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Computer simulation technology in grinding temperature field

Number of visits: Date:2014-04-21

    Grinding is a widely used method for precision machining . In a study of grinding , due to the limited understanding of the mechanism of the process , so the actual adjustment of the grinding process mostly by trial and error ( ie the operator with vast experience accumulated knowledge ) to carry out, particularly in relation to grinding temperature analysis model , mostly obtained through single factor . With the increasing computer performance simulation technology in the industry more widely, to study the theory of grinding brought new ideas to make it possible for us to overcome the limitations of traditional research methods , in-depth study of the grinding process grinding temperature changes, create a system of grinding temperature field theory models.
The simulation is achieved in a simulated environment and predict product performance and characteristics of the real environment ( dynamic and static ) , which contains from modeling, loads and constraints to predict product series of steps in response to real life situations , such as applying . Through the process of observation and simulation estimates obtained by the simulation output parameter simulation system and the basic characteristics , parameters and thus to estimate the true authenticity of the actual system performance and inference . The use of computer simulation technology , you can get a variety of changes in the grinding temperature field under different input parameters in complex grinding process, thus creating the conditions for the further study of the grinding mechanism .
2 mathematical model of grinding temperature field
Mathematical model of grinding temperature field using the finite element method. Since the entire grinding temperature field satisfy the law of conservation of energy , the heat conduction equation for the temperature field of grinding :
? PC q -? (Kx q?) -? (? Ky q) -? (Kz q?)-RQ = 0
? t? x? x? y? y? z? z
( In W)
Where W is the entire domain , which consists of three types of boundary conditions , namely : q = q (l, t) ( the boundary l1 )
kx? q nx + ky? q ny + kz? q nz = q
? x? y? z
( The boundary G2 )
kx? q nx + ky? q ny + kz? q nz = a (qa-q)
? x? y? z
( On the G3 border )
According to the principle of discrete finite element method , the work is divided into a finite number of units and the grinding process heat load applied to the cell boundary, that is, the overall temperature of the load and the actual load is equivalent discrete node load into the three types of boundary conditions can be obtained by finite element model of the grinding temperature field.

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