1 introductive vibration is gotten cutting a course is process of a kind of dynamic cutting. The course is cut in vibration getting in, the change of broach axial vibration and feed makes the horn before its, hind ply of speed of dip of horn, blade, cutting, cutting, cut the parameter such as horn, angle of friction, horn drifting bits to all have dynamic character, produced vibration getting to cut the dynamic axial force with process peculiar place and torque thereby. According to theory of bevel angle cutting, hypothesis general broach advocate on cutting blade and horizontal blade be out of shape the process is handled respectively for a series of tiny oscillatory cutting that have dynamic character unit, undertake mechanical analysis through unit to every dynamic cutting mechanism, can construct the forecast model of the dynamic axial power that gives whole bit and torque. Graph 1 get the 3 section that cut a course to differentiate on the foundation that the article is studying to work before, will get cut a process to differentiate for 3 section, get namely, auger counteract get a section, if pursue,1 is shown. Get section to begin to contact workpiece from horizontal blade advocate till cutting blade just enters work entirely get cut process; to get a section to be the instant that gets a work from horizontal blade to advocate till cutting blade just gets a work entirely auger. The builds whole bit dynamic axial strength of 2 forecast model and torque forecast model are to part to consider broach at the same time in 3 section advocate cutting blade is built with the action of horizontal blade. The section in getting is in the section in getting those who cut a course, when studying dynamic axial force and torque, should consider at the same time advocate the action of cutting blade and horizontal blade, will advocate cutting blade and horizontal blade are in the dynamic axial power that place of the section in getting produces and torque part overlay, the P of dynamic axial force that is generation of place of the section in getting namely and torque M, namely (in 1) (2) type, the axial force that Pl, Pc (Ml, Mc) gives priority to cutting blade and horizontal blade to arise respectively (torque) , the unit axial force that DPlj, DPck(DMlj, DMck) gives priority to cutting blade and horizontal blade to arise respectively (torque) , and unit number is Nl and Nc respectively, t of ′ of F ′ C, F is the cutting force heft inside the normal plane in bevel angle cutting, ff is perpendicular Yu Faping the attrition force heft of the face, d) of ′ of Lsd, Krd, Hd(h is dynamic blade dip, tool cutting edge angle and feed horn respectively, rj, Rk is unit respectively advocate cutting blade and the radius that horizontal blade midpoint is in. Get section to consider to bore the dynamic axial force that cuts a process to get section and method of torque time analyse and resemblance of the section in getting, will advocate the dynamic axial power that cutting blade and horizontal blade are getting section place to arise and torque part overlay, the Pi of dynamic axial force that arises to get section place namely and torque Mi, namely (because getting those who cut a course to get section horizontal blade not to attend cutting,3) (4) gets a section, the dynamic axial power that gets a section so and torque give priority to cutting blade namely the Po of dynamic axial force that getting section place generation and torque Mo, namely (5) (6)(a)A=5µm, f=200Hz, f=60mm/min, m=4 (b)A=5µm, f=500Hz, f=60mm/min, m=3 (c)A=4µm, f=300Hz, f=60mm/min, m=3 (d)A=8µm, f=300Hz, f=60mm/min, m=5 (e)A=6µm, f=300Hz, f=40mm/min, m=5 (f)A=6µm, f=300Hz, f=80mm/min, m=3 pursues the computer that 2 vibration get the computer that cuts force of axial of trends of the section in getting and torque to emulate force of axial of trends of 3 3 section and torque emulates the 3 section that establish according to above to forecasted a model to weave C language emulates a program, issue pair of diameter D=0 in condition of a few kinds of different cutting. The broach of 5mm is gotten cut brass (the force of axial of trends of the section in getting when H62) and torque undertook the computer is emulated, if pursue,2 are shown. In the graph, a-b, C-d and E-f express A of oscillatory frequency F, amplitude and feed F countershaft respectively the influence of Xiang Li P and torque M. Can see from inside the graph, the axial force when vibration getting is cut and torque all present a pulse character, auger cut process intermittence, center theory according to pulse energy and stress, this is a kind of reasonable treatment method. Still can see from inside the graph, what the axial force when vibration getting is cut and torque follow parameter F, A, F is different and change, because this can pass logical choice machine parameter to optimize,get cut a course, achieve thereby decrease bradawl to cut the force, end that improves broach life. Additional, compare style (1) ～ (6) is knowable, auger the dynamic character that enter and gets section axial force and torque and the dynamic and characteristic photograph of the section in getting are compared, there just is difference on the amplitude of axial force and torque, length of be confined to, the emulation that gets force of as dynamic as what get a section axial and torque gives out no longer here. 4 epilogue exist oscillatorily as a result of axial, in bringing about vibration getting to cut a course before a series of parameter such as dip of horn, blade have dynamic character, produced vibration getting to cut the dynamic axial force with peculiar process and torque then. Vibration getting is cut changed cutting process mechanism, will common get change of cut successive cutting process to be process of pulse type cutting, accord with pulse energy and stress to center theory consequently, because this is a kind of reasonable treatment method. CNC Milling
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