Introduction to medical parts processing, you just have to look at it

u200b 90% of the implanted parts of medical parts and equipment are made of Ti6Al-4V titanium alloy. Due to its light weight, high strength and high biocompatibility, the titanium alloy 6AL-4V has become the most commonly used medical implanted medical parts and equipment. Material, titanium alloy 6AL-4V is usually used in the production of hip joints, bone screws, knee joints, bone plates, dental implants, and spinal connection components.u200b Titanium alloy has the characteristics of work hardening. The cutting angle is large during the machining process, the chips produced are thin, and a relatively small contact area is formed on the tool. In addition, the high cutting force during the machining process, combined with the frictional force during chip flow, will comprehensively lead to excessively high local cutting heat of the tool. The poor thermal conductivity of titanium alloys prevents the cutting heat from being conducted quickly. As a result, a large amount of cutting heat is concentrated on the cutting edge and the tool surface. High cutting force and cutting heat will comprehensively cause crescent craters and cause rapid tool failure. The relatively low modulus of elasticity makes titanium alloys more elastic than steel. Therefore, excessive cutting force should be avoided to ensure that the rebound of the workpiece is small. Thin-walled parts have a tendency to deform under tool pressure, causing chatter, friction and even tolerance problems. The key to solving the problem is to ensure the rigidity of the entire system. It is very necessary to use tools with sharp cutting edges and correct geometric shapes. In addition, titanium alloys have a tendency to chemically react and alloy with cutting tools at high temperatures, and their chips have a tendency to be welded to the surface of the tool. Medical equipment processing equipment needs to be able to process small and complex parts made of difficult-to-process materials (such as titanium alloy or stainless steel) and require high precision. For example, processing bone and joint replacement parts is quite complicated. Due to the poor cutting performance of the material being processed, the blank is usually a bar stock-which means that a large amount of metal needs to be removed. Therefore, part of the parts are cast into a shape close to the finished product, but this also adds to the trouble-the need to manufacture complex and expensive jigs. Another factor that increases processing complexity is the narrow tolerance range. Medical equipment parts and components have high requirements on material, processing accuracy, and surface finish, which requires high reliability of the processing system. As a result, extremely high requirements are placed on machine tools, fixtures, cutting tools, and CAM software. Workpieces are usually processed on advanced medical equipment processing equipment such as Swiss automatic lathes, multi-spindle machine tools and rotary tables. These machine tools are mostly characterized by very small size and very compact structure.