CN113426876A - Expansion die structure and pipe internal high-pressure one-step forming machine - Google Patents
Expansion die structure and pipe internal high-pressure one-step forming machine Download PDFInfo
- Publication number
- CN113426876A CN113426876A CN202110809444.XA CN202110809444A CN113426876A CN 113426876 A CN113426876 A CN 113426876A CN 202110809444 A CN202110809444 A CN 202110809444A CN 113426876 A CN113426876 A CN 113426876A
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- Prior art keywords
- cylinder
- conical
- die structure
- cavity
- sealing
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Links
- 238000007789 sealing Methods 0.000 claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 230000007246 mechanism Effects 0.000 claims abstract description 18
- 229910000906 Bronze Inorganic materials 0.000 claims description 21
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 21
- 239000010974 bronze Substances 0.000 claims description 21
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims description 21
- 230000003028 elevating effect Effects 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 238000001125 extrusion Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Images
Classifications
-
- 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
- B21D26/047—Mould construction
-
- 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
- B21D26/045—Closing or sealing means
Abstract
The invention discloses an expansion die structure and a pipe internal high-pressure one-step forming machine, which comprises an upper die plate, a lower die plate and a sealing mechanism, wherein the upper die plate and the lower die plate form a cavity after being matched, two ends of a cavity are provided with conical water sealing ports, the two sealing mechanisms are symmetrically arranged on two sides of the cavity, each sealing mechanism comprises a side cylinder and a conical head, the conical heads and the conical water sealing ports are coaxially arranged, and are driven by the side cylinders to move left and right; the expansion type die structure is arranged on one side of the pressure cylinder and is connected with the pressure cylinder through the rigid connecting pipe, and the high-pressure one-step forming machine in the pipe has the advantages of high efficiency and low cost.
Description
Technical Field
The invention belongs to the technical field of pipe forming machines, and particularly relates to an expansion die structure and a pipe internal high-pressure one-step forming machine.
Background
The high-pressure forming process in the tube is one of thirteen international special advanced forming processes; the method is suitable for forming special-shaped variable cross-section pipes, multi-way pipes, variable-axis pipes and other complex pipes in the aerospace industry, the marine equipment industry, the automobile industry, the household appliance industry and other industries. Wherein, like the screw thread on products such as heat preservation ware, because the size of screw thread is less can not one shot forming, needs a plurality of processes cooperation, has the shortcoming that production efficiency is low and the processing cost is high.
Disclosure of Invention
The invention aims to provide an expansion die structure and a pipe internal high-pressure one-step forming machine which can solve the problems.
In order to achieve the purpose, the technical scheme of the invention is as follows: the expanding die structure comprises an upper die plate, a lower die plate and a sealing mechanism, wherein the upper die plate and the lower die plate form a cavity after die assembly, two ends of a cavity are provided with conical water sealing ports, the two sealing mechanisms are symmetrically arranged on two sides of the cavity, the sealing mechanism comprises a side cylinder and a conical head, the conical head and the conical water sealing ports are coaxially arranged, the conical head is driven by the side cylinder to move left and right, the front end of the conical head is matched with a pipe, and the conical head extrudes the pipe orifice of the pipe to enable the pipe orifice to be tightly attached to the conical water sealing ports to form a reinforced sealing area.
Preferably, at least two cavities can be provided in the cavity.
Preferably, the taper of the tapered water sealing opening is 15 degrees.
Preferably, the conical head comprises a combining part and a pressing part, a raised head is arranged at the tail end of the pressing part, a notch matched with the raised head is formed in the combining part, and the raised head abuts against the notch through a tin bronze washer.
Preferably, an arc-shaped chamfer is formed at the edge of the front end of the extrusion part.
Preferably, the cone head and the movable rod of one of the side cylinders are provided with corresponding through holes to form a water injection channel.
Preferably, still include elevating system, elevating system includes mounting panel, hydro-cylinder, connecting plate and guide post, the guide post is provided with four and mutual symmetries, the one end fixed connection of guide post is in on the mounting panel, the connecting plate with guide post sliding connection and fixed connection are in on the movable rod of hydro-cylinder, cope match-plate pattern fixed connection is in on the connecting plate.
The invention also provides a pipe internal high-pressure one-step forming machine, which comprises a frame and also comprises:
the pressurizing cylinder is used for injecting water and is movably arranged on the rack; and
the expansion die structure is arranged on one side of the pressure cylinder and is connected with the pressure cylinder through a rigid connecting pipe.
Compared with the prior art, the invention has the beneficial effects that: the upper template and the lower template are driven to be matched through the lifting mechanism to form a cavity, at least two cavities are arranged in the cavity, the pipe is arranged in the cavities, further, the side cylinder drives the conical head to extrude the pipe orifice of the pipe to enable the pipe orifice to be tightly attached to the conical water sealing port to form a reinforced sealing area, further, the pressurizing cylinder injects liquid into the pipe to enable the pipe to be expanded to be formed in one step, and the high-pressure one-step forming machine in the pipe has the advantages of high efficiency and low cost.
Drawings
Fig. 1 is a sectional view of the expanding die structure of the present invention.
FIG. 2 is a partial enlarged view of the present invention at B.
Fig. 3 is a schematic structural diagram of the cone head of the present invention.
FIG. 4 is a schematic structural view of the high-pressure one-step molding machine in a tube of the present invention.
Fig. 5 is a partial cross-sectional view of the present invention.
Fig. 6 is a sectional view of the booster cylinder of the present invention.
Fig. 7 is a partially enlarged view of the present invention at a.
In the figure: the mold comprises a frame 10, an expansion mold structure 20, an upper mold plate 201, a lower mold plate 202, a sealing mechanism 203, side cylinders (2031a, 2031b), a cavity 204, a cavity 2041, a tapered water sealing port 205, a lifting mechanism 30, a mounting plate 301, an oil cylinder 302, a connecting plate 303, a guide column 304, a conical head 2032, a joint 2033, an extrusion 2034, a raised head 2035, a notch 2036, an arc chamfer 2037, a tin bronze gasket 40, a pressure cylinder 50, a connecting flange 501, an oil cylinder 502, a water cylinder 503, a piston rod 504, a water draining part 505, a first fixing flange 506, a second fixing flange 507, a measuring rod 508, a cylinder cover 509, a water injection channel 60, a rigid connecting pipe 70, a sealing structure 80, a first tin bronze sleeve 801, a first guide ring 802, a second tin bronze sleeve 803 and a second guide ring 804.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
As shown in fig. 1 to 7, an embodiment of the present invention provides an expansion mold structure 20, which includes an upper mold plate 201, a lower mold plate 202, and a sealing mechanism 203, where the upper mold plate 201 and the lower mold plate 202 are clamped to form a cavity 204, two ends of the cavity 204 are provided with tapered water sealing ports 205, the two sealing mechanisms 203 are symmetrically disposed on two sides of the cavity 204, the sealing mechanism 203 includes side cylinders (2031a, 2031b) and a cone head 2032, the cone head 2032 and the tapered water sealing ports 205 are coaxially disposed, the cone head 2032 is driven by the side cylinders (2031a, 1b) to move left and right, wherein a front end of the cone head 2032 is matched with a pipe, and the cone head 2032 extrudes a pipe orifice of the pipe to be tightly attached to the tapered water sealing port 205 to form a reinforced sealing area, so as to reinforce the sealing area to improve a sealing effect at a connection and prevent liquid leakage.
Further, at least two cavities 2041 can be arranged in the cavity 204, that is, two heat preservation vessels can be formed simultaneously, and the production efficiency is effectively improved.
In this embodiment, the taper of the tapered water sealing opening 205 is 15 degrees, and this taper can make the fitting degree of the tapered head 2032 better, which is beneficial to the sealing effect.
In this embodiment, the conical head 2032 includes a combining portion 2033 and a pressing portion 2034, a nose 2035 is disposed at a tail end of the pressing portion 2034, a recess 2036 adapted to the nose 2035 is disposed on the combining portion 2033, and the nose 2035 abuts against the recess 2036 through a tin bronze washer 40. The joint 2033 and the pressing portion 2034 are welded together, and the tin bronze washer 40 is provided to compensate for the gap generated around the joint in the ultra-high pressure environment.
In this embodiment, an arc-shaped chamfer 2037 is formed at the front end edge of the pressing portion 2034. The major diameter of the curved chamfer 2037 is the same as the inner diameter of the orifice of the tubing, so that the conical head 2032 can extrude the tubing.
In this embodiment, the cone head 2032 and the movable rod of one of the side cylinders 2031a are all provided with corresponding through holes to form a water injection channel 60.
In this embodiment, in order to realize that the lifting mechanism 30 can drive the upper mold plate 201 to open and close the mold; the invention further comprises a lifting mechanism, wherein the lifting mechanism 30 comprises a mounting plate 301, an oil cylinder 302, a connecting plate 303 and guide posts 304, the four guide posts 304 are symmetrical to each other, one end of each guide post 304 is fixedly connected to the mounting plate 301 through a nut, the connecting plate 303 is slidably connected to the guide posts 304 through guide sleeves, the connecting plate 303 is fixedly connected to movable rods of the oil cylinder 302 through connecting nuts, and the upper template 201 is fixedly connected to the connecting plate 303 through bolts. Namely, the upper die plate 201 fixedly connected to the connecting plate 303 can be driven to move up and down by the oil cylinder 302.
The invention also provides another preferred embodiment, the pipe internal high-pressure one-step forming machine comprises a frame 10, and further comprises:
the pressurizing cylinder 50 is used for injecting water, the pressurizing cylinder 50 is movably arranged on the rack 10, specifically, two guide rails are embedded on the rack 10, sliding blocks are matched on the guide rails, and the pressurizing cylinder 50 is fixedly connected to the sliding blocks to realize movement; and
the expansion die structure 20 is arranged on one side of the pressure cylinder 50, and the expansion die structure 20 is connected with the pressure cylinder 50 through a rigid connecting pipe 70.
The expansion die structure 20 and the pressure cylinder 50 are matched to realize one-step molding of the pipe; the output pressure of the booster cylinder 50 can reach 200 to 400 Mpa.
The structure of the pressure cylinder 50 is specifically as follows:
the pressure cylinder 50 comprises a connecting flange 501, an oil cylinder 502, a water cylinder 503, a piston rod 504 and a drainage piece 505; the oil cylinder 502 and the water cylinder 503 are respectively and fixedly connected to two ends of the connecting flange 501 through first fixing flanges 506, the two first fixing flanges 506 are welded on the oil cylinder 502 and the water cylinder 503, and the two first fixing flanges 506 are connected with the connecting flange 501 in series through bolts; the drain member 505 is fixedly connected to the lower end of the water tank 503 through a second fixing flange 507, and the second fixing flange 507 is welded to the water tank 503; the piston rod 504 is movably arranged in the connecting flange 501, the oil cylinder 502 and the water cylinder 503; the sealing structure 80 is arranged at the inner connection position of the connecting flange 501 and the water cylinder 503. The first fixing flange 506 and the second fixing flange 507 are provided for the purpose of enhancing the structural stability of the joint and preventing the problem of deformation caused by expansion in an internal ultrahigh pressure environment; the inside of drain 505 is provided with drainage system, drain 505 upper end be provided with jar mouth assorted connector of jar 503, and connect the cover to be equipped with the spacer ring of two looks adaptations on the plush copper, be favorable to improving the sealed effect here, it is further, drainage system has been seted up in the drain 505, wherein, the delivery port is connected to one end of rigid connection pipe 70, and another is connected the movable rod of side jar 2031a, the emulsion by jar 503 via the delivery port rigid connection pipe 70 with realize one shot forming in the awl head 2032 pours into tubular product into.
Further, the sealing structure 80 includes:
the first tin bronze sleeve 801 is tightly connected to the middle end of the inner wall of the connecting flange 501, and a plurality of first guide rings 802 are arranged on the inner wall of the first tin bronze sleeve 801 at intervals;
the second tin bronze sleeve 803 is tightly connected in the upper end opening of the water cylinder 503, a second guide ring 804 is arranged on the inner wall of the second tin bronze sleeve 803, and the upper end of the second tin bronze sleeve 803 abuts against the first tin bronze sleeve 801;
the first guide ring 802 and the second guide ring 804 guide the piston rod 504; the specific assembly positions of the seal structure 80 are as follows:
a first step hole, a second step hole and a third step hole which are used for embedding the first tin bronze sleeve 801 are sequentially arranged on the inner wall of the connecting flange 501 from top to bottom, and further, a fourth step hole which is used for embedding the second tin bronze sleeve 801 is formed in the inner wall of the connecting raised head; in order to enhance the connection tightness between the cylinder 503 and the connecting flange 501 of the oil cylinder 502, a first connecting raised head matched with the oil cylinder 502 is arranged at the upper end of the connecting flange 501, a second connecting raised head matched with a third stepped hole is arranged at the upper end of the cylinder 503, and matched threaded layers are arranged on the inner walls of the cylinder 503, the oil cylinder 502, the first connecting raised head, the second connecting raised head and the third stepped hole;
the tin bronze material is used for effectively compensating the clearance generated at the periphery of the connection position in the ultrahigh-pressure environment due to the flexibility and the wear resistance of the tin bronze.
Further, the head of the piston rod 504 is provided with an installation groove, the installation groove is matched with a measuring rod 508, the upper end of the oil cylinder 502 is provided with a cylinder cover 509, and the measuring rod 508 penetrates through the cylinder cover 509. The cylinder cover 509 is welded at the upper end of the oil cylinder 502, the measuring rod 508 and the mounting groove are assembled in a threaded connection mode, so that the assembly and disassembly are facilitated, the measuring rod 508 is used for measuring a pressure value, and scales are carved on the measuring rod 508.
Preferably, the sealing rings 90 which are matched with each other are arranged at the connection positions of the first tin bronze sleeve 801 and the second tin bronze sleeve 803 with the end faces of the connecting flange 501 and the water cylinder 503, between two adjacent first guide rings 802, at two sides of the second guide ring 804, at the connection position of the water cylinder 503 and the drainage member 505, and at the connection position of the measuring rod 508 and the cylinder head 509. The problem that gaps are generated at the periphery of the sealing ring 90 due to ultrahigh pressure inside the sealing ring is solved through the first tin bronze sleeve 801, the second tin bronze sleeve 803 and the sealing ring 90 which is arranged at the joint of each structure in a matched mode, and the sealing effect is improved.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (8)
1. The expansion die structure is characterized by comprising an upper die plate, a lower die plate and a sealing mechanism, wherein the upper die plate and the lower die plate form a cavity after being closed, conical water sealing ports are formed in two ends of a cavity, the two sealing mechanisms are symmetrically arranged on two sides of the cavity, each sealing mechanism comprises a side cylinder and a conical head, the conical heads are coaxially arranged with the conical water sealing ports, the conical heads are driven by the side cylinders to move left and right, the front ends of the conical heads are matched with pipes, and the conical heads extrude the pipe orifices of the pipes to be tightly attached to the conical water sealing ports to form a reinforced sealing area.
2. The expansion die structure of claim 1, wherein: at least two cavities can be arranged in the cavity.
3. The expansion die structure of claim 1, wherein: the taper of the tapered water sealing opening is 15 degrees.
4. The expansion die structure of claim 1, wherein: the conical head comprises a combining part and an extruding part, a raised head is arranged at the tail end of the extruding part, a notch matched with the raised head is formed in the combining part, and the raised head is abutted to the notch through a tin bronze washer.
5. The expansion die structure of claim 4, wherein: an arc-shaped chamfer is formed at the edge of the front end of the extrusion part.
6. The expansion die structure of claim 4, wherein: the cone head and one of the movable rods of the side cylinders are provided with corresponding through holes to form a water injection channel.
7. The expansion die structure of claim 1, wherein: still include elevating system, elevating system includes mounting panel, hydro-cylinder, connecting plate and guide post, the guide post is provided with four and mutual symmetries, the one end fixed connection of guide post is in on the mounting panel, the connecting plate with guide post sliding connection and fixed connection are in on the movable rod of hydro-cylinder, cope match-plate pattern fixed connection be in on the connecting plate.
8. High pressure one shot forming machine in tubular product, including the frame, its characterized in that still includes:
the pressurizing cylinder is used for injecting water and is movably arranged on the rack; and
an expansion die structure as claimed in any one of claims 1 to 7, disposed on one side of the pressurisation cylinder and connected thereto by a rigid connecting tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110809444.XA CN113426876A (en) | 2021-07-17 | 2021-07-17 | Expansion die structure and pipe internal high-pressure one-step forming machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110809444.XA CN113426876A (en) | 2021-07-17 | 2021-07-17 | Expansion die structure and pipe internal high-pressure one-step forming machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113426876A true CN113426876A (en) | 2021-09-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110809444.XA Pending CN113426876A (en) | 2021-07-17 | 2021-07-17 | Expansion die structure and pipe internal high-pressure one-step forming machine |
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| CN (1) | CN113426876A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10137476A1 (en) * | 2000-12-12 | 2002-06-13 | Stamm Anneliese | Process and device for hydroforming |
| CN104438542A (en) * | 2014-12-08 | 2015-03-25 | 无锡朗贤汽车组件研发中心有限公司 | Inflatable hot forming and sectional strengthening tube-producing equipment |
| US20190060970A1 (en) * | 2017-08-23 | 2019-02-28 | Harbin Institute Of Technology | Method for quick gas bulging forming of hot metal sheet |
| CN210358765U (en) * | 2019-07-05 | 2020-04-21 | 长春智乐机械制造有限公司 | Internal high-pressure forming die |
| CN111957806A (en) * | 2020-10-26 | 2020-11-20 | 浙大宁波理工学院 | Bent pipe forming process for bulging bent pipe |
-
2021
- 2021-07-17 CN CN202110809444.XA patent/CN113426876A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10137476A1 (en) * | 2000-12-12 | 2002-06-13 | Stamm Anneliese | Process and device for hydroforming |
| CN104438542A (en) * | 2014-12-08 | 2015-03-25 | 无锡朗贤汽车组件研发中心有限公司 | Inflatable hot forming and sectional strengthening tube-producing equipment |
| US20190060970A1 (en) * | 2017-08-23 | 2019-02-28 | Harbin Institute Of Technology | Method for quick gas bulging forming of hot metal sheet |
| CN210358765U (en) * | 2019-07-05 | 2020-04-21 | 长春智乐机械制造有限公司 | Internal high-pressure forming die |
| CN111957806A (en) * | 2020-10-26 | 2020-11-20 | 浙大宁波理工学院 | Bent pipe forming process for bulging bent pipe |
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Application publication date: 20210924 |
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