Thin-walled catheter machining method

Abstract

Disclosed is a thin-wall conduit machining tool. First, according to the geometrical shape of an inner cavity of a thin-wall conduit, a plurality of different specifications of tapered drill bits with 15-degree taper angles and a tapered drill bit with a 90-degree taper angle are manufactured; then, the tapered drill bits are used for roughly machining the inner cavity of the thin-wall conduit, stepped holes are avoided, finishing stock is made to be even, and thus cuttings can be discharged in time conveniently; meanwhile, when the appearance of the thin-wall conduit is machined, a central spindle which is matched with the inner cavity of the thin-wall conduit in geometrical shape is manufactured in advance, after the inner cavity of the thin-wall conduit is completely machined, the central spindle can be positioned through the geometrical shape of the inner cavity of the thin-wall conduit, and accordingly the appearance of the thin-wall conduit can be machined. According to the thin-wall conduit machining tool, the finishing stock for machining the thin-wall conduit is even, a cutter can be evenly stressed, the service life of the cutter can be effectively prolonged, machining time is shortened, the central spindle is designed to be matched with the inner cavity of the thin-wall conduit in geometrical shape, hence, parts can be clamped conveniently, firmly and reliably, the coaxiality of the parts can be guaranteed, and therefore the product percent of pass is improved.

Description

technical field [0001] The invention relates to the technical field of catheter processing, in particular to a machining method for thin-walled catheters. Background technique [0002] At present, there are two ways to process catheters: one is to use explosive forming, and the other is to use mechanical processing to form; the shortcomings of the explosive forming method: 1. The mold used is easy to be damaged or even deformed during the explosion process. 2. The molded product The dimensional accuracy is low and cannot meet the standard, the pass rate is low, and it causes a lot of waste of raw materials; 3. The application range of the explosive forming method is limited, which is restricted by the material of the processed parts; although the use of mechanical processing to overcome the shortcomings of explosive forming, However, the traditional mechanical processing method has the disadvantages of long processing cycle, low work efficiency, large tool loss, and low pass...

AI Technical Summary

Problems solved by technology

[0002] At present, there are two ways to process catheters: one is to use explosive forming, and the other is to use mechanical processing to form; the shortcomings of the explosive forming method: 1. The mold used is easy to be damaged or even deformed during the explosion process. 2. The molded product The dimensional accuracy is low and cannot meet the standard, the pass rate is low, and it causes a lot of waste of raw materials; 3. The application range of the explosive forming method is limited, which is restricted by the material of the processed parts; although the use of mechanical processing to overcome the shortcomings of explosive forming, However, the traditional mechanical processing method has the disadvantages of long processing cycle, low work efficiency, large tool loss, and low pass rate.

Especially for the processing of thin-walled catheters, one end of the inner cavity of the catheter has a tapered deep hole with a cone angle of 15°, and the entire wall thickness of the entire catheter is only 2mm; when processing the inner cavity of thin-walled catheters, different specifications are used The drill bit is used for rough machining, and the formed step hole is not conducive to the next step of finishing machining. At the same time, when machining the shape of the conduit, it is processed by the top method. Due to the uneven wall thickness allowance, the force on the tool is uneven during the machining process, and the parts It is easy to jump, which makes it difficult to ensure the coaxiality between the inner cavity and the outer shape of the catheter, resulting in uneven wall thickness and low pass rate of parts in one-time processing

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