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Machining technology for small deep step hole of high-precision medical apparatus and instrument

A technology of medical equipment and processing technology, which is applied in the field of high-precision processing technology of medical equipment, can solve the problems of high scrap rate, high maintenance cost, expensive tool consumables, low production efficiency, etc., and achieve excellent processing roughness and rough inner wall of the hole low degree of effect

Active Publication Date: 2016-07-20
杭州锐健医疗股份有限公司
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Problems solved by technology

[0004] However, the machine tool used in the above-mentioned small deep step hole processing method is of high value, and the maintenance cost and tool consumables are relatively expensive. It is not suitable for the production cycle of small batches and multiple specifications of medical devices. This processing method usually requires customized deep hole drills to be assisted by external manufacturers. Processing, it is difficult to control product quality and delivery time, the scrap rate is high, and because of the small hole diameter and long step hole distance, the knife is easy to break during processing, the production efficiency is low, the cost is high, and the surface quality is poor. The surface roughness is required to be 1.6 , after boring processing, the surface roughness can only reach about 3.2, which requires subsequent polishing and honing processing, which increases costs and risks

Method used

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  • Machining technology for small deep step hole of high-precision medical apparatus and instrument
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  • Machining technology for small deep step hole of high-precision medical apparatus and instrument

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Embodiment

[0036] combine Figure 1 to Figure 4 As shown, the present embodiment is a medical guide cylinder, which is used as a mounting fixture for surgical tools such as Kirschner wires, drill bits, and reamers. A through hole is set in the middle of the guide cylinder, and the through hole includes the end through hole 1 of the cutting edge part, the middle through hole The hole 2 and the bore part 3, the intermediate through hole 2 and the bore part 3 form steps due to the difference in diameter. The processing of the guide cylinder adopts a kind of high-precision medical device small deep step hole processing technology of the present invention, which comprises the following steps:

[0037] (1) Prepare the product blank and process the blank. The length of the processed blank is 160mm and the diameter is 30mm. The designed length after the end face is 158mm, and the maximum outer diameter after the first outer circle is 28mm. .

[0038] (2) Drill the middle through hole: Clamp th...

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Abstract

The invention relates to a machining technology for a small deep step hole of a high-precision medical apparatus and instrument, and belongs to the technical field of product machining of the medical apparatus and instrument. The technology mainly comprises center through hole drilling, outer circle turning, boring through a grinding head assembly, honing, step milling, electropolishing and the like. The defects that when a traditional boring cutter carries out boring, the boring cutter is likely to be broken, the boring roughness is large, the machining efficiency is low, and the machining cost is high are mainly overcome.

Description

technical field [0001] The invention relates to the technical field of medical device product processing, in particular to a high-precision processing technology for medical devices with small deep stepped holes. Background technique [0002] Orthopedic surgical instruments generally use stainless steel as the main processing raw material for the instrument. Commonly used materials include martensitic precipitation hardening stainless steel 17-4PH, austenitic stainless steel 06Cr19Ni10, and cutting edge processing material 9Cr18Mo. Since the chromium content in stainless steel is greater than 12%, a passivated, dense chromium-rich oxide layer is formed on the surface of the stainless steel in the atmosphere and the surface is further oxidized, so it has better rust resistance than ordinary structural steel. Withstand frequent cleaning and sterilization operations. In orthopedic surgery operations, it is often necessary to drill through holes or tap threads on the bone thro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 胡小军李盛龙朱晓峰周吉波
Owner 杭州锐健医疗股份有限公司
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