Characteristic Study Of Tool Based On Near-dry Deep Hole Processing

Proportion of the hole processing is very large in the mechanical machining, accountingfor about1/4of the entire processing workload, of which deep hole processing emits a largeshare. In particular, it has been used as the weapons manufacturing. In recent years, greenprocess has been become the measuring criteria for good or bad processing. and the near-drymachining of high-pressure air with a lubricating fluid is being concerned more and more,Therefore, study of deep hole tool features based on near-dry becomes particularly important.First of all, the chip separation mechanism and its size, the forming process of C-shapedchip and broken process of the chip are carried out. By approximating the chip at curved barbending model and buckling problem, Mechanical models of C-shaped chip and chip breakingcriterion are established. Effect size of chip-breaker geometric parameters causing chipfracture is founded; Location distribution of the guid pad is determined by disturbed stabilityconcept; Depending on analysis of the geometric parameters with deep hole BTA drill usedfor the wet processing, the geometrical parameters of the tool angle using fuzzycomprehensive evaluation method are optimized, and distribution of each tooth geometryparameter on the three-blade BTA drill and starting position of tool cutting edge inclination isstudied. Secondly, to analyze the geometric parameters of the tool that impact on cuttingforces, heat and temperature field size, and to prepare for drilling simulation analysis,according to the theory of metal cutting and near-dry deep hole tool characteristics duringdrilling, considering the main factors, slightly going to secondary factors, the mathematicalmodels of quasi-dry-deep hole tool cutting force, speed, heat and temperature field areestablished. Furthermore, a system with parametric modeling of deep-hole BTA drilling is setup by utilizing the Solidworks modeling platform and the Visual Basie6.0programminglanguage. Parameterization of the single-cutting-edge and the multiple-cutting-edge BTAdeep hole drilling of which the structure is welded-type or clip-type entity model are respectively achieved, which improves the design efficiency, and lay out a foundation forstandardization, standardization, serialization, intelligent of deep hole drill, and provideconvenient conditions to structure the deep hole BTA drill model for laryngeal optimizationof drill using removal chip and drilling simulation.Finally, the laryngeal of three-blade BTA deep hole drill carry out topology optimizationby which apply the Hyperworks finite element software, and by applying ANSYS the finiteelement software the stress that the tool before and after the optimization is subjected to iscontrasted. Therefor, the space about the laryngeal of three-blade BTA deep hole drill isexpanded. The difficult problem of near-dry deep hole processing is improved. Thesimulation results which are single-edge BTA drilling are verified that is close to theoreticaland experimental data relatively by which apply Deform-3D finite element software.Simulation results which are the optimized single-edge BTA drilling have some comparisonwith that for commercial deep hole BTA tool. The result is that the single-blade and thethree-blade deep hole BTA tool are more suitable for near-dry deep hole processing, beingapplied to actual production for the near-dry deep hole processing is one step closer.