Abstract
Assembling plays a significant role in the performance of large-scale CNC gear profile grinding machines. An approach in the deviation evaluation of ground tooth surfaces taking into account assembly errors is proposed in this paper. Based on the error transmission chain of the profile grinding system and the conjugate motion relationship between the grinding wheel and the workpiece, the ground tooth surface model including assembly errors was established using the surface envelope method. Then, the effect of assembly errors on deviations of the profile grinding tooth surface was quantitatively analyzed. The optimized distribution of assembly errors and machining verifications were performed on large-scale CNC gear profile grinding machines. The results show that the proposed method is effective at ensuring ground tooth surface deviations for large-scale CNC gear profile grinding machines.
Highlights
Large module precision gears with hardened tooth surfaces are widely used in the fields of wind power, ships, engineering machinery, etc
The ground tooth surface deviations are the major target parameter for a gear profile grinding machine, and they are mainly caused by grinding interference and machine errors [4]
Xia et al proposed a model of tooth surface deviations and geometric errors f five-axis gear profile grinding machine, and critical errors and sensitive components w identified by sensitivity analysis method [21]; assembly errors were not refer to in that research
Summary
Large module precision gears with hardened tooth surfaces are widely used in the fields of wind power, ships, engineering machinery, etc. The ground tooth surface deviations are the major target parameter for a gear profile grinding machine, and they are mainly caused by grinding interference and machine errors (including assembly errors, geometric errors, and thermal errors) [4]. The former can be reduced by adjusting setting the parameters and radius of the wheel. Xia et al proposed a model of tooth surface deviations and geometric errors f five-axis gear profile grinding machine, and critical errors and sensitive components w identified by sensitivity analysis method [21]; assembly errors were not refer to in that research. Assembly errors of the gear grinding system are highlighted in this paper
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