall member resisting medium external pressure shaping device, device include resisting medium injection load mould, type
Mould, mandrel and resisting medium inject cylinder, and the pattern is placed in resisting medium injection load mould, and the mandrel is placed in pattern
Portion, the resisting medium injection cylinder are placed in resisting medium injection load mould bottom, load to resisting medium.Device further includes
It loads mould sealing ring, resisting medium load power source hydraulic cylinder and resisting medium injection load mould end part seal and loads power source liquid
Cylinder pressure, the resisting medium load power source hydraulic cylinder are placed in resisting medium injection cylinder bottom portion, add in resisting medium injection
It carries and resisting medium injection channel is set in mould, the channel entrance and the resisting medium of the lower end of the resisting medium injection channel
The dielectric cavity connection of cylinder is injected, cylinder blank is placed between resisting medium injection load mould and pattern, and resisting medium is logical by injection
The channel outlet in road provides pressure needed for cylinder blank shapes, and load is arranged on the inner wall that the resisting medium injects load mould
Modular ring slot, the setting load mould sealing ring in the load modular ring slot, and be respectively provided with described in one in the upper and lower ends of cylinder blank
Mould sealing ring is loaded, forming device is sealed, plunger is set in the resisting medium injection cylinder, and the plunger is by described viscous
Property coated by dielectric power source Driven by Hydraulic Cylinder, resisting medium injection load mould end part seal load power source hydraulic cylinder is viscous
Property medium injection load mould end part seal loading force is provided, resisting medium injection load mould end part seal loads power source liquid
Cylinder pressure is placed at the top of resisting medium injection load mould.
Preferably, the resisting medium injection cylinder is process using mould steel, and the resisting medium injection cylinder includes interior
Cylinder and housing, inner casing wall thickness W are 20mm~40mm, housing wall thickness a × W, and wherein coefficient a is 1.2~3.5, resisting medium injection
The diameter of the inner hole of cylinder is Φ, and the height that resisting medium injects cylinder is H, and the value range of the diameter of phi is 50mm~80mm,
The value range of the height H is 300mm~600mm.
Preferably, the injection channel is distributed uniformly and circumferentially, the number of injection channel according to pattern shape and at
Shape part wall thickness determines.
Preferably, the diameter of the injection channel isThe diameterValue range be 5mm~10mm.
Preferably, the settable multiple groups Horizontal Exit of shape of each injection channel on different height according to pattern.
Preferably, the structure of the pattern use split-type structure, the mandrel for combine, stationary mould.
Preferably, the plunger end of the resisting medium injection cylinder has the groove of width D, to reduce plunger and viscosity
Medium injects the frictional force between cylinder, and the value range of the width D is 2mm~8mm.
Preferably, the setting injection cylinder at the connecting end surface that the resisting medium injects cylinder and resisting medium injection load mould
Annular groove, and the setting injection cylinder sealing ring in the injection cylinder ring slot, the injection cylinder sealing ring are elastic metallic or rubber material
Expect that sealing ring, the load mould sealing ring are YX type elastomer seal circle.
Preferably, the resisting medium on-load pressure be no more than 400MPa, pressure-loaded speed be 0.1MPa/s~
1.2MPa/s。
Preferably, the resisting medium on-load pressure is described by resisting medium load power source hydraulic cylinder loading force F control
Resisting medium injection load mould end part seal load power source hydraulic cylinder loading force F ', power F ' and power F is positively correlated.
Implement above-mentioned technical proposal of the invention, has the advantages that the present invention is deep camber thin-wall member viscosity
Medium external pressure shaping provides a kind of forming device, which provides resisting medium injection pressure by power control system, to viscous
Property coated by dielectric pressure is controlled；Resisting medium is applied to forming blank by injection channel and generates forming force to it, can
According to the injection channel of formation of parts shape and wall thickness setting different number and shape, it can effectively control and be pressed into outside resisting medium
Shape pressure-loaded realizes control plate blank material stress state, makes the reasonable Deformation Flow of plate blank material, improves sheet material forming.The device
Structure is simple, easy to operate, and control stability is preferable, can effectively carry out resisting medium external pressure shaping.
Detailed description of the invention
Fig. 1 is the deep camber thin-wall member resisting medium external pressure shaping apparatus structure schematic diagram in the present invention；
Fig. 2 (a)~Fig. 2 (d) is resisting medium external pressure shaping mould structure and forming process schematic diagram in the present invention；
Fig. 3 is the A-A cross-sectional view of Fig. 2 (a)；
Fig. 4 is resisting medium external pressure shaping mold front view structure cross-sectional view in the specific embodiment of the invention；
Fig. 5 is the resisting medium injection load mode structure schematic diagram in the present invention；
Fig. 6 is the B-B cross-sectional view of Fig. 5；
Fig. 7 is the structural schematic diagram of resisting medium injection cylinder；
Fig. 8 is resisting medium injection cylinder plug structural schematic diagram.
In figure: 1: resisting medium injection load mould；2: pattern；3: mandrel；4: resisting medium injects cylinder；4-1: inner casing；4-
2: housing；5: load mould sealing ring；5-1: injection cylinder sealing ring；6: injection channel；6-1: channel entrance；6-2: channel outlet；
7: cylinder blank；8: resisting medium；9: plunger；10: resisting medium loads power source hydraulic cylinder；11: resisting medium injection load mould
End part seal loads power source hydraulic cylinder.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
Member's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Referring to Fig. 1-Fig. 8, a kind of deep camber thin-wall member resisting medium external pressure shaping device, device includes resisting medium note
Enter to load mould 1, pattern 2, mandrel 3, resisting medium injection cylinder 4, load mould sealing ring 5, cylinder blank 7, resisting medium load power
Source hydraulic cylinder 10 and resisting medium injection load mould end part seal load power source hydraulic cylinder 11.
Pattern 2 is placed in resisting medium injection load mould 1, and the mandrel 3 is placed in 2 middle part of pattern, the resisting medium note
Enter cylinder 4 and be placed in resisting medium injection load 1 bottom of mould, resisting medium is loaded.
Setting load modular ring slot, is arranged in the load modular ring slot on the inner wall that resisting medium injects load mould 1
Mould sealing ring 5 is loaded, cylinder blank 7 is placed between resisting medium injection load mould 1 and pattern 2, and in the upper and lower ends of cylinder blank 7
It is respectively provided with the load mould sealing ring 5, forming device is sealed.
Resisting medium load power source hydraulic cylinder 10 is placed in resisting medium injection 4 bottom of cylinder, injects in the resisting medium
Load mould 1 in be arranged resisting medium injection channel 6, the channel entrance 6-1 of the lower end of the resisting medium injection channel 6 with it is described
Resisting medium injects the dielectric cavity connection of cylinder 4, and resisting medium provides the forming of cylinder blank by the channel outlet 6-2 of injection channel 6
Required pressure, resisting medium, which injects, is arranged plunger 9 in cylinder 4, the plunger 9 loads power source hydraulic cylinder 10 by the resisting medium
Driving.
Referring to Fig. 1, by the movement of forming process control system control resisting medium load power source hydraulic cylinder 10, and with this
The size of accurate control resisting medium injection pressure.
Injecting load mould end part seal load power source hydraulic cylinder 11 by resisting medium is resisting medium injection load 1 end of mould
Portion's sealing provides loading force, and the resisting medium injection load mould end part seal load power source hydraulic cylinder 11 is placed in resisting medium
1 top of injection load mould.
Referring to Fig. 1, the resisting medium injection load mould end part seal is controlled by forming process control system and loads power
The movement of source hydraulic cylinder 11, and with the size of this accurate control resisting medium injection load mould end part seal on-load pressure.
Resisting medium loads 10 loading force F of power source hydraulic cylinder and injects load mould end part seal load with the resisting medium
The increase of 11 loading force F ' of power source hydraulic cylinder and increase, i.e. power F ' and power F are positively correlated.
Wherein, resisting medium on-load pressure is no more than 400MPa, and pressure-loaded speed is 0.1MPa/s~1.2MPa/s.?
This range internal shaping part precision is higher.
(a)~Fig. 2 (d) is resisting medium external pressure shaping mould structure and forming process schematic diagram referring to fig. 2, with putting forth effort
The increase of F ' and power F, resisting medium 8 are injected by injection channel 6, and cylinder blank 7 gradually shapes.
Referring to figs. 5 and 6, injection channel 6 is distributed uniformly and circumferentially, and the number of injection channel 6 is according to 2 shape of pattern
It is determined with formation of parts wall thickness.In a specific embodiment, the number of injection channel 6 is 8~36.Preferably, when part shape
When shape is relatively easy or wall thickness is relatively thick, the number of injection channel 6 is 10；When part shape is relative complex or wall thickness is opposite
When relatively thin, the number of injection channel 6 is 16.The injection channel 6 being arranged in this way is conducive to control resisting medium injection pressure, mentions
High drip molding precision.
Specifically, the diameter of each injection channel 6 isThe diameterValue range be 5mm~10mm.It sets in this way
The injection channel 6 set is conducive to control resisting medium injection pressure, improves drip molding precision.When part wall thickness is relatively thin,
The diameterValue be 6mm.When part wall thickness is relatively thick, the diameterValue be 10mm.So set, having
Conducive to control resisting medium injection pressure, drip molding precision is improved.
Wherein, the settable multiple groups channel outlet 6-2 in injection channel 6, each injection channel 6 is on different height according to pattern
The settable multiple groups horizontal channel of 2 shapes exports 6-2, and the number of channel outlet 6-2 is 2~8.The injection channel 6 being arranged in this way
Be conducive to control resisting medium injection pressure, improve forming accuracy.
Referring to figs. 1 to 4, the structure of pattern 2 use split-type structure, mandrel 3 for combine, stationary mould 2.The setting
It fabricates and installs convenient for mold.
Referring to fig. 4, when 2 structure of pattern is the shape in Fig. 4, sealing structure is located at 2 end of pattern, loads mould sealing ring
5 use YX type elastomer seal circle.
Further, the setting injection cylinder at the connecting end surface that resisting medium injects cylinder 4 and resisting medium injection load mould 1
Annular groove, and in the injection cylinder ring slot setting injection cylinder sealing ring 5-1, the injection cylinder sealing ring 5-1 for elastic metallic or
Rubber material sealing ring.
Referring to Fig. 7, resisting medium is injected cylinder 4 and is processed using mould steel, including inner casing 4-1 and housing 4-2, inner casing wall thickness W,
Housing wall thickness a × W, the W value range are 20mm~40mm, and a value range is 1.2~3.5, and resisting medium injects cylinder
The diameter of 4 inner holes is Φ, and the height that resisting medium injects cylinder 4 is H, and the value range of the diameter of phi is 50mm~80mm, institute
The value range for stating height H is 300mm~600mm.The specific size of resisting medium injection cylinder 4 can be according to specific when specific implementation
Test formation of parts and requirement of experiment setting.
Finally, 9 end of plunger that resisting medium injects cylinder 4 has the groove of width D, referring to Fig. 8 to reduce plunger 9
With the frictional force between resisting medium injection cylinder 4, the value range of the width D is 2mm~8mm.In a particular embodiment, root
According to resisting medium injection cylinder 4 height H and plunger piston portion length consider, groove can be set to it is multiple, preferably two.
Deep camber thin-wall member resisting medium external pressure shaping device through the invention, can provide for aerospace equipment
Stable thin-wall member ensure that total quality and stability.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (10)
1. a kind of deep camber thin-wall member resisting medium external pressure shaping device, device includes resisting medium injection load mould (1), type
Mould (2), mandrel (3) and resisting medium injection cylinder (4), the pattern (2) is placed in resisting medium injection load mould (1), described
Mandrel (3) is placed in the middle part of pattern (2), and resisting medium injection cylinder (4) is placed in resisting medium injection load mould (1) bottom, right
Resisting medium is loaded, it is characterised in that: device further include load mould sealing ring (5), resisting medium load power source it is hydraulic
Cylinder (10) and resisting medium injection load mould end part seal load power source hydraulic cylinder (11), the resisting medium load power source
Hydraulic cylinder (10) is placed in resisting medium injection cylinder (4) bottom, injects in the resisting medium and resisting medium is arranged in load mould (1)
Injection channel (6), the channel entrance (6-1) and the resisting medium of the lower end of the resisting medium injection channel (6) inject cylinder
(4) dielectric cavity connection, cylinder blank (7) are placed between resisting medium injection load mould (1) and pattern (2), and resisting medium passes through
The channel outlet (6-2) of injection channel (6) provides pressure needed for cylinder blank shapes, and injects load mould (1) in the resisting medium
Inner wall on setting load modular ring slot, setting loads mould sealing ring (5) in the load modular ring slot, and in cylinder blank (7)
Upper and lower ends be respectively provided with the load mould sealing ring (5), forming device is sealed, the resisting medium injects cylinder
(4) plunger (9) are set in, the plunger (9) is driven by resisting medium load power source hydraulic cylinder (10), and the viscosity is situated between
Matter, which injects load mould end part seal load power source hydraulic cylinder (11) and injects load mould (1) end part seal for resisting medium and provide, to be added
Power is carried, resisting medium injection load mould end part seal load power source hydraulic cylinder (11) is placed in resisting medium injection load mould
(1) top.
2. a kind of deep camber thin-wall member resisting medium external pressure shaping device according to claim 1, it is characterised in that: institute
It states resisting medium injection cylinder (4) to be process using mould steel, resisting medium injection cylinder (4) includes inner casing (4-1) and outside
It covers (4-2), inner casing wall thickness W is 20mm~40mm, housing wall thickness a × W, and wherein coefficient a is 1.2~3.5, and resisting medium injects cylinder
(4) diameter of inner hole is Φ, and the height that resisting medium injects cylinder (4) is H, the value range of the diameter of phi be 50mm~
The value range of 80mm, the height H are 300mm~600mm.
3. a kind of deep camber thin-wall member resisting medium external pressure shaping device according to claim 1 or 2, feature exist
In: the injection channel (6) is distributed uniformly and circumferentially, and the number of injection channel (6) is according to pattern (2) shape and forming zero
Part wall thickness determines.
4. a kind of deep camber thin-wall member resisting medium external pressure shaping device according to claim 3, it is characterised in that: institute
The diameter for stating injection channel (6) isThe diameterValue range be 5mm~10mm.
5. a kind of deep camber thin-wall member resisting medium external pressure shaping device according to claim 1,2 or 4, feature exist
In: shape settable multiple groups Horizontal Exit (6-2) of each injection channel (6) on different height according to pattern (2).
6. a kind of deep camber thin-wall member resisting medium external pressure shaping device according to claim 5, it is characterised in that: institute
The structure of pattern (2) is stated using split-type structure, the mandrel (3) for combining, stationary mould (2).
7. according to claim 1, a kind of deep camber thin-wall member resisting medium external pressure shaping device, feature described in 2,4 or 6
Be: plunger (9) end of the resisting medium injection cylinder has the groove of width D, to reduce plunger (9) and resisting medium
The frictional force between cylinder (4) is injected, the value range of the width D is 2mm~8mm.
8. a kind of deep camber thin-wall member resisting medium external pressure shaping device according to claim 7, it is characterised in that:
Setting injection cylinder ring slot at the connecting end surface of resisting medium injection cylinder (4) and resisting medium injection load mould (1), and in institute
Setting injection cylinder sealing ring (5-1) in injection cylinder ring slot is stated, the injection cylinder sealing ring (5-1) is elastic metallic or rubber material
Sealing ring, the load mould sealing ring (5) are YX type elastomer seal circle.
9. a kind of according to claim 1, deep camber thin-wall member resisting medium external pressure shaping device described in 2,4,6 or 8, special
Sign is: the resisting medium on-load pressure is no more than 400MPa, and pressure-loaded speed is 0.1MPa/s~1.2MPa/s.
10. a kind of deep camber thin-wall member resisting medium external pressure shaping device according to claim 9, it is characterised in that:
The resisting medium on-load pressure is by resisting medium load power source hydraulic cylinder (10) loading force F control, the resisting medium note
Enter to load mould end part seal load power source hydraulic cylinder (11) loading force F ', power F ' and power F to be positively correlated.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910064317.4A CN109676000B (en) | 2019-01-23 | 2019-01-23 | A kind of deep camber thin-wall member resisting medium external pressure shaping device |
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|---|---|---|---|
| CN201910064317.4A CN109676000B (en) | 2019-01-23 | 2019-01-23 | A kind of deep camber thin-wall member resisting medium external pressure shaping device |
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| CN109676000A true CN109676000A (en) | 2019-04-26 |
| CN109676000B CN109676000B (en) | 2019-11-12 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110421055A (en) * | 2019-09-10 | 2019-11-08 | 哈尔滨工业大学 | A kind of high temperature alloy stretch bending curved surface cylindrical part forming device and method for controlling springback |
| CN112845660A (en) * | 2020-12-18 | 2021-05-28 | 北京航星机器制造有限公司 | Welding and air-bulging composite forming method for three-layer aluminum alloy cylindrical part |
| KR102591600B1 (en) * | 2023-05-15 | 2023-10-19 | 주식회사 이노비 | Apparatus for forming groove of roller for conveyors |
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| CN104588440A (en) * | 2014-12-31 | 2015-05-06 | 哈尔滨工业大学 | Device and method for testing non-uniform pressure field of viscous medium during pressure forming |
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| JPS63154231A (en) * | 1986-12-15 | 1988-06-27 | Kobe Steel Ltd | Conical die for liquid operated plastic pipe expansion |
| DE19734277C2 (en) * | 1997-08-07 | 2000-04-20 | Forschungsges Umformtechnik | Device for deep drawing a sheet using a pressure medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110421055A (en) * | 2019-09-10 | 2019-11-08 | 哈尔滨工业大学 | A kind of high temperature alloy stretch bending curved surface cylindrical part forming device and method for controlling springback |
| CN110421055B (en) * | 2019-09-10 | 2020-04-28 | 哈尔滨工业大学 | High-temperature alloy stretch-bending curved surface cylindrical part forming device and springback control method |
| CN112845660A (en) * | 2020-12-18 | 2021-05-28 | 北京航星机器制造有限公司 | Welding and air-bulging composite forming method for three-layer aluminum alloy cylindrical part |
| KR102591600B1 (en) * | 2023-05-15 | 2023-10-19 | 주식회사 이노비 | Apparatus for forming groove of roller for conveyors |
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| Publication number | Publication date |
|---|---|
| CN109676000B (en) | 2019-11-12 |
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