Research On Processing Of Deep Hole Based On Orlented Combination Deep Hole Drill

Chain wheel shaft is the key part of conveyor equipment in coal mine. Its axia l throughoil hole is processed by deep hole drill. Deep hole drilling is carried out in the closedcondition with poor cooling,difficult chip removing,poor rigid ity and etc shortcomingswhich is a majoy problem of machine processing. In order to improve cutting quality, a neworiented combination drill was introduced. In order to enhance the knowledge of new cuttingtool and overcome the situations of cutting tool failure because of over wear and partsscrapped. Geometric parameters, cutting parameters, cutting force and wear scrap of thecutting tool were deeply studied by using the method of mecha nical analysis and cuttingexperiment.Proce Processing of chain wheel shaft was choosed as the object of study. A new type ofHTS oriented combination deep hole drilling tool was adopted to process this part. In thepaper,We studied the geometry angle, materia l, configuration of the cutting tool and made aseires of experiments to find the rule between cutting parameter and the life of drill. Theexperiment results show as follows: The oriented combination drill improve the guide and thecrumbs function from design, so the tool is more applic able to exact processing.The combineddrill is more applicable to the system with the higher coaxia l degrees precision.W hen it cannotmeet the dema nd, the combination drill can be rapid ly transformed into the "gun drill" bygrinding one side blade according to its deflect direction. When the combination drill istransformed, its life was extended.The appropriate tooling parameters are determine d.and reasonable processing technologyimproved methods were proposed by the research which provide reliable basis for exploringdeep hole drilling laws . It is very important significa nce to improve the reliability and stabilityof deep hole drilling, reduce costs and increase economic benefits.