Ultralow-temperature micro-abrasive air jet machining device for polymer micromachining

Abstract

The invention discloses an ultralow-temperature micro-abrasive air jet machining device for medical polymer material micromachining. The ultralow-temperature micro-abrasive air jet machining device ischaracterized by comprising a liquid nitrogen adjusting system, an air micro-abrasive two-phase flow generating device, a liquid nitrogen micro-abrasive mixing device and a machining system. The liquid nitrogen adjusting system comprises a self-pressurization liquid nitrogen tank (1), a pressure reducing valve (2), a liquid nitrogen flow meter (3) and a first ultralow-temperature heat preservation pipe (4). The air micro-abrasive two-phase flow generating device is composed of an air compressor (12) and a micro-abrasive air two-phase mixer (10). The liquid nitrogen micro-abrasive mixing device (8) is composed of a liquid nitrogen micro-abrasive mixer (18), and the machining system is composed of a four-coordinate moving platform (17) and a micro nozzle (14). According to the ultralow-temperature micro-abrasive air jet machining device for medical polymer material micromachining, brittle domain machining can be carried out on the polymer material, the structure is simple, the automation degree is high, the machining efficiency is high, and green, high-quality, high-efficiency and precise micromachining of the polymer material is realized.

Description

Technical field [0001] The invention belongs to the field of low-temperature engineering and relates to a micro-machining machine tool, particularly an ultra-low-temperature micro-abrasive gas jet processing device for micro-machining of medical polymer materials. Background technique [0002] Initially, thanks to the rapid development of MEMS, microfluidic chips first used hard and brittle materials such as silicon, quartz and glass. However, with the development of science and technology, studies have shown that compared to hard and brittle materials such as silicon, quartz and glass, polymers have the advantages of many types, good biocompatibility, and low raw material prices, and are increasingly becoming the mainstay of microfluidic chips. The most promising material. Among them, polydimethylsiloxane (PDMS) chips are used in certain biological experiments. They can form a sufficiently stable temperature gradient to facilitate the realization of reactions. They are non...

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Problems solved by technology

[0006] The purpose of the present invention is to design an ultra-low temperature micro-abrasive air-jet for micro-machining of medical polymer materials in view of the problems of poor processing stability, abrasive embedding, and difficult control of processing quality in the existing low-temperature abrasive air-jet processing method for medical polymer materials. Processing device

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