CN114160666A - Thin-wall stainless steel clamping and pressing pipe fitting forming device - Google Patents
Thin-wall stainless steel clamping and pressing pipe fitting forming device Download PDFInfo
- Publication number
- CN114160666A CN114160666A CN202111327501.7A CN202111327501A CN114160666A CN 114160666 A CN114160666 A CN 114160666A CN 202111327501 A CN202111327501 A CN 202111327501A CN 114160666 A CN114160666 A CN 114160666A
- Authority
- CN
- China
- Prior art keywords
- pipe fitting
- pressure oil
- forming device
- thin
- stainless steel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 15
- 239000010935 stainless steel Substances 0.000 title claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 27
- 238000007493 shaping process Methods 0.000 claims abstract description 18
- 238000007789 sealing Methods 0.000 claims description 10
- 239000013013 elastic material Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000008602 contraction Effects 0.000 abstract description 3
- 230000006837 decompression Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 6
- 238000000465 moulding Methods 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- B21D31/00—Other methods for working sheet metal, metal tubes, metal profiles
- B21D31/04—Expanding other than provided for in groups B21D1/00 - B21D28/00, e.g. for making expanded metal
-
- 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
-
- 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
- B21D26/035—Deforming tubular bodies including an additional treatment performed by fluid pressure, e.g. perforating
-
- 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
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/001—Shaping combined with punching, e.g. stamping and perforating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
Abstract
The invention discloses a thin-wall stainless steel clamping and pressing pipe fitting forming device, which comprises a pipe fitting, a die for positioning the pipe fitting and a workbench, and has the beneficial effects that: the invention has the beneficial effects that: 1. the piston rod is ejected out, the punch is inserted into the pipe fitting fixed in the die to expand the hole, then the second high-pressure oil way is decompressed, the first high-pressure oil way injects high-pressure oil into the liquid bag to enable the high-pressure oil to swell and extrude the inner wall of the pipe fitting, finally, the pipe fitting forms an arc bulge under the limitation of the outer contour cavity, and in the deformation process of the arc bulge, the liquid bag extrudes the inner wall of the pipe fitting, so the length of the pipe fitting is shortened, and the pipe fitting is matched with the shaping cylinder in a tight inserting sleeve manner when being expanded, so the piston rod and the heading ring in the decompression state can be pulled to extrude towards the contraction direction of the pipe fitting, the wall thickness of the arc bulge is compensated, and the thinning of the pipe wall of the arc bulge part is avoided.
Description
The technical field is as follows:
the invention relates to the field of shaping of thin-wall stainless steel pipes, in particular to a forming device for a thin-wall stainless steel clamping and pressing pipe.
Background art:
when an existing thin-wall stainless steel pipe fitting is shaped, the pipe fitting is fixed through a mold, high-pressure water is injected into the pipe fitting to enable the pipe fitting to deform and adhere to the inner wall of a mold cavity of the mold, and the purpose of shaping the pipe fitting is achieved.
The invention content is as follows:
the invention aims to solve the existing problems and provides a thin-wall stainless steel clamping and pressing pipe fitting forming device.
The technical solution of the invention is as follows:
the utility model provides a pipe fitting forming device is pressed to thin wall stainless steel card, includes the mould and the workstation of pipe fitting, location pipe fitting, forming device includes that portable cylinder body that sets up on the workstation sets up a plurality of piston rods on the cylinder body, is fixed in plastic cylinder on the piston rod, be provided with reaming portion and bulging portion on the plastic cylinder, the reaming portion is for being fixed in the drift at plastic cylinder top, bulging portion for fixing the liquid bag on the plastic cylinder, communicate in the first high-pressure oil circuit of liquid bag, the both sides of liquid bag are provided with seal assembly, the top surface of piston rod is fixed with the mound ring that cup joints with the plastic cylinder, the outline die cavity of pipe fitting after the plastic is constituteed jointly to the inner chamber of mould and mound ring.
Preferably, a second high-pressure oil passage is provided below the piston rod to drive the piston rod.
Preferably, the pressure of the first high-pressure oil passage is 90 to 140Mpa, and the pressure of the second high-pressure oil passage is 20 to 30 Mpa.
Preferably, the liquid bag is made of high-pressure-resistant elastic materials, and the liquid bag extrudes the pipe fitting to deform and fit the outer contour cavity under the filling of high-pressure oil so as to form the arc-shaped bulge.
Preferably, the sealing assembly comprises an O-ring and a sealing ring which are respectively arranged at two sides of the liquid bag.
Preferably, the mold comprises an upper mold and a lower mold which can be opened and closed.
The invention has the beneficial effects that: 1. the piston rod is pushed out through the pressurization of the second high-pressure oil path, the punch is inserted into the pipe fitting fixed in the die for reaming, then the second high-pressure oil path is decompressed, high-pressure oil is injected into the liquid bag by the first high-pressure oil path to bulge and extrude the inner wall of the pipe fitting, finally, the pipe fitting forms an arc-shaped bulge under the limitation of the outer contour cavity, the liquid bag bulges and extrudes the inner wall of the pipe fitting, and the heading ring is pulled to move towards the direction of the pipe fitting along with the contraction of the pipe fitting in the extrusion process until the heading ring is attached to the end face of the die cavity after die assembly, so that the wall thickness of the arc-shaped bulge is compensated, and the pipe wall of the arc-shaped bulge is prevented from being too thin;
2. the high-pressure oil in the liquid bag can be recycled and cannot be lost, so that the cleanness of the working environment is ensured;
3. the forming devices are arranged to carry out multi-station pipe fitting shaping operation.
Description of the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2;
FIG. 4 is a schematic cross-sectional view of a molding apparatus of the present invention;
FIG. 5 is a schematic left side view of the molding apparatus of the present invention;
FIG. 6 is a schematic top view of a molding apparatus of the present invention;
FIG. 7 is a perspective view of the tube of the present invention;
in the drawings: 1. a pipe fitting; 2. a cylinder body; 3. a piston rod; 4. shaping the column; 5. a punch; 6. a liquid sac; 7. a first high-pressure oil passage; 8. upsetting a material ring; 9. an outer contour cavity; 10. a second high-pressure oil passage; 11. an arc-shaped bulge; 12. an O-shaped ring; 13. a seal ring; 14. an upper die; 15. a lower die; 16. a work bench.
The specific implementation mode is as follows:
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 will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1-7, the forming device of the thin-wall stainless steel clamping and pressing pipe fitting comprises a pipe fitting 1, a mould for positioning the pipe fitting and a workbench 16, the forming device comprises a cylinder body 2 which can be movably arranged on a workbench 16, a plurality of piston rods 3 which are arranged on the cylinder body 2, a shaping cylinder 4 which is fixed on the piston rods 3, the shaping cylinder 4 is provided with a reaming part and a bulging part, the reaming part is a punch 5 fixed at the top of the shaping cylinder 4, the drum hole part is a liquid bag 6 fixed on the shaping column 4, the shaping column 4 is provided with a ring groove for installing the liquid bag 6 and a sealing component, a first high-pressure oil path 7 communicated with the liquid bag 6, sealing components are arranged on two sides of the liquid bag 6, a heading ring 8 which is sleeved with the shaping column 4 is fixed on the top surface of the piston rod 3, the inner cavities of the die and the material upsetting ring 8 jointly form an outer contour cavity 9 of the shaped pipe fitting 1.
Specifically, a second high-pressure oil passage 10 is provided below the piston rod 3 to drive the piston rod 3.
Specifically, the pressure of the first high-pressure oil passage 7 is 90 to 140Mpa, and the pressure of the second high-pressure oil passage 10 is 20 to 30 Mpa.
Specifically, the liquid bag 6 is made of a high-pressure-resistant elastic material, and the liquid bag extrudes the pipe fitting 1 to deform and fit the outer contour cavity 9 under the filling of high-pressure oil so as to form the arc-shaped protrusion 11.
Specifically, the sealing assembly comprises an O-ring 12 and a sealing ring 13 which are respectively arranged on two sides of the liquid bag 6, and the sealing assembly not only can position the liquid bag 6, but also can play a role in sealing.
Specifically, the mold includes an upper mold 14 and a lower mold 15 that can be opened and closed up and down.
The working principle is as follows: the pipe fitting 1 is arranged in a lower die, the pipe fitting 1 is fixed by closing the upper die and the lower die, the forming device can be respectively arranged at two ends of the pipe fitting 1 for simultaneously shaping, the cylinder body 2 moves to a designated position, the second high-pressure oil path 10 is pressurized, the piston rod 3 is ejected out to drive the punch 5 to be inserted into an inner hole of the pipe fitting 1 to a designated depth for reaming, at the moment, the end surface of the material upsetting ring 8 is not contacted with the end surface of the inner cavity of the die after closing the die, the pressure of the second high-pressure oil path 10 is released, the first high-pressure oil path 7 is pressurized, the liquid bag 6 swells and extrudes the inner wall of the pipe fitting 1, the material upsetting ring 8 is pulled to move towards the pipe fitting 1 along with the contraction of the pipe fitting 1 in the extrusion process until the material upsetting ring is attached to the end surface of the inner cavity of the die after closing the die so as to compensate the wall thickness of the arc-shaped bulge 11 and avoid the over-thin pipe wall at the part of the upper die, the lower die and under the limit of the outer contour 9 formed by the inner cavity of the material ring 8, the outer wall of the pipe fitting 1 is formed with an arc-shaped protrusion 11.
The foregoing is only for the purpose of understanding the method and the core concept of the present invention, and it should be noted that modifications and variations can be made by those skilled in the art without departing from the principle of the present invention, and these modifications and variations also fall into the protection scope of the appended claims.
Claims (6)
1. The utility model provides a pipe fitting forming device is pressed to thin wall stainless steel card, includes the mould and the workstation of pipe fitting, location pipe fitting, its characterized in that: forming device sets up a plurality of piston rods on the cylinder body including portable cylinder body that sets up on the workstation, is fixed in shaping cylinder on the piston rod, be provided with reaming portion and drum hole portion on the shaping cylinder, the reaming portion is for being fixed in the drift at shaping cylinder top, drum hole portion is for fixing the liquid bag on the shaping cylinder, communicate in the first high-pressure oil circuit of liquid bag, the both sides of liquid bag are provided with seal assembly, the top surface of piston rod is fixed with the mound ring that cup joints with the shaping cylinder, the outline die cavity of shaping back pipe fitting is constituteed jointly to the inner chamber of mould and mound ring.
2. The thin-walled stainless steel pipe clamping and pressing forming device of claim 1, wherein: and a second high-pressure oil way is arranged below the piston rod to drive the piston rod.
3. The thin-walled stainless steel pipe clamping and pressing forming device of claim 2, wherein: the pressure of the first high-pressure oil way is 90-140Mpa, and the pressure of the second high-pressure oil way is 20-30 Mpa.
4. The thin-walled stainless steel pipe clamping and pressing forming device of claim 1, wherein: the liquid bag is made of high-pressure-resistant elastic materials, and the liquid bag extrudes the pipe fitting to deform and fit the outer contour cavity under the filling of high-pressure oil so as to form an arc-shaped bulge.
5. The thin-walled stainless steel pipe clamping and pressing forming device of claim 1, wherein: the sealing assembly comprises an O-shaped ring and a sealing ring which are respectively arranged on two sides of the liquid bag.
6. The thin-walled stainless steel pipe clamping and pressing forming device of claim 1, wherein: the mould comprises an upper mould and a lower mould which can be opened and closed up and down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111327501.7A CN114160666A (en) | 2021-11-10 | 2021-11-10 | Thin-wall stainless steel clamping and pressing pipe fitting forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111327501.7A CN114160666A (en) | 2021-11-10 | 2021-11-10 | Thin-wall stainless steel clamping and pressing pipe fitting forming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114160666A true CN114160666A (en) | 2022-03-11 |
Family
ID=80478562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111327501.7A Pending CN114160666A (en) | 2021-11-10 | 2021-11-10 | Thin-wall stainless steel clamping and pressing pipe fitting forming device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114160666A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114850277A (en) * | 2022-05-24 | 2022-08-05 | 嘉兴巨盈金属制品有限公司 | Hydraulic machine for machining shaft sleeve type parts and machining process |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010064338A (en) * | 1999-12-29 | 2001-07-09 | 이구택 | Tube hydroformability tester and test method |
| JP2009121528A (en) * | 2007-11-12 | 2009-06-04 | Riken Corp | Flange type pipe joint and steel pipe expanded portion forming device |
| JP2011218659A (en) * | 2010-04-08 | 2011-11-04 | Mitsubishi Electric Corp | Molding apparatus and molding method |
| CN102806262A (en) * | 2012-08-06 | 2012-12-05 | 哈尔滨工业大学 | Device and method for axial loading to assist bulging of magnetic pulse pipe |
| KR20170048823A (en) * | 2015-10-27 | 2017-05-10 | 세종공업 주식회사 | Hydroforming apparatus for tube |
| CN206215732U (en) * | 2016-11-24 | 2017-06-06 | 一重集团大连设计研究院有限公司 | A kind of internal high pressure forming mould for shaping hierarchic structure pipe fitting |
| CN109201841A (en) * | 2018-09-27 | 2019-01-15 | 哈尔滨工业大学 | A kind of itself part internal pressure forming device and manufacturing process for thin-wall pipe |
| CN110788195A (en) * | 2019-11-07 | 2020-02-14 | 江苏银羊不锈钢管业有限公司 | Stainless steel clamping and pressing pipe fitting forming process |
| CN111974865A (en) * | 2020-07-27 | 2020-11-24 | 佛山市永恒液压机械有限公司 | Pipe forming equipment is pressed to card |
| CN112975308A (en) * | 2021-05-20 | 2021-06-18 | 浙江摩多巴克斯科技股份有限公司 | Processing technology for extrusion molding of pipe end with sealing groove |
| CN214161131U (en) * | 2020-12-24 | 2021-09-10 | 四川长鑫管业有限公司 | Upper part forming die for thin-wall stainless steel pipe fitting |
-
2021
- 2021-11-10 CN CN202111327501.7A patent/CN114160666A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010064338A (en) * | 1999-12-29 | 2001-07-09 | 이구택 | Tube hydroformability tester and test method |
| JP2009121528A (en) * | 2007-11-12 | 2009-06-04 | Riken Corp | Flange type pipe joint and steel pipe expanded portion forming device |
| JP2011218659A (en) * | 2010-04-08 | 2011-11-04 | Mitsubishi Electric Corp | Molding apparatus and molding method |
| CN102806262A (en) * | 2012-08-06 | 2012-12-05 | 哈尔滨工业大学 | Device and method for axial loading to assist bulging of magnetic pulse pipe |
| KR20170048823A (en) * | 2015-10-27 | 2017-05-10 | 세종공업 주식회사 | Hydroforming apparatus for tube |
| CN206215732U (en) * | 2016-11-24 | 2017-06-06 | 一重集团大连设计研究院有限公司 | A kind of internal high pressure forming mould for shaping hierarchic structure pipe fitting |
| CN109201841A (en) * | 2018-09-27 | 2019-01-15 | 哈尔滨工业大学 | A kind of itself part internal pressure forming device and manufacturing process for thin-wall pipe |
| CN110788195A (en) * | 2019-11-07 | 2020-02-14 | 江苏银羊不锈钢管业有限公司 | Stainless steel clamping and pressing pipe fitting forming process |
| CN111974865A (en) * | 2020-07-27 | 2020-11-24 | 佛山市永恒液压机械有限公司 | Pipe forming equipment is pressed to card |
| CN214161131U (en) * | 2020-12-24 | 2021-09-10 | 四川长鑫管业有限公司 | Upper part forming die for thin-wall stainless steel pipe fitting |
| CN112975308A (en) * | 2021-05-20 | 2021-06-18 | 浙江摩多巴克斯科技股份有限公司 | Processing technology for extrusion molding of pipe end with sealing groove |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114850277A (en) * | 2022-05-24 | 2022-08-05 | 嘉兴巨盈金属制品有限公司 | Hydraulic machine for machining shaft sleeve type parts and machining process |
| CN114850277B (en) * | 2022-05-24 | 2023-10-20 | 嘉兴巨盈金属制品有限公司 | Hydraulic press for machining shaft sleeve type parts and machining process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105234242B (en) | Rubber pocket hydroforming equipment in one kind pipe | |
| CN102764808B (en) | Hydraulic forming device and method of reducing cylindrical part | |
| CN103272879B (en) | Upset-bulge compound internal high pressure forming method and device for long and thin deformed straight pipe | |
| CN102921792B (en) | Composite inner and outer hydraulic pressure forming method for high-branch height thin-wall three-way pipe | |
| CN105562516A (en) | Charging pressing forming method for variable-cross-section special-shaped pipe | |
| CN104741432B (en) | A kind of internal high pressure forming equipment and the technique of shaping | |
| CN104338818A (en) | Internal high pressure forming equipment | |
| CN103920789A (en) | Internal high pressure forming die and method of elbow T-branch pipe | |
| CN104226776B (en) | Thin-wall metal pipe impacts hydraulic expanding-forming system | |
| CN106424293B (en) | A kind of hydraulic shock building mortion and manufacturing process for metal thin wall pipe | |
| US6439018B1 (en) | Device and method for expansion forming | |
| CN107052124A (en) | A kind of method for bending thin-wall rectangular section tubing | |
| CN102500710A (en) | Automatic tee shaping equipment and shaping method thereof | |
| CN106270102A (en) | A kind of method mating internal high pressure forming threeway overpressure and feeding relation | |
| CN114160666A (en) | Thin-wall stainless steel clamping and pressing pipe fitting forming device | |
| CN106270103B (en) | A kind of internal high pressure forming die and its application method | |
| CN103317005B (en) | Non-thinning upsetting forming method for variable-diameter pipe and device thereof | |
| CN204448967U (en) | A kind of pipe fitting internal high pressure forming device | |
| CN103691794A (en) | Self-pressurization forming method for hollow parts | |
| CN106378376B (en) | A kind of multistage sealing device of interior high-pressure molding | |
| CN103521586B (en) | Stainless steel tube shaped device | |
| CN206382396U (en) | High-pressure dynamic seal device | |
| CN201659188U (en) | Sealing punch of internal high pressure forming tube end part | |
| CN207057369U (en) | For the fittings hydraulic formation equipment with small round corner bulge loop | |
| CN206169021U (en) | Multistage sealing device of internal high -pressure forming |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |