Universal tool clamp for heat setting of metal intravascular stent

Abstract

The invention discloses a universal tool clamp for heat setting of a metal intravascular stent. The universal tool clamp is used for expanding the size of the metal intravascular stent. Comprising a fixed base, a fixed conical supporting block, a supporting rod, a positioning supporting rod supporting frame, a supporting rod supporting frame, a sliding conical supporting block, a supporting rod limiting strip, a sliding base, a pin and a nut. The metal intravascular stent is arranged on the supporting rod in a sleeving mode, the distance between the two conical supporting blocks is changed through movement of the nut in the direction from the guide rod to the fixed conical supporting blocks, then the supporting rod is made to move outwards in the radial direction, expansion of the intravascular stent is achieved, and the size of the stent can be determined through the supporting rod limiting strips. Step-by-step expansion of metal intravascular stents of various sizes can be achieved through the supporting rod limiting strips of different sizes; the non-destructive expansion of the metal intravascular stent can be realized, the composition is reasonable, the operation is convenient, the process is simple, the step-by-step expansion of the metal intravascular stents with various sizes can be realized only by replacing the stay bar limiting strips with different sizes, and the clamp does not need to be frequently disassembled, assembled and replaced.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a universal tooling fixture for heat setting of metal vascular stents. Background technique [0002] One method of processing metal vascular stents is to use a laser to cut a section of small-diameter metal tube to form a stent model, and then use a fixture to gradually expand the stent model, put it into the furnace for heat setting, and then undergo a series of treatments to obtain the required For the stent, in order to prevent the stent from breaking during the expansion process, the amount of expansion should not be too large. It is necessary to gradually expand the stent by controlling the amount of expansion, and undergo repeated heat setting processes to expand the stent with a smaller diameter to a larger diameter. [0003] The traditional expansion heat setting fixture is a tapered mandrel, through which the vascular stent is expanded to the required size; howev...

AI Technical Summary

Problems solved by technology

[0003] The traditional expansion heat setting fixture is a tapered mandrel, through which the vascular stent is expanded to the required size; however, when expanding through the tapered mandrel, since the mandrel moves relative to the vascular stent, and the gap between the two The friction force is large, which can easily cause damage to the vascular stent; in addition, the fixture type in the prior art is fixed, which cannot meet the needs of stents with different diameters

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