The Research And Development Of The New Structure Of Deep Hole Drilling

With the rapid development of high-speed machining technology, high speed drilling(HSD) technology has also received widespread attention. Deep hole drill as a key equipmentof deep hole processing, are rarely results in high speed drilling. In order to meet therequirements of the high-speed cutting processing, a held steady in the high speed drilling, itcan achieve efficient chip removal and efficient cooling of deep hole drilling.Using highspeed cutting technology and fluid knowledge, redesigns of deep hole drill structure andstudies its motion state in high speed drilling.Deep hole machining process, the internal space is very narrow, deep hole drill to ensureenough space for chip removal channel, and to guarantee enough rigidity in the feed. Classicdeep hole drilling in order to solve the problems mentioned above, designed the chip sizeasymmetry channel, deviation from the rotary center. This structure vibration amplitude islarger in the high-speed movement, guide a badly worn. In the limited space, and in order toimprove the chip removal efficiency, reduce the high speed of moment of inertia as thestarting point, redistribute a cutting edge position, change the chip flow Angle, to developnew deep hole drill is suitable for high speed drilling. Here is the paper, three key points:(1) The four cutting edges are symmetric structure. Each cutting edge symmetricalabout the center, forming two pairs in the opposite direction, equal to the size of the couple,pure rotation effect. Ensure that new types of deep hole drilling and static balance anddynamic balance, to achieve smooth high-speed drilling.(2) Innovation design impact flow channel, solve the classic BTA drill against scouring chip form vortex in the throat.By changing the chip flow Angle, narrow throat fan-shapedarea, make the classic BTA drill throat factor value of5.1to reduce the pressure losscoefficient is2.0, is conducive to cutting fluid efficient clearance.(3) New type of deep hole drilling and modal analysis. There are many vibration sourcesin high-speed drilling. Through the simulation software for the natural frequency, modalanalysis of drill avoid vibration frequency source (mainly the high speed drilling machine).This paper expounds the structure of innovative new type of deep hole drill. And in theoptimization of structural strength analysis and chip removal port and modal analysis in threeaspects, the numerical analysis. For the new type of deep hole drill provides a theoretical basisfor structure optimization design.