Embedded rapid cooling orthopedic twist drill and manufacturing method

Abstract

The invention discloses an embedded rapid cooling orthopedic twist drill and a manufacturing method. Two cooling water ring grooves are formed in the outer circumferential wall of a connecting sectionof the orthopedic twist drill, a sleeve ring is additionally arranged outside the orthopedic twist drill, and a closed rotating connector capable of rotatably conveying liquid media by 360 degrees isformed among the cooling water ring grooves and the sleeve ring. External cooling liquid is led into an internal circulation spiral cooling water channel in a drill body to cool the drill body, and the drill body and a cutting portion thereof are of split detachable structures. According to the orthopedic twist drill, by the aid of the external conveyed cooling liquid, the internal circulation spiral cooling water channel rapidly cools the bone drill without polluting a wound of a patient. A tool no longer needs to be sharpened by experienced staff after the cutting portion is abraded, and awear-out part is directly replaced. Key components of the orthopedic twist drill adopt selective laser melting, used materials can be same or different metal powder materials, and the orthopedic twistdrill has a certain economic benefit advantage in terms of waste tool recovery and reuse.

Description

technical field [0001] The invention relates to an orthopedic twist drill and processing technology, in particular to an embedded rapid cooling orthopedic twist drill and a manufacturing method. Background technique [0002] Bone drill is a kind of medical device, which is often used in fracture surgery. During the operation, medical personnel need to use a bone drill to make a hole in the patient's bone surface, and finally the operation can be completed. Existing studies have proved that the cutting force and cutting temperature of the bone drill have a significant impact on the drilling effect. Higher cutting speed and feed rate can reduce bone cracks and thermal damage to bone, but there are new challenges to bone drill wear and continuous heat dissipation. Bone is a complex anisotropic, porous and viscoelastic composite material that is very sensitive to the impact of cutting force and cutting effect brought by the wear of the bone drill, so long-term cutting wear is ...

AI Technical Summary

Problems solved by technology

In addition, cortical bone is a relatively poor thermal conductor. It is estimated that in metal cutting drilling, about 80% of the heat is taken away through chip breaking, while only about 60% of the heat can pass through during bone drilling. Bone fragments are dissipated, however, when the temperature rises above 50°C, this may lead to osteonecrosis, so the cooling performance defect of the bone drill is another research direction for the harm caused by the drilling operation to the patient

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