Study Of Deep Hole Drilling For Difficult Processing Materials And Correction Technique

Deep-hole processing is an important branch of mechanical processing. Now iswidely used in aerospace and national defense equipment manufacturing. With thedevelopment of science and technology, there has some difficult problems in thedeep-hole processing ,such as complex structure of deep-hole parts, hard cuttingmaterial deep-hole processing and high-precision deep-hole machining parts, in thispaper, these difficult problems which encountered by deep-hole processing werestudied.Discussed the problem of axis deviation during deep-hole processing. Analyzedthe mechanism of the deep-hole axis deflection, established the mechanical model ofthe processing tool and the differential equations of hole axis deviation, obtained therelationship between the hole axis deviation value and the relevant parameters, onthis basis, a method of additional external force was proposed to correct the axisdeviation. Experimental results show that this method is effective.Discussed the deep-hole technology of difficult-to-cut materials on 316L stainlesssteel and titanium alloy TC4. Firstly analysis the nature of machinability at stainlesssteel 316L and titanium alloy TC4, described the experiment process of 316L stainlesssteel deep-hole processing which optimized cutting parameters, including option oftool material,cutting speed and feed; Secondly analysis the difficulty nature of machinability at TC4 titanium alloy, chose the best tool material by test, and throughorthogonal experiment, focused on analysis the tool geometry angle influence on toolwear, obtained the best tool geometry angle when drilling TC4 titanium alloy.Analysis the difficult of the structure and processing difficulties of the deep-partpart high acceleration shock machine, on this bases, determined the reasonableprocessing, after the relevant experiments selected the best cutting parameters,eventually the deep-hole part of high acceleration shock machine was processed andit was meet the requirements precision, provides a reference for the related deep-holeprocessing.