CN108624747B - Aortic stent ring shaping die - Google Patents
Aortic stent ring shaping die Download PDFInfo
- Publication number
- CN108624747B CN108624747B CN201810688046.5A CN201810688046A CN108624747B CN 108624747 B CN108624747 B CN 108624747B CN 201810688046 A CN201810688046 A CN 201810688046A CN 108624747 B CN108624747 B CN 108624747B
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- CN
- China
- Prior art keywords
- cylindrical
- annular
- die
- male die
- female die
- 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.)
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Links
- 238000007493 shaping process Methods 0.000 title claims abstract description 25
- 238000003825 pressing Methods 0.000 claims abstract description 53
- 230000002093 peripheral effect Effects 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 2
- 238000010791 quenching Methods 0.000 claims description 2
- 230000000171 quenching effect Effects 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 208000007474 aortic aneurysm Diseases 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 206010002329 Aneurysm Diseases 0.000 description 1
- 208000025494 Aortic disease Diseases 0.000 description 1
- 206010070693 Vascular dissection Diseases 0.000 description 1
- 230000017531 blood circulation Effects 0.000 description 1
- 238000009954 braiding Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007723 die pressing method Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 201000011066 hemangioma Diseases 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910001000 nickel titanium Inorganic materials 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 208000019553 vascular disease Diseases 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/525—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length for wire, for rods
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/10—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of nickel or cobalt or alloys based thereon
Abstract
The invention relates to an aortic stent ring shaping die which consists of an annular female die with pressing plates at end surfaces sleeved with each other and a cylindrical male die with the pressing plates at the outer peripheral surfaces, wherein a guide pin is arranged in the annular cavity of the female die along the radial direction. The outer peripheral side surface of the male die is provided with a guide groove along the axial direction of the male die. The guide slot cooperates with a guide pin on the master die such that relative movement between the guide slot and the master die is limited to axial translation. A limiting block is arranged in the guide groove near one third of the head end, and limits the limit position of the male die relative to the female die in axial translation. Compared with the prior art, the invention has simple structure and can be used for realizing the shaping of the aortic stent ring.
Description
Technical Field
The invention belongs to the technical field of medical appliances, and particularly relates to an aortic stent ring shaping die.
Background
Aortic vascular diseases, particularly vascular dissection and hemangiomas, are diseases that seriously jeopardize the life safety of patients. The treatment of aortic aneurysms is widely applied by endoluminal repair (Endovascularaortic Aneurysm Repair, EVAR). EVAR implants the tectorial stent into the aortic aneurysm cavity through the delivery system, rebuilds new blood flow channel to reach the treatment purpose, have characteristics such as wicresoft, security height, mortality rate are low, morbidity is low. Clinically, most of the stent graft used for treating aortic diseases belongs to Z-shaped stents. The manufacturing process mainly adopts high-elastic nickel-titanium alloy wires to weave the bracket ring and sews or coats the high polymer film on the bracket ring. The braiding and shaping of the bracket ring need to use a special die and heat treatment. Therefore, whether the design of the support ring is optimized or not directly influences the shaping quality of the support ring and the difficulty of demolding.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the aortic stent ring shaping die which is simple in structure and convenient to demold.
The aim of the invention can be achieved by the following technical scheme:
the aortic stent ring shaping mold consists of an annular female mold with press plates at the end surfaces sleeved with each other and a cylindrical male mold with press plates at the outer peripheral surface.
The annular female mold comprises an annular structure and pressing plates distributed on the end face of the annular structure. The pressing plates are radially distributed along the radial direction of the annular structure.
The upper end of one side of the annular female die upper pressing plate, which is close to the axis of the annular structure, is provided with a section of limiting table for shaping the support ring, the limiting table is perpendicular to the axis direction of the annular structure, the round angle is rounded, and the length of the limiting table is equal to the diameter of the support wire. The distance between the limiting table and the end face of the annular structure which is closer is at least 30mm.
The annular female die upper pressing plate starts from one side far away from the axis of the annular structure and linearly inclines upwards along an angle of 45 degrees until the limiting table meets the limiting table.
One side of the upper pressing plate of the annular female die, which is close to the axis of the annular structure, is provided with a cylindrical surface which is the same as the inner cylindrical surface of the annular structure.
The inner cylindrical surface of the annular female die annular structure is radially provided with a guide pin.
The pressing plates can be uniformly distributed or non-uniformly distributed along the circumferential direction according to requirements, the number of the pressing plates can be adjusted according to requirements, and limit tables on different pressing plates can be distributed on the same plane or different planes.
The cylindrical male die comprises a cylindrical structure and pressing plates distributed on the outer cylindrical surface of the cylindrical structure. The pressing plates are radially distributed along the radial direction of the cylindrical structure.
The cylindrical structure is a hollow cylinder, and the head end of the cylindrical structure is provided with a conical structure. The diameter of the outer cylindrical surface of the cylindrical structure is equal to that of the inner cylindrical surface of the annular structure of the annular mesh die.
The upper end of one side of the cylindrical male die upper pressing plate, which is close to the axis of the cylinder, is provided with a section of limiting table for shaping the support ring, the limiting table is perpendicular to the axis direction of the cylinder, the round angle is rounded, and the length of the limiting table is equal to the diameter of the support wire. The minimum height of the cylindrical male die upper pressing plate along the axis direction of the cylinder is at least 30mm.
The cylindrical male die upper pressing plate starts from one side far away from the axis of the cylinder and linearly tilts downwards along an angle of 45 degrees until reaching and meeting with the limiting table.
The outer circumferential side of the cylinder male die is provided with a guide through groove along the axial direction of the cylinder. The width and depth of the guide through groove are equal to the diameter and length of the guide pin on the annular female die. The guide through groove is matched with a guide pin on the annular female die, so that the relative movement between the male die and the female die is limited to axial translation.
A limiting block is arranged in the guide through groove on the outer peripheral side surface of the cylindrical male die cylinder and near one third of the head end of the guide through groove, and limiting positions of axial translation of the male die relative to the female die are limited.
The pressing plates can be uniformly distributed or non-uniformly distributed along the circumferential direction according to requirements, the number of the pressing plates can be adjusted according to requirements, and limit tables on different pressing plates can be distributed on the same plane or different planes.
Compared with the prior art, the male die and the female die are axially opposite to each other in the pressing process of the support ring, and the shape of the support ring is definitively limited by the male die, the limiting table of the upper pressing plate of the female die and the outer cylindrical surface of the male die, so that the shaping quality can be ensured. After the female die is pulled out from the male die, the shaped support ring only contacts with the limiting table on the male die pressing plate and the outer cylindrical surface of the cylindrical structure, no demoulding obstacle exists, and the support ring can be pulled out along the axial direction of the outer cylindrical surface of the cylindrical structure of the male die, so that the demoulding is easy.
Drawings
FIG. 1 is a schematic view of a ring-shaped master mold according to the present invention.
FIG. 2 is a schematic view of a cylindrical male mold according to the present invention.
FIG. 3 is a schematic view showing the fit of the annular female die and the cylindrical male die before the support ring is pressed and shaped.
FIG. 4 is a schematic view showing the cooperation of the annular female mold and the cylindrical male mold after the support ring is pressed and shaped.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present invention.
Examples
The aortic stent ring shaping die comprises an annular female die 1 with a pressing plate at the end face and a cylindrical male die 2 with the pressing plate at the outer peripheral surface. The annular master mold 1 shown in FIG. 1 includes an annular structure 11 and pressure plates distributed over its end faces 15. The pressure plates are radially distributed along the radial direction of the annular structure 11. The lower end 13 of one side of the upper pressing plate of the annular female die 1, which is close to the axis of the annular structure 1, is provided with a section of limiting table 14 for shaping the support ring, the limiting table 14 is perpendicular to the axis direction of the annular structure 11, the round angle is formed, and the length is equal to the diameter of the support wire. The distance between the limiting table 14 and the end face 15 of the annular structure which is closer to the limiting table is at least 30mm. The upper platen of the annular master mold 1 is inclined upward from the side away from the axis of the annular structure 11 along a 45-degree line until reaching and meeting the stopper 14. The side of the upper pressing plate of the annular female die, which is close to the axis of the annular structure 11, is provided with a cylindrical surface 16, and the cylindrical surface 16 and an inner cylindrical surface 17 of the annular structure belong to the same cylindrical surface. A guide pin 18 is provided radially on the inner cylindrical surface 17 of the annular female die annular structure 11. The cylindrical male die 2 shown in fig. 2 includes a cylindrical structure 21 and pressing plates distributed on the outer cylindrical surface thereof. The platens are radially distributed along the radial direction of the cylindrical structure 21. The cylindrical structure 21 is a hollow cylinder, the head end of which is provided with a conical structure 23. The diameter of the cylindrical surface 24 of the cylindrical structure 21 is equal to the diameter of the inner cylindrical surface 17 of the annular female die annular structure 11. The upper end 24 of one side of the upper pressing plate of the cylindrical male die 2, which is close to the axis of the cylinder, is provided with a section of limiting table 25 for shaping the support ring, the limiting table 25 is perpendicular to the axis direction of the cylinder, the round angle is formed, and the length of the round angle is equal to the diameter of the support wire. The minimum height of the upper pressing plate of the cylindrical male die 2 along the axis direction of the cylinder is at least 30mm. The upper platen of the cylindrical male die 2 is inclined downward from the side away from the cylinder axis in a straight line at an angle of 45 degrees until the stopper 25 meets it. The cylindrical surface 24 of the cylindrical male die 2 is provided with a guide through groove 26 along the axial direction thereof. The width and depth of the guide through groove 26 are equal to the diameter and length of the guide pin 18 on the annular master model 1. The guide through groove 26 cooperates with the guide pin 18 on the annular female die 1 to limit the relative movement between the cylindrical male die 2 and the annular female die 1 to only axial translation. A limiting block 27 is arranged in the guide through groove 26 of the cylindrical surface 24 of the cylindrical male die 2 near the approximately third position of the head end of the guide through groove, and limiting the limiting position of the axial translation of the cylindrical male die 2 relative to the annular female die 1 is achieved. The pressing plates on the annular female die 1 and the cylindrical male die 2 can be uniformly distributed or non-uniformly distributed along the circumferential direction according to the requirement, the number of the pressing plates can be adjusted according to the requirement, and the limiting tables on different pressing plates can be distributed on the same plane or different planes.
The aortic stent ring shaping die can be used for shaping the stent ring by the following steps:
the first step, the bracket wires are connected end to end in a capillary tube mode to form a closed circular plane bracket wire ring.
Secondly, as shown in fig. 3, vertically placing the cylindrical male mold 2; sleeving the planar support wire ring on a 45-degree inclined plane of a pressing plate of the planar support wire ring; the pressing plate on the annular female die 1 is vertically downward, the guide pin 18 is aligned with the guide through groove 26 angle of the cylindrical male die, and the annular female die 1 is pressed down to move opposite to the cylindrical male die 2 until the pressing plate contacts the circular plane bracket wire ring.
Third, as shown in fig. 4, the press ring-shaped female die 1 is continuously pressed down, the circular plane bracket wire ring is forced to deform until the limiting block 27 contacts the guide pin 18, and at this time, the bracket wire is just and simultaneously lapped on the limiting table 14 of the annular female die 1 and the limiting table 25 of the cylindrical male die 2, and is attached to the cylindrical surface 24 of the cylindrical structure 21 of the cylindrical male die 2.
Fourthly, the relative positions of the cylindrical male die 2, the bracket ring and the annular female die 1 are kept unchanged, and the cylindrical male die, the bracket ring and the annular female die are put into heat treatment equipment for mechanical heat treatment.
And fifthly, after the heat treatment is finished, keeping the relative positions of the cylindrical male die 2, the bracket ring and the annular female die 1 unchanged, taking out the cylindrical male die 2, the bracket ring and the annular female die 1, and cooling the cylindrical male die, the bracket ring and the annular female die to room temperature by adopting water quenching and other modes.
Sixth, the annular female die 1 is pulled out of the cylindrical male die 2, and the bracket ring is taken down along the axial direction of the cylindrical male die 2.
The foregoing describes specific embodiments of the present invention. It is to be understood that the invention is not limited to the particular embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the claims without affecting the spirit of the invention.
Claims (7)
1. The aortic stent ring shaping die is characterized by comprising an annular female die with pressing plates at end surfaces sleeved with each other and a cylindrical male die with the pressing plates at the outer peripheral surfaces;
the annular female die comprises an annular structure and pressing plates distributed on the end face of the annular structure, a section of limiting table is arranged at the upper end of one side, close to the axis of the annular structure, of the pressing plates on the annular female die, the limiting table is perpendicular to the axis direction of the annular structure, the length of the limiting table is equal to the diameter of a support wire, and the pressing plates on the annular female die start to incline upwards along an angle of 45 degrees from one side, far away from the axis of the annular structure, until the limiting table meets the limiting table;
the cylindrical male die comprises a cylindrical structure and pressing plates distributed on the outer cylindrical surface of the cylindrical structure, a section of limiting table is arranged at the upper end of one side of the pressing plates on the cylindrical male die, which is close to the cylindrical axis, and is used for shaping a support ring, the limiting table is perpendicular to the cylindrical axis direction, the length of the limiting table is equal to the diameter of a support wire, and the pressing plates on the cylindrical male die start from one side far away from the cylindrical axis, are inclined downwards along a 45-degree angle straight line until the limiting table meets the limiting table;
the inner cylindrical surface of the annular structure is radially provided with a guide pin, the outer circumferential side surface of the cylinder of the cylindrical male die is axially provided with a guide through groove, the width and depth of the guide through groove are equal to the diameter and length of the guide pin on the annular female die, the guide through groove is matched with the guide pin on the annular female die, so that the relative movement between the male die and the female die is limited to axial translation, and a limit block is arranged in the guide through groove of the outer circumferential side surface of the cylinder of the cylindrical male die, close to one third of the head end of the guide through groove, and limits the limit position of the axial translation of the male die relative to the female die;
the stent ring is shaped by the following steps:
the first step, connecting the support wires end to form a closed plane support wire ring;
secondly, vertically placing a cylindrical male die; sleeving a planar support wire ring on a 45-degree inclined plane of a pressing plate on a cylindrical male die; the pressing plate on the annular female die is vertically downward, the guide pin is aligned with the guide through groove of the cylindrical male die, the annular female die is pressed down, and the annular female die and the cylindrical male die move in opposite directions until the pressing plate on the annular female die contacts with the planar bracket wire ring;
thirdly, continuing to lower the annular female die, forcing the planar support wire ring to deform until the limiting block contacts the guide pin, and simultaneously, placing the support wire on the limiting table of the annular female die and the limiting table of the cylindrical male die and attaching the support wire on the cylindrical surface of the cylindrical structure of the cylindrical male die;
fourthly, keeping the relative positions of the cylindrical male die, the bracket ring and the annular female die unchanged, and putting the cylindrical male die, the bracket ring and the annular female die into heat treatment equipment for mechanical heat treatment;
fifthly, after the heat treatment is finished, keeping the relative positions of the cylindrical male die, the bracket ring and the annular female die unchanged, taking out the cylindrical male die, the bracket ring and the annular female die, and cooling the cylindrical male die, the bracket ring and the annular female die to room temperature in a water quenching mode;
and sixthly, the annular female die is pulled out of the cylindrical male die, and the bracket ring is taken down along the axial direction of the cylindrical male die.
2. The aortic stent ring shaping mold as claimed in claim 1, wherein on the annular master mold: the pressing plates are radially distributed along the radial direction of the annular structure.
3. The aortic stent ring shaping mold as claimed in claim 2, wherein on the annular master mold: the pressing plates can be uniformly distributed or unevenly distributed along the circumferential direction, the number of the pressing plates can be adjusted according to requirements, and the limiting tables on different pressing plates can be distributed on the same plane or different planes.
4. The aortic stent ring shaping mold as claimed in claim 2, wherein on the annular master mold: one side of the pressing plate, which is close to the axis of the annular structure, is provided with a cylindrical surface which is the same as the inner cylindrical surface of the annular structure.
5. The aortic stent ring shaping mold as claimed in claim 1, wherein on the cylindrical male mold: the pressing plates are radially distributed along the radial direction of the cylindrical structure.
6. The aortic stent ring shaping mold as claimed in claim 5, wherein the cylindrical structure is a hollow cylinder, the head end of which is provided with a conical structure, and the diameter of the outer cylindrical surface of the cylindrical structure is equal to the diameter of the inner cylindrical surface of the annular structure of the annular female mold.
7. The aortic stent ring shaping mold as claimed in claim 5, wherein on the cylindrical male mold: the pressing plates can be uniformly distributed or unevenly distributed along the circumferential direction, the number of the pressing plates can be adjusted according to requirements, and the limiting tables on different pressing plates can be distributed on the same plane or different planes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810688046.5A CN108624747B (en) | 2018-06-28 | 2018-06-28 | Aortic stent ring shaping die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810688046.5A CN108624747B (en) | 2018-06-28 | 2018-06-28 | Aortic stent ring shaping die |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108624747A CN108624747A (en) | 2018-10-09 |
| CN108624747B true CN108624747B (en) | 2024-03-26 |
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ID=63688572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810688046.5A Active CN108624747B (en) | 2018-06-28 | 2018-06-28 | Aortic stent ring shaping die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108624747B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106466694A (en) * | 2016-08-30 | 2017-03-01 | 有研医疗器械（北京）有限公司 | A kind of shaper of memory alloy stent ring and processing method for shaping |
| CN107126299A (en) * | 2017-06-08 | 2017-09-05 | 有研医疗器械（北京）有限公司 | A kind of high submissive type thoracic aorta covered bracket and its shaper and method |
| CN208701148U (en) * | 2018-06-28 | 2019-04-05 | 上海理工大学 | A kind of aortic stents ring shaping mould |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014182691A2 (en) * | 2013-05-06 | 2014-11-13 | Fort Wayne Metals Research Products Corp. | Titanium-niobium-hafnium alloy shape memory wire |
-
2018
- 2018-06-28 CN CN201810688046.5A patent/CN108624747B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106466694A (en) * | 2016-08-30 | 2017-03-01 | 有研医疗器械（北京）有限公司 | A kind of shaper of memory alloy stent ring and processing method for shaping |
| CN107126299A (en) * | 2017-06-08 | 2017-09-05 | 有研医疗器械（北京）有限公司 | A kind of high submissive type thoracic aorta covered bracket and its shaper and method |
| CN208701148U (en) * | 2018-06-28 | 2019-04-05 | 上海理工大学 | A kind of aortic stents ring shaping mould |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108624747A (en) | 2018-10-09 |
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