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A rolling shear forming method for general metal vascular stent

A technology of vascular stents and metal tubes, which is applied in stents, medical science, prostheses, etc., can solve the problems of high processing cost, low processing efficiency, and high residual stress of vascular stents, and achieve universal molds, low cost, and overcome residual stress. The effect of thermal stress

Active Publication Date: 2021-06-08
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of high processing cost, low processing efficiency and high residual stress of vascular stents in the prior art, the present invention adopts a rolling shear forming method to process thin-walled tubes set on round rod molds into hollow vascular stents with different patterns. A forming method proposed to meet the needs of different patients

Method used

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  • A rolling shear forming method for general metal vascular stent
  • A rolling shear forming method for general metal vascular stent
  • A rolling shear forming method for general metal vascular stent

Examples

Experimental program
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specific Embodiment approach 1

[0034] Specific embodiment one: combine Figure 1-Figure 4 Illustrate, the forming method of a kind of rolling shear forming universal metal vascular stent of the present embodiment is carried out according to the following steps:

[0035] Step 1. Assemble the upper die 2 with a patterned protrusion 7 on the upper and lower fixed, horizontally movable working platform 1;

[0036] Step 2, putting a section of seamless thin-walled metal pipe 5 to be formed on the round bar roller mold 4;

[0037] Step 3, placing the round bar roll die of step 2 on the horizontal fixed working platform 3 with a working groove;

[0038] Step 4. Quickly push the movable working platform 1 to drive the upper mold 2 to move in translation;

[0039] Step 5: Apply a vertical upward force on the horizontally fixed working platform 3, so that a pressing force will be generated between the upper die 2 and the roller die 4 covered with the seamless thin-walled metal pipe 5, and along with the convex patt...

specific Embodiment approach 2

[0046] Specific embodiment two: combine Figure 6 ~ Figure 7 It is explained that the different convex patterns of the flat lower mold 1 of this embodiment are sheared and formed on a thin-walled cylinder, which has little influence on the forming quality and forming effect of the vascular stent.

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Abstract

The present invention relates to a rolling shear forming method for forming a universal metal vascular stent, which relates to a rolling shear forming method for forming a vascular stent to solve the problems of high processing cost, low processing efficiency, and high residual stress of the vascular stent in the prior art. , the main steps of the method are: placing the upper mold with a patterned protrusion on a movable work platform; placing a section of seamless thin-walled metal tube on the round bar roller mold on a horizontal fixed work platform with a working groove In the working platform; when the moving working platform drives the upper mold to move in translation, and at the same time, the horizontally fixed working platform exerts a vertical upward force, so that the upper mold and the round bar roller mold are squeezed, and as the roller mold rotates, the thin-walled tube is forced to partially The material is cut to form a mesh; the mesh stent is cleaned, heat treated, polished, inspected and corrected. The invention has the characteristics of small mold size, simple structure, low cost, easy realization of automation, strong general mold and the like.

Description

technical field [0001] The invention relates to a rolling shear forming method for forming a vascular stent, which is particularly important for manufacturing metal vascular stents. Background technique [0002] Vascular stents can be placed in the diseased segment of the blood vessel to support the stenotic and occluded segment of the blood vessel, reduce the elastic retraction and reshaping of the blood vessel, and maintain the smooth blood flow in the lumen. Some internal stents can also prevent restenosis. Mainly divided into coronary stents, cerebrovascular stents, renal artery stents, aortic stents, etc. [0003] At present, the general-purpose metal vascular stents are processed by laser cutting, etching and other methods. In recent years, people have begun to use 3D printing new technology to form vascular stents. However, the above methods all have high processing costs, low processing efficiency, and residual stress of vascular stents. Insufficiency of high level...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61F2/91A61F2/82
CPCA61F2/91A61F2002/821A61F2240/005
Inventor 徐保锋刘锐胡志清冀世军李洋赵继李昕宸冯增铭
Owner JILIN UNIV