Multi-axis NC Machining Process Improvement of High Precision U-shaped Thin-wall Aluminum bearing parts

Abstract:The thin-wall part processing characteristies were analyzed. Taking a low-volume high-precision U-shaped thin-wall uminum bearing part as example, special fixture was designed to achieve partial five-axis machining transferring three-axis machining technology, so cost was saved and technical direction was provided for the enterprises to rational use of high-end equipment. A special duction efficieney was improved and serap rate was reduced. The practice is lo improve the five-axis machining technology, sopro-

lool was designed. And shock absorption and vibation measures were provided oved that process improvement measures are practical and efficient in dealing with thin-wall parts processing.

Keywords:Thin-wall aluminum parts:Special tools:Five-axis machining:Process improvement

1 Inner cavity process analysis For small batch processing, the inner cavity processing of the U-shaped part generally uses a five-axis machining center. The biggest advantage of using a five-axis machining center is that because the main shaft of the five-axis machining center can swing, its fixture requirements and manufacturing process are relatively simple; but the U-shaped part has a large cutting allowance and uneven machining allowance, which leads to the cutting process time Long, high-value five-axis machining centers are used to complete the work when the internal cavity accuracy is not high, which will cause a large load on the limited resources and equipment of the enterprise, resulting in increased costs and low efficiency.

On the basis of the same efficiency, by designing suitable fixtures and using a three-axis vertical machining center for processing, this article can effectively solve the problem of enterprise equipment resource shortage, realize the transfer of five-axis processing to three-axis, and enable enterprises to use equipment rationally and improve Overall efficiency.

1.2 Annular sealing process analysis The coaxiality of the annular sealing groove inside the lug with the two holes of 70 and d65mm is d0.02mm, and the surface roughness is Ra3.2μm. It is difficult to process with conventional tools, and it is generally processed by an ordinary horizontal boring machine. The precision of ordinary boring machines is low, and the machining process is not completed at one time. The coaxiality and surface quality required for parts processing cannot be guaranteed, and the scrap rate is high.

By redesigning the tool, and using the vibration absorbing material and the vibration damping device to complete the processing of the annular seal groove on the five-axis DUM8OP machining center last time, the processing accuracy and product quality can be effectively guaranteed.