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Metal thin-wall pipe preparation method, metal thin-wall pipe fitting and cardiovascular stent

A technology of metal thin, walled tubes, applied in stents, medical science, prostheses, etc., can solve the problems of large tube wall thickness, inability to meet the standard of cardiovascular stents, low surface finish of the tube wall, etc., and achieve the effect of high smoothness

Inactive Publication Date: 2018-02-09
房文斌
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the wall thickness of the metal pipe fittings prepared by the traditional metal forming method is relatively large, and the surface finish of the pipe wall is relatively low, which makes it unable to meet the standards for the preparation of cardiovascular stents

Method used

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  • Metal thin-wall pipe preparation method, metal thin-wall pipe fitting and cardiovascular stent
  • Metal thin-wall pipe preparation method, metal thin-wall pipe fitting and cardiovascular stent
  • Metal thin-wall pipe preparation method, metal thin-wall pipe fitting and cardiovascular stent

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Experimental program
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Effect test

Embodiment 1

[0031] figure 1 It is a schematic flow chart of the method for preparing a metal thin-walled pipe provided in Embodiment 1 of the present invention. figure 2 It is a structural schematic diagram of a drawing die, a pre-drawing blank and a mold core in the method for preparing a metal thin-walled pipe provided in Embodiment 1 of the present invention.

[0032] At present, the methods of preparing metal thin-walled tubes mainly include drawing forming, extrusion forming and rolling forming, all of which use the characteristics of metal plastic deformation to apply a certain force to the metal blank to deform and reduce the cross-sectional area, and finally form a thin-walled tube. pipe fittings. However, the above-mentioned preparation method is extremely difficult to prepare metal pipes with a wall thickness of less than 0.3mm, and the surface roughness and strength of the finished pipes cannot meet the standards for the use of cardiovascular stents, so they are not suitable ...

Embodiment 2

[0072] image 3 It is a scanning electron microscope diagram of the cross-section of the metal thin-walled pipe provided in Embodiment 2 of the present invention. Refer to attached image 3 As shown, Embodiment 2 of the present invention also provides a metal thin-walled pipe fitting, which is prepared by the above-mentioned metal thin-walled pipe preparation method.

[0073] It should be noted that the metal thin-walled pipe fittings can be extruded metal rods to be drawn, and a blind hole is drilled on the end face of one end to complete the pretreatment. diameter treatment to obtain a preliminary drawn blank with relatively uniform wall thickness, and then insert a mold core in the blind hole of the preliminary drawn blank, and perform at least one cold drawing process on the preliminary drawn blank in the drawing die to obtain Metal thin-walled pipe, the metal thin-walled pipe is only a pre-finished product, after which it needs to remove the mold core, straighten and dr...

Embodiment 3

[0077] The present invention also provides a cardiovascular stent, which is made of the above-mentioned metal thin-walled pipe.

[0078] It should be noted that the cardiovascular stent provided in this embodiment utilizes the metal thin-walled pipe provided in Embodiment 2 to make a cardiovascular stent by laser cutting and processing, wherein the shape and specific dimensions of the cardiovascular stent are based on the Cardiovascular stents are designed to be located in different parts of the human body. In this embodiment, the metal thin-walled tube may be a thin-walled tube of magnesium or magnesium alloy, which has good biocompatibility and can ensure that the cardiovascular stent has minimal side effects on the human body.

[0079] Other technical features are the same as those in Embodiment 1 or Embodiment 2, and can achieve the same technical effect, and will not be repeated here.

[0080] In the cardiovascular stent provided by Embodiment 3 of the present invention, t...

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Abstract

The invention provides a metal thin-wall pipe preparation method, a metal thin-wall pipe fitting and a cardiovascular stent. The metal thin-wall pipe preparation method comprises the following steps:a blind hole is drilled in the end surface of a metal rod to be drawn to obtain a drawn blank; an empty drawing process is adopted to perform the reducing treatment on the drawn blank to obtain a primary-drawn blank; a mold core is inserted in the blind hole of the primary-drawn blank; and the primary-drawn blank is fixed in a drawing mold for at least once of cold drawing treatment to obtain a metal thin-wall pipe. The metal thin-wall pipe fitting is prepared by adopting the metal thin-wall pipe preparation method; and the cardiovascular stent is prepared by adopting the metal thin-wall pipefitting. The prepared metal thin-wall pipe is lower in pipe wall thickness; and the strength of the metal thin-wall pipe fitting and the pipe wall surface smoothness are higher to meet the use requirements of the cardiovascular stent.

Description

technical field [0001] The invention relates to the technical field of metal pipe material preparation, in particular to a method for preparing metal thin-wall pipes, metal thin-wall pipe fittings and cardiovascular stents. Background technique [0002] Cardiovascular stents, also known as coronary artery stents, are medical devices commonly used in cardiac interventional operations, and have the function of dredging arteries. Currently commonly used cardiovascular stents include metal stents, coated stents and degradable stents. These brackets are all formed by overlapping metal pipe fittings, and the metals used mainly include titanium and titanium alloys, or magnesium and magnesium alloys. [0003] The existing preparation methods of metal pipe fittings mainly include drawing forming, extrusion forming and rolling forming. Among them, drawing forming refers to the processing method of forcing metal to pass through a die hole with a certain taper under the action of exte...

Claims

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Application Information

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IPC IPC(8): B23P15/00A61F2/82
CPCA61F2/82A61F2240/001B23P15/00
Inventor 房文斌
Owner 房文斌
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