Electrochemical polishing device and polishing method for vascular stent

Abstract

The invention relates to the technical field of polishing, and discloses an electrochemical polishing device and polishing method for a vascular stent. The polishing device comprises a lifting assembly, an anode assembly, an adjusting assembly and a cathode assembly; the lifting assembly comprises a lifting frame and a first driving mechanism; the anode assembly comprises an anode, an elastic piece, a vibration source and a metal wire which are connected in sequence; the metal wire is used for mounting the vascular stent and has a contracted state and an expanded state, wherein in the contacted state, the metal wire is movably connected with the vascular stent, and in the expanded state, the metal can be fixedly connected with the vascular stent; the adjusting assembly comprises a first supporting frame and a second driving mechanism, and the first supporting frame is connected with the metal wire and provided with a vertical position where the metal wire can be in the contracted stateand a horizontal position where the metal wire can be in the expanded state; and the cathode assembly is arranged below the anode assembly and comprises a polishing barrel containing a polishing solution and a cathode arranged in the polishing barrel. The electrochemical polishing device is simple and compact in structure, convenient to operate, uniform in polishing, good in polishing effect andhigh in efficiency.

Description

technical field [0001] The invention belongs to the technical field of polishing, and in particular relates to an electrochemical polishing device and a polishing method applied to CoCr alloy vascular stents. Background technique [0002] Interventional therapy is the main method for treating vascular occlusion diseases, and vascular stents, as a key component of interventional therapy, have gradually become the focus of research. CoCr alloy has good mechanical properties, has the characteristics of small specific gravity, light weight, stable chemical properties and strong corrosion resistance, and it is non-irritating to the body itself, so it can be used as a planting material. Therefore, CoCr alloy has gradually become a new material of choice for vascular stents. [0003] During the production and processing of CoCr alloy vascular stents, it is necessary to laser engrave the tubes, which will generate heat-affected zones and recast layers at the cutting positions on th...

AI Technical Summary

Problems solved by technology

In the existing polishing method, the contact of the vascular stent is uneven, the reaction between the polishing liquid and the slag is not sufficient, and it takes a long time for the reaction to achieve the desired effect, so that the entire polishing process consumes a lot of energy and time, and the polishing effect is not good. not ideal

For example, there is an electrochemical polishing method for a magnesium vascular stent disclosed in Chinese patent CN106435706A. The polishing method mainly solves the problem that mechanical polishing cannot reach the polishing accuracy and consumes a lot of time and manpower; Electrochemical polishing device for stents, the construction of which includes an automatic rotating device to achieve bidirectional polishing of stents

Although the vascular stent polishing method disclosed in the above-mentioned patent has improved the polishing steps in the vascular stent manufacturing process and improved the polishing effect, it has not fundamentally solved the problems of low efficiency and insufficient polishing in the existing vascular stent polishing device and polishing method. Uniformity, complex procedures and low degree of automation

Images