CN107413915B - Bellows with bag forming die with straight-edge section clamping device - Google Patents
Bellows with bag forming die with straight-edge section clamping device Download PDFInfo
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- CN107413915B CN107413915B CN201710671022.4A CN201710671022A CN107413915B CN 107413915 B CN107413915 B CN 107413915B CN 201710671022 A CN201710671022 A CN 201710671022A CN 107413915 B CN107413915 B CN 107413915B
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- clamping device
- straight edge
- edge section
- driving mechanism
- rotary driving
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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
- B21D26/033—Deforming tubular bodies
- B21D26/039—Means for controlling the clamping or opening of the moulds
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Abstract
The utility model provides a bellows that takes straight flange section clamping device has bag forming die, includes the mould lid, is equipped with the clamping device that matches and press from both sides tightly with the straight flange section of tube blank at the mould lid towards the one side in the tube blank fixedly, clamping device include rotary driving mechanism, a plurality of link mechanism and a plurality of chuck, fixedly connected with a plurality of link mechanism on rotary driving mechanism, a plurality of link mechanism are radial in the plane mutually perpendicular with rotary driving mechanism's drive shaft, be connected with the chuck on the link mechanism, through rotary driving mechanism's corotation or reversal, promote the chuck to compress tightly or relax the straight flange section of tube blank. By using the corresponding clamping device, a larger clamping force is provided for the straight edge section of the pipe blank, the circumferential deformation of the straight edge section is increased, the friction force between the straight edge section and the inner side wall of the die is further increased, the force F generated by axial plastic deformation of the pipe blank is effectively overcome, and the straight edge section is prevented from being pulled out of the die in the forming process.
Description
Technical Field
The invention belongs to the technical field of metal corrugated pipe hydraulic forming dies, and relates to a corrugated pipe bag forming die with a straight-edge section clamping device.
Background
The hydraulic forming process of the metal corrugated pipe is divided into a primary wave bulging stage and a die closing forming stage, and in the primary wave bulging stage, the position of a corrugated pipe forming die is kept unchanged, and the corrugated pipe blank (cylinder type) is forced to plastically deform along the circumferential direction and the axial direction of a cylinder by increasing the hydraulic forming pressure in the corrugated pipe blank, so that a primary wave is formed. In the prior forming mode, as shown in fig. 1 and 2, in the forming process of the corrugated pipe, the straight edge section is deformed circumferentially by virtue of internal pressure, is tightly attached to the inner side wall of the mold cover, and is kept fixed by virtue of friction force f exerted on the straight edge section by the mold. The magnitude of this force is primarily dependent on the length of the straight segment. When the forming pressure is increased, the length of the straight edge section of the corrugated pipe is also increased appropriately to improve the friction force F, so that the straight edge section can be prevented from being pulled out of the die cover by the force F generated by axial plastic deformation of the pipe blank. For thick-wall corrugated pipes, the effect of increasing the friction force f by increasing the length of the straight-edge section is limited because of small internal pressure deformation of the straight-edge section, and the tendency of the straight-edge section to be pulled out of the mold cover is difficult to overcome effectively, so that the forming failure is finally caused.
Disclosure of Invention
In order to solve the technical problems, the invention provides the corrugated pipe with the straight edge section clamping device, which is provided with the bag forming die, and the corresponding clamping device is utilized to provide larger clamping force for the straight edge section of the pipe blank, so that the circumferential deformation of the straight edge section is increased, the friction force between the straight edge section and the inner side wall of the die is further increased, the force F generated by axial plastic deformation of the pipe blank is effectively overcome, and the straight edge section is prevented from being pulled out of the die in the forming process.
In order to achieve the technical purpose, the adopted technical scheme is as follows: the corrugated pipe with the straight edge section clamping device comprises a die cover, wherein a clamping device which is matched with and clamped with the straight edge section of a pipe blank is fixedly arranged on one surface of the die cover facing the inside of the pipe blank, the clamping device comprises a rotary driving mechanism, a plurality of connecting rod mechanisms and a plurality of chucks, a driving shaft of the rotary driving mechanism coincides with the central line of the straight edge section of the pipe blank, the plurality of connecting rod mechanisms are fixedly connected to the rotary driving mechanism and are in a plane perpendicular to the driving shaft of the rotary driving mechanism in a radial mode, the connecting rod mechanisms consist of a first curved rod and a second curved rod, one end of the second curved rod is fixedly connected with the driving shaft of the rotary driving mechanism, the other end of the second curved rod is hinged with one end of the first curved rod, the chucks are hinged to the other end of the first curved rod, and the total length of the chucks and the unfolded connecting rod mechanisms is larger than or equal to the radius of the straight edge section of the pipe blank, and the chucks are pushed to compress or relax the straight edge section of the pipe blank through forward rotation or reverse rotation of the rotary driving mechanism.
The clamping device is characterized in that a plurality of guide grooves are formed in the outer edge of an inner cover plate below the clamping device along the radial direction, guide rods are arranged in the guide grooves, one ends of the guide rods are connected with a first curved rod, and the other ends of the guide rods penetrate into the guide grooves.
The first curved rod is hinged with the clamping head through a second pin shaft, one end of the second pin shaft is connected with the first curved rod, and the other end of the second pin shaft penetrates into the guide groove and extends out of the guide groove to be connected with the clamping head.
The plurality of the link mechanisms are uniformly and radially connected with the rotary driving mechanism.
The opposite surface of the chuck and the straight edge section of the tube blank is an arc surface.
The die cover is an upper die cover or a lower die cover.
The invention has the beneficial effects that: the clamping head is driven to move through rotation of the rotary driving mechanism, so that the clamping function of the die on the straight edge section of the corrugated pipe blank is realized, sufficient clamping force is provided for the straight edge section, the circumferential deformation of the straight edge section is increased, the friction force between the straight edge section and the inner side wall of the die is further increased, the force F generated by axial plastic deformation of the pipe blank is overcome, the problem that the straight edge section is pulled out from the die in the forming process is effectively solved, and the forming failure rate is reduced.
Drawings
FIG. 1 is a schematic diagram of a mold type structure of a prior art bellows forming method;
FIG. 2 is a simplified diagram of a straight edge section of a mold pattern of a prior art bellows forming;
FIG. 3 is a schematic view of the structure of the clamping device of the present invention;
FIG. 4 is a schematic top view of the clamping device of the present invention;
FIG. 5 is a schematic view of the inner cover plate structure of the present invention;
FIG. 6 is a schematic diagram of the structure of the present invention;
FIG. 7 is a schematic view of a bellows molding structure according to the present invention;
in the figure: 1. an upper die cover; 2. a chuck; 3. a first curved lever; 4. a pin shaft I; 5. a second bent rod; 6. an inner cover plate; 7. a turntable; 8. an upper cover plate; 9. a rotary driving structure; 10. a support column; 11. a second pin shaft; 12. an oil inlet and outlet path; 13. a hydraulic power device; 14. a tube blank; 15. a middle mold plate; 16. supporting cushion blocks; 17. a clamping device; 18. a guide groove; 19. and (5) a lower die cover.
Detailed Description
As shown in fig. 3, a corrugated pipe with a straight-edge section clamping device comprises a mold cover, wherein a clamping device 17 matched with the straight-edge section of a pipe blank 14 and used for clamping is fixedly arranged on one surface of the mold cover facing the inside of the pipe blank 14, and the clamping device 17 comprises a rotary driving mechanism 9, a plurality of connecting rod mechanisms and a plurality of chucks 2. The rotary driving mechanism 9 provides rotary power, and a swing motor can be adopted and is connected with the hydraulic power device 13 through an oil inlet and outlet way 12.
The mould cover is used for supporting the straight edge section of the pipe blank and the wave of the corrugated pipe end in the corrugated pipe forming process to form an upper mould cover 1 and a lower mould cover 19 for corrugated pipe forming; the die cover, the inner cover plate 6 and the upper cover plate 8 form a shell of the straight-section clamping device, and relevant components of the clamping device are placed in the die cover; the upper cover plate 8 can be opened, and the whole clamping device is taken out.
The driving shaft of the rotary driving mechanism 9 coincides with the center line of the straight edge section of the tube blank 14, a plurality of connecting rod mechanisms are fixedly connected on the rotary driving mechanism 9, the plurality of connecting rod mechanisms are radially positioned in a plane vertical to the driving shaft of the rotary driving mechanism 9, the expansion and contraction of the connecting rod mechanisms are carried out in the plane vertical to the driving shaft of the rotary driving mechanism 9, the connecting rod mechanisms consist of a crank rod I3 and a crank rod II 5, one end of the crank rod II 5 is fixedly connected with the driving shaft of the rotary driving mechanism 9, the other end of the crank rod II 5 is hinged with one end of the crank rod I3, the hinging degree of freedom of the crank rod II 5 and the crank rod I3 is not easy to be excessive, the degree of freedom is slightly more than or equal to 180 degrees, the crank II is hinged with the crank I3 through the pin shaft I4, the other end of the crank I3 is hinged with the clamping head 2, the total length of the clamping head 2 and the unfolded connecting rod mechanism is more than or equal to the radius of the straight edge section of the tube blank 14, namely, the connecting rod mechanism can enable the clamping head 2 to prop against the inner wall of the straight edge section after being unfolded, the crank II 5 is driven to rotate through forward rotation or reverse rotation of the rotary driving mechanism 9, the clamping head 2 is pushed to approach or separate from the inner wall of the die cover through movement transmission of the crank I3, the clamping and loosening functions of the die are further achieved, and the clamping head 2 is pushed to compress or loosen the straight edge section of the tube blank 14.
As shown in fig. 5, a plurality of guide grooves 18 are formed in the outer edge of the inner cover plate 6 below the clamping device 17 along the radial direction, guide rods are arranged in the guide grooves 18, one ends of the guide rods are connected with the first curved rods 3, the other ends of the guide rods penetrate into the guide grooves 18, the guide rods move in the guide grooves 18 through the unfolding and closing of the connecting rod mechanism, namely, the lengths of the guide grooves allow the clamping heads 2 to freely move along the radial direction of the inner cover plate 6 within the allowable range.
The first curved rod 3 is hinged with the clamping head 2 through the second pin shaft 11, one end of the second pin shaft 11 is connected with the first curved rod 3, and the other end of the second pin shaft 11 penetrates into the guide groove 18 and extends out of the guide groove 18 to be connected with the clamping head 2. The second pin 11 is perpendicular to the first curved rod 3 and parallel to the axis of the swing motor, and the chuck 6 is located below the inner cover plate 6.
As shown in fig. 4, a plurality of the above-described link mechanisms are connected to the rotation driving mechanism 9 in a uniform radial shape.
The opposite surfaces of the clamping head 2 and the straight edge section of the tube blank 14 are arc surfaces, the shape of the clamping head is similar to a cuboid, more attaching areas with the tube blank in the clamping process are ensured, and the arc surfaces are designed to have certain roughness requirements.
As shown in fig. 6 and 7, the corrugated pipe is formed by using a corrugated pipe forming die with a straight section clamping device, and the forming process is as follows:
A. and (5) clamping the corrugated pipe blank mould. Starting the hydraulic power device 13, pushing the swing motor to rotate, pulling the chuck 2 to move backwards (away from the direction of the inner side wall of the 1 die cover), putting the tube blank 14 between the chuck 2 and the side wall of the 1 die cover, putting a bag body in the tube blank, providing hydraulic forming pressure by liquid in the bag body, starting the hydraulic power device 13 again after the middle die 15 is positioned, pushing the swing motor to rotate, pulling the chuck 2 to move forwards (close to the direction of the inner side wall of the 1 die cover), and clamping the tube blank.
And B, performing primary wave bulge and die assembly forming by using the bellows body, starting a hydraulic power device 13 after the bellows is formed, pushing a swing motor to rotate, pulling the chuck 2 to move backwards (away from the direction of the inner side wall of the 1 die cover), loosening the straight edge section of the bellows, taking out the bellows, and forming.
Claims (6)
1. The utility model provides a bellows that area straight flange section clamping device has bag forming die which characterized in that: the die cover is fixedly provided with a clamping device (17) which is matched with and clamped by a straight edge section of a tube blank (14) towards one surface in the tube blank (14), the clamping device (17) comprises a rotary driving mechanism (9), a plurality of connecting rod mechanisms and a plurality of chucks (2), a driving shaft of the rotary driving mechanism (9) coincides with the central line of the straight edge section of the tube blank (14), the plurality of connecting rod mechanisms are fixedly connected to the rotary driving mechanism (9), the plurality of connecting rod mechanisms are radially positioned in a plane perpendicular to the driving shaft of the rotary driving mechanism (9), the connecting rod mechanisms are composed of a first crank rod (3) and a second crank rod (5), one end of the second crank rod (5) is fixedly connected with the driving shaft of the rotary driving mechanism (9), the other end of the second crank rod (5) is hinged with one end of the first crank rod (3), the chucks (2) are hinged to the other end of the second crank rod mechanism, the chucks (2) and the total length of the expanded connecting rod mechanisms is larger than or equal to the radius of the straight edge section of the tube blank (14), and the straight edge section of the tube blank (14) is pushed to be compressed by the rotary driving mechanism (9) in a forward or reverse rotation mode.
2. A bellows capsule forming die with straight edge segment clamping device as claimed in claim 1, wherein: the clamping device is characterized in that a plurality of guide grooves (18) are formed in the outer edge of the inner cover plate (6) below the clamping device (17) in the radial direction, guide rods are arranged in the guide grooves (18), one ends of the guide rods are connected with the first curved rods (3), and the other ends of the guide rods penetrate into the guide grooves (18).
3. A bellows with straight edge segment gripping device as claimed in claim 2, wherein the bellows has a bladder forming die characterized by: the first curved rod (3) is hinged with the chuck (2) through a second pin roll (11), one end of the second pin roll (11) is connected with the first curved rod (3), and the other end of the second pin roll (11) penetrates into the guide groove (18) and extends out of the guide groove (18) to be connected with the chuck (2).
4. A bellows capsule forming die with straight edge segment clamping device as claimed in claim 1, wherein: the plurality of the link mechanisms are uniformly and radially connected with the rotary driving mechanism (9).
5. A bellows capsule forming die with straight edge segment clamping device as claimed in claim 1, wherein: the surface of the clamping head (2) opposite to the straight edge section of the tube blank (14) is an arc surface.
6. A bellows capsule forming die with straight edge segment clamping device as claimed in claim 1, wherein: the die cover is an upper die cover (1) or a lower die cover (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710671022.4A CN107413915B (en) | 2017-08-08 | 2017-08-08 | Bellows with bag forming die with straight-edge section clamping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710671022.4A CN107413915B (en) | 2017-08-08 | 2017-08-08 | Bellows with bag forming die with straight-edge section clamping device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107413915A CN107413915A (en) | 2017-12-01 |
| CN107413915B true CN107413915B (en) | 2023-05-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710671022.4A Active CN107413915B (en) | 2017-08-08 | 2017-08-08 | Bellows with bag forming die with straight-edge section clamping device |
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| CN (1) | CN107413915B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117358817B (en) * | 2023-12-07 | 2024-04-16 | 沈阳仪表科学研究院有限公司 | Plastic forming device and plastic forming method for metal corrugated pipe |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH091249A (en) * | 1995-06-20 | 1997-01-07 | Showa Rasenkan Seisakusho:Kk | Formation of metallic bellows for bulging and apparatus for forming metallic bellows |
| JPH10277660A (en) * | 1997-04-11 | 1998-10-20 | Hitachi Ltd | Method and device for hydrostatic forming, manufacture of bellows, and tubular structure |
| CN101367100A (en) * | 2008-08-15 | 2009-02-18 | 芜湖浩达金属制品有限公司 | Copper corrugated pipe helical corrugation forming apparatus and forming process |
| CN101418878A (en) * | 2008-11-28 | 2009-04-29 | 王刚 | Method for manufacturing titan and titan alloy bellows |
| CN106040811A (en) * | 2016-07-14 | 2016-10-26 | 燕山大学 | Large-diameter corrugated pipe vibration forming device and method |
| CN106090453A (en) * | 2016-08-30 | 2016-11-09 | 洛阳双瑞特种装备有限公司 | A kind of variable-diameter corrugated pipe and forming method thereof |
| CN207222669U (en) * | 2017-08-08 | 2018-04-13 | 洛阳双瑞特种装备有限公司 | A kind of bellows with straight section clamping device has capsule shaping dies |
-
2017
- 2017-08-08 CN CN201710671022.4A patent/CN107413915B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH091249A (en) * | 1995-06-20 | 1997-01-07 | Showa Rasenkan Seisakusho:Kk | Formation of metallic bellows for bulging and apparatus for forming metallic bellows |
| JPH10277660A (en) * | 1997-04-11 | 1998-10-20 | Hitachi Ltd | Method and device for hydrostatic forming, manufacture of bellows, and tubular structure |
| CN101367100A (en) * | 2008-08-15 | 2009-02-18 | 芜湖浩达金属制品有限公司 | Copper corrugated pipe helical corrugation forming apparatus and forming process |
| CN101418878A (en) * | 2008-11-28 | 2009-04-29 | 王刚 | Method for manufacturing titan and titan alloy bellows |
| CN106040811A (en) * | 2016-07-14 | 2016-10-26 | 燕山大学 | Large-diameter corrugated pipe vibration forming device and method |
| CN106090453A (en) * | 2016-08-30 | 2016-11-09 | 洛阳双瑞特种装备有限公司 | A kind of variable-diameter corrugated pipe and forming method thereof |
| CN207222669U (en) * | 2017-08-08 | 2018-04-13 | 洛阳双瑞特种装备有限公司 | A kind of bellows with straight section clamping device has capsule shaping dies |
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| CN107413915A (en) | 2017-12-01 |
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Address after: No.88, Binhe North Road, hi tech Zone, Luoyang City, Henan Province Applicant after: CSSC Shuangrui (Luoyang) special equipment Co.,Ltd. Address before: No.88, Binhe North Road, hi tech Zone, Luoyang City, Henan Province Applicant before: LUOYANG SUNRUI SPECIAL EQUIPMENT Co.,Ltd. |
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