Abstract: Point grinding force theory model has been changed with the abrasive particle motion trail because of deflection angle α, which exists between the grinding wheel axis and workpiece axis. On the basis of traditional grinding force theory, the point grinding force theory model is built by using the point grinding model transformation and is verified correct. Test results show that the model calculated value is similar to the test results and the trend is consistent. So point grinding force model provides an auxiliary and validation method for the actual processing. At the same time, a novel point grinding wheel with coarse grinding area angle is put forward, the grinding force distribution of the novel grinding wheel is further developed based on point grinding force model. The model is validated by point grinding experiment, using grinding wheels with different coarse grinding area angles to grind ladder shafts under a series of grinding parameters. Experiments show that the theory model results are consistent with the tests, grinding force of the novel wheels with different coarse grinding area angles are less than the traditional grinding wheel with θ=0° under the same grinding parameters, grinding force decreases with the θ increase. In addition, the trend of grinding force influenced by deflection angle α, grinding depth a_p and grinding wheel speed v_s can be obtained.

Key words: grinding force, model, novel grinding wheel, point grinding