This paper provides an analysis of the processing status and the existing problems of leading and trailing edges, and proposes a new seven-axis linkage CNC grinding method. Whats more, the paper carries out the forging blade edge abrasive belt grinding experiment. Finally, on the basis of experimental result, grinding process parameters are optimized, and the improved scheme is put forward. Through the experiment, the feasibility of the seven-axis CNC abrasive belt grinding method is verified.
Numerical simulation method was used in this paper and 3-D structure of model was established with Pro/Engineering. It is evident that the efficiency of electric-bag is related to internal fluid field. The internal fluid field characteristics (pressure field, velocity field, turbulence field and particle tracks) are obtained by the numerical simulation soft called Fluent, the result show that airflow distribution could be improved obviously by the flow deflectors in electrostatic precipitation area. And the distribution of DPM in filter area is non uniform, which would lead to various damage on bags and affect the operation of electrostatic fabric filter. All these work have important significance for the study of new dust removal technology, developments of high performance precipitator, reduction of dust pollution and control of air pollution as well.
Planetary gear drive with minor teeth difference (zd≤8) is one of the advanced transmitting styles and could meet the requirement of larger ratio in a smaller size of dimension. Generally the gears with addenda modifications play a principal role in planetary gear drive of minor teeth difference to avoid teeth interference during the mesh, and this transmission implies cumbersome parameters calculations and brings up higher angle of engagement to affect the load capacity because of life weakening on carrier bearings involved. In fact, provided some certain promise, zero addenda modification (viz. X-zero) drive with minor teeth difference could also qualify for gearing conditions so as to reduce the complicacy of calculations and angle of engagement mentioned above. From investigating the relationships amongst the total teeth number of internal gear, difference of tooth number between internal and external gear, addendum coefficient and teeth profile interference criterion, the unique design characteristic about X–zero gear drive with minor teeth difference are outlined.
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