Identification And Research On Characteristic Parameter Of Metallurgical Powder Material Joint

Numerical control machine tool is equipment, whose machinery structure is verycomplicated, and whose requires of static and dynamic function is very high, the NCmachine tool is also a precision, high-effective, automation, flexibility treatingequipment. But its design technology relates to a lot of discipline field, especially inascertaining accessory parameters, such as stiffness, damp. The stiffness model isdifficult to accurate reflect actual situation, the workload of saluting machinemathematic model is very enormous, so there having not been found a satisfactorymachine structure fleetness optimization design system. It will produce far-reachinginfluence in our country manufacturing industry that getting a breakthrough in listingthe field studying below.(1) Determines joint stiffness and damp modulus accurately;(2) Studies the design procedures gaining high stiffness and damp joint;(3) Builds accurate finite element method analysis model under the situation ofthinking that joint touches state.In the past study of the joints characteristic parameter testing job, it's fond that afteradding medium in joints, the unit area damp improves an order of magnitude and theunit area stiffness improves one times. The key is that the structure of oiling the jointsin the progress of the job. For metallurgical powder material, the oil will oozing fromthe holes, being all over on the small opening outside. When the joints' work stop, theoil will shrink again and return to the body, the decrement of the oil is little, so thesupplement of oil is unnecessarily in the course of work. From that opinion, therehave gained an idea of using the metallurgical powder material to make joints, it maymake joint charge oil for a long range. Besides, metallurgical powder material havebigger dissipation factor, can improve metallurgical powder material's stiffness anddamp modulus.This treatise is based on making joint with metallurgical powder material, andconstitute uncoupling model with one degree of freedom of experimental system,identify the stiffness and damp in the two cases: no medium and with oil on the joints,to get the scientific and accurate data, study the method of getting the joint of highstiffness and big damp modulus, provide academic consult for the design of modernhigh antivibration machinery.