Method for online monitoring of diameter change of medical stent

Abstract

The invention relates to a method for monitoring pipe the diameter change of medical stent in online manner, which mainly solves the problems that a measuring tool and the stent are frequently contacted due to the adoption of the contact type measuring in the prior art, thereby causing the damage to a pipe wall, and the pipe diameter of the medical stent is overproof and feeding is continued, thereby causing the blocking of a tool clamp at the rear end. According to the technical scheme adopted by the invention, online monitoring equipment comprises a feed shaft, a non-contact type precise measuring head and a control system, a measuring signal of the non-contact type precise measuring head is input to the control system, the control system controls the feed shaft to feed and is provided with an automatic alarming function, the non-contact type precise measuring head is arranged between a cutting area of stent laser cutting equipment and a clamping area of a stent pipe, when the stent pipe is used for feeding in the cutting process, the non-contact type precise measuring head is used for measuring pipe diameter tolerance of the stent pipe in real time through a measuring head measuring cross section, so that the problems can be well solved, and the method can be used in the manufacturing industry of medical stent pipe measuring equipment.

Description

technical field [0001] The invention relates to a method for on-line monitoring the diameter change of a medical stent. Background technique [0002] With the rapid development of material science and precision micromachining technology, there are more and more types of medical stent materials. The more common ones are stainless steel 316L, nickel-titanium alloy, cobalt-based alloy, pure iron, magnesium alloy and other metal materials, as well as polymers, etc. non-metallic materials. Because the medical stent expands the vascular wall in the blood vessel to prevent vasoconstriction or even cause various diseases, it is required that the characteristic structure and size of the ribs on the stent be consistent in order to maintain the same tension at each point of the whole stent. The bracket processing technology puts forward higher requirements. Generally, medical stents are processed with seamless pipes. Due to the incomplete development of interventional surgery in the ...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is the use of contact measurement of the medical stent pipe, which causes frequent contact between the measuring tool and the stent, resulting in damage to the pipe wall, and the problem of being stuck by the back-end tooling fixture due to the continued feeding of the medical stent due to the out-of-tolerance pipe diameter. The invention provides a new automatic measuring device for the pipe diameter of the medical support pipe, which uses a non-contact measuring head to measure the pipe diameter of the support pipe, so as to avoid damage to the pipe wall caused by the contact measuring tool frequently contacting the support pipe. And due to the out-of-tolerance diameter of the medical stent, it was stuck by the back-end tooling fixture as a result of continuing to feed the material

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