CN117983682A - Manufacturing method of medical metal tube and valve bracket - Google Patents
Manufacturing method of medical metal tube and valve bracket Download PDFInfo
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- CN117983682A CN117983682A CN202211350711.2A CN202211350711A CN117983682A CN 117983682 A CN117983682 A CN 117983682A CN 202211350711 A CN202211350711 A CN 202211350711A CN 117983682 A CN117983682 A CN 117983682A
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 98
- 239000002184 metal Substances 0.000 title claims abstract description 98
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 claims description 35
- 238000010438 heat treatment Methods 0.000 claims description 17
- 238000004321 preservation Methods 0.000 claims description 15
- 238000005520 cutting process Methods 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 12
- 238000010892 electric spark Methods 0.000 claims description 12
- 238000000227 grinding Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 7
- 238000005498 polishing Methods 0.000 claims description 6
- 230000009467 reduction Effects 0.000 claims description 6
- 239000011261 inert gas Substances 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000003723 Smelting Methods 0.000 claims description 2
- 239000000243 solution Substances 0.000 description 27
- 238000010622 cold drawing Methods 0.000 description 18
- 239000000463 material Substances 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 238000000137 annealing Methods 0.000 description 5
- 230000003746 surface roughness Effects 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 238000009760 electrical discharge machining Methods 0.000 description 3
- 238000009750 centrifugal casting Methods 0.000 description 2
- 238000005097 cold rolling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 210000003709 heart valve Anatomy 0.000 description 2
- 238000001192 hot extrusion Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 239000012567 medical material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 229910000601 superalloy Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention provides a manufacturing method of a medical metal tube and a valve bracket, wherein the manufacturing method of the medical metal tube comprises the following steps: preparing a tube blank by using a medical metal bar with the diameter of 30-45 mm; and drawing the tube blank for multiple times by using a drawing machine until a finished tube with a target specification is formed, wherein the tube blank is subjected to solution treatment before each drawing. Thus, the obtained medical metal tube has the characteristics of high-precision wall thickness, high smoothness and large-diameter thin wall, and when the medical metal tube is used for manufacturing a valve stent, the manufactured valve stent simultaneously meets the quality requirements of the thin wall and high strength.
Description
Technical Field
The invention relates to the technical field of medical metal tube processing, in particular to a manufacturing method of a medical metal tube and a valve bracket.
Background
The medical metal tube used as the heart valve stent has the characteristics of high strength and the like, so that the traditional processing method such as hot extrusion, centrifugal casting, powder sintering and the like cannot prepare the large-specification thin-wall medical metal tube meeting the quality requirements.
Disclosure of Invention
The invention aims to provide a manufacturing method of a medical metal tube and a valve bracket, which are used for solving the problem that the medical metal tube prepared by adopting the traditional processing method cannot meet the quality requirements of thin wall and high strength at the same time.
In order to solve the technical problems, the invention provides a manufacturing method of a medical metal pipe, which comprises the following steps:
Preparing a tube blank by using a medical metal bar with the diameter of 30-45 mm; and
And drawing the tube blank for multiple times by using a drawing machine until a medical finished tube with a target specification is formed, wherein the tube blank is subjected to solution treatment before each drawing.
Optionally, in the method for manufacturing a medical metal tube, the medical metal bar is an MP35N bar.
Optionally, in the method for manufacturing a medical metal tube, the MP35N rod is a forged rod by double vacuum smelting.
Optionally, in the method for manufacturing a medical metal tube, the solution treatment comprises heating, heat preservation and cooling steps, wherein the heating rate of the heating step is 30-40 ℃/min, the final heating temperature is 1050-1150 ℃, the heat preservation temperature of the heat preservation step is 1050-1150 ℃, the heat preservation time is 10-50 min, and the cooling rate of the cooling step is more than 600 ℃/min.
Optionally, in the method for manufacturing a medical metal tube, the heating and heat preservation process of the solution treatment is performed in an inert gas atmosphere.
Optionally, in the method for manufacturing a medical metal pipe, when the pipe blank is drawn for multiple times by using a drawing machine, the drawing elongation coefficient of the last drawing is 1.3-1.6 relative to the previous drawing, the external diameter reduction rate is 5% -10%, the wall thickness reduction rate is 20% -35%, and the drawing speed is 3HZ.
Optionally, in the method for manufacturing a medical metal tube, the method for manufacturing a tube blank by using a medical metal bar comprises the following steps:
Performing electric spark perforation on the medical metal bar so as to enable the medical metal bar to form a through hole penetrating along the axial direction, wherein the diameter of the through hole is 3-5 mm; and
And cutting the perforated metal bar by using a linear cutting device to form a tube blank with a target specification.
Optionally, in the method for manufacturing a medical metal tube, before performing spark-erosion perforation on the medical metal bar, the method for manufacturing a tube blank by using the medical metal bar further includes:
And grinding the outer surface of the medical metal bar so as to reduce the diameter of the medical metal bar to a target diameter.
Optionally, in the method for manufacturing a medical metal tube, the method for manufacturing a medical metal tube further includes:
And straightening the formed finished pipe and polishing the inner surface and the outer surface of the finished pipe.
The invention also provides a valve stent, characterized in that it comprises: the medical metal pipe manufactured by the manufacturing method of the medical metal pipe according to any one of the above steps.
In summary, the manufacturing method of the medical metal pipe provided by the invention comprises the following steps: preparing a tube blank by using a medical metal bar; and drawing the tube blank for multiple times by using a drawing machine until a finished tube with a target specification is formed, wherein the tube blank is subjected to solution treatment before each drawing. Thus, the obtained medical metal tube has the characteristics of high-precision wall thickness, high smoothness and large-diameter thin wall, and when the medical metal tube is used for manufacturing a valve stent, the manufactured valve stent simultaneously meets the quality requirements of the thin wall and high strength.
Drawings
Fig. 1 is a step diagram of a method for manufacturing a medical metal tube according to an embodiment of the present invention;
fig. 2 is a diagram of the substeps of step S12 in the embodiment of the invention.
Detailed Description
The method for manufacturing the medical metal tube and the valve stent provided by the invention are further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the invention. Furthermore, the structures shown in the drawings are often part of actual structures. In particular, the drawings are shown with different emphasis instead being placed upon illustrating the various embodiments.
As shown in fig. 1, an embodiment of the present invention provides a method for manufacturing a medical metal tube, including the following steps:
S11, preparing a tube blank by using a medical metal bar, wherein the diameter of the medical metal bar is 30-45 mm;
And S12, drawing the tube blank for multiple times by using a drawing machine until a finished tube with a target specification is formed, wherein the tube blank is subjected to solution treatment before each drawing.
According to the manufacturing method of the medical metal tube provided by the embodiment of the invention, the cold drawing machine is used for drawing, and the tube blank is subjected to solution treatment before each drawing, so that compared with the traditional high-temperature alloy hot rolling or cold rolling processing mode (large wall thickness deviation), the seamless tube with high wall thickness uniformity is obtained, the manufacturing method has the characteristics of high smoothness and large-diameter thin wall, and the manufactured valve support meets the quality requirements of the thin wall and high strength.
The above steps are described in further detail below.
In step S11, preferably, the medical metal bar is an MP35N bar. MP35N belongs to Co-Ni-Cr-Mo superalloy material, is a novel high-performance medical material, has the advantages of high strength, good biocompatibility and corrosion resistance, and has outstanding advantages as heart valve stent material. Further preferably, the MP35N bar is a forged bar smelted by double vacuum, and the material purity is high.
Preferably, as shown in fig. 2, the step S11 specifically includes the following steps:
S111, performing electric spark perforation on the medical metal bar so as to enable the medical metal bar to form a through hole penetrating along the axial direction; in one embodiment, the copper core rod electrode with a specified diameter is adopted to perform electric spark perforation on the medical metal bar, perforation can be performed from two ends respectively, one section is perforated in one direction, the rest section is perforated in the opposite direction, so that a through hole can be formed along the axial direction of the medical metal bar, the through hole plays a role of a guide hole, preparation is performed for next wire cutting perforation, and in the wire cutting perforation process.
And S112, performing wire cutting on the perforated medical metal bar by using a wire cutting device to form a tube blank with a target specification. In the wire cutting process, the wire-cut molybdenum wire passes through the through-hole formed in step S111. The wall thickness of the tube blank is controlled by the wire cutting through hole, and the outer diameter is kept unchanged. For example, a medical metal rod with a diameter of 33mm is subjected to spark-erosion, and the diameter of the through hole is 3mm, that is, the pipe formed by spark-erosion has a specification of 33mm (outer diameter) x15mm (wall thickness) x3mm (inner diameter), and then the original inner hole of 3mm is further enlarged by wire cutting, and the inner hole of 3mm is 15mm, so that a pipe blank with a specification of 33 (outer diameter) x3 (wall thickness) x3mm (inner diameter) is formed.
Only when the wall thickness of the tube blank is uniform, the inner surface and the outer surface are smooth, and the quality requirement of the final product can be met. For processing of micropores and deep holes and processing of holes in superhard materials, the problem of difficult solution in the processing technology is always solved, and the product size in the field of medical equipment is very small, so that the hole punching on a metal rod is a technical problem. The tube blank prepared by the hot extrusion method is usually accompanied with oxidation and decarburization, the wall thickness of the tube blank is +/-10%, and the roughness of the inner surface and the outer surface of the tube blank can meet the requirement by grinding the inner surface and the outer surface; the tube blank prepared by the centrifugal casting method has large deviation of the inner diameter, instability and large roughness of the inner hole, and is easy to produce quality defects such as inclusions, air holes and the like; the air holes of the tube blank product manufactured by the powder sintering method are unavoidable, and the mechanical property of the product is lower than that of the tube blank manufactured by forging bar raw materials. According to the tube blank manufacturing method (electric spark perforation and linear cutting) provided by the embodiment, the hollow tubular electrode is used for electric spark perforation, the high-pressure high-speed flowing working fluid is introduced, the electrode axially moves at high speed under the action of the servo system and simultaneously rotates at uniform speed, and the generated electric erosion is discharged by the high-speed working fluid, so that the formed through hole has small diameter, the tube blank manufacturing precision is high, and the wall thickness deviation can be controlled within +/-5%.
In addition, the following steps are preferably performed before step S111:
And S110, grinding the outer surface of the medical metal bar so as to reduce the diameter of the medical metal bar to a target diameter.
The outer surface of the medical metal bar is subjected to grinding treatment in the step S110, so that the diameter of the medical metal bar can be reduced to reduce the number of subsequent blank drawing, and the surface finish of the medical metal bar can be improved.
When the outer surface of the medical metal bar is subjected to grinding treatment, rough machining or semi-finishing can be performed first, and then finishing treatment is performed. Specifically, the medical metal bar can be firstly placed on a horizontal lathe for processing, the outer diameter of the medical metal bar is initially reduced, then the medical metal bar is processed on a cylindrical grinder, and the outer diameter of the medical metal bar is reduced again.
In step S12, the solution treatment includes heating, heat-preserving and cooling steps, and preferably, the heating step and the heat-preserving step are performed in an inert gas atmosphere to maintain the pure cleanliness of the material. The inert gas may be, for example, hydrogen, or other inert gases. The heating rate of the heating step can be 30-40 ℃/min. The heating step and the heat-retaining step may be sequentially performed in an annealing furnace, and after the heat-retaining step is completed, the tube blank may be taken out from the annealing furnace and then cooled with a cooling liquid (e.g., water) to complete the cooling step. In addition, after the heat preservation step is finished, the cooling rate of the annealing furnace can be 30-50 ℃/min.
When the medical metal bar adopts an MP35N bar, the technological parameters of the solution treatment comprise: the final heating temperature of the heating step is 1050-1150 ℃, the heat preservation temperature of the heat preservation step is 1050-1150 ℃, the heat preservation time is 10-50 min, and the cooling rate of the cooling step is more than 600 ℃/min. In one embodiment, the tube blank is heated in the annealing furnace, and after the temperature of the annealing furnace reaches 1050-1150 ℃, the heat preservation time is 10-50 min, and then the tube blank is rapidly cooled by adopting the cooling rate of 600 ℃/min so as to ensure the bright solid solution effect. By the solution treatment, the work hardening stress can be eliminated, the plastic deformation capacity of the subsequent drawing is improved, and the grain size of the product is controlled.
In addition, preferably, when the tube blank is drawn a plurality of times by a drawing machine, the drawing elongation coefficient of the last drawing is 1.3 to 1.6, the outer diameter reduction is 5 to 10%, the wall thickness reduction is 20 to 35%, and the drawing speed is 3HZ. Under the technological parameters, smooth drawing can be ensured, and the pipe meeting the requirements can be obtained. The drawing machine is preferably a hydraulic cold drawing machine, and in other embodiments a chain drawing machine or the like may be used.
In addition, optionally, the method for manufacturing a medical metal tube provided in this embodiment further includes step S13: and (3) straightening and/or polishing the inner and outer surfaces of the finished pipe, wherein the finish of the inner and outer surfaces is further improved through polishing, and the finish of the inner and outer surfaces can be controlled below 0.2 microns.
The medical metal pipe obtained by the manufacturing method of the medical metal pipe provided by the embodiment of the invention has the tensile strength of more than 800Mpa, the yield strength of more than 350Mpa, the elongation of more than 35%, the grain size of more than 6 grades, the roughness of the outer surface of less than 0.2um, the roughness of the inner surface of less than 0.2um, the ellipticity of less than 0.1mm and the wall thickness tolerance of +/-0.015 mm.
In the following, the manufacturing process is exemplarily described, and since the MP35N bar is selected as the most preferred embodiment of the present application, in the following examples, the MP35N bar is used as the base material.
[ Example one ]
S11, placing a forged MP35N bar with the diameter phi of 35mm and the length of 500mm on a horizontal lathe for processing to the diameter phi of 34.5mm, and then processing on an outer circle grinding machine to the diameter phi of 34mm; then, the bar with the diameter phi of 34mm is subjected to electric spark perforation by an electric spark perforation device, a copper core bar with the diameter phi of 3mm and the length of 500mm is used for carrying out electric spark perforation, and then, the bar is processed into a tube blank with the diameter phi of 34 and the tube wall thickness of 2mm by a wire cutting device;
Step S12, drawing is carried out in the whole process by utilizing a hydraulic cold drawing machine, the drawing is deformed to a finished product after 5 times of drawing, and the drawing process is as follows:
(1) Before cold drawing, carrying out solution treatment on a pipe with the size phi 34x2mm (the diameter is 34mm and the pipe wall thickness is 2 mm) at 1150 ℃ for 50min; (2) Processing the dimension phi 34x2mm to phi 32x1.4mm by a hydraulic cold drawing machine, and carrying out solution treatment at 1150 ℃ for 50min; (3) Processing the dimension phi 32x1.4mm to phi 30x1.0mm by a hydraulic cold drawing machine, and carrying out solution treatment at 1150 ℃ for 50min; (4) Processing the dimension phi 30x1.0mm to phi 28x0.7mm by a hydraulic cold drawing machine, and carrying out solution treatment at 1150 ℃ for 50min; (5) The dimension phi 28x0.7mm is processed to phi 26x0.5mm by a hydraulic cold drawing machine, and then solution treatment is carried out at 1150 ℃ for 10min.
And S13, straightening the pipe with the size phi 18x0.4mm after solution treatment, and polishing the inner surface and the outer surface to improve the surface smoothness of the pipe.
In addition, the tube blank can be cut according to the requirement before cold drawing so as to adjust the length of the tube blank.
The finished pipe obtained by the exemplary embodiment has tensile strength of 897Mpa, yield strength of 382Mpa, elongation of 45.8%, grain size of 8 grade, outer surface roughness of 0.120um, inner surface roughness of 0.156um, ovality of 0.035mm and wall thickness tolerance of 0.493-0.516 mm.
[ Example two ]
S11, placing a forged MP35N bar with the diameter phi of 35mm and the length of 500mm on a horizontal lathe for processing to the diameter phi of 33.5mm, and then processing on an outer circle grinding machine to the diameter phi of 33mm; then, the bar with the diameter phi of 33mm is subjected to electric spark perforation by an electric spark perforation device, a copper core rod with the diameter phi of 3mm and the length of 500mm is used for carrying out electric spark perforation, and then the bar is processed into a tube blank with the diameter phi of 33 and the tube wall thickness of 3mm by a linear cutting device;
Step S12, drawing is carried out in the whole process by utilizing a hydraulic cold drawing machine, the drawing is deformed to a finished product after 9 times of drawing, and the drawing process is as follows:
(1) Before cold rolling, carrying out solution treatment on a tube blank with the dimension phi 33x3mm at 1050 ℃ for 50min; (2) Processing the dimension phi 33x3mm to phi 30x2.35mm by a hydraulic cold drawing machine, carrying out solution treatment at 1050 ℃, and preserving heat for 50min; (3) Processing the dimension phi 30x2.35mm to phi 28x1.75mm by a hydraulic cold drawing machine, carrying out solution treatment at 1050 ℃, and preserving heat for 50min; (4) Processing the dimension phi 28x1.75mm to phi 26x1.3mm by a hydraulic cold drawing machine, carrying out solution treatment at 1050 ℃, and preserving heat for 50min; (5) Processing the dimension phi 26x1.3mm to phi 24x1.05mm by a hydraulic cold drawing machine, carrying out solution treatment at 1050 ℃, and preserving heat for 50min; (6) Processing the dimension phi 24x1.05mm to phi 22.5x0.80mm by a hydraulic cold drawing machine, carrying out solution treatment at 1050 ℃, and preserving heat for 50min; (7) Processing the dimension phi 22.5x0.80mm to phi 21x0.65mm by a hydraulic cold drawing machine, carrying out solution treatment at 1050 ℃, and preserving heat for 50min; (8) Machining the dimension phi 21.5x0.65mm to phi 19.5x0.5mm by a hydraulic cold drawing machine, carrying out solution treatment at 1050 ℃, and preserving heat for 50min; (9) The dimension phi 19.5x0.5mm is processed to phi 18x0.4mm by a hydraulic cold drawing machine, and then is subjected to solution treatment at 1050 ℃ and heat preservation for 10min.
And S13, straightening the pipe with the size phi 18x0.4mm after solution treatment, and polishing the inner surface and the outer surface to improve the surface smoothness of the pipe.
The finished tubing obtained by this exemplary embodiment had a tensile strength of 873Mpa, a yield strength of 388pa, an elongation of 47.0%, a grain size of 7.5 grade, an outer surface roughness of 0.123um, an inner surface roughness of 0.154um, an ovality of 0.026mm, and a wall thickness tolerance of 0.392 to 0.410mm.
The embodiment of the invention also provides a medical metal pipe, which is manufactured by the manufacturing method of the medical metal pipe provided by the embodiment. The medical metal pipe has the characteristics of high-precision wall thickness, high smoothness, large diameter and thin wall.
The embodiment of the invention also provides a valve stent, which is manufactured by using the medical metal pipe manufactured by the manufacturing method of the medical metal pipe. The medical metal tube has the characteristics of high-precision wall thickness, high smoothness and large-diameter thin wall, so that the quality requirements of the valve support on the thin wall and high strength are met.
In summary, the manufacturing method of the medical metal pipe provided by the embodiment of the invention comprises the following steps: preparing a tube blank by using a medical metal bar; and drawing the tube blank for multiple times by using a drawing machine until a finished tube with a target specification is formed, and carrying out solution treatment on the tube blank before drawing each time. Thus, the obtained medical metal tube has the characteristics of high-precision wall thickness, high smoothness and large-diameter thin wall, and when the medical metal tube is used for manufacturing a valve stent, the manufactured valve stent simultaneously meets the quality requirements of the thin wall and high strength.
The above description is only illustrative of the preferred embodiments of the present invention and is not intended to limit the scope of the present invention, and any alterations and modifications made by those skilled in the art based on the above disclosure shall fall within the scope of the appended claims.
Claims (10)
1. The manufacturing method of the medical metal pipe is characterized by comprising the following steps of:
Preparing a tube blank by using a medical metal bar with the diameter of 30-45 mm; and
And drawing the tube blank for multiple times by using a drawing machine until a medical finished tube with a target specification is formed, wherein the tube blank is subjected to solution treatment before each drawing.
2. The method for manufacturing a medical metal tube according to claim 1, wherein the medical metal bar is an MP35N bar.
3. The method for manufacturing a medical metal tube according to claim 2, wherein the MP35N rod is a forged rod by double vacuum smelting.
4. The method for manufacturing a medical metal tube as claimed in claim 2, wherein the solution treatment comprises heating, heat preservation and cooling steps, the heating rate of the heating step is 30-40 ℃/min, the final heating temperature is 1050-1150 ℃, the heat preservation temperature of the heat preservation step is 1050-1150 ℃, the heat preservation time is 10-50 min, and the cooling rate of the cooling step is more than 600 ℃/min.
5. The method for manufacturing a medical metal tube according to claim 4, wherein the heating and heat-preserving process of the solution treatment is performed in an inert gas atmosphere.
6. The method of producing a medical metal pipe according to claim 1, wherein when the pipe blank is drawn a plurality of times by a drawing machine, a drawing elongation of the last drawing is 1.3 to 1.6, an outside diameter reduction ratio is 5 to 10%, a wall thickness reduction ratio is 20 to 35%, and a drawing speed is 3HZ.
7. The method for manufacturing the medical metal tube according to claim 1, wherein the method for manufacturing the tube blank by using the medical metal bar comprises the following steps:
Performing electric spark perforation on the medical metal bar so as to enable the medical metal bar to form a through hole penetrating along the axial direction, wherein the diameter of the through hole is 3-5 mm; and
And cutting the perforated metal bar by using a linear cutting device to form a tube blank with a target specification.
8. The method for manufacturing a medical metal tube according to claim 7, wherein the method for manufacturing a tube blank from a medical metal bar before performing spark-piercing on the medical metal bar further comprises:
And grinding the outer surface of the medical metal bar so as to reduce the diameter of the medical metal bar to a target diameter.
9. The method for manufacturing a medical metal tube as claimed in claim 1, further comprising:
And straightening the formed finished pipe and polishing the inner surface and the outer surface of the finished pipe.
10. A valve stent, the valve stent comprising: a medical metal pipe manufactured by the manufacturing method of a medical metal pipe according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211350711.2A CN117983682A (en) | 2022-10-31 | 2022-10-31 | Manufacturing method of medical metal tube and valve bracket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211350711.2A CN117983682A (en) | 2022-10-31 | 2022-10-31 | Manufacturing method of medical metal tube and valve bracket |
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| Publication Number | Publication Date |
|---|---|
| CN117983682A true CN117983682A (en) | 2024-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211350711.2A Pending CN117983682A (en) | 2022-10-31 | 2022-10-31 | Manufacturing method of medical metal tube and valve bracket |
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| Country | Link |
|---|---|
| CN (1) | CN117983682A (en) |
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2022
- 2022-10-31 CN CN202211350711.2A patent/CN117983682A/en active Pending
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