Requirements of laser processing of vascular stent microporous structure

(Click 497 )

Among many new technologies, laser cutting of vascular stent microporous structure has attracted much attention. The process uses high energy density laser beams to precisely cut metal materials and form pore structures with tiny size and complex morphology. Compared to traditional methods, this approach enables a higher degree of customized design and provides better adaptability and biocompatibility. So what are the requirements for laser cutting of vascular stents?

Bracket pipe: Bracket material is generally medical thin-wall metal pipe, the use of seamless pipe to ensure the consistency and coherence of the material. The material can be medical stainless steel, cobalt-chromium alloy or nickel-titanium shape memory alloy. As a third type of medical device, in addition to considering the uniformity of the chemical composition of the material, the stent should also consider its size requirements and shape requirements, such as the diameter of the pipe, wall thickness and each size deviation. Only when the material size is accurate, the medical support laser cutting machine will be accurate and consistent when cutting the support.

Laser processing system: At present, fiber laser and femtosecond laser are commonly used for cutting metal vascular stents. For precision and tiny instruments such as vascular stents, the smaller the slit width, the better, so in order to obtain a higher power density and a finer incision, you can adjust the parameters to reduce the diameter of the condenser spot of the laser cutting machine for medical stent.

Auxiliary gas: Medical support laser cutting machine generally uses oxygen as an auxiliary gas to cut the support. The airflow also provides part of the cutting energy during laser cutting.

The choice of laser cutting speed: cutting speed is another important factor affecting the quality of cutting, cutting speed of medical support laser cutting machine and laser power density, oxygen flow rate and incision width related, when keeping the laser power density unchanged, with the increase of oxygen flow rate, cutting speed increased; But to a certain optimal value, as the oxygen flow rate continues to increase, the cutting speed no longer increases, when the oxygen flow rate exceeds a certain limit, due to the cooling effect, the cutting speed begins to decrease. The oxygen flow rate is constant, the higher the laser power density, the faster the cutting speed. Under certain cutting conditions, there is a reasonable cutting speed range, cutting speed is too high, the incision will have residue, or even impenetrable; If the speed is too low, the material is overburned, the incision width and the heat affected zone are large.

MEN-LUCK specializes in producing all kinds of laser equipment, and has developed medical stent laser cutting machine, medical wave tube laser cutting machine, super fast femtosecond stent laser cutting machine, medical needle laser cutting machine for the medical industry. Support material proofing and batch processing. Help the manufacturing and micro-processing of medical devices, welcome to contact us.